[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"$fxLN3MUwXCdr5RPjwZYIDpOj8CHyjOmngWTgoKXPtZbg":3,"$f0OhuJjoKf6mNLCAR3hMm20KW7tfbSUShuwBtFNHK9ac":36,"$f3Ft0rKFJHppdzE-vuveecxx1BUcg9iOlMLtyzf_MJDg":238,"$fucxFBm2ZjZfGSdmdRaSNGBI_F0jJme4f0GTvzUhQfL8":301},[4,8,12,16,20,24,28,32],{"title":5,"slug":6,"path":7},"About Microbeonline.com","about-microbeonline-com","\u002Fabout-microbeonline-com\u002F",{"title":9,"slug":10,"path":11},"About Me","about-me","\u002Fabout-microbeonline-com\u002Fabout-me\u002F",{"title":13,"slug":14,"path":15},"Advertise with Us","advertise-us","\u002Fadvertise-us\u002F",{"title":17,"slug":18,"path":19},"Privacy Policy","privacy-policy","\u002Fprivacy-policy\u002F",{"title":21,"slug":22,"path":23},"Authors","authors","\u002Fauthors\u002F",{"title":25,"slug":26,"path":27},"Microbes","microbes","\u002Fmicrobes\u002F",{"title":29,"slug":30,"path":31},"Books","recommended-books","\u002Frecommended-books\u002F",{"title":33,"slug":34,"path":35},"Tags","tags","\u002Ftags\u002F",{"type":37,"data":38},"blog",{"slug":39,"title":40,"description":41,"seoTitle":42,"seoDescription":42,"author":43,"createdDate":44,"lastUpdatedDate":45,"draft":46,"category":47,"image":42,"body":48,"faq":49,"commentsClosed":46,"tags":62,"related":63,"comments":234},"ultrasonication-principle-parts-and-application","Ultrasonication: How Cavitation Breaks Open Cells (Principle, Parts, Uses)","How ultrasonication works: sound waves create and collapse tiny bubbles (cavitation) whose implosion tears cells open. Its parts, uses in cell lysis, and why you must keep the sample cold.",null,"Samikshya Acharya","2023-06-18","2026-08-21",false,"lab-equipment","A student sonicates a bacterial suspension to release the protein they need, running the probe continuously for two minutes to be thorough. The cells lyse, but the protein is denatured and useless. The mistake was not the sonication; it was the heat.\n\nSonication works by collapsing microscopic bubbles inside the liquid, and each collapse releases an intense burst of local heat. Run continuously, that heat cooks the very molecules you are trying to extract. Understanding how ultrasound breaks a cell open, and why it also heats the sample, is what separates a clean lysate from a ruined one. It all comes down to a process called cavitation.\n\nUltrasonication, also known as sonication, is one of the **homogenization techniques** that use high-frequency sound waves (that is, above 20 kHz) to break large particles into smaller fragments or better uniform-sized particles in the base fluid.\n\nDue to its versatility and effectiveness, this technique is commonly used in various fields, including chemistry, biology, materials science, and food processing. This technique is applicable for multiple purposes, such as cell disruption, nanoparticle dispersion, degassing, and cleaning of solid surfaces.\n\n## Principle\n\nUltrasonication uses high-frequency sound waves, above the range of human hearing (typically 20 kHz and higher), to disrupt cells and particles in a liquid. Following it as a chain, each step explains the next.\n\n![Experimental setup for ultrasonication](\u002Fblogs\u002FSchematic-representation-of-the-experimental-setup.png)Figure: Experimental setup for ultrasonication\n\n**Why sound can do mechanical work.** A sound wave is a pressure wave. As it travels through a liquid, it rapidly alternates the local pressure: a low-pressure phase where the liquid is pulled apart, and a high-pressure phase where it is pushed together. At ultrasonic frequencies this happens tens of thousands of times per second.\n\n**Why bubbles form (cavitation).** During each low-pressure phase, the liquid is stretched so hard that it briefly tears apart, forming tiny vapor-filled bubbles. This formation of bubbles by sound is called acoustic cavitation. The bubbles grow slightly over successive cycles.\n\n\u003Cfigure>\n\u003Cimg src=\"https:\u002F\u002Fassets.microbeonline.com\u002Fblogs\u002Fultrasonication-cavitation-cell-lysis.png\" alt=\"Cavitation in ultrasonication: a bubble forms, grows, then implodes and tears a cell open, releasing heat\" width=\"2720\" height=\"1360\" draggable=\"false\" contenteditable=\"false\">\u003Cfigcaption>Figure: Cavitation. Sound forms a bubble that grows and implodes; the collapse shear tears the cell open and releases heat.\u003C\u002Ffigcaption>\n\u003C\u002Ffigure>\n\n**Why the bubbles collapse violently.** When a bubble reaches an unstable size, the next high-pressure phase crushes it, and it implodes, collapsing in on itself almost instantly. This implosion is the actual working event of a sonicator.\n\n**Why the collapse breaks cells open.** Each implosion is tiny but extreme. It generates powerful local shear forces and micro-jets of liquid, and for a fraction of a second an intense spot of local heat and pressure. Cells caught near a collapsing bubble are torn apart by these shear forces, their cell walls and membranes ruptured. Thousands of collapses per second across the sample add up to thorough disruption.\n\n**Why the sample heats up.** The same implosions that break cells also dump energy into the liquid as heat. Over seconds of continuous sonication, the sample temperature climbs quickly. This is the central practical problem with sonication, covered below, because that heat can destroy the proteins, enzymes, or nucleic acids you are trying to release.\n\nIn short: sound makes bubbles, the bubbles implode, and the implosions tear cells apart while also heating the sample.\n\n## Why Heat Is the Enemy, and How to Control It\n\nThe heat generated by cavitation is the main reason sonication goes wrong. Controlling it is the core skill.\n\n**Pulse, do not run continuously.** Sonicate in short bursts (for example a few seconds on, a few seconds off) rather than one long run. The off periods let the heat dissipate so the sample does not cook. Most protocols specify a pulse cycle for exactly this reason.\n\n**Keep the sample on ice.** Hold the tube in an ice bath throughout. Heat-sensitive targets such as enzymes, proteins, and nucleic acids denature or degrade if the sample warms, so keeping it cold, near the refrigeration temperatures used to protect such samples (see [refrigerator](https:\u002F\u002Fmicrobeonline.com\u002Flaboratory-refrigerator-temperature-and-storage\u002F)), preserves what you are extracting.\n\n**Do not over-sonicate.** More sonication is not better. Once the cells are lysed, further bursts only add heat and can shear DNA into fragments or denature proteins. Use the minimum needed.\n\n**Avoid foaming.** Excessive foaming means air is being drawn in, which reduces cavitation efficiency and denatures proteins at the air-liquid interface. Keep the probe tip below the surface and the power moderate.\n\n## Parts of Sonicator\n\nThe machine used to carry out ultrasonication is known as a sonicator. The significant parts of the sonicator are as follows:\n\n![Sonicator](\u002Fblogs\u002FSonicator.jpg)Figure: Sonicator\n\n**Generator**\n\nThe generator supplies high-frequency electrical energy that drives the transducer. Its controls (keypads or knobs) set the parameters used during sonication, such as amplitude, pulse cycle, and total time.\n\n**Converter**\n\nIt is also known as a transducer. Because of the properties of the intrinsic piezoelectric crystals, the converter converts electrical signals into high-frequency mechanical vibration (above 20 kHz). Furthermore, the generator and transducer are connected by high-voltage cable, and generated pulse is amplified and transmitted down the probe.