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https://www.readbyqxmd.com/read/29145606/-prokaryotic-pathway-is-not-prokaryotic-non-cyanobacterial-origin-of-the-chloroplast-lipid-biosynthetic-pathway-revealed-by-comprehensive-phylogenomic-analysis
#1
Naoki Sato, Koichiro Awai
Lipid biosynthesis within the chloroplast, or more generally plastids, was conventionally called "prokaryotic pathway", which produces glycerolipids bearing C18 acids at the sn-1 position and C16 acids at the sn-2 position, as in cyanobacteria such as Anabaena and Synechocystis. This positional specificity is determined during the synthesis of phosphatidate, which is a precursor to diacylglycerol, the acceptor of galactose for the synthesis of galactolipids. The first acylation at sn-1 is catalyzed by glycerol-3-phosphate acyltransferase (GPAT or GPT), whereas the second acylation at sn-2 is performed by lysophosphatidate acyltransferase (LPAAT, AGPAT or PlsC)...
November 14, 2017: Genome Biology and Evolution
https://www.readbyqxmd.com/read/29145497/rare-genetic-variants-in-the-endocannabinoid-system-genes-cnr1-and-dagla-are-associated-with-neurological-phenotypes-in-humans
#2
Douglas R Smith, Christine M Stanley, Theodore Foss, Richard G Boles, Kevin McKernan
Rare genetic variants in the core endocannabinoid system genes CNR1, CNR2, DAGLA, MGLL and FAAH were identified in molecular testing data from 6,032 patients with a broad spectrum of neurological disorders. The variants were evaluated for association with phenotypes similar to those observed in the orthologous gene knockouts in mice. Heterozygous rare coding variants in CNR1, which encodes the type 1 cannabinoid receptor (CB1), were found to be significantly associated with pain sensitivity (especially migraine), sleep and memory disorders-alone or in combination with anxiety-compared to a set of controls without such CNR1 variants...
2017: PloS One
https://www.readbyqxmd.com/read/29145447/from-bead-to-rod-comparison-of-theories-by-measuring-translational-drag-coefficients-of-micron-sized-magnetic-bead-chains-in-stokes-flow
#3
Kaiyuan Yang, Chen Lu, Xiaodan Zhao, Ryo Kawamura
Frictional drag force on an object in Stokes flow follows a linear relationship with the velocity of translation and a translational drag coefficient. This drag coefficient is related to the size, shape, and orientation of the object. For rod-like objects, analytical solutions of the drag coefficients have been proposed based on three rough approximations of the rod geometry, namely the bead model, ellipsoid model, and cylinder model. These theories all agree that translational drag coefficients of rod-like objects are functions of the rod length and aspect ratio, but differ among one another on the correction factor terms in the equations...
2017: PloS One
https://www.readbyqxmd.com/read/29145413/diffusion-based-neuromodulation-can-eliminate-catastrophic-forgetting-in-simple-neural-networks
#4
Roby Velez, Jeff Clune
A long-term goal of AI is to produce agents that can learn a diversity of skills throughout their lifetimes and continuously improve those skills via experience. A longstanding obstacle towards that goal is catastrophic forgetting, which is when learning new information erases previously learned information. Catastrophic forgetting occurs in artificial neural networks (ANNs), which have fueled most recent advances in AI. A recent paper proposed that catastrophic forgetting in ANNs can be reduced by promoting modularity, which can limit forgetting by isolating task information to specific clusters of nodes and connections (functional modules)...
2017: PloS One
https://www.readbyqxmd.com/read/29145395/positive-valence-music-restores-executive-control-over-sustained-attention
#5
Carryl L Baldwin, Bridget A Lewis
Music sometimes improves performance in sustained attention tasks. But the type of music employed in previous investigations has varied considerably, which can account for equivocal results. Progress has been hampered by lack of a systematic database of music varying in key characteristics like tempo and valence. The aims of this study were to establish a database of popular music varying along the dimensions of tempo and valence and to examine the impact of music varying along these dimensions on restoring attentional resources following performance of a sustained attention to response task (SART) vigil...
