presentation on Pipetts for Laboratory Technologist/Molecular Biologist/Microbiologist and researchers.
This is very basic lecture to understand the uses of the pipetts and their techniques.
so please review this lecture and enjoy
This document provides guidance on proper pipetting technique. It defines different types of pipets and emphasizes the importance of accuracy in laboratory analysis. Key steps for good pipetting include pre-checking pipets for defects, holding the pipet vertically when filling to the calibration line, avoiding splashing when dispensing, and thoroughly cleaning pipets after each use according to standard operating procedures. Maintaining consistent pipetting technique is crucial for obtaining reliable data.
Pippettes are an essential component in fetching the accurate lab results,.... maintaining the accuracy and precision while dipensing reamins the mainstay of valid results in any test performed whether ELISA, DNA extraction Vitek, MALDI-ToF
Viruses are important because they can cause disease in animals and humans. They come in a variety of shapes and sizes depending on their composition. There are two main types of viral structures - icosahedral and helical. Icosahedral viruses have a spherical protein shell with either a naked capsid or an envelope, while helical viruses have a long cylindrical shape and are always enveloped. Understanding viral structure is key to developing treatments like vaccines and diagnosing viral diseases.
This document discusses various laboratory equipment and wares. It begins by describing different types of laboratory glasswares and plasticwares used for measuring, pipetting, transferring, storage, and preparation of reagents. It then discusses various pieces of laboratory equipment in more detail, including microscopes, balances, refrigerators, ovens, water baths, incubators, centrifuges, autoclaves, colorimeters, mixers, and pH meters. It emphasizes the importance of properly cleaning and caring for laboratory equipment and wares.
this topic is represent the types of the plasticware. which is used in the chemical and environmental practical lab. that instruments is made by the plastics and introduction about that instrument.
Medical Laboratory technology Lab Manual for MLT students Vamsi kumar
MLT II lab manual for MLT students
Demonstration of working of spectrophotometer
Demonstration of maintenance of equipments and reagents
Sample formats for reporting test result
Demonstration of policies and procedures for infection control
Demonstration of mock diagnostic lab for learning & understanding patients right
Demonstration of mock environment to learn and understand conducive patient environment
Collection and handling of specimen for histopathology/cytopathology examination
Demonstration of working of Microtome
Demonstration of sharpening methods of microtome knife
Demonstration of tissue processing
Demonstration of PAP staining
Demonstration of PAS staining
Collection and handling of specimen for cytopathology examination
Demonstration of Mounting technique Demonstration of Mounting technique
Demonstration of maintaining record of inventory, test results etc
Types of pipettes and its applications
Micropipettes are utilized in the laboratory to transfer small quantities of liquid, usually down to 0.1 uL. They are most commonly used in chemistry, biology, forensic, pharmaceutical, and drug discovery labs, among other .
A pipette (also called a point or a pipettor) is a laboratory instrument used to transfer a measured volume of liquid.
Pipettes are commonly used in chemistry and molecular biology research as well as clinical biochemistry tests.
Pipettes come in several designs for various purposes with different levels of accuracy and precision, from single piece flexible plastic transfer pipettes to more complex adjustable or electronic pipettes.
A pipette works by creating a vacuum above the liquid-holding chamber and selectively releasing this vacuum to draw and dispense liquid.
This document provides guidance on proper pipetting technique. It defines different types of pipets and emphasizes the importance of accuracy in laboratory analysis. Key steps for good pipetting include pre-checking pipets for defects, holding the pipet vertically when filling to the calibration line, avoiding splashing when dispensing, and thoroughly cleaning pipets after each use according to standard operating procedures. Maintaining consistent pipetting technique is crucial for obtaining reliable data.
Pippettes are an essential component in fetching the accurate lab results,.... maintaining the accuracy and precision while dipensing reamins the mainstay of valid results in any test performed whether ELISA, DNA extraction Vitek, MALDI-ToF
Viruses are important because they can cause disease in animals and humans. They come in a variety of shapes and sizes depending on their composition. There are two main types of viral structures - icosahedral and helical. Icosahedral viruses have a spherical protein shell with either a naked capsid or an envelope, while helical viruses have a long cylindrical shape and are always enveloped. Understanding viral structure is key to developing treatments like vaccines and diagnosing viral diseases.
This document discusses various laboratory equipment and wares. It begins by describing different types of laboratory glasswares and plasticwares used for measuring, pipetting, transferring, storage, and preparation of reagents. It then discusses various pieces of laboratory equipment in more detail, including microscopes, balances, refrigerators, ovens, water baths, incubators, centrifuges, autoclaves, colorimeters, mixers, and pH meters. It emphasizes the importance of properly cleaning and caring for laboratory equipment and wares.
this topic is represent the types of the plasticware. which is used in the chemical and environmental practical lab. that instruments is made by the plastics and introduction about that instrument.
