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https://www.readbyqxmd.com/read/28820785/collective-efficacy-physical-activity-and-health-outcomes-among-mothers
#1
Deirdre Dlugonski, Bhibha M Das, Tiesha R Martin, Autumn Palmer
Motherhood is associated with low rates of physical activity that increase disease risk. Most theory-based approaches to increasing physical activity focus on personal rather than social factors. The purpose of this study was to examine the associations among perceptions of community collective efficacy and objectively measured physical activity, self-efficacy, social support, and health. Mothers completed questionnaires and wore a pedometer for 7 days. There was a significant, positive association between physical activity and collective efficacy-social cohesion subscale...
October 2017: Family & Community Health
https://www.readbyqxmd.com/read/28820252/computational-study-on-m1-pom-single-atom-catalysts-m-cu-zn-ag-and-au-pom-pw12o40-3-metal-support-interactions-and-catalytic-cycle-for-alkene-epoxidation
#2
Chun-Guang Liu, Meng-Xu Jiang, Zhong-Min Su
Geometrical structures, metal-support interactions, and infrared (IR) spectroscopy of a series of M1/POM (M = Cu, Zn, Ag, and Au; POM = [PW12O40](3-)) single-atom catalysts (SACs), and catalytic cycle for alkene epoxidation catalyzed by M1/POM SACs were studied using density functional theory (DFT) calculations. The calculations demonstrate that the most probable anchoring sties for the isolated single atoms studied here in the M1/POM SACs are the fourfold hollow sites on the surface of POM support. The bonding interaction between single metal atom and surface of POM support comes from the molecular orbitals with a mixture of d atomic orbital of metal and 2p group orbital of surface oxygen atoms of POM cage...
August 18, 2017: Inorganic Chemistry
https://www.readbyqxmd.com/read/28820222/quasi-zero-dimensional-cobalt-doped-ceo2-dots-on-pd-catalysts-for-alcohol-electro-oxidation-with-enhanced-poisoning-tolerance
#3
Qiang Tan, Haiyan Zhu, Shengwu Guo, Yuanzhen Chen, Tao Jiang, Chengyong Shu, Shaokun Chong, Benjamin Hultman, Yongning Liu, Gang Wu
Deactivation of an anode catalyst resulting from the poisoning of COad-like intermediates is one of the major problems for methanol and ethanol electro-oxidation reactions (MOR & EOR), and remains a grand challenge towards achieving high performance for direct alcohol fuel cells (DAFCs). Herein, we report a new approach for the preparation of ultrafine cobalt-doped CeO2 dots (Co-CeO2, d = 3.6 nm), which can be an effective anti-poisoning promoter for Pd catalysts towards MOR and EOR in alkaline media. Compared to Pd/CeO2 and pure Pd, the hybrid Pd/Co-CeO2 nanocomposite catalyst exhibited a much enhanced activity and remarkable anti-poisoning ability for both MOR and EOR...
August 18, 2017: Nanoscale
https://www.readbyqxmd.com/read/28820201/co2-electroreduction-performance-of-a-single-transition-metal-atom-supported-on-porphyrin-like-graphene-a-computational-study
#4
Zhongxu Wang, Jingxiang Zhao, Qinghai Cai
Searching for low-cost, efficient, and stable electrocatalysts for CO2 electroreduction (CO2ER) reactions is highly desirable for the reduction of CO2 emission and its conversion into useful products, but remains a great challenge. In this work, single transition metal atoms supported on porphyrin-like graphene catalysts, i.e., TMN4/graphene, acting as electrocatalysts for CO2 reduction were explored by means of comprehensive density functional theory (DFT) computations. Our results revealed that these anchored TM atoms possess high stability due to their strong hybridization with the unsaturated N atoms of the substrate and function as the active sites...
August 18, 2017: Physical Chemistry Chemical Physics: PCCP
https://www.readbyqxmd.com/read/28820016/why-we-stay-with-our-social-partners-neural-mechanisms-of-stay-leave-decision-making
#5
Amber Heijne, Filippo Rossi, Alan G Sanfey
How do we decide to keep interacting (e.g., stay) with a social partner or to switch (e.g., leave) to another? This paper investigated the neural mechanisms of stay/leave decision-making. We hypothesized that these decisions fit within a framework of value-based decision-making, and explored four potential mechanisms underlying a hypothesized bias to stay. Twenty-six participants underwent functional Magnetic Resonance Imaging (fMRI) while completing social and nonsocial versions of a stay/leave decision-making task...
