scholarly journals Acute Toxicity of Tuber Peels of Tacca leontopetaliodes on the Biochemistry and Histology of Gills and Liver of Clarias gariepinus Juveniles

2020 ◽  
Vol 4 (3) ◽  
Author(s):  
Bala S. Audu ◽  
Jamiu O. Omirinde ◽  
Audu I. Wakawa ◽  
Ibrahim A. Dalhatu ◽  
Jacinta B. Sale
Keyword(s):  
Carbon Dioxide ◽  
Acute Toxicity ◽  
Dissolved Oxygen ◽  
Histopathological Examination ◽  
Clarias Gariepinus ◽  
Aquatic Organisms ◽  
Free Carbon ◽  
Range Finding ◽  
Free Carbon Dioxide ◽  
Peel Extract

Background: Increased rate of water pollution has detrimental effects on the health of fish and other aquatic organisms. This invariably affects humans by causing food insecurity, hunger and poverty. In an effort to curb this menace, this study investigated the effects of crude tuber peel extract of Tacca leontopetaliodes on the biochemical and histological parameters of Clarias gariepinus. Methods: Acute toxicity (96 hr . LC50) test was conducted after a range finding test from which definitive test concentrations of 5.00, 4.00, 3.00, 2.00, and 1.00 g/L were obtained with 0.00 g/L as control. One hundred and twenty (120) mixed sex C. gariepinus fingerlings (mean weight, 12.5 g ± 0.5; length, 13.2 cm ± 0.5) were administered definitive concentrations of crude tuber peel extract in duplicate replication. Water quality parameters (pH, dissolved oxygen, free carbon dioxide, alkalinity), tissue enzymes (Alkaline phosphatase (ALP), Alanine Aminotransferase (ALT), Aspartate Aminotransferase (AST) and histopathological assessments were analysed using standard procedures. Results: Physico-chemical parameters (pH, dissolved oxygen, free carbon dioxide and alkalinity) of test tanks containing graded concentrations of T. leontopetaliodes were significantly altered (p<0.05) compared to the control tank. Similarly, the profile of hepatic enzymes (ALP, AST and ALT) displayed marked progressive dose-dependent increase levels relative to the control. Histopathological examination revealed graded deterioration of gills and liver architecture with increase in the strength of the extract T. leontopetaliodes Conclusion: The crude tuber peel extract of T. leontopetaliodes is toxic to fish, thus, washing, processing and discard of T. leontopetaliodes in and around riparian systems should be discouraged.

scholarly journals Monthly and diurnal variations of limnological conditions of two ponds

2017 ◽  
Vol 7 (1) ◽  
pp. 14-20
Author(s):  
AKM Fazlur Rahaman ◽  
MA Mansur ◽  
M Shahidur Rahman
Keyword(s):  
Carbon Dioxide ◽  
Dissolved Oxygen ◽  
Research Work ◽  
Diurnal Variations ◽  
Free Carbon ◽  
Total Alkalinity ◽  
Diurnal Changes ◽  
University Campus ◽  
Physico Chemical ◽  
Free Carbon Dioxide

A study on monthly and diurnal changes of limnological conditions of two ponds was conducted in the Bangladesh Agricultural University campus, Mymensingh. The research work was performed by studying the limnological parameters such as transparency, temperature, dissolved oxygen, free carbon dioxide, pH, total alkalinity, nitrate-nitrogen, phosphate-phosphorus and plankton. Diurnal variations of physico-chemical factors were studied fortnightly at 6 hrs intervals at 6 a.m., 12 noon, 6 p.m. and 12 midnight. The amounts of transparency, dissolved oxygen and pH were higher during winter months than in summer months in both the ponds. Transparency, water temperature, total alkalinity, NO3-N and PO4-P were higher during summer months than in winter months in both the ponds. But the amount of free carbon dioxide was higher during winter months than in summer months in pond 1 while in pond 2 the amount of free carbon dioxide was higher during summer months than in winter months. Qualitative and quantitative monthly variations of phytoplankton and zooplankton were observed in both the ponds during the study period. The highest amount of dissolved oxygen, pH and total alkalinity were recorded at 6 p.m. and the lowest amounts of those at 6 a.m. in both the ponds. The highest temperature was recorded at 12 noon and the lowest at 12 midnight. But the highest amount of free carbon dioxide was recorded at 6 a.m. and the lowest at 6 p.m. in both the ponds. All the factors showed appreciable diel variations throughout the study period, which indicate that the ponds are productive.Int. J. Agril. Res. Innov. & Tech. 7 (1): 14-20, June, 2017

Influence of Dissolved Oxygen and Carbon Dioxide on Swimming Performance of Largemouth Bass and Coho Salmon

1968 ◽  
Vol 25 (1) ◽  
pp. 49-70 ◽  
Author(s):  
Michael L. Dahlberg ◽  
Dean L. Shumway ◽  
Peter Doudoroff
Keyword(s):  
Carbon Dioxide ◽  
Dissolved Oxygen ◽  
Oxygen Concentration ◽  
Swimming Speed ◽  
Largemouth Bass ◽  
Coho Salmon ◽  
Free Carbon ◽  
Carbon Dioxide Concentrations ◽  
Free Carbon Dioxide ◽  
Oxygen Concentrations

