keyword
https://read.qxmd.com/read/32737908/attempts-to-synthesize-a-thiirane-selenirane-and-thiirene-by-dealkylation-of-chalcogeniranium-and-thiirenium-salts
#1
Helmut Poleschner, Konrad Seppelt
Thiiranium salts [Ad 2 SR] + X - ( 5 , 8 , 9 , 11 , 12 ) (X - = Tf 2 N - (Tf=CF 3 SO 2 ), SbCl 6 - ) and seleniranium salts [Ad 2 SeR] + X - ( 14 , 16 , 17 , 23 - 25 ) (X - = Tf 2 N - , BF 4 - , CHB 11 Cl 11 - , SbCl 6 - ) are synthetized from strained alkene bis(adamantylidene) ( 1 ). The disulfides and the diselenides (Me 3 SiCH 2 CH 2 E) 2 ( 4 , 13 ), ( t BuMe 2 SiCH 2 CH 2 E) 2 ( 7 , 22 ), and (NCCH 2 CH 2 E) 2 ( 10 , 15 ) (E = S, Se) have been used. The thiirenium salts [ t Bu 2 C 2 SR] + X - ( 34 ) and [Ad 2 C 2 SR] + X - ( 35 , 36 ) are prepared from the bis- tert- butylacetylene ( 2 ) and bis-adamantyl-acetylene ( 3 ) with R = Me 3 SiCH 2 CH 2 and t BuMe 2 SiCH 2 CH 2 ...
July 31, 2020: Chemistry: a European Journal
https://read.qxmd.com/read/32737529/the-bone-attachments-of-the-medial-collateral-and-posterior-oblique-ligaments-are-defined-anatomically-and-radiographically
#2
K K Athwal, L Willinger, S Shinohara, S Ball, A Williams, Andrew A Amis
PURPOSE: To define the bony attachments of the medial ligaments relative to anatomical and radiographic bony landmarks, providing information for medial collateral ligament (MCL) surgery. METHOD: The femoral and tibial attachments of the superficial MCL (sMCL), deep MCL (dMCL) and posterior oblique ligament (POL), plus the medial epicondyle (ME) were defined by radiopaque staples in 22 knees. These were measured radiographically and optically; the precision was calculated and data normalised to the sizes of the condyles...
July 31, 2020: Knee Surgery, Sports Traumatology, Arthroscopy
https://read.qxmd.com/read/32735739/is-relative-growth-by-the-mammalian-heart-biphasic-or-monophasic
#3
Gary C Packard
I re-examined data for relative growth by the heart in four species of mammal to reconcile divergent reports that appear in the literature. Raw data for heart and body mass for Horro sheep, humans, gray kangaroos, and tammar wallabies were studied by linear and nonlinear regression, thereby enabling me to avoid the confounding effects of logarithmic transformation and to evaluate multiple statistical models for describing pattern in each set of observations. My analyses indicate that relative growth by the heart is monophasic in all four species and either isometric or near isometric on the arithmetic scale...
July 31, 2020: Journal of Anatomy
https://read.qxmd.com/read/32735382/enantiomerically-pure-constrained-geometry-complexes-of-the-rare-earth-metals-featuring-a-dianionic-n-donor-functionalised-pentadienyl-ligand-synthesis-and-characterisation
#4
Marc D Walter, Katharina Münster, Ann Christin Fecker, Jan Raeder, Matthias Freytag, Peter G Jones
We report the preparation of enantiomerically pure constrained geometry complexes ( cgc ) of the rare-earth metals bearing a pentadienyl moiety (pdl) derived from the natural product (1 R )-(-)-myrtenal. The potassium salt 1 , [Kpdl*], was treated with ClSiMe 2 NH t Bu, and the resulting pentadiene 2 was deprotonated with the Schlosser -type base KO t Pen/ n -BuLi ( t Pen = CMe 2 (CH 2 Me)) to yield the dipotassium salt [K 2 (pdl*SiMe 2 N t Bu)] ( 3 ). However, 3 rearranges in THF solution to its isomer 3' by a 1,3-H shift, which elongates the bridge between the pdl and SiMe 2 N t Bu moieties by one CH 2 unit...
