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https://www.readbyqxmd.com/read/28808710/interface-nanoparticle-control-of-a-nanometer-water-pump
#1
Jiaye Su, Yunzhen Zhao, Chang Fang, Syed Bilal Ahmed, Yue Shi
Nanoparticles are highly versatile and exhibit broad applications in tuning material properties. Herein, we show through molecular dynamics simulations the possibility of a nanometer water pump, driven by the motion of nanoparticles (NPs) on a membrane surface. Surprisingly, considerable net water flux can be induced through a carbon nanotube (CNT) that is perpendicular to the NP motion. The water transport can occur in a highly controllable fashion, not only by using a single NP with different forces, but also by varying the CNT length or the NP number...
August 15, 2017: Physical Chemistry Chemical Physics: PCCP
https://www.readbyqxmd.com/read/28605077/highly-flexible-and-efficient-solar-steam-generation-device
#2
Chaoji Chen, Yiju Li, Jianwei Song, Zhi Yang, Yudi Kuang, Emily Hitz, Chao Jia, Amy Gong, Feng Jiang, J Y Zhu, Bao Yang, Jia Xie, Liangbing Hu
Solar steam generation with subsequent steam recondensation has been regarded as one of the most promising techniques to utilize the abundant solar energy and sea water or other unpurified water through water purification, desalination, and distillation. Although tremendous efforts have been dedicated to developing high-efficiency solar steam generation devices, challenges remain in terms of the relatively low efficiency, complicated fabrications, high cost, and inability to scale up. Here, inspired by the water transpiration behavior of trees, the use of carbon nanotube (CNT)-modified flexible wood membrane (F-Wood/CNTs) is demonstrated as a flexible, portable, recyclable, and efficient solar steam generation device for low-cost and scalable solar steam generation applications...
August 2017: Advanced Materials
https://www.readbyqxmd.com/read/28593947/water-pumping-in-mantle-shear-zones
#3
Jacques Précigout, Cécile Prigent, Laurie Palasse, Anthony Pochon
Water plays an important role in geological processes. Providing constraints on what may influence the distribution of aqueous fluids is thus crucial to understanding how water impacts Earth's geodynamics. Here we demonstrate that ductile flow exerts a dynamic control on water-rich fluid circulation in mantle shear zones. Based on amphibole distribution and using dislocation slip-systems as a proxy for syn-tectonic water content in olivine, we highlight fluid accumulation around fine-grained layers dominated by grain-size-sensitive creep...
June 8, 2017: Nature Communications
https://www.readbyqxmd.com/read/28592103/-association-of-etheno-dna-adduct-and-dna-methylation-level-among-workers-exposed-to-diesel-engine-exhaust
#4
M L Shen, Z N He, X Zhang, H W Duan, Y Niu, P Bin, M Ye, T Meng, Y F Dai, S F Yu, W Chen, Y X Zheng
Objective: To investigate the association between etheno-DNA adduct and the promoter of DNA methylation levels of cyclin dependent kinase inhibitor 2A (P16), Ras association domain family 1 (RASSF1A) and O-6-methylguanine-DNA methyltransferase (MGMT) in workers with occupational exposure to diesel engine exhaust (DEE). Methods: We recruited 124 diesel engine testing workers as DEE exposure group and 112 water pump operator in the same area as control group in Henan province in 2012 using cluster sampling. The demographic data were obtained by questionnaire survey; urine after work and venous blood samples were collected from each subject...
June 6, 2017: Zhonghua Yu Fang Yi Xue za Zhi [Chinese Journal of Preventive Medicine]
https://www.readbyqxmd.com/read/28450992/-study-of-the-bacteriological-quality-of-water-used-in-the-agro-food-industry-in-the-north-of-morocco
#5
El Houcine Haijoubi, Fatiha Benyahya, Abdrezzak Bendahou, Faima Zahra Essadqui, Mohammed El Behhari, Ahmed Fouad El Mamoune, Naima Nourouti Ghailani, Mohcine Bennani Mechita, Amina Barakat
INTRODUCTION: Water is used predominantly in food manufacturing process. Northern morocco agro-food industries use different sources of water, but public water and wells water are the main sources of water used. This water can be the main source of possible food contaminations and alterations. This study aims is to assess the bacteriological quality of water used in the agro-food industries in the Northern region of Morocco, to identify the different types of germs responsible for the pollution of these waters and to establish the main causes of this pollution...
