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https://www.readbyqxmd.com/read/28749583/chiral-sulfur-functional-groups-as-definers-of-the-chirality-at-the-metal-in-ir-and-rh-half-sandwich-complexes-a-combined-cd-x-ray-study
#1
Miguel A Sierra, Maria C de la Torre, Roberto Fernandez de la Pradilla, Alma Viso, Maria Frutos, Marta G Avello, Marina Velado, Heinz Gornitzka, Catherine Hemmert
Mesoionic carbenes (MIC) derived from triazolium salts containing chiral sulfoxide or sulfoximine functional groups lead to enantiopure chiral-at-metal Ir(III) and Rh(III) half-sandwich complexes, through the sequence MIC complexation-C-H aromatic activation. The process is efficient and totally diastereoselective in the formation of enantiopure five membered metallacycles. The use of the enantiomers of the sulfur chiral groups allows to prepare complexes having opposite configurations at the metal. Complete retention of the configuration at the metal center is observed during the formation of cationic Ir(III) complexes and upon insertion of alkynes into the Ir(III)-C bond, as demonstrated by a combined Circular Dichroism (CD)-X-ray study...
July 27, 2017: Chemistry: a European Journal
https://www.readbyqxmd.com/read/28749417/modeling-the-effect-of-physical-activity-on-obesity-in-china-evidence-from-the-longitudinal-china-health-and-nutrition-study-1989-2011
#2
Tao Zhang
Although physical activity has been widely recognized as an important influential factor in determining the risk of obesity, the results in the existing literature empirically examining such issue are mixed. Especially for China, relevant studies are rarely found. One aim of this study is to test the direction of effects between obesity and physical activity. It uses longitudinal data to investigate the relationship and causality between physical activity and obesity for both children and adults in China. The longitudinal data and dynamic panel model used here can yield more solid results than the other studies employing cross-sectional data, particularly considering strict endogeneity and self-selection...
July 27, 2017: International Journal of Environmental Research and Public Health
https://www.readbyqxmd.com/read/28749343/a-potential-based-inverse-spectral-method-to-non-invasively-localize-discordant-distributions-of-alternans-on-the-heart-from-the-ecg
#3
Jaume Coll-Font, Burak Erem, Dana H Brooks
T-wave alternans (TWA), defined as the beat-to-beat alternation in amplitude of the T-waves, has been shown to be linked to ventricular fibrillation (VF). However, current TWA tests have high sensitivity but low specificity in determining who is at risk. To overcome this limitation, it might be helpful to determine the spatial distribution of any regions on the heart that alternate in opposite phase. Understanding these spatial distributions in relation to the regular activation of the heart could help explain the mechanism for the genesis of VF and thus disambiguate the low specificity of TWA...
July 26, 2017: IEEE Transactions on Bio-medical Engineering
https://www.readbyqxmd.com/read/28748590/conscientious-objection-as-a-barrier-for-implementing-voluntary-termination-of-pregnancy-in-uruguay-gynecologists-attitudes-and-behavior
#4
Francisco Coppola, Leonel Briozzo, Fernanda Nozar, Verónica Fiol, Diego Greif
OBJECTIVE: To analyze the attitudes and behavior of gynecologists in Uruguay with respect to the right to conscientious objection that is included in the law concerning voluntary termination of pregnancy. METHODS: The relevant laws and decrees, academic articles, legal or administrative claims, and the positions published by the institutions representing physicians or by groups of gynecologists were analyzed. RESULTS: In general, the institutions positioned themselves in favor of correct application of conscientious objection and the immense majority of gynecologists followed this conduct...
August 2016: International Journal of Gynaecology and Obstetrics
https://www.readbyqxmd.com/read/28748267/-sex-education-and-prevention-of-sexual-violence-contributions-to-a-differential-sensitive-prevention-of-sexualised-violence
#5
REVIEW
Martin Wazlawik, Bernd Christmann, Arne Dekker
Prevention of sexual violence against children and adolescents obtains high priority in educational contexts. This is due to the massive (possible) psychosocial impacts of sexual victimization as well as to the considerable prevalence rates that are reported in current studies. Preventive approaches are predominantly native to violence prevention and sex education where they are characterized by independent lines of tradition and positions. This contribution outlines their empirically largely unexplained relation with a focus on the history and development of the discourses of sex education...
