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https://www.readbyqxmd.com/read/28241433/fogging-control-on-ldpe-eva-coextruded-films-wettability-behavior-and-its-correlation-with-electric-performance
#1
Miguel A Waldo-Mendoza, Zoe V Quiñones-Jurado, Juan C Pérez-Medina, Bernardo Yañez-Soto, Pedro E Ramírez-González
The transformation of fog at a non-visible water layer on a membrane of low-density polyethylene (LDPE) and ethylene-vinyl acetate (EVA) was evaluated. Nonionic surfactants of major demand in the polyolefin industry were studied. A kinetic study using a hot fog chamber showed that condensation is controlled by both the diffusion and permanency of the surfactant more than by the change of the surface energy developed by the wetting agents. The greatest permanency of the anti-fog effect of the LDPE/EVA surface was close to 3000 h...
February 22, 2017: Membranes
https://www.readbyqxmd.com/read/28240223/the-world-s-earliest-aral-sea-type-disaster-the-decline-of-the-loulan-kingdom-in-the-tarim-basin
#2
Steffen Mischke, Chenglin Liu, Jiafu Zhang, Chengjun Zhang, Hua Zhang, Pengcheng Jiao, Birgit Plessen
Remnants of cities and farmlands in China's hyperarid Tarim Basin indicate that environmental conditions were significantly wetter two millennia ago in a region which is barren desert today. Historical documents and age data of organic remains show that the Loulan Kingdom flourished during the Han Dynasty (206 BCE-220 CE) but was abandoned between its end and 645 CE. Previous archaeological, geomorphological and geological studies suggest that deteriorating climate conditions led to the abandonment of the ancient desert cities...
February 27, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28239860/hypovitaminosis-a-in-extensively-grazed-beef-cattle
#3
E M Parker, C P Gardiner, A E Kessell, A J Parker
CASE REPORT: Vitamin A deficiency was diagnosed in a herd of 97 19-month-old Braford heifers in the Mitchell Grass Downs (Astrebla spp.) bioregion of Hughenden in north-western Queensland during November 2015. Two heifers died after a 48-h history of sternal recumbency and of the 19 that had neurological signs, 7 were blind. Histological changes in the optic nerves of the two necropsied cattle were consistent with vitamin A deficiency. This diagnosis was supported by vitamin A concentrations in fresh liver samples of 5 and 6 mg/kg wet tissue (reference range, 100-175 mg/kg) despite treatment of the cattle with twice the recommended dose of parenteral vitamin A 3 weeks prior to sampling...
March 2017: Australian Veterinary Journal
https://www.readbyqxmd.com/read/28239734/study-of-the-role-of-oxygen-vacancies-as-active-sites-in-reduced-graphene-oxide-modified-tio2
#4
Yanhui Zhang, Rongying Dai, Shirong Hu
In recent years, substantial efforts have been devoted to exploring reduced graphene oxide/TiO2 (RGO/TiO2) composite materials; however, there is still a paucity of reports on the construction of reduced graphene oxide/TiO2 with oxygen vacancies (RGO/TiO2-OV) via a facile two-step wet chemistry approach. In this work, we show a proof-of-concept study follow RGO introduced into TiO2 with oxygen vacancies, the role of oxygen vacancies as active sites in reduced graphene oxide-modified TiO2. The photocatalytic performance and related properties of blank-TiO2, blank-TiO2 with oxygen vacancies (blank-TiO2-OV), RGO/TiO2, and RGO/TiO2-OV were comparatively studied...
February 27, 2017: Physical Chemistry Chemical Physics: PCCP
https://www.readbyqxmd.com/read/28238432/impact-of-irrigation-based-sugarcane-cultivation-on-the-chiredzi-and-runde-rivers-quality-zimbabwe
#5
Tamuka Nhiwatiwa, Tatenda Dalu, Luc Brendonck
Agriculture is vital in sustaining human livelihoods. However, agriculture as it is currently practiced, is contributing to the degradation of freshwater ecosystems globally. We investigated impacts of irrigation return flows from sugarcane farming on water quality and health status of the Chiredzi and Runde Rivers, a biodiversity hotspot region in south-eastern Lowveld of Zimbabwe. The water quality at inlets from the crop field into the wetland system; wetland outlets into the river systems; and river sites upstream and downstream of wetland outlets were monitored during the dry and wet seasons...
