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https://www.readbyqxmd.com/read/28516405/characterization-of-dissolved-organic-matter-in-an-urbanized-estuary-located-in-northeastern-brazil
#1
Maria de Lara Palmeira de Macedo Arguelho, José do Patrocínio Hora Alves, Adnívia Santos Costa Monteiro, Carlos Alexandre Borges Garcia
The Sal River estuary, which is located in the state of Sergipe, Northeastern Brazil, stands out as an urban estuary, anthropogenically impacted by untreated and treated wastewater discharge. Synchronous fluorescence spectroscopy and measurement of dissolved organic carbon (DOC) were used for characterization of dissolved organic matter (DOM) in the estuarine water. Dissolved organic carbon concentrations ranged from 7.5 to 19.0 mg L(-1) and, in general, the highest values were recorded during dry season...
June 2017: Environmental Monitoring and Assessment
https://www.readbyqxmd.com/read/28512276/osteoporosis-knowledge-and-related-health-behavior-among-women-in-jazan-region-kingdom-of-saudi-arabia
#2
Ismail A Darout, Abdelwhab Alamir, Sameena Sultana
INTRODUCTION: Osteoporosis is a systemic bone disease that can be prevented to some extent by awareness of its risk factors and related health behavior. The aim of this study was to collect information about knowledge and awareness of osteoporosis among women living in Jazan and to describe the type of food habits, sociodemographic characteristics, and other osteoporosis-related health behavior. MATERIALS AND METHODS: Self-administered questionnaires were used for data collection...
May 1, 2017: Journal of Contemporary Dental Practice
https://www.readbyqxmd.com/read/28511536/biomimetic-silica-nanocapsules-for-tunable-sustained-release-and-cargo-protection
#3
Guang-Ze Yang, David Wibowo, Jung-Ho Yun, Lianzhou Wang, Anton Peter J Middelberg, Chun-Xia Zhao
Silica nanocapsules have attracted tremendous interest for encapsulation, protection and controlled release of various cargoes due to their unique hierarchical core-shell structure. However, it remains challenging to synthesize silica nanocapsules having high cargo-loading capacity and cargo-protection capability without compromising process simplicity and biocompatibility properties. Here, we synthesized oil-core silica-shell nanocapsules under environmentally friendly conditions by a novel emulsion and biomimetic dual-templating approach using a dual-functional protein, in lieu of petrochemical surfactants, thus avoiding the necessities for the removal of toxic components...
May 16, 2017: Langmuir: the ACS Journal of Surfaces and Colloids
https://www.readbyqxmd.com/read/28510419/sunlight-promotes-fast-release-of-hazardous-cadmium-from-widely-used-commercial-cadmium-pigment
#4
Huiting Liu, Han Gao, Mingce Long, Heyun Fu, Pedro J J Alvarez, Qilin Li, Shourong Zheng, Xiaolei Qu, Dongqiang Zhu
Cadmium pigments are widely used in the polymer and ceramic industry. Their potential environmental risk is under debate, being the major barrier for appropriate regulation. We show that 83.0 ± 0.2 % of hazardous cadmium ion (Cd2+) was released from the commercial cadmium sulfoselenide pigment (i.e., cadmium red) in aqueous suspension within 24 h under simulated sunlit conditions. This photo-dissolution process also generated sub-20 nm pigment nanoparticles. Cd2+ release is attributed to the reactions between photogenerated holes and the pigment lattices...
May 16, 2017: Environmental Science & Technology
https://www.readbyqxmd.com/read/28506720/sunlight-activated-near-infrared-phosphorescence-as-a-viable-means-of-latent-fingermark-visualisation
#5
Roberto S P King, Daniel A Skros
The chromium-doped zinc gallogermanate, Zn3Ga2Ge2O10:0.5%Cr(3+), was prepared and modified for use as a near-infrared (NIR) luminescent fingerprint dusting powder. The optical properties of this material are illustrated and have been shown to offer versatility and promise in terms of overcoming troublesome backgrounds during latent fingermark examination and imaging. The highly fluorescent NIR emission of the powder allows inherently fluorescent and patterned substrate backgrounds to be mitigated, whilst the phosphorescent nature of the material allows all conceivable background interference to be removed, whilst also constituting the first reported use of a NIR phosphor for latent fingermark enhancement and imaging...
