V. Fernández-Cegrí Articles | Environmental XPRT

V Series

LED Rental LED Display VI2.6 | VI2.9 | VI3.9 | VI4.8 | VI5.9 VO3.9 | VO4.8 | VO5.9 Front Maintenance Curved Installation Edge-care Design No Light Leakage Light and Thin Parameter V Series Outdoor VO 3.9 VO 4.8 VO 5.9 Pixel Pitch(mm) 3.91mm 4.81mm 5.95mm Pixel Matrix Per Sq.m 65536 43264 28224 Pixel Configuration SMD1921 SMD2727 / 1921 SMD2727 Brightness (nights) ≥3500 ≥4000 ≥4000 Scan ...

Sep. 17, 2019

By Shenzhe Ledful Electronics Co.,Ltd.

Tips to Build a Healthy Rumen Environment

The health of your herd starts with good rumen management. Healthy cows perform better. Better performance can lead to greater production, and ultimately greater profitability. Without a well-functioning rumen, your herd could be more susceptible to a variety of health complications and costly expenses. Two things are vital when it comes to optimal rumen health: a stable, active, and healthy ...

Dec. 18, 2020

By Diamond V

Title V Compliance

Title V of the Clean Air Act Amendments assimilates all the contents of a facility's state operating permit into one binding document, in an effort to simplify permit compliance certification. However, submittal of annual compliance certification is a labor-intensive process that places significant pressure on EH&S personnel responsible for ensuring that a facility meets all the conditions in its ...

Aug. 10, 2005

By BREEZE Software, Data and Services / Trinity Consultants

Relationship of aquatic environmental factors with the abundance of <italic>Vibrio cholerae, Vibrio parahaemolyticus, Vibrio mimicus</italic> and <italic>Vibrio vulnificus</italic> in the coastal area of Guaymas, Sonora, Mexico

Relationship of aquatic environmental factors with the abundance of Vibrio cholerae, Vibrio parahaemolyticus, Vibrio mimicus and Vibrio vulnificus in the coastal area of Guaymas, Sonora, Mexico

Members of the genus Vibrio are common in aquatic environments. Among them are V. cholerae, V. vulnificus, V. parahaemolyticus and V. mimicus. Several studies have shown that environmental factors, such as temperature, salinity, and dissolved oxygen, are involved in their epidemiology. Therefore, the main objective of this study is to determine if there is a correlation between the ...

Dec. 11, 2013

By IWA Publishing

Determination of total vanadium and vanadium(V) in groundwater from Mt. Etna and estimate of daily intake of vanadium(V) through drinking water

Vanadium(V) can be found in natural waters in the form of V(IV) and V(V) species, which have different biological properties and toxicity. The purpose of this study was to determine the concentrations of total V and V(V) in groundwater from the area of Mt. Etna and to assess the estimated daily intake (EDI) of V(V) of adults and children through drinking water. Water was sampled monthly at 21 ...

Jun. 8, 2015

By IWA Publishing

Reverse Osmosis Chemicals

Reverse osmosis is an efficient way of purifying water but operational efficiency can only be obtained if the plant and in particular the membranes are not kept clean. If this is not the case, membranes quickly become fouled result in lower output and ultimately resulting in the costly necessity of having to replace them. Various products are available which have been developed to combat the ...

Jul. 25, 2019

By B & V Chemicals

Closed circuit Water Treatment Chemicals

The problems encountered in closed circuit systems are like those in open systems – corrosion, suspended solids, scale, and microbiological contamination. However, there are differences between the systems which require us to treat them in different ways. The fixed volume, low make-up of a closed system allows us to dose water treatment products at much higher levels than is possible in ...

Jul. 25, 2019

By B & V Chemicals

Selecting EH&S Software for the Long Term

A note from A V Systems: There are currently thousands of software programs on today’s market that can handle some or all aspects of Environmental, Health and Safety issues. Choosing which one is best suited for your particular needs can be both difficult and time consuming. A V Systems would like to help you through that process by giving you some important tips on what to consider when ...

Jul. 5, 2007

By A V Systems, Inc.

Cooling Towers and Cooling Systems

Water is used widely as a cooling medium in processes for many industries and public buildings. The use of an evaporative cooling tower is still the most effective method of heat transfer. Heat is transferred from hot process fluids into the cooling water through a heat exchange surface; consequently, the cooling water heats up. The evaporation of a small percentage of this cooling water in a ...

Jul. 25, 2019

By B & V Chemicals

Keeping you at the forefront of innovation

The water treatment industry predominately uses a number of traditional chemical formulations for the treatment of steam boilers, cooling towers, closed circuits and disinfection of water systems. At B & V Chemicals we realise that innovation is the key to success in any industry, including water treatment. B & V Chemicals has always had a commitment to Research and Development, with new ...