February 23, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28237574/cellulose-nanocomposite-films-with-in-situ-generated-silver-nanoparticles-using-cassia-alata-leaf-extract-as-a-reducing-agent
#6
P Sivaranjana, E R Nagarajan, N Rajini, M Jawaid, A Varada Rajulu
Cotton linters were dissolved in aq. (8%LiOH+15% Urea) that was pre-cooled to -12.5°C. Using this solution cellulose gel films were prepared by regeneration method with ethyl alcohol as a coagulant. These wet films were diffused with 10wt. % Cassia alata leaf extract that acted as a reducing agent. The leaf extract diffused cellulose wet films were used as the matrix. The wet matrix films were dipped individually in lower concentrated 1mM to 5mM aq.AgNO3 source solutions in the presence of sunlight and allowed the solutions to react with the diffused leaf extract reducing agent which in situ generated the silver nanoparticles (AgNPs) inside the films as well as in the source solution...
February 22, 2017: International Journal of Biological Macromolecules
https://www.readbyqxmd.com/read/28237569/preparation-and-characterization-of-novel-super-artificial-hair-fiber-based-on-biomass-materials
#7
Lijun Yang, Jing Guo, Sen Zhang, Yumei Gong
A novel super-artificial hair fiber basing on sodium alginate (SA) and Antarctic Krill protein (AKP) was prepared by wet spinning successfully. Such SA/AKP fiber did not only have similar crystalline structure with human hair, but also had super flame resistance and mechanical performance. It should be noted that the whole preparation process was green without any incorporation of non-toxic solution. Moreover, comparing with human hair, the SA/AKP fiber had a lot of unique groove upon the fiber surface, which contributed a lot to excellent hygroscopicity...
February 22, 2017: International Journal of Biological Macromolecules
https://www.readbyqxmd.com/read/28237480/preventive-and-therapeutic-effect-of-simvastatin-on-secondary-inflammatory-damage-of-rats-with-cerebral-hemorrhage
#8
Hong-Xia Zhou, Ling-Huan Gao, Ling-Li Meng, Yu-Xin Zhang, Zi-Feng Wei, Dao-Wen Si
OBJECTIVE: To investigate the preventive and therapeutic effect and mechanism of simvastatin on secondary inflammatory damage of rats with cerebral hemorrhage. METHODS: Sixty SD rat aged 9-12 weeks were chosen and divided into the control group, model group and simvastatin-treated group randomly with 20 rats in each group. Rats in the model group and simvastatin-treated group were infused with autologous fresh uncoagulated blood to the right brain tissue of the basal ganglia to build the cerebral hemorrhage model, while rats in the control group were treated with the same amount of normal saline...
February 2017: Asian Pacific Journal of Tropical Medicine
https://www.readbyqxmd.com/read/28237466/observation-of-nitrous-acid-hono-in-beijing-china-seasonal-variation-nocturnal-formation-and-daytime-budget
#9
Jiaqi Wang, Xiaoshan Zhang, Jia Guo, Zhangwei Wang, Meigen Zhang
Seasonal characteristics of atmospheric nitrous acid (HONO) were investigated with high time-resolution field measurements at an urban site of Beijing in four select months (representing four different seasons) from September 2015 to July 2016. The HONO concentrations displayed a pronounced seasonal profile with a maximum in autumn (2.27±1.82ppb) and a minimum in winter (1.05±0.89ppb). Significant diurnal cycles were also observed during the whole campaign. We found that the nighttime build-up of HONO was attributed to the heterogeneous conversion of NO2 on wet surface...
February 23, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28237461/the-history-of-mercury-pollution-near-the-spolana-chlor-alkali-plant-neratovice-czech-republic-as-recorded-by-scots-pine-tree-rings-and-other-bioindicators
#10
Tomáš Navrátil, Martin Šimeček, James B Shanley, Jan Rohovec, Maria Hojdová, Jakub Houška
We assessed >100years of mercury (Hg) pollution recorded in the tree rings of Scots Pine near a Czech chlor-alkali plant operating since 1941. Hg concentrations in tree rings increased with the launching of plant operations and decreased when Hg emissions decreased in 1975 due to an upgrade in production technology. Similar to traditional bioindicators of pollution such as pine needles, bark and forest floor humus, Hg concentrations in Scots Pine boles decreased with distance from the plant. Mean Hg in pine bole in the 1940s ranged from 32...