2017: Pan African Medical Journal
https://www.readbyqxmd.com/read/28050058/sustainable-crop-intensification-through-surface-water-irrigation-in-bangladesh-a-geospatial-assessment-of-landscape-scale-production-potential
#6
Timothy J Krupnik, Urs Schulthess, Zia Uddin Ahmed, Andrew J McDonald
Changing dietary preferences and population growth in South Asia have resulted in increasing demand for wheat and maize, along side high and sustained demand for rice. In the highly productive northwestern Indo-Gangetic Plains of South Asia, farmers utilize groundwater irrigation to assure that at least two of these crops are sequenced on the same field within the same year. Such double cropping has had a significant and positive influence on regional agricultural productivity. But in the risk-prone and food insecure lower Eastern Indo-Gangetic Plains (EIGP), cropping is less intensive...
January 2017: Land Use Policy
https://www.readbyqxmd.com/read/27785717/effects-of-a-commonly-used-glyphosate-based-herbicide-formulation-on-early-developmental-stages-of-two-anuran-species
#7
Norman Wagner, Hendrik Müller, Bruno Viertel
Environmental contamination, especially due to the increasing use of pesticides, is suggested to be one out of six main reasons for the global amphibian decline. Adverse effects of glyphosate-based herbicides on amphibians have been already discussed in several studies with different conclusions, especially regarding sublethal effects at environmentally relevant concentrations. Therefore, we studied the acute toxic effects (mortality, growth, and morphological changes) of the commonly used glyphosate-based herbicide formulation Roundup® UltraMax on early aquatic developmental stages of two anuran species with different larval types (obligate vs...
January 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/27780100/hydrochemical-characterization-of-a-mine-water-geothermal-energy-resource-in-nw-spain
#8
C Loredo, A Ordóñez, E Garcia-Ordiales, R Álvarez, N Roqueñi, P Cienfuegos, A Peña, N M Burnside
Abandoned and flooded mine networks provide underground reservoirs of mine water that can be used as a renewable geothermal energy source. A complete hydrochemical characterization of mine water is required to optimally design the geothermal installation, understand the hydraulic behavior of the water in the reservoir and prevent undesired effects such as pipe clogging via mineral precipitation. Water pumped from the Barredo-Figaredo mining reservoir (Asturias, NW Spain), which is currently exploited for geothermal use, has been studied and compared to water from a separate, nearby mountain mine and a river that receives mine water discharge and partially infiltrates into the mine workings...
January 15, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/27738864/contribution-of-urban-runoff-in-taipei-metropolitan-area-to-dissolved-inorganic-nitrogen-export-in-the-danshui-river-taiwan
#9
Nae-Wen Kuo, Shih-Hao Jien, Nien-Ming Hong, Yao-Te Chen, Tsung-Yu Lee
A previous study has demonstrated that Danshui River has almost the highest dissolved inorganic nitrogen (DIN) yield in the world and exports most of the DIN in the form of ammonium unlike the world's large rivers. However, the DIN sources are poorly constrained. In this study, the contributions of major sources in the Taipei metropolitan area to the DIN export in the Danshui River were investigated. It is observed that ammonium is the major DIN species in the downstream reaches, resulting from the ammonium-dominated inputs of the effluents of wastewater treatment plants (WWTP) and rain water pumping stations (RWPS)...
January 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/27686719/developing-a-water-circulating-column-photobioreactor-for-microalgal-growth-with-low-energy-consumption
#10
Zongbo Yang, Jun Cheng, Weijuan Yang, Junhu Zhou, Kefa Cen
A water-circulating column photobioreactor (WCC-PBR) was developed to decrease bubble generation time and mixing time for growing microalgal biomass at low energy consumption. Bubble generation time was decreased by 60.4% and mixing time was decreased by 41.5% owing to an enhanced solution velocity with a water pump. Bubble residence time was decreased by 31.1% and mass transfer coefficient was decreased by 0.4% owing to a reduced distance between air aerator and solution surface. Microalgal growth rate was decreased by 12...