2017: PloS One
https://www.readbyqxmd.com/read/29145254/individualized-prevention-against-hypertension-based-on-traditional-chinese-medicine-constitution-theory-a-large-community-based-retrospective-strobe-compliant-study-among-chinese-population
#6
Ying Li, Xiao-Hui Li, Xin Huang, Lu Yin, Cheng-Xian Guo, Chang Liu, Yong-Mei He, Xing Liu, Hong Yuan
Traditional Chinese Medicine Constitution (TCMC) theory states that individuals with a biased TCMC are more likely to suffer from specific diseases. However, little is known regarding the influence of TCMC on susceptibility to hypertension. The aim of this study is to examine the possible relationship between TCMC and hypertension. Retrospective evaluation and observation were performed using the STROBE guidelines checklist. A large community-based cross-sectional study was conducted between 2009 and 2013 in Changsha, China...
November 2017: Medicine (Baltimore)
https://www.readbyqxmd.com/read/29145209/methodological-issues-for-psychological-evaluation-across-the-lifespan-of-individuals-with-a-difference-disorder-of-sex-development
#7
Franco D'Alberton, Sofia Vissani, Chiara Ferracuti, Vickie Pasterski
The aim of the current report is to provide guidance relevant to psychological evaluation for healthcare providers and researchers working in the field of disorders of sexual development (DSD). In doing so, we give careful consideration to methodological issues and limitations that may influence the utility of investigations. For example, rarity and heterogeneity of DSD conditions restrict sample sizes when conducting evaluations aimed at establishing condition-specific psychological outcomes. At the same time, the potential for stigmatization by virtue of conducting psychological evaluations is particularly high given the fundamental contribution of sex and gender to one's sense of self and integrity...
November 17, 2017: Sexual Development: Genetics, Molecular Biology, Evolution, Endocrinology, Embryology, and Pathology of Sex Determination and Differentiation
https://www.readbyqxmd.com/read/29145130/photophysical-and-photochemical-insights-into-the-photodegradation-of-sulfapyridine-in-water-a-joint-experimental-and-theoretical-study
#8
Heming Zhang, Xiaoxuan Wei, Xuedan Song, Shaheen Shah, Jingwen Chen, Jianhui Liu, Ce Hao, Zhongfang Chen
For organic pollutants, photodegradation, as a major abiotic elimination process and of great importance to the environmental fate and risk, involves rather complicated physical and chemical processes of excited molecules. Herein, we systematically studied the photophysical and photochemical processes of a widely used antibiotic, namely sulfapyridine. By means of density functional theory (DFT) computations, we examined the rate constants and the competition of both photophysical and photochemical processes, elucidated the photochemical reaction mechanism, calculated reaction quantum yield (Φ) based on both photophysical and photochemical processes, and subsequently estimated the photodegradation rate constant...
October 7, 2017: Chemosphere
https://www.readbyqxmd.com/read/29145059/binding-of-naringin-and-naringenin-with-hen-egg-white-lysozyme-a-spectroscopic-investigation-and-molecular-docking-study
#9
Sourav Das, Pooja Ghosh, Sudipta Koley, Atanu Singha Roy
The interactions of naringenin (NG) and naringin (NR) with Hen Egg White Lysozyme (HEWL) in aqueous medium have been investigated using UV-vis spectroscopy, steady-state fluorescence, circular dichroism (CD), Fourier Transform infrared spectroscopy (FT-IR) and molecular docking analyses. Both NG and NR can quench the intrinsic fluorescence of HEWL via static quenching mechanism. At 300K, the value of binding constant (Kb) of HEWL-NG complex (5.596±0.063×10(4)M(-1)) was found to be greater than that of HEWL-NR complex (3...
November 8, 2017: Spectrochimica Acta. Part A, Molecular and Biomolecular Spectroscopy
https://www.readbyqxmd.com/read/29145002/different-transport-behaviors-of-bacillus-subtilis-cells-and-spores-in-saturated-porous-media-implications-for-contamination-risks-associated-with-bacterial-sporulation-in-aquifer
#10
Qi Li, Jiakuan Yang, Wei Fan, Dandan Zhou, Xiaoyu Wang, Leilei Zhang, Mingxin Huo, John C Crittenden
In this study, we compared the transport characteristics of Bacillus subtilis cells and their spores in saturated porous media. Both the bacteria cells and spores were readily transported under lower ionic strengths (IS) (1mM), featuring high mass recovery rates (>75%). The bacteria cells recovery rate declined to 58.05% when the IS increased to 100mM; but the spores recovery rate remained at 74.54%. Spores appear to be more mobile than bacterial cells over wide range of IS. Surface properties and breakthrough curves analysis of the two bio-particles (cells and spores) indicated that attachment, straining and blocking mechanisms contribute differently to deposition processes...