April 26, 2017: Forensic Science International
https://www.readbyqxmd.com/read/28500411/a-hairy-leaf-gene-blanket-leaf-of-wild-oryza-nivara-increases-photosynthetic-water-use-efficiency-in-rice
#6
Norimitsu Hamaoka, Hideshi Yasui, Yoshiyuki Yamagata, Yoko Inoue, Naruto Furuya, Takuya Araki, Osamu Ueno, Atsushi Yoshimura
BACKGROUND: High water use efficiency is essential to water-saving cropping. Morphological traits that affect photosynthetic water use efficiency are not well known. We examined whether leaf hairiness improves photosynthetic water use efficiency in rice. RESULTS: A chromosome segment introgression line (IL-hairy) of wild Oryza nivara (Acc. IRGC105715) with the genetic background of Oryza sativa cultivar 'IR24' had high leaf pubescence (hair). The leaf hairs developed along small vascular bundles...
December 2017: Rice
https://www.readbyqxmd.com/read/28500276/while-reinforcing-cell-cycle-arrest-rapamycin-and-torins-suppress-senescence-in-uva-irradiated-fibroblasts
#7
Olga V Leontieva, Mikhail V Blagosklonny
Sunlight predisposes to skin cancer and melanomas. Ultraviolet A (UVA), a long wave component of sunlight, can reach dermal fibroblasts. Here we studied UVA-induced senescence in human fibroblasts in vitro. It is known that senescence occurs, when cell cycle is arrested, but mTOR is still active, thus converting arrest to senescence (geroconversion). We showed that, while arresting cell cycle, UVA did not inhibit mTOR, enabling geroconversion. In UVA-treated cells, mTOR remained fully active. Rapamycin and Torins 1/ 2 prevented UVA-induced senescent phenotype, although they further re-enforced cell cycle arrest...
May 11, 2017: Oncotarget
https://www.readbyqxmd.com/read/28498129/photodegradation-of-diclofenac-in-aqueous-solution-by-simulated-sunlight-irradiation-kinetics-thermodynamics-and-pathways
#8
N Zhang, J M Li, G G Liu, X L Chen, K Jiang
Diclofenac (DCF) is one of the most frequently detected pharmaceuticals in various water samples. This paper studied the effects of aquatic environmental factors (pH, temperature and dissolved organic matter) on photodegradation of DCF under simulated sunlight. The results demonstrate that degradation pathways proceed via pseudo first-order kinetics in all cases and the photodegradation of DCF by simulated sunlight. Thermodynamic study indicated that the photodegradation course is spontaneous, exothermic and irreversible...
May 2017: Water Science and Technology: a Journal of the International Association on Water Pollution Research
https://www.readbyqxmd.com/read/28497170/high-systemic-and-testicular-thermolytic-efficiency-during-heat-tolerance-test-reflects-better-semen-quality-in-rams-of-tropical-breeds
#9
Priscila Reis Kahwage, Sérgio Novita Esteves, Manuel Antônio Chagas Jacinto, Waldomiro Barioni Junior, José Ricardo Macedo Pezzopane, Messy Hannear de Andrade Pantoja, Cristian Bosi, Maria Carolina Villani Miguel, Kaue Mahlmeister, Alexandre Rossetto Garcia
This study aimed to assess the capacity of Morada Nova (MN) and Santa Inês (SIN) rams to maintain body and testicular homeothermy under thermal challenge. For 5 days in the summer, 16 males (SIN = 7 and MN = 9) underwent a heat tolerance test, i.e., period 1-animals maintained in the shade (11 to 12 h); period 2-animals exposed to sunlight (12 to 13 h); and period 3-animals returned to the shade (13 to 14 h). The respiratory rate, heart rate, rectal temperature, and infrared surface temperatures (IRT) of the trunk, back, eyeball, and testicles were assessed in each period...
May 11, 2017: International Journal of Biometeorology
https://www.readbyqxmd.com/read/28496120/band-gap-engineering-of-multi-junction-solar-cells-effects-of-series-resistances-and-solar-concentration
#10
Joya Zeitouny, Eugene A Katz, Alain Dollet, Alexis Vossier
Multi-junction (MJ) solar cells are one of the most promising technologies achieving high sunlight to electricity conversion efficiency. Resistive losses constitute one of the main underlying mechanisms limiting their efficiency under high illumination. In this paper, we study, by numerical modeling, the extent to which a fine-tuning of the different electronic gaps involved in MJ stacks may mitigate the detrimental effects of series resistance losses for concentration-dependent and independent series resistances...
