Review of the defence chemistry of coccinellids
Article Abstract:
The synthesis of alkaloids and a variety of chemical mechanisms in the body contributes to the defensive ability of coccinellid beetles, of which lady bugs are the best known. The aposematic odor and vivid color of some coccinellids is an indication of their chemical defense. In some cases, these beetles use compounds produced by other organisms for their defence. Eight alkaloids have been so far isolated from coccinellids. These beetles are the only natural source of alkaloids based on the azaphenalene skeleton. The isolation and detection of alkaloids, biosynthetic studies, and bioassay results of coccinellids are described.
Publication Name: Chemical Reviews
Subject: Chemistry
ISSN: 0009-2665
Year: 1996
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Analysis of selenium in body fluids: a review
Article Abstract:
Examination of different analytical procedures for the estimation of Se in human body fluids indicates that type of fluid decides the sampling and storage technique. Voltalization is minimum during acid digestion. Various techniques, including modern spectroscopic techniques, chromatographic techniques, neutron activation analysis and electrochemical methods, help estimate the level of Se in body fluids. Advantages of each method are discussed.
Publication Name: Chemical Reviews
Subject: Chemistry
ISSN: 0009-2665
Year: 1995
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Solvent density inhomogeneities in supercritical fluids
Article Abstract:
The fundamental nature of solvent density inhomogeneities in infinitely dilute supercritical fluid solutions was examined. Evidence for inhomogeneities resulting from dynamic measurements were analyzed. Studies that have been conducted supporting no density inhomogeneities were also discussed. In addition, the impact of fluctuations on local densities and dynamic solute processes were examined.
Publication Name: Chemical Reviews
Subject: Chemistry
ISSN: 0009-2665
Year: 1999
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- Abstracts: Thermodynamics of calixarene chemistry. Phase behavior of polymers in supercritical fluid solvents. Quantitative measures of solvent polarity
- Abstracts: Reactions and thermochemistry of small transition metal cluster ions. Surface chemistry and tribology of mems
- Abstracts: Selenium concentrations in natural and environmental waters. Natural terphenyls: Developments since 1877
- Abstracts: Hyaluronan: preparation, structure, properties, and applications. Target-related applications of first principles quantum chemical methods in drug design
- Abstracts: Signaling recognition events with fluorescent sensors and switches. Calixarene-derived fluorescent probes