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https://www.readbyqxmd.com/read/28444473/contrasting-effects-of-engineered-carbon-nanotubes-on-plants-a-review
#1
Meththika Vithanage, Mihiri Seneviratne, Mahtab Ahmad, Binoy Sarkar, Yong Sik Ok
Rapid surge of interest for carbon nanotube (CNT) in the last decade has made it an imperative member of nanomaterial family. Because of the distinctive physicochemical properties, CNTs are widely used in a number of scientific applications including plant sciences. This review mainly describes the role of CNT in plant sciences. Contradictory effects of CNT on plants physiology are reported. CNT can act as plant growth inducer causing enhanced plant dry biomass and root/shoot lengths. At the same time, CNT can cause negative effects on plants by forming reactive oxygen species in plant tissues, consequently leading to cell death...
April 25, 2017: Environmental Geochemistry and Health
https://www.readbyqxmd.com/read/28440960/is-humidified-better-than-non-humidified-low-flow-oxygen-therapy-a-systematic-review-and-meta-analysis
#2
REVIEW
Zunjia Wen, Wenting Wang, Haiying Zhang, Chao Wu, Jianping Ding, Meifen Shen
AIMS: To determine the effects of low-flow oxygen therapy with humidified or non-humidified oxygen in adult patients. BACKGROUND: Although non-humidified oxygen in low-flow oxygen therapy is recommended by many guidelines, humidifying oxygen regardless of oxygen flow has been routinely performed in China and Japan and further studies are needed to evaluate the evidence. DESIGN: A systematic review and meta-analysis that comply with the recommendations of the Cochrane Collaboration were conducted...
April 25, 2017: Journal of Advanced Nursing
https://www.readbyqxmd.com/read/28440376/occurrence-of-perchlorate-in-groundwater-paired-farmland-soil-lettuce-and-rhizosphere-soil-from-chengdu-china
#3
Yulu Tang, Bifeng Zhong, Bing Qu, Shujin Feng, Sanglan Ding, Shijun Su, Zhi Li, Zhiwei Gan
A total of 28 groundwater, paired farmland soil, lettuce, and its rhizosphere soil samples were collected from Chengdu, China to detect perchlorate levels and to evaluate the relationships of perchlorate concentrations among these matrices. The perchlorate concentrations in the groundwater, farmland soil, lettuce, and rhizosphere soil samples ranged from below detection limit to 60.2 μg L(-1), from below detection limit to 249 μg kg(-1) dry weight (dw), from 2.07 to 1010 μg kg(-1) wet weight, and from below detection limit to 314 μg kg(-1) dw, respectively...
April 25, 2017: Environmental Science. Processes & Impacts
https://www.readbyqxmd.com/read/28439076/practice-makes-perfect-self-reported-adherence-a-positive-marker-of-inhaler-technique-maintenance
#4
Elizabeth Azzi, Pamela Srour, Carol Armour, Cynthia Rand, Sinthia Bosnic-Anticevich
Poor inhaler technique and non-adherence to treatment are major problems in the management of asthma. Patients can be taught how to achieve good inhaler technique, however maintenance remains problematic, with 50% of patients unable to demonstrate correct technique. The aim of this study was to determine the clinical, patient-related and/or device-related factors that predict inhaler technique maintenance. Data from a quality-controlled longitudinal community care dataset was utilized. 238 patients using preventer medications where included...
April 24, 2017: NPJ Primary Care Respiratory Medicine
https://www.readbyqxmd.com/read/28434820/interrelationships-of-metal-transfer-factor-under-wastewater-reuse-and-soil-pollution
#5
D Papaioannou, I K Kalavrouziotis, P H Koukoulakis, F Papadopoulos, P Psoma
The transfer of heavy metals under soil pollution wastewater reuse was studied in a Greenhouse experiment using a randomized block design, including 6 treatments of heavy metals mixtures composed of Zn, Mn, Cd, Co, Cu, Cr, Ni, and Pb, where each metal was taking part in the mixture with 0, 10, 20, 30, 40, 50 mg/kg respectively, in four replications. The Beta vulgaris L (beet) was used as a test plant. It was found that the metal transfer factors were statistically significantly related to the: (i) DTPA extractable soil metals, (ii) the soil pollution level as assessed by the pollution indices, (iii) the soil pH, (iv) the beet dry matter yield and (v) the interactions between the heavy metals in the soil...