Medical Laboratory technology Lab Manual for MLT students Vamsi kumar
MLT II lab manual for MLT students
Demonstration of working of spectrophotometer
Demonstration of maintenance of equipments and reagents
Sample formats for reporting test result
Demonstration of policies and procedures for infection control
Demonstration of mock diagnostic lab for learning & understanding patients right
Demonstration of mock environment to learn and understand conducive patient environment
Collection and handling of specimen for histopathology/cytopathology examination
Demonstration of working of Microtome
Demonstration of sharpening methods of microtome knife
Demonstration of tissue processing
Demonstration of PAP staining
Demonstration of PAS staining
Collection and handling of specimen for cytopathology examination
Demonstration of Mounting technique Demonstration of Mounting technique
Demonstration of maintaining record of inventory, test results etc
Types of pipettes and its applications
Micropipettes are utilized in the laboratory to transfer small quantities of liquid, usually down to 0.1 uL. They are most commonly used in chemistry, biology, forensic, pharmaceutical, and drug discovery labs, among other .
A pipette (also called a point or a pipettor) is a laboratory instrument used to transfer a measured volume of liquid.
Pipettes are commonly used in chemistry and molecular biology research as well as clinical biochemistry tests.
Pipettes come in several designs for various purposes with different levels of accuracy and precision, from single piece flexible plastic transfer pipettes to more complex adjustable or electronic pipettes.
A pipette works by creating a vacuum above the liquid-holding chamber and selectively releasing this vacuum to draw and dispense liquid.
This document discusses different types of glassware used in laboratories, including non-volumetric glassware like beakers and flasks, and volumetric glassware like graduated cylinders and volumetric flasks. It describes the purposes and proper uses of pipettes, including volumetric, Mohr, and serological pipettes as well as mechanical pipettes. The document provides guidance on correctly reading pipette volumes and using pipettes and glassware properly.
Automation in biochemistry refers to using instruments to perform biochemical tests with minimal human involvement. Automated systems can perform many steps like sample handling, reagent addition, reaction incubation, and measurement that were previously done manually. The main types of automated analyzers are continuous flow analyzers, discrete autoanalyzers, and random access analyzers. Continuous flow analyzers pass samples and reagents sequentially through a single analytical pathway. Discrete autoanalyzers separate each sample and reagent in individual containers, allowing multiple tests per sample. Random access analyzers perform tests on batches of samples, selecting tests for each sample. Automated systems provide benefits like higher throughput, reduced variability, and less manual labor, but also have high initial costs.
The document lists various instruments and equipment used in a blood bank laboratory, including personal protective equipment to protect workers, instruments for measuring and transferring liquids, equipment for separating blood components like centrifuges, refrigerators and freezers for storing blood and its components, microscopes, and waste segregation materials. It describes the uses of common lab equipment like test tubes, pipettes, balances, and autoclaves. Protective equipment and carefully measuring and storing blood are essential aspects of working in a blood bank laboratory.
The document provides information about viruses, including their structure, classification, and life cycles. It describes that viruses are non-living particles composed of genetic material and protein that can infect host cells. Viruses come in different shapes and sizes, and some have envelopes while others do not. They are classified based on their genetic material and hosts. The document also explains the lytic and lysogenic life cycles of bacteriophages and how they reproduce and infect bacterial cells.
Automated analyzers have advanced diagnostic testing by increasing efficiency and accuracy while reducing human error. There are four basic approaches to automated analyzers: continuous flow analyzers, centrifugal analyzers, discrete auto analyzers, and dry chemical analyzers. Each type has its own principles and advantages such as processing multiple samples simultaneously, using small sample volumes, and eliminating manual steps. Automated analyzers have improved healthcare by providing faster, higher quality, and more standardized test results.
To maximize sensitivity of diagnostic testing, specimens should be stored frozen at -70°C and shipped on dry ice, with some exceptions. Specimens that will be evaluated within 1-2 days can be refrigerated at 4°C. Fixed tissues can be stored and shipped at room temperature. Blood specimens should not be stored overnight. Proper storage temperatures help preserve specimens until testing.
Hematology analyzers are automated machines that can count and classify the different types of blood cells through various techniques such as flow cytometry, fluorescent dyes, electrical impedance, light scattering, and radiofrequency. They provide precise and accurate cell counts, as well as additional data like hemoglobin and platelet levels, that are collectively known as a complete blood count. The automated counts eliminate errors associated with manual counting and can process over 100 samples per hour, aiding in medical specialties like internal medicine and oncology.
