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Author: search.filters.author.Natarajan G M

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    ACTIVITY LEVELS OF PHOSPHATASES OF THE AIR-BREATHING CATFISH MYSTUS CAVASIUS EXPOSED TO ELECTROPLATING INDUSTRIAL EFFLUENT CHROMIUM.
    (BLM, International, Open-Access Journal, 2012-07-01) Palanisamy P; Sasikala G; Mallikaraj D; Bhuvaneshwari N; Natarajan G M
    In India chromium is widely used in all electroplating industries. Chromium in electroplating industrial effluent has been shown to inhibit many enzymes at different segments of metabolism. Chromium especially inhibits pyruvate oxidases system and phosphatases. The present study was undertaken to evaluate the effect of effluent chromium on phosphatases on exposure to sub-lethal concentration (0.25%) for a period of 24, 48, and 72 h and 15 d. Activity levels of acid phosphatase and alkaline phosphatase decreased significantly in the gill and air bladder tissues of experimental catfish, Mystus cavasius, when compared with that of controls.
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    METASYSTOX INDUCED HAEMATOLOGICAL MODULATION IN THE SOUTH INDIAN SNAKEHEADED CHANNA STRIATA
    (Dr. Shashi Alok, Assistant Professor, Institute of Pharmacy, Bundelkhand University Jhansi (U.P.), India, 2011-04-11) Sasikala G; Palanisamy P; Mallikaraj D; Bhuvaneshwari N; Natarajan G M
    Snakeheaded Channa striata reared in freshwater of metasystox (1.7 mg L-1) for 15 d and 30 d. Evaluation of some of the haematological parameters showed that on exposure, haematocrit content (Ht), haemoglobin content (Hb), total erythrocyte count (RBC), neutrophil, basophil, lymphocyte values markedly increased and depressed monocyte values. Observations of blood parameters allows the most rapid detection changes in fish, which may be used as a diagnostic test for aquatic pollution.
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    STRESS INDUCED NON-SPECIFIC IMMUNE RESPONSE MODEL IN THE EXOTIC FISH, OSPHRONEMUS OLFAX
    (CHIEF EDITOR, Rosane Cavalcante Fragoso, Brasil, an open access publisher, 2011-05-14) Palanisamy P; Sasikala G; Mallikaraj D; Bhuvaneshwari N; Natarajan G M
    Results obtained using multifactorial stress model (air-exposure, submergence, hypoxia) showed that elevation of RBC, HB, Ht and blood glucose was linearly correlated with progressive stress uniformly. Submergence caused rapid stress with blood glucose reaching 50% elevation within 60 min. Hypoxic water with access to air had very little effect on blood glucose. Similarly, lowering the temperature significantly affected the blood parameters. The air-exposure model was also used for testing lysozyme activity and phagocytosis assay during stress. Plasma lysozyme was significantly lower in air stressed fish. Submergence increased the number of granulocyte, lymphocytes and activity of phagocytic cells. Spleen and kidney lysozyme activity increased significantly. The titer of total non-specific immunological increased during submergence. But no such effect was observed in air-exposure. These results suggest that submergence stress in stimulating non-specific defense system in the air-breathing fish, Osphronemus olfax. This is the first report that submergence stress is playing the role of an immunomodulator in an air-breathing fish.
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    HISTOPATHOLOGICAL LESIONS IN GILL OF AIR-BREATHING CAT FISH MYSTUS CAVASIUS EXPOSED TO ELECTROPLATING INDUSTRIAL EFFLUENT NICKEL
    (Fortune Journals, an open access publisher, 2011-04) Palanisamy P; Sasikala G; Mallikaraj D; Bhuvaneshwari N; Natarajan G M
    The gill which participate in many important functions in fish, such as respiration, osmoregulation and excretion. Electroplating industrial effluent nickel induced hyperplasia, multiple telangiectases (aneurysms), desquamation of the epithelial cells, complete fusion of secondary gill lamellae and congestion of blood sinuses were the significant histopathological lesions observed in the gill of Mystus cavasius.
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    HAEMATOLOGICAL CHANGES OF FRESH WATER FOOD FISH, CHANNA STRIATA ON EXPOSURE TO CLEISTANTHUS COLLINUS SUICIDAL PLANT EXTRACT
    (Dr. Sridevi M, India, 2011-04) Palanisamy P; Sasikala G; Mallikaraj D; Bhuvaneshwari N; Natarajan G M
    The freshwater fish Channa striata were exposed to lethal concentration of Cleistanthus collinus plant extract (10 mg L-1) 48 h. At the end of the 48 h exposure period, blood samples were taken from the control and experimental fish. Blood was assayed for selected haematological parameters (haematocrit, haemoglobin, red blood cell counts, white blood cells counts and erythrocyte sedimentation rate). The derived haematological indices of mean corpuscular volume (MCV), mean corpuscular haemoglobin (MCH) and mean corpuscular haemoglobin concentration were calculated. Significant decreases observed RBC (P<0.05), Hb content (P<0.01) PCV (P<0.01) WBC (P<0.05) were observed during the exposure period.