July 26, 2017: Bundesgesundheitsblatt, Gesundheitsforschung, Gesundheitsschutz
https://www.readbyqxmd.com/read/28747905/from-ecological-stoichiometry-to-biochemical-composition-variation-in-n-and-p-supply-alters-key-biosynthetic-rates-in-marine-phytoplankton
#6
Julia Grosse, Amanda Burson, Maayke Stomp, Jef Huisman, Henricus T S Boschker
One of the major challenges in ecological stoichiometry is to establish how environmental changes in resource availability may affect both the biochemical composition of organisms and the species composition of communities. This is a pressing issue in many coastal waters, where anthropogenic activities have caused large changes in riverine nutrient inputs. Here we investigate variation in the biochemical composition and synthesis of amino acids, fatty acids (FA), and carbohydrates in mixed phytoplankton communities sampled from the North Sea...
2017: Frontiers in Microbiology
https://www.readbyqxmd.com/read/28747741/the-microdamage-and-expression-of-sclerostin-in-peri-implant-bone-under-one-time-shock-force-generated-by-impact
#7
Xiaoou Diao, Zhirui Li, Baili An, Haitao Xin, Yulu Wu, Kai Li, Fan Feng, Chenyun Dou
Osseointegration is the key to implant stability and occlusal support. Biomechanical response and remodeling of peri-implant bone occurs under impact loading. Sclerostin participates in bone formation and resorption through Wnt and RANKL pathways. However the mechanism of microdamage and expression of sclerostin in peri-implant bone under impact load is still unclear. In present study, specific impact forces were applied to the implants with favorable osseointegration in rabbits. The microdamage of peri-implant bone and the expression of sclerostin, β-catenin and RANKL during the process of bone damage and remodeling were investigated by micro-CT, histology, immunofluorescence and RT-qPCR analysis...
July 26, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28747573/the-influence-of-adjuvant-on-ureb-protection-against-helicobacter-pylori-through-the-diversity-of-cd4-t-cell-epitope-repertoire
#8
Bin Li, Hanmei Yuan, Li Chen, Heqiang Sun, Jian Hu, Shanshan Wei, Zhuo Zhao, Quanming Zou, Chao Wu
Adjuvants are widely used to enhance the effects of vaccines against pathogen infections. Interestingly, different adjuvants and vaccination routes usually induce dissimilar immune responses, and can even have completely opposite effects. The mechanism remains unclear. In this study, urease B subunit (UreB), an antigen of Helicobacter pylori (H. pylori) that can induce protective immune responses, was used as a model to vaccinate mice. We investigated the effects of different adjuvants and routes on consequent T cell epitope-specific targeting and protection against H...
July 12, 2017: Oncotarget
https://www.readbyqxmd.com/read/28746891/long-term-variations-in-sediment-heavy-metals-of-a-reservoir-with-changing-trophic-states-implications-for-the-impact-of-climate-change
#9
Qiong Wu, Jun Qi, Xinghui Xia
Two dated sediment cores from the Miyun Reservoir of Beijing in China were analyzed to reconstruct the pollution history of heavy metals including cadmium (Cd), chromium (Cr), iron (Fe), nickel (Ni), and zinc (Zn) as well as phosphorus (P). Enrichment factor (EF) and geoaccumulation index (Igeo) were applied to assess the enrichment status of heavy metals. Average EF and Igeo values indicated that the studied heavy metals in the sediments mainly originated from non-point source pollution and soil-water erosion, showing low ecological risks...
July 23, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28746466/microrna-143-inhibits-cell-growth-by-targeting-erk5-and-map3k7-in-breast-cancer
#10
L L Zhou, J L Dong, G Huang, Z L Sun, J Wu
This study aimed to investigate the function and mechanism of microRNA-143 (miR-143) in the occurrence and development of breast cancer (BC). A total of 30 BC tissues, 30 corresponding noncancerous tissues, and 10 normal control (NC) breast tissues were obtained to detect the levels of miR-143, extracellular signal-regulated kinase 5 (ERK5) and mitogen-activated protein 3 kinase 7 (MAP3K7) using RT-qPCR, western blotting or immunohistochemistry. The correlation of miR-143 with ERK5 or MAP3K7 was evaluated using Pearson correlation analysis...
