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https://www.readbyqxmd.com/read/29457679/features-of-protonation-of-the-simplest-weakly-basic-molecules-so2-co-n2o-co2-and-others-by-solid-carborane-superacids
#1
Evgenii Stoyanov, Irina S Stoyanova
Experimental study on protonation of simple weakly basic molecules (L) by the strongest solid superacid, H(CHB11F11), showed that basicity of SO2 is high enough (during attachment to the acidic H atoms at partial pressure of 1 atm) to break the bridged H-bonds of the polymeric acid and to form a mixture of solid mono- and disolvates, LH+‧‧‧An- and L-H+-L. With a decrease in the basicity of L = CO (via C), N2O, and CO (via O), only proton monosolvates are formed, which approach L-H+-An species with convergence of the strengths of bridged H-bonds...
February 19, 2018: Angewandte Chemie
https://www.readbyqxmd.com/read/29457419/-treatment-of-scapular-fractures-with-lateral-incision-and-bridge-combined-internal-fixation-system
#2
Yu-Cheng Zhou, Lin-Xin Yu, Hong Duan, Jie Min, Xiao-Feng Yuan, Peng Yu, Bang-Xu Nie, Jun Hu
OBJECTIVE: To investigate the clinical results of scapula fractures with lateral incision combined with bridge internal fixation system. METHODS: From October 2012 to December 2016, 20 cases of scapular fractures were treated through the lateral incision combined with bridge fixation system, including 15 males and 5 females, with an average age of 31.6 years old(ranged, 21 to 52 years old). Fourteen cases were scapular body fracture, 10 were scapular neck fracture, 6 were scapular fracture, 1 was acromion fracture, 1 was coracoid fracture, 4 were the glenoid rim fracture, 3 were the glenoid fossa fracture...
October 25, 2017: Zhongguo Gu Shang, China Journal of Orthopaedics and Traumatology
https://www.readbyqxmd.com/read/29457176/effect-of-hu-protein-on-the-conformation-and-compaction-of-dna-in-a-nanochannel
#3
Durgarao Guttula, Fan Liu, Jeroen A van Kan, Véronique Arluison, Johan R C van der Maarel
The effect of the heat unstable nucleoid structuring protein HU on the conformation of single DNA molecules confined in a nanochannel was investigated with fluorescence microscopy. Pre-incubated DNA molecules contract in the longitudinal direction of the channel with increasing concentration of HU. This contraction is mainly due to HU-mediated bridging of distal DNA segments and is controlled by channel diameter as well as ionic composition and strength of the buffer. For over-threshold concentrations of HU, the DNA molecules compact into an condensed form...
February 19, 2018: Soft Matter
https://www.readbyqxmd.com/read/29456903/winged-scapula-a-comprehensive-review-of-surgical-treatment
#4
REVIEW
Marc Vetter, Ordessia Charran, Emre Yilmaz, Bryan Edwards, Mitchel A Muhleman, Rod J Oskouian, R Shane Tubbs, Marios Loukas
Winged scapula is caused by paralysis of the serratus anterior or trapezius muscles due to damage to the long thoracic or accessory nerves, resulting in loss of strength and range of motion of the shoulder. Because this nerve damage can happen in a variety of ways, initial diagnosis may be overlooked. This paper discusses the anatomical structures involved in several variations of winged scapula, the pathogenesis of winged scapula, and several historical and contemporary surgical procedures used to treat this condition...
December 7, 2017: Curēus
https://www.readbyqxmd.com/read/29456902/review-of-assessment-scales-for-diagnosing-and-monitoring-sports-related-concussion
#5
REVIEW
Alexa M Dessy, Frank J Yuk, Akbar Y Maniya, Alex Gometz, Jonathan J Rasouli, Mark R Lovell, Tanvir F Choudhri
Sports-related concussion has emerged as a public health crisis due to increased diagnosis of the condition and increased participation in organized and recreational athletics worldwide. Under-recognition of concussions can lead to premature clearance for athletic participation, leaving athletes vulnerable to repeat injury and subsequent short- and long-term complications. There is overwhelming evidence that assessment and management of sports-related concussions should involve a multifaceted approach. A number of assessment criteria have been developed for this purpose...
