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https://www.readbyqxmd.com/read/29793214/balanced-design-for-the-feasible-super-rocket-fuels-a-first-principle-study-on-gauche-chn-7-and-chn-3
#1
Tao Yu, Maohua Lin, Bo Wu, Jintian Wang, Chi-Tay Tsai
On the basis of the framework of cubic gauche nitrogen (cg-N), six one-eighth methanetriyl groups (>CH-) substitutes and fifteen one-fourth >CH- substitutes were optimized using the first-principle calculations based on density functional theory (DFT). Both one-eighth and one-fourth substitutes still keep the gauche structures with the simple formula CHN7 and CHN3 , respectively. The most thermodynamic stable gauche CHN7 and CHN3 are P21 qtg-C2 H2 N14 I and P21 qtg-C4 H4 N12 III, respectively. No probability density of C-C single bonds and high probability densities of C-N-C structures were found in the two substitutes...
May 16, 2018: Journal of Molecular Graphics & Modelling
https://www.readbyqxmd.com/read/29793212/should-we-excise-are-there-any-clinical-or-histologic-features-that-predict-upgrade-in-papillomas-incidental-or-non-incidental
#2
Michael Zaleski, Yun An Chen, Alison L Chetlen, Julie Mack, Liyan Xu, Daleela G Dodge, Dipti M Karamchandani
The clinical decision to excise intraductal papilloma (IDP) without atypia diagnosed on biopsy remains controversial. We sought to establish clinical and histologic predictors (if any) which may predict upgrade in IDP. 296 biopsies (in 278 women) with histologic diagnosis of IDP without atypia were retrospectively identified and placed into Incidental (no corresponding imaging correlate), or Non-incidental (positive imaging correlate) groups. 253/296 (85.5%) cases were non-incidental, and 43/296 (14.5%) were incidental...
May 11, 2018: Annals of Diagnostic Pathology
https://www.readbyqxmd.com/read/29793207/infectivity-reduction-efficacy-of-uv-irradiation-and-peracetic-acid-uv-combined-treatment-on-ms2-bacteriophage-and-murine-norovirus-in-secondary-wastewater-effluent
#3
ShihChi Weng, Nathan Dunkin, Kellogg J Schwab, James McQuarrie, Kati Bell, Joseph G Jacangelo
Peracetic acid (PAA) is a strong oxidant/bactericide that has been applied in various industries (e.g., food processing, pharmaceuticals, medical device sterilization, etc.) as a disinfectant. There is increasing interest in using PAA for wastewater disinfection because it does not form halogenated byproducts, and no post-treatment quenching is required. Previous studies have demonstrated good efficiency in controlling bacteria in wastewater, but limited information is available for viruses, especially those hosted by mammals (e...
May 21, 2018: Journal of Environmental Management
https://www.readbyqxmd.com/read/29793206/effects-on-the-hepatic-transcriptome-of-chicken-embryos-in-ovo-exposed-to-phenobarbital
#4
Jiahua Guo, Shohei Ito, Hoa Thanh Nguyen, Kimika Yamamoto, Hisato Iwata
This work aimed at evaluating the toxic effects of in ovo exposure to phenobarbital (PB) and unveiling the mode of action by transcriptome analysis in the embryonic liver of a model avian species, chicken (Gallus gallus). Embryos were initially treated with saline or 1 μg PB /g egg at Hamburger Hamilton Stage (HHS) 1 (1st day), followed by 20 days of incubation to HHS 46. At 21st day, chicks that pipped successfully were euthanized and dissected for assessing the PB caused effects on phenotypes and the liver transcriptome in both genders...
May 21, 2018: Ecotoxicology and Environmental Safety
https://www.readbyqxmd.com/read/29793197/association-of-low-moderate-urine-arsenic-and-qt-interval-cross-sectional-and-longitudinal-evidence-from-the-strong-heart-study
#5
Katherine A Moon, Yiyi Zhang, Eliseo Guallar, Kevin A Francesconi, Walter Goessler, Jason G Umans, Lyle G Best, Barbara V Howard, Richard B Devereux, Peter M Okin, Ana Navas-Acien
Epidemiologic studies suggest that chronic exposure to arsenic is related to cardiovascular disease (CVD), but the pathophysiological link remains uncertain. We evaluated the association of chronic low-moderate arsenic exposure and arsenic metabolism with baseline difference and annual change in ECG measures (QT interval, JT interval, PR interval, QRS duration, and QT dispersion) using linear mixed models in the Strong Heart Study main cohort (N = 1174, median age 55 years) and family study (N = 1695 diabetes-free, median age 36 years)...