July 31, 2020: Chemistry: a European Journal
https://read.qxmd.com/read/32735172/embelin-modulates-metabolic-endotoxemia-and-associated-obesity-in-high-fat-diet-fed-c57bl-6-mice
#5
P Bansal, U Bhandari, K Sharma, P Arya
The present study was designed to investigate the effect of embelin in metabolic endotoxemia (ME) mediated inflammation and associated obesity in high fat diet (HFD)-fed C57BL/6 mice. The molecular docking of embelin confirms its binding with the toll-like receptor-4 (TLR-4). In vivo study, mice were treated with HFD for 8 weeks to induce ME mediated inflammation and associated obesity. Further, mice were treated with embelin (50 and 100 mg/kg/day, p.o.) and orlistat (10 mg/kg/day, p.o.) from 5th to 8th week along with HFD to improve associated changes...
July 31, 2020: Human & Experimental Toxicology
https://read.qxmd.com/read/32734826/utilization-of-morchella-esculenta-mediated-green-synthesis-golden-nanoparticles-in-biomedicine-applications
#6
Hilal Acay
This study aimed to synthesize gold nanoparticles (AuNPs) by hot water extract in room conditions using edible Morchella esculenta (ME) and investigate the bioactive properties of the synthesized Morchella esculenta -based gold nanoparticles (ME-AuNPs). The characterization of the biologically synthesized ME-AuNPs was made using the ultraviolet-visible spectrophotometry, X-ray crystallography, scanning electron microscopy, Fourier transforms infrared spectroscopy, and energy dispersive X-ray spectrum methods...
July 31, 2020: Preparative Biochemistry & Biotechnology
https://read.qxmd.com/read/32734032/effects-of-water-restriction-on-feed-intake-digestion-and-energy-utilization-by-mature-female-st-croix-sheep
#7
A H Hussein, R Puchala, T A Gipson, D Tadesse, B K Wilson, A L Goetsch
Eleven St. Croix ewes (46.9 ± 1.59 kg BW and 3.6 ± 0.67 yr age) were used in a crossover design to evaluate effects of restricted drinking water availability on intake of a 50% concentrate diet, digestion, and energy utilization. After 2 wk to determine ad libitum water consumption, there were two 4-wk periods, with measures in metabolism cages during wk 4. One treatment was water offered at the ad libitum level (CONT) and the other entailed a 25% reduction in wk 1 and 50% thereafter (REST). Although, some water was refused in wk 4, with intake of 2556 and 1707 g/day for CONT and REST, respectively (SEM=170...
December 2020: Veterinary and Animal Science
https://read.qxmd.com/read/32733779/excitonic-and-electronic-transitions-in-me-sb-2-se-3-structures
#8
Nicolae N Syrbu, Victor V Zalamai, Ivan G Stamov, Stepan I Beril
The optical anisotropy of the Sb2 Se3 crystals was investigated at 300 and 11 K. Excitonic features of four excitons (A, B, C, and D) were observed in the optical spectra of the Sb2 Se3 single crystals and in the photoelectric spectra of the Me-Sb2 Se3 structures. The exciton parameters, such as the ground ( n = 1) and excited ( n = 2) state positions and the binding energy (Ry), were determined. The effective mass of the electrons at the bottom of the conduction band ( m c * = 0.67 m 0 ) as well as the holes at the four top valence bands ( m v1 * = 3...
2020: Beilstein Journal of Nanotechnology
https://read.qxmd.com/read/32733493/light-not-age-underlies-the-maladaptation-of-maize-and-miscanthus-photosynthesis-to-self-shading
#9
Robert F Collison, Emma C Raven, Charles P Pignon, Stephen P Long
Zea mays and Miscanthus × giganteus use NADP-ME subtype C4 photosynthesis and are important food and biomass crops, respectively. Both crops are grown in dense stands where shaded leaves can contribute a significant proportion of overall canopy productivity. This is because shaded leaves, despite intercepting little light, typically process light energy very efficiently for photosynthesis, when compared to light-saturated leaves at the top of the canopy. However, an apparently maladaptive loss in photosynthetic light-use efficiency as leaves become shaded has been shown to reduce productivity in these two species...
2020: Frontiers in Plant Science
https://read.qxmd.com/read/32733436/tmem16f-aggravates-neuronal-loss-by-mediating-microglial-phagocytosis-of-neurons-in-a-rat-experimental-cerebral-ischemia-and-reperfusion-model
#10
Yijie Zhang, Haiying Li, Xiang Li, Jie Wu, Tao Xue, Jiang Wu, Haitao Shen, Xiang Li, Meifen Shen, Gang Chen
Cerebral ischemia is a severe, acute condition, normally caused by cerebrovascular disease, and results in high rates of disability, and death. Phagoptosis is a newly recognized form of cell death caused by phagocytosis of viable cells, and has been reported to contribute to neuronal loss in brain tissue after ischemic stroke. Previous data indicated that exposure of phosphatidylserine to viable neurons could induce microglial phagocytosis of such neurons. Phosphatidylserine can be reversibly exposed to viable cells as a result of a calcium-activated phospholipid scramblase named TMEM16F...