April 20, 2017: Journal of Environmental Management
https://www.readbyqxmd.com/read/28434720/short-and-longer-term-effects-of-feeding-increased-metwabolizable-protein-with-or-without-an-altered-amino-acid-profile-to-dairy-cows-immediately-postpartum
#6
E G Carder, W P Weiss
The first few weeks after parturition is marked by low, but increasing feed intake and sharply increasing milk production by dairy cows. Because of low intake, the nutrient density of the diet may need to be higher during this period to support increasing milk yields. We hypothesized that feeding higher levels of metabolizable protein (MP) or a protein supplement with rumen-protected lysine and methionine during the immediate postpartum period would increase yields of milk and milk components. Fifty-six Holstein cows (21 primiparous and 35 multiparous) starting at 3 d in milk were used in a randomized block design...
April 20, 2017: Journal of Dairy Science
https://www.readbyqxmd.com/read/28431370/hydrodynamic-influence-on-reservoir-sustainability-in-semi-arid-climate-a-physicochemical-and-environmental-isotopic-study
#7
Rawaa Ammar, Véronique Kazpard, Antoine G El Samrani, Nabil Amacha, Zeinab Saad, Lei Chou
Water scarcity and increasing water demand require the development of water management plans such as establishing artificial lakes and dams. Plans to meet water needs are faced by uprising challenges to improve water quality and to ensure the sustainability of hydro-projects. Environmental isotopes coupled to water physicochemical characteristics were investigated over a biennial cycle to assess both geomorphological and environmental impacts on the water quality of a reservoir situated in an intensively used agricultural watershed under a Mediterranean semi-arid climate...
April 17, 2017: Journal of Environmental Management
https://www.readbyqxmd.com/read/28431195/feeding-behavior-and-activity-budget-of-the-southern-yellow-cheeked-crested-gibbons-nomascus-gabriellae-in-a-lowland-tropical-forest
#8
Thanh H Bach, Jin Chen, Minh D Hoang, Kingsly C Beng, Van T Nguyen
The southern yellow-cheeked crested gibbon (Nomascus gabriellae), an endangered species native to Vietnam and Cambodia, lives exclusively in undisturbed tropical forests and depends primarily on ripe fruit for food. Although this species is highly threatened, its ecology and conservation status remain relatively unknown. In order to understand how this heavily frugivorous primate adapts to the seasonal fluctuation of fruit resources in the forest, we collected feeding behavior and ranging activity data on one group of southern yellow-cheeked crested gibbons in Cat Tien National Park, Vietnam, over 1-year period...
April 21, 2017: American Journal of Primatology
https://www.readbyqxmd.com/read/28430297/stopping-conventional-showering-decreases-pseudomonas-infections-in-left-ventricular-assist-device-patients
#9
Nana Aburjania, Saadia Sherazi, Vakhtang Tchantchaleishvili, Jeffrey D Alexis, Christine M Hay
BACKGROUND: Left ventricular assist device (LVAD) exit-site infections represent a major challenge in the era of modern LVADs. Infections caused by Pseudomonas are particularly difficult to treat due to limited antibiotic susceptibility. We hypothesized that keeping the LVAD exit site dry while bathing could result in reduced incidence of Pseudomonas infections. METHODS: Starting in April 2013, all patients who underwent placement of HeartMate II (HM II) LVAD were instructed not to take conventional showers and to keep the exit site dry while bathing...
April 18, 2017: International Journal of Artificial Organs
https://www.readbyqxmd.com/read/28429388/layered-double-hydroxide-nanosheets-with-multiple-vacancies-obtained-by-dry-exfoliation-as-highly-efficient-oxygen-evolution-electrocatalysts
#10
Yanyong Wang, Yiqiong Zhang, Zhijuan Liu, Chao Xie, Shi Feng, Dongdong Liu, Mingfei Shao, Shuangyin Wang
Layered double hydroxides (LDHs) with two-dimensional lamellar structures show excellent electrocatalytic properties. However, the catalytic activity of LDHs needs to be further improved as the large lateral size and thickness of the bulk material limit the number of exposed active sites. However, the development of efficient strategies to exfoliate bulk LDHs into stable monolayer LDH nanosheets with more exposed active sites is very challenging. On the other hand, the intrinsic activity of monolayer LDH nanosheets can be tuned by surface engineering...