The document discusses hematology analyzers, which are automated machines that can count and identify blood cells quickly and accurately. It describes the working principles of hematology analyzers such as flow cytometry, fluorescent dyes, electrical impedance, optical scatter, and radiofrequency. The document also outlines the types of results provided, types of analyzers, their uses, advantages like speed and accuracy, and disadvantages like high costs.
Responsibilities of Clinical Laboratory Scientist and TechniciansBest care Lab
Laboratory science, being the vital element of the medical industry, a medical laboratory and its technicians play a great role in it. In general medical laboratory scientists and medical laboratory technicians collect samples and perform the tests to analyze body fluids, tissue, and other substances.
The document provides an overview and maintenance guide for the Waters Xevo TQ-XS Mass Spectrometry System. It includes general information such as copyright notices, safety considerations, and instructions for operating and maintaining the device. The document discusses the system's components, software, ionization techniques, and quality control procedures. It also provides EMC compliance information and contact details for Waters Corporation.
The document provides an overview of phlebotomy, including the roles and responsibilities of phlebotomists, safety precautions for handling blood and needles, anatomy related to blood collection, equipment used in blood collection, and proper procedures for collecting blood samples from patients. It describes the importance of identifying patients correctly, taking standard precautions, and positioning patients comfortably to facilitate successful blood draws with minimal risk of complications or exposure to blood-borne pathogens.
Karl Landsteiner began studying blood groups in 1900 and determined that blood group is genetic. The ABO blood group system categorizes blood into four main types - A, B, AB, and O - based on the presence or absence of antigens on red blood cells. Before transfusions, it is crucial to determine blood type compatibility to avoid dangerous transfusion reactions. The Rh system further distinguishes blood as either Rh-positive or Rh-negative depending on the presence of the Rh factor, and compatibility must account for both ABO and Rh types.
This document provides information on clinical pathology techniques including hematology, clinical chemistry, and cytology. It discusses components of a complete blood count, hematologic techniques like calculating packed cell volume and total leukocyte concentration, examining blood films, and cell counting with automated instrumentation. Key learning objectives covered are understanding hematologic tests, calculations, sample handling, and interpreting results.
This document describes several methods for enumerating or counting bacteria in a sample, including viable plate count, direct microscopic count, and turbidity count. The viable plate count method involves making serial dilutions of a sample and counting the number of colonies that grow on an agar plate, then multiplying by the dilution factor to determine the concentration in the original sample. The direct microscopic count uses a counting chamber to directly view and count bacteria under a microscope. The turbidity count uses spectrophotometry to measure the turbidity or cloudiness of diluted samples, which correlates to the number of bacteria present based on a generated standard curve. Procedures for each method are provided.
A funnel is a tube or pipe that is wide at the top and narrow at the bottom, used to guide liquids or powders into small openings. Funnels are commonly made of stainless steel, aluminum, glass, or plastic. There are several types of specialized funnels including filter funnels for separating solids from liquids, powder funnels for transferring powders, and separatory funnels for separating mixtures into immiscible solvent phases. Other types include Büchner funnels for vacuum filtration, dropping funnels for slow reagent addition, and eco funnels designed to reduce chemical contamination.
Haemocytometry is a technique used to count blood cells and cells in other body fluids. It involves diluting a blood or fluid sample and counting the cells in a special counting chamber under a microscope. The total white blood cell count, platelet count, and absolute eosinophil count can be determined through haemocytometry. Precise dilution and counting technique is required to obtain accurate results, which provide information about a patient's health status and response to treatment.
This document provides information on laboratory glassware and plasticware, including their types, care, and uses. It discusses the characteristics of borosilicate glass used to manufacture glassware and lists precautions for handling glassware. Various types of volumetric wares like pipettes, flasks, burettes, and cylinders are described. Recommendations are provided for cleaning glassware and plasticware to ensure they are thoroughly cleaned and free of contamination.
Two main types of deionizers are two-bed and mixed-bed deionizers. Two-bed deionizers have separate cation and anion exchange resin beds, while mixed-bed deionizers intimately mix the resins. Both work by exchanging ions in water for hydrogen and hydroxyl ions using ion exchange resins, producing high purity deionized water free of ionic contaminants. Common applications of deionized water include use in laboratories, pharmaceuticals, chemicals, power plants, and other industrial processes requiring high purity water.
Platelet count and hematocrit determination methodsNegash Alamin
1. The document describes the principles, procedures, and clinical significance of platelet count and hematocrit determination methods. Platelet count involves diluting blood with ammonium oxalate and counting platelets under a microscope, while hematocrit involves filling a capillary tube with blood and centrifuging it to measure the ratio of red blood cells to plasma.
2. Both tests help diagnose bleeding, clotting, and anemia issues by checking platelet and red blood cell levels. Abnormally high or low counts can indicate conditions like blood cancers, blood loss, kidney disease, or dehydration. Precise methods and calculations are required to obtain accurate results.
