Aminotransferase activities and amino acid excretion of bivalve mollusks and brachiopods

Hammen, Carl S.

doi:10.1016/0010-406x(68)90661-0

Cited by 82 publications

(26 citation statements)

References 15 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Except for studies concerned with the osmotic function of specific amino acids such as taurine and aspartate (Lange 1963;Hammen 1968), most studies have quantified amino acids as total amino N excretion (Pandian 1975;Bayne and Scullard 1977). For some groups such as molluscs, this fraction could amount to as much as 35% of their total excreted nitrogenous material (Pandian 1975).…”

Section: Discussionmentioning

confidence: 99%

Amino acid and ammonium utilization by heterotrophic marine bacteria grown in enriched seawater

Tupas

Koike

1990

Limnology & Oceanography

View full text Add to dashboard Cite

The nitrogen metabolism of natural bacterial assemblages was studied in seawater cultures enriched with the dissolved materials released by the mussel Myths edulis. The mussel released dissolved organic C, NH,', and dissolved organic N (DON), mostly in the form of combined amino acids (-70-100%) that constituted 30% of the total N released. lsNH4+ techniques showed that the contribution of NH,+ to total microbial N demand during growth ranged from 50 to 88% even when large amounts of DON were utilized (-70-260% of total bacterial N produced). An average of 80% of the DON used was converted to NH,+, showing simultaneous assimilation and regeneration of NH,+ by the natural microbial population and contradicting the idea that NH,' assimilation occurs only when organic N is limiting.

show abstract

Section: Discussionmentioning

confidence: 99%

Amino acid and ammonium utilization by heterotrophic marine bacteria grown in enriched seawater

Tupas

Koike

1990

Limnology & Oceanography

View full text Add to dashboard Cite

show abstract

“…One possible explanation of the changing values for the O:N ratio stems from the suggestion by HAMM~N (1968) that the razor clam Tagellus plebius may respond to stress by liberating more amino acids and less ammonia. If amino acid loss is a form of leakage, rather than true excretion (PoTTS 1967), and the proportion of amino-nitrogen in the total 'excreted nitrogen' increases during stress, the decreasing O:N values may not represent a true increase in protein metabolism.…”

Section: Discussionmentioning

confidence: 99%

Some physiological consequences of keepingMytilus edulis in the laboratory

Bayne

Thompson

1970

Helgolander Wiss. Meeresunters

120

View full text Add to dashboard Cite

KURZFASSUNG: Einige physiologische Konsequenzen bei der H~ilterung von Mytilus edulisim Laboratorium. Bei Nahrungsmangel und unter Temperaturstrefl verringerte sich in den Geweben yon Mytilus edulis L. der Gehalt an Kohlehydraten und Proteinen. Diese Substanzverluste sind im Mantelgewebe grSt~er als in den fibrigen Geweben. Trotz der Gewichtsreduktion sistiert jedoch die Keimzellbildung nicht. Je st~irker der StreW, um so intensiver ist der Abbau yon Kohlehydraten und Proteinen, wobei zwischen Kohlehydrat-und Proteinanteil eine proportionale Beziehung erhalten bleibt. Der O~-Verbrauch nahm unter den genannten Versuchsbedingungen ab, die N2-Exkretion stieg an oder ging geringffigig zuriick. Das Verh~iltnis yon veratmetem 0-2 zu ausgeschiedenem N2 nahm bei allen Versuchen ab, und zwar um so st~irker, je intensiver der Stret~ einwirkte. Daraus ist zu schliet~en, dai] Eiweit~ zur Energiegewinnung verbraucht wurde. Die Ergebnisse werden im Hinblick auf die Beurteilung des physiologischen Zustandes yon Muschelkulturen diskutiert. I N T R O D U C T I O NThe increasing interest in maintaining populations of lamellibranchs in artificial or semi-artificial conditions for purposes of breeding and cultivation creates a need for more knowledge of the physiological responses to abnormal environments. The conditions that are imposed on a species in hatchery cultivation practice may frequently be characterized by constant high ambient temperatures and relatively low food levels. In so far as these conditions will be sub-lethal, but abnormal, they represent a stress on the animal that may then be reflected in an altered maintenance energy requirement for the animal and consequent physiological responses. Knowledge of these responses should lead to better cultivation practice. Furthermore, it should prove possible to define physiological indices that are both descriptive and predictive of stress, and then to use such indices to characterize natural as well as cultivated populations in order to monitor, for example, the effects of pollution and artificial enrichment of the environment.This paper is a report of some preliminary experiments designed to follow certain physiological parameters in populations of the common mussel, Mytilus edulis L., kept for long periods in the laboratory. M. edulis has already been extensively investigated and is a convenient animal for such experiments because of its ease of culture, its al-

