由各种抗生素糊剂诱导的皇冠变色上的冠内漂白的光谱光度分析:一种体外研究

This protocol describes wind tunnel experiments designed to study the transition of a fire from the ground to the canopy of chaparral...

We have developed a microfluidic platform for rapid antibiotic susceptibility testing. Fluid is passed at high speeds over bacteria immobilized on the bottom of a microfluidic channel. In the presence of stress and antibiotic, susceptible strains of bacteria die rapidly. However, resistant bacteria can survive these stressful...

Crown ethers are cyclic polyethers that contain multiple oxygen atoms, usually arranged in a regular pattern. The first crown ether was synthesized by Charles Pederson while working at DuPont in 1967. For this work, Pedersen was co-awarded the 1987 Nobel Prize in Chemistry. Crown ethers are named using the formula x-crown-y, where x is the total number of atoms in the ring and y is the number of ether oxygen atoms. The term 'crown' refers to the crown-like shape that these ether molecules...

Source: Laboratory of Dr. Michael Evans — Georgia Institute of Technology
The equilibrium constant, K, for a chemical system is the ratio of product concentrations to reactant concentrations at equilibrium, each raised to the power of their respective stoichiometric coefficients. Measurement of K involves determination of these concentrations for systems in chemical equilibrium.
Reaction systems containing a single colored component can be studied spectrophotometrically. The relation between...

The porosity of concrete is a measure of the void spaces within its structure. These spaces impact its strength and durability significantly. When water and cement interact, a chemical reaction called hydration creates a semi-solid paste. This paste includes combined water, making up approximately 23% of the cement's dry mass, and gel water, which fills minuscule voids known as gel pores, accounting for about 28% of the cement gel volume.
The balance of water to cement in the mix is...

Chromatin looseness appears to be involved in the developmental potential of blastomeres. However, it is not known whether chromatin looseness can be used as a reliable index for the developmental potential for embryos. Here, an experimental system in which chromatin looseness-evaluated zygotes can develop to full term has been...