December 2016: Bioresource Technology
https://www.readbyqxmd.com/read/27661599/intensity-symmetric-accelerating-caustic-beams
#11
Zhijun Ren, Hongzhen Jin, Baojin Peng, Yile Shi
We construct and generate symmetric accelerating caustic beams (ACBs) by using 3/2-order phase-only masks with elliptical contour based on optical caustics and diffraction theory. The symmetric ACBs are a type of bimodal accelerating caustic beam with two quasi-constant intensity peaks, very similar to the combination of two face-to-face Airy-like beams judging by appearance. Their fundamental optical morphology and force properties of particles in ACBs are subsequently provided. The unique optical properties of ACBs can be exploited for practical uses, such as accelerating electrons and clearing micrometer-sized particles as a laser micrometer-sized "water pump" instead of a laser micrometer-sized "snowblower" of accelerating Airy beams...
September 20, 2016: Applied Optics
https://www.readbyqxmd.com/read/27637497/changes-in-health-and-antiretroviral-adherence-among-hiv-infected-adults-in-kenya-qualitative-longitudinal-findings-from-a-livelihood-intervention
#12
Sheri D Weiser, Abigail M Hatcher, Lee L Hufstedler, Elly Weke, Shari L Dworkin, Elizabeth A Bukusi, Rachel L Burger, Stephen Kodish, Nils Grede, Lisa M Butler, Craig R Cohen
This longitudinal qualitative study sought to understand how and why a livelihood intervention affected the health and health behaviors of HIV-infected Kenyan adults. The intervention included a microfinance loan, agricultural and financial training, and a human-powered water pump. In-depth interviews were conducted at two time points with intervention and control participants and program staff. We double coded interviews (n = 117) and used thematic content analysis of transcripts following an integrative inductive-deductive approach...
February 2017: AIDS and Behavior
https://www.readbyqxmd.com/read/27420529/phase-interfacial-stimulated-raman-scattering-generated-in-strongly-pumped-water
#13
Hong Yuan, Baodong Gai, Jinbo Liu, Jingwei Guo, Hui Li, Shu Hu, Liezheng Deng, Yuqi Jin, Fengting Sang
We have observed unusual blue-shifted radiations in water pumped by a strong 532-nm nanosecond laser. Properties including divergence, polarizations, and pulse shapes of the unusual radiations are measured and compared with those of the regular stimulated Raman scattering (SRS) in water. The unusual radiations are attributed to the parametric anti-Stokes SRS that occurs on the interface of water and ionization plasma (or gas) formed in the laser-induced breakdown of water.
July 15, 2016: Optics Letters
https://www.readbyqxmd.com/read/27384226/water-balance-and-irrigation-water-pumping-of-lake-merdada-for-potato-farming-in-dieng-highland-indonesia
#14
Lintang N Fadlillah, M Widyastuti
Lakes provide water resources for domestic use, livestock, irrigational use, etc. Water availability of lakes can be estimated using lake water balance. Lake water balance is calculated from the water input and output of a lake. Dieng Highland has several volcanic lakes in its surroundings. Lake Merdada in Dieng Highland has been experiencing extensive water pumping for several years more than other lakes in the surrounding area. It provides irrigation water for potato farming in Dieng Highland. The hydrological model of this lake has not been studied...
August 2016: Environmental Monitoring and Assessment
https://www.readbyqxmd.com/read/27363722/influence-of-metals-on-the-cyanobacterial-community-in-a-water-supply-system-in-a-tropical-region
#15
Valderice P A Baydum, Fábio H P C Oliveira
  This work aimed to study the influence of metals on the temporal dynamics of cyanobacteria community in Carpina Dam (7° 53' 22'' S and 35° 20' 34'' W). Samples were collected from Raw Water Pumping Station at the Water Treatment Station Feira Nova in the city of Feira Nova (Pernambuco, Brazil), from January 2011 to December 2013. The concentration of metals in water (aluminum, antimony, barium, lead, copper, chromium, cadmium, iron, manganese) was determined by atomic absorption spectroscopy in the laboratory...
