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Biochemical Assessment of Selected Fresh Fish
Biochemical Assessment of Selected Fresh Fish
Biochemical Assessment of Selected Fresh Fish
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Ten fresh fish samples of different species (Mugil cephalus, Setipinna phasa, Coilia dussumieri, Scatophagus argus, Sillanopsis panijus, Arius caelatus, Hilsa ilisha, Polynemus paradiseus, Platicephalus indicus and Pelamys chiliensis) collected from Kuakata, Bangladesh were assessed biochemically (proximate composition, total volatile basic nitrogen, tri-methyl amine and pH). Moisture content of fresh fish varied over a range from 65.33 to 78.92%. Likewise, protein (8.58 to 19.06%), fat (6.12 to 12.99%) and ash (1.07 to 8.41%) content indicated wide variation in the ten fresh fish analysed. TVB-N and TMA-N values of fresh fish were found ranging between 10.920.23 to 25.750.80 mg N 100
g-1 and
7.700.67 to 18.500.77, respectively. The values of pH of the samples ranged from 7.030.05 to 6.70.07.
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Other Articles:
| • | Mitochondrial concept of leukemogenesis: key role of oxygen-peroxide effects |
| Background and hypothesis: The high sensitivity of hemopoietic cells, especially stem cells, to radiation and to pro-oxidative and other leukemogenic agents is related to certain of their morphological and metabolic features. It is attributable to the low (minimal) number of active mitochondria and the consequently slow utilization of O2 entering the cell. This results in an increased intracellular partial pressure of O2 (pO2) and increased levels of reactive oxygen (ROS) and nitrogen (RNS) species, and a delta (PO - O) imbalance between the pro-oxidative (PO) and antioxidative (AO) constituents. Proposed mechanism: Because excessive O2 is toxic, we suggest that hemopoietic cells exist in a kind of unstable dynamic balance. This suggestion is based on the idea that mitochondria not only consume O2 in the process of ATP production but also constitute the main anti-oxygenic stage in the cell's protective antioxidative system. Variations in the mitochondrial base capacity (quantity and quality of mitochondria) constitute an important and highly efficient channel for regulating the oxidative stress level within a cell. The primary target for leukemogenic agents is the few mitochondria within the hemopoietic stem cell. Disturbance and weakening of their respiratory function further enhances the initial pro-oxidative state of the cell. This readily results in peroxygenation stress, creating the necessary condition for inducing leukemogenesis. We propose that this is the main cause of all related genetic and other disorders in the cell. ROS, RNS and peroxides act as signal molecules affecting redox-sensitive transcription factors, enzymes, oncogenes and other effectors. Thereby, they influence the expression and suppression of many genes, as well as the course and direction of proliferation, differentiation, leukemogenesis and apoptosis. Differentiation of leukemic cells is blocked at the precursor stage. While the transformation of non-hemopoietic cells into tumor cells starts during proliferation, hemopoietic cells become leukemic at one of the interim stages in differentiation, and differentiation does not continue beyond that point. Proliferation is switched to differentiation and back according to a trigger principle, again involving ROS and RNS. When the leukemogenic delta L(PO -O) imbalance decreases in an under-differentiated leukemia cell to the differentiation level delta D(PO -O), the cell may continue to differentiate to the terminal stage. Conclusions: The argument described in this article is used to explain the causes of congenital and children's leukemia, and the induction of leukemia by certain agents (vitamin K3, benzene, etc.). Specific research is required to validate the proposals made in this article. This will require accurate and accessible methods for measuring and assessing oxidative stress in different types of cells in general, and in hemopoietic cells in particular, in their different functional states. | |
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| • | Structural Genomics Consortium: Chief Scientist (UK) |
| Chief Scientist (UK), Structural Genomics Consortium, London, United Kingdom. Posted on 25 July 2007. | |
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| • | Shrimp trawling may boost mercury in red snapper, study suggests |
| (Dick Jones Communications) Shrimp trawling in the Gulf of Mexico may be raising the level of toxic mercury in juvenile Red Snapper, according to new research from Texas Christian University and Louisiana State University. | |
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| • | Stereo Microscopes On Sale |
| Microscopes.com,Stereo Microscopes, ... Stereomicroscopes are used extensively throughout the many fields of microscopy. | |
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Journal of Biological Sciences
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By editor@_DOMAIN - Copyright © 2008 Microsoft. All rights reserved. These XML results may not be used, reproduced or transmitted in any manner or for any purpose other than rendering Live Search results within an RSS aggregator for your personal, non-commercial use. Any other use of these results requires express written permission from Microsoft Corporation. By accessing this web page or using these results in any manner whatsoever, you agree to be bound by the foregoing restrictions. - version: v1.5 build A