August 18, 2017: Social Neuroscience
https://www.readbyqxmd.com/read/28819583/theoretical-study-of-ni-assisted-c-c-and-c-h-bond-activations-of-propionaldehyde-in-the-gas-phase
#6
Pei-Pei Zhao, Yong-Cheng Wang, Yang Sheng, Yi-Ming Jia
The reactions of Ni(+) with propionaldehyde in the gas phase have been systematically investigated using density functional theory at the B3LYP/def2-TZVP level. The decomposition reaction mechanism has been identified. Our calculations indicated that Ni(+) can assist decomposition of propionaldehyde to form Ni(+)CO and C2H6 through two types of reaction channel: C-C bond activation and C-H bond activation. In addition, charge decomposition analysis (CDA) was carried out to obtain a deeper understanding for orbital interaction of the initial complex...
August 15, 2017: Computational & Theoretical Chemistry
https://www.readbyqxmd.com/read/28818417/referral-for-expert-physical-activity-counseling-a-pragmatic-rct
#7
Erica L James, Ben D Ewald, Natalie A Johnson, Fiona G Stacey, Wendy J Brown, Elizabeth G Holliday, Mark Jones, Fan Yang, Charlotte Hespe, Ronald C Plotnikoff
INTRODUCTION: Primary care physicians are well placed to offer physical activity counseling, but insufficient time is a barrier. Referral to an exercise specialist is an alternative. In Australia, exercise specialists are publicly funded to provide face-to-face counseling to patients who have an existing chronic illness. This trial aimed to (1) determine the efficacy of primary care physicians' referral of insufficiently active patients for counseling to increase physical activity, compared with usual care, and (2) compare the efficacy of face-to-face counseling with counseling predominantly via telephone...
August 14, 2017: American Journal of Preventive Medicine
https://www.readbyqxmd.com/read/28818252/origins-of-cancer-disparities-in-young-adults-logic-models-to-guide-research
#8
Robert A Hiatt, Margaret A Handley, Pamela M Ling, Esteban Burchard, Neeta Thakur, Kirsten Bibbins-Domingo
Cancer disparities research is motivated by persistent inequities in cancer outcomes by race, ethnicity, social status, neighborhood location, and other subpopulation characteristics. These inequities have proven to be persistent and difficult to alter. Part of the reason for the frustration with slow progress is a lack of appreciation of the long-term nature of the undertaking. It is highly likely that the disparities observed in adulthood find their origins in young adulthood, if not earlier. A long-term perspective is needed, recognizing that successes may take many years to realize...
September 2017: American Journal of Preventive Medicine
https://www.readbyqxmd.com/read/28818232/review-of-the-endothelial-pathogenic-mechanism-of-tie2-related-venous-malformation
#9
REVIEW
Zhong Du, JiaWei Zheng, ZhiYuan Zhang, YanAn Wang
BACKGROUND: Venous malformation (VM) is a type of disease involving vascular morphogenesis in humans. Clinically, VM can be sporadic or inherited. TIE2, also known as TEK or HYK, is a member of the receptor tyrosine kinase subfamily and is highly conserved among species. In 1996, an arginine-to-tryptophan substitution at position 849 (R849W) in TIE2 was found to induce hereditary VM. Additional alterations in TIE2 involved in the pathogenesis of inherited or sporadic VM have since been reported...
September 2017: Journal of Vascular Surgery. Venous and Lymphatic Disorders
https://www.readbyqxmd.com/read/28818063/variations-in-adolescents-motivational-characteristics-across-gender-and-physical-activity-patterns-a-latent-class-analysis-approach
#10
Margaret Lawler, Caroline Heary, Elizabeth Nixon
BACKGROUND: Neglecting to take account of the underlying context or type of physical activity (PA) that underpins overall involvement has resulted in a limited understanding of adolescents' PA participation. The purpose of the present research was to identify male and female adolescents' leisure time PA patterns and examine whether psychological processes derived from self-determination theory differ as a function of the pattern of PA undertaken. METHODS: Nine hundred ninety-five students (61...
