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Water transport

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https://www.readbyqxmd.com/read/29166091/string-like-collective-motion-and-diffusion-in-the-interfacial-region-of-ice
#1
Xinyi Wang, Xuhang Tong, Hao Zhang, Jack F Douglas
We investigate collective molecular motion and the self-diffusion coefficient Ds of water molecules in the mobile interfacial layer of the secondary prismatic plane (112¯0) of hexagonal ice by molecular dynamics simulation based on the TIP4P/2005 water potential and a metrology of collective motion drawn from the field of glass-forming liquids. The width ξ of the mobile interfacial layer varies from a monolayer to a few nm as the temperature is increased towards the melting temperature Tm, in accordance with recent simulations and many experimental studies, although different experimental methods have differed in their precise estimates of the thickness of this layer...
November 21, 2017: Journal of Chemical Physics
https://www.readbyqxmd.com/read/29165983/incorporating-electrode-modification-layer-with-vertical-phase-separated-photoactive-layer-for-efficient-and-stable-inverted-nonfullerene-polymer-solar-cells
#2
Zhenzhen Shi, Hao Liu, Yaping Wang, Jinyan Li, Yiming Bai, Fuzhi Wang, Xingming Bian, Tasawar Hayat, Ahmed Alsaedi, Zhan'ao Tan
For bulk heterojunction polymer solar cells (PSCs), the donors and acceptors featuring specific phase separation and concentration distribution within the electron donor:acceptor blends crucially affect the exciton dissociation and charge transportation. Herein, efficient and stable nonfullerene inverted PSCs incorporating phase separated photoactive layer and titanium chelate electrode modification layer are demonstrated. Water contact angle (WCA), scanning kelvin probe microscopy (SKPM), and atomic force microscopy (AFM) techniques are implemented to characterize the morphology of photoactive layers...
November 22, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/29165704/involvement-of-def-1-mutation-in-the-response-of-tomato-plants-to-arbuscular-mycorrhizal-symbiosis-under-well-watered-and-drought-conditions
#3
Beatriz Sánchez-Romera, Mónica Calvo-Polanco, Juan Manuel Ruiz-Lozano, Ángel María Zamarreño, Vicent Arbona, Jose María García-Mina, Aurelio Gómez-Cadenas, Ricardo Aroca
Jasmonic acid (JA) and arbuscular mycorrhizal (AM) symbioses are known to protect plants against abiotic and biotic stresses, but are also involved in the regulation of root hydraulic conductance (L). The objective of this experiment was to elucidate the role of JA in the water relations and hormonal regulation of AM plants under drought by using tomato plants defective in the synthesis of JA (def-1). Our results showed that JA is involved in the uptake and transport of water through its effect on both physiological parameters (stomatal conductance and L), and molecular parameters, mainly by controlling the expression and abundance of aquaporins...
November 20, 2017: Plant & Cell Physiology
https://www.readbyqxmd.com/read/29165475/effect-of-the-water-fraction-isolated-from-fructus-ligustri-lucidi-extract-on-bone-metabolism-via-antagonizing-a-calcium-sensing-receptor-in-experimental-type-1-diabetic-rats
#4
Nan-Nan Sha, Yong-Jian Zhao, Dong-Feng Zhao, Daniel Kam-Wah Mok, Qi Shi, Yong-Jun Wang, Yan Zhang
Our previous studies have demonstrated that the extract of Fructus Ligustri Lucidi (FLL) can maintain in vivo calcium homeostasis in aged and ovariectomized rats. This study was designed to elucidate the action of water fraction isolated from the FLL extract on bone metabolism and a calcium-sensing receptor (CaSR) in parathyroid glands and kidneys of diabetic rats. The streptozotocin-induced diabetic rats were treated with vehicle, FLL extract, and the water fraction (WF) isolated from the FLL extract for 4 weeks...
November 22, 2017: Food & Function
https://www.readbyqxmd.com/read/29164861/alcohol-soluble-isoindigo-derivative-iidth-nsb-as-a-novel-modifier-of-zno-in-inverted-polymer-solar-cells
#5
Biao Guo, Jianxiong Han, Jing Qiu, Chengzhuo Yu, Yuqian Sun, Fenghong Li, Zhonghan Hu, Yue Wang
Alcohol-soluble isoindigo derivative with thiophene groups and sulfobetain zwitterions, IIDTh-NSB was applied as a novel modifier of ZnO in the inverted polymer solar cells (i-PSCs). When IIDTh-NSB (0.2mg/mL) was spin-coated on ZnO as an electron transport layer (ETL), power conversion efficiency (PCE) of the PTB7:PC71BM based i-PSCs reached 8.88% which is a 20% improvement of that of 7.40% for the device with pure ZnO ETL. If ZnO was doped by IIDTh-NSB of 1.0 wt%, the PCE of 8.50% could be achieved in the i-PSCs...