\n\n**Probe**\n\nIt is also known as a horn or tip. The probe is attached to the transducer and amplifies the ultrasonic vibrations generated by the transducer into a longitudinal vibration resulting in a cavity in the sample.\n\n**Sonication vessel**\n\nThe sonication vessel or container holds the sample that needs to be processed. It is typically made of glass or plastic and can vary in size and shape depending on the application. The vessel should be compatible with the sonicator’s probe or horn for effective sample processing. The vessel itself is not soundproof; noise control comes from running the sonicator inside an enclosure or acoustic hood, covered under Precautions.\n\n### Probe vs. Bath Sonicator\n\nTwo forms are used in the laboratory, and the choice matters.\n\n- **Probe (horn) sonicator:** a metal probe dips directly into the sample and delivers intense, focused energy. It lyses cells quickly and is the choice for tough samples, but it heats the sample fast (so pulsing and ice are essential), can contaminate between samples, and processes one tube at a time.\n- **Bath sonicator:** samples in tubes sit in a water bath through which ultrasound passes. It is gentler and processes several tubes at once without direct contact (no cross-contamination), but it is slower and less powerful, better for mild disruption, degassing, and cleaning than for hard cell lysis.\n\nThe rule: reach for the probe when you need fast, forceful lysis of one sample, and the bath when you need gentle or parallel processing of several.\n\n## Applications of Ultrasonication\n\nUltrasonication is a technique that has many applications, which are as follows:\n\n1. It is used for [homogenization](\u002Fhomogenizer-parts-types-and-function\u002F) and emulsification in food and beverage, pharmaceuticals, cosmetics, and paint manufacturing industries.\n2. It is used to clean rust surfaces, jewelry, and delicate laboratory equipment.\n3. It is used to reduce particles’ size and synthesize nanoparticles applicable in pharmaceuticals and nanotechnology.\n4. It is also an energy source in chemical reactions such as organic synthesis, wastewater treatment, and environmental remediation.\n5. It removes dissolved gases or bubbles in a liquid, a process known as degassing.\n6. It is also used in gene therapy, target therapy, and drug delivery.\n7. Cell lysis and extraction: sonication ruptures cells to release their contents, a common first step in extracting proteins, enzymes, and nucleic acids (see DNA extraction). This is its primary use in the microbiology and molecular biology laboratory.\n\n## Advantages of Ultrasonication\n\nUltrasonication has lots of benefits in various fields, which are as follows;\n\n1. It is an efficient and rapid processing method.\n2. It is simple to operate and requires minimal maintenance.\n3. It is a versatile technique applicable to various samples and materials.\n4. It effectively reduces the size of particles, leading to improved homogeneity and uniformity of materials.\n\n## Disadvantages of Ultrasonication\n\nUltrasonication also has some disadvantages, which are as follows;\n\n1. This technique has limited penetration depth.\n2. The intense mechanical forces generated during ultrasonication can cause sample degradation, particularly for delicate biological or sensitive compounds.\n3. It can generate heat that leads to sample heating, which may affect the stability of heat-sensitive compounds or induce unwanted reactions.\n4. High-quality ultrasonic equipment can be relatively expensive, especially for industrial-scale applications or specialized setups.\n\n## Precautions\n\n1. It should be carried out in a soundproof chamber to minimize noise and any potential hazards from the ultrasonic energy.\n2. Use appropriate personal protective equipment (PPE) to protect from high-frequency energy.\n3. Always carry out ultrasonication in a sonication vessel in order to avoid spillage of the sample.\n\n## How to Remember\n\n**Bubbles, not sound, break the cell.** The counterintuitive core: ultrasound does not shake cells apart directly. It creates tiny bubbles that implode, and those implosions do the tearing. Picture a collapsing bubble as a microscopic explosion next to the cell. That image is the whole principle.\n\n**Every implosion is also a spark of heat.** The same collapses that lyse the cells heat the sample. That is why you pulse and keep it on ice: you want the shear force without the cooked protein. Break, do not bake.\n\n## Key Exam Facts in One Table\n\n| Fact | Detail |\n| --- | --- |\n| Working principle | Acoustic cavitation: sound forms bubbles that implode |\n| Frequency | Ultrasonic, typically 20 kHz and above |\n| What disrupts the cell | Shear forces and micro-jets from imploding bubbles, not the sound itself |\n| Main use | Cell lysis to release proteins, enzymes, and nucleic acids |\n| Main problem | Heat generated by cavitation denatures the target |\n| Heat control | Pulse (on\u002Foff cycles) and keep the sample on ice |\n| Probe sonicator | Direct, intense, fast; heats quickly; one sample at a time |\n| Bath sonicator | Indirect, gentle; several samples; degassing and cleaning |\n| Over-sonication | Shears DNA and denatures protein; use the minimum needed |\n| Other uses | Degassing, mixing, cleaning, nanoparticle dispersion |\n\n## Where Students Get Confused\n\n**What actually breaks the cell.** The sound waves do not directly shake cells apart. They create imploding bubbles (cavitation), and the shear forces from those implosions tear the cells open. Cavitation is the mechanism, not the sound alone.\n\n**Why the sample must stay cold.** Sonication generates heat with every bubble collapse. Students who run it continuously denature the proteins they are trying to extract. Pulsing and an ice bath keep the sample cold enough to preserve the target.\n\n**Probe vs. bath sonicator.** A probe goes into the sample for fast, forceful lysis but heats quickly and handles one tube. A bath is gentler, contact-free, and handles several tubes, but is weaker. The task decides which.\n\n**More is not better.** Once cells are lysed, extra sonication only adds heat and shears DNA or denatures protein. The goal is the minimum disruption that does the job.\n\n**Reference**\n\n1. Wilson, K., & Walker, J. (2018). *Principles and Techniques of Biochemistry and Molecular Biology* (8th ed.). Cambridge University Press.\n2. Tille, P. M. (2022). *Bailey & Scott's Diagnostic Microbiology* (15th ed.). Elsevier.\n3. Suslick, K. S. (1990). Sonochemistry. *Science, 247*(4949), 1439–1445. \u003Chttps:\u002F\u002Fdoi.org\u002F10.1126\u002Fscience.247.4949.1439>",[50,53,56,59],{"question":51,"answer":52},"\u003Cp>What is the principle of ultrasonication?\u003C\u002Fp>","\u003Cp>Ultrasonication uses high-frequency sound waves (20 kHz and above) to create tiny bubbles in a liquid, a process called acoustic cavitation. These bubbles grow and then violently implode, and the shear forces from their collapse tear cells and particles apart. It is the imploding bubbles, not the sound directly, that do the work.\u003C\u002Fp>",{"question":54,"answer":55},"\u003Cp>What is cavitation?\u003C\u002Fp>","\u003Cp>Cavitation is the formation and collapse of tiny vapor bubbles caused by the pressure changes of a sound wave in a liquid. The low-pressure phase of the wave forms the bubbles, and the high-pressure phase implodes them, releasing intense local shear forces and heat.\u003C\u002Fp>",{"question":57,"answer":58},"\u003Cp>What is the difference between a probe and a bath sonicator?