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Does the lab look messy? Medicines and equipment should be arranged like this
The laboratory often has a lot of drugs, instruments and so on. A lot of these things, it is easy to make the laboratory appear crowded and messy. Laboratory once mess up, it will have an effect on the experiment, how to deal with this problem today, HUIDA will tell you a few tips to ~Chemistry LABS...Read more -
The counting and culturing procedures for colony counting
Dilution of sample Culture and counting Results and ReportsDilution of sampleSolid and semisolid samplesWeigh 25g into a sterile homogenizing cup containing 225 mL phosphate buffer or normal saline and homogenize at 8000 r/min to 10000 r/min for 1min to 2min, or put it into a sterile homogenizing ba...Read more -
Laboratory chemical analysis instrument operation skills summary (3)
E.Pipette, volumetric flask and buret1. PipetteA pipette is used to measure a certain volume of solution accurately. It is a glass tube with an enlarged part (called the ball) in the middle and a line marked on the upper part of the neck. The line is calibrated according to the volume released. Ther...Read more -
Laboratory chemical analysis instrument operation skills summary (2)
Laboratory chemical analysis instrument operation skills summary (2)D.Solution and precipitation separationSolution and precipitation can be separated by three methods: decanting, filtration and centrifugation.1. The decanting methodWhen the density of precipitation or crystallization of larger part...Read more -
Laboratory chemical analysis instrument operation skills summary! (1)
Laboratory chemical analysis instrument operation skills summary! (1)Daily laboratory operation skills, hope to give you help!A.Glass instrument washingWashing methods are summarized as follows:1. Scrub with water:It can wash the soluble material and make the dust attached to the instrument elute do...Read more -
Inoculation, culture, isolation, purification, identification and preservation of microorganisms
Inoculation, culture, isolation, purification, identification and preservation of microorganismsInoculationThe process of attaching a microorganism to an artificial medium or to a living organism suitable for its growth and propagation is called inoculation.Inoculation and separation tools1. Inocula...Read more -
Summary of microbe sampling, sample preparation techniques and dilution, inoculation and culture met
Summary of microbe sampling, sample preparation techniques and dilution, inoculation and culture methods!(2)1.Inoculation method of sample solution:1.1. Pull out the suction tube along the upper wall of the tube, blow and wash the suction ear ball beside the flame, insert the suction ear ball at the...Read more -
Summary of microbe sampling, sample preparation techniques and dilution, inoculation and culture met
Summary of microbe sampling, sample preparation techniques and dilution, inoculation and culture methods!(1) 1.Sampling preparation1.1. When sampling, the sample must be representative of the product.Frozen samples retrieved from the workshop should be thawed as required, dry food can be placed in t...Read more -
Use of extraction and separation funnel
Use of extraction and separation funnel Extraction is one of the common operations for separating and purifying organic compounds. The application of extraction allows the extraction of desired substances from liquid or solid mixtures, the former called “liquid-liquid extraction” and the latter call...Read more -
How to use separatory funnel?
How to use separatory funnel?The main purpose of the separatory funnel:①Separate two liquids that are stratified and do not react②Extract a certain component from the solution③Wash the product with water or alkali or acid④ Replace the dropping funnel and add reagents dropwisePoints to note when usin...Read more -
Distracted by these “little troubles” in the laboratory? Look here, there are good ideas!
Distracted by these “little troubles” in the laboratory? Look here, there are good ideas!In the laboratory, in addition to the first problem “washing the bottle”, everyone often encounters some large and small problems, such as the bottle stopper sticking and not opening, emulsification during liqui...Read more -
The correct way of using the measuring pipette
The correct way of using the Volumetric PipetteAbstract: Volumetric Pipette is a gauge used to accurately move a certain volume of solution. A Volumetric Pipette is a dispensing instrument used only to measure the volume of the solution it releases. It is a long, thin glass tube with an expanded par...Read more