February 22, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28237409/water-equivalent-thickness-of-immobilization-devices-in-proton-therapy-planning-modelling-at-treatment-planning-and-validation-by-measurements-with-a-multi-layer-ionization-chamber
#11
Francesco Fellin, Roberto Righetto, Giovanni Fava, Diego Trevisan, Dante Amelio, Paolo Farace
PURPOSE: To investigate the range errors made in treatment planning due to the presence of the immobilization devices along the proton beam path. METHODS: The measured water equivalent thickness (WET) of selected devices was measured by a high-energy spot and a multi-layer ionization chamber and compared with that predicted by treatment planning system (TPS). Two treatment couches, two thermoplastic masks (both un-stretched and stretched) and one headrest were selected...
February 22, 2017: Physica Medica: PM
https://www.readbyqxmd.com/read/28237308/exposure-assessment-of-pcdd-fs-for-the-population-living-in-the-vicinity-of-municipal-waste-incinerator-additional-exposure-via-local-vegetable-consumption
#12
Yujie Ben, Tong Li, Yi Wan, Zhaomin Dong, Jianying Hu
While the exposure assessment of polychlorinated dibenzo-p-dioxin and polychlorinated dibenzofuran (PCDD/Fs) for people living in the vicinity of municipal solid waste incinerators (MSWI) has been investigated, indirect exposure to MSWI-emitted PCDD/Fs via consumption of local foods has not been well assessed. In this study, the PCDD/F concentration in the local vegetables grown near a MSWI located in Shenzhen, South China, was determined to be 0.92 ± 0.59 pg/g wet weight (ww), significantly higher than that (0...
February 22, 2017: Environmental Pollution
https://www.readbyqxmd.com/read/28236707/effect-of-landscape-tree-cover-sex-and-season-on-the-bioaccumulation-of-persistent-organochlorine-pesticides-in-fruit-bats-of-riparian-corridors-in-eastern-mexico
#13
Carolina Valdespino, Vinicio J Sosa
Riparian forests are recognized as important ecosystems for biodiversity conservation in transformed landscapes. Many animal species that use this type of vegetation facilitate its recovery through pollination and seed dispersal. In landscapes dominated by agrosystems and cattle ranching, persistent organochlorine pesticides (OCPs) in the riparian system may have an effect on the physiology and fitness of animals. In this study, we measured bioaccumulation of OCPs in the most abundant frugivorous bat, Sturnira hondurensis, from the upper part of La Antigua basin, Veracruz, Mexico and, from these data, estimated accumulation by the frugivorous bat community of riparian forests in contrasting, transformed (TL) and forested (FL) landscapes...
February 15, 2017: Chemosphere
https://www.readbyqxmd.com/read/28236696/effect-of-ethyl-ester-l-lysine-triisocyanate-addition-to-produce-reactive-pla-pcl-bio-polyester-blends-for-biomedical-applications
#14
Annamaria Visco, Davide Nocita, Alberto Giamporcaro, Sara Ronca, Giuseppe Forte, Alessandro Pistone, Claudia Espro
We report in this paper the effects of Ethyl Ester L-Lysine Triisocyanate (LTI) on the physical-mechanical properties of Poly(lactide)/Poly(ε-caprolactone) (PLA/PCL) polyesters blends. The PLA/PCL ratios considered were 20/80, 50/50 and 80/20 (wt/wt %) and LTI was added in amounts of 0.0-0.5-1.0 phr. PLA and PCL reacted with LTI during processing in a Brabender twin screw internal mixer to produce block copolymers in-situ. The resulting blends have been characterized by torque measurements, uniaxial tensile tests, Differential Scanning Calorimeter, contact angle measurements with a Phosphate Buffered Saline (PBS) solution, ATR analysis and morphological SEM observations...
February 16, 2017: Journal of the Mechanical Behavior of Biomedical Materials
https://www.readbyqxmd.com/read/28236694/on-the-mechanical-characteristics-of-a-self-setting-calcium-phosphate-cement
#15
A Bimis, L P Canal, D Karalekas, J Botsis
OBJECTIVE: To perform a mechanical characterization of a self-setting calcium phosphate cement in function of the immersion time in Ringer solution. MATERIALS AND METHODS: Specimens of self-setting calcium phosphate cement were prepared from pure α-TCP powder. The residual strains developed during hardening stage were monitored using an embedded fiber Bragg grating sensor. Additionally, the evolution of the elastic modulus was obtained for the same time period by conducting low-load indentation tests...