May 21, 2018: Environmental Pollution
https://www.readbyqxmd.com/read/29793190/comparative-hazards-of-acute-myocardial-infarction-among-hospitalized-patients-with-methamphetamine-or-cocaine-use-disorders-a-retrospective-cohort-study
#6
Russell C Callaghan, Montana Halliday, Jodi Gatley, Jenna Sykes, Lawren Taylor, Claire Benny, Stephen J Kish
BACKGROUND: It is assumed that recreational use of methamphetamine can trigger acute myocardial infarction (AMI) events, but estimates of longitudinal hazards of AMI among methamphetamine users are lacking. METHODS: Retrospective cohort study: Competing-risks analysis was used to estimate time-to-AMI patterns in methamphetamine versus matched appendicitis (population-proxy) and matched cocaine (drug-control) groups. Cohorts were propensity-score-matched using demographic and clinical variables...
April 26, 2018: Drug and Alcohol Dependence
https://www.readbyqxmd.com/read/29793188/prioritization-of-reproductive-toxicants-in-unconventional-oil-and-gas-operations-using-a-multi-country-regulatory-data-driven-hazard-assessment
#7
Salmaan H Inayat-Hussain, Masao Fukumura, A Muiz Aziz, Chai Meng Jin, Low Wei Jin, Rolando Garcia-Milian, Vasilis Vasiliou, Nicole C Deziel
BACKGROUND: Recent trends have witnessed the global growth of unconventional oil and gas (UOG) production. Epidemiologic studies have suggested associations between proximity to UOG operations with increased adverse birth outcomes and cancer, though specific potential etiologic agents have not yet been identified. To perform effective risk assessment of chemicals used in UOG production, the first step of hazard identification followed by prioritization specifically for reproductive toxicity, carcinogenicity and mutagenicity is crucial in an evidence-based risk assessment approach...
May 21, 2018: Environment International
https://www.readbyqxmd.com/read/29793180/insulin-is-a-potential-antioxidant-for-diabetes-associated-cognitive-decline-via-regulating-nrf2-dependent-antioxidant-enzymes
#8
Ying Song, Wei Ding, Yun Bei, Yan Xiao, Hai-Da Tong, Li-Bo Wang, Li-Yao Ai
PURPOSE: To investigate the neuroprotective effects of insulin on diabetic encephalopathy and its mechanism. EXPERIMENTAL AND APPROACH: The diabetic model was established by injection of streptozotocin. Behavior examinations were conducted by the Morris water maze. Histopathological alterations were detected by HE staining. ROS, CAT levels and SOD activity were measured using a microplate reader. In vitro, the viability of wild type and knock-down PC12 cells was detected by MTT assay, the morphology of cells was monitored under a microscope...
May 21, 2018: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
https://www.readbyqxmd.com/read/29793174/effect-of-ca-2-ion-concentration-on-adsorption-of-poly-carboxylate-ether-based-pce-superplasticizer-on-mica
#9
Bo Wu, Byong-Wa Chun, Le Gu, Tonya L Kuhl
HYPOTHESIS: Poly(carboxylate ether)-based (PCE) superplasticizers consist of a carboxylic acid backbone and grafted poly(ethylene glycol) (PEG) side chains. Ca2+ ion bridging mechanism is commonly purported to control PCE's adsorption on negatively charged cement particle surfaces in cement suspension, thus PCE was expected to adsorb on negatively charged surfaces in synthetic pore solutions via Ca2+ /COO- interactions. EXPERIMENTS: Adsorption behaviors of a commercial PCE on negatively charged mica were studied in aqueous electrolyte solutions by a surface forces apparatus...