Basic to Medical laboratory science C4.pptxBisratBogale2
Here are the key points in response to the review questions:
1. Volumetric equipment like pipettes provide accurate and precise volumes which is important for preparing standard solutions, controls and samples where the concentration needs to be known. Using calibrated pipettes avoids errors from imprecise manual volume measurements.
2. Pipettes can lose calibration over time with use due to wear and minor damage, so they need to be verified periodically like every 6-12 months. Re-calibration ensures the volumes dispensed are still within the required accuracy and precision specifications for the intended use.
3. Methods to verify pipette calibration include gravimetric testing by pipetting water and weighing replicates to calculate mean, standard deviation and coefficient of variation
This document provides an introduction to common glassware and equipment used in labs, including:
1. Glassware like volumetric flasks, pipettes, burettes, and graduated cylinders are used to accurately measure volumes of solutions. Clean glassware is essential for accurate work.
2. Volumetric flasks come in different sizes and are used to make solutions of a precise volume. Solutions are added until the meniscus is at the marked line.
3. Pipettes like Mohr pipettes are used to accurately measure small volumes of liquids. They are filled and emptied through a bulb system to control flow.
4. Burettes are used for titrations to deliver reactants in
This document discusses different types of glassware used in laboratories, including non-volumetric glassware like beakers and flasks, and volumetric glassware like graduated cylinders and volumetric flasks. It describes the purposes and proper uses of pipettes, including volumetric, Mohr, and serological pipettes as well as mechanical pipettes. The document provides guidance on correctly reading pipette volumes and using pipettes and glassware properly.
Automation in biochemistry refers to using instruments to perform biochemical tests with minimal human involvement. Automated systems can perform many steps like sample handling, reagent addition, reaction incubation, and measurement that were previously done manually. The main types of automated analyzers are continuous flow analyzers, discrete autoanalyzers, and random access analyzers. Continuous flow analyzers pass samples and reagents sequentially through a single analytical pathway. Discrete autoanalyzers separate each sample and reagent in individual containers, allowing multiple tests per sample. Random access analyzers perform tests on batches of samples, selecting tests for each sample. Automated systems provide benefits like higher throughput, reduced variability, and less manual labor, but also have high initial costs.
The document lists various instruments and equipment used in a blood bank laboratory, including personal protective equipment to protect workers, instruments for measuring and transferring liquids, equipment for separating blood components like centrifuges, refrigerators and freezers for storing blood and its components, microscopes, and waste segregation materials. It describes the uses of common lab equipment like test tubes, pipettes, balances, and autoclaves. Protective equipment and carefully measuring and storing blood are essential aspects of working in a blood bank laboratory.
The document provides information about viruses, including their structure, classification, and life cycles. It describes that viruses are non-living particles composed of genetic material and protein that can infect host cells. Viruses come in different shapes and sizes, and some have envelopes while others do not. They are classified based on their genetic material and hosts. The document also explains the lytic and lysogenic life cycles of bacteriophages and how they reproduce and infect bacterial cells.
Automated analyzers have advanced diagnostic testing by increasing efficiency and accuracy while reducing human error. There are four basic approaches to automated analyzers: continuous flow analyzers, centrifugal analyzers, discrete auto analyzers, and dry chemical analyzers. Each type has its own principles and advantages such as processing multiple samples simultaneously, using small sample volumes, and eliminating manual steps. Automated analyzers have improved healthcare by providing faster, higher quality, and more standardized test results.
To maximize sensitivity of diagnostic testing, specimens should be stored frozen at -70°C and shipped on dry ice, with some exceptions. Specimens that will be evaluated within 1-2 days can be refrigerated at 4°C. Fixed tissues can be stored and shipped at room temperature. Blood specimens should not be stored overnight. Proper storage temperatures help preserve specimens until testing.
Hematology analyzers are automated machines that can count and classify the different types of blood cells through various techniques such as flow cytometry, fluorescent dyes, electrical impedance, light scattering, and radiofrequency. They provide precise and accurate cell counts, as well as additional data like hemoglobin and platelet levels, that are collectively known as a complete blood count. The automated counts eliminate errors associated with manual counting and can process over 100 samples per hour, aiding in medical specialties like internal medicine and oncology.
The document discusses hematology analyzers, which are automated machines that can count and identify blood cells quickly and accurately. It describes the working principles of hematology analyzers such as flow cytometry, fluorescent dyes, electrical impedance, optical scatter, and radiofrequency. The document also outlines the types of results provided, types of analyzers, their uses, advantages like speed and accuracy, and disadvantages like high costs.
Responsibilities of Clinical Laboratory Scientist and TechniciansBest care Lab
Laboratory science, being the vital element of the medical industry, a medical laboratory and its technicians play a great role in it. In general medical laboratory scientists and medical laboratory technicians collect samples and perform the tests to analyze body fluids, tissue, and other substances.
