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https://www.readbyqxmd.com/read/28637094/acclimation-responses-to-high-light-by-guazuma-ulmifolia-lam-malvaceae-leaves-at-different-stages-of-development
#1
Anderson Kikuchi Calzavara, Juliana Silva Rocha, Geovana Lourenço, Karina Sanada, Cristiano Medri, Edmilson Bianchini, José Antonio Pimenta, Renata Stolf-Moreira, Halley Caixeta Oliveira
The recomposition of deforested environments requires the prior acclimation of seedlings to full sun in nurseries. Seedlings can overcome excessive light either through the acclimation of pre-existing fully expanded leaves or through the development of new leaves that are acclimated to the new light environment. Here, we compared the acclimation capacity of mature (MatL, fully expanded at the time of transfer) and newly expanded leaves (NewL, expanded after the light shift) of Guazuma ulmifolia Lam. (Malvaceae) seedlings to high light...
June 21, 2017: Plant Biology
https://www.readbyqxmd.com/read/28637044/depressed-patients-hospitalized-in-southeast-facing-rooms-are-discharged-earlier-than-patients-in-northwest-facing-rooms
#2
Krzysztof Gbyl, Helle Østergaard Madsen, Signe Dunker Svendsen, Paul Michael Petersen, Ida Hageman, Carlo Volf, Klaus Martiny
BACKGROUND AND AIM: Improvement in patients admitted to inpatient wards with severe depression is slow, and such patients are often discharged with residual symptoms which put them at risk for relapse. New treatments that can speed up recovery are highly desired. This naturalistic follow-up study in a specialized affective disorders unit investigated the impact of daylight on the length of hospital stay and improvement of depression. METHODS: For a period of 1 year, we collected data on sociodemographics, length of stay, vitamin D, and depression severity for patients in an inpatient affective disorders unit...
June 22, 2017: Neuropsychobiology
https://www.readbyqxmd.com/read/28633102/an-integrated-assessment-of-ceftazidime-and-photoproducts-on-the-feeding-behavior-of-rotifers-from-exposure-to-post-exposure
#3
Yanhua Liu, Yaqi Wang, Jie Zhang, Liu Sun, Anqi Zhang, Oscar Lopez Torres, Ruixin Guo, Jianqiu Chen
Compared to traditional toxicological studies, which depict the dose-effect of contaminants themselves on organisms at the given time, the exposure and post-exposure impacts of antibiotic ceftazidime and its photoproducts are carried out to systematically evaluate the environmental risk fate of ceftazidime in aquatic environments. For the exposure process, the promotion effect of ceftazidime on the feeding behavior of the rotifers decreased when the target compound was irradiated by sunlight, and the promotion effect was converted into inhibition effect, which indicated that the highest toxicity of ceftazidime on the feeding behavior of the rotifers was found after UV-B irradiation...
June 17, 2017: Ecotoxicology and Environmental Safety
https://www.readbyqxmd.com/read/28631780/tuning-the-photocatalytic-activity-of-bismuth-wolframate-towards-selective-oxidations-for-the-biorefinery-driven-by-solar-light
#4
Rosaria Ciriminna, Riccardo Delisi, Francesco Parrino, Leonardo Palmisano, Mario Pagliaro
The sol-gel entrapment of nanostructured Bi2WO6 enhances the activity and the selectivity of the short-gap semiconductor in the sunlight-driven photo-oxidation of trans-ferulic and trans-cinnamic acid dissolved in water with air as the primary oxidant. Valuable products such as vanillin, benzaldehyde, benzoic acid and vanillic acid are obtained. This provides the proof of concept that photocatalysis could be a promising technology in tomorrow's solar biorefineries.
June 20, 2017: Chemical Communications: Chem Comm
https://www.readbyqxmd.com/read/28631303/photophobia-and-seasonal-variation-of-migraine-in-a-subarctic-population
#5
Svein I Bekkelund, Kai I Müller, Aleksander Wilhelmsen, Karl B Alstadhaug
OBJECTIVE: To investigate associations between photophobia and seasonal variation of migraine. METHODS: In this cross-sectional study, migraineurs consecutively recruited were referred to a specialist center located above the Arctic Circle at 68-71 degrees North during a 2.5-year period. Data were obtained through a structured interview. RESULTS: In total, 302 migraineurs with a mean (±SD) age of 35.5 (±12.6) years were included. Patients who reported seasonal variation of migraine (n = 90; 29...
