Researchers have analyzed samples of the asteroid Ryugu collected by the Japanese Space Agency's Hayabusa2 spacecraft and found uracil, one of the informational units that make up RNA, the molecules that contain the instructions ...
Astrobiology
Mar 21, 2023
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409
A special group of workers in honey bees (Apis cerana), the undertakers, perform "undertaking behavior" to remove dead bodies. The undertakers rely on a signal associated with death to perform this behavior. However, it remains ...
Plants & Animals
Mar 14, 2023
0
24
A new state-of-the-art method that measures the amounts of drugs and lipids (fats) in individual cells could help health professionals target more effective treatments for diseases such as tuberculosis (TB).
Biochemistry
Feb 16, 2023
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4
Researchers from Tokyo Metropolitan University and RIKEN CSRS have developed a new analytical platform based on liquid chromatography, mass spectrometry and software analysis that quantifies the structure of messenger RNA–based ...
Biochemistry
Feb 13, 2023
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10
Graphene-based olfactory sensors that can detect odor molecules based on the design of peptide sequences were recently demonstrated by researchers at Tokyo Tech. The findings indicated that graphene field-effect transistors ...
Bio & Medicine
Jan 19, 2023
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12
Photosynthesis is the greatest natural process on Earth, converting sunlight into chemical energy on a massive scale and maintaining life. There are basically two successive stages of oxygenic photosynthesis, of which the ...
Biochemistry
Jan 10, 2023
0
22
Recently, a research team led by Prof. Yang Shangfeng from the University of Sciences and Technology of China (USTC) of the Chinese Academy of Sciences (CAS) synthesized La@C81N, a type of monometallic endohedral azafullerene ...
Materials Science
Jan 4, 2023
0
11
Clams and other invertebrates often live in habitats with dense bacterial populations, despite lacking adaptive, lymphocyte-based immune systems. How clams resist bacterial pathogens in the environment is unclear.
Plants & Animals
Nov 29, 2022
0
43
Imagine, if you will, a small plastic baggy containing a mixture of crystals and powder.
Analytical Chemistry
Oct 20, 2022
0
44
"Metabolism" describes the body's chemical changes that create the necessary materials for growth and overall health. Metabolites are the substances made and used during these metabolic processes—or, as a new discovery ...
Biochemistry
Oct 13, 2022
0
172
Chromatography (from Greek χρῶμα chroma "color" and γράφειν graphein "to write") is the collective term for a set of laboratory techniques for the separation of mixtures. The mixture is dissolved in a fluid called the "mobile phase", which carries it through a structure holding another material called the "stationary phase". The various constituents of the mixture travel at different speeds, causing them to separate. The separation is based on differential partitioning between the mobile and stationary phases. Subtle differences in a compound's partition coefficient result in differential retention on the stationary phase and thus changing the separation.
Chromatography may be preparative or analytical. The purpose of preparative chromatography is to separate the components of a mixture for further use (and is thus a form of purification). Analytical chromatography is done normally with smaller amounts of material and is for measuring the relative proportions of analytes in a mixture. The two are not mutually exclusive.
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