排序方式: 共有2条查询结果,搜索用时 15 毫秒
1
1.
Narayanan Siju Ellickal Rehuman Nisha Abdul Harilal Seetha Vincent Anju Rajamma Rajalakshmi Ganesan Behl Tapan Uddin Md. Sahab Ashraf Ghulam Md Mathew Bijo 《Environmental science and pollution research international》2020,27(35):43542-43552
Environmental Science and Pollution Research - Zinc (Zn) is an essential trace element for most organisms, including human beings. It plays a crucial role in several physiological processes such as... 相似文献
2.
Ammini Parvathi Seetha Radhakrishnan M. P. Sajila Breezy Jacob 《Environmental monitoring and assessment》2011,177(1-4):227-231
Accurate measurement of bacterial and viral abundance in coastal marine environments is important to understand the dynamics of microbial communities in these ecosystems. In this study, the effect of formaldehyde preservation on the abundance of bacteria and viruses in water samples from Cochin Backwater was determined by SYBR Green I staining and epifluorescence microscopy. The counts were determined for 45 days in samples fixed with 1?C6% formaldehyde. The results suggest rapid decline in counts of bacteria and viruses in samples preserved in formaldehyde, and the decline increased with increase in the final concentration of formaldehyde in the sample. The initial bacterial and viral counts in the sampling site were 5.2 × 106/ml and 3.9 × 107/ml, respectively. The bacterial count dropped by 5.1%, 53.3%, 55.7%, and 85% after 1, 7, 15, and 45 days, respectively, in sample fixed with 1% formaldehyde. The decline in viral counts was higher, being 32.4%, 47.9%, 68.1%, and 93% after 1, 7, 15, and 45 days, respectively. Storage of fixed samples at ??20°C did not halt the decline in microbial counts, suggesting that, irrespective of storage temperature, formaldehyde-fixed samples lead to underestimation of microbial counts. 相似文献
1