منابع مشابه
Fresh-water Fish Chemoreceptors Responsive to Dilute Solutions of Electrolytes
I N T R O D U C T I O N The palatal chemoreceptors of the carp display a rather peculiar type of response to varying concentrations of electrolytes (Konishi and Niwa, 1964). Dilute solutions of salts, especially those with polyvalent anions such as Na3citrate and Na 2 HP04 , produced strong responses. However, an increase in concentration depressed receptor activity, although the activity incre...
متن کاملToxicity of Nickel to Fresh Water Fish, Channa
Heavy metals are considered as the most important pollutants of the aquatic environment. In the present study, acute toxicity test was used for the determination of lethal toxicity of Nickel in adult fish, Channa gachua as the test organism. Toxicity test is most reliable for accessing the adverse effect of pollutants on aquatic life. The LC50 values were determined and observed that the values...
متن کاملParasitic adaptation of fresh water fish, Channa Striatus
The thorny headed acanthocephan, Pallisentis nagapurensis infects the intestine of fresh water murrel, Channa striatus. This parasite broughts severe histopathological changes in the intestine includes mucosa and submucosa are completely disrupted, thickened lamina propria, damage of epithelial cells, mucosa folds clumped. The intestinal villi of the mucosa shrinked, infected intestine often en...
متن کاملHow to Care for Implanted Ports
Implantable ports are used for intravenous infusion therapy and play an important role in management of oncology patients. These ports are best suited for patients requiring long-term therapy (>4 weeks). Implanted ports provide reliable venous access protect peripheral access increase patients’ comfort through reducing repeated and difficult vein punctures allow for safe and comfortable admi...
متن کاملEnrichment of fish eggs with ascorbic acid
Success in aquaculture depends on the mass production and quality of juveniles. However, many fish species suffered high losses during the early stages of development. Therefore, in order to decrease mortality, produce a large number of healthy larvae is a fundamental issue. On the other hand, one of the micronutrients that can be effective in larvae health is ascorbic acid. During the embryoni...
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ژورنال
عنوان ژورنال: Scientific American
سال: 1907
ISSN: 0036-8733
DOI: 10.1038/scientificamerican11161907-314supp