April 21, 2017: Angewandte Chemie
https://www.readbyqxmd.com/read/28428797/silicon-regulates-antioxidant-activities-of-crop-plants-under-abiotic-induced-oxidative-stress-a-review
#11
REVIEW
Yoon-Ha Kim, Abdul L Khan, Muhammad Waqas, In-Jung Lee
Silicon (Si) is the second most abundant element in soil, where its availability to plants can exhilarate to 10% of total dry weight of the plant. Si accumulation/transport occurs in the upward direction, and has been identified in several crop plants. Si application has been known to ameliorate plant growth and development during normal and stressful conditions over past two-decades. During abiotic (salinity, drought, thermal, and heavy metal etc) stress, one of the immediate responses by plant is the generation of reactive oxygen species (ROS), such as singlet oxygen ((1)O2), superoxide ([Formula: see text]), hydrogen peroxide (H2O2), and hydroxyl radicals (OH), which cause severe damage to the cell structure, organelles, and functions...
2017: Frontiers in Plant Science
https://www.readbyqxmd.com/read/28427428/quality-issues-with-malaria-rapid-diagnostic-test-accessories-and-buffer-packaging-findings-from-a-5-country-private-sector-project-in-africa
#12
Steven A Harvey, Sandra Incardona, Nina Martin, Cristina Lussiana, Elizabeth Streat, Stephanie Dolan, Nora Champouillon, Daniel J Kyabayinze, Robert Mugerwa, Grace Nakanwagi, Nancy Njoki, Ratsimandisa Rova, Jane Cunningham
BACKGROUND: Use of antigen-detecting malaria rapid diagnostic tests (RDTs) has increased exponentially over the last decade. WHO's Global Malaria Programme, FIND, and other collaborators have established a quality assurance scheme to guide product selection, lot verification, transport, storage, and training procedures. Recent concerns over the quality of buffer packaging and test accessories suggest a need to include these items in product assessments. This paper describes quality problems with buffer and accessories encountered in a project promoting private sector RDT use in five African countries and suggests steps to avoid or more rapidly identify and resolve such problems...
April 20, 2017: Malaria Journal
https://www.readbyqxmd.com/read/28427352/point-of-sampling-detection-of-zika-virus-within-a-multiplexed-kit-capable-of-detecting-dengue-and-chikungunya
#13
Ozlem Yaren, Barry W Alto, Priyanka V Gangodkar, Shatakshi R Ranade, Kunal N Patil, Kevin M Bradley, Zunyi Yang, Nikhil Phadke, Steven A Benner
BACKGROUND: Zika, dengue, and chikungunya are three mosquito-borne viruses having overlapping transmission vectors. They cause diseases having similar symptoms in human patients, but requiring different immediate management steps. Therefore, rapid (< one hour) discrimination of these three viruses in patient samples and trapped mosquitoes is needed. The need for speed precludes any assay that requires complex up-front sample preparation, such as extraction of nucleic acids from the sample...
April 20, 2017: BMC Infectious Diseases
https://www.readbyqxmd.com/read/28426382/effectiveness-of-hand-washing-on-the-removal-of-iron-oxide-nanoparticles-from-human-skin-ex-vivo
#14
Nastassja A Lewinski, Aurélie Berthet, Lionel Maurizi, Antoine Eisenbeis, Nancy B Hopf
In this study, the effectiveness of washing with soap and water in removing nanoparticles from exposed skin was investigated. Dry, nanoscale hematite (α-Fe2O3) or maghemite (γ-Fe2O3) powder, with primary particle diameters between 20-30 nm, were applied to two samples each of fresh and frozen ex vivo human skin in two independent experiments. The permeation of nanoparticles through skin, and the removal of nanoparticles after washing with soap and water were investigated. Bare iron oxide nanoparticles remained primarily on the surface of the skin, without penetrating beyond the stratum corneum...
April 20, 2017: Journal of Occupational and Environmental Hygiene
https://www.readbyqxmd.com/read/28426175/differences-in-xylem-and-leaf-hydraulic-traits-explain-differences-in-drought-tolerance-among-mature-amazon-rainforest-trees
#15
Thomas L Powell, James K Wheeler, Alex A R de Oliveira, Antonio Carlos Lola da Costa, Scott R Saleska, Patrick Meir, Paul R Moorcroft
Considerable uncertainty surrounds the impacts of anthropogenic climate change on the composition and structure Amazon forests. Two large-scale ecosystem drought experiments in the eastern Brazilian Amazon observed increases in mortality rates among some tree species but not others; and therefore, the physiological traits underpinning these differential demographic responses were investigated. Xylem pressure at 50% conductivity (xylem-P50 ), leaf turgor loss point (TLP), cellular osmotic potential (πo ) and cellular bulk modulus of elasticity (ε), all traits mechanistically linked to drought tolerance, were measured on upper canopy branches and leaves of mature trees from selected species growing at the two drought experiment sites...