November 22, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/29164849/an-emulsion-hydrogel-soft-motor-actuated-by-thermal-stimulation
#6
Hui Wang, Yuling Liang, Wei Gao, Renfeng Dong, Chaoyang Wang
An emulsion hydrogel motor (E-H-motor) constituted by low-boiling oil fuel and hydrogel matrix, is prepared through a simple yet versatile oil-in-water (O/W) emulsion template method. The E-H-motor can be efficiently propelled by the bubbles generated under thermal stimulus. As thermal-inducted explosion occurs inside the E-H-motor (diameter ~4.0 mm, length ~6.0 mm), the gas bubbles resulting from thermotropic phase transition are violently ejected from one side, leading to a fast speed of 14.78 ± 4.82 mm s-1 in a 60 oC aqueous solution...
November 22, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/29164515/early-life-exposure-to-cadmium-triggers-distinct-zn-dependent-protein-expression-patterns-and-impairs-brain-development
#7
Safa Ben Mimouna, Marouane Chemek, Sana Boughammoura, Mohamed Banni, Imed Messaoudi
The objective of this study was to determine if the brain development impairment induced by early-life exposure to cadmium (Cd) could result from changes in the expression pattern of distinct zinc (Zn)-dependent proteins. For this purpose, adult female rats receiving either tap water, Cd, Zn, or Cd + Zn in their drinking water during gestation and lactation periods were used. After birth, the male offspring were screened for locomotors and sensorial defects. At postnatal day 21 (PND 21), the male pups were sacrificed and their brains, liver, and plasma were taken for chemical, biochemical, and molecular analyses...
November 22, 2017: Biological Trace Element Research
https://www.readbyqxmd.com/read/29164191/characterising-the-evaporation-kinetics-of-water-and-semi-volatile-organic-compounds-from-viscous-multicomponent-organic-aerosol-particles
#8
Stephen Ingram, Chen Cai, Young-Chul Song, David R Glowacki, David O Topping, Simon O'Meara, Jonathan P Reid
The physicochemical changes experienced by organic aerosol particles undergoing dehydration into the surrounding gas phase can be drastic, forcing rapid vitrification of the particle and suppressing internal diffusion. Until recently, experimental studies have concentrated on quantifying diffusional mixing of either water or non-volatile components, while relatively little attention has been paid to the role of semivolatile organic component (SVOC) diffusion and volatilisation in maintaining the equilibrium between the gas and particle phases...
November 22, 2017: Physical Chemistry Chemical Physics: PCCP
https://www.readbyqxmd.com/read/29163672/contribution-of-riboflavin-supply-pathways-to-vibrio-cholerae-in-different-environments
#9
Andrés Fuentes Flores, Ignacio Sepúlveda Cisternas, José Ignacio Vásquez Solis de Ovando, Alexia Torres, Víctor Antonio García-Angulo
Background: The waterborne diarrheagenic bacterium Vibrio cholerae, cause of the pandemic cholera disease, thrives in a variety of environments ranging from estuarine waters to the human intestinal tract. This species has two ways to obtain the essential micronutrient riboflavin, de novo biosynthesis and environmental uptake through the RibN importer. The way these functions interrelate to fulfill riboflavin needs in different conditions in this species is unknown. Results: This study analyzed the contributions of riboflavin biosynthesis and transport to the culturability of Vibrio cholerae in river and seawater in vitro and in the Caenorhabditis elegans nematode host model...
2017: Gut Pathogens
https://www.readbyqxmd.com/read/29163621/transcript-profiling-of-hevea-brasiliensis-during-latex-flow
#10
Jinquan Chao, Shuguang Yang, Yueyi Chen, Wei-Min Tian
Latex exploitation enhances latex regeneration in rubber trees. The latex exploitation-caused latex flow lasts from 10 min to a few hours, which is convenient for exploring the transcript profiling of latex metabolism-related genes at the different stages of latex flow. In the present study, the expression pattern of 62 latex metabolism-related genes involved in water transportation, carbohydrate metabolism, natural rubber biosynthesis, hormone signaling, ROS generation and scavenging, and latex coagulum across three stages of latex flow between rubber tree clones CATAS7-33-97 and CATAS8-79 were comparatively analyzed by quantitative real-time PCR...