\u003C\u002Fp>","\u003Cp>A probe (horn) sonicator dips directly into the sample and delivers intense, focused energy for fast cell lysis, but it heats the sample quickly and handles one tube at a time. A bath sonicator passes ultrasound through a water bath, which is gentler and processes several tubes at once without contact, better for degassing, cleaning, and mild disruption.\u003C\u002Fp>",{"question":60,"answer":61},"\u003Cp>What is ultrasonication used for?\u003C\u002Fp>","\u003Cp>Its main laboratory use is cell lysis, rupturing cells to release proteins, enzymes, and nucleic acids for extraction. It is also used for degassing liquids, mixing and dispersing particles, preparing nanoparticles, and cleaning instruments.\u003C\u002Fp>",[],[64,89,112,139,148,172,198,220],{"slug":65,"title":66,"description":67,"seoTitle":42,"seoDescription":42,"author":68,"createdDate":69,"lastUpdatedDate":70,"draft":46,"category":47,"image":42,"faq":71,"tags":87},"laboratory-refrigerator-temperature-and-storage","Laboratory Refrigerator: Temperature, What to Store at Each, and Storage Rules","Laboratory refrigerator temperatures explained, which reagents, sera, vaccines, and blood products belong at 2-8 degrees C, why freezing destroys some of them, and the storage rules that keep samples usable. A practical guide for lab science students.","Acharya Tankeshwar","2026-07-28","2026-08-12",[72,75,78,81,84],{"question":73,"answer":74},"What temperature is a laboratory refrigerator set to?","A laboratory refrigerator is kept at 2–8°C, with about 4°C as the usual set point. This range slows chemical reactions, enzyme activity, and microbial growth while staying above freezing, which protects reagents, sera, vaccines, and blood products that ice crystals would damage.",{"question":76,"answer":77},"Why are some reagents and vaccines refrigerated instead of frozen?","Freezing forms ice crystals that denature proteins and rupture cells, which destroys many control sera, antibodies, and vaccines. For these items, 2–8°C preserves activity while freezing would ruin them, so colder is not automatically better.",{"question":79,"answer":80},"Why are platelets not stored in the refrigerator?","Platelets are stored at 20–24°C (room temperature) with continuous gentle agitation. Refrigeration damages platelet function and stillness causes them to clump, so unlike red cells and plasma, platelets are never refrigerated.",{"question":82,"answer":83},"Why should nothing sensitive be stored in the refrigerator door?","The door is the warmest and most temperature-variable part of the refrigerator, because it warms every time the fridge is opened. Sensitive items such as controls, sera, vaccines, and blood should be kept on the internal shelves where the temperature is stable.",{"question":85,"answer":86},"What is the difference between a laboratory refrigerator and a blood bank refrigerator?","A blood bank refrigerator is a specialized laboratory refrigerator held at 2–6°C with a tighter temperature tolerance, a continuous temperature log, and an audible alarm. The stricter monitoring exists because a temperature error can make blood unsafe to transfuse.",[88],"laboratory-storage-and-preservation",{"slug":90,"title":91,"description":92,"seoTitle":42,"seoDescription":42,"author":43,"createdDate":93,"lastUpdatedDate":94,"draft":46,"category":47,"image":42,"faq":95,"tags":111},"homogenizer-parts-types-and-function","Homogenizer: Types, How to Choose One, Parts, and Functions","The types of homogenizer (rotor-stator, pressure, bead-mill, ultrasonic), how each breaks a sample down, and which one to use for soft tissue, tough cells like fungi and spores, or emulsions.","2022-09-08","2026-08-25",[96,99,102,105,108],{"question":97,"answer":98},"\u003Cp>What is a homogenizer used for?\u003C\u002Fp>","\u003Cp>A homogenizer breaks a sample into a uniform mixture, either by rupturing cells to release their contents (proteins, enzymes, nucleic acids) or by blending components into a stable emulsion. In the laboratory its main use is cell disruption before extraction and purification.\u003C\u002Fp>",{"question":100,"answer":101},"\u003Cp>What are the main types of homogenizer?\u003C\u002Fp>","\u003Cp>The four main types are rotor-stator (mechanical shearing), high-pressure (forcing the sample through a narrow valve), bead-mill or bead-beater (grinding cells with beads), and ultrasonic (cavitation from high-frequency sound). Each disrupts a sample by a different mechanism.\u003C\u002Fp>",{"question":103,"answer":104},"\u003Cp>Which homogenizer is best for tough cells like fungi or spores?\u003C\u002Fp>","\u003Cp>A bead-mill (bead-beater) is best for tough-walled cells such as fungi, yeast, bacterial spores, and mycobacteria. Their walls resist shearing, so they must be physically ground open by hard beads, which gentler methods like a rotor-stator cannot achieve.\u003C\u002Fp>",{"question":106,"answer":107},"\u003Cp>What is the difference between a homogenizer and a sonicator?\u003C\u002Fp>","\u003Cp>A sonicator is one type of homogenizer, the ultrasonic type, which uses cavitation to lyse cells and suits small volumes. Other homogenizers (rotor-stator, high-pressure, bead-mill) use mechanical shearing, pressure, or grinding and handle larger or tougher samples.\u003C\u002Fp>",{"question":109,"answer":110},"\u003Cp>Why does the sample get hot during homogenization?\u003C\u002Fp>","\u003Cp>Mechanical and ultrasonic homogenization put energy into the sample, which turns into heat. This heat can denature the proteins, enzymes, or nucleic acids being extracted, so heat-sensitive samples are kept cold, often on ice, during the process.\u003C\u002Fp>",[],{"slug":113,"title":114,"description":115,"seoTitle":42,"seoDescription":42,"author":116,"createdDate":117,"lastUpdatedDate":118,"draft":46,"category":47,"image":42,"faq":119,"tags":138},"electroporator-principle-parts-and-uses","Electroporator: How Electrical Pulses Open Cell Membranes, Principle, Parts, and Uses","How an electroporator uses a brief high-voltage pulse to open transient pores in the cell membrane so DNA can enter, the difference between reversible electroporation for transformation and irreversible electroporation for tissue ablation, its parts, and its uses.","Ashma Shrestha","2023-09-19","2026-08-01",[120,123,126,129,132,135],{"question":121,"answer":122},"\u003Cp>What is the principle of an electroporator?\u003C\u002Fp>","\u003Cp>It applies a brief, high-voltage electrical pulse to a cell suspension. The pulse raises the voltage across the cell membrane past a threshold, which forms transient pores in the lipid bilayer. While the pores are open, DNA or other molecules enter the cell. If the pulse is within the survivable range, the pores reseal and the cell lives, now carrying the introduced material.\u003C\u002Fp>",{"question":124,"answer":125},"\u003Cp>What is the difference between reversible and irreversible electroporation?\u003C\u002Fp>","\u003Cp>In reversible electroporation the pores reseal after the pulse and the cell survives, which is the goal of transformation and transfection. In irreversible electroporation the pulse is strong enough that the pores do not reseal and the cell dies. Irreversible electroporation is used deliberately in medicine to ablate tumors without heat.\u003C\u002Fp>",{"question":127,"answer":128},"\u003Cp>Why did my electroporation kill the cells?\u003C\u002Fp>","\u003Cp>Most often the pulse was too strong or too long, pushing the membrane past the reversible threshold into irreversible electroporation. Arcing from high-salt samples or air bubbles also kills cells. Lowering the field strength and washing cells into low-salt medium usually fixes it.