July 20, 2017: Brazilian Journal of Medical and Biological Research, Revista Brasileira de Pesquisas Médicas e Biológicas
https://www.readbyqxmd.com/read/28746414/when-habitat-matters-habitat-preferences-can-modulate-co-occurrence-patterns-of-similar-sympatric-species
#11
César Augusto Estevo, Mariana Baldy Nagy-Reis, James D Nichols
Disentangling the role of competition in regulating the distribution of sympatric species can be difficult because species can have different habitat preferences or time use that introduce non-random patterns that are not related to interspecific interactions. We adopted a multi-step approach to systematically incorporate habitat preferences while investigating the co-occurrence of two presumed competitors, morphologically similar, and closely related ground-dwelling birds: the brown tinamou (Crypturellus obsoletus) and the tataupa tinamou (C...
2017: PloS One
https://www.readbyqxmd.com/read/28745445/switchable-stereoselectivity-in-bromoaminocyclization-of-olefins-catalyzed-by-br%C3%A3-nsted-acids-of-anionic-chiral-coiii-complexes
#12
Liuzhu Gong, Hua-Jie Jiang, Kun Liu, Jie Yu, Ling Zhang
Brønsted acids of anionic chiral CoIII complexes have been first found to act as bifunctional phase-transfer catalysts to shuttle the substrates across interface and control stereoselectivity. The diastereomeric chiral CoIII-templated Brønsted acids with the same chiral ligands enabled a switchably enantioselective bromoamino-cyclization of olefins to afford two opposite enantiomers of 2-substituted pyrrolidines with high enantioselectivities (up to 99:1 e.r.), respectively.
July 26, 2017: Angewandte Chemie
https://www.readbyqxmd.com/read/28745437/vascularized-ulnar-periosteal-pedicled-flap-for-forearm-reconstruction-anatomical-study-and-a-case-report
#13
Barrera-Ochoa Sergi, Velez Roberto, Rodriguez-Baeza Alfonso, De Bergua-Domingo Josep Maria, Knörr Jorge, Soldado Francisco
PURPOSE: Through an anatomical review, the aim of this study is to define the ulnar periosteal branches of the posterior interosseous vessels (PIV). In addition, we report the clinical utility of a vascularized ulnar periosteal pedicled flap (VUPPF), supplied by the investigated PIV, in a complex case of radial nonunion. METHODS: Ten upper limbs latex colored from fresh human cadavers were used. Branches of the PIV were dissected under 2.5× loupe magnification, noting the periosteal, muscular, and cutaneous branches arising distal to the interosseous recurrent artery...
July 26, 2017: Microsurgery
https://www.readbyqxmd.com/read/28744713/genome-wide-analysis-of-gene-expression-profiling-revealed-that-cop9-signalosome-is-essential-for-correct-expression-of-fe-homeostasis-genes-in-arabidopsis
#14
Seckin Eroglu, Emre Aksoy
In plant cells, either excess or insufficient iron (Fe) concentration triggers stress responses, therefore it is strictly controlled. Proteasome-mediated degradation through ubiquitination of Fe homeostasis proteins has just become the focus of research in recent years. Deactivating ubiquitin ligases, COP9 signalosome has a central importance in the translational control of various stress responses. The aim of the study was to investigate COP9 signalosome in Fe deficiency response of Strategy I plants. In silico analysis of a set of Fe-deficiency-responsive genes was conducted against the transcriptome of Arabidopsis csn mutant lines using Genevestigator software...
July 25, 2017: Biometals: An International Journal on the Role of Metal Ions in Biology, Biochemistry, and Medicine
https://www.readbyqxmd.com/read/28744005/modeling-of-an-inverted-drift-tube-for-improved-mobility-analysis-of-aerosol-particles
#15
Minal Nahin, Derek Oberreit, Nobuhiko Fukushima, Carlos Larriba-Andaluz
A new mobility particle analyzer, which has been termed Inverted Drift Tube, has been modeled analytically as well as numerically and proven to be a very capable instrument. The basis for the new design have been the shortcomings of the previous ion mobility spectrometers, in particular (a) diffusional broadening which leads to degradation of instrument resolution and (b) inadequate low and fixed resolution (not mobility dependent) for large sizes. To overcome the diffusional broadening and have a mobility based resolution, the IDT uses two varying controllable opposite forces, a flow of gas with velocity v gas , and a linearly increasing electric field that opposes the movement...