2020: Frontiers in Immunology
https://read.qxmd.com/read/32732786/impact-of-the-aca-medicaid-expansion-on-utilization-of-mental-health-care
#11
Joshua Breslau, Bing Han, Julie Lai, Hao Yu
BACKGROUND: The Affordable Care Act's Medicaid expansions (ME) increased insurance coverage for low-income Americans, among whom unmet need for mental health care is high. Empirical evidence regarding the impact of expanding insurance coverage on use of mental health services among low income and minority populations is lacking. METHODS: Data on mental health service use collected between 2007 and 2015 by the Medical Expenditures Panel Survey from nationally representative cross-sectional samples of low income (income<138% of the federal poverty line) adults were analyzed...
July 23, 2020: Medical Care
https://read.qxmd.com/read/32732335/undetectable-equals-untransmittable-u-u-awareness-and-associations-with-health-outcomes-among-people-living-with-hiv-in-25-countries
#12
Chinyere Okoli, Nicolas Van de Velde, Bruce Richman, Brent Allan, Erika Castellanos, Benjamin Young, Garry Brough, Anton Eremin, Giulio Maria Corbelli, Marta Mc Britton, W David Hardy, Patricia de Los Rios
OBJECTIVES: 'Undetectable equals Untransmittable' (U=U) is an empowering message that may enable people living with HIV (PLHIV) to reach and maintain undetectability. We estimated the percentage of PLHIV who ever discussed U=U with their main HIV care provider, and measured associations with health-related outcomes. Secondarily, we evaluated whether the impact of the U=U message varied between those who heard it from their healthcare provider (HCP) vs from elsewhere. METHODS: Data were from the 25-country 2019 Positive Perspectives Survey of PLHIV on treatment (n=2389)...
July 30, 2020: Sexually Transmitted Infections
https://read.qxmd.com/read/32732166/monitoring-canine-myocardial-infarction-formation-and-recovery-via-transthoracic-cardiac-strain-imaging
#13
Vincent Sayseng, Rebecca A Ober, Christopher S Grubb, Rachel A Weber, Elisa Konofagou
Myocardial elastography (ME) is an ultrasound-based strain imaging method that aims to determine the degree of ischemia or infarction as a result of the change in the elastic properties of the myocardium. A survival canine model (n = 11) was employed to investigate the ability of ME to image myocardial infarction formation and recovery. Infarcts were generated by ligation of the left anterior descending coronary artery. Canines were survived and imaged for 4 days (n = 7) or 4 weeks (n = 4), allowing sufficient time for recovery via collateral perfusion...
July 27, 2020: Ultrasound in Medicine & Biology
https://read.qxmd.com/read/32731986/titration-of-supplemental-bacillus-subtilis-subsp-subtilis-american-type-culture-collection-pta-125135-to-broiler-chickens-fed-diets-of-2-different-metabolizable-energy-concentrations
#14
L A Krueger, D A Spangler, M D Sims
Bacillus subtilis subsp. subtilis American Type Culture Collection deposit number PTA-125135 has recently been studied by our laboratory as a potential probiotic strain for avian species. The objective of the present study was to evaluate growth performance and feed efficiency in broiler chickens in response to a dose titration of the Bacillus strain in feed. In addition to a nonsupplemented control, Bacillus spores were supplemented into broiler chicken diets at 4 levels, which were 8.1 × 104 , 1.6 × 105 , 2...
August 2020: Poultry Science
https://read.qxmd.com/read/32731919/risk-factors-for-non-participation-in-a-universal-developmental-surveillance-program-in-a-population-in-australia
#15
Chandra Ayer, Valsamma Eapen, Bronwyn Overs, Joseph Descallar, Bin Jalaludin, John Graeme Eastwood, Cheryl Dissanayake, Katrina Williams, Elisabeth Murphy, Susan Woolfenden
Objectives This study examined the risk factors for non-participation in a developmental surveillance program in a population in south-west Sydney with a high proportion of culturally diverse and socioeconomically disadvantaged people. Methods Data from 850 and 625 12- and 18-month-old children respectively from the Watch Me Grow (WMG) birth cohort were used for this study. Logistic regression models were used to assess risk factors for 12- and 18-month non-attendance at Well Child Visits, as well as non-completion of the developmental surveillance questionnaire Parents' Evaluation of Developmental Status (PEDS) in the child's personal health record (PHR)...