November 11, 2017: Colloids and Surfaces. B, Biointerfaces
https://www.readbyqxmd.com/read/29144997/examination-of-a-therapeutic-recreation-based-clinical-placement-for-undergraduate-nursing-students-a-self-determined-perspective
#11
Dana Perlman, Ellie Taylor, Lorna Moxham, Susan Sumskis, Christopher Patterson, Renee Brighton, Tim Heffernan
Nursing students across the globe are expected to undertake clinical placements. To date, there have been no studies that have examined the potential educational benefits for undergraduate nursing students engaged in a mental health clinical placement grounded in self-determination theory. The present study examined the experiences of undergraduate students engaged in a mental health clinical placement termed Recovery Camp. An ethnographic methodology within a case study approach was used. The researchers were immersed in the clinical placement, which took place at a YMCA camp facility...
November 10, 2017: Nurse Education in Practice
https://www.readbyqxmd.com/read/29144977/birthplace-in-australia-processes-and-interactions-during-the-intrapartum-transfer-of-women-from-planned-homebirth-to-hospital
#12
Deborah Fox, Athena Sheehan, Caroline Homer
OBJECTIVE: the aim of the study was to explore the views and experiences of women, midwives and obstetricians on the intrapartum transfer of women from planned homebirth to hospital in Australia. DESIGN: a Constructivist Grounded Theory approach was taken, to conceptualise the social interactions and processes grounded in the data. SETTING: urban and regional areas in four states of south-eastern Australia. PARTICIPANTS: semi-structured qualitative interviews were conducted with 36 women, midwives and obstetricians who had experienced an intrapartum homebirth transfer within three years prior to the interview...
November 2, 2017: Midwifery
https://www.readbyqxmd.com/read/29144882/adult-children-of-gay-fathers-parent-child-relationship-quality-and-mental-health
#13
Samantha L Tornello, Charlotte J Patterson
According to family systems theory, parent-child relationships are an important aspect of individual well-being. This study explored associations among parental disclosure, parent-child relationships, and well-being among 84 adult children with gay fathers. We explored associations between the adult children's well-being and the children's ages at sexual orientation disclosure, geographic distance, relationship quality and closeness with their fathers. We found that when parental disclosure had occurred earlier in the adult child's life, participants reported feeling closer to fathers in adulthood...
November 16, 2017: Journal of Homosexuality
https://www.readbyqxmd.com/read/29144848/watching-the-evolution-of-the-american-family-amazon-s-transparent-ecological-systems-theory-and-the-changing-dynamics-of-public-opinion
#14
Amy B Becker, Maureen E Todd
Using Bronfenbrenner's (1979) ecological systems theory as an organizing framework, the research closely examines the text of the Amazon Studios hit show, Transparent, and by extension the evolution of public opinion towards transgender individuals. By examining the Pfefferman family in detail and their related microsystem and macrosystem, we are able to closely unpack the transition of Jeffrey Tambor's character from Mort to Maura and the show's connections with broader developments in the Los Angeles LGBT community and the Jewish diaspora in postwar and contemporary Los Angeles...
November 16, 2017: Journal of Homosexuality
https://www.readbyqxmd.com/read/29144847/explaining-the-sexuality-gap-in-protest-participation
#15
Eric Swank
This study investigated the relationship between sexual orientations and the protest actions of adults in the United States. Drawing from General Social Survey data from 1996 to 2004, we found that lesbians, gays, and bisexuals were more than twice as likely to protest as heterosexuals. To account for this sexuality gap, we used Patrick Egan's (2008) political distinctiveness theories to identify possible underlying causes of these protesting differences. After running several regressions, we found that sexuality and protesting relationships were moderated by issues of educational attainment, marital statuses, metropolitan residencies, political partisanships, governmental grievances, and gender role expectations...
