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Full-Text Articles in Life Sciences

Leaching Mechanism Of Semiconducting Minerals, Fathi Habashi Dec 2010

Leaching Mechanism Of Semiconducting Minerals, Fathi Habashi

Fathi Habashi

The mechanism of leaching of semiconducting minerals such as PbS, ZnS, UO2, etc., has been the subject of intensive speculation by hydrometallurgists in the early 1950s. The electrochemical mechanism proposed in 1970 by the author in volume 2 of his Principles of Extractive Metallurgy avoids the assumption of forming intermediate complexes that cannot be isolated or identified.


Spring-Fed Stream Benthic Macroinvertebrate Communities As Early Biological Indicators Of Groundwater Tipping Points., Rosemary A. Burk, Jan Kallberg, James H. Kennedy Aug 2010

Spring-Fed Stream Benthic Macroinvertebrate Communities As Early Biological Indicators Of Groundwater Tipping Points., Rosemary A. Burk, Jan Kallberg, James H. Kennedy

Rosemary A. Burk

In 2007, a 20-county area encompassing the Dallas-Fort Worth Metroplex was designated by the State as a Priority Groundwater Management Area (PGMA) in need of implementing strategies for groundwater conservation. The newly created PGMA’s population is expected to increase from 5.5 million in 2000 to 9.5 million by 2030 with projected water needs rising from 1,677 million m3 in 2000 to 3,034 million m3 by 2030 according to a study by Texas Commission on Environmental Quality (TCEQ). The Trinity Aquifer supplied 73% of the area’s groundwater in 2000, with the aquifer outcrop zone being highly susceptible to anthropogenic sources of …


Participatory Rural Appraisal, Ganesh Chandra Apr 2010

Participatory Rural Appraisal, Ganesh Chandra

Ganesh Chandra

Participation, empowerment and inclusion have become the new development buzzword. There has been a range of interpretations of the meaning of participation in development. Participatory development starts from the premise that it is important to identify and build upon strengths already present in communities. Perhaps the most widespread appearance of participation in mainstream development has been seen in the form of participatory methodologies of research, intended to gather a wide range of information from local people at their livelihoods, needs, and strengths, at the same time as 'empowering' them through a process of collaborative analysis and learning. PRA is a …


Dissemination Of Communication And Information In Inland Fisheries, Ganesh Chandra Apr 2010

Dissemination Of Communication And Information In Inland Fisheries, Ganesh Chandra

Ganesh Chandra

Flow of communication and information from the research station to the end user is sine qua non for the sustainable production as well as productivity enhancement in inland fisheries and the development of fishers as a whole. The resource poor who are often more in need than others of information on sustainable and low external input technologies is least likely to gain access to the information required. This has been seen particularly in the fisheries sector where the channels of information accessible to the resource poor delivered information on new practices and recommendations as well as the new culture technologies, …


Metals: Typical And Less Typical, Transition And Inner Transition, Fathi Habashi Mar 2010

Metals: Typical And Less Typical, Transition And Inner Transition, Fathi Habashi

Fathi Habashi

While most chemists agree on what is a metal and what is a non-metal there is a disagreement with respect to what is a metalloid and what is a transition metal. It is believed that this problem can be solved if two new terms are adopted: typical and less typical metals. These new terms will also help reconcile the European Periodic Table versus the North American regarding numbering of groups as well as the IUPAC numbering which could be as well abandoned in favour of group names as will be shown in the manuscript.


Phosphate Industry And The Radon Problem, Fathi Habashi Feb 2010

Phosphate Industry And The Radon Problem, Fathi Habashi

Fathi Habashi

The problem of radon generated during the treatment of phosphate rock by sulfuric acid to produce fertilizers can be solved by using nitric acid. In this case radium, which is the source of radon, goes into solution and can be precipitated by a controlled method and safely disposed of. A variety of options are discussed. Text in Farsi with English translation.


Evaluation Of Frontline Demonstration Of Greengram (Vigna Radiata L.) In Sundarbans, West Bengal, Ganesh Chandra Jan 2010

Evaluation Of Frontline Demonstration Of Greengram (Vigna Radiata L.) In Sundarbans, West Bengal, Ganesh Chandra

Ganesh Chandra

Green gram (mungbean) is one of the important pulse crop in India, which plays a major role in augmenting the income of small and marginal farmers of Sundarban. The prevalent farming situation in Sundarban areas being characterised by kharif season with paddy cultivation in rain-fed condition and water requirement for growing rabi and summer crops are met only through residual soil moisture and/or stored rain-water. The low production of traditional varieties of greengram was a cause of concern for the farmers at large. To overcome this problem of low yield, Krishi Vigyan Kendra of CIFRI has conducted frontline demonstration field …


Aqua Science Through The Ages. An Illustrated History Of Water, Fathi Habashi Jan 2010

Aqua Science Through The Ages. An Illustrated History Of Water, Fathi Habashi

Fathi Habashi

Water a component of the Four Elements considered by the ancient philosophers as essential for survival, played, and is still playing an essential role in society. Great civilizations in ancient times developed along great rivers. The ancient peoples knew how to manage water supplies by digging canals, controlling floods, and using water for irrigation. They designed equipment that used water to measure the time, to determine the density of solids, to fight fires, and to create vacuum. Modern engineers exploited water flow to design and construct huge hydroelectric power stations. Waterways and navigation systems were also an essential element for …