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https://www.readbyqxmd.com/read/27920933/crystal-structure-of-1-3-bis-3-tert-butyl-2-hy-droxy-5-methyl-benz-yl-1-3-diazinan-5-ol-monohydrate
#1
Augusto Rivera, Ingrid Miranda-Carvajal, Jaime Ríos-Motta, Michael Bolte
In the title hydrate, C28H42N2O3·H2O, the central 1,3-diazinan-5-ol ring adopts a chair conformation with the two benzyl substituents equatorial and the lone pairs of the N atoms axial. The dihedral angle between the aromatic rings is 19.68 (38)°. There are two intra-molecular O-H⋯N hydrogen bonds, each generating an S(6) ring motif. In the crystal, classical O-H⋯O hydrogen bonds connect the 1,3-diazinane and water mol-ecules into columns extending along the b axis. The crystal structure was refined as a two-component twin with a fractional contribution to the minor domain of 0...
September 1, 2016: Acta Crystallographica. Section E, Crystallographic Communications
https://www.readbyqxmd.com/read/27919260/a-frameshift-mutation-in-mocos-is-associated-with-familial-renal-syndrome-xanthinuria-in-tyrolean-grey-cattle
#2
Leonardo Murgiano, Vidhya Jagannathan, Christian Piffer, Inmaculada Diez-Prieto, Marilena Bolcato, Arcangelo Gentile, Cord Drögemüller
BACKGROUND: Renal syndromes are occasionally reported in domestic animals. Two identical twin Tyrolean Grey calves exhibited weight loss, skeletal abnormalities and delayed development associated with kidney abnormalities and formation of uroliths. These signs resembled inherited renal tubular dysplasia found in Japanese Black cattle which is associated with mutations in the claudin 16 gene. Despite demonstrating striking phenotypic similarities, no obvious presence of pathogenic variants of this candidate gene were found...
December 5, 2016: BMC Veterinary Research
https://www.readbyqxmd.com/read/27918878/maternal-mental-health-over-the-course-of-four-years-following-childbirth-the-contribution-of-birth-circumstances-and-psycho-social-factors
#3
Ginna Porat-Zyman, Orit Taubman Ben-Ari, Iris Morag, Jacob Kuint
We aimed to identify mothers at risk for poorer maternal mental health (MMH) one month post-partum and to determine changes in MMH over four years in relation to birth circumstances (singleton/twins, full-term/pre-term infant/s, first/non-first child), internal resources (adult attachment styles), and external resources (marital quality and maternal grandmother's support) at one month post-partum. The mediating effects of external resources were also investigated. Questionnaires were completed between 2001 and 2012 by 561 Israeli mothers...
December 5, 2016: Women & Health
https://www.readbyqxmd.com/read/27918840/resilience-and-risk-for-alcohol-use-disorders-a-swedish-twin-study
#4
Elizabeth C Long, Sara L Lönn, Jianguang Ji, Paul Lichtenstein, Jan Sundquist, Kristina Sundquist, Kenneth S Kendler
BACKGROUND: Resilience has been shown to be protective against alcohol use disorders (AUDs), but the magnitude and nature of the relationship between these 2 phenotypes are not clear. The aim of this study was to examine the strength of this relationship and the degree to which it results from common genetic or common environmental influences. METHODS: Resilience was assessed on a 9-point scale during a personal interview in 1,653,721 Swedish men aged 17 to 25 years...
December 5, 2016: Alcoholism, Clinical and Experimental Research
https://www.readbyqxmd.com/read/27918299/monoclinic-to-orthorhombic-phase-transition-of-the-hexamethylenetetramine-2-methylbenzoic-acid-1-2-cocrystal-with-temperature-dependent-dynamic-molecular-disorder
#5
Tze Shyang Chia, Ching Kheng Quah
As a function of temperature, the hexamethylenetetramine-2-methylbenzoic acid (1/2) cocrystal, C6H12N4·2C8H8O2, undergoes a reversible structural phase transition. The orthorhombic high-temperature phase in the space group Pccn has been studied in the temperature range between 165 and 300 K. At 164 K, a t2 phase transition to the monoclinic subgroup P21/c space group occurs; the resulting twinned low-temperature phase was investigated in the temperature range between 164 and 100 K. The domains in the pseudomerohedral twin are related by a twofold rotation corresponding to the matrix (100/0-10/00-1...