May 11, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28494168/uveal-melanoma-risk-factors-a-systematic-review-of-meta-analyses
#11
Taylor Nayman, Cristina Bostan, Patrick Logan, Miguel N Burnier
PURPOSE: There is currently no clinical risk-assessment tool allowing identification of patients at risk for developing uveal melanoma (UM) who might benefit from regular screening. As a first step toward the elaboration of such a tool, we systematically reviewed UM risk factors already established by meta-analysis. METHODS: Two reviewers independently screened Pubmed, Medline, Embase, and Web of Science from their respective inception dates until July 2016 using a combination of keywords and MeSH terms...
May 11, 2017: Current Eye Research
https://www.readbyqxmd.com/read/28492630/one-step-large-scale-highly-active-g-c3n4-nanosheets-for-efficient-sunlight-driven-photocatalytic-hydrogen-production
#12
Waheed Iqbal, Bocheng Qiu, Juying Lei, Lingzhi Wang, Jinlong Zhang, Masakazu Anpo
The development of highly active, cost-effective, environmentally friendly and stable g-C3N4 based photocatalysts for H2 evolution is one of the most anticipated potential pathways for future hydrogen utilization. Herein, a facile gaseous bubble template approach was designed to prepare large-scale thin g-C3N4 nanosheets (g-C3N4 NSs) using melamine and ammonium sulphate as the bubble template. Through distinctive structural improvements for a large bandgap, excellent electron mobility, prolonged lifetime of the photogenerated charge carriers and a high specific surface area with highly accessible potential reaction sites, the as-synthesized g-C3N4 NSs demonstrated a high photocatalytic hydrogen evolution rate of 9871 μmol h(-1) g(-1) and efficient photocatalytic degradation of Rhodamine B (RhB) and phenol under simulated solar light irradiation...
May 11, 2017: Dalton Transactions: An International Journal of Inorganic Chemistry
https://www.readbyqxmd.com/read/28486652/swabbing-prairie-dog-burrows-for-fleas-that-transmit-yersinia-pestis-influences-on-efficiency
#13
David A Eads
Scientists and health-care professionals sometimes use a swabbing technique to collect fleas from rodent burrows, and later test the fleas for Yersinia pestis, the causative agent of plague. Detection of Y. pestis is enhanced when large pools of fleas are available. The following study investigated factors that might affect the rate at which fleas are collected from burrows in colonies of black-tailed prairie dogs (Cynomys ludovicianus). Data were collected from 13 colonies in New Mexico during 0600-1000 hours, June-August 2010-2011...
May 9, 2017: Journal of Medical Entomology
https://www.readbyqxmd.com/read/28486474/vitamin-d-levels-and-susceptibility-to-asthma-elevated-immunoglobulin-e-levels-and-atopic-dermatitis-a-mendelian-randomization-study
#14
Despoina Manousaki, Lavinia Paternoster, Marie Standl, Miriam F Moffatt, Martin Farrall, Emmanuelle Bouzigon, David P Strachan, Florence Demenais, Mark Lathrop, William O C M Cookson, J Brent Richards
BACKGROUND: Low circulating vitamin D levels have been associated with risk of asthma, atopic dermatitis, and elevated total immunoglobulin E (IgE). These epidemiological associations, if true, would have public health importance, since vitamin D insufficiency is common and correctable. METHODS AND FINDINGS: We aimed to test whether genetically lowered vitamin D levels were associated with risk of asthma, atopic dermatitis, or elevated serum IgE levels, using Mendelian randomization (MR) methodology to control bias owing to confounding and reverse causation...
May 2017: PLoS Medicine
https://www.readbyqxmd.com/read/28486144/impacts-of-uvb-radiation-on-food-consumption-of-forest-specialist-tadpoles
#15
James Eduardo Lago Londero, Caroline Peripolli Dos Santos, Ana Lúcia Anversa Segatto, André Passaglia Schuch
Solar ultraviolet radiation B (UVB) is an important environmental stressor for amphibian populations due to its genotoxicity, especially in early developmental stages. Nonetheless, there is an absence of works focused on the UVB effects on tadpoles' food consumption efficiency. In this work, we investigated the effects of the exposure to a low environmental-simulated dose of UVB radiation on food consumption of tadpoles of the forest specialist Hypsiboas curupi [Hylidae, Anura] species. After UVB treatment tadpoles were divided and exposed to a visible light source or kept in the dark, in order to indirectly evaluate the efficiency of DNA repair performed by photolyases and nucleotide excision repair (NER), respectively...