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    STUDY OF BEHAVIOURAL RESPONSE OF AIR-BREATHING CATFISH MYSTUS CAVASISUS (HAMILTON) EXPOSED TO ELECTROPLATING INDUSTRIAL EFFLUENT CHROMIUM
    (Dr. Shashi Alok, Assistant Professor, Institute of Pharmacy, Bundelkhand University Jhansi (U.P.), India, 2011-07-01) Palanisamy P; Sasikala G; Mallikaraj D; Natarajan G M
    In the present experiment effect of electroplating industrial effluent chromium on the behavioral responses of freshwater air-breathing cat fish Mystus cavasius was studied. The toxicity of chromium to aquatic life is strongly influenced by the form of chromium and quality of water. The two most prevalent chromium forms found in plating industry waste water are hexavalent chromium (Cr+6) and trivalent chromium (Cr+3). The fishes exhibited various behavioral responses – locomotory, physiological, neurological and morbidity responses under influence of chromium industrial effluent. One of the major advantages of using data on behavioral effects is that they are more sensitive indicators of potential for impacts on survival in the filed than are measures of lethality. Study noted the possible utility of the behavior responses as rapid biomonitory assessment technique for qualitative evaluation of various industrial pollutants.
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    BIOCHEMICAL MODULATIONS INDUCED BY METASYSTOX IN FRESH WATER SNAKEHEADED FISH CHANNA STRIATA BLOOD
    (BRNSS Publication Hub, Mandsaur University, Madhya Pradesh, India, 2011-04-10) Sasikala G; Palanisamy P; Mallikaraj D; Bhuvaneshwari N D; Natarajan G M
    Metasystox is one of the pesticides extensively used in agricultural practices throughout the world. Channa striata were exposed to sublethal concentrations (5 mg L-1) of metasystox for 15 d to assess the alterations in the level of blood glucose, lactate, sodium and potassium in blood plasma. Significant alterations in all the biochemical parameters were found to be dose dependent. Elevated levels of blood glucose and depressed lactate, sodium and potassium in blood further indicated lower metabolic rate after 15 d of exposure. Significant decline in triglycerides content was observed in fish exposed to both sublethal concentrations of metasystox. It was concluded that metasystox is poisonous and had a significant effect on the behaviour and biochemical system, which adversely affected the health of the fish. The authors suggested that increase in glucose (hyperglycaemia) which was dose and duration dependent in the sub lethal exposure to metasystox may be considered to be manifestation of stress induced by the toxicants and analysis of biochemical parameters in the fish blood may serve as us eful indices in environmental biomonitoring.
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    ACETYLCHOLINE ESTERASE, ACETYLCHOLINE, SUCCINIC DEHYDROGENASE AND LACTIC DEHYDROGENASE CHANGES IN THE FRESH WATER FOOD FISH CHANNA STRIATA AFTER EXPOSURE TO CLEISTANTHUS COLLINUS SUICIDAL PLANT EXTRACT
    (Global Research Online, Bangalore, India, 2011-07-01) Palanisamy P; Mallikaraj D; Sasikala G; Natarajan G M
    Abstract: The enzymes Acetylcholinesterase (AchE), Acetylcholine (Ach), Succinic dehydrogenase (SDH) and Lactatedehydrogenase (LDH) are used as biological markers in the present study. Enzymes are highly sensitive and used to evaluate the biological effects of suicidal plant extract Cleistanthus collinus in freshwater food fish Channa striata. A significant increase in the Ach, LDH and SDH activity in muscle, liver and gill were observed. The AchE activity significantly declined by -49.80% liver, -45.00% gills and -38.03% in liver.
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    ELECTROPLATING INDUSTRY EFFLUENT INDUCED MODULATION OF AMINOTRANSFERASE ACTIVITY IN THE FRESHWATER TELEOST FISH MYSTUS CAVASIUS
    (BRNSS Publication Hub, Mandsaur University, Madhya Pradesh, India, 2011-03-02) Palanisamy P; Mallikaraj D; Sasikala G; Natarajan G M
    Electroplating industry effluent exposure (1%) for 48 h increased the AlAT and AAT contents in the brain, gill, liver and muscle of Mystus punctata. Both protein and carbohydrate metabolism was affected. Alanine aminotransferase (AAT E.C. 2.6.1.2) and aspartate aminotransferase (AAT E.C. 2.6.1.1) play a crucial role in transamination reactions and can be used as potential biomarkers to indicate hepatotoxicity and cellular damage
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    EFFECT OF ELECTROPLATING INDUSTRIAL EFFLUENT CHROMIUM ON BIMODAL RESPIRATORY RHYTHM OF THE AIR-BREATHING CAT FISH MYSTUS CAVASIUS (HAM.)
    (BRNSS Publication Hub, Mandsaur University, Madhya Pradesh, India, 2011-03-10) Palanisamy P; Mallikaraj D; Sasikala G; Bhuvaneshwari N; Natarajan G M
    Effect of sublethal (0.25%) concentration of electroplating Industrial effluent chromium on bimodal respiratory rhythm of Mystus cavasius (Ham) was studied. Result revealed that at sublethal concentration the respiratory rhythm was significantly disrupted. The significance of the results is discussed from a chronotoxicological point of view.