July 25, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28743994/autistic-traits-and-positive-psychotic-experiences-modulate-the-association-of-psychopathic-tendencies-with-theory-of-mind-in-opposite-directions
#16
Steven M Gillespie, Ian J Mitchell, Ahmad M Abu-Akel
Various clinical disorders, including psychopathy, and autism and schizophrenia spectrum disorders, have been linked with impairments in Theory of Mind (ToM). However, although these conditions can co-occur in the same individual, the effect of their inter-play on ToM abilities has not been investigated. Here we assessed ToM abilities in 55 healthy adults while performing a naturalistic ToM task, requiring participants to watch a short film and judge the actors' mental states. The results reveal for the first time that autistic traits and positive psychotic experiences interact with psychopathic tendencies in opposite directions to predict ToM performance-the interaction of psychopathic tendencies with autism traits was associated with a decrement in performance, whereas the interaction of psychopathic tendencies and positive psychotic experiences was associated with improved performance...
July 25, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28743948/realisation-of-topological-zero-energy-mode-in-bilayer-graphene-in-zero-magnetic-field
#17
Janghee Lee, Kenji Watanabe, Takashi Taniguchi, Hu-Jong Lee
Bilayer graphene (BLG) gapped by a vertical electric field represents a valley-symmetry-protected topological insulating state. Emergence of a new topological zero-energy mode has been proposed in BLG at a boundary between regions of inverted band gaps induced by two oppositely polarized vertical electric fields. However, its realisation has been challenged by the enormous difficulty in arranging two pairs of accurately aligned split gates on the top and bottom surfaces of clean BLG. Here we report realisation of the topological zero-energy mode in ballistic BLG, with zero-bias differential conductance close to the ideal value of 4 e (2)/h (e is the electron charge and h is Planck's constant) along a boundary channel between a pair of gate-defined inverted band gaps...
July 25, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28743931/topological-heat-transport-and-symmetry-protected-boson-currents
#18
Ángel Rivas, Miguel A Martin-Delgado
The study of non-equilibrium properties in topological systems is of practical and fundamental importance. Here, we analyze the stationary properties of a two-dimensional bosonic Hofstadter lattice coupled to two thermal baths in the quantum open-system formalism. Novel phenomena appear like chiral edge heat currents that are the out-of-equilibrium counterparts of the zero-temperature edge currents. They support a new concept of dissipative symmetry-protection, where a set of discrete symmetries protects topological heat currents, differing from the symmetry-protection devised in closed systems and zero-temperature...
July 25, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28743920/sexual-pair-formation-in-a-cicada-mediated-by-acoustic-behaviour-of-females-and-positive-phonotaxis-of-males
#19
Zehai Hou, Changqing Luo, J Dale Roberts, Cong Wei
The functions of female song found in a few cicadas have rarely been studied. In the cicada Subpsaltria yangi we investigated the acoustic behaviour and signal structure of songs produced by females, the phonotaxis of males, and mate choice, as well as the selective pressure imposed on this species by predators. Pair-formation in S. yangi occurs when males signal, females respond, then males move to signaling females, which is opposite to that in most other cicadas where females move to calling males. Females only mate once and are sexually unreceptive after copulation...
July 25, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28743831/effective-protection-against-acute-respiratory-distress-syndrome-sepsis-injury-by-combined-adipose-derived-mesenchymal-stem-cells-and-preactivated-disaggregated-platelets
#20
Chih-Hung Chen, Yung-Lung Chen, Pei-Hsun Sung, Cheuk-Kwan Sun, Kuan-Hung Chen, Yi-Ling Chen, Tien-Hung Huang, Hung-I Lu, Fan-Yen Lee, Jiunn-Jye Sheu, Sheng-Ying Chung, Mel S Lee, Hon-Kan Yip
This study assessed whether combining adipose-derived mesenchymal stem cells (ADMSC) with preactivated, disaggregated shape-changed platelets (PreD-SCP) was superior to either therapy alone for protecting rat lung from acute respiratory distress syndrome (ARDS) complicated by sepsis. ARDS and sepsis were induced through 100% oxygen inhalation and peritoneal administration of 1.5 mg/kg lipopolysaccharide (LPS), respectively. Adult-male Sprague-Dawley rats (n=40) were randomized into sham-control (SC), ARDS-LPS, ARDS-LPS-ADMSC (1...
July 17, 2017: Oncotarget
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