Biochemical Studies on Marine Zooplankton: I. The Biochemical Composition of Neomysis integer

1964 ◽  
Vol 28 (3) ◽  
pp. 354-363 ◽  
Author(s):  
J. E. G. Raymont ◽  
J. Austin ◽  
E. Linford
Keyword(s):  
Biochemical Composition ◽  
Neomysis Integer ◽  
Marine Zooplankton ◽  
Biochemical Studies

Biochemical Studies on Marine Zooplankton XII. Further Investigations on Euphausia Superba Dana

1974 ◽  
Vol 54 (3) ◽  
pp. 719-725 ◽  
Author(s):  
C. F. Ferguson ◽  
J. K. B. Raymont
Keyword(s):  
Lipid Content ◽  
Biochemical Composition ◽  
Antarctic Krill ◽  
Euphausia Superba ◽  
Detailed Examination ◽  
Marine Zooplankton ◽  
Biochemical Studies ◽  
The Mean ◽  
The Antarctic ◽  
Good Agreement

Interest has developed recently in the biochemical composition of zooplankton, particularly in relation to seasonal changes. An earlier study (Raymont, Srinivasagam & Raymont, 1971b) on deep frozen Antarctic krill, Euphausia superba, collected over approximately 5 weeks in December/January 1968/69 suggested that protein was the main constituent and lipid much more variable. Despite the variability the mean lipid content during January was distinctly higher than in the previous month, thus supporting the findings of Kryuchkova & Makarov (1969) that lipid content of krill tends to increase as the summer advances. However, collections of material from the Antarctic have tended to be limited both in location and season while methods of preservation have varied. It seemed desirable to follow changes in the biochemical composition of krill collected from a somewhat wider area and over a longer period. Moreover, the more extensive material gave opportunity for a more detailed examination of specific fractions, such as the amino acids of Euphausia superba. Preliminary investigations (Srinivasagam, Raymont, Moodie & Raymont, 1971) on the amino acid composition of protein hydrolysates showed good agreement with the results of some other authors. However, the findings of Burkholder, Mandelli & Centeno (1967) and especially of Moiseev (1970) showed certain differences.

Biochemical Studies on Marine Zooplankton X.The Amino Acid Composition of Euphausia Superb a, Meganyctiphanes Norvegicaand Neomysis Integer

1971 ◽  
Vol 51 (4) ◽  
pp. 917-925 ◽  
Author(s):  
R. T. Srinivasagam ◽  
J. E. G. Raymont ◽  
C. F. Moodie ◽  
J. K. B. Raymont
Keyword(s):  
Amino Acids ◽  
Amino Acid ◽  
Amino Acid Composition ◽  
Acid Composition ◽  
Euphausia Superba ◽  
Zooplankton Species ◽  
Neomysis Integer ◽  
Marine Zooplankton ◽  
Biochemical Studies ◽  
Degree Of Similarity

The amino acid composition has been investigated in two euphausiids, Euphausia superba Dana and Meganyctiphanes norvegica (M. Sars), and one mysid, Neomysis integer Leach. Protein-bound amino acids show a very considerable degree of similarity: glutamic acid, aspartic acid, lysine, leucine and arginine are predominant in all three crustaceans, and occur in that order of importance. Together they amount to ~ 50% of the total protein hydrolysates. Concentrations of free amino acids show greater differences between the zooplankton species, but taurine, glycine and arginine are very important in all three. Lysine and ornithine occur in fair quantities in both euphausiids, and proline and alanine are moderately important in Euphausia superba and Neomysis integer.

Biochemical Studies on Marine Zooplankton V. The Composition of the Major Biochemical Fractions in Neomysis Integer

1968 ◽  
Vol 48 (3) ◽  
pp. 735-760 ◽  
Author(s):  
J. E. G. Raymont ◽  
J. Austin ◽  
E. Linford
Keyword(s):  
Protein Content ◽  
Brackish Water ◽  
Total Protein ◽  
Dry Weight ◽  
High Protein ◽  
Neomysis Integer ◽  
High Protein Content ◽  
Marine Zooplankton ◽  
Biochemical Studies

The earlier investigations (Raymont, Austin & Linford, 1964, 1966) on the brackish-water, semi-planktonic mysid, Neomysis integer (Leach), dealt with the total protein, lipid and carbohydrate fractions, together with chitin and ash. Results showed that a relatively high protein content (mean 71 % dry weight) was typical of Neomysis; the protein showed very little change throughout the year. Lipid was much lower and more variable (7–15%; mean 13 % dry weight), and carbohydrate was especially low (mean 2.5 % dry weight). Ash and chitin together amounted to some 14 % dry weight (Raymont et al., 1966).