December 7, 2017: Curēus
https://www.readbyqxmd.com/read/29456777/toe-gap-force-is-related-to-ultrasonic-parameter-of-calcaneus-bone-status-in-general-population
#6
Tsuyoshi Tajika, Atsushi Yamamoto, Noboru Oya, Takanori Kitagawa, Hiroki Kobayashi, Hitoshi Shitara, Haku Iizuka, Kenji Takagishi, Hirotaka Chikuda
Background: Elucidating the relation between bone health condition and muscle strength can provide useful knowledge for Japan's super-aged society. This study ascertained the Speed Of Sound (SOS) of the calcaneus and upper and lower limb muscle strength in a general population. Methods: Medical examinations were conducted of 277 adult residents (100 men, 177 women; average age 67.1 years) of a mountain village. Bilateral hand grip and hand key pinch strength were measured...
2018: Open Orthopaedics Journal
https://www.readbyqxmd.com/read/29456012/injectable-and-body-temperature-sensitive-hydrogels-based-on-chitosan-and-hyaluronic-acid-for-ph-sensitive-drug-release
#7
Wei Zhang, Xin Jin, Heng Li, Run-Run Zhang, Cheng-Wei Wu
Hydrogels based on chitosan/hyaluronic acid/β-sodium glycerophosphate demonstrate injectability, body temperature sensitivity, pH sensitive drug release and adhesion to cancer cell. The drug (doxorubicin) loaded hydrogel precursor solutions are injectable and turn to hydrogels when the temperature is increased to body temperature. The acidic condition (pH 4.00) can trigger the release of drug and the cancer cell (Hela) can adhere to the surface of the hydrogels, which will be beneficial for tumor site-specific administration of drug...
April 15, 2018: Carbohydrate Polymers
https://www.readbyqxmd.com/read/29456004/the-effect-of-oxyalkylation-and-application-of-polymer-dispersions-on-the-thermoformability-and-extensibility-of-paper
#8
Jarmo Kouko, Harri Setälä, Atsushi Tanaka, Alexey Khakalo, Jarmo Ropponen, Elias Retulainen
Wood fiber-based packaging materials, as renewable materials, have growing market potential due to their sustainability. A new breakthrough in cellulose-based packaging requires some improvement in the mechanical properties of paper. Bleached softwood kraft pulp was mechanically treated, in two stages, using high- and low-consistency refining, sequentially. Chemical treatment of pulp using the oxyalkylation method was applied to modify a portion of fiber material, especially the fiber surface, and its compatibility with polymer dispersions including one carbohydrate polymer...
April 15, 2018: Carbohydrate Polymers
https://www.readbyqxmd.com/read/29455897/communal-motivation-in-couples-coping-with-vulvodynia-sexual-distress-mediates-associations-with-pain-depression-and-anxiety
#9
Amy Muise, Sophie Bergeron, Emily A Impett, Isabelle Delisle, Natalie O Rosen
OBJECTIVE: To examine the role of a novel motivational perspective-sexual communal motivation-in women's pain during intercourse and both partners' distress in couples coping with vulvodynia, a prevalent gynecological pain condition. Our goal was to test whether sexual communal strength (i.e., motivation to meet a partner's sexual needs) and unmitigated sexual communion (i.e., prioritization of a partner's sexual needs in neglect of one's own needs) were indirectly associated with pain, depression, and anxiety via sexual distress...
March 2018: Journal of Psychosomatic Research
https://www.readbyqxmd.com/read/29455461/population-density-mediates-the-interaction-between-pre-and-post-mating-sexual-selection
#10
Erin L McCullough, Bruno A Buzatto, Leigh W Simmons
When females mate with more than one male, sexual selection acts both before and after mating. The interaction between pre- and post-mating episodes of selection is expected to be context dependent, but few studies have investigated how total sexual selection changes under different ecological conditions. We examined how population density mediates the interaction between pre- and post-mating sexual selection by establishing replicate populations of the horned dung beetle Onthophagus taurus at low, medium, and high densities, and using microsatellite-based parentage analyses to measure male fitness...
