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https://www.readbyqxmd.com/read/29475182/a-comprehensive-study-on-the-photocatalytic-activity-of-coupled-copper-oxide-cadmium-sulfide-nanoparticles
#1
Samaneh Senobari, Alireza Nezamzadeh-Ejhieh
Coupled CdS-CuO nanoparticles (NPs) subjected in the photocatalytic degradation of Methylene blue (MB) aqueous solution. The calcination temperature and the crystallite phase of CuO had a significant role on the photocatalytic activity of the coupled system and CuO200/2h -CdS catalyst (containing CuO calcined at 200°C for 2h) showed the best photocatalytic activity. The coupled system showed increased activity with respect to the monocomponent semiconductors. The prepared catalysts characterized by x-ray diffraction (XRD), scanning electron microscope equipped with energy dispersive X-ray (EDX) analyzer, x-ray mapping, Fourier transform infrared (FTIR) spectroscopy, diffuse reflectance spectroscopy (DRS) and electrochemical impedance spectroscopy (EIS) techniques...
February 15, 2018: Spectrochimica Acta. Part A, Molecular and Biomolecular Spectroscopy
https://www.readbyqxmd.com/read/29475135/the-multiplicative-effect-of-combining-alcohol-with-energy-drinks-on-adolescent-gambling
#2
Alessio Vieno, Natale Canale, Roberta Potente, Marco Scalese, Mark D Griffiths, Sabrina Molinaro
PURPOSE: There has been increased concern about the negative effects of adolescents consuming a combination of alcohol mixed with energy drinks (AmED). To date, few studies have focused on AmED use and gambling. The present study analyzed the multiplicative effect of AmED consumption, compared to alcohol alone, on the likelihood of at-risk or problem gambling during adolescence. METHODS: Data from the ESPAD®Italia 2015 study, a cross-sectional survey conducted in a nationally representative sample of students (ages 15 to 19years) were used to examine the association between self-reported AmED use (≥6 times,≥10 times, and ≥20 times during the last month) and self-reported gambling severity...
February 20, 2018: Addictive Behaviors
https://www.readbyqxmd.com/read/29475022/association-between-depressive-symptoms-and-dietary-intake-in-patients-with-type-1-diabetes
#3
Aila J Ahola, Carol Forsblom, Per-Henrik Groop
AIMS: Depressive mood negatively affects self-care practices, and thereby increases the risk of long-term complications. Not much is known about the association between depressive symptoms and dietary intake in patients with type 1 diabetes, a population with high risk of cardiovascular disease. METHODS: Subjects (n=976, 41% men, age 48±14 years) were participants in the Finnish Diabetic Nephropathy Study. Depressive symptomatology was assessed with the Beck Depression Inventory (BDI)...
February 20, 2018: Diabetes Research and Clinical Practice
https://www.readbyqxmd.com/read/29474994/the-association-between-ambulatory-activity-body-composition-and-hip-or-knee-joint-replacement-due-to-osteoarthritis-a-prospective-cohort-study
#4
I P Munugoda, K Wills, F Cicuttini, S E Graves, M Lorimer, G Jones, M L Callisaya, D Aitken
OBJECTIVE: To examine the association between ambulatory activity (AA), body composition measures and hip or knee joint replacement (JR) due to osteoarthritis. DESIGN: At baseline, 1082 community-dwelling older-adults aged 50 - 80 years were studied. AA was measured objectively using pedometer and body composition by dual-energy x-ray absorptiometry. The incidence of primary (first-time) JR was determined by data linkage to the Australian Orthopaedic Association National Joint Replacement Registry...
February 20, 2018: Osteoarthritis and Cartilage
https://www.readbyqxmd.com/read/29474936/adiposity-associated-changes-in-serum-glucose-and-adiponectin-levels-modulate-ovarian-steroidogenesis-during-delayed-embryonic-development-in-the-fruit-bat-cynopterus-sphinx
#5
Anuradha, Amitabh Krishna
The aim of the present study was to evaluate the mechanism by which embryonic development in Cynopterus sphinx is impaired during the period of increased accumulation of white adipose tissue during winter scarcity of food. The change in the mass of white adipose tissue during adipogenesis showed significant positive correlation with the circulating glucose level. But increase in circulating glucose level during the adipogenesis showed negative correlation with circulating progesterone and adiponectin levels...
