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PubMed Journals Articles About "Arion Water" RSS

20:37 EST 18th November 2018 | BioPortfolio

Arion Water PubMed articles on BioPortfolio. Our PubMed references draw on over 21 million records from the medical literature. Here you can see the latest Arion Water articles that have been published worldwide.

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Showing "Arion Water" PubMed Articles 1–25 of 8,300+

Quality Control: Water Activity Considerations for Beyond-use Dates.

There are minimum levels of water activity that are required for growth of bacteria and molds. Water activity is the ratio of vapor pressure of water in a product to pure water at the same temperature. Pure distilled water has a water activity of 1. Water activity is also a measure of water in a material that is available to react with or attach itself to other material; it is also called "free" water while the unavailable water is called "bound" water. Higher water activity substances tend to support more ...


Water use for shale gas extraction in the Sichuan Basin, China.

This study investigates the use of water for extracting shale gas in the Sichuan Basin of China. Both net water use and water intensity (i.e., water use per unit of gas produced) of shale wells are estimated by applying a process-based life cycle inventory (LCI) model. The results show that the net water use and water intensity are around 24500 m/well and 1.9 m water/10 m gas respectively, and that the fracturing and completion stage of shale gas extraction accounts for the largest share in net water ...

Reusable endoscopic water bottles - is daily renewal really necessary?

Most guidelines recommend replacing endoscopic water bottles at least daily with newly sterilized or high-level disinfected water bottles. All these recommendations, however, are mainly based on expert opinions and outbreak reports. We tested the water quality from water bottles used in a gastrointestinal endoscopy unit where water bottles were used up to five days. The results show that the reuse of water bottles for more than one day is inadequate. The expert opinion of changing water bottles daily rather...


Foliar water uptake: processes, pathways, and integration into plant water budgets.

Nearly all plant families, represented across most major biomes, absorb water directly through their leaves. This phenomenon is commonly referred to as foliar water uptake. Recent studies have suggested that foliar water uptake provides a significant water subsidy that can influence both plant water and carbon balance across multiple spatial and temporal scales. Despite this, our mechanistic understanding of when, where, how, and to what end water is absorbed through leaf surfaces remains limited. We first ...

Effects of Submerged Macrophytes on Different Phosphorus Fractions in Overlying Water and Interstitial Water.

The effects of L. with developed root systems and rootless on the concentration and proportion of different phosphorus fractions in the overlying water and the interstitial water were investigated by batch simulation experiments. The effects of different types of submerged macrophytes on the phosphorus fraction in the overlying water and interstitial water were explored. The results indicated a significant influence on the concentration of dissolved phosphorus in the overlying water and interstitial water...

Synthesizing water quality indicators from standardized geospatial information to remedy water security challenges: A review.

Water is vital not only for food, energy and sanitation but also for ecosystem functioning, human health, socio-economic progress and poverty reduction. Water security exists when all people have physical and economical access to sufficient, safe, and clean water that meets basic needs. However, water security is threatened by growing human population, episodic environmental disasters, indiscriminate land management practices, contaminants, and escalation in geopolitical conflicts.

Low numbers of microplastics detected in drinking water from ground water sources.

Microplastic particles have been detected in various natural habitats and the digestive tracts of several species. These particles have also been reported in commercially available seafood, salt or bottled water starting discussions on potential implications for human health. To be able to assess the related risks, exposure concentrations and pathways need to be known. Here, we analysed ground water and drinking water for the presence of microplastics (>20 μm) using FTIR imaging. Samples were taken at di...

Drinking water in West Virginia (USA): tap water or bottled water - what is the right choice for college students?

West Virginia has had a history of water quality issues. In parallel, the world is facing a plastic pollution crisis. In order to better understand behavioral responses to perceived water quality, a survey was conducted at a major research university to ask participants about water quality perceptions and drinking water behaviors. A total of 4,188 students completed the survey during the Spring 2017 semester. Logistic regression analyses were used to predict behaviors. Results indicated that a third of the ...

From aquaporin to ecosystem: Plants in the water cycle.