The document provides an overview and maintenance guide for the Waters Xevo TQ-XS Mass Spectrometry System. It includes general information such as copyright notices, safety considerations, and instructions for operating and maintaining the device. The document discusses the system's components, software, ionization techniques, and quality control procedures. It also provides EMC compliance information and contact details for Waters Corporation.
The document provides an overview of phlebotomy, including the roles and responsibilities of phlebotomists, safety precautions for handling blood and needles, anatomy related to blood collection, equipment used in blood collection, and proper procedures for collecting blood samples from patients. It describes the importance of identifying patients correctly, taking standard precautions, and positioning patients comfortably to facilitate successful blood draws with minimal risk of complications or exposure to blood-borne pathogens.
Karl Landsteiner began studying blood groups in 1900 and determined that blood group is genetic. The ABO blood group system categorizes blood into four main types - A, B, AB, and O - based on the presence or absence of antigens on red blood cells. Before transfusions, it is crucial to determine blood type compatibility to avoid dangerous transfusion reactions. The Rh system further distinguishes blood as either Rh-positive or Rh-negative depending on the presence of the Rh factor, and compatibility must account for both ABO and Rh types.
This document provides information on clinical pathology techniques including hematology, clinical chemistry, and cytology. It discusses components of a complete blood count, hematologic techniques like calculating packed cell volume and total leukocyte concentration, examining blood films, and cell counting with automated instrumentation. Key learning objectives covered are understanding hematologic tests, calculations, sample handling, and interpreting results.
This document describes several methods for enumerating or counting bacteria in a sample, including viable plate count, direct microscopic count, and turbidity count. The viable plate count method involves making serial dilutions of a sample and counting the number of colonies that grow on an agar plate, then multiplying by the dilution factor to determine the concentration in the original sample. The direct microscopic count uses a counting chamber to directly view and count bacteria under a microscope. The turbidity count uses spectrophotometry to measure the turbidity or cloudiness of diluted samples, which correlates to the number of bacteria present based on a generated standard curve. Procedures for each method are provided.
A funnel is a tube or pipe that is wide at the top and narrow at the bottom, used to guide liquids or powders into small openings. Funnels are commonly made of stainless steel, aluminum, glass, or plastic. There are several types of specialized funnels including filter funnels for separating solids from liquids, powder funnels for transferring powders, and separatory funnels for separating mixtures into immiscible solvent phases. Other types include Büchner funnels for vacuum filtration, dropping funnels for slow reagent addition, and eco funnels designed to reduce chemical contamination.
Haemocytometry is a technique used to count blood cells and cells in other body fluids. It involves diluting a blood or fluid sample and counting the cells in a special counting chamber under a microscope. The total white blood cell count, platelet count, and absolute eosinophil count can be determined through haemocytometry. Precise dilution and counting technique is required to obtain accurate results, which provide information about a patient's health status and response to treatment.
This document provides information on laboratory glassware and plasticware, including their types, care, and uses. It discusses the characteristics of borosilicate glass used to manufacture glassware and lists precautions for handling glassware. Various types of volumetric wares like pipettes, flasks, burettes, and cylinders are described. Recommendations are provided for cleaning glassware and plasticware to ensure they are thoroughly cleaned and free of contamination.
Two main types of deionizers are two-bed and mixed-bed deionizers. Two-bed deionizers have separate cation and anion exchange resin beds, while mixed-bed deionizers intimately mix the resins. Both work by exchanging ions in water for hydrogen and hydroxyl ions using ion exchange resins, producing high purity deionized water free of ionic contaminants. Common applications of deionized water include use in laboratories, pharmaceuticals, chemicals, power plants, and other industrial processes requiring high purity water.
Platelet count and hematocrit determination methodsNegash Alamin
1. The document describes the principles, procedures, and clinical significance of platelet count and hematocrit determination methods. Platelet count involves diluting blood with ammonium oxalate and counting platelets under a microscope, while hematocrit involves filling a capillary tube with blood and centrifuging it to measure the ratio of red blood cells to plasma.
2. Both tests help diagnose bleeding, clotting, and anemia issues by checking platelet and red blood cell levels. Abnormally high or low counts can indicate conditions like blood cancers, blood loss, kidney disease, or dehydration. Precise methods and calculations are required to obtain accurate results.
Basic to Medical laboratory science C4.pptxBisratBogale2
Here are the key points in response to the review questions:
1. Volumetric equipment like pipettes provide accurate and precise volumes which is important for preparing standard solutions, controls and samples where the concentration needs to be known. Using calibrated pipettes avoids errors from imprecise manual volume measurements.