December 1, 2016: Acta Crystallographica. Section C, Structural Chemistry
https://www.readbyqxmd.com/read/27917838/overcoming-a-hemihedral-twinning-problem-in-tetrahydrofolate-dependent-o-demethylase-crystals-by-the-microseeding-method
#6
Ayaka Harada, Yukari Sato, Naofumi Kamimura, Nagarajan Venugopalan, Eiji Masai, Toshiya Senda
A tetrahydrofolate-dependent O-demethylase, LigM, from Sphingobium sp. SYK-6 was crystallized by the hanging-drop vapour-diffusion method. However, the obtained P3121 or P3221 crystals, which diffracted to 2.5-3.3 Å resolution, were hemihedrally twinned. To overcome the twinning problem, microseeding using P3121/P3221 crystals as microseeds was performed with optimization of the reservoir conditions. As a result, another crystal form was obtained. The newly obtained crystal diffracted to 2.5-3.0 Å resolution and belonged to space group P21212, with unit-cell parameters a = 102...
December 1, 2016: Acta Crystallographica. Section F, Structural Biology Communications
https://www.readbyqxmd.com/read/27917753/less-is-more-in-hong-kong-investigation-of-biscriptal-and-trilingual-development-among-chinese-twins-in-a-relatively-small-city
#7
Simpson W L Wong, Connie Suk-Han Ho, Catherine McBride, Bonnie Wing-Yin Chow, Mary Miu Yee Waye
One salient characteristic of twin studies and the related behavioral genetics paradigm is the requirement of a large sample size. Countries or regions that are large in size and highly populated are at an advantage when implementing twin studies. However, given the fascinating and promising results obtained from twin studies, many researchers based in smaller countries or regions may still want to conduct twin studies in order to address local and theoretical issues. In this article, we have outlined the development of twin studies in Hong Kong, one of the Special Administrative Regions of China...
December 5, 2016: Twin Research and Human Genetics: the Official Journal of the International Society for Twin Studies
https://www.readbyqxmd.com/read/27917752/genetic-and-environmental-factors-in-invasive-cervical-cancer-design-and-methods-of-a-classical-twin-study
#8
Dorothy A Machalek, John D Wark, Sepehr N Tabrizi, John L Hopper, Minh Bui, Gillian S Dite, Alyssa M Cornall, Marian Pitts, Dorota Gertig, Bircan Erbas, Suzanne M Garland
BACKGROUND: Persistent high-risk human papillomavirus (HPV) infection is a necessary prerequisite for development of cervical cancer and its precursor lesion, high-grade squamous intraepithelial lesion (HSIL). However, HPV infection is not sufficient to drive this process, and genetic and environmental factors may also play a role. METHODS/DESIGN: The Cervical Cancer, Genetics and Environment Twin Study was established to investigate the environmental and genetic influences on variation in susceptibility to cervical pre-cancer in 25- to 69-year-old monozygotic (MZ) and dizygotic (DZ) twins recruited through the Australian Twin Registry...
December 5, 2016: Twin Research and Human Genetics: the Official Journal of the International Society for Twin Studies
https://www.readbyqxmd.com/read/27917730/social-and-economic-consequences-of-alcohol-use-disorder-a-longitudinal-cohort-and-co-relative-analysis
#9
K S Kendler, H Ohlsson, K J Karriker-Jaffe, J Sundquist, K Sundquist
BACKGROUND: Although alcohol use disorder (AUD) is associated with future risk for psychosocial dysfunction, the degree to which this arises from a direct causal effect of AUD on functioning v. from correlated risk factors (also known as confounders) is less clearly established. METHOD: AUD was assessed from Swedish medical, criminal and pharmacy registries. In a large general population cohort, using Cox proportional hazard and regression models, we predicted from the onset of AUD four outcomes: early retirement, unemployment, social assistance, and individual income...
December 5, 2016: Psychological Medicine
https://www.readbyqxmd.com/read/27917475/tipping-points-curvilinear-associations-between-activity-level-and-mental-development-in-toddlers
#10
Megan Flom, Madeleine Cohen, Kimberly J Saudino
BACKGROUND: The Theory of Optimal Stimulation (Zentall & Zentall, Psychological Bulletin, 94, 1983, 446) posits that the relation between activity level (AL) and cognitive performance follows an inverted U shape where midrange AL predicts better cognitive performance than AL at the extremes. METHODS: We explored this by fitting linear and quadratic models predicting mental development from AL assessed via multiple methods (parent ratings, observations, and actigraphs) and across multiple situations (laboratory play, laboratory test, home) in over 600 twins (2- and 3-year olds)...