Jul. 29, 2019

By B & V Chemicals

The effect of co-existing solutes on arsenate removal with hydrotalcite compound

Hydrotalcite (HTAL-Cl), an inorganic anion exchanger, is of use as an adsorbent for the removal of arsenate (As(V)) in water systems. The adsorption properties of HTAL-Cl for As(V) and the effects of co-existing anions on the As(V) removal performance were investigated in this work. Under the conditions of pH≥4, the adsorption capacity for As(V) gradually decreased with an increase of pH, but ...

Mar. 1, 2010

By IWA Publishing

Environment v economic downturn

Trucost research for the TEEB for Business Coalition Natural Capital at Risk finds that the environmental costs of business are costing the global economy $7.3 trillion a year (equivalent to the GDP of China) from the loss of natural resources and ecosystem services, greenhouse gas emissions, and air pollution-related health costs. The ability of companies to continue to externalize all of these ...

Jul. 4, 2013

By Trucost Plc

Sulphur removal from used automotive lubricating oil by ionising radiation

In this work, gamma radiation was used to remove sulphur from used automotive lubricating oil. The sample was fractioned and irradiated with 10, 20, 50, 100, 200 and 500 kGy doses in a 60Co irradiator (Gammacell-220 – 12 kCi). Fifty percent and 70% (v/v) of MilliQ water and 30% (v/v) of hydrogen peroxide were used to improve the radiolysis. The sulphur content, before and after the irradiation, ...

Jan. 19, 2010

By Inderscience Publishers

Quantifying the effect of nanoparticles on As(V) ecotoxicity exemplified by nano‐Fe2O3 (magnetic) and nano‐Al2O3

Nano‐Fe2O3 (magnetic) and nano‐Al2O3 are increasingly used in biomedical fields for cellular labeling and drug delivery and in the industry as catalysts. However, they may also serve as carriers of toxic contaminants and negatively impact the environment and human health. In the present study, Ceriodaphnia dubia was used to assess the toxicity of these nanoparticles (NPs) with and without the ...

Sep. 20, 2012

By John Wiley & Sons, Ltd.

Detection of <italic>Vibrio cholerae</italic> and <italic>Vibrio parahaemolyticus</italic> by molecular and culture based methods from source water to household container-stored water at the point-of-use in South African rural communities

Detection of Vibrio cholerae and Vibrio parahaemolyticus by molecular and culture based methods from source water to household container-stored water at the point-of-use in South African rural communities

Detection methods for Vibrio cholerae and Vibrio parahaemolyticus which included the culture based approach with polymerase chain reaction (PCR) confirmation, PCR detection without enrichment and PCR with a pre-enrichment were developed and their performance evaluated. PCR assays targeted the SodB (V. cholerae species), Flae (V. parahaemolyticus species), 16S rRNA (Vibrio and Enterobacteriacea ...

Jun. 1, 2010

By IWA Publishing

What Is A V-Cone Meter? And Why Should I Care?

There is a better alternative for differential pressure (DP) metering accuracy in problematic applications where other meter designs might compromise performance. A V-Cone meter’s simple mechanical design overcomes confined spacing, pipeline turbulence, and even noisy electrical environments that can hamper other meters. Best of all, it delivers + 0.5 percent accuracy and provides an easy ...

Dec. 24, 2020

By McCrometer, Inc. - a subsidiary of Danaher Corporation

Dual-function growth medium and structural soil for use as porous pavement

Permeable grass-covered surfaces can reduce the quantity of storm water runoff and filter out potentially harmful chemicals. The objective of this study was to develop permeable structural soils that sustained healthy turf growth and filtered heavy metals from contaminated pavement runoff. The basic soil medium was a 50:50 mixture (v/v) of expanded shale (ExSh) and quartz sand (QS). The ExSh ...

Oct. 23, 2008

By Soil Science Society of America (SSSA)

Hydraulics stability of compost-based filtration media

The longevity of compost-based storm water filtration systems has not been widely studied. Hydraulic conductivity measurements of compost amended sand media (20% and 50% v/v) within columns were undertaken. The results show that the filtration media in both columns had a reduction in the total saturated hydraulic conductivity. A tracer test showed there was no blockage due to biological or ...

Dec. 1, 2008

By Inderscience Publishers

Ferrates (iron(VI) and iron(V)): Environmentally friendly oxidants and disinfectants

ABSTRACTIron(VI) and iron(V), known as ferrates, are powerful oxidants and their reactions with pollutants are typically fast with the formation of non-toxic by-products. Oxidations performed by Fe(VI) and Fe(V) show pH dependence; faster rates are observed at lower pH. Fe(VI) shows excellent disinfectant properties and can inactivate a wide variety of microorganisms at low Fe(VI) doses. Fe(VI) ...

Mar. 1, 2005

By IWA Publishing

Vanadium bioavailability and toxicity to soil microorganisms and plants

Vanadium, V, is a redox‐sensitive metal that in solution, under aerobic conditions, prevails as the oxyanion vanadate(V). There is little known regarding vanadium toxicity to soil biota and the present study was set up to determine the toxicity of added vanadate to soil organisms and to investigate the relationship between toxicity and vanadium sorption in soils. Five soils with contrasting ...

Jul. 8, 2013

By John Wiley & Sons, Ltd.