Before nitrile examination gloves
were invented, doctors and nurses had no protective covering for their hands. Disposable gloves started with one man’s vision to help his wife prevent rashes from developing on her hands when they were in surgery. In 1889, Dr. William Steward Halstead noticed that his nurse, and later wife, Caroline Hampton, developed rashes from the chemicals she handled. In need of a solution, Halstead reached out to the Goodyear Rubber Co. who created rubber gloves for her hands. This was such a success that eventually his entire surgical staff wore gloves during operations.
Machines that remove heat from a liquid through a vapor-compression or absorption refrigeration cycle are called chillers
. The refrigeration cycle chiller creates waste heat that, when removed, results in greater efficiency. To accomplish this, liquid can be circulated through a heat exchanger, thus cooling the equipment. When it comes to vapor-compression chillers, they require compressors which are mechanical devices that can be powered by electric motors, steam, or gas turbines. These chillers utilize four basic types of compression: reciprocating compression, scroll compression, screw-driven compression, and centrifugal compression. Evaporative cooling heat rejection allows their coefficients-of-performance to be very high.
Before we discuss digital microscope cameras, let’s briefly review what distinguishes digital microscopes from other types of microscopes. A digital microscope is a variation of a traditional optical microscope that uses optics and a digital camera to output an image to a monitor via computer software. They usually have their own built-in LED light source, and since the image is focused on the digital circuit, the entire system is designed for the monitor image. There is no provision to observe the sample directly through an eyepiece, as you would find on an optical microscope, and therefore the optics for the human eye are omitted. Digital microscopes are commonly low priced commercial microscopes
designed to be used with a computer.
Graduated Cylinders and Beakers are both common pieces of laboratory equipment. A Graduated Cylinder has a narrow cylindrical shape with each marked line showing the volume of liquid being measured. While they are generally more accurate and precise than laboratory flasks and beakers, they should not be used to perform volumetric analysis. They are also sometimes used to measure the volume of a solid indirectly by measuring the displacement of a liquid. Whatever your use may be, these varieties can handle the task.
Water aspirators were once a staple in many biology and chemistry labs but are becoming an increasingly uncommon sight as they are being replaced with vacuum pump aspirators. Water aspirators are designed to connect to a lab faucet and allow water to flow through a tube inside of the aspirator, thereby creating a vacuum. While this type of aspirator is inexpensive and has done a decent job for a very long time, you may want to think about upgrading to a vacuum pump aspirator. Why? Let’s take a close look at the environmental impact, performance, and lifetime cost of a water aspirator as compared to a vacuum pump
The proper and accurate measurement of pH is one of the most critical factors in any laboratory procedure. At Next Day Science, we offer pH meters and colorimeters that meet even the most demanding pH measurement requirements. In addition to checking general acidity and alkalinity, our specialized meters measure the pH of silica, chlorine, phosphate, phosphorus, bromine, calcium, chromium, and ammonia, From bench top to portable to pocket pH meters, you are sure to find the right meter for your laboratory needs.
Liquid handling is one of the core functions of any laboratory, and pipetting is one of the most common functions performed in labs. It is both a measuring technique and the conveyance method used for transporting small volumes of fluid. Whether liquids are being moved on a small scale, one sample at a time, or on a larger scale, with dozens of samples at a time, there is a need to transfer liquids cleanly and accurately from one vessel to another.
Laboratories experimenting and studying biological sciences have a near-universal need for liquid handling. Those that pipette hundreds of samples a day can start to see problems like inaccurate transfers because of repetitive motion injuries with their liquid handlers. There are, however, some techniques you can employ and changes you can make to reduce the chances of repetitive stress injuries and to continue to achieve the high standards you expect in your lab while using pipettes and single or multiple channel pipettors.
A critical piece of laboratory equipment, a laboratory centrifuge
is a motor-driven device that spins liquid samples at very fast speeds around a central point. The concept behind the centrifuge is that it relies on the sedimentation principle. By spinning so quickly and forcing substances inward, which is called centripetal acceleration, the substances of greater and lesser density will separate, causing sedimentation to occur. This separation allows for isolation, study, and research of specific substances. A mini-centrifuge
, also called a microcentrifuge, works in the same way, but is capable of working with much smaller samples, using micro-tubes that range in size from 0.2 ml to 2.0 ml. Its compact design and smaller footprint makes it convenient to use on the workbench, while also economizing on workspace.
Laboratory baths are available with two key methods of heating and cooling. There are general purpose water baths, which work with heated water, and circulating baths for experiments and research that require temperatures above the boiling point and below the freezing point, serving both heating and cooling needs. Read here for a guide to the several types of water and circulating baths:
When you think of the most essential equipment in a laboratory, those items that promote safety are at the top of the list. Autoclaves
, which use high pressure steam to sterilize liquid, glass, and biohazards; micro bead sterilizers
, which easily eliminate bacteria from small lab and research tools using a heated glass bead technology; and chemical safety cabinets
, which provide a vented environment for chemicals--all three of these pieces of laboratory equipment are designed to promote safe and effective lab work. Here is more information on each type of equipment piece so that you can make the best decisions in your laboratory purchases.
Used to determine the mass of an object, scales are among the most ubiquitous, important instruments in any laboratory or industrial setting. And regardless of type, a professional caliber scale must be reliable, durable, and most of all, accurate. At NextDayScience
, we offer ultra-precise, top rated platform scales, pallet truck scales, veterinary scales, and bench floor scales at competitive prices. Here is more detailed information on our scale selection
Two common pieces of lab equipment are thermocyclers and hot plate stirrers. Here is some basic information about both to assist you in making your lab purchases.
Thermocyclers, or thermal cyclers, are instruments used to amplify DNA and RNA samples by the polymerase chain reaction (PCR). The thermocycler raises and lowers the temperature of the samples in a holding block in discrete, pre-programmed steps, allowing for denaturation and reannealing of samples with various reagents. Amplified genetic material can be used in many downstream applications such as cloning, sequencing, expression analysis, and genotyping.
Electrophoresis, also known as cataphoresis and anaphoresis, is the motion of colloidal particles suspended in a fluid medium, due to the influence of an electric field. Breaking that definition down, in chemistry, a colloid is a mixture of insoluble particles that are suspended throughout another substance. For instance, milk is an emulsified colloid of liquid butterfat globules dispersed within a water-based solution. To qualify as a colloid, the mixture must be one that either does not settle or takes a very long time to settle. Add electricity to the equation, and you’ve got electrophoresis. Electrophoresis is a technique used in laboratories in order to separate macromolecules based on size.
Whether you are seeking a high-end instrument or a more affordable option, when it comes to buying balances and scales, you will get the most value for the price at NextDayScience. Plus, you'll have the security of knowing that you are buying the best in precision instruments, no matter what your price point. The analytical balances and top loading balances set new standards of weighing excellence, while the compact balances are the best choice for economy and simple operation. And our laboratory aspirators are a safe and reliable way to eliminate liquid waste and pathogens, no matter how dangerous. Following is more detailed information about the many instruments we offer at NextDayScience:
Analytical and Top Loading Balances: Our Precisa analytical balances and top loading balances couple premium workmanship of robust die-cast aluminum housing with the finest engineering materials, providing excellent protection against mechanical and electrical interference.
Cryogenic freezing is a process of cold preservation that is accomplished with very low temperatures. We’re talking a bone-chilling -238° F or -150° C. The storage method is derived from the science of cryogenics, which is about creating very cold environments and studying what the results are for samples that experience extremely low temperatures.