June 19, 2017: Headache
https://www.readbyqxmd.com/read/28627057/vitamin-d-metabolism-in-growing-pigs-influence-of-uvb-irradiation-and-dietary-vitamin-d-supply-on-calcium-homeostasis-its-regulation-and-bone-metabolism
#6
E Kolp, M R Wilkens, W Pendl, B Eichenberger, A Liesegang
The aim of this study was to prove whether pigs are able to synthesize vitamin D (vitD) in the skin and to investigate the influence of ultraviolet irradiation (UVB) on vitD status and calcium (Ca) homeostasis of growing pigs. Thirty-two 11-week-old pigs were kept without access to sunlight and divided into four groups receiving the following treatment in a 2 × 2 factorial design: (i) UVB irradiation or not and (ii) vitD in feed or not. Blood, urine and faeces were sampled every third week. In serum, vitD metabolites, Ca, phosphorus (P), magnesium (Mg) and bone markers were analysed...
June 2017: Journal of Animal Physiology and Animal Nutrition
https://www.readbyqxmd.com/read/28623345/fabrication-of-modified-hydrogenated-castor-oil-gptms-zno-composites-and-effect-on-uv-resistance-of-leather
#7
Jianzhong Ma, Limin Duan, Juan Lu, Bin Lyu, Dangge Gao, Xionghu Wu
Leather products are made from the natural skin collagen fibers. It is vulnerable to the environmental factor such as solar ultraviolet irradiation in the using process. Therefore anti-UV performance is a very important quality, particularly for chrome-free leather. ZnO is a well-known UV absorber commonly used in the cosmetic industry. We have investigated its potential to increase the anti-UV performance of chrome-free leather. Modified hydrogenated castor oil/GPTMS-ZnO (MHCO/ GPTMS-ZnO) composites were prepared using spherical ZnO nanoparticles, hydrogenated castor oil, maleic anhydride and sodium bisulfite...
June 16, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28622704/evaluation-of-quality-of-life-physical-activity-and-nutritional-profile-of-postmenopausal-women-with-and-without-vitamin-d-deficiency
#8
Adriele Delchiaro, Flávia de Jesus Oliveira, Camila Lopez Bonacordi, Bruna Libanori Chedid, Giuliana Annicchino, Cesar Eduardo Fernandes, Rodolfo Strufaldi, Luciano M Pompei, Marcelo Luis Steiner
Introduction Vitamin D deficiency is associated with various diseases. Prevalent in Brazil, it can result from inadequate lifestyle habits. Objective To demonstrate that postmenopausal women with vitamin D deficiency have worse quality of health, expressed as worse quality of life, lower levels of physical activity, and worse nutritional profile. Methods Postmenopausal women answered questionnaires about physical activity and quality of life, provided a 24-hour food record, and had serum vitamin D levels measured...
June 16, 2017: Revista Brasileira de Ginecologia e Obstetrícia
https://www.readbyqxmd.com/read/28620447/photoelectrochemistry-by-design-tailoring-the-nanoscale-structure-of-pt-nio-composites-leads-to-enhanced-photoelectrochemical-hydrogen-evolution-performance
#9
András Sápi, András Varga, Gergely F Samu, Dorina Dobó, Koppány L Juhász, Bettina Takács, Erika Varga, Ákos Kukovecz, Zoltán Kónya, Csaba Janáky
Photoelectrochemical hydrogen evolution is a promising avenue to store the energy of sunlight in the form of chemical bonds. The recent rapid development of new synthetic approaches enables the nanoscale engineering of semiconductor photoelectrodes, thus tailoring their physicochemical properties toward efficient H2 formation. In this work, we carried out the parallel optimization of the morphological features of the semiconductor light absorber (NiO) and the cocatalyst (Pt). While nanoporous NiO films were obtained by electrochemical anodization, the monodisperse Pt nanoparticles were synthesized using wet chemical methods...
June 8, 2017: Journal of Physical Chemistry. C, Nanomaterials and Interfaces
https://www.readbyqxmd.com/read/28620422/special-considerations-for-vitamin-d-in-the-south-asian-population-in-the-uk
#10
REVIEW
Nicola M Lowe, Issak Bhojani
The human requirement for vitamin D is achieved primarily through the synthesis of this prehormone in the skin during exposure to ultraviolet B (UVB) radiation, with only a minor contribution from the diet, year round. Achieving optimal vitamin D status is therefore largely dependent upon adequate exposure of the skin to sunlight, however, the length of exposure required varies with latitude and season, and is also dependent upon skin pigmentation, with darker skin requiring greater exposure than fair skin due to the protective effects of melanin against UVB radiation...