2. Pipettes can lose calibration over time with use due to wear and minor damage, so they need to be verified periodically like every 6-12 months. Re-calibration ensures the volumes dispensed are still within the required accuracy and precision specifications for the intended use.
3. Methods to verify pipette calibration include gravimetric testing by pipetting water and weighing replicates to calculate mean, standard deviation and coefficient of variation
This document provides an introduction to common glassware and equipment used in labs, including:
1. Glassware like volumetric flasks, pipettes, burettes, and graduated cylinders are used to accurately measure volumes of solutions. Clean glassware is essential for accurate work.
2. Volumetric flasks come in different sizes and are used to make solutions of a precise volume. Solutions are added until the meniscus is at the marked line.
3. Pipettes like Mohr pipettes are used to accurately measure small volumes of liquids. They are filled and emptied through a bulb system to control flow.
4. Burettes are used for titrations to deliver reactants in
This document discusses the instrumentation and applications of high performance liquid chromatography (HPLC). It describes the key components of an HPLC system including the solvent reservoir, pumps, sample injection system, columns, detectors, and recorders. It provides details on the types of pumps (constant flow rate and constant pressure), sample injection loops, columns and fittings. It also explains common detectors such as UV-visible and refractive index detectors. Finally, it lists several applications of HPLC in quality control testing, analysis of biological fluids, stability studies, drug metabolism studies, and industrial uses.
This document provides an overview of basic laboratory techniques and safety procedures for a biochemistry lab. It discusses the importance of following safety rules, washing and sterilizing glassware correctly, using pipettes and centrifuges accurately, and maintaining precision and accuracy in measurements. Proper technique for micropipetting, mixing solutions, washing glassware, and using volumetric pipettes, test tubes and other tools are outlined.
Pipettes are used to transfer precise amounts of liquid and come in different types for specific volumes. Volumetric pipettes deliver a single volume, usually between 1-100mL, by allowing the liquid to drain without forcing it out. Measuring pipettes measure smaller amounts between 0.1-25mL but are less accurate. Mohr pipettes have graduations ending before the tip while serological pipettes have graduations to the tip. Proper pipetting technique involves using a bulb to draw up liquid to the desired line and allowing it to drain without blowing out the remaining liquid.
Titrimetric equipment includes pipettes, burettes, beakers, graduated cylinders, stirring rods, pH meters, and conical flasks. Pipettes and burettes are used to precisely measure and deliver known volumes of liquids. Beakers are used as containers and conical flasks allow for swirling mixtures. Graduated cylinders measure bulk volumes while stirring rods mix chemicals. pH meters electrically measure the acidity or alkalinity of solutions. Each tool has advantages like precision or versatility but also limitations like cost or difficulty of use.
The document discusses infusion pumps which deliver measured amounts of fluids or medications into the bloodstream over time through peristaltic or cassette pumping mechanisms. It describes syringe and volumetric pumps, their uses, accuracy, alarms and specialized applications. It provides cleaning, error handling, and troubleshooting instructions and notes electromagnetic interference can affect pumps.
A centrifuge is a laboratory device that spins liquid samples at high speeds to separate components by density. It has a central shaft that rotates tubes containing samples, subjecting them to centrifugal force. This force throws denser particles to the bottom of the tubes, separating them from less dense materials above. There are several types of centrifuges including benchtop, refrigerated, micro, and vacuum centrifuges used for various sample volumes and separation purposes. Proper balancing of tubes and following safety procedures are important when using a centrifuge.
This standard operating procedure outlines a reverse pipetting method to accurately pipette yeast slurry, a viscous and volatile solution, in order to obtain a repeatable number of viable yeast cells within 500,000 cells when loading a cellometer. The procedure involves pre-rinsing pipette tips, slowly aspirating and dispensing the yeast slurry using reverse pipetting techniques, and analyzing pipetted samples on a cellometer to determine viable yeast cell counts. Five technicians will repeat the pipetting and analysis in triplicate using four different yeast slurries to test the accuracy and precision of the reverse pipetting method.
This document provides summaries of several common laboratory techniques and procedures:
1. It describes how to properly measure volume using graduated cylinders and pipettes, and how to read meniscus levels.
2. It explains how to weigh samples using balances, including zeroing the balance and using tare functions.
3. Common separation techniques like decantation, filtration, centrifugation, distillation, and chromatography are summarized.
The document provides safety rules and guidelines for conducting experiments in a biochemistry laboratory. It outlines general safety rules regarding protective equipment, chemical handling, glassware use, heating procedures, and first aid. It also describes the proper use of common laboratory instruments such as pipettes, pH meters, spectrophotometers, and centrifuges. The Beer-Lambert law relating absorbance, concentration, and path length is also defined.