\u003C\u002Fp>",{"question":130,"answer":131},"\u003Cp>Why does the electrode gap of the cuvette matter?\u003C\u002Fp>","\u003Cp>Because the cell responds to field strength, which is the voltage divided by the gap between the electrodes. The same voltage gives a stronger field in a 1 mm cuvette than in a 4 mm one. Using the wrong gap for a protocol changes the actual field the cells experience.\u003C\u002Fp>",{"question":133,"answer":134},"\u003Cp>What is the difference between exponential-decay and square-wave electroporators?\u003C\u002Fp>","\u003Cp>An exponential-decay electroporator discharges a capacitor, so the voltage starts high and falls exponentially; it is standard for bacteria and yeast. A square-wave electroporator holds the voltage constant for a set time then stops; it is gentler and better for fragile mammalian cells.\u003C\u002Fp>",{"question":136,"answer":137},"\u003Cp>Is electroporation better than chemical (heat-shock) transformation?\u003C\u002Fp>","\u003Cp>Electroporation is usually more efficient and works with a wide range of cells, but it needs specialized equipment and low-salt samples to avoid arcing. Chemical transformation is simpler and needs no instrument but is generally less efficient. The choice depends on the cell type, the efficiency needed, and the equipment available.\u003C\u002Fp>",[],{"slug":140,"title":141,"description":142,"seoTitle":141,"seoDescription":143,"author":116,"createdDate":144,"lastUpdatedDate":145,"draft":46,"category":47,"image":42,"faq":146,"tags":147},"microtome-parts-types-and-uses","Microtome: Parts, Sectioning Steps, Types, and Common Errors","Microtome parts and types, and the part that decides a usable slide: how to cut a section at 3 to 5 micrometers and fix the common faults like chatter, compression, and alternating thick-thin sections.","Identify key microtome parts, compare rotary, sliding, freezing, and ultramicrotome designs, and prevent section compression, chatter, and folds.","2023-04-12","2026-08-22",[],[],{"slug":149,"title":150,"description":151,"seoTitle":42,"seoDescription":42,"author":43,"createdDate":152,"lastUpdatedDate":153,"draft":46,"category":47,"image":42,"faq":154,"tags":170},"hot-plate-parts-types-and-applications","Hot Plate: Parts, Types, Uses, and Hot Plate vs. Bunsen Burner and Stirrer","How a laboratory hot plate works, its parts and types, when to use a hot plate versus a Bunsen burner, magnetic stirrer, or water bath, and the mistakes that scorch media and crack glassware.","2023-03-27","2026-07-30",[155,158,161,164,167],{"question":156,"answer":157},"\u003Cp>What is a hot plate used for in a microbiology laboratory?\u003C\u002Fp>","\u003Cp>A hot plate is used mainly to prepare and melt culture media and to warm reagents. With a built-in magnetic stirrer, it also dissolves solutes evenly into buffers and solutions while heating them.\u003C\u002Fp>",{"question":159,"answer":160},"\u003Cp>What is the difference between a hot plate and a hot plate stirrer?\u003C\u002Fp>","\u003Cp>A plain hot plate only heats the sample. A hot plate stirrer adds an electromagnet beneath the surface that spins a magnetic stir bar in the solution, so the sample is heated and mixed at the same time. For media and buffer preparation, the stirrer version is usually preferred.\u003C\u002Fp>",{"question":162,"answer":163},"\u003Cp>When should I use a water bath instead of a hot plate?\u003C\u002Fp>","\u003Cp>Use a water bath when a sample needs gentle, even heating at a precise temperature, such as holding serum or reagents at 37°C or 56°C. A hot plate gives high, direct, dry heat that can scorch or overshoot, so it is the wrong tool for heat-sensitive work.\u003C\u002Fp>",{"question":165,"answer":166},"\u003Cp>Why should flammable solvents not be heated on a hot plate?\u003C\u002Fp>","\u003Cp>A hot plate surface can reach about 350°C, which is well above the flash point of common solvents like ether, acetone, and hexane. Heating these on an open hot plate can ignite them, so they are heated by other means such as a water bath in a fume hood.\u003C\u002Fp>",{"question":168,"answer":169},"\u003Cp>Why does my agar scorch on the hot plate?\u003C\u002Fp>","\u003Cp>Scorching happens when the heat is set too high and the media is not stirred. Because a hot plate heats from the bottom by direct contact, the layer touching the plate burns before the rest melts. Use moderate heat with stirring, or melt agar in a water bath or by autoclaving.\u003C\u002Fp>",[171],"laboratory-heating-equipment",{"slug":173,"title":174,"description":175,"seoTitle":42,"seoDescription":42,"author":116,"createdDate":176,"lastUpdatedDate":177,"draft":46,"category":47,"image":42,"faq":178,"tags":197},"dna-analyzer-working-principle-operation-and-uses","DNA Analyzer (Genetic Analyzer): How Capillary Electrophoresis Reads DNA, Parts, and Uses","How a DNA analyzer separates DNA fragments by size using capillary electrophoresis, how four fluorescent dyes are turned into a readable electropherogram, the difference between sequencing and fragment analysis, and the instrument's parts and uses.","2022-11-30","2026-07-31",[179,182,185,188,191,194],{"question":180,"answer":181},"\u003Cp>What is the working principle of a DNA analyzer?\u003C\u002Fp>","\u003Cp>It separates DNA fragments by size using capillary electrophoresis. Fragments are injected at the cathode end of a polymer-filled capillary and driven by high voltage toward the anode; smaller fragments move faster and reach the detector first. A laser excites a fluorescent dye on each fragment, and a CCD records the color and arrival time, producing an electropherogram.\u003C\u002Fp>",{"question":183,"answer":184},"\u003Cp>What is the difference between DNA sequencing and fragment analysis on a genetic analyzer?\u003C\u002Fp>","\u003Cp>Sequencing reads the order of bases in a DNA strand, using four dye-labeled dideoxy terminators so the color order equals the base order. Fragment analysis does not read bases; it measures the precise sizes of labeled fragments against a size standard, as in STR profiling or SNP genotyping. The same instrument and the same size separation serve both, but the chemistry and the readout differ.\u003C\u002Fp>",{"question":186,"answer":187},"\u003Cp>Why do smaller DNA fragments move faster in capillary electrophoresis?\u003C\u002Fp>","\u003Cp>The capillary is filled with a polymer that acts as a molecular sieve. Smaller fragments navigate the polymer network more easily and migrate faster, so they reach the detector before larger fragments. This is why fragments arrive in order of increasing size.\u003C\u002Fp>",{"question":189,"answer":190},"\u003Cp>What is an electropherogram?\u003C\u002Fp>","\u003Cp>It is the output plot of a DNA analyzer: fluorescence intensity plotted against fragment size or migration time, shown as a series of colored peaks. In a sequencing run the peak colors are read as the base sequence; in fragment analysis the peaks are sized and matched to known alleles.\u003C\u002Fp>",{"question":192,"answer":193},"\u003Cp>What is the difference between spatial and spectral calibration?\u003C\u002Fp>","\u003Cp>Spatial calibration maps the physical position of each capillary to the correct pixels on the CCD detector, and is done when the array is installed or the instrument is moved. Spectral calibration teaches the software to separate the overlapping emission colors of the dyes, preventing one dye from being misread as another (pull-up), and is done when a new dye set is used or after the laser or detector is serviced.