June 2017: Therapeutic Advances in Musculoskeletal Disease
https://www.readbyqxmd.com/read/28620394/vitamin-d-counteracts-mycobacterium-tuberculosis-induced-cathelicidin-downregulation-in-dendritic-cells-and-allows-th1-differentiation-and-ifn%C3%AE-secretion
#11
Anna K O Rode, Martin Kongsbak, Marie M Hansen, Daniel Villalba Lopez, Trine B Levring, Anders Woetmann, Niels Ødum, Charlotte M Bonefeld, Carsten Geisler
Tuberculosis (TB) presents a serious health problem with approximately one-third of the world's population infected with Mycobacterium tuberculosis in a latent state. Experience from the pre-antibiotic era and more recent clinical studies have established a beneficial role of sunlight and vitamin D in patients with TB. At the same time, experimental data have shown that Th1 cells through production of IFNγ are crucial for cathelicidin release by macrophages, bacterial killing, and containment of M. tuberculosis in granulomas...
2017: Frontiers in Immunology
https://www.readbyqxmd.com/read/28617289/study-on-method-and-mechanism-of-deep-well-circulation-for-the-growth-control-of-microcystis-in-aquaculture-pond
#12
Haibing Cong, Feng Sun, Jun Wu, Yue Zhou, Qi Yan, Ao Ren, Hu Xu
In order to control the growth of Microcystis in aquaculture ponds and reduce its adverse effect on water quality and aquaculture, a production-scale experiment of deep well circulation treatment was carried out in an aquaculture pond with water surface area of 63,000 m(2) and water depth of 1.6-2.0 m. Compared with the control pond, the experiment pond had better water quality as indicated by 64.2% reduction in chlorophyll a, and 81.1% reduction in algal cells. The chemical oxygen demand, total nitrogen, and total phosphorus concentration were reduced by 55...
June 2017: Water Science and Technology: a Journal of the International Association on Water Pollution Research
https://www.readbyqxmd.com/read/28615261/increased-vitamin-d-intake-differentiated-according-to-skin-color-is-needed-to-meet-requirements-in-young-swedish-children-during-winter-a-double-blind-randomized-clinical-trial
#13
Inger Öhlund, Torbjörn Lind, Olle Hernell, Sven-Arne Silfverdal, Pia Karlsland Åkeson
Background: Dark skin and low exposure to sunlight increase the risk of vitamin D insufficiency in children.Objective: The aim of the study was to evaluate the amount of vitamin D needed to ascertain that most children >4 y of age attain sufficient serum 25-hydroxyvitamin D [S-25(OH)D; i.e., ≥50 nmol/L] during winter regardless of latitude and skin color.Design: In a longitudinal, double-blind, randomized, food-based intervention study, 5- to 7-y-old children from northern (63°N) and southern (55°N) Sweden with fair (n = 108) and dark (n = 98) skin were included...
June 14, 2017: American Journal of Clinical Nutrition
https://www.readbyqxmd.com/read/28614493/bipolar-disorders-is-there-an-influence-of-seasonality-or-photoperiod
#14
Andrea Aguglia, Antonio Borsotti, Giuseppe Maina
Objective: To increase understanding of the influence of photoperiod variation in patients with bipolar disorders. Methods: We followed a sample of Italian bipolar patients over a period of 24 months, focusing on inpatients. All patients admitted to the Psychiatric Inpatient Unit of San Luigi Gonzaga Hospital in Orbassano (Turin, Italy) between September 1, 2013 and August 31, 2015 were recruited. Sociodemographic and clinical data were collected. Results: Seven hundred and thirty patients were included...
June 12, 2017: Revista Brasileira de Psiquiatria
https://www.readbyqxmd.com/read/28612494/enhanced-interfacial-charge-transfer-on-wo3-photoanode-by-molecular-iridium-catalyst
#15
Haili Tong, Yi Jiang, Qian Zhang, Jialing Li, Wenchao Jiang, Donghui Zhang, Na Li, Lixin Xia
The rational design of active photoanodes for photoelectrochemical (PEC) water splitting is crucial for future applications in sustainable energy conversion. A combination of catalysts with photoelectrodes is generally required to improve surface kinetics and suppress surface recombination. In this study, we present an iridium complex (Ir-PO3H2) modified WO3 photoanode (WO3+Ir-PO3H2) for PEC water oxidation. When the Ir-based molecular catalyst (Ir-PO3H2) is anchored to a WO3 electrode, the photoanode shows a significant improvement both in photocurrent and faradaic efficiency compared to bare WO3...