This document provides 10 tips for accurate pipetting. The tips include pre-wetting pipette tips to reduce evaporation, never placing a filled pipette on its side, testing pipetting accuracy by dispensing volumes onto a balance, accounting for ambient temperature effects, using the proper pipette for small volumes, checking pipettes daily for damage, cleaning pipettes before use, storing pipettes vertically, applying consistent plunger pressure and speed, and examining tips before dispensing to remove droplets. Following these tips can help improve pipetting technique and ensure accurate and reliable liquid handling.
This document discusses infusion pumps, which are external medical devices that deliver fluids like nutrients and medications into a patient's body in controlled amounts. It describes different types of infusion pumps based on their size, portability, and mechanism of delivery. The key types discussed are gravity infusion devices, volumetric pumps, patient-controlled analgesia pumps, and syringe pumps. The document also outlines important safety considerations, components, and functions of infusion pumps.
This document discusses infusion pumps, which are external medical devices that deliver fluids like nutrients and medications into a patient's body in controlled amounts. It describes different types of infusion pumps based on their size, portability, and mechanism of delivery. The key types discussed are gravity infusion devices, volumetric pumps, patient-controlled analgesia pumps, and syringe pumps. The document also outlines important safety factors, components, and functions of infusion pumps.
This document provides an overview of high performance liquid chromatography (HPLC). It discusses the components of an HPLC system including the mobile phase, stationary phase, pump, injection system, column, detector, and recorder. It explains that HPLC uses liquid mobile phases and columns packed with small diameter particles to provide better resolution and faster analysis compared to traditional liquid chromatography. The document also summarizes different HPLC modes like adsorption, partition, ion-exchange, and size exclusion chromatography. It highlights that HPLC systems operate at high pressures using pumps capable of pressures over 5000 psi.
This document discusses dissolution testing apparatus and methods. It defines dissolution as the process by which a solid substance enters the solvent phase to form a solution. Several theories of drug dissolution are described, including the diffusion layer theory, Danckwert's model, and the interfacial barrier model. Six common apparatus are summarized: the basket, paddle, reciprocating cylinder, flow-through cell, paddle over disk, and cylinder methods. Procedures for each apparatus are provided. Common dissolution media and factors affecting media selection are also outlined. The document provides an overview of key concepts and equipment in dissolution testing.
Level 3 NCEA - NZ: A Nation In the Making 1872 - 1900 SML.pptHenry Hollis
The History of NZ 1870-1900.
Making of a Nation.
From the NZ Wars to Liberals,
Richard Seddon, George Grey,
Social Laboratory, New Zealand,
Confiscations, Kotahitanga, Kingitanga, Parliament, Suffrage, Repudiation, Economic Change, Agriculture, Gold Mining, Timber, Flax, Sheep, Dairying,
How to Download & Install Module From the Odoo App Store in Odoo 17Celine George
Custom modules offer the flexibility to extend Odoo's capabilities, address unique requirements, and optimize workflows to align seamlessly with your organization's processes. By leveraging custom modules, businesses can unlock greater efficiency, productivity, and innovation, empowering them to stay competitive in today's dynamic market landscape. In this tutorial, we'll guide you step by step on how to easily download and install modules from the Odoo App Store.
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ملزمة تشريح الجهاز الهيكلي (نظري 3)
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4- هُنالك بعض المعلومات تم توضيحها بشكل تفصيلي جداً (تُعتبر لدى الطالب أو الطالبة بإنها معلومات مُبهمة ومع ذلك تم توضيح هذهِ المعلومات المُبهمة بشكل تفصيلي جداً
5- الملزمة تشرح نفسها ب نفسها بس تكلك تعال اقراني
6- تحتوي الملزمة في اول سلايد على خارطة تتضمن جميع تفرُعات معلومات الجهاز الهيكلي المذكورة في هذهِ الملزمة
واخيراً هذهِ الملزمة حلالٌ عليكم وإتمنى منكم إن تدعولي بالخير والصحة والعافية فقط
كل التوفيق زملائي وزميلاتي ، زميلكم محمد الذهبي 💊💊
🔥🔥🔥🔥🔥🔥🔥🔥🔥
Andreas Schleicher presents PISA 2022 Volume III - Creative Thinking - 18 Jun...EduSkills OECD
Andreas Schleicher, Director of Education and Skills at the OECD presents at the launch of PISA 2022 Volume III - Creative Minds, Creative Schools on 18 June 2024.
2. What are Pipettes?
• A slender tube attached to or incorporating a bulb, for transferring or
measuring out small quantities of liquid, especially in a laboratory.
3. Types of pipettes:
Five grades of pipettes includes..
• Disposable/ Transfer pipettes
• Graduated/serological pipettes
• Single channel pipettes
• Multichannel pipettes and
• Repeat pipettes
• Electronic Pipettes
4. Disposable/ Transfer pipettes
• The most basic pipettes.