show abstract

“…In the present study, the diminished glycogen content in body tissues of Culex larvae indicates its rapid utilization for energy generation; a demand caused by rutin extracted from Jatropha gossypifolia leaf as a consequence toxic stress during the experiment. Finally, glycogenolysis seems to be the result of increased secretion of catecholamine due to stress of plant extracts treatment [35] . Larvae also secrete catecholamine in excess amount, during stress, which depletes glycogen reserves [36] .…”

Section: Resultsmentioning

confidence: 99%

“…The leaves of these plants were washed properly in tap water and the leaves were cut by scissors then dried in shady place and finally dried in an incubator at about 35 0 C temperature; dried leaves were powdered by electric Grinder. About 50 g powder of leaves was subjected in Soxhlet extraction unit with about 250-300 mL ethyl alcohol for about 72h at [30][31][32][33][34][35][36][37][38][39][40] 0 C. In case of compound Apigenin after extraction, the aqueous layer was collected and left to stand in a cold place for 72 hours; a yellow precipitate separated out from the solution. The precipitate was filtered and washed with a mixture of chloroform: ethyl acetate: ethanol (2:1:1).…”

Section: Introductionmentioning

confidence: 99%

Larvicidal activity and Biochemical Effects of Apigenin against Filarial Vector Culex quinquefasciatus

Johnson¹

2017

IJLSSR

View full text Add to dashboard Cite

ABSTRACT-Mosquito-borne diseases have intruded the globe since immemorial time. The present scenario for commanding the mosquitoes is aimed at application of target and stage-specific, cost-effective and biodegradable phytoproducts. Plant extracts are safer for non-target organisms including man. Plant based formulations would be more feasible environmental products with proven potential as insecticide. Therefore, in the present study of larvicidal activity of biologically active compound Apigenin extracted from leaf of Jatropha gossypifolia against the filarial vector, Culex quinquefasciatus was studied. Standard WHO protocols with minor modifications was adopted for the larvicidal bioassay. The active compound Apigenin extracted through ethyl alcohol solvent from the leaf of Jatropha gossypifolia plant of family Euphorbiaceae was administered for 24h or 96h to the larvae of Culex quinquefasciatus. Exposure of larvae over 24h to sub-lethal doses (40% and 80% of LC 50 ) of apigenin, significantly (P<0.05) altered the level of total protein, total free amino acid, glycogen and activity of enzymes acetyl cholinesterase, acid and alkaline phosphatase activity in whole body tissue of Culex quinquefasciatus larvae. The alterations in all these biochemical parameters were significantly (P<0.05) time and dose dependent.

show abstract

Aminotransferase activities and amino acid excretion of bivalve mollusks and brachiopods

Cited by 82 publications

References 15 publications

Amino acid and ammonium utilization by heterotrophic marine bacteria grown in enriched seawater

Amino acid and ammonium utilization by heterotrophic marine bacteria grown in enriched seawater

Some physiological consequences of keepingMytilus edulis in the laboratory

Larvicidal activity and Biochemical Effects of Apigenin against Filarial Vector Culex quinquefasciatus

Contact Info

Product

Resources

About