The final swimming speed of juvenile largemouth bass, Micropterus salmoides (Lacépède), was reduced markedly at oxygen concentrations below 5 or 6 mg/liter in tests at 25 C in a tubular chamber in which the velocity of water was increased gradually, at 10-min intervals, until the fish were forced by the current permanently against a screen. At levels above 6 mg/liter, the final swimming speed was virtually independent of the oxygen concentration. The performance of bass that had been acclimated overnight to elevated carbon dioxide levels was not materially affected by the highest tested concentrations of free carbon dioxide, averaging 48 mg/liter, at any tested level of dissolved oxygen.For juvenile coho salmon, Oncorhynchus kisutch (Walbaum), at temperatures near 20 C and carbon dioxide concentrations near 2 mg/liter, any considerable reduction of the oxygen concentration from about 9 mg/liter, the air-saturation level, resulted in some reduction of the final swimming speed. The performance of the salmon was impaired much more markedly than was that of the bass by the same reduction of the oxygen concentration. At oxygen concentrations near and above the air-saturation level, high concentrations of free carbon dioxide averaging 18 and 61 mg/liter had a depressing effect on the final swimming speed of coho salmon even after overnight acclimation. However, this effect decreased at reduced oxygen concentrations. No measurable effect of free carbon dioxide concentrations near 61 mg/liter was evident at 2 mg/liter dissolved oxygen, and concentrations near 18 mg/liter had little or no effect even at moderately reduced dissolved oxygen levels after overnight acclimation of the salmon to these carbon dioxide concentrations.

scholarly journals The Effect of Free Carbon Dioxide on Copper-corrosion Behavior

2003 ◽  
Vol 52 (5) ◽  
pp. 259-266
Author(s):  
Kazuharu Sobue ◽  
Shin'ichi Magaino ◽  
Akifumi Sugahara ◽  
Hachiro Imai
Keyword(s):  
Carbon Dioxide ◽  
Corrosion Behavior ◽  
Free Carbon ◽  
Copper Corrosion ◽  
Free Carbon Dioxide

Efficient Solvent-Free Carbon Dioxide Fixation Reactions with Epoxides Under Mild Conditions by Mixed-Ligand Zinc(II) Metal-Organic Frameworks

ChemCatChem ◽  
2018 ◽  
Vol 10 (11) ◽  
pp. 2401-2408 ◽  
Author(s):  
Parth Patel ◽  
Bhavesh Parmar ◽  
Rukhsana I. Kureshy ◽  
Noor-ul Khan ◽  
Eringathodi Suresh
Keyword(s):  
Carbon Dioxide ◽  
Metal Organic Frameworks ◽  
Carbon Dioxide Fixation ◽  
Mixed Ligand ◽  
Free Carbon ◽  
Solvent Free ◽  
Mild Conditions ◽  
Free Carbon Dioxide ◽  
Metal Organic

scholarly journals Changes of physicochemical and microbiologicalparameters of infiltration water at Debina intake in Poznan, unique conditions – a flood

2018 ◽  
Vol 30 ◽  
pp. 01004
Author(s):  
Sylwia Kołaska ◽  
Joanna Jeż – Walkowiak ◽  
Zbysław Dymaczewski
Keyword(s):  
Carbon Dioxide ◽  
Water Quality ◽  
Dissolved Oxygen ◽  
River Water ◽  
Quality Parameters ◽  
Total Hardness ◽  
Infiltration Process ◽  
Number Of Microorganisms ◽  
Free Carbon Dioxide ◽  
Iron Manganese

The paper presents characteristics of Debina infiltration intake which provides water for Poznan and neighbouring communes. The evaluation of effectiveness of infiltration process has been done based on the quality parameters of river water and infiltration water. The analysed water quality parameters are as follows: temperature, iron, manganese, DOCKMnO4, TOC, turbidity, colour, dissolved oxygen, free carbon dioxide, conductivity, total hardness, carbonate hardness, pH, heavy metals, detergents and microorganisms. The paper also includes an assessment of the impact of flood conditions on the quality of infiltration water and operation of infiltration intake. In this part of the paper the following parameters were taken into account: iron, manganese, DOCKMnO4, TOC, turbidity, colour, dissolved oxygen, free carbon dioxide, conductivity, total hardness, the total number of microorganisms in 36°C (mesophilic), the total number of microorganisms in 22°C (psychrophilic), coli bacteria, Clostridium perfringens, Escherichia coli, Enterococci. Analysis of the effects of flood on infiltration process leads to the following conclusions: the deterioration of infiltration water quality was due to the deterioration of river water quality, substantial shortening of groundwater passage and partial disappearance of the aeration zone. The observed deterioration of infiltration water quality did not affect the treated water quality, produced at water treatment plant.

Solvent‐ and Catalyst‐Free Carbon Dioxide Capture and Reduction to Formate with Borohydride Ionic Liquid

ChemSusChem ◽  
2020 ◽  
Vol 13 (8) ◽  
pp. 2025-2031 ◽  
Author(s):  
Loris Lombardo ◽  
Heena Yang ◽  
Kun Zhao ◽  
Paul J. Dyson ◽  
Andreas Züttel
Keyword(s):  
Carbon Dioxide ◽  
Ionic Liquid ◽  
Carbon Dioxide Capture ◽  
Free Carbon ◽  
Catalyst Free ◽  
Free Carbon Dioxide
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