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排序方式: 共有184条查询结果,搜索用时 93 毫秒
71.
Goswami J Pandey RK Tewari JP Goswami BK 《Journal of environmental science and health. Part. B》2008,43(3):237-240
Management of root knot nematode disease infecting tomato, by the use of fungal bioagents Acremonium strictum and Trichoderma harzianum isolated from egg masses of M. incognita infecting tomato has been carried out. The rhizosphere and rhizoplane of root knot nematode infested tomato revealed consistent association of Acremonium strictum. In the present study A. strictum and other fungal bioagents viz. Aspergillus niger, Paecilomyces lilacinus, Rhizoctonia solani and Trichoderma harzianum isolated earlier from egg-masses of M. incognita, identified and maintained have been investigated through in-vitro and in-vivo trials for their potentiality against M. incognita. Out of the above, isolated mycoflora A. niger was identified to be toxic against M. incognita while A. strictum and T. harzianum was found to possess both egg parasitic or opportunistic and toxic properties. A field trial with all the above fungal bioagents both alone and together showed significant promising performance by the dual treatment of A. strictum and T. harzianum in improving the health of the tomato plant with a remarkable reduction in M. incognita population. 相似文献
72.
Removal of chromium (Cr) from tannery effluents by recovery of metal also reduces the ecotoxicological impact. To develop such a process, columns packed with calcium alginate (CA) beads with or without humic acid (HA) have been used as an adsorbent and tannery effluent was passed through it. Concentration of Cr in beads and in different fractions collected after adsorption was measured. Change in total organic carbon content during the process was also noticed. The fractions were also tested for toxicity towards Microtox assay. EC(50) values were determined with the help of Microtox analyser 500. Data showed that the CA beads along with HA could be effectively utilised in removal of 54% Cr and also in reducing the toxicity (EC(50) (%) in 5 min=>100 in fractions collected after 72 h). 相似文献
73.
Jitendra Pandey Usha Pandey Anand V. Singh Deepa Jaiswal Ekabal Siddiqui Kavita Verma 《Chemistry and Ecology》2018,34(5):422-438
We investigated the possible drivers of the N:P stoichiometric shift and its relationship with micro-algal production of transparent exopolymeric particles (TEP) along a 35?km gradient of the Ganga River. The objective was to evaluate if the trade-off between N:P stoichiometry and production of TEP helps in maintaining water quality of the river. Mesocosm experiments were conducted to examine N:P-TEP linkages and its role in turbidity removal. In situ measurements did not show Si to be a limiting nutrient (N:Si?1.3). The TEP production increased with decreasing N:P ratio and peaked at N:P::6:1 with dominance of Aulacosira granulata and Fragilaria intermedia. Settling efficiency, turbidity removal and sedimentation of TEP, biogenic silica (BSi) and biomass all increased with decreasing N:P ratio proportionately to the amount of TEP produced in the mesocosm. The study demonstrates that trade-off between N:P stoichiometry and the production of TEP generates feedback to buffer the ecological impacts of nutrient pollution. 相似文献
74.
Environmental Chemistry Letters - The continuous growth of the world population has raised heatlh issues such as the inefficiency of common drugs, such as antibiotics, due to... 相似文献
75.
76.
People perceive places differently because of the different material, social, and symbolic aspects of the locations and because individuals have different backgrounds and different reasons for being at the locations. Two studies examined how role and religious beliefs affect perceptions of the environment at the Magh Mela, an annual religious festival at the confluence of the Ganges and Yamuna Rivers in north India. In the first study (n=375), we interviewed individuals who were at the Mela for one of six reasons (religious pilgrims, sweepers, boatmen, police, businessmen, or student volunteers) about their religious beliefs and their perceptions of the Mela. Results indicated that the evaluations of pilgrims, who were at the Mela for religious reasons, were associated with evaluations of physical amenities and religious social support, whereas the other five groups, who were at the Mela primarily for nonreligious purposes, evaluated the Mela on the basis of material characteristics only. In the second study (n=311), we found that religious leaders’ evaluations of the Mela were affected by material characteristics, religious social support, and intrinsic religious belief. 相似文献
77.
Alkindi Khalifa M. Mukherjee Kaustuv Pandey Manish Arora Aman Janizadeh Saeid Pham Quoc Bao Anh Duong Tran Ahmadi Kourosh 《Environmental science and pollution research international》2022,29(14):20421-20436
Environmental Science and Pollution Research - Nitrate is a major pollutant in groundwater whose main source is municipal wastewater and agricultural activities. In the present study, Bayesian... 相似文献
78.
Kumar Devendra Pandey Aseesh Rawat Sandeep Joshi Mayank Bajpai Rajesh Upreti Dalip Kumar Singh Surendra Pratap 《Environmental science and pollution research international》2022,29(41):61579-61593
Environmental Science and Pollution Research - Himalaya, the highest mountain system in the world and house of important biodiversity hotspot, is sensitive to projected warming by climate change.... 相似文献
79.
Kumari V Rathore G Chauhan UK Pandey AK Lakra WS 《Journal of environmental biology / Academy of Environmental Biology, India》2011,32(2):153-159
Seasonal changes in abundance of nitrifiers (ammonia-oxidizing and nitrite-oxidizing bacteria) in surface and bottom water of freshwater ponds were examined with respect to temperature, DO, pH as well as concentration of ammonia and nitrite. The most probable number (MPN) of ammonia-oxidizers in different ponds varied from 1297 +/- 3.6 to 1673.23 +/- 0.36 ml(-1) in bottom and 720.5 +/- 8.1 to 955.3 +/- 10.8 ml(-1) in surface water during the rainy season while the MPN ranged from 1074 +/- 1.07 to 1372.17 +/- 4.6 ml(-1) in bottom and 515 +/- 10.1 to 678 +/- 11.8 ml(-1) in surface water in winter. However, the MPN were greatly reduced in summer and ranged from 435.05 +/- 15.7 to 547.54 +/- 2.12 ml(-1) in bottom and 218.7 +/- 7.3 to 368.4 +/- 9.32 ml(-1) in surface water. Similar seasonal trends were also observed in MPN of nitrite-oxidizers. Among all the physico-chemical parameters, abundance of nitrifiers was more positively correlated with ammonia and nitrite concentration in all the seasons. The abundance of nitrifiers in surface and bottom water was highest in rainy season followed by winter and modest in summer. The potential nitrification activities and oxidation rates were shown to be linear and activity of ammonia-oxidizing and nitrite-oxidizing bacteria was highest during rainy season. 相似文献
80.
Acute static bioassays were conducted for 96 h period with λ-cyhalothrin to determine its acute toxicity to a freshwater catfish,
Clarias batrachus. The 96 h LC50 value was estimated to be 5.00 μg l−1 (95% confidence limit: 4.114–5.712). The alterations in behavioral pattern, such as change in the color of skin, hyperactivity,
loss of balance, rapid swimming, increased surfacing activity, enhanced rate of opercular activity, as well as prominent rates
of convulsions in treated fish were observed with the increasing concentrations of insecticide as compared to the control
fish. The results indicate that λ-cyhalothrin is highly effective even at very low concentrations. 相似文献