February 14, 2017: Journal of the Mechanical Behavior of Biomedical Materials
https://www.readbyqxmd.com/read/28236604/using-prompted-voiding-to-manage-urinary-incontinence-in-nursing-homes-can-it-be-sustained
#16
Claudia K Y Lai, Xiaojuan Wan
OBJECTIVES: Studies reporting prompted voiding (PV) interventions were of short duration and were delivered by research personnel rather than nursing home staff. This study examined the effectiveness of the use of PV by nursing home staff in managing urinary incontinence among residents over a 6-month period. DESIGN: A randomized controlled trial. SETTING: Five nursing homes in Hong Kong. PARTICIPANTS: Data were collected from 52 nursing home residents who had been admitted to the facility for at least 6 months prior to the initiation of the study and whose incontinence had been stable over the 6-month period...
February 21, 2017: Journal of the American Medical Directors Association
https://www.readbyqxmd.com/read/28236203/analysis-of-certain-fatty-acids-and-toxic-metal-bioaccumulation-in-various-tissues-of-three-fish-species-that-are-consumed-by-turkish-people
#17
Gökçe Kaya, Semra Türkoğlu
Concentrations of toxic metals (Mn, Ni, Hg, Cd, Pb, Cr) in the muscle, skin, and liver of Mugil cephalus, Mullus barbatus, and Pagellus erythrinus which were purchased in large supermarkets of Elazig, and Mullus barbatus, which were caught on the sea of İskenderun Bay, Turkey, were analyzed. Fundamental analyses were carried out by inductively coupled plasma-mass spectrometry (ICP-MS) after samples were prepared by microwave digestion. Mean metal concentrations in different tissues were varied in the ranges of Cd 4-426, Cr 116-4458, Mn 141-24774, Hg 9-471, Pb 96-695, and Ni 68-6581 μg kg(-1), for wet weight...
February 25, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/28235909/crying-a-river-how-much-salt-laden-jelly-can-a-leatherback-turtle-really-eat
#18
John Davenport
Leatherback turtles (Dermochelys coriacea) are capital breeders that accumulate blubber (33 kJ g wet mass(-1)) by hyperphagia on a gelatinous diet at high latitudes; they breed in the tropics. A jellyfish diet is energy-poor (0.1-0.2 kJ g wet mass(-1)), so leatherbacks must ingest large quantities. Two published estimates of feeding rate (50% body mass d(-1) (on Rhizostoma pulmo), 73% body mass d(-1) (on Cyanea capillata)) have been criticised as too high. Jellyfish have high salt and water contents that must be removed to access organic material and energy...
February 24, 2017: Journal of Experimental Biology
https://www.readbyqxmd.com/read/28231409/lip-and-tooth-injuries-at-public-swimming-pools-in-austria
#19
Katharina Lechner, Thomas Connert, Sebastian Kühl, Andreas Filippi
BACKGROUND/AIM: There is an increased risk of orofacial injuries in swimming pool facilities. Nevertheless, only a few studies have addressed this issue. The aim of this study was to identify the frequency of lip and tooth injuries at public swimming pools in Austria. A further aim was to examine which gender and age groups were affected, where and why these injuries occurred, and whether pool attendants had sufficient knowledge of dental first aid measures. MATERIAL AND METHODS: A total of 764 pool attendants in Austria were contacted by telephone and 689 participated in the study (90...
February 23, 2017: Dental Traumatology: Official Publication of International Association for Dental Traumatology
https://www.readbyqxmd.com/read/28231080/oxalate-content-of-taro-leaves-grown-in-central-vietnam
#20
Hang Du Thanh, Hai Phan Vu, Hai Vu Van, Ngoan Le Duc, Tuan Le Minh, Geoffrey Savage
Leaves were harvested from four different cultivars of Colocasia esculenta and three cultivars of Alocasia odora that were growing on nine different farms in central Vietnam. The total, soluble and insoluble oxalate contents of the leaves were extracted and measured using HPLC chromatography. Total calcium determinations were also carried out on the same samples. The total oxalate content of the leaves ranged from 433.8 to 856.1 mg/100 g wet matter (WM) while the soluble oxalate ranged from 147.8 to 339.7 mg/100 g WM...
January 1, 2017: Foods (Basel, Switzerland)
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