Showing papers by "Donald V. Lightner published in 1982"
TL;DR: The histopathogenesis of aflatoxicosis in the aflatoxin-exposed animals was followed and found to be time and dose dependent in the hepatopancreas, mandibular organ, and in the hematopoietic organs.
46 citations
TL;DR: The mortality response in a feeding study with P. vannamei was not dose dependent, but tissue and organ damage were similar to that seen in injected animals.
Abstract: Single intramuscular injections of aflatoxin B1 into the tail muscle of Penaeus stylirostris produced 24- and 96-h median lethal doses of 100.5 (78.3 to 129.0) and 49.5 (29.8 to 82.3) mg/kg, respectively. A toxicity curve showed no threshold at the levels tested. The mortality response in a feeding study with P. vannamei was not dose dependent, but tissue and organ damage were similar to that seen in injected animals.
29 citations
TL;DR: Leucothrix mucor Oersted, the primary cause of filamentous gill disease in cultured shrimp, was treated with algicides and surfactants by a serial dilution method and was found to be highly sensitive to thoseAlgicides containing quaternary ammonium compounds.
Abstract: Leucothrix mucor Oersted, the primary cause of filamentous gill disease in cultured shrimp, was treated with algicides and surfactants by a serial dilution method. It was found to be highly sensitive to those algicides containing quaternary ammonium compounds. Copper-containing compounds and Formalin were less effective, whereas potassium permanganate and two surfactants, Dreft and Alconox, were ineffective.
4 citations
TL;DR: Extraction with 1 M NaCl followed by 0.5 M acetic acid solubilized 94% of the total protein but no hydroxyproline, indicating that shrimp collagen is uniformly insoluble, perhaps because of extensive cross-linking.
Abstract: 1. 1. A soluble fraction and an insoluble fraction were isolated from cuticle-free tail tissue of Penaeus vannamei and their amino acid compositions compared to analogous fractions previously isolated from Penaeus setiferus by Thompson & Thompson ( Comp. Biochem. Physiol. 27 , 127–132 (1968); 35 , 471–477 (1970)) in which tryptophan contents of 119.3 and 190.4 residues/1000 were reported. 2. 2. The previously-reported tryptophan values are surprisingly high, because tryptophan is generally the least abundant amino acid in proteins. In this study, a maximum of 9.7 tryptophan residues/1000 were found. 3. 3. Extraction with 1 M NaCl followed by 0.5 M acetic acid solubilized 94% of the total protein but no hydroxyproline, indicating that shrimp collagen is uniformly insoluble, perhaps because of extensive cross-linking.
2 citations