\u003C\u002Fp>",{"question":195,"answer":196},"\u003Cp>Why check the size standard before interpreting a result?\u003C\u002Fp>","\u003Cp>The internal size standard runs in every capillary and confirms that separation and detection worked. If the size standard is clean, the instrument performed correctly and any problem lies in the sample. If the size standard is wrong or missing, no base call or allele call from that capillary can be trusted.\u003C\u002Fp>",[],{"slug":199,"title":200,"description":201,"seoTitle":42,"seoDescription":42,"author":43,"createdDate":202,"lastUpdatedDate":153,"draft":46,"category":47,"image":42,"faq":203,"tags":219},"analytical-balance-parts-principle-and-applications","Analytical Balance: Parts, Functions, Principle, and How to Weigh Accurately","Analytical balance parts and their functions, how electromagnetic force restoration works, and the weighing errors (air currents, static, temperature) that ruin a reading, and how to avoid them.","2022-11-14",[204,207,210,213,216],{"question":205,"answer":206},"\u003Cp>What is an analytical balance used for?\u003C\u002Fp>","\u003Cp>An analytical balance measures mass to 0.1 mg (four decimal places of a gram), so it is used wherever small, precise weights matter: preparing standard solutions and reagents, weighing media components, gravimetric analysis, and quality control in pharmaceutical, chemical, and food work.\u003C\u002Fp>",{"question":208,"answer":209},"\u003Cp>How does an analytical balance work?\u003C\u002Fp>","\u003Cp>It uses electromagnetic force restoration. An electromagnet generates an upward force to counter the weight of the sample on the pan, and the current needed to do this is proportional to the mass, which the balance displays. It measures force, not weight directly.\u003C\u002Fp>",{"question":211,"answer":212},"\u003Cp>Why does an analytical balance have a glass draft shield?\u003C\u002Fp>","\u003Cp>Because at 0.1 mg resolution, moving air is enough to disturb the reading. The draft shield encloses the pan so air currents, and dust, cannot affect the measurement. Always weigh with the shield closed.\u003C\u002Fp>",{"question":214,"answer":215},"\u003Cp>Why does my analytical balance reading keep drifting?\u003C\u002Fp>","\u003Cp>Common causes are an open draft shield, a sample or container warmer than the balance, static charge on a plastic container or powder, nearby vibration, or a sample that is absorbing or losing moisture. A reading that drifts steadily in one direction usually means the sample itself is changing.\u003C\u002Fp>",{"question":217,"answer":218},"\u003Cp>What is taring, and why is it important?\u003C\u002Fp>","\u003Cp>Taring resets the display to zero with your container already on the pan, so the balance then shows only the mass of what you add. It lets you weigh a sample without including the container's weight, and it is why chemicals are never weighed directly on the pan.\u003C\u002Fp>",[],{"slug":221,"title":222,"description":223,"seoTitle":42,"seoDescription":42,"author":116,"createdDate":224,"lastUpdatedDate":153,"draft":46,"category":47,"image":42,"faq":225,"tags":232},"mcfarland-densitometer-parts-principle-and-operation","McFarland Densitometer: Parts, Principle, and Operation","How a McFarland densitometer works: its parts, photometric principle, operation, and calibration. It reads bacterial suspension turbidity directly in McFarland units for susceptibility testing.","2022-11-01",[226,229],{"question":227,"answer":228},"\u003Cp>How does a McFarland densitometer work?\u003C\u002Fp>","\u003Cp>It passes light through a bacterial suspension and measures how much is transmitted. A denser suspension transmits less light, and the instrument converts this into a turbidity reading displayed directly in McFarland units, so no chemical standards need to be prepared.\u003C\u002Fp>",{"question":230,"answer":231},"\u003Cp>What is the difference between a McFarland densitometer and a McFarland standard?\u003C\u002Fp>","\u003Cp>The McFarland standard is a reference suspension of known turbidity (or the target density, such as 0.5). The densitometer is the instrument that measures a suspension's turbidity and reports it in McFarland units, replacing visual comparison against prepared standards.\u003C\u002Fp>",[233],"antimicrobial-susceptibility-testing",{"enabled":235,"threads":236,"total":237},true,[],0,[239,245,251,258,263,268,274,279,285,288,295],{"slug":240,"name":68,"description":241,"image":242,"body":243,"postCount":244},"acharya-tankeshwar","Editor-in-chief","https:\u002F\u002Fassets.microbeonline.com\u002Fauthors\u002Ftankeshwar-acharya-author-microbeonline.jpg","***Tankeshwar Acharya, MSc (Medical Microbiology)***\n\n*Tankeshwar Acharya is an Assistant Professor in the Department of Microbiology at Patan Academy of Health Sciences (PAHS), Nepal, where he has been teaching and practicing clinical microbiology for over 14 years. He is the founder of Microbe Online, one of the leading free microbiology education resources on the web, covering bacteriology, mycology, parasitology, immunology, and clinical laboratory diagnostics written from direct experience in both the classroom and the diagnostic laboratory.*",507,{"slug":246,"name":116,"description":247,"image":248,"body":249,"postCount":250},"ashma-shrestha","SEO Copywriter and Science Communicator\nKathmandu, Nepal","https:\u002F\u002Fassets.microbeonline.com\u002Fauthors\u002Fashma-shrestha.png","Ashma Shrestha holds a Master of Science in Medical Microbiology from the Institute of Science and Technology (IOST), Tribhuvan University, Nepal, where she developed a strong foundation in virology, molecular biology, and diagnostic microbiology.\n\nShe now works as an SEO Copywriter at Resolution Digital, where she combines her scientific training with research-driven content strategy. She is certified in Google Analytics and Google Business Profile (GBP), and brings a data-informed approach to science communication writing content that is not only accurate but structured to reach and serve the students who need it most.\n\nAt microbeonline, Ashma contributes articles primarily in virology and molecular biology, areas she finds most compelling for their mechanistic depth and their growing clinical relevance. Her writing reflects the same standard the site is built on: factual rigor, clear explanation of the *why* behind microbiology concepts, and content that helps students move from memorization to genuine understanding.