August 17, 2017: BMC Public Health
https://www.readbyqxmd.com/read/28818020/preserving-self-theorizing-the-social-and-psychological-processes-of-living-with-parkinson-disease
#11
Terrie Vann-Ward, Janice M Morse, Kathy Charmaz
The purpose of this constructivist grounded theory article is to identify, explore, and theorize the social and psychological processes used by people with Parkinson disease. Analytic procedures generated the five-stage theory of Preserving self of people with Parkinson disease: (a) making sense of symptoms, (b) defining turning points, (c) experiencing identity dilemmas, (d) reconnecting the self, and (e) envisioning a future. Reminders of former selves and capabilities were painful; participants desperately sought normalcy...
June 2017: Qualitative Health Research
https://www.readbyqxmd.com/read/28817966/attitudes-and-barriers-to-healthy-diet-and-physical-activity-a-latent-profile-analysis
#12
Christine A Vaughan, Madhumita Ghosh-Dastidar, Tamara Dubowitz
Healthy diet and physical activity (PA) prevent and reduce chronic disease. Social cognitive theory delineates multiple attitudes and barriers that influence these behaviors. Understanding covariation in these attitudes and barriers is complex. We examined whether individuals could be grouped into a small number of categories that are easier to study. Interviews were conducted with 982 adults from two low-income, predominantly African American neighborhoods in the same city. Social cognitive constructs, including self-efficacy, social norms, and internal and external barriers to diet and exercise, and walking were self-reported...
August 1, 2017: Health Education & Behavior: the Official Publication of the Society for Public Health Education
https://www.readbyqxmd.com/read/28817079/insight-into-the-mechanism-of-co-oxidation-on-wo%C3%A2-001-surfaces-for-gas-sensing-a-dft-study
#13
Hua Jin, Hegen Zhou, Yongfan Zhang
The mechanism of CO oxidation on the WO₃(001) surface for gas sensing performance has been systematically investigated by means of first principles density functional theory (DFT) calculations. Our results show that the oxidation of CO molecule on the perfect WO₃(001) surface induces the formation of surface oxygen vacancies, which results in an increase of the surface conductance. This defective WO₃(001) surface can be re-oxidized by the O₂ molecules in the atmosphere. During this step, the active O₂(-) species is generated, accompanied with the obvious charge transfer from the surface to O₂ molecule, and correspondingly, the surface conductivity is reduced...
August 17, 2017: Sensors
https://www.readbyqxmd.com/read/28816677/prototype-incorporated-emotional-neural-network
#14
Oyebade K Oyedotun, Adnan Khashman
Artificial neural networks (ANNs) aim to simulate the biological neural activities. Interestingly, many ''engineering'' prospects in ANN have relied on motivations from cognition and psychology studies. So far, two important learning theories that have been subject of active research are the prototype and adaptive learning theories. The learning rules employed for ANNs can be related to adaptive learning theory, where several examples of the different classes in a task are supplied to the network for adjusting internal parameters...
August 15, 2017: IEEE Transactions on Neural Networks and Learning Systems
https://www.readbyqxmd.com/read/28816405/synthesis-density-functional-theory-calculations-and-luminescence-of-lanthanide-complexes-with-2-6-bis-3-methoxybenzylidene-hydrazinocarbonyl-pyridine-schiff-base-ligand
#15
Ziyad A Taha, Taher S Ababneh, Ahmed K Hijazi, Qutaiba Abu-Salem, Abdulaziz M Ajlouni, Shroq Ebwany
A pyridine-diacylhydrazone Schiff base ligand, L = 2,6-bis[(3-methoxy benzylidene)hydrazinocarbonyl]pyridine was prepared and characterized by single crystal X-ray diffraction. Lanthanide complexes, Ln-L, {[LnL(NO3 )2 ]NO3 .xH2 O (Ln = La, Pr, Nd, Sm, Eu, Gd, Tb, Dy and Er)} were prepared and characterized by elemental analysis, molar conductance, thermal analysis (TGA/DTGA), mass spectrometry (MS), Fourier transform infra-red (FT-IR) and nuclear magnetic resonance (NMR) spectroscopy. Ln-L complexes are isostructural with four binding sites provided by two nitro groups along with four coordination sites for L...