May 9, 2018: Journal of Colloid and Interface Science
https://www.readbyqxmd.com/read/29793168/olive-oil-polyphenols-reduce-oxysterols-induced-redox-imbalance-and-pro-inflammatory-response-in-intestinal-cells
#10
Gessica Serra, Alessandra Incani, Gabriele Serreli, Laura Porru, M Paola Melis, Carlo I G Tuberoso, Daniela Rossin, Fiorella Biasi, Monica Deiana
Dietary habits may strongly influence intestinal homeostasis. Oxysterols, the oxidized products of cholesterol present in cholesterol-containing foodstuffs, have been shown to exert pro-oxidant and pro-inflammatory effects, altering intestinal epithelial layer and thus contributing to the pathogenesis of human inflammatory bowel diseases and colon cancer. Extra virgin olive oil polyphenols possess antioxidant and anti-inflammatory properties, and concentrate in the intestinal lumen, where may help in preventing intestinal diseases...
May 16, 2018: Redox Biology
https://www.readbyqxmd.com/read/29793162/new-insights-into-the-formation-of-silver-based-nanoparticles-under-natural-and-semi-natural-conditions
#11
Andreas Wimmer, Anna Kalinnik, Michael Schuster
For the first time, the natural formation of silver-based nanoparticles (Ag-b-NPs) was studied in field investigations of two pre-alpine lakes in Germany that contain geogenic silver traces in the sub-ng L-1 range. Light-sensitive microorganisms most likely accumulate and transport these silver traces from deeper water layers to the surface. At the surface of the eutrophic lake, approximately 40% of total silver (5.7 ng L-1 ) consisted of Ag-b-NPs, whereas in the oligotrophic lake with similar enrichment of silver species, no Ag-b-NPs were detected...
May 10, 2018: Water Research
https://www.readbyqxmd.com/read/29793158/botulinum-toxin-type-a-affects-mechanics-of-non-injected-antagonistic-rat-muscles
#12
Filiz Ateş, Can A Yucesoy
Botulinum toxin type A (BTX-A) effects on the mechanics of non-injected antagonistic muscles are unknown. The aim was to test the following hypotheses in a rat model: BTX-A injected into gastrocnemius medialis (GM) and lateralis (GL) (1) decreases forces of the antagonistic tibialis anterior (TA) and extensor digitorum longus (EDL), (2) reduces length range of force exertion and (3) increases passive forces of the TA, and (4) changes inter-antagonistic and inter-synergistic epimuscular myofascial force transmission (EMFT)...
May 17, 2018: Journal of the Mechanical Behavior of Biomedical Materials
https://www.readbyqxmd.com/read/29793156/mechanical-properties-of-the-human-scalp-in-tension
#13
Lisa Falland-Cheung, Mario Scholze, Pamela F Lozano, Benjamin Ondruschka, Darryl C Tong, Paul A Brunton, J Neil Waddell, Niels Hammer
Mechanical properties of the human scalp have not been investigated to a great extent with limited information available. The purpose of this study was to provide new baseline material data for human scalp tissue of various ages, which can be applied to experimental and constitutive models, such as in the area of impact biomechanics. This study used specimens from the left and right temporal, fronto-parietal and occipital regions of the human scalp. It investigated the tensile behavior of scalp tissue using tissues harvested from unfixed, fresh cadavers...
May 17, 2018: Journal of the Mechanical Behavior of Biomedical Materials
https://www.readbyqxmd.com/read/29793151/effect-of-two-months-whole-body-vibration-on-hoof-growth-rate-in-the-horse-a-pilot-study
#14
Bart Tom Halsberghe
Hoof problems are commonly seen in veterinary practice and manipulation of hoof growth rate can be practical and beneficial for that matter. The purpose of this research was to evaluate the effect of whole body vibration (WBV) on hoof growth rate of front feet in the horse. The study was an experimental, single subject, repeated measure design, with all horses serving as control and treatment. Ten horses were subject to WBV, 30 min, twice daily, five days a week, for 60 days in addition to their regular exercise routine...