January 1, 2017: Water Environment Research: a Research Publication of the Water Environment Federation
https://www.readbyqxmd.com/read/27243604/improving-microalgal-growth-with-small-bubbles-in-a-raceway-pond-with-swing-gas-aerators
#16
Zongbo Yang, Jun Cheng, Jianzhong Liu, Junhu Zhou, Kefa Cen
A novel swing gas aerator was developed to generate small bubbles for improving the mass transfer coefficient and microalgal growth rate in a raceway pond. A high-speed photography system (HSP) was used to measure the bubble diameter and generation time, and online precise dissolved oxygen probes and pH probes were used to measure the mass transfer coefficient and mixing time. Bubble generation time and diameter decreased by 21% and 9%, respectively, when rubber gas aerators were swung in the microalgae solution...
September 2016: Bioresource Technology
https://www.readbyqxmd.com/read/27077957/implications-of-transitioning-from-de-facto-to-engineered-water-reuse-for-power-plant-cooling
#17
Zachary A Barker, Ashlynn S Stillwell
Thermoelectric power plants demand large quantities of cooling water, and can use alternative sources like treated wastewater (reclaimed water); however, such alternatives generate many uncertainties. De facto water reuse, or the incidental presence of wastewater effluent in a water source, is common at power plants, representing baseline conditions. In many cases, power plants would retrofit open-loop systems to cooling towers to use reclaimed water. To evaluate the feasibility of reclaimed water use, we compared hydrologic and economic conditions at power plants under three scenarios: quantified de facto reuse, de facto reuse with cooling tower retrofits, and modeled engineered reuse conditions...
May 17, 2016: Environmental Science & Technology
https://www.readbyqxmd.com/read/27023354/in-situ-fabrication-and-investigation-of-nanostructures-and-nanodevices-with-a-microscope
#18
Qi Zhang, Huiqiao Li, Lin Gan, Ying Ma, Dmitri Golberg, Tianyou Zhai
The widespread availability of nanostructures and nanodevices has placed strict requirements on their comprehensive characterization. Herein, in situ techniques are demonstrated to have created a rare opportunity to accurately analyze the intrinsic properties of individual nanostructures and to accomplish the smart design of nanodevices made from these nanostructures. This paper reviews recent developments in in situ fabrication and characterization technologies established within various types of microscopes and the rich information they may provide...
May 7, 2016: Chemical Society Reviews
https://www.readbyqxmd.com/read/26950129/a-secure-intelligent-and-smart-sensing-approach-for-industrial-system-automation-and-transmission-over-unsecured-wireless-networks
#19
Aamir Shahzad, Malrey Lee, Neal Naixue Xiong, Gisung Jeong, Young-Keun Lee, Jae-Young Choi, Abdul Wheed Mahesar, Iftikhar Ahmad
In Industrial systems, Supervisory control and data acquisition (SCADA) system, the pseudo-transport layer of the distributed network protocol (DNP3) performs the functions of the transport layer and network layer of the open systems interconnection (OSI) model. This study used a simulation design of water pumping system, in-which the network nodes are directly and wirelessly connected with sensors, and are monitored by the main controller, as part of the wireless SCADA system. This study also intends to focus on the security issues inherent in the pseudo-transport layer of the DNP3 protocol...
2016: Sensors
https://www.readbyqxmd.com/read/26945065/the-sodium-glucose-cotransporter-sglt1-is-an-extremely-efficient-facilitator-of-passive-water-transport
#20
Liudmila Erokhova, Andreas Horner, Nicole Ollinger, Christine Siligan, Peter Pohl
The small intestine is void of aquaporins adept at facilitating vectorial water transport, and yet it reabsorbs ∼8 liters of fluid daily. Implications of the sodium glucose cotransporter SGLT1 in either pumping water or passively channeling water contrast with its reported water transporting capacity, which lags behind that of aquaporin-1 by 3 orders of magnitude. Here we overexpressed SGLT1 in MDCK cell monolayers and reconstituted the purified transporter into proteoliposomes. We observed the rate of osmotic proteoliposome deflation by light scattering...
April 29, 2016: Journal of Biological Chemistry
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