\n\nShe is passionate about making complex microbiological concepts accessible without sacrificing accuracy; a skill that sits at the intersection of her scientific training and her professional work in content and SEO.",88,{"slug":252,"name":253,"description":254,"image":255,"body":256,"postCount":257},"sushmita-baniya","Sushmita Baniya","Author \u002F Contributor","https:\u002F\u002Fassets.microbeonline.com\u002Fauthors\u002Fsushmita-baniya-1.png","Sushmita Baniya holds an M.Sc. in Medical Microbiology from Tribhuvan University (National College), with a research focus in Genetics and Molecular Biology. She is actively involved in teaching and research in the field of microbiology.",26,{"slug":259,"name":43,"description":254,"image":260,"body":261,"postCount":262},"samikshya-acharya","https:\u002F\u002Fassets.microbeonline.com\u002Fauthors\u002Fsamikshya-acharya.jpeg","Samikshya Sharma completed her postgraduate studies in Medical Microbiology at the Central Department of Microbiology, Tribhuvan University, Nepal. She contributes to Microbeonline with the goal of making foundational and clinical microbiology concepts clear and useful for students in medical, laboratory science, and allied health programs.",20,{"slug":264,"name":265,"description":254,"image":42,"body":266,"postCount":267},"alisha-tripathi","Alisha Tripathi","Alisha Tripathi holds an M.Sc. in Medical Microbiology from National College, Tribhuvan University. With over a year of teaching experience, her academic interests span Molecular Biology, Immunology, and Genetics.",6,{"slug":269,"name":270,"description":271,"image":42,"body":272,"postCount":273},"aastha-shrestha","Aastha Shrestha"," Author \u002F Contributor","Aastha Shrestha is a Biotechnology graduate with an M.Sc. from National College, Tribhuvan University. Her academic interests center on Molecular Biology and Immunology; two fields that are increasingly converging in modern diagnostic and clinical microbiology. \n\nShe contributes to Microbeonline with the goal of making complex concepts in these areas approachable and exam-relevant for students across medical, biotechnology, and laboratory science programs.",9,{"slug":275,"name":276,"description":277,"image":42,"body":42,"postCount":278},"guest-author","Guest Author","Guest Author \u002F Contributor",1,{"slug":280,"name":281,"description":254,"image":282,"body":283,"postCount":284},"srijana-khanal","Srijana Khanal","https:\u002F\u002Fassets.microbeonline.com\u002Fauthors\u002Fsrijana-khanal-1.png","Srijana Khanal is a microbiology educator with nearly a decade of teaching experience, including her role as faculty in the Microbiology Department at National College, NIST. \n\nHer time in the classroom has given her a clear sense of where students struggle and what explanations actually work, a perspective that directly shapes how she writes.\n\nHer academic interests span Immunology, Genetics, Basic Sciences, and Research Methodology, and she brings the same rigor to her writing that she brought to teaching. Alongside academic writing, she has a passion for creative writing -- an instinct that shows in her ability to make dense scientific material readable without sacrificing accuracy.\n\nShe contributes to Microbeonline to extend her teaching reach beyond the classroom, helping medical and laboratory science students across the region build a stronger foundation in microbiology.",15,{"slug":286,"name":287,"description":277,"image":42,"body":42,"postCount":278},"dr-poonam-acharya","Dr. Poonam Acharya",{"slug":289,"name":290,"description":291,"image":292,"body":293,"postCount":294},"nisha-rijal","Nisha Rijal","Microbiologist and AMR Specialist Kathmandu, Nepal","https:\u002F\u002Fassets.microbeonline.com\u002Fauthors\u002Fnisha-rijal-1.png","Nisha Rijal is a microbiologist with nearly 15 years of frontline diagnostic and surveillance experience at the National Public Health Laboratory (NPHL), national reference laboratory under the Department of Health Services, Nepal. She currently works as an AMR Support Officer at the World Health Organization (WHO), Nepal, where her work focuses on strengthening antimicrobial resistance surveillance systems and translating AMR data into actionable public health response.\n\nHer research, published in peer-reviewed journals and cited over 220 times, spans some of the most clinically significant infectious disease challenges in Nepal and South Asia: antimicrobial resistance trends in *Vibrio cholerae* across an 11-year national surveillance dataset, sero-epidemiology of scrub typhus in patients with acute febrile illness, lower respiratory tract infections in HIV-positive patients, and gonococcal resistance surveillance. She was a contributor to Nepal's National Antimicrobial Resistance Containment Action Plan, a foundational policy document for AMR governance in Nepal. You can find list of [Nisha Rijal's article here in Google Scholar.](https:\u002F\u002Fscholar.google.com\u002Fcitations?user=N-Ruq54AAAAJ&hl=en)\n\nThis depth of experience is visible in her writing at Microbeonline. Her 53 published articles cover bacteriology, parasitology, mycology, immunology, and laboratory techniques, and are consistently among the most detailed and clinically grounded content on the site. She brings to every article the same standard that national reference laboratory work demands: methodological precision, awareness of real diagnostic constraints, and an understanding of what results actually mean for patient care in resource-limited settings.\n\nHer areas of particular expertise include antimicrobial susceptibility testing and resistance mechanism detection, quality assurance in clinical microbiology, and laboratory-based infectious disease surveillance.\n\n---\n\n*Nisha Rijal contributes to Microbeonline in a personal capacity. Her views and writing do not represent the positions of the World Health Organization or any other institution.*",55,{"slug":296,"name":297,"description":298,"image":299,"body":300,"postCount":278},"padma-shrestha","Padma Shrestha","Author","https:\u002F\u002Fassets.microbeonline.com\u002Fauthors\u002Fpadma-shrestha.png","Padma Shrestha is from Kathmandu, Nepal. She has completed Masters degree in Medical microbiology from Tribhuvan University. She has great interest in Microbiology and Molecular Biology.",[302,309,315,319,324,329,333,337,341,346,350,354,358,363,368,373,377,381,386,391,395,399,403,407,411,415,419,423,428,433,438,442,446,451,455,459,463,467,471,475,479,483,487,490,494,499,503,506,510,514,518,522,526,530,534,539,543,547,551,555,559,563,567,571,575,579,583,587,590,594,597,600,603,606,609,612,615,618,621,624,627,630,633,636,639,642],{"slug":303,"name":304,"description":305,"image":306,"body":307,"postCount":308},"gram-negative-cocci","Gram-Negative Cocci and Coccobacilli","Neisseria, Moraxella, Haemophilus and related gram-negative coccal organisms","https:\u002F\u002Fassets.microbeonline.com\u002Ftags\u002Fgram-negative-cocci.png","# Gram Negative Cocci\n\nNeisseria gonorrhoeae, Neisseria meningitides, Moraxella catarrhalis, and other Neisseria spp. are clinically relevant gram-negative cocci.\n\nN. gonorrhoeae is the leading cause of sexually transmitted disease whereas N. meningitides is a leading cause of fatal bacterial meningitis.",14,{"slug":310,"name":311,"description":312,"image":42,"body":313,"postCount":314},"microscopy","Microscopy","Microscope types, components, and microscopy techniques","These are list of blog posts related to microscopy. ",12,{"slug":316,"name":317,"description":318,"image":42,"body":42,"postCount":314},"gram-positive-cocci","Gram-Positive Cocci","Staphylococcus, Streptococcus, Enterococcus, Micrococcus — organisms, diseases, and identification tests",{"slug":320,"name":321,"description":322,"image":42,"body":42,"postCount":323},"gram-negative-rods","Gram-Negative Rods (Other than Enterobacteriaceae)","\u003Cp>Gram negative rods other than members of Enterobacteriaceae family such as  Pseudomonas, Acinetobacter and related organisms\u003C\u002Fp>",5,{"slug":325,"name":326,"description":327,"image":42,"body":42,"postCount":328},"gram-positive-rods","Gram-Positive Rods","Bacillus, Clostridium, Listeria, Corynebacterium, Actinomyces and related organisms",8,{"slug":330,"name":331,"description":332,"image":42,"body":42,"postCount":314},"mycobacteria","Mycobacteria","Mycobacterium tuberculosis, leprosy, atypical mycobacteria, and acid-fast organism diagnosis",{"slug":334,"name":335,"description":336,"image":42,"body":42,"postCount":314},"anaerobic-bacteriology","Anaerobic Bacteriology","Anaerobic organisms, anaerobic culture methods, and anaerobic infection