February 17, 2018: Evolution; International Journal of Organic Evolution
https://www.readbyqxmd.com/read/29455387/biochemical-process-of-ureolysis-based-microbial-caco-3-precipitation-and-its-application-in-self-healing-concrete
#11
Jing Xu, Xianzhi Wang, Binbin Wang
Urea hydrolysis has already been considered as the most effective pathway for microbially induced CaCO3 precipitation (MICP). The present work first studied the combination of several key factors including initial pH, temperature, and dosage of urea, which contribute to the biochemical process of MICP. Under an amiable condition of pH and temperature, the dosage of urea has a significant impact on the rate of urea degradation and CaCO3 precipitation. A bacteria-based self-healing system was developed by loading healing agents on ceramsite carriers...
February 17, 2018: Applied Microbiology and Biotechnology
https://www.readbyqxmd.com/read/29455038/mechanical-and-degradation-property-improvement-in-a-biocompatible-mg-ca-sr-alloy-by-thermomechanical-processing
#12
Hunter B Henderson, Vidhya Ramaswamy, Alexander E Wilson-Heid, Michael S Kesler, Josephine B Allen, Michele V Manuel
Magnesium-based alloys have attracted interest as a potential material to comprise biomedical implants that are simultaneously high-strength and temporary, able to provide stabilization before degrading safely and able to be excreted by the human body. Many alloy systems have been evaluated, but this work reports on improved properties through hot extrusion of one promising alloy: Mg-1.0 wt% Ca-0.5 wt%Sr. This alloy has previously demonstrated promising toxicity and degradation properties in the as-cast and rolled conditions...
February 3, 2018: Journal of the Mechanical Behavior of Biomedical Materials
https://www.readbyqxmd.com/read/29454816/optimization-of-granular-waste-production-based-on-mechanical-properties
#13
Ali Ghasemi, Reza Amiri Chayjan, Hossein Jahanian Najafabadi
Pellet production of food and agricultural wastes is a suitable method to supply livestock feed. Mechanical properties of pellets play an important role in their handling and transportation. In this study, the mechanical properties of pellets made from waste are investigated. After the pelleting process, the pellets were dried with a laboratory convective hot air dryer until reaching a safe moisture content. The effects of feedstock moisture content (0.54, 0.88, and 1.2 kgw kgDM -1 ), particle size (PS < 0...
February 14, 2018: Waste Management
https://www.readbyqxmd.com/read/29454801/the-influence-of-pb-addition-on-the-properties-of-fly-ash-based-geopolymers
#14
Violeta Nikolić, Miroslav Komljenović, Nataša Džunuzović, Zoran Miladinović
Preventing or reducing negative effects on the environment from the waste landfilling is the main goal defined by the European Landfill Directive. Generally geopolymers can be considered as sustainable binders for immobilization of hazardous wastes containing different toxic elements. In this paper the influence of addition of high amount of lead on structure, strength, and leaching behavior (the effectiveness of Pb immobilization) of fly ash-based geopolymers depending on the geopolymer curing conditions was investigated...
February 12, 2018: Journal of Hazardous Materials
https://www.readbyqxmd.com/read/29454279/bonding-of-composite-cements-to-zirconia-a-systematic-review-and-meta-analysis-of-in-vitro-studies
#15
REVIEW
Putsadeeporn Thammajaruk, Masanao Inokoshi, Shanley Chong, Massimiliano Guazzato
OBJECTIVES: The aim of this study was to systematically review the literature and statistically analyze bond strength data to identify the influence that composite cements, type of test methodology, chemical and mechanical pre-treatments have on the bond strength of composite cements to zirconia in three different artificial aging conditions. METHODS: The literature was electronically searched in MEDLINE, PUBMED, EMBASE, and SCOPUS to select relevant articles that evaluated the bond strength between zirconia and composite cements...