February 20, 2018: General and Comparative Endocrinology
https://www.readbyqxmd.com/read/29474855/multidimensionality-of-plant-defenses-and-herbivore-niches-implications-for-eco-evolutionary-dynamics
#6
Nicolas Loeuille, Céline Hauzy
Plant defenses are very diverse and often involve contrasted costs and benefits. Quantitative defenses, whose protective effect is dependent on the dose, are effective against a wide range of herbivores, but often divert energy from growth and reproduction. Qualitative defenses often have little allocation costs. However, while deterrent to some herbivores, they often incur costs through other interactions within the community (eg, decrease in pollination or attraction of other enemies). In the present work, we model the evolutionary dynamics of these two types of defenses, as well and the evolutionary dynamics of the herbivore niche...
February 20, 2018: Journal of Theoretical Biology
https://www.readbyqxmd.com/read/29474840/production-of-muconic-acid-in-plants
#7
Aymerick Eudes, Roland Berthomieu, Zhangying Hao, Nanxia Zhao, Veronica Teixeira Benites, Edward E K Baidoo, Dominique Loqué
Muconic acid (MA) is a dicarboxylic acid used for the production of industrially relevant chemicals such as adipic acid, terephthalic acid, and caprolactam. Because the synthesis of these polymer precursors generates toxic intermediates by utilizing petroleum-derived chemicals and corrosive catalysts, the development of alternative strategies for the bio-based production of MA has garnered significant interest. Plants produce organic carbon skeletons by harvesting carbon dioxide and energy from the sun, and therefore represent advantageous hosts for engineered metabolic pathways towards the manufacturing of chemicals...
February 20, 2018: Metabolic Engineering
https://www.readbyqxmd.com/read/29474754/the-mechanism-of-photosystem-ii-inactivation-during-sulphur-deprivation-induced-h-2-production-in-chlamydomonas-reinhardtii
#8
Valéria Nagy, André Vidal-Meireles, Anna Podmaniczki, Klára Szentmihályi, Gábor Rákhely, Laura Zsigmond, László Kovács, Szilvia Z Tóth
Sulphur limitation may restrain cell growth and viability. In the green alga, Chlamydomonas reinhardtii, sulphur limitation may induce H2 production lasting for several days, to be exploited as a renewable energy source. Sulphur limitation causes a large number of physiological changes, including the inactivation of photosystem II (PSII), leading to the establishment of hypoxia, essential for the increase in hydrogenase expression and activity. The inactivation of PSII has been long assumed to be caused by the sulphur-limited turnover of its reaction center protein, PsbA...
February 23, 2018: Plant Journal: for Cell and Molecular Biology
https://www.readbyqxmd.com/read/29474366/cr6-interacting-factor-1-deficiency-promotes-endothelial-inflammation-by-sirt1-downregulation
#9
Shuyu Piao, Jun Wan Lee, Harsha Nagar, Saet-Byel Jung, Sujeong Choi, Seonhee Kim, Ikjun Lee, Sung-Min Kim, Nara Shin, Yu Ran Lee, Sang Do Lee, Jin Bong Park, Kaikobad Irani, Minho Won, Gang Min Hur, Byeong Hwa Jeon, Dong Woon Kim, Cuk-Seong Kim
AIMS: CR6 interacting factor 1 (CRIF1) deficiency impairs mitochondrial oxidative phosphorylation complexes, contributing to increased mitochondrial and cellular reactive oxygen species (ROS) production. CRIF1 downregulation has also been revealed to decrease sirtuin 1 (SIRT1) expression and impair vascular function. Inhibition of SIRT1 disturbs oxidative energy metabolism and stimulates nuclear factor kappa-light-chain-enhancer of activated B cells (NF-κB)-induced inflammation. Therefore, we hypothesized that both CRIF1 deficiency-induced mitochondrial ROS production and SIRT1 reduction play stimulatory roles in vascular inflammation...
2018: PloS One
https://www.readbyqxmd.com/read/29474262/longitudinal-changes-in-body-composition-by-dual-energy-x-ray-absorptiometry-among-perinatally-hiv-infected-and-hiv-uninfected-youth-increased-risk-of-adiposity-among-hiv-infected-female-youth
#10
Tanvi S Sharma, Gabriel Somarriba, Kristopher L Arheart, Daniela Neri, M Sunil Mathew, Patricia L Graham, Gwendolyn B Scott, Tracie L Miller
BACKGROUND: Combination antiretroviral therapy (cART) has allowed youth with perinatal HIV infection (PHIV+) to live into adulthood, but many youth may experience metabolic and body composition changes that predispose to greater cardiovascular disease (CVD) risk. This longitudinal study evaluated changes in body composition measured by dual x-ray absorptiometry (DXA) in a cohort of PHIV+ youth compared to HIV- controls over a 7-year period. METHODS: PHIV+ youth and HIV- controls were prospectively enrolled in a single-site study to assess nutrition and CVD risk...