diagnosis",{"slug":338,"name":339,"description":340,"image":42,"body":42,"postCount":314},"enterobacteriaceae","Enterobacteriaceae","Identification, differentiation, and clinical significance of Enterobacteriaceae family members",{"slug":342,"name":343,"description":344,"image":42,"body":42,"postCount":345},"spirochetes","Spirochetes","Treponema, Leptospira, Borrelia and spirochetal infections",7,{"slug":347,"name":348,"description":349,"image":42,"body":42,"postCount":308},"food-microbiology","Food Microbiology","Food-borne pathogens, food safety, spoilage, and preservation",{"slug":233,"name":351,"description":352,"image":42,"body":42,"postCount":353},"Antimicrobial Susceptibility Testing","Methods for testing antibiotic susceptibility in clinical microbiology",22,{"slug":355,"name":356,"description":357,"image":42,"body":42,"postCount":308},"antimicrobials-moa-amr","Antimicrobials (MOA & AMR)","Mechanisms, detection, and clinical significance of antimicrobial resistance",{"slug":359,"name":360,"description":361,"image":42,"body":42,"postCount":362},"sterilization-disinfection","Sterilization and Disinfection","Methods of sterilization and disinfection in healthcare and laboratory settings",10,{"slug":364,"name":365,"description":366,"image":42,"body":42,"postCount":367},"specimen-collection-transport","Specimen Collection and Transport","Collection, handling, and transport of clinical specimens for microbiological testing",27,{"slug":369,"name":370,"description":371,"image":42,"body":42,"postCount":372},"bacterial-structure-physiology","Bacterial Structure and Physiology","Bacterial cell structure, growth, physiology, and environmental factors affecting growth",21,{"slug":374,"name":375,"description":42,"image":42,"body":376,"postCount":267},"horizontal-gene-transfer","Horizontal Gene Transfer","Articles related to **Horizontal Gene Transfer**",{"slug":378,"name":379,"description":42,"image":42,"body":380,"postCount":362},"chromatography","Chromatography","Information about chromatographic techniques.",{"slug":382,"name":383,"description":384,"image":42,"body":385,"postCount":345},"electrophoresis","Electrophoresis","Information about Electrophoresis Techniques ","Detailed information  about Electrophoresis Techniques ",{"slug":387,"name":388,"description":389,"image":42,"body":390,"postCount":267},"pcr-techniques","PCR Techniques","Information about various types of Polymerase Chain Reaction Techniques ","More detailed information about various types of Polymerase Chain Reaction Techniques ",{"slug":392,"name":393,"description":394,"image":42,"body":42,"postCount":267},"bacteriophage","Bacteriophage","Description about Bacteriophage.",{"slug":396,"name":397,"description":398,"image":42,"body":42,"postCount":267},"malaria","Malaria","It is the collections of articles regarding malarial disease. ",{"slug":400,"name":401,"description":402,"image":42,"body":42,"postCount":267},"anaerobic-culture-techniques","Anaerobic Culture Techniques","Posts related with Anaerobic Culture Techniques.",{"slug":404,"name":405,"description":406,"image":42,"body":42,"postCount":372},"immunoassays","Immunoassays","You will get information about all the diagnostic tests that rely on the specific binding between an antigen and an antibody to detect or quantify a substance.",{"slug":408,"name":409,"description":410,"image":42,"body":42,"postCount":345},"biosafety-levels","Biosafety levels ","Articles related to Biosafety Levels",{"slug":412,"name":413,"description":414,"image":42,"body":42,"postCount":323},"environmental-factors","Environmental Factors ","In this case we are talking about growth requirements of microorganisms with deep dive in environmental factors that affect the growth. ",{"slug":416,"name":417,"description":418,"image":42,"body":42,"postCount":267},"pipette","Pipette","Posts related with Pipette. ",{"slug":420,"name":421,"description":422,"image":42,"body":42,"postCount":345},"bacteriology-mcqs","Bacteriology MCQs","This sections lists MCQs in Bacteriology.",{"slug":424,"name":425,"description":426,"image":42,"body":42,"postCount":427},"parasitology-mcqs","Parasitology MCQs","This section lists MCQs in Parasitology.",2,{"slug":429,"name":430,"description":431,"image":42,"body":42,"postCount":432},"virology-mcqs","Virology MCQs","This is the collections of Multiple Choice Questions in Virology.",4,{"slug":434,"name":435,"description":436,"image":42,"body":42,"postCount":437},"mcqs-in-microbiology","MCQs in Microbiology","This section lists the collections of Multiple Choice Questions in General Microbiology Topics. ",3,{"slug":439,"name":440,"description":441,"image":42,"body":42,"postCount":345},"immunology-mcqs","Immunology MCQs","In this section; we are posting collections of Multiple Choice Questions about Immunology. ",{"slug":443,"name":444,"description":445,"image":42,"body":42,"postCount":362},"microbial-curiosities","Microbial Curiosities","In this clusters, we are posting interesting and unique information about Microorganisms. ",{"slug":447,"name":448,"description":449,"image":42,"body":42,"postCount":450},"bacterial-culture-media","Bacterial Culture Media","Posts related to Bacterial Culture Media. ",23,{"slug":452,"name":453,"description":454,"image":42,"body":42,"postCount":267},"fungal-culture-media","Fungal Culture Media","Posts related to Fungal Culture Media.",{"slug":456,"name":457,"description":458,"image":42,"body":42,"postCount":323},"motility-test","Motility Test","This lists the procedure regarding various tests methods for bacterial motility.",{"slug":460,"name":461,"description":462,"image":42,"body":42,"postCount":362},"bacterial-enumeration","Bacterial enumeration","These posts are related to isolation and enumeration of bacteria. ",{"slug":464,"name":465,"description":466,"image":42,"body":42,"postCount":427},"gram-positive-coccobacillus","Gram-positive coccobacillus","List of Gram Positive Coccobacilli",{"slug":468,"name":469,"description":470,"image":42,"body":42,"postCount":432},"dimorphic-fungi","Dimorphic Fungi","This is about various dimorphic fungi. ",{"slug":472,"name":473,"description":474,"image":42,"body":42,"postCount":345},"bacterial-classification","Bacterial Classification","These posts are related with various approaches used for the classification of Bacteria. ",{"slug":476,"name":477,"description":478,"image":42,"body":42,"postCount":323},"immunofluorescence","Immunofluorescence ","Various Tests related to Immunofluorescence ",{"slug":480,"name":481,"description":482,"image":42,"body":42,"postCount":273},"antibody-mediated-immunity","Antibody-mediated Immunity","This clusters links the articles that are sharing insights about Antibody-mediated immunity. ",{"slug":484,"name":485,"description":486,"image":42,"body":42,"postCount":345},"hypersensitivity","Hypersensitivity","Articles related to Hypersensitivity.",{"slug":488,"name":489,"description":42,"image":42,"body":42,"postCount":437},"haemophilus","Haemophilus",{"slug":491,"name":492,"description":493,"image":42,"body":42,"postCount":267},"sexually-transmitted-infections-stis","Sexually transmitted infections (STIs)","This is the clusters of infections that are transmitted sexually. ",{"slug":495,"name":496,"description":497,"image":42,"body":42,"postCount":498},"adaptive-immunity","Adaptive Immunity","Blog posts related to B Cell Immunity and T Cell Immunity.",13,{"slug":500,"name":501,"description":502,"image":42,"body":42,"postCount":308},"fungal-diagnostics","Fungal Diagnostics","Various methods used for the Diagnosis of Fungal Infections. ",{"slug":88,"name":504,"description":505,"image":42,"body":42,"postCount":323},"Laboratory Storage and Preservation","Articles about Laboratory Storage of Antimicrobial Disk, Test organisms and Equipment used for this process. ",{"slug":171,"name":507,"description":508,"image":42,"body":509,"postCount":267},"Laboratory Heating Equipment","A guide to laboratory heating equipment, including hot plates, water baths, Bunsen burners, incubators, and dry baths, and how to choose the right one for each task.","Laboratory heating equipment covers the instruments that warm, melt, incubate, or sterilize samples and media in a microbiology laboratory. Each one delivers heat differently. \n\nA hot plate gives high, direct, dry heat; a water bath gives gentle, even, wet heat up to about 100°C; a Bunsen burner gives an open flame for rapid, very high heat; an incubator holds cultures at a steady temperature over hours or days; and a dry bath heats small tubes without water. Choosing the right one depends on the temperature you need, how precise it must be, and whether the sample can tolerate direct or open-flame heat.