laboratory water Articles
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What is a Laboratory Water Bath?
A laboratory water bath, also known as a serology water bath or thermostatic water bath, is a container filled with heated water that is used to incubate samples at a constant temperature for long periods. A laboratory water bath is most commonly used during incubation in microbiological laboratory work because water can retain heat so well, but can also enable chemical reactions to occur once ...
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Laboratory water supply - Netherlands, 4,0 m3/d - Case Study
Project Description: Lenntech has engineered, manufactured and assembled a water supply system including reverse osmosis make up water station for a research and development branch of a research company. The water is used to research different oils and other fluids for the fluid medium viscosity The water water supply system is equipped with top brand instrumentation and equipment. The system is ...
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Experimental observation on factors affecting intrusion volumes during low or negative pressure events
External water intrusion during low or negative pressure transient events in urban water supply systems may cause pollution and health problems. The volume of intrusion pollutants is one of the significant indicators that can reflect the degree of health risks when a pollution incident occurs. A pilot-scale platform was constructed in this study to simulate intrusion events, which were caused ...
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Munox SR Remediates Oil Seepage on Caribbean Island
Munox SR bioaugmentation remediated petroleum seepage on a Caribbean Island by NRG Save of Toronto. For several years on-going surface seepage from a crude petroleum leak was collected in a pit to prevent further surface flow. Recently, Munox SR was added to the pit and to the ground surface. After 6 days the water in the pit was visibly cleaner. After 12 days laboratory tests of the water in ...
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Water Quality Sensors
Background Water is the source of life, human life and production activities can not do without water. The quality of drinking water is closely related to human health. Water quality monitoring and control has become an important subject of modern science. The on-line water quality monitoring system can accurately, timely and comprehensively reflect the current water quality and development ...
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Application of water pollution detector
Background: The (nitrate) link between agriculture and water quality is nutrient abundance - I've always thought the main issue was with fertilizers. Excessive nutrient loss often leads to eutrophication of surface waters. This condition can lead to harmful algal blooms (HAB), which produce dangerous toxins and cause a drop in dissolved oxygen, killing fish in both marine and freshwater ...
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Heated Laboratory Water Bath Function and Uses
A heated water bath is a piece of lab equipment used to heat samples or reactions to a set temperature. A temperature controlled water bath is useful in any laboratory for heating reactions, thawing samples, maintaining sample temperature or incubation. How To Use A Heated Water Bath Before switching on the water bath, the water reservoir should be filled with distilled water to the indicated ...
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Bacterial biofilms formed in arsenic-containing water: biodeterioration of water network materials
The immersion of any material in a water system triggers a surface microbial colonization which simultaneously influences the corrosion behavior of the substratum. The present study was focused on the As(V) influence on the biofilm formation and their consequences on the corrosion behavior of different substrata. Commercial materials used in water distribution networks: alloys based on Fe, Zn ...
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Effects of the combination of aeration and biofilm technology on transformation of nitrogen in black-odor river
Excess nitrogen in urban river networks leading to eutrophication has become one of the most urgent environmental problems. Combinations of different aeration and biofilm techniques was designed to remove nitrogen from rivers. In laboratory water tank simulation experiments, we assessed the removal efficiency of nitrogen in both the overlying water and sediments by using the combination of ...
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Development of a regression model to predict copper toxicity to Daphnia magna and site‐specific copper criteria across multiple surface‐water drainages in an arid landscape
The water effect ratio (WER) procedure developed by the U.S. Environmental Protection Agency is commonly used to derive site‐specific criteria (SSC) for point‐source metal discharges into perennial waters. However, experience is limited with this method in ephemeral and intermittent systems typical of arid climates. This study presents a regression model to develop WER‐based SSC for a network ...
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Fate of
Salmonella Typhimurium in laboratory-scale drinking water biofilmsInvestigations were carried out to evaluate and quantify colonization of laboratory-scale drinking water biofilms by a chromosomally green fluorescent protein (gfp)-tagged strain of Salmonella Typhimurium. Gfp encodes the green fluorescent protein and thus allows in situ detection of undisturbed cells and is ideally suited for monitoring Salmonella in biofilms. The fate and persistence of ...
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Analysis of Geosmin and 2-Methylisoborneol Utilizing the Stratum PTC and Aquatek 70
Abstract Geosmin and 2-Methylisoborneol are organic compounds that have a distinct scent. These compounds also have an extremely low odor detection threshold and because of this, many drinking water laboratories require detection levels of below 10ppt. This application note investigates the detection of Geosmin and 2-Methylisoborneol at a one part per trillion (ppt) level utilizing Purge and Trap ...
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Assessing the metabolic potential of phototrophic communities in surface water environments: Fludioxonil as a model compound
Differences are often apparent in the observed rates of degradation between laboratory water‐sediment studies and outdoor studies in surface water environments. Indeed, previous work has shown that including phototrophic communities in laboratory systems can result in the enhancement of degradation, when compared against systems that exclude phototrophs, incubated in darkness. In ...
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Application of water pollution detector
Background:The (nitrate) link between agriculture and water quality is nutrient abundance - I've always thought the main issue was with fertilizers. Excessive nutrient loss often leads to eutrophication of surface waters. This condition can lead to harmful algal blooms (HAB), which produce dangerous toxins and cause a drop in dissolved oxygen, killing fish in both marine and freshwater ...
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Transient tests for locating and sizing illegal branches in pipe systems
In pipe systems illegal branches can take away remarkable water resources with negative effects from both the economic and technical points of view. Difficulties in pointing out illegal branches by means of steady-state pressure and discharge measurements are mainly due to the fact that, of course, such systems are not active according to a regular time schedule. In this paper the possibility of ...
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Drinking Water Analysis Guide
Public Water Systems (PWS), regulated by the United States Environmental Protection Agency (USEPA), provide drinking water to 90% of Americans. Water systems and laboratories testing drinking water for Safe Drinking Water Act (SDWA) compliance must be certified and must use USEPA approved methods, which are developed by the USEPA, other government agencies, universities, consensus method ...
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Experimental characterization of PVC-O pipes for transient modeling
The increasing use of plastic materials has modified several aspects of design and management of water distribution systems. With reference to the numerical modeling of transients, the definition of a correct rheological model of the pipe material is receiving an increasing interest. In this paper the behavior of the molecularly oriented polyvinyl chloride (PVC-O) pipes during transients is ...
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Moisture Content and Density of Smectites
The measured density of smectites, using ASTM Test Method for Specific Gravity of Soils (D 854) and ASTM Method for Laboratory Determination of Water (Moisture) Content of Soil, Rock, and Soil-Aggregate Mixtures (D 2216), vary as a function of heating temperature and time. For example, the measured moisture content of air-dry Otay bentonite, heated to 110°C, varied from 16.48% moisture to 19.0% ...
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Testing the waters with Tecta - Sydney Water Laboratory Services
Speeding up the return of microbiological data to improve our response to environmental incidents Why do we test for E. coli? Escherichia coli (E. coli) is one of many kinds of bacteria that live in the gut of humans and animals. They’re easy to find because faeces contains large numbers of E. coli. So to detect faecal pollution, we look for E. coli to warn us that other nasties may be ...
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New markets and applications anticipated for HVAC damper and valve actuators
For over 30 years Schischek has been supplying electric explosion proof products for building services and HVAC applications in many industries, including onshore and offshore oil and gas, refineries, chemical plants, laboratories, pharmaceuticals, water treatment and ship building. The recent acquisition of the company by theRotork group of flow control companies presents new opportunities for ...
By Rotork plc
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