July 31, 2020: Australian Health Review: a Publication of the Australian Hospital Association
https://read.qxmd.com/read/32731499/effect-of-metal-ligand-coordination-complexes-on-molecular-dynamics-and-structure-of-cross-linked-poly-dimethylosiloxane
#16
Angelika Wrzesińska, Izabela Bobowska, Paulina Maczugowska, Joanna Małolepsza, Katarzyna M Błażewska, Aleksandra Wypych-Puszkarz
Poly(dimethylosiloxane) (PDMS) cross-linked by metal-ligand coordination has a potential functionality for electronic devices applications. In this work, the molecular dynamics of bipyridine (bpy)-PDMS-MeCl2 (Me: Mn2+ , Fe2+ , Ni2+ , and Zn2+ ) are investigated by means of broadband dielectric spectroscopy and supported by differential scanning calorimetry and density functional theory calculations. The study of molecular motions covered a broad range of temperatures and frequencies and was performed for the first time for metal-ligand cross-linked PDMS...
July 28, 2020: Polymers
https://read.qxmd.com/read/32730774/role-of-metal-cations-and-oxyanions-in-the-regulation-of-protein-arginine-phosphatase-activity-of-ywle-from-bacillus-subtilis
#17
Biling Huang, Zhixing Zhao, Chenyang Huang, Mingxiao Zhao, Yumeng Zhang, Yan Liu, Xinli Liao, Shaohua Huang, Yufen Zhao
Protein arginine phosphorylation (pArg) is a relatively novel posttranslational modification. Protein arginine phosphatase YwlE negatively regulates arginine phosphorylation and consequently induces the expression of stress-response genes that are crucial for bacterial stress tolerance and pathogenic homolog Staphylococcus aureus virulence. However, little is known about the factors that affect the enzymatic activity of YwlE with the exception of the effect of oxidative stress. Herein, based on the hydrolysis of the chromogenic substrate p-nitrophenyl phosphate (pNPP) by YwlE, we investigate the role of metal cations and oxyanions in the regulation of YwlE activity...
July 27, 2020: Biochimica et Biophysica Acta. General Subjects
https://read.qxmd.com/read/32730723/medicaid-expansion-health-insurance-coverage-and-cost-barriers-to-care-among-low-income-adults-with-asthma-the-adult-asthma-call-back-survey
#18
Joy Hsu, Xiaoting Qin, Maria C Mirabelli, W Dana Flanders
Objective: To examine Medicaid expansion (ME) effects on health insurance coverage (HIC) and cost barriers to medical care among people with asthma. Method : We analyzed 2012-2013 and 2015-2016 data from low-income adults with current asthma aged 18-64 years in the Behavioral Risk Factor Surveillance System Asthma Call-Back Survey (state-level telephone survey). We calculated weighted percentages and 95% confidence intervals from ME and non-ME jurisdictions (according to 2014 ME status). Outcomes were HIC and cost barriers to buying asthma medication (MED), seeing a health care provider for asthma (HCP), or any asthma care (AAC)...
July 30, 2020: Journal of Asthma
https://read.qxmd.com/read/32730661/a-new-deep-convolutional-neural-network-design-with-efficient-learning-capability-application-to-ct-image-synthesis-from-mri
#19
Abass Bahrami, Alireza Karimian, Emad Fatemizadeh, Hossein Arabi, Habib Zaidi
PURPOSE: Despite the proven utility of multiparametric magnetic resonance imaging (MRI) in radiation therapy, MRI-guided radiation treatment planning is limited by the fact that MRI does not directly provide the electron density map required for absorbed dose calculation. In this work, a new deep convolutional neural network model with efficient learning capability, suitable for applications where the number of training subjects is limited, is proposed to generate accurate synthetic CT (sCT) images from MRI...
July 30, 2020: Medical Physics
https://read.qxmd.com/read/32730410/teaching-practices-and-beliefs-and-language-stimulation-from-the-mapuche-culture-in-rural-children-in-the-araucan%C3%A3-a-region
#20
Francisca Fernández Gutiérrez, Ana María Alarcón Muñoz
INTRODUCTION: Language is one of the most relevant cognitive tasks in child development and its acquisition is me diated, among others, by ethnic and cultural factors. OBJECTIVE: To characterize the practices and be liefs about language teaching and stimulation strategies of rural Mapuche Children aged between 0 to 4 years from an intracultural perspective. SUBJECTS AND METHOD: Qualitative study based on Groun ded Theory, which generates an understanding of the study issue from the perceptions of the research subjects...
February 2020: Revista Chilena de Pediatría
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