December 5, 2016: Journal of Child Psychology and Psychiatry, and Allied Disciplines
https://www.readbyqxmd.com/read/27917470/a-harsh-parenting-team-maternal-reports-of-coparenting-and-coercive-parenting-interact-in-association-with-children-s-disruptive-behaviour
#11
Rachel M Latham, Katharine M Mark, Bonamy R Oliver
BACKGROUND: Parenting and coparenting are both important for children's adjustment, but their interaction has been little explored. Using a longitudinal design and considering two children per family, we investigated mothers' and fathers' perceptions of coparenting as moderators of associations between their coercive parenting and children's disruptive behaviour. METHODS: Mothers and fathers from 106 'intact' families were included from the Twins, Family and Behaviour study...
December 5, 2016: Journal of Child Psychology and Psychiatry, and Allied Disciplines
https://www.readbyqxmd.com/read/27916985/the-obese-brain-as-a-heritable-phenotype-a-combined-morphometry-and-twin-study
#12
C M Weise, P Piaggi, M Reinhardt, K Chen, C R Savage, J Krakoff, B Pleger
BACKGROUND: Body weight and adiposity are heritable traits. To date it remains unknown whether obesity-associated brain structural alterations are under a similar level of genetic control. METHODS: For this study we utilized magnetic resonance imaging (MRI) data from the Human Connectome Project. Voxel based morphometry (VBM) was used to investigate associations between body mass index (BMI) and regional gray matter volume (GMV) in a sample of 875 young adults with a wide BMI range (386m/489f; age 28...
December 5, 2016: International Journal of Obesity: Journal of the International Association for the Study of Obesity
https://www.readbyqxmd.com/read/27916700/elucidation-and-visualization-of-solid-state-transformation-and-mixing-in-a-pharmaceutical-mini-hot-melt-extrusion-process-using-in-line-raman-spectroscopy
#13
Jeroen Van Renterghem, Ashish Kumar, Chris Vervaet, Jean Paul Remon, Ingmar Nopens, Yvan Vander Heyden, Thomas De Beer
Mixing of raw materials (drug+polymer) in the investigated mini pharma melt extruder is achieved by using co-rotating conical twin screws and an internal recirculation channel. In-line Raman spectroscopy was implemented in the barrels, allowing monitoring of the melt during processing. The aim of this study was twofold: to investigate (I) the influence of key process parameters (screw speed - barrel temperature) upon the product solid-state transformation during processing of a sustained release formulation in recirculation mode; (II) the influence of process parameters (screw speed - barrel temperature - recirculation time) upon mixing of a crystalline drug (tracer) in an amorphous polymer carrier by means of residence time distribution (RTD) measurements...
December 1, 2016: International Journal of Pharmaceutics
https://www.readbyqxmd.com/read/27916207/integrating-insulin-into-single-step-culture-medium-regulates-human-embryo-development-in%C3%A2-vitro
#14
Mohamed Fawzy, Mohamed Sabry, Mohamed Nour, Mohamed Y Abdelrahman, Eman Roshdy, Yasmin Magdi, Hazem Abdelghafar
OBJECTIVE: To evaluate the effect of supplementing single-step embryo culture medium with insulin on human embryo development. DESIGN: Comparative study. SETTING: Two private centers. PATIENT(S): The study involved a sibling oocyte split of 5,142 retrieved oocytes from 360 patients. INTERVENTION(S): Sibling oocytes split after intracytoplasmic sperm injection for culture from day 0 through day 5 or 6 in insulin-supplemented or control medium...
December 1, 2016: Fertility and Sterility
https://www.readbyqxmd.com/read/27915496/cervical-pessary-for-preventing-preterm-birth-in-twin-pregnancies-with-short-cervical-length-a-systematic-review-and-meta-analysis
#15
Gabriele Saccone, Andrea Ciardulli, Serena Xodo, Lorraine Dugoff, Jack Ludmir, Francesco D'Antonio, Simona Boito, Elena Olearo, Carmela Votino, Giuseppe Maria Maruotti, Giuseppe Rizzo, Pasquale Martinelli, Vincenzo Berghella
OBJECTIVE: To evaluate the effectiveness of cervical pessary for preventing spontaneous preterm birth (SPTB) in twin pregnancies with an asymptomatic transvaginal ultrasound cervical length (TVU CL) in the second trimester Methods: We performed a meta-analysis including all randomized clinical trials (RCTs) comparing the use of cervical pessary (i.e. intervention group) with expectant management (i.e. control group). The primary outcome was incidence of SPTB <34 weeks. RESULTS: Three trials, including 481 twin pregnancies with short cervix, were analyzed...