2017: Frontiers in Plant Science
https://www.readbyqxmd.com/read/29163608/oshak1-a-high-affinity-potassium-transporter-positively-regulates-responses-to-drought-stress-in-rice
#11
Guang Chen, Chaolei Liu, Zhenyu Gao, Yu Zhang, Hongzhen Jiang, Li Zhu, Deyong Ren, Ling Yu, Guohua Xu, Qian Qian
Drought is one of the environmental factors that severely restrict plant distribution and crop production. Recently, we reported that the high-affinity potassium transporter OsHAK1 plays important roles in K acquisition and translocation in rice over low and high K concentration ranges, however, knowledge on the regulatory roles of OsHAK1 in osmotic/drought stress is limited. Here, transcript levels of OsHAK1 were found transiently elevated by water deficit in roots and shoots, consistent with the enhanced GUS activity in transgenic plants under stress...
2017: Frontiers in Plant Science
https://www.readbyqxmd.com/read/29159348/hydrogen-evolution-from-water-based-on-plasmon-induced-charge-separation-at-a-tio2-au-nio-pt-system
#12
Kun-Che Kao, Yoshinori Kuroiwa, Hiroyasu Nishi, Tetsu Tatsuma
Metal-semiconductor plasmonic nanostructures are capable of converting light energy through plasmon-induced charge separation (PICS), providing fruitful new strategies to utilize solar energy in various fields, including photocatalysis. Here, we enhance the PICS efficiencies for hydrogen evolution from water at a Pt cathode coupled with a TiO2/Au photoanode by coating the TiO2/Au with a p-type NiO layer on which a Pt co-catalyst is deposited. PICS occurs at the Au-TiO2 interface under visible light. The electrons injected from the Au nanoparticles into TiO2 are transported to the Pt cathode and cause hydrogen evolution from water, the action spectrum of which matches the plasmonic extinction spectrum of the Au nanoparticles...
November 21, 2017: Physical Chemistry Chemical Physics: PCCP
https://www.readbyqxmd.com/read/29158980/north-atlantic-oscillation-drives-the-annual-occurrence-of-an-isolated-peripheral-population-of-the-brown-seaweed-fucus-guiryi-in-the-western-mediterranean-sea
#13
Ignacio J Melero-Jiménez, A Enrique Salvo, José C Báez, Elena Bañares-España, Andreas Reul, Antonio Flores-Moya
The canopy-forming, intertidal brown (Phaeophyceae) seaweed Fucus guiryi is distributed along the cold-temperate and warm-temperate coasts of Europe and North Africa. Curiously, an isolated population develops at Punta Calaburras (Alboran Sea, Western Mediterranean) but thalli are not present in midsummer every year, unlike the closest (ca. 80 km), perennial populations at the Strait of Gibraltar. The persistence of the alga at Punta Calaburras could be due to the growth of resilient, microscopic stages as well as the arrival of few-celled stages originating from neighbouring localities, and transported by the permanent Atlantic Jet flowing from the Atlantic Ocean into the Mediterranean...
2017: PeerJ
https://www.readbyqxmd.com/read/29158619/the-effect-of-mineral-based-alkaline-water-on-hydration-status-and-the-metabolic-response-to-short-term-anaerobic-exercise
#14
Jakub Chycki, Tomasz Zając, Adam Maszczyk, Anna Kurylas
Previously it was demonstrated that mineralization and alkalization properties of mineral water are important factors influencing acid-base balance and hydration in athletes. The purpose of this study was to investigate the effects of drinking different types of water on urine pH, specific urine gravity, and post-exercise lactate utilization in response to strenuous exercise. Thirty-six male soccer players were divided into three intervention groups, consuming around 4.0 l/day of different types of water for 7 days: HM (n=12; highly mineralized water), LM (n=12; low mineralized water), and CON (n=12; table water)...
September 2017: Biology of Sport
https://www.readbyqxmd.com/read/29158540/calcium-binding-and-voltage-gating-in-cx46-hemichannels
#15
Bernardo I Pinto, Amaury Pupo, Isaac E García, Karel Mena-Ulecia, Agustín D Martínez, Ramón Latorre, Carlos Gonzalez
The opening of connexin (Cx) hemichannels in the membrane is tightly regulated by calcium (Ca(2+)) and membrane voltage. Electrophysiological and atomic force microscopy experiments indicate that Ca(2+) stabilizes the hemichannel closed state. However, structural data show that Ca(2+) binding induces an electrostatic seal preventing ion transport without significant structural rearrangements. In agreement with the closed-state stabilization hypothesis, we found that the apparent Ca(2+) sensitivity is increased as the voltage is made more negative...