June 14, 2017: ChemSusChem
https://www.readbyqxmd.com/read/28612464/recent-advances-in-bismuth-based-nanomaterials-for-photoelectrochemical-water-splitting
#16
Swhetha S M Bhat, Ho Won Jang
In recent years bismuth based nanomaterials are drawing considerable interest as potential candidates for photoelectrochemical (PEC) water splitting due to their narrow band gap, nontoxicity and low cost. The unique electronic structure with well dispersed valance band comprising of Bi 6s and O 2p orbital in the bismuth based materials offers suitable band gap to harvest visible light. This review presents the significant advancements in exploiting bismuth based materials for solar water splitting. An overview of different strategies employed and new ideas adopted to improve the PEC performance are discussed for these materials...
June 13, 2017: ChemSusChem
https://www.readbyqxmd.com/read/28612446/interconnected-ternary-min2s4-m-fe-co-ni-thiospinels-nanosheets-array-a-type-of-efficient-pt-free-counter-electrodes-for-the-dye-sensitized-solar-cells
#17
Wenjing Hou, Yaoming Xiao, Gaoyi Han
The ternary iron group thiospinels of metal diindium sulfides (MIn2S4, M = Fe, Co, Ni) with the vertically aligned nanosheets array structure are fabricated through in situ solvothermal method on F-doped tin oxide substrates, which are employed as one type of platinum (Pt) free counter electrodes (CEs) in the structure-dependent dye-sensitized solar cells (DSSCs). DSSC assembled with ternary CoIn2S4 CE achieves an photoelectric conversion efficiency (PCE) of 8.83%, outperforming than that of FeIn2S4 (7.18%) and NiIn2S4 (8...
June 13, 2017: Angewandte Chemie
https://www.readbyqxmd.com/read/28607894/impact-of-co-existing-vascular-headache-on-symptom-relief-after-endoscopic-sinus-surgery
#18
Shilpa Chandrashekarappa, Sandeep Shetty, T Shivaram Shetty, Amjad Khan, Parijat Joshi
Vascular headache and chronic rhinosinusitis (CRS) are diseases that share similar symptoms and demographics, including headache, facial pain and nasal symptoms. Contribution of chronic sinusitis as a cause of chronic headache is controversial, as there are scarce studies to know incidence of vascular headache in patients with CRS. To evaluate incidence of vascular headache in patients with CRS. Using descriptive study design, group of 100 patients with symptoms of CRS with headache were included in study. Patients underwent surgical management and 3% managed medically...
June 2017: Indian Journal of Otolaryngology and Head and Neck Surgery
https://www.readbyqxmd.com/read/28604867/how-seaweeds-release-the-excess-energy-from-sunlight-to-surrounding-sea-water
#19
Kenichi Koizumi, Makoto Hatakeyama, Mauro Boero, Katsuyuki Nobusada, Hirokazu Hori, Taku Misonou, Shinichiro Nakamura
We report an atomistic insight into the mechanism regulating the energy released by a porphyra-334 molecule, the ubiquitous photosensitive component of marine algae, in a liquid water environment upon an electron excitation. To quantify this rapidly occurring process, we resort to the Fourier analysis of the mass-weighted auto-correlation function, providing evidence for a remarkable dynamic change in the number of hydrogen bonds among water molecules and between the porphyra-334 and its surrounding hydrating water...
June 21, 2017: Physical Chemistry Chemical Physics: PCCP
https://www.readbyqxmd.com/read/28601016/effects-of-oil-dispersants-on-photodegradation-of-parent-and-alkylated-anthracene-in-seawater
#20
Zhengqing Cai, Wen Liu, Jie Fu, S E O'Reilly, Dongye Zhao
This study investigated effects of three model oil dispersants on photodegradation of two model PAHs (anthracene and 9,10-dimethyanthracene (9,10-DMA)) under simulated sunlight. All three dispersants, i.e. Corexit EC9500A, Corexit EC9527A and SPC 1000, promoted the photolysis rate of 9,10-DMA, following the order of Corexit EC9500A > Corexit EC9527A > SPC 1000. The photodegradation rate was well interpreted by a two-stage, first-order kinetic law with a faster initial photolysis rate in the presence of the dispersants...
June 7, 2017: Environmental Pollution
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