One of the most significant long-term effects of cocaine use is damage to the nose. A septal perforation, or a âhole in the septumâ is a condition that is commonly caused from snorting or âsniffingâ cocaine through the nose. The nose has a fragile blood supply, which is shut off by cocaine use. This process is called vasoconstriction (closing off of blood vessels).
Scleroglucan and PSAT are two Beta-1,3/1,6-polysaccharides. Beta glucans are derived primarily from yeast cell wall, various fungi, grains, and mushrooms. Beta 1,4 glucan is derived from oats and barley while not included in this research summary of forms of Beta 1,3/1,6 glucan.
Structure of the Month: Beta-lactamase Enzyme Structures. Beta-lactamases are enzymes produced by some Gram-negative and Gram-positive bacteria and are responsible for resistance to a broad class of-beta-lactam antibiotics, including penicillin.There are several groups and classes of beta-lactamases that result in antibiotic resistance.For example, several class C beta-lactamases result in cephalosporin resistance and some class A beta-lactamases confer resistance to oxyimino-cephalosporins, cephamycins and carbapenems.Two different beta â lactamase structures have recently been determined by the Center for Structural Genomics of Infectious Diseases.or example, several class C beta-lactamases result in cephalosporin resistance and some class A beta-lactamases confer resistance to oxyimino-cephalosporins, cephamycins and carbapenems. Two different beta â lactamase structures have recently been determined by the Center for Structural Genomics of Infectious Diseases.