November 16, 2017: Journal of Homosexuality
https://www.readbyqxmd.com/read/29144793/interprofessional-collaboration-an-exploration-of-possible-prerequisites-for-successful-implementation
#16
Erik Vestergaard, Birgitte Nørgaard
Poor collaboration among professional groups may be a major cause of incoherent patient pathways in hospital settings. For over a decade, interprofessional collaboration (IPC) have been stressed as an effective method to enhance the delivery of patient care. This article presents a theory-based stakeholder evaluation of the implementation of an intervention aiming to implement the concept of IPC in a Danish regional hospital from 2012 to 2015. Involving five departments and eight professions, the intervention aimed at developing coherent practices across health professions by optimising patient pathways with the establishment of interprofessional teams as a core element...
November 16, 2017: Journal of Interprofessional Care
https://www.readbyqxmd.com/read/29144761/amphiphiles-without-head-and-tail-design-nanostructures-based-on-the-self-assembly-of-anionic-boron-cluster-compounds
#17
Roberto Fernandez-Alvarez, Vladimír Ďorďovič, Mariusz Uchman, Pavel Matejicek
Anionic boron hydride cluster compounds (ABCCs) are intrinsically amphiphilic building blocks suitable for nanochemistry. ABCCs are involved in atypical weak interactions, notably dihydrogen bonding, due to their peculiar polyhedral structure, consisting of negatively charged B-H units. The most striking feature of ABCCs that differentiates them from typical surfactants is the lack of head-and-tail structure. Furthermore, their structure can be described as intrinsically amphiphilic or aquaneutral. Therefore, classical terms established to describe self-assembly of classical amphiphiles are insufficient and need to be reconsidered...
November 16, 2017: Langmuir: the ACS Journal of Surfaces and Colloids
https://www.readbyqxmd.com/read/29144758/on-the-density-dependence-of-the-integral-equation-coarse-graining-effective-potential
#18
Mohammadhasan Dinpajooh, Marina Giuseppina Guenza
Coarse-graining (CG) procedures provide computationally efficient methods for investigating the corresponding long time- and length-scale processes. In the bottom-up approaches, the effective interactions between the CG sites is obtained using the information from the atomistic simulations, but reliable CG procedures are required to preserve the structure and thermodynamics. In this regard, the integral equation coarse-graining (IECG) method is a promising approach that uses the first-principles Ornstein-Zernike equation in liquid state theory to determine the effective potential between CG sites...
November 16, 2017: Journal of Physical Chemistry. B
https://www.readbyqxmd.com/read/29144744/partially-oxidized-sns2-atomic-layers-achieving-efficient-visible-light-driven-co2-reduction
#19
Xingchen Jiao, Xiaodong Li, Xiuyu Jin, Yongfu Sun, Jiaqi Xu, Liang Liang, Huanxin Ju, Junfa Zhu, Yang Pan, Wensheng Yan, Yue Lin, Yi Xie
Unraveling the role of surface oxide on affecting its native metal disulfide' CO2 photoreduction remains a grand challenge. Herein, we initially construct metal disulfide atomic layers and hence deliberately create oxidized domains on their surfaces. As an example, SnS2 atomic layers with different oxidation degrees are successfully synthesized. In situ FTIR spectra disclose the COOH* radical is the main intermediate, while density-functional-theory calculations reveal the COOH* formation is the rate-limiting step...
November 16, 2017: Journal of the American Chemical Society
https://www.readbyqxmd.com/read/29144733/a-mechanism-for-symmetry-breaking-and-shape-control-in-single-crystal-gold-nanorods
#20
Michael J Walsh, Wenming Tong, Hadas Katz-Boon, Paul Mulvaney, Joanne Etheridge, Alison M Funston
The phenomenon of symmetry breaking-in which the order of symmetry of a system is reduced despite manifest higher-order symmetry in the underlying fundamental laws-is pervasive throughout science and nature, playing a critical role in fields ranging from particle physics and quantum theory to cosmology and general relativity. For the growth of crystals, symmetry breaking is the crucial step required to generate a macroscopic shape that has fewer symmetry elements than the unit cell and/or seed crystal from which it grew...
November 16, 2017: Accounts of Chemical Research
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