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Isolation and characterization of ingenol esters from Euphorbia cornigera

Chinese Chemical Letters 2011年第4期22卷 451-454页

作者： imam bakhsh baloch Musa Kaleem baloch Department of Chemistry Gomal UniversityDera Ismail KhanPakistan

Methanolic extract of Euphorbia cornigera *** HPLC separation yielded three new *** structures and relative stereochemistry were established through 2D-NMR spectroscopic measurements.

关键词： Euphorbiaceae Euphorbia cornigera 2D NMR of 13-acyloxyingenol

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Environmental Assessment and Analysis of Chemical Properties of Drinking Water Using Geo-Spatial Technologies: Examples from Lahore Metropolitan

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Advances in Remote Sensing 2018年第3期7卷 259-275页

作者： Ali imam Mirza Ali Iqtadar Mirza Tabasam Jamal Syed Shehzad Hassan Muhammad A. Butt Atif Ali Hafsa Batool Rashid Mahmood Attia Naz Azam Sohail Imran Saddique Kaukab Sana Alvi Javed Ahmad Safeer Ali Muneeb Aamir Azeem Akhtar Arshad Javed Department of Geography GC University Lahore Pakistan Remote Sensing Group Department of Space Science University of the Punjab Lahore Pakistan

The contamination of drinking water in Pakistan is a serious threat to its citizens. Urbanization leads to an increased demand of drinking water supply that leads to excessive drawdown that further causes lowering of water table. The current WASA (Water and Sanitation Authority) supply network does not fulfill the demand of a growing metropolitan city of Lahore. The drawdown of Lahore is absolutely reliant on Water and Sanitation Authority (WASA) water supply network that causes numerous problems due to inappropriate management of groundwater capital and increased urbanization. This research investigates groundwater qualities: Alkalinity, Arsenic, Calcium, chloride, Total Hardness, Magnesium, Nitrate, pH and Total Dissolved solids using geographic information system (GIS). Residents of high concentrated towns, like Samnabad Town, Allama Iqbal Town, Gulberg, Data Ganj bakhsh Town, Ravi Town and Wahga town witness cut-down of water supply mainly due to over burden on tube wells. Chemical properties of drinking water show that most of the parameters were within the allowable limits of WHO whereas the pH, and arsenic values are higher than the average. Arsenic is a carcinogenic element which causes cancer and is higher in the drinking water. Finally, this study identifies highly contaminated groundwater zones and makes it convenient to find actual pollutants. Therefore, plans are needed to protect the aquifer.

关键词： Water Contamination Urbanization Geographic Information System (GIS) Chemical Properties Carcinogenic Elements WHO WebGIS RS WASA DNA pH TDS

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