Antenatal Diagnosis

1969 ◽  
Vol 14 (8) ◽  
pp. 277-281 ◽  
Author(s):  
A. E. H. Emery ◽  
M. M. Nelson ◽  
G. Gordon ◽  
D. Burt
Keyword(s):  
High Risk ◽  
Amniotic Fluid ◽  
Early Pregnancy ◽  
Genetic Disease ◽  
Biochemical Composition ◽  
Antenatal Diagnosis ◽  
Sex Chromatin ◽  
Biochemical Studies ◽  
Important Approach ◽  
Exciting Development

The diagnosis of genetic disease in utero in early pregnancy is a new and exciting development with important applications in the management of families with a high risk of producing a child with an hereditary disorder. Techniques currently under investigation are briefly reviewed and include sex chromatin, cytogenetic and biochemical studies on amniotic fluid cells and the biochemical composition of amniotic fluid. The study of amniotic fluid and its contained cells would seem to offer a promising and important approach to the prevention of genetic disease.

BIOCHEMICAL STUDIES ON THE PRODUCTION OF MARINE ZOOPLANKTON

1968 ◽  
Vol 43 (4) ◽  
pp. 393-426 ◽  
Author(s):  
E. D. S. CORNER ◽  
C. B. COWEY
Keyword(s):  
Marine Zooplankton ◽  
Biochemical Studies

scholarly journals Biochemical Studies on edible oysters Crassostrea madrasensis and Saccostrea cucullata.

2021 ◽  
Vol 9 (3) ◽  
Author(s):  
Packiam Paul ◽  
Chelladurai Stella ◽  
J Siva
Keyword(s):  
Biochemical Composition ◽  
Tissue Sample ◽  
Reproductive Activity ◽  
Strong Positive Correlation ◽  
Positive Correlation ◽  
Gamete Formation ◽  
Saccostrea Cucullata ◽  
Marine Bivalves ◽  
Biochemical Studies ◽  
Biochemical Components

n general, changes in biochemical components are closely linked to the state of sexual maturity of the mollusks and to energy supply, either directly from ingested food or from previously stored reserves. Carbohydrates are considered to be the main energy source in adult marine bivalves and are important for gamete formation and maintenance of adult condition during periods of nutritive stress or in winter. Many studies have related changes in the biochemical composition of bivalves with the reproductive cycle mostly in the natural environment. Energy storage and biochemical cycle are closely related to reproductive activity in marine bivalves. The present study indicates that major biochemical constituents in oyster Crassostrea madrasensis and Saccostrea cucullate are significantly influenced by environment condition such as quantity of food availability, temperature and salinity. The high contents of lipids, proteins, carbohydrates, and water content values, during summer are indicating this season as the best for harvesting this particular oyster species and the statistical analysis of the biochemical composition of the tissue sample of the oyster revealed positive correlation in both species of oyster Crassostrea madrasensis and Saccostrea cucullata. The strong Positive Correlation were observed in between the two stations and the highest value of protein, carbohydrate and lipids were observed in Crassostrea madrasensis rock and creek when it compare to Saccostrea cucullata. Keywords: Protein, Carbohydrate, Lipid , Crassostrea madrasensis, Saccostrea cucullata, oysters

Biochemical Studies on edible oysters Crassostrea madrasensis and Saccostrea cucullata.

2021 ◽  
Author(s):  
Packiam Paul ◽  
Chelladurai Stella ◽  
J Siva
Keyword(s):  
Biochemical Composition ◽  
Tissue Sample ◽  
Reproductive Activity ◽  
Strong Positive Correlation ◽  
Positive Correlation ◽  
Gamete Formation ◽  
Saccostrea Cucullata ◽  
Marine Bivalves ◽  
Biochemical Studies ◽  
Biochemical Components

In general, changes in biochemical components are closely linked to the state of sexual maturity of the mollusks and to energy supply, either directly from ingested food or from previously stored reserves. Carbohydrates are considered to be the main energy source in adult marine bivalves and are important for gamete formation and maintenance of adult condition during periods of nutritive stress or in winter. Many studies have related changes in the biochemical composition of bivalves with the reproductive cycle mostly in the natural environment. Energy storage and biochemical cycle are closely related to reproductive activity in marine bivalves. The present study indicates that major biochemical constituents in oyster Crassostrea madrasensis and Saccostrea cucullate are significantly influenced by environment condition such as quantity of food availability, temperature and salinity. The high contents of lipids, proteins, carbohydrates, and water content values, during summer are indicating this season as the best for harvesting this particular oyster species and the statistical analysis of the biochemical composition of the tissue sample of the oyster revealed positive correlation in both species of oyster Crassostrea madrasensis and Saccostrea cucullata. The strong Positive Correlation were observed in between the two stations and the highest value of protein, carbohydrate and lipids were observed in Crassostrea madrasensis rock and creek when it compare to Saccostrea cucullata.Keywords: Protein, Carbohydrate, Lipid , Crassostrea madrasensis, Saccostrea cucullata, oysters

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