Laboratory Equipment Blog
June 27, 2017
Absorption of light correlates to the energy of a photon that is taken-up by electrons of the substance atom. The electromagnetic energy is transformed into internal energy of the absorbent substance. The absorbance of a substance quantifies how much of the incident light is absorbed by it (instead of being reflected or refracted). Precise measurements of the absorbance at many wavelengths allow the identification of a substance via absorption spectroscopy, where a sample is illuminated from one side, and the intensity of the light that exits from the sample in every direction is measured (see Fig. 1). A few examples of absorption are ultraviolet–visible (UV-Vis) spectroscopy or infrared (IR) spectroscopy.
Fig 1. Concept of absorbance spectroscopy using white light and o
June 27, 2017
The use of fluorescent probes in cell physiology has emerged as indispensable tool in the analysis of cell functioning over recent years. The physics underlying fluorescence is illustrated by the electronic-state diagram (so-called Jablonski diagram, see Fig. 1), showing the three-stage process to create the fluorescent signal (Excitation - Excited/State Lifetime - Fluorescence Emission) in a fluorophore/indicator and simplified described below.
Fig. 1– Jablonski diagram illustrating the processes of fluorescence by absorption of higher photon energy by a fluorophore and subsequent emission of lower photon energy, resulting i
June 09, 2017
The notable expert in the area of electrochemical sensors, Xueji Zhang, PhD, Sr. Vice President and Chief Scientist at WPI, is leading the development for microsensors (including the ISO-H2S-100-Cxx) for free...
April 14, 2017
World Precision Instruments was selected to receive the FVMA (Florida Veterinary Medical Association) Industry Award for 2017.
February 10, 2016
When precision and repeatability of motion are critical, WPI's MTM-3 Motorized Stereotaxic Frame outperforms manual stereotaxic frame models, and it greatly reduces human error. The motorized axis of the MTM-3 provide precise, controlled, 3-dimensional placement of any probe or accessory within the working space of a stereotaxic frame. No computer is required.
The MTM-3 supplied with WPI stereotaxic frames is also compatible with standard stereotaxic frames and may be adapted to existing frames of other manufacturers. Dual manipulator arm motorized systems are also available.
MTM-3 Stereotaxic Frame Introduction
This videos gives a 2 minute overview of the new frame.
Why Get the MTM-3 Stereotaxic Frame for your Laboratory?
November 20, 2015
For small batches of cell culture
Are you ready to perform experiments involving a cultured cell monolayer? If your monolayer has not reached confluence, you may have holes or gaps in the monolayer that would prevent collection of valid experimental data. When confluence is reached, the electrical resistance across the monolayer peaks and then plateaus. The EVOM2 meter was designed specifically for this application.
The EVOM2 is the ideal meter for use when you are making manual TEER measurements on small batches of cell cultures and do not require a high throughput system.
EVOM2 - Perfect for TEER
The EVOM2 was designed to measure TEER resistance without damaging the epithelial cells. It passes a constant current
October 20, 2015
LabTrax 8/16 hardware combined with MDAC software is an excellent choice for WPI's SI-H line of muscle physiology products like the SI-MT Muscle Platform, SI-CTS Cell Tester and SI-HTB Horizontal Tissue Baths. This data acquisition system is ideal for testing physiological characteristics like the contractile and elastic properties of different tissues in various conditions like isometric, anisometric or isotonic states. This data acquisition system was designed with the muscle researcher in mind, because the knowledge of physiological characteristics of muscles is critical when quantifying the beneficial or adverse effects of a stimulus (like a pharmaceutical drug) on muscle function in pre-clinical studies.
October 04, 2015
The type of pump you choose for your fluid handling will largely depend on your laboratory application. In this article, we will compare the popular pump types.
A peristaltic pump has a series of rollers that rotate around the edge of the pump head. A flexible tubing is threaded around the rollers and pressed up tight next to them, pinching the tubing where it contacts a roller. As the rollers rotate around the head, the fluid in the tubing moves from the input to the output. The rate of head rotation and the size of the tubing determine the volume of fluid that can be pumped. The volume that can be pumped is limited only by the volume of the input source.
A syringe pump consists of a syringe attached to a motor driven pusher block
June 25, 2015
Are you looking for a unique, low-volume syringe that holds metal tips (with needles as small as 36 gauge) as well as glass or quartz tubing? NanoFil is the answer.
Necessity is the mother of invention”
This quote from the dialogue Republic by ancient Greek philosopher Plato, could be considered one of the mantras of scientific research and product development. Many specialized products used in research were developed out of a specific need that was not already addressed in the market place. We often use these products without even thinking about their history, their development, or the imagination of the person who invented them. WPI's NanoFil