Low-power vacuum pumps are commonly used for Southern and Northern transfer from agarose gels and for slot and dot blotting. Unfortunately, commercially available vacuum pumps are expensive and susceptible to contamination with transfer reagents. The following describes the use and construction of a very simple and cheap apparatus, which generates and measures a partial vacuum as effectively as...

s (200 300 words) covering the themes of the Conference can be submitted on the website www. hpc2017.org from 1st December 2015 onwards until 31st March 2016. The abstracts will be screened and authors will contacted and be advised of acceptance by 30th June 2016. Full papers will be required by 30th November 2016. The 12th IEA Heat Pump Conference starts on Monday starts with a series of Works...

As a result of the research, it was found that blades working impellers pumps are eroded at inlet and outlet. Based on software studies, points erosion caused by cavitation sand particles entrance impeller operation under heavy load have been determined. The operating compared with in nature. After comparison developments, is determined they compatible natural conditions. following model recomm...

energy costs comprise considerable amount of operation costs in water distribution networks. optimal management of energy costs to provide required water for consumers with desired quality is of high importance. to achieve this, optimization is defined as a powerful tool. in this paper, by focusing on operation phase, multi-objective optimization of water supply network considering hydraulic, q...

Diseases associated with viruses also found in environmental samples cause major health problems in developing countries. Little is known about the frequency and pattern of viral contamination of drinking water sources in these resource-poor settings. We established a method to analyze 10 liters of water from drinking water sources in a rural area of Benin for the presence of adenoviruses and r...

One of the key requirements for reliable operation of a water supply system is a thorough analysis and proper selection of the control valves and pumps. For valves, selection criteria includes capacity, pressure loss, controllability, torque, cavitation and transients. Pump selection requires matching the pump performance to varying system demands. Examples are given for single pump operation a...

n engl j med 367;24 nejm.org december 13, 2012 2265 Mississippi . . . .” We’d been told that if the electricity came back on before we hit “ten-Mississippi,” then the backup generators were working fine. A communal sigh was heaved when the count stopped short of double digits. Ventilators and intravenous (IV) pumps hummed on without a hitch. Downstairs, however, water was pouring into the basem...