Introduction Biological life, atmospheric circulation and the Earth’s climate may be influenced by UV-B radiation. In plants, Ultraviolet Absorbing Compounds (UACs) are an indicator of exposure, abundance UACs in pollen spores embryophytes is measurable using Fourier Transform Infrared (FTIR) micro-Spectroscopy. However, understanding influence common chemical pre-treatments on sub-fossil with ...

The mannan of bakers' yeast (Saccharomyces cerevisiae) was fractionated on a column of diethylaminoethyl-Sephadex into five subfractions. Phosphate content of these mannan subfractions was proportional to the concentration of NaCl solutions used in the chromatographic separation. Quantitative precipitin reactions showed that the serological reactivities of the subfractions were proportional to ...

In a recent paper (8), we have provided evidence that reactivity of anti-Candida albicans monoclonal antibodies to neoglycolipids (NGL) constructed from C. albicans mannan acid-labile oligomannosides (NGLH) and corresponding to homopolymers of P(1-2)-linked mannopyranosyl units (4, 7) was correlated with reactivity against a 14to 18-kDa C. albicans antigen. Conversely, monoclonal antibodies rea...

Platelet activating factor obtained from antigen-stimulated rabbit buffy coat leukocytes containing 10% IgE-sensitized basophils was shown by gas-liquid chromatographic and mass spectrometric analysis of products after acetolysis and by base and acid hydrolysis to be acetyl-alkylglyceryl phosphorylcholine. The alkyl side chains were composed of octadecyl (greater than 90%) and hexadecyl (less t...

We have obtained evidence for two structurally and antigenically different Saccharomyces cerevisiae cell wall mannans. One, which occurs widely and is found in S. cerevisiae strain 238C, is already known to be a neutral mannan which yields mannose, mannobiose, mannotriose, and mannotetraose on acetolysis of the (1 --> 6)-linked backbone. The other, which was found in S. cerevisiae brewer's stra...

A soil microorganism, designated Arfhrobacfer GJM-1, has been isolated which is capable of growing on Saccharomyces cerevisiae mannan as the carbon source. When grown on mannan, the microorganism secretes an a-mannosidase into the cultural medium. The enzyme is not found when mannose, glucose, or glycerol is substituted for mannan, but is present when oligosaccharides obtained by acetolysis of ...