February 22, 2018: Pediatric Infectious Disease Journal
https://www.readbyqxmd.com/read/29474189/characteristic-of-ebt-xd-and-ebt3-radiochromic-film-dosimetry-for-photon-and-proton-beams
#11
Suphalak Khachonkham, Ralf Dreindl, Gerd Heilemann, Wolfgang Lechner, Hermann Fuchs, Hugo Palmans, Dietmar Georg, Peter Kuess
Recently, a new type of radiochromic film, the EBT XD film, has been introduced for high dose radiotherapy. The EBT XD film contains the same structure as the EBT3 film but has a slightly different composition and a thinner active layer. This study benchmarks the EBT XD against EBT3 film for 6 MV and 10 MV photon beams, as well as for 97.4 MeV and 148.2 MeV proton beams and 15¬ 100 kV x-rays. Dosimetric and film reading characteristics, such as post irradiation darkening, film orientation effect, lateral response artifact (LRA), film sensitivity, energy and beam quality dependency were investigated...
February 23, 2018: Physics in Medicine and Biology
https://www.readbyqxmd.com/read/29473936/differential-survivorship-of-congeneric-ornamental-fishes-under-forecasted-climate-changes-are-related-to-anaerobic-potential
#12
Luciana Mara Fé Gonçalves, Maria de Nazaré Paula da Silva, Adalberto Luis Val, Vera Maria Fonseca de Almeida-Val
Two Amazonian closely related tetras - cardinal Paracheirodon axelrodi and green neon P. simulans - were artificially acclimatized to environmental chambers mimicking future climate change scenarios (mild, moderate and extreme), using a microcosm facility. P. simulans survived (100%) to all scenarios after 30 days exposure, while P. axelrodi presented decreasing survival percentages according to environmental severity. These differences may be the reflection of distinct natural acclimatization to microhabitats between the species, which differ in thermal conditions...
February 19, 2018: Genetics and Molecular Biology
https://www.readbyqxmd.com/read/29473910/a-method-for-dynamically-selecting-the-best-frequency-hopping-technique-in-industrial-wireless-sensor-network-applications
#13
Erlantz Fernández de Gorostiza, Jorge Berzosa, Jon Mabe, Roberto Cortiñas
Industrial wireless applications often share the communication channel with other wireless technologies and communication protocols. This coexistence produces interferences and transmission errors which require appropriate mechanisms to manage retransmissions. Nevertheless, these mechanisms increase the network latency and overhead due to the retransmissions. Thus, the loss of data packets and the measures to handle them produce an undesirable drop in the QoS and hinder the overall robustness and energy efficiency of the network...
February 23, 2018: Sensors
https://www.readbyqxmd.com/read/29473854/dynamic-diffraction-studies-on-the-crystallization-phase-transformation-and-activation-energies-in-anodized-titania-nanotubes
#14
Hani Albetran, Victor Vega, Victor M Prida, It-Meng Low
The influence of calcination time on the phase transformation and crystallization kinetics of anodized titania nanotube arrays was studied using in-situ isothermal and non-isothermal synchrotron radiation diffraction from room temperature to 900 °C. Anatase first crystallized at 400 °C, while rutile crystallized at 550 °C. Isothermal heating of the anodized titania nanotubes by an increase in the calcination time at 400, 450, 500, 550, 600, and 650 °C resulted in a slight reduction in anatase abundance, but an increase in the abundance of rutile because of an anatase-to-rutile transformation...
February 23, 2018: Nanomaterials
https://www.readbyqxmd.com/read/29473823/effect-of-structural-evolution-of-zno-hfo-sub-2-sub-nanocrystals-on-eu-sup-2-sup-eu-sup-3-sup-emission-in-glass-ceramic-waveguides-for-photonic-applications
#15
Subhabrata Ghosh, Shivakiran Bhaktha B N
Eu-doped 70 SiO<sub>2</sub> - 23 HfO<sub>2</sub> - 7 ZnO (mol%) glass- ceramic waveguides have been fabricated by sol-gel method as a function of heat-treatment temperatures for on-chip blue-light emitting source applications. Structural evolution of spherical ZnO and spherical as well as rod-like HfO<sub>2</sub> nanocrystalline structures have been observed with heat-treatments at different temperatures. Initially, in the as-prepared samples at 900 °C, both, Eu<sup>2+</sup> as well as Eu<sup>3+</sup> ions are found to be present in the ternary matrix...
