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https://www.readbyqxmd.com/read/28529793/crystal-structure-and-hirshfeld-surface-analysis-of-3-oxours-12-ene-27a-28-dioic-acid-quafrinoic-acid
#1
Jean Jules Bankeu Kezetas, Stéphanie Dietagoum Madjouka, Rajesh Kumar, Muhammad Shaiq Ali, Bruno Lenta Njakou, Sammer Yousuf
The title compound, C30H44O5, is a penta-cyclic triterpene isolated from the Cameroonian medicinal plant Nauclea Pobeguinii and known as quafrinoic acid. The mol-ecule is composed of five fused six-membered rings, four of which adopt a chair conformation and one a half-chair conformation. Intra-molecular C-H⋯O hydrogen-bond inter-actions exist, which generate S6 and S8 rings. In the crystal, mol-ecules are linked by pairs of O-H⋯O hydrogen bonds, linking R2(2)(8) rings into chains running parallel to the a axis; these chains are further connected into layers parallel to the ab plane by C-H⋯O hydrogen bonds...
May 1, 2017: Acta Crystallographica. Section E, Crystallographic Communications
https://www.readbyqxmd.com/read/28507772/clinically-significant-depressive-symptoms-and-sexual-behaviour-among-men-who-have-sex-with-men
#2
Ada R Miltz, Alison J Rodger, Janey Sewell, Andrew Speakman, Andrew N Phillips, Lorraine Sherr, Richard J Gilson, David Asboe, Nneka C Nwokolo, Amanda Clarke, Mark M Gompels, Sris Allan, Simon Collins, Fiona C Lampe
BACKGROUND: The relationship between depression and sexual behaviour among men who have sex with men (MSM) is poorly understood. AIMS: To investigate prevalence and correlates of depressive symptoms (Patient Health Questionnaire-9 score ≥10) and the relationship between depressive symptoms and sexual behaviour among MSM reporting recent sex. METHOD: The Attitudes to and Understanding of Risk of Acquisition of HIV (AURAH) is a cross-sectional study of UK genitourinary medicine clinic attendees without diagnosed HIV (2013-2014)...
May 2017: BJPsych Open
https://www.readbyqxmd.com/read/28503375/network-science-meets-respiratory-medicine-for-osas-phenotyping-and-severity-prediction
#3
Stefan Mihaicuta, Mihai Udrescu, Alexandru Topirceanu, Lucretia Udrescu
Obstructive sleep apnea syndrome (OSAS) is a common clinical condition. The way that OSAS risk factors associate and converge is not a random process. As such, defining OSAS phenotypes fosters personalized patient management and population screening. In this paper, we present a network-based observational, retrospective study on a cohort of 1,371 consecutive OSAS patients and 611 non-OSAS control patients in order to explore the risk factor associations and their correlation with OSAS comorbidities. To this end, we construct the Apnea Patients Network (APN) using patient compatibility relationships according to six objective parameters: age, gender, body mass index (BMI), blood pressure (BP), neck circumference (NC) and the Epworth sleepiness score (ESS)...
2017: PeerJ
https://www.readbyqxmd.com/read/28486209/bioactivity-guided-mixed-synthesis-accelerate-the-serendipity-in-lead-optimization-discovery-of-fungicidal-homodrimanyl-amides
#4
Dangdang Li, Shasha Zhang, Zehua Song, Guotong Wang, Shengkun Li
The bioactivity-guided mixed synthesis was conceived, in which the designed mix-reactions were run in parallel for simultaneous construction of different kinds of analogs. The valuable ones were protruded by biological screening. This tactic will facilitate more rapid incorporation of bioactive candidates into pesticide chemists' repertoire, exemplified by the optimization of less explored homodrimanes as antifungal ingredients. The discovery of D9 as a potent fungicidal agent can be completed in <2 weeks by one student