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Sida 1 från 7584 resultat
Multicausal analysis on water deterioration processes present in a drinking water treatment system.
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The fluctuation of water turbidity has been studied during summer in the settling tanks of a drinking water treatment plant. Results from the multiple cause-effect model indicated that five main pathways interactively influenced thequalityof tank water. During rain, turbidity levels increased mainly
Drinking water microbiome assembly induced by water stagnation.
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What happens to tap water when you are away from home? Day-to-day water stagnation in building plumbing can potentially result in water quality deterioration (e.g., lead release or pathogen proliferation), which is a major public health concern. However, little is known about the microbial ecosystem
Water deteriorates lubricating oils: removal of water in lubricating oils using a robust superhydrophobic membrane
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Water is recognized as a contaminant in lubricating oils. Recently, interfacial materials with special wettability have been broadly developed for oil-water separation. However, solving lubricating oil failure caused by water remains a challenge. Here, a robust superhydrophobic membrane is presented
Implications of organic carbon in the deterioration of water quality in reclaimed water distribution systems.
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Changes in water quality in reclaimed water distribution systems are a major concern especially when considering the potential for growth of pathogenic microbes. A survey of 21 wastewater process configurations confirmed the high quality effluent produced using membrane bioreactor (MBR) technology,
Spermine-priming restrained water relations and biochemical deteriorations prompted by water deficit on two soybean cultivars
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The outstanding role of spermine in eliciting defense adaptation of soybean to different levels of water deficit (0, -0.1, -0.5 and -1.1 MPa) was investigated by determining the changes in growth, photosynthetic pigments, osmolytes, water relations, and antioxidants. All the studied traits clearly
Assessment of Drinking Water Quality from Bottled Water Coolers.
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BACKGROUND
Drinking water quality can be deteriorated by microbial and toxic chemicals during transport, storage and handling before using by the consumer. This study was conducted to evaluate the microbial and physicochemical quality of drinking water from bottled water coolers.
METHODS
A total of
[Deterioration in the quality of fresh alluvial water due to mineralized waters in the lower stratum].
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[Nitrate water pollution of drinking water in the Bydgoszcz district].
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The study was undertaken to evaluate the degree of drinking water pollution in the towns and countryside of the Bydgoszcz District, supplied by various installations, on the basis of the results of investigations of sanitary-epidemiological stations. Evaluation was done according to the state in
Water engineering. Reducing sewer corrosion through integrated urban water management.
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Sewer systems are among the most critical infrastructure assets for modern urban societies and provide essential human health protection. Sulfide-induced concrete sewer corrosion costs billions of dollars annually and has been identified as a main cause of global sewer deterioration. We performed a
Vision in water.
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The purpose of this study is to determine visual performance in water, including the influence of pupil size. The water environment was simulated by placing goggles filled with saline in front of the eyes with apertures placed at the front of the goggles. Correction factors were determined for the
Treatment: improvement or deterioration of water quality?
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The formation of trihalomethanes through chlorination has shown very clearly that water treatment processes may adversely affect water quality. There are many more examples of such effects, including the following which are discussed in detail: 1. Formation of organohalogen compounds in addition to
Deterioration of water quality of Surma river.
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Surma River is polluted day by day by human activities, poor structured sewerage and drainage system, discharging industrial and household wastes. The charas (natural channels) are responsible for surface runoff conveyance from its urban catchments to the receiving Surma River. Water samples have
Is water shortage risk decreased at the expense of deteriorating water quality in a large water supply reservoir?
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Reservoir operations affect both the quantity and quality of stored and discharged water. Hedging rules (HRs) are commonly used in water supply reservoir operations to ration water delivery and decrease water shortage risk. However, the increased carryover storage with hedging may aggravate
Asset deterioration and discolouration in water distribution systems.
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Water Distribution Systems function to supply treated water safe for human consumption and complying with increasingly stringent quality regulations. Considered primarily an aesthetic issue, discolouration is the largest cause of customer dissatisfaction associated with distribution system water
Evolution of statistically inhomogeneous degenerate water wave quartets.
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A discretized equation for the evolution of random surface wave fields on deep water is derived from Zakharov's equation, allowing for a general treatment of the stability and long-time behaviour of broad-banded sea states. It is investigated for the simple case of degenerate four-wave interaction,
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