\n\nThe articles below cover each piece of heating equipment in detail, including its parts, working principle, uses, and the mistakes that most often go wrong at the bench.",{"slug":511,"name":512,"description":513,"image":42,"body":42,"postCount":273},"laboratory-glassware","Laboratory Glassware","Posts about Laboratory Glassware. ",{"slug":515,"name":516,"description":517,"image":42,"body":42,"postCount":273},"helminths","Helminths","In this section, we are covering properties, life cycle, pathogenesis and laboratory diagnosis of Helminths\u002FHelminthic infestations. ",{"slug":519,"name":520,"description":521,"image":42,"body":42,"postCount":267},"protozoan-parasite","Protozoan Parasite","In this cluster, we are covering protozoan parasites. ",{"slug":523,"name":524,"description":525,"image":42,"body":42,"postCount":278},"tests-for-gram-positive-cocci","Biochemical Tests for Gram Positive Cocci","This is the lists of Biochemical Tests that are used for Gram Positive Cocci. ",{"slug":527,"name":528,"description":529,"image":42,"body":42,"postCount":362},"bacterial-staining-technique","Bacterial Staining Technique","Lists of various staining techniques that are used to stain bacteria. ",{"slug":531,"name":532,"description":533,"image":42,"body":42,"postCount":372},"enzyme-tests","Enzyme Tests","\u003Cp>Various Biochemical Test that are based on enzymatic activity of the microorganisms. \u003C\u002Fp>",{"slug":535,"name":536,"description":537,"image":42,"body":42,"postCount":538},"carbohydrate-utilization","Carbohydrate Utilization","\u003Cp>Various biochemical tests which are related to Carbohydrate fermentation or Utilization\u003C\u002Fp>",11,{"slug":540,"name":541,"description":542,"image":42,"body":42,"postCount":323},"susceptibility-based-id","Susceptibility-based ID","\u003Cp>These are susceptibility based identification test such as optochin sensitivity, bacitracin sensitivity etc. \u003C\u002Fp>",{"slug":544,"name":545,"description":546,"image":42,"body":42,"postCount":432},"microbial-metabolism","Microbial Metabolism","\u003Cp>Tests about Microbial Metabolism. \u003C\u002Fp>",{"slug":548,"name":549,"description":550,"image":42,"body":42,"postCount":328},"substrate-utilization","Substrate Utilization","\u003Cp>The test in which a non-sugar carbon\u002Fnitrogen source is used or degraded (citrate, malonate, decarboxylases, indole, PAD).\u003C\u002Fp>",{"slug":552,"name":553,"description":554,"image":42,"body":42,"postCount":437},"atypical-pneumonia","Atypical Pneumonia","\u003Cp>Organisms responsible for Atypical Pneumonia. \u003C\u002Fp>",{"slug":556,"name":557,"description":558,"image":42,"body":42,"postCount":323},"antigen","Antigen","\u003Cp>Various articles related to Antigens.\u003C\u002Fp>",{"slug":560,"name":561,"description":562,"image":42,"body":42,"postCount":345},"innate-immunity","Innate Immunity","\u003Cp>Articles related to Innate Immunity. \u003C\u002Fp>",{"slug":564,"name":565,"description":566,"image":42,"body":42,"postCount":432},"respiratory-tract-infection","Respiratory Tract Infection","\u003Cp>In this cluster, you can see various etiological agents that causes respiratory tract infection. \u003C\u002Fp>",{"slug":568,"name":569,"description":570,"image":42,"body":42,"postCount":323},"torch-infection","TORCH Infection","\u003Cp>In this section; you can find articles related with TOCH infection. \u003C\u002Fp>",{"slug":572,"name":573,"description":574,"image":42,"body":42,"postCount":328},"microbiology-for-beginners","Microbiology for Beginners","\u003Cp>These articles are very basic articles, which will share general concepts in Microbiology. \u003C\u002Fp>",{"slug":576,"name":577,"description":578,"image":42,"body":42,"postCount":267},"dna-replication","DNA Replication","\u003Cp>Articles related to DNA and Replication of DNA. \u003C\u002Fp>",{"slug":580,"name":581,"description":582,"image":42,"body":42,"postCount":267},"genetic-code","Genetic Code","\u003Cp>Articles related to Genetic Code.\u003C\u002Fp>",{"slug":584,"name":585,"description":586,"image":42,"body":42,"postCount":345},"molecular-technique","Molecular Technique","\u003Cp>Posts related to Molecular Techniques. \u003C\u002Fp>",{"slug":588,"name":589,"description":42,"image":42,"body":42,"postCount":278},"colorimetric-assay","Colorimetric Assay ",{"slug":591,"name":592,"description":593,"image":42,"body":42,"postCount":323},"pharmaceutical-microbiology","Pharmaceutical Microbiology","\u003Cp>Various articles related to Pharmaceutical Microbiology\u003C\u002Fp>",{"slug":595,"name":596,"description":42,"image":42,"body":42,"postCount":437},"blood-and-immune-cells","Blood and Immune Cells",{"slug":598,"name":599,"description":42,"image":42,"body":42,"postCount":323},"host-pathogen-interaction","Host Pathogen Interaction",{"slug":601,"name":602,"description":42,"image":42,"body":42,"postCount":432},"blood-culture","Blood Culture",{"slug":604,"name":605,"description":42,"image":42,"body":42,"postCount":432},"environmental-microbiology","Environmental microbiology ",{"slug":607,"name":608,"description":42,"image":42,"body":42,"postCount":345},"copromicroscopic-technique","Copromicroscopic Technique",{"slug":610,"name":611,"description":42,"image":42,"body":42,"postCount":437},"quality-control","Quality Control",{"slug":613,"name":614,"description":42,"image":42,"body":42,"postCount":345},"dermatophytes","Dermatophytes",{"slug":616,"name":617,"description":42,"image":42,"body":42,"postCount":437},"viral-hemorrhagic-fevers","Viral Hemorrhagic Fevers",{"slug":619,"name":620,"description":42,"image":42,"body":42,"postCount":432},"h2s-production","H2S Production",{"slug":622,"name":623,"description":42,"image":42,"body":42,"postCount":427},"water-quality-testing","Water Quality Testing",{"slug":625,"name":626,"description":42,"image":42,"body":42,"postCount":323},"virology-basics","Virology basics",{"slug":628,"name":629,"description":42,"image":42,"body":42,"postCount":432},"typing-methods","Typing Methods",{"slug":631,"name":632,"description":42,"image":42,"body":42,"postCount":437},"blotting-technique","Blotting Technique",{"slug":634,"name":635,"description":42,"image":42,"body":42,"postCount":432},"history-microbiology","History of Microbiology",{"slug":637,"name":638,"description":42,"image":42,"body":42,"postCount":267},"trematodes","Trematodes",{"slug":640,"name":641,"description":42,"image":42,"body":42,"postCount":432},"coccidian-parasites","Coccidian Parasites",{"slug":643,"name":644,"description":645,"image":42,"body":42,"postCount":308},"cell-structure","Cell Structure","\u003Cp>Articles related to Cell Structure. \u003C\u002Fp>"]