February 23, 2018: Nanotechnology
https://www.readbyqxmd.com/read/29473652/in-vitro-evaluation-of-ecg-synchronized-pulsatile-flow-using-the-i-cor-diagonal-pump-in-neonatal-and-pediatric-ecls-systems
#16
Morgan Moroi, Madison Force, Shigang Wang, Allen R Kunselman, Akif Ündar
The objective was to assess the i-cor electrocardiogram-synchronized diagonal pump in terms of hemodynamic energy properties for off-label use in neonatal and pediatric extracorporeal life support (ECLS) circuits. The neonatal circuit consisted of an i-cor pump and console, a Medos Hilite 800 LT oxygenator, an 8Fr arterial cannula, a 10Fr venous cannula, 91 cm of 0.6-cm ID arterial tubing, and 91 cm of 0.6-cm ID venous tubing. The pediatric circuit was identical except it included a 12Fr arterial cannula, a 14Fr venous cannula, and a Medos Hilite 2400 LT oxygenator...
February 23, 2018: Artificial Organs
https://www.readbyqxmd.com/read/29473415/critical-nuclei-size-rate-and-activation-energy-of-h2-gas-nucleation
#17
Sean R German, Martin A Edwards, Hang Ren, Henry S White
Electrochemical measurements of the nucleation rate of individual H2 bubbles at the surface of Pt nanoelectrodes (radius = 7 - 41 nm) are used to determine the critical size and geometry of H2 nuclei leading to stable bubbles. Precise knowledge of the H2 concentration at the electrode surface, C_(H_2)^surf, is obtained by controlled current reduction of H+ in a H2SO4 solution. Induction times of single-bubble nucleation events are measured by stepping the current to control C_(H_2)^surf while monitoring the voltage...
February 23, 2018: Journal of the American Chemical Society
https://www.readbyqxmd.com/read/29473314/the-effect-of-protracted-x-ray-exposure-on-cell-survival-and-metabolic-activity-of-fast-and-slow-growing-fungi-capable-of-melanogenesis
#18
Claudia Pacelli, Ruth A Bryan, Silvano Onofri, Laura Selbmann, Laura Zucconi, Igor Shuryak, Ekaterina Dadachova
The aim of this study was to analyze how protracted exposure to X-rays delivered at low dose rates of 0.0032-0.052 kGy/h affects the survival and metabolic activity of two microfungi capable of melanogenesis: fast-growing Cryptococcus neoformans (CN) and slow-growing Cryomyces antarcticus (CA). Melanized CN and CA cells survived the protracted exposure better than non-melanized ones, which was consistent with previous reports on the radioprotective role of melanin in these fungi after high dose rate exposures...
February 23, 2018: Environmental Microbiology Reports
https://www.readbyqxmd.com/read/29473232/spacer-length-independent-shuttling-of-the-pillar-5-arene-ring-in-neutral-2-rotaxanes
#19
Tomoki Ogoshi, Daisuke Kotera, Shungo Nishida, Takahiro Kakuta, Tada-Aki Yamagishi, Albert M Brouwer
For a series of neutral [2]rotaxanes consisting of a pillar[5]arene ring and axles possessing two stations separated by flexible spacers of different lengths, the free energies of activation for the ring shuttling between the stations are found to be independent of the spacer length. The constitution of the spacer affects the activation energies: replacement of CH2 groups by repulsive oxygen atoms in the axle increases the barrier. The explanation for the observed length-independence lies in the presence of a barrier for re-forming the stable co-conformation, which makes the ring travel back and forth along the thread in an intermediate state...
February 23, 2018: Chemistry: a European Journal
https://www.readbyqxmd.com/read/29473188/influence-of-cad-cam-fabrication-on-denture-surface-properties
#20
Otto Steinmassl, Herbert Dumfahrt, Ingrid Grunert, Patricia-Anca Steinmassl
BACKGROUND: Three main properties are responsible for the microbial attractiveness of denture surfaces: roughness, hydrophilicity and free surface energy. OBJECTIVE: This study investigated whether CAD/CAM-fabricated dentures are more favourable for these surface properties than conventionally fabricated dentures. METHODS: The mucosal surface roughness of 54 standardised study dentures was measured using contact profilometry. The surface hydrophilicity and free surface energy of 70 standardised denture-resin specimens were determined by contact angle measurements...
February 23, 2018: Journal of Oral Rehabilitation
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