February 8, 2018: Journal of the Mechanical Behavior of Biomedical Materials
https://www.readbyqxmd.com/read/29454212/adsorption-of-sulfamethoxazole-by-magnetic-biochar-effects-of-ph-ionic-strength-natural-organic-matter-and-17%C3%AE-ethinylestradiol
#16
Febelyn Reguyal, Ajit K Sarmah
Recent studies have shown the widespread occurrence of pharmaceuticals in the aquatic environment leading to increasing global concern on their potential adverse effects in the environment and public health. In this study, we evaluated the use of magnetic biochar derived from pine sawdust, one of New Zealand's major wood wastes, to remove an emerging contaminant, sulfamethoxazole (SMX), at different pH, ionic strength, natural organic matter (NOM) and a competing compound, 17α-ethinylestradiol (EE2). In single-solute system, the sorption of SMX onto magnetic biochar was found to be highly pH-dependent and slightly increased with increase in ionic strength...
February 14, 2018: Science of the Total Environment
https://www.readbyqxmd.com/read/29454106/binocular-vision-adaptively-suppresses-delayed-monocular-signals
#17
Bruno Richard, Eva Chadnova, Daniel H Baker
A neutral density filter placed before one eye will produce a dichoptic imbalance in luminance, which attenuates responses to visual stimuli and lags neural signals from retina to cortex in the filtered eye. When stimuli are presented to both the filtered and unfiltered eye (i.e., binocularly), neural responses show little attenuation and no lag compared with their baseline counterpart. This suggests that binocular visual mechanisms must suppress the attenuated and delayed input from the filtered eye; however, the mechanisms involved remain unclear...
February 14, 2018: NeuroImage
https://www.readbyqxmd.com/read/29453773/electrospray-ionization-source-with-a-rear-extractor
#18
Lee Chuin Chen, Satoru Tsutsui, Tsubasa Naito, Satoshi Ninomiya, Kenzo Hiraoka
A new electrospray source design is introduced by having an extractor electrode placed at 1~2 mm behind the emitter tip. The extractor was integrated into the sprayer body as a single device. An insulating tube was used to isolate the emitter from the extractor and to deliver the sheath gas for the electrospray. The electric field strength at the emitter was primarily determined by the relative position and the potential between the needle and the extractor, therefore, the spraying condition was insusceptible to the change of sprayer position or orientation with respect to the ion sampling inlet...
February 17, 2018: Journal of Mass Spectrometry: JMS
https://www.readbyqxmd.com/read/29453491/does-hearing-aid-use-affect-audiovisual-integration-in-mild-hearing-impairment
#19
Anja Gieseler, Maike A S Tahden, Christiane M Thiel, Hans Colonius
There is converging evidence for altered audiovisual integration abilities in hearing-impaired individuals and those with profound hearing loss who are provided with cochlear implants, compared to normal-hearing adults. Still, little is known on the effects of hearing aid use on audiovisual integration in mild hearing loss, although this constitutes one of the most prevalent conditions in the elderly and, yet, often remains untreated in its early stages. This study investigated differences in the strength of audiovisual integration between elderly hearing aid users and those with the same degree of mild hearing loss who were not using hearing aids, the non-users, by measuring their susceptibility to the sound-induced flash illusion...
February 16, 2018: Experimental Brain Research. Experimentelle Hirnforschung. Expérimentation Cérébrale
https://www.readbyqxmd.com/read/29452782/multimorbidity-and-quality-of-life-at-mid-life-a-systematic-review-of-general-population-studies
#20
REVIEW
Jeeva Kanesarajah, Michael Waller, Jennifer A Whitty, Gita D Mishra
There is substantial multimorbidity at mid-life but little is known about the strength of evidence on multimorbidity and health-related quality of life (HrQoL) at mid-life. This review addresses this gap, focusing on studies of the general population. PubMed, Web of Science, Embase and APA PsycNET databases were screened on 6 March 2017 for original research on multimorbidity and HrQoL in adults aged 40-65 years from the general population. Studies focused on index conditions, using single-item HrQoL measures, unlikely to represent the general population (e...
March 2018: Maturitas
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