• It is not sophisticated Equipment of laboratory.
• Used for rough estimation.
• Disposed after usage.
• Very important because its follow the standard pipetting techniques.
• Aspirate liquid at a 90-degree angle and dispense at a 45-degree
angle.
• Make sure that all the liquid is dispensed.
5. Graduated/Serological Pipettes
• Using of this type of pipette, the final volume is found by calculating
the difference of liquid level before and after dispensed.
• Standard technique for using graduated pipette
Uses:
Used for high amounts of measurements.
• Hold pipette in solution. Don’t touch the bottom.
• Squeeze the bulb and attach to the top of the pipette.
• Hold forefinger on the top of the pipette to control the volume
aspiration.
• Subtract the amount needed into a separate beaker while staying eye
level to assure proper measurement.
• Measure the solution from the bottom of the meniscuses.
6. • Subtract needed volume from the initial volume and find the volume
needed to release to in order to get desired amount.
7. Single Channel Pipette:
• Also known as Micropipette.
• Non deposable device.
• Air-displacement designed which used for accurate measurement of
liquids and reagents in microliters to 1 milliliter.
• Required disposable tips for their measurements
• Very sensitive to use.
9. Forward Technique:
• The most common technique for pipette measurement.
• Press the plunger to the first stop and slightly submerge the pipette
tip into the liquid, release the plunger slowly to prevent bubbles.
• To dispensed the liquid, place the tip against the side of receptacle,
then slowly press the plunger through the first stop to the final blow.
10. Reverse Pipetting Techniques:
• When working with viscous solution or to aspirate bubble solution we
have the option to use this technique.
• This technique will minimize interference from air bubbles.
• Press the plunger all the way to 3rd stop position slightly submerge
into the liquid and slowly release the plunger.
• Aspirate the liquid into the tip, place the pipette against the
receptacle wall and press the plunger to the first stop, holding the
plunger in place and remove the tip from the receptacle.
• Now You will have a sample liquid that remain in the tip but it is not
the part of the measurement.
11. Multichannel Pipette:
• The technology and techniques behind this pipette is similar to that of a
single channel except it takes more than one tip at a time. Since liquid is
aspirated at the same time from the small well into the multiple channel,
you must ensure the aspirated liquid level are equivalent then it
dispensed into the plate well.
Uses:
• Install of the proper tips to each channel and set the desired volume.
• Hold the pipette in vertical position depress the plunger to the first stop.
• Immerse the tip into the liquid and release the plunger to back to the rest
position.
• Place the tips at a45 degree against the vessel and push the plunger to the
2nd stop to expel all the liquid to the vessels.
12. Repeat Pipette dispenser:
• This type of pipette allow a lab worker to set and dispense a specific volume
into multiple receptacles without having to aspirate in between dispenses.
This multi-dispensing capability saves time and effort.
• It has a different design than the typical pipette.
• The difference is a filling and dispensing lever as opposed to a plunger.
• To use to a repeater pipette successfully.
Uses:
• Slide the filling lever down as far as it goes.
• Raise the locking clamp upward.
• Insert the syringe type tip into the barrel so that it click into the position
then close the lever.
• Immerse the tip into the liquid at a 90 degree angle.
13. • Slowly slide the filling lever upward to fill the tip completely.
• Prime the tip by discarding the liquid from the first dispense
• The repeating pipette is now ready to operate.
• Accuracy and repeatability are two most important aspects of testing
with pipettes.
14. Electronic Pipettes
• Electronic pipettes are ideal tools in the Laboratory.
• Where the accuracy of your results, speed and ergonomics are
important.
• Their fully electronic control guarantees consistent, user-independent
results, and their lightweight, ergonomic design gives you total
convenience.
• With their multiple pipetting modes, you may perform your liquid
handling tasks faster than with mechanical pipettes.
• Many applications in laboratories today require the pipetting of very
small amounts of liquid – just a few microliters, exactly and
repeatedly.
• Electronic pipettes ensure high accuracy and precision, by
significantly reducing human variance.
17. Air Displacement Pipette
• An air displacement pipette is a common laboratory tool used to
handle a measured volume of liquid between 1 µl to 1000 µl (1 ml).
Due to its high accuracy, this laboratory tool is commonly used in
standard pipetting applications.
• The piston moves to the appropriate position when the volume is set.
• When the operating button is pressed to the first stop, the piston
expels the same volume of air as indicated on the volume setting.
• After immersing the tip into the liquid, the operating button is
released.
18. Pipetting Error
1. Not accounting for the Viscosity of a sample
A sample that contain large and sticky molecules.
2. Dispensing the Liquids too quickly.
3. Contamination by “Double Dipping”.
4. Cleaning Irregularly- or not at All.
5. Taking a break only at the end of the work.