August 17, 2017: Luminescence: the Journal of Biological and Chemical Luminescence
https://www.readbyqxmd.com/read/28815872/a-multimethod-computational-simulation-approach-for-investigating-mitochondrial-dynamics-and-dysfunction-in-degenerative-aging
#16
Timothy E Hoffman, Katherine J Barnett, Lyle Wallis, William H Hanneman
Research in biogerontology has largely focused on the complex relationship between mitochondrial dysfunction and biological aging. In particular, the mitochondrial free radical theory of aging (MFRTA) has been well accepted. However, this theory has been challenged by recent studies showing minimal increases in reactive oxygen species (ROS) as not entirely deleterious in nature, and even beneficial under the appropriate cellular circumstances. To assess these significant and nonintuitive observations in the context of a functional system, we have taken an in silico approach to expand the focus of the MFRTA by including other key mitochondrial stress response pathways, as they have been observed in the nematode Caenorhabditis elegans...
August 16, 2017: Aging Cell
https://www.readbyqxmd.com/read/28814700/the-birth-of-hospital-asclepius-cult-and-early-christianity
#17
In-Sok Yeo
History of hospital is one of main fields of researches in medical history. Besides writing a history of an individual hospital, considerable efforts have been made to trace the origin of hospital. Those who quest for the origin of hospital are faced with an inevitable problem of defining hospital. As the different definition can lead to a different outcome, it is important to make a clear definition. In this article, the hospital was defined as an institution in which patients are housed and given medical treatments...
April 2017: Ŭi Sahak
https://www.readbyqxmd.com/read/28814580/ventrain-from-theory-to-practice-bridging-until-re-tracheostomy
#18
Bianca Maria Wahlen, Hassan Al-Thani, Ayman El-Menyar
Imminent upper airway obstruction due to life-threatening tracheal stenosis of any cause is challenging. A 77-year-old woman, with a history of temporal tracheostomy for prolonged mechanical ventilation, presented with life-threatening tracheal stenosis to the emergency department. After failed intubation with a 5.0 mm internal diameter endotracheal tube, the patient was ventilated via a tube exchanger using Ventrain. Ventrain is a manual ventilation device that, in addition to oxygen supply during inspiration, initiates expiration by actively removing gas from the lungs by suction...
August 16, 2017: BMJ Case Reports
https://www.readbyqxmd.com/read/28814374/from-bench-laboratory-to-bed-hospital-home-how-to-explore-effective-natural-and-synthetic-pak1-blockers-longevity-promoters-for-cancer-therapy
#19
REVIEW
Hiroshi Maruta, Mok-Ryeon Ahn
PAK family kinases are RAC/CDC42-activated kinases that were first found in a soil amoeba 4 decades ago, and 2 decades later, were discovered in mammals as well. Since then at least 6 members of this family have been identified in mammals. One of them called PAK1 has been best studied so far, mainly because it is essential not only for malignant cell growth and metastasis, but also for many other diseases/disorders such as diabetes (type 2), AD (Alzheimer's disease), hypertension, and a variety of inflammatory or infectious diseases, which definitely shorten our lifespan...
August 9, 2017: European Journal of Medicinal Chemistry
https://www.readbyqxmd.com/read/28813296/couple-conflict-insights-from-an-attachment-perspective
#20
REVIEW
Judith A Feeney, Gery C Karantzas
The experience of conflict is often cited as a highly stressful relational phenomenon by romantic couples, and can have negative implications for relationship satisfaction and for the longevity of romantic relationships. In this paper, we review extant research on couple conflict in romantic relationships from an attachment theory perspective. The research we review is underpinned by two central tenets: firstly, severe or persistent conflict activates the attachment system; secondly, responses to couple conflict involve complex attachment dynamics, shaped by partners' attachment anxiety and avoidance...
February 2017: Current Opinion in Psychology
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