December 5, 2016: Journal of Maternal-fetal & Neonatal Medicine
https://www.readbyqxmd.com/read/27915495/placental-respiratory-chain-complex-activities-in-high-risk-pregnancies
#16
Mojtaba Beyramzadeh, Zeliha Gunnur Dikmen, Nergiz K Erturk, Zafer Selcuk Tuncer, Filiz Akbiyik
OBJECTIVES: Mitochondrial oxidative phosphorylation is the key energy source for placental functions and fetal growth. The purpose of this study was to investigate the function of placenta in high risk pregnancies by measuring mitochondrial respiratory chain complex (RCC) activities, and to evaluate the correlation between double test risk ratio and RCC activities. METHODS: The placenta samples were collected from 50 pregnant women. The controls consisted of 20 normal uncomplicated pregnancies and the study group (n = 30) consisted of preeclampsia (PE), intrauterin growth restriction (IUGR), advanced maternal age (AMA), twins and preterm deliveries...
December 5, 2016: Journal of Maternal-fetal & Neonatal Medicine
https://www.readbyqxmd.com/read/27915155/vertically-oriented-structure-and-its-fracture-behavior-of-the-indonesia-white-pearl-oyster
#17
Guowei Chen, Hongyun Luo, Shunfei Luo, Zhenying Lin, Yue Ma
Structural calcites, aragonites, and the bonding organic network decide the growth, structure and mechanical properties of the mollusk bivalvia shell. Here, it was found out that the calcite prisms together with the coated organics construct another kind of 'brick and mortar' structure similar to the aragonite tablets. The calcite layer can be divided into three sublayers and direct evidences show that the calcite prisms are produced by two methods: nucleation and growing in the first sublayer; or fusing from the aragonites, which is quite different from some previous reports...
November 3, 2016: Journal of the Mechanical Behavior of Biomedical Materials
https://www.readbyqxmd.com/read/27914776/seasonal-variability-of-equilibrium-factor-and-unattached-fractions-of-radon-and-thoron-in-different-regions-of-punjab-india
#18
Komal Saini, Parminder Singh, Prabhjot Singh, B S Bajwa, B K Sahoo
A survey was conducted to estimate equilibrium factor and unattached fractions of radon and thoron in different regions of Punjab state, India. Pin hole based twin cup dosimeters and direct progeny sensor techniques have been utilized for estimation of concentration level of radon, thoron and their progenies. Equilibrium factor calculated from radon, thoron and their progenies concentration has been found to vary from 0.15 to 0.80 and 0.008 to 0.101 with an average value of 0.44 and 0.036 for radon and thoron respectively...
November 30, 2016: Journal of Environmental Radioactivity
https://www.readbyqxmd.com/read/27914200/assembling-the-tat-protein-translocase
#19
Felicity Alcock, Phillip J Stansfeld, Hajra Basit, Johann Habersetzer, Matthew Ab Baker, Tracy Palmer, Mark I Wallace, Ben C Berks
The twin-arginine protein translocation system (Tat) transports folded proteins across the bacterial cytoplasmic membrane and the thylakoid membranes of plant chloroplasts. The Tat transporter is assembled from multiple copies of the membrane proteins TatA, TatB, and TatC. We combine sequence co-evolution analysis, molecular simulations, and experimentation to define the interactions between the Tat proteins of Escherichia coli at molecular-level resolution. In the TatBC receptor complex the transmembrane helix of each TatB molecule is sandwiched between two TatC molecules, with one of the inter-subunit interfaces incorporating a functionally important cluster of interacting polar residues...
December 3, 2016: ELife
https://www.readbyqxmd.com/read/27914134/association-between-lumbar-bone-mineral-density-and-carotid-intima-media-thickness-in-korean-adults-a-cross-sectional-study-of-healthy-twin-study
#20
Jinyoung Shin, Joo Hyun Park, Yun Mi Song, Kayoung Lee, Joohon Sung
Bone mineral density (BMD) has been suggested to be associated with atherosclerosis. In the present study, we evaluated the association between lumbar BMD and the segments of carotid intima-media thickness (CIMT), a surrogate marker of subclinical atherosclerosis, in Korean adults, with consideration of sex and menopause status. Among 1,679 Korean adults who enrolled in a Healthy Twin Study, 723 men, 690 premenopausal women, and 266 postmenopausal women measured the CIMT at the common carotid artery intima-media thickness (CCA-IMT), carotid bifurcation intima-media thickness (BIF-IMT), internal carotid artery intima-media thickness (ICA-IMT) using B-mode ultrasound and lumbar BMD using dual-energy X-ray absorptiometry...
January 2017: Journal of Korean Medical Science
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