May 6, 2017: Ecotoxicology and Environmental Safety
https://www.readbyqxmd.com/read/28483188/agnihotra-yajna-a-prototype-of-south-asian-traditional-medical-knowledge
#16
Rahul Raveendran Nair
This study conceptualizes the principle of agnihotra yajna. The perusal of ancient and modern literature reveals that the functioning of the human body is impossible without maintaining an energetic continuum driven by sunlight. The seven major chakras existing over the spinal cord help to maintain this energetic continuum. Agnihotra yajna is proposed to balance the chakra system as a whole by minimizing entropy. Offerings of natural elements to fire lit in a copper pyramid during agnihotra liberate various volatile compounds having potent pharmacological actions...
April 2017: Journal of Acupuncture and Meridian Studies
https://www.readbyqxmd.com/read/28482566/a-biocompatible-and-magnetic-nanocarrier-with-a-safe-uv-initiated-docetaxel-release-and-cancer-secretion-removal-properties-increases-therapeutic-potential-for-skin-cancer
#17
Fei Kong, Xiao Huang, Danyang Yue, Jun Pan
Cancer is a leading fatal disease worldwide. To increase its therapeutic efficiency, more effective with less side effect and patient acceptable administration approach is expected. Moreover, modification of tumor microenvironment is proved to be operative recently. In this paper, a nanocarrier named LDEDDS was developed for intelligent tropical administration of skin cancer, along with removal of hydrophobic cancerous secretion to change tumor microenvironment. It was made by coating of amphipathic polymer P(BA-co-HBA) on docetaxel (TXT, a model hydrophobic anticancer drug) loaded Fe3O4@ZnO...
July 1, 2017: Materials Science & Engineering. C, Materials for Biological Applications
https://www.readbyqxmd.com/read/28481114/photochemical-synthesis-of-oligomeric-amphiphiles-from-alkyl-oxoacids-in-aqueous-environments
#18
Rebecca J Rapf, Russell J Perkins, Haishen Yang, Garret M Miyake, Barry K Carpenter, Veronica Vaida
The aqueous phase photochemistry of a series of amphiphilic α-keto acids with differing linear alkyl chain lengths was investigated, demonstrating the ability of sunlight-initiated reactions to build molecular complexity under environmentally relevant conditions. We show that the photochemical reaction mechanisms for α-keto acids in aqueous solution are robust and generalizable across alkyl chain lengths. The organic radicals generated during photolysis are indiscriminate, leading to a large mixture of photoproducts that are observed using high-resolution electrospray ionization mass spectrometry, but these products are identifiable following literature photochemical mechanisms...
May 16, 2017: Journal of the American Chemical Society
https://www.readbyqxmd.com/read/28478931/sun-exposure-and-skin-cancer-and-the-puzzle-of-cutaneous-melanoma-a-perspective-on-fears-et-al-mathematical-models-of-age-and-ultraviolet-effects-on-the-incidence-of-skin-cancer-among-whites-in-the-united-states-american-journal-of-epidemiology-1977-105-420
#19
REVIEW
Bruce K Armstrong, Anne E Cust
Sunlight has been known as an important cause of skin cancer since around the turn of the 20th Century. A 1977 landmark paper of US scientists Fears, Scotto, and Schneiderman advanced a novel hypothesis whereby cutaneous melanoma was primarily caused by intermittent sun exposure (i.e. periodic, brief episodes of exposure to high-intensity ultraviolet radiation) while the keratinocyte cancers, squamous cell carcinoma and basal cell carcinoma, were primarily caused by progressive accumulation of sun exposure...
May 3, 2017: Cancer Epidemiology
https://www.readbyqxmd.com/read/28477002/biosynthesis-of-silver-nanoparticles-using-artemisia-annua-callus-for-inhibiting-stem-end-bacteria-in-cut-carnation-flowers
#20
Qian Hua Xia, Li Ping Zheng, Pei Fei Zhao, Jian Wen Wang
A biological method for synthesising silver nanoparticles (AgNPs) was developed using the callus extracts from Artemisia annua L. under sunlight at 25,000 lx. The AgNPs were characterised using transmission electron microscopy, atomic force microscope, X-ray diffraction and Fourier transform infrared spectroscopy. The AgNPs were mostly spherical with the size of 2.1 to 45.2 nm (average 10.9 nm). Pulse treatments of AgNPs at 125, 250 and 500 mg/l for 1 h extended vase life of cut carnation (Dianthus caryophyllus cv...
March 2017: IET Nanobiotechnology
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