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L L Barton

Publications and source records attributed to L L Barton.

154 records · Page 9Linked to original sources
PubMed1972

Effect of maltose on glucoamylase formation by Aspergillus niger.

Low levels of glucoamylase are produced when Aspergillus niger is grown on sorbitol, but substitution of the latter by glucose, maltose, or starch results in greater formation of glucoamylase as measured by enzymatic activity. Both glucoamylase I and glucoamylase II are formed in a yeast extract medium; however, glucoamylase I appears to be the only form produced when ammonium chloride is the nitrogen source. Maltose or isomaltose (1.4 x 10(-4)m), but no other disaccharides or monosaccharides, dextrins, dextrans, or starches, stimulated glucoamylase formation when added to mycelia pregrown on sorbitol-ammonium salts. The induction of glucoamylase by maltose was independent of sulfate concentration but showed a dependency on low pH and the absence of utilizable carbon sources.

Aspergillus↗
PubMedDate not supplied

Epidemiology of needlestick injury in emergency medical service personnel.

Employees of the St. Louis Emergency Medical Service (EMS) reported 44 needlestick injuries during a recent 38-month period, an incidence of 145 injuries/1,000 employee years. New employees, that is, those employed for less than a year, reported 19 (43%) of these injuries. Two employees developed clinically apparent hepatitis B during the study period. These results document a high risk to emergency medical personnel of exposure by needlestick to blood potentially infectious for hepatitis and other pathogens. EMS personnel require early and continuing educational efforts directed toward prevention of needlestick injuries and should be offered hepatitis B vaccine.

Accidents, Occupational↗