Vascular plants are major intermediaries in the global water cycle, and are highly adapted to both facilitate and resist water fluxes, such as during root uptake, translocation in the xylem, and transpiration by leaves. Here, we summarize the contributions to a Special Issue on water in the Journal of Plant Physiology, which cluster around the theme of control and facilitation of water movement in plants. We conclude with an editorial view of the need for plant physiologists to consider larger cultural issu...

Antioxidant activity of hydrogen nanobubbles in water with different reactive oxygen species both in vivo and in vitro.

Hydrogen water as a new therapeutic antioxidant has been widely used in living organisms under stress. In this study, we applied nanobubble (NB) technology to hydrogen water. The antioxidant capacity of hydrogen NB water was studied with respect to different reactive oxygen species (ROS) both in vitro and in vivo. Using a relatively weak reduced dye, APF, we showed that hydrogen NB water can effectively remove three cytotoxic ROS, ·OH, ClO- and ONOO-, from water. Hydrogen NB water could also remove O2·-, ...

Drivers of microbiological quality of household drinking water - a case study in rural Ethiopia.

This study aims at assessing the determinants of microbiological contamination of household drinking water under multiple-use water systems in rural areas of Ethiopia. For this analysis, a random sample of 454 households was surveyed between February and March 2014, and water samples from community sources and household storage containers were collected and tested for fecal contamination. The number of Escherichia coli (E. coli) colony-forming units per 100 mL water was used as an indicator of fecal contami...

Driven water/ion transport through narrow nanopores: a molecular dynamics perspective.

Atomistic Molecular Dynamics (MD) simulations provide numerous insights into the process whereby water is driven through a narrow nanopore (diameter on the order of a few water molecules) by application of hydrostatic pressure. If there are ions in the water, e.g., from dissolved salt, these may be swept along with the flowing water. If the surface of the nanopore is charged, electrostatic interaction between the surface charges and the ions as well as with partial charges on the water molecules will influe...

STABLE OXYGEN ISOTOPES IN WATER OF CONCENTATED LIQUID FOODSTUFFS: ARE THE COMMONLY DETERMINED VALUES ACCURATE?

Oxygen isotope analysis of water molecules of liquid foodstuffs is commonly performed under isotopic equilibrium between water in the solution and the vapour water, assuming that the liquid water activity is equal to unity and that liquid water is an ideal mixture of H O isotopologues. A priori this behaviour is not realistic for all foodstuffs, which frequently are very concentrated solutions. In this paper we mainly consider "balsamic vinegar" with the aim of defining an appropriate procedure of oxygen is...

The Fate of Water at the Electrochemical Interfaces: Electrochemical Behavior of Free Water vs. Coordinating Water.

The water reduction which produces hydrogen is one key reaction for electrochemical energy storage. While it has been widely studied in traditional aqueous electrolytes for water splitting (electrolyzers), it also plays an important role for batteries. Indeed, the reduction of water at relatively high potential prevents the practical realization of high-voltage aqueous batteries, while water contamination is detrimental for organic batteries electrolytes. Nevertheless, recent studies pointed towards the pos...

Is the default of 2 liters for daily per-capita water consumption appropriate? A nationwide survey reveals water intake in Japan.

Two liters per day is generally applied as the default drinking water intake rate for risk assessments, although evidence supporting this value is insufficient. This study aimed to reveal actual water intakes from tap water and other types of drinks, and to explore the relationships between these intakes. For this purpose, we conducted a nationwide Internet questionnaire survey. Tap water intake negatively correlated with bottled water and soft drink intakes, suggesting a mutually complementary relationship...

Distribution of tightly and loosely bound water in biological macromolecules and age-related diseases.

This mini-review article is focused on publications devoted to the changes in water binding energy and content of bound water in biological tissues during aging processes, when bound water lost from the hydration layer becomes free water. Bound water is released during cataractogenesis. In skin, water bound to proteins and other biomacromolecules becomes more mobile with increasing skin age. Extracellular to intracellular water ratio increases with age and was associated with muscle cell atrophy. Bound wate...

Access to drinking water: time matters.

Despite the reported achievement of the Millennium Development Goals (MDGs) with respect to drinking water, lack of access to water remains widespread worldwide. The indicator used there to measure access to water in the MDGs refers to the use of an improved water source. However, the amount of time spent in collecting water is high in countries where access to drinking water supplies located on premises is not common. 26.3% of the world's population did not have such access in 2015. Thus the need to travel...

Equipment factors affecting identification of water level with echo for the blind.

Blind people adopt their remaining intact senses to perceive the world for tasks such as determining the water level in a bowl. Pouring water into a bowl generates water sounds and echoes reflected in the bowl. This research develops a bowl with increased echo (called an echo bowl), and analyzes the accuracy of water levels perceived by visually impaired people using a container or a kettle to pour water into a common bowl or an echo bowl. The analysis of factors of pouring and filled equipment indicates th...

The potential of the tree water potential.

Non-invasive quantification of tree water potential is one of the grand challenges for assessing the fate of trees and forests in the coming decades. Tree water potential is a robust and direct indicator of tree water status and is preferably used to track how trees, forests and vegetation in general respond to changes in climate and drought. In this issue of Tree Physiology, Dietrich et al. (2018) predict the daily canopy water potential of mature temperate trees from tree water deficit derived from stem d...

Feasible analysis of reusing flowback produced water in the operational performances of oil reservoirs.

Water reuse is considered one of the most efficient and optimum ways in petroleum industries to address the water scarcity problem. The effluents which are made by the petroleum operations are supposed to be one of the hazardous materials when they are discharged to the environment. The objective of this study is to measure the volume of the required water for the operational performances of the studied oil field. To do this, the necessary water and the volume of provided treated water for the waterflooding...

Growth and biochemical variables in Amazon catfish (Pseudoplatystoma reticulatum♀ x Leiarius marmoratus♂) under different water pH.

Although fish may live in different aquatic environments, variations in the water quality parameters, mainly pH, may have a substantial impact in their development and welfare. The objective of this study was to test the effect of different pH levels on the growth performance and biochemical variables in Amazon catfish juveniles (Pseudoplatystoma reticulatum x Leiarius marmoratus). Fish were subjected to four different water pH levels (4.56, 6.0, 7.24, and 8.90) for 40 days. The total ammonia and alkalinity...

Structure and Dynamics of Water Confined in Imogolite Nanotubes.

We have studied the properties of water adsorbed inside nanotubes of hydrophilic imogolite, an aluminium silicate clay mineral, by means of molecular simulations. We used a classical force field to describe the water and the flexible imogolite nanotube, and validated it against data obtained from first-principles molecular dynamics. With it, we observe a strong structuration of the water confined in the nanotube, with specific adsorption sites and a distribution of hydrogen bond patterns. The combination of...

Spin-Isomer Conversion of Water at Room Temperature and Quantum-Rotor-Induced Nuclear Polarization in the Water-Endofullerene H_{2}O@C_{60}.

Water exists in two forms, para and ortho, that have nuclear spin states with different symmetries. Here we report the conversion of fullerene-encapsulated para water to ortho water. The enrichment of para water at low temperatures is monitored via changes in the electrical polarizability of the material. Upon rapid dissolution of the material in toluene the excess para water converts to ortho water. In H_{2}^{16}O@C_{60} the conversion leads to a slow increase in the NMR signal. In H_{2}^{17}O@C_{60} the c...

Recycle of oil waste via hydrophobic sponge prepared from toner waste.

In this paper a hydrophobic sponge was prepared by solvent free coating of thermosetting toner from a laser printer via simple heating. The sponge was used for oil-water mixture and emulsion separation. The sponge had good separation performance for the oil-water mixture. In dynamic oil recovery study, the sponge had a flux up to thousands L/(m·h) for kerosene and n-hexane. For the water-in-petroleum emulsion with 60% water content, the final water content could be brought down to 1.7-5.0% after 2 cycles o...

Water Vapor Exposure Chamber for Constant Humidity and Hydrogen and Oxygen Stable Isotope Composition.

Water vapor exposure experiments have applications for studying water physisorption and chemisorption hydration and hydroxylation reactions on a wide variety of material surfaces. The stable isotopes of hydrogen and oxygen in the water molecule are a useful tracer of water exchange mechanisms and/or rates in such vapor exposure experiments.


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