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Effect of sodium arsenite on adrenocortical activity in immature female rats: evidence of dose dependent response 总被引:1,自引:0,他引:1
ntroductionArsenic,ametalloid,isanonessentialtraceelement,hasbeenclaimedtobeofclinicalbenefitinthetreatmentofsyphilis,amoebiasisandothertropicaldiseases(Klaassen,1990;Kowaguchi,1981).Besideitsclinicalimportance,arsenicisreportedtobeanimportantwaterpo… 相似文献
5.
Ghoramara Island is located ca. 150 km south of Kolkata, Bay of Bengal, India, in the Sundarban Delta complex. This sparsely
populated island is suffering from severe coastal erosion and areal reduction for the last three decades, which results in
the loss of major areas on the northwest coast. Both numerous households and a significant area of agricultural land and coastal
stretches for fish drying have been lost. This has rendered thousands of people homeless as ‘environmental refugess’. In the
present paper an attempt is made to study the erosion and accretion process through time series analysis using a GIS technique.
Also, a study of remedial measures to protect the island using a ‘bio-engineering’ technique is reported in this paper. It
has been shown that, in the absence of protection measures, the eastern shore will merge with the Indian mainland during the
next 25 years, while the western part will be completely washed off. 相似文献
6.
Chowdhury AG Das C Kole RK Banerjee H Bhattacharyya A 《Environmental monitoring and assessment》2007,131(1-3):467-473
A detailed study has been presented on heavy metal content of the Iture Estuary. Waters of the Sorowie and Kakum rivers that
supply water into the Estuary were investigated to ascertain heavy metal pollution levels due to anthropogenic activities.
Concentration s of Cd, Zn, Se and Pb were measured. The study shows pre-occupying pollution levels that constitute a threat
to both terrestrial and aquatic ecosystems. The abundance of metals in the Estuary is in the order Zn > Pb > Cd > Se. The
level of Cd in the Iture Estuary ranged between 0.011 mg/l and 0.041 mg/l while Se was in the range 0.018 mg/l to 0.029 mg/l,
Pb 0.020 mg/l to 0.075 mg/l and Zn 0.040 to 2.45 mg/l. The impact of contaminated water from the Sorowie River on the Iture
Estuary was outstanding and the study points out the importance of the Sorowie River as a primary pollution source to the
Iture Estuary. The pollution of the Iture Estuary was found to be connected to human activities in its catchments. 相似文献
7.
S. V. Otari R. M. Patil N. H. Nadaf S. J. Ghosh S. H. Pawar 《Environmental science and pollution research international》2014,21(2):1503-1513
A novel approach for the green synthesis of silver nanoparticles (AgNPs) from aqueous solution of AgNO3 using culture supernatant of phenol degraded broth is reported in this work. The synthesis was observed within 10 h, and AgNPs showed characteristic surface plasmon resonance around 410 nm. Spherical nanoparticles of size less than 30 nm were observed in transmission electron microscopy. X-ray diffraction pattern corresponding to 111, 200, 220, and 311 revealed the crystalline nature of the as-formed nanoparticles. It was found that the colloidal solution of AgNP suspensions exhibited excellent stability over a wide range of ionic strength, pH, and temperature. The effect of pH and ionic strength indicated that stabilization is due to electrostatic repulsion arising from the negative charge of the conjugate proteins. The AgNPs showed highly potent antimicrobial activity against Gram-positive, Gram-negative, and fungal microorganisms. The as-prepared AgNPs showed excellent catalytic activity in reduction of 4-nitrophenol to 4-aminophenol by NaBH4. By manufacturing magnetic alginate beads, the reusability of the AgNPs for the catalytic reaction has been demonstrated. 相似文献
8.
Ghosh Shreya Gandhi Mayuri van Hullebusch Eric D. Das Alok Prasad 《Environmental science and pollution research international》2021,28(30):40249-40263
Environmental Science and Pollution Research - There has been alarming depletion of manganese (Mn) reserves owing to the ongoing extensive mining operations for catering the massive industrial... 相似文献
9.
Ravikumar KVG Debayan Ghosh Mrudula Pulimi Chandrasekaran Natarajan Amitava Mukherjee 《Frontiers of Environmental Science & Engineering》2020,14(1):16
10.
This study investigated the presence of total mercury (Hg) and organic mercury levels in the muscle of 19 common fresh water
fish species captured from river Ganges, West Bengal, India. The total mercury level found in our study may not cause any
toxic effect, but the methyl mercury (MeHg) level in some freshwater fish species was surprisingly very high and toxically
unacceptable. The results of mercury analysis in various specimens indicated that some fish muscles tended to accumulate high
levels of Hg, and approximately 50–84% of Hg was organic mercury. A strong positive correlation between mercury levels in
muscle with food habit and fish length (age) was found. Wallago attu possessed the highest amount of organic mercury in their muscle tissues, and it was 0.93 ± 0.61 μg Hg/g of wet weight. Whereas
in small-sized fishes Eutropiichthys murius, Puntius sarana, Cirrhinus mrigala, Mystus vittatus or Mystus gulio, and Tilapia mossambicus, it was below the detection limit. Contamination in Catla catla (0.32 ± 0.11), Anguilla bengalensis bengalensis (0.26 ± 0.07 μg Hg/g), Chitala chitala (0.25 ± 0.18), Rita rita (0.34 ± 0.14), and Ompok pabda (0.26 ± 0.04) was also above the 0.25 μg Hg/g of wet weight, the limit set by the PFA for the maximum level for consumption
of fish exposed to MeHg. Though in Labeo rohita (0.12 ± 0.03), Mastacembelus armatus (0.17 ± 0.02), Pangasius pangasius (0.12 ± 0.16), Bagarius bagarius (0.12 ± 0.01), and Clupisoma garua (0.1 ± 0.01), concentration was below the recommended level, in Lates calcarifer (0.23 ± 0.0) and Mystus aor (0.23 ± 0.1), it was threatening. Interestingly, a low concentration of Hg was found in post-monsoon samples. 相似文献