May 16, 2018: Research in Veterinary Science
https://www.readbyqxmd.com/read/29793150/exploring-the-victimization%C3%A2-early-substance-misuse-relationship-in-search-of-moderating-and-mediating-effects
#15
Glenn D Walters, Dorothy L Espelage
This study was designed to address two research questions. The first research question asked whether physical abuse victimization at the hands of parents/guardians, bullying victimization at the hands of peers, and the abuse x bullying interaction encouraged early involvement in substance misuse. The second research question inquired as to whether the victimization‒substance misuse relationship was mediated by variables proposed by various theories and research studies-specifically, cognitive impulsivity, negative affect, and low self-esteem...
May 21, 2018: Child Abuse & Neglect
https://www.readbyqxmd.com/read/29793139/the-use-of-low-intensity-pulsed-ultrasound-in-treating-delayed-union-of-fifth-metatarsal-fractures
#16
Kar Hao Teoh, Robert Whitham, Jenny F Wong, Kartik Hariharan
BACKGROUND: There are no studies looking at the success rate of low-intensity pulsed ultrasound (LIPUS) in fifth metatarsal fracture delayed unions to our knowledge. The aim of this study is to investigate the use of LIPUS treatment for delayed union of fifth metatarsal fractures. METHODS: A retrospective review of patients who were treated with LIPUS following a delayed union of fifth metatarsal fracture was conducted over a three-year period. RESULTS: There were thirty patients (9 males, 21 females) in this cohort...
January 31, 2018: Foot
https://www.readbyqxmd.com/read/29793130/anxiety-memories-and-coping-in-patients-undergoing-intracranial-tumor-surgery
#17
Tom J van Ark, Markus Klimek, Peter de Smalen, Arnaud J P E Vincent, Robert Jan Stolker
OBJECTIVES: The diagnosis and the surgical removal of a brain tumor can have serious impact on the quality of life of a patient. The question rises, whether having more or just less memories of the procedure is better for coping with such an event. Furthermore, for preoperative information of future patients it is important to know how patients process their emotions and memories. The primary objective of this study was to investigate the link between preoperative anxiety, the perioperative experience and the quantity and quality of postoperative memories in patients who underwent intracranial tumor surgery...
May 17, 2018: Clinical Neurology and Neurosurgery
https://www.readbyqxmd.com/read/29793122/intra-and-interrater-reliability-of-the-lumbar-locked-thoracic-rotation-test-in-competitive-swimmers-ages-10-through-18-years
#18
Stef Feijen, Kevin Kuppens, Angela Tate, Isabel Baert, Thomas Struyf, Filip Struyf
OBJECTIVES: Measuring thoracic spine mobility can be of interest to competitive swimmers as it has been associated with shoulder girdle function and scapular position in subjects with and without shoulder pain. At present, no reliability data of thoracic spine mobility measurements are available in the swimming population. This study aims to evaluate the within-session intra- and interrater reliability of the "lumbar-locked rotation test" for thoracic spine rotation in competitive swimmers aged 10 to 18 years...
April 17, 2018: Physical Therapy in Sport
https://www.readbyqxmd.com/read/29793121/head-coaches-attitudes-towards-injury-prevention-and-use-of-related-methods-in-professional-basketball-a-survey
#19
J Wilke, D Niederer, L Vogt, W Banzer
OBJECTIVES: To investigate the practices and attitudes of professional basketball head coaches towards injury prevention. DESIGN: Survey. SETTING: Elite-level basketball. PARTICIPANTS: Head coaches of all 366 German professional teams. MAIN OUTCOME MEASURES: Use of injury risk screening methods, rated importance of different musculoskeletal injuries and rated effectiveness of preventive interventions...
April 17, 2018: Physical Therapy in Sport
https://www.readbyqxmd.com/read/29793115/estimating-chemical-ecotoxicity-in-eu-ecolabel-and-in-eu-product-environmental-footprint
#20
Erwan Saouter, An De Schryver, Rana Pant, Serenella Sala
The EU Commission Ecolabel and the Product and Environmental Footprint (PEF) aim at promoting the development and consumption of greener products. The product aquatic toxicity score from these 2 methods may lead in some circumstances to opposite conclusions. Although this could be interpreted as an inconsistency, the score should not be compared to each other but used in a complementary way. In short, CDV provided a "full" product formula aquatic toxicity score, even if some chemicals may never reach or persist in freshwater ecosystems...
May 21, 2018: Environment International
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