April 20, 2017: Global Change Biology
https://www.readbyqxmd.com/read/28425227/primary-sj%C3%A3-gren-s-syndrome-in-patients-with-celiac-disease
#16
Funda Erbasan, Deniz Turgut Çoban, Uğur Karasu, Yeşim Çekin, Bayram Yeşil, Ayhan Hilmi Çekin, Dinç Süren, Mustafa Ender Terzioğlu
BACKGROUND/AIM: Many autoimmune diseases occur concomitantly with celiac disease (CD). We aimed to determine the frequency of Sjögren's syndrome (SS) in CD patients based on SS-specific serology verified by minor labial salivary biopsy. MATERIALS AND METHODS: Eight-two patients with CD were included in the study. After examination for objective evidence of sicca complex, all patients were tested for serological presence of rheumatoid factor (RF) and antinuclear antibodies (ANAs) and for ANA profile...
April 18, 2017: Turkish Journal of Medical Sciences
https://www.readbyqxmd.com/read/28422418/factors-associated-with-mucosal-dryness-in-multiple-regions-and-skin-a-web-based-study-in-women
#17
Kayoko Ito, Kiyoshi Takamatsu, Kaname Nohno, Aki Sugano, Saori Funayama, Kouji Katsura, Noboru Kaneko, Mariko Ogawa, Jukka H Meurman, Makoto Inoue
AIM: We hypothesized that feeling mucosal dryness in one body region and the skin may be associated with dryness in other regions and that there are common background factors for dryness. In an earlier web-based survey, we reported prevalence figures of dry eyes, nose, mouth, skin, and vagina. In the present study, additional analyses were made to investigate the factors associated with dryness in each region, and simultaneous dryness in multiple regions. METHODS: A web-based questionnaire was completed by 310 Japanese women...
April 19, 2017: Journal of Obstetrics and Gynaecology Research
https://www.readbyqxmd.com/read/28421366/two-deletion-variants-of-middle-east-respiratory-syndrome-coronavirus-found-in-a-patient-with-characteristic-symptoms
#18
Qian Xie, Yujuan Cao, Juan Su, Jie Wu, Xianbo Wu, Chengsong Wan, Mingliang He, Changwen Ke, Bao Zhang, Wei Zhao
Significant sequence variation of Middle East respiratory syndrome coronavirus (MERS CoV) has never been detected since it was first reported in 2012. A MERS patient came from Korea to China in late May 2015. The patient was 44 years old and had symptoms including high fever, dry cough with a little phlegm, and shortness of breath, which are roughly consistent with those associated with MERS, and had had close contact with individuals with confirmed cases of MERS.After one month of therapy with antiviral, anti-infection, and immune-enhancing agents, the patient recovered in the hospital and was discharged...
April 18, 2017: Archives of Virology
https://www.readbyqxmd.com/read/28415482/terminal-sterilization-of-equine-derived-decellularized-tendons-for-clinical-use
#19
Alessandro F Pellegata, Marta Bottagisio, Federica Boschetti, Marco Ferroni, Monica Bortolin, Lorenzo Drago, Arianna B Lovati
In the last few years, the demand for tissue substitutes has increased and decellularized matrices has been widely proposed in the medical field to restore severe damages thanks to high biocompatibility and biomechanical properties similar to the native tissues. However, biological grafts represent a potential source of contamination and disease transmission; thus, there is the need to achieve acceptable levels of sterility. Several sterilization methods have been investigated with no consensus on the outcomes in terms of minimizing structural damages and preserving functional features of the decellularized matrix for transplantation in humans...
June 1, 2017: Materials Science & Engineering. C, Materials for Biological Applications
https://www.readbyqxmd.com/read/28413966/the-clinical-problems-of-hypertension-treatment-in-hemodialysis-patients
#20
Charalampos N Loutradis, Costas Tsioufis, Pantelis A Sarafidis
Hypertension (HT) is present in more than 80% of patients undergoing hemodialysis (HD). Elevated blood pressure (BP) in hemodialysis patients is associated with cardiovascular events and mortality only when BP is recorded with home or ambulatory monitoring, since pre- and post-dialysis measurements are not valid estimates of BP levels during the inter-dialytic interval. Sodium and water overload is the most important of several mechanisms involved in HT development in HD. In this context, non-pharmacologic measures to ensure water and sodium balance by achieving patient dry weight and decreasing daily sodium intake, through modification of sodium level in the diet or in dialysis dialysate, are fundamental for HT control...
April 14, 2017: Current Vascular Pharmacology
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