November 20, 2017: Scientific Reports
https://www.readbyqxmd.com/read/29157153/evaluation-of-industrial-byproducts-and-natural-minerals-for-phosphate-adsorption-from-subsurface-drainage
#16
Bjorn M Sellner, Guanghui Hua, Laurent M Ahiablame, Todd P Trooien, Christopher H Hay, Jeppe Kjaersgaard
Agricultural subsurface drainage has been recognized as an important pathway for phosphorus transport from soils to surface waters. Reactive permeable filters are a promising technology to remove phosphate from subsurface drainage. Three natural minerals (limestone, zeolite, and calcite) and five industrial byproducts (steel slag, iron filings, and three recycled steel byproducts) were evaluated for phosphate removal from subsurface drainage using batch adsorption experiments. Phosphate adsorption onto these materials were characterized by Langmuir isotherm and second order kinetic models...
November 20, 2017: Environmental Technology
https://www.readbyqxmd.com/read/29156441/modeling-spray-drift-and-runoff-related-inputs-of-pesticides-to-receiving-water
#17
Xuyang Zhang, Yuzhou Luo, Kean S Goh
Pesticides move to surface water via various pathways including surface runoff, spray drift and subsurface flow. Little is known about the relative contributions of surface runoff and spray drift in agricultural watersheds. This study develops a modeling framework to address the contribution of spray drift to the total loadings of pesticides in receiving water bodies. The modeling framework consists of a GIS module for identifying drift potential, the AgDRIFT model for simulating spray drift, and the Soil and Water Assessment Tool (SWAT) for simulating various hydrological and landscape processes including surface runoff and transport of pesticides...
November 17, 2017: Environmental Pollution
https://www.readbyqxmd.com/read/29156437/home-composting-using-different-ratios-of-bulking-agent-to-food-waste
#18
Lucas Lourenço Castiglioni Guidoni, Roger Vasques Marques, Rodrigo Bilhalva Moncks, Fabiana Torma Botelho, Matheus Francisco da Paz, Luciara Bilhalva Corrêa, Érico Kunde Corrêa
The negative environmental impacts associated with home composting may be due to the absence of a defined operation criteria for the degradation process. In addition to the potentially low environmental impact in terms of energy and water usage, which is minimal to the manufacture of the composting unit and avoiding the processing and transportation of waste or byproduct, composting at home can also promote a reduction in the emission of unpleasant gases. The proportion of the food waste and bulking agents in the composting mixture may be decisive to fulfill good practices of waste stabilization...
November 17, 2017: Journal of Environmental Management
https://www.readbyqxmd.com/read/29156432/the-effects-of-human-drugs-in-corbicula-fluminea-assessment-of-neurotoxicity-inflammation-gametogenic-activity-and-energy-status
#19
G V Aguirre-Martínez, C André, F Gagné, L M Martín-Díaz
The constant release of pharmaceuticals products to aquatic environment even at low concentrations (ng L(-1) to µg L(-1)) could lead to unknown chronic effects to non-target organisms. The aim of this study was to evaluate neurotoxic responses, inflammation, gametogenic activity and energy status on the fresh water clam C. fluminea after exposure to different concentrations of caffeine (CAF), ibuprofen (IBU), carbamazepine (CBZ), novobiocin (NOV) and tamoxifen (TMX) for 21 days under laboratory conditions...
November 17, 2017: Ecotoxicology and Environmental Safety
https://www.readbyqxmd.com/read/29156343/native-and-exotic-oysters-in-brazil-comparative-tolerance-to-hypercapnia
#20
Anthony Moreira, Etelvina Figueira, Iracy L Pecora, Amadeu M V M Soares, Rosa Freitas
Environmental hypercapnia in shallow coastal marine ecosystems can be exacerbated by increasing levels of atmospheric CO2. In these ecosystems organisms are expected to become increasingly subjected to pCO2 levels several times higher than those inhabiting ocean waters (e.g.: 10,000µatm), but still our current understanding on different species capacity to respond to such levels of hypercapnia is limited. Oysters are among the most important foundation species inhabiting these coastal ecosystems, although natural oyster banks are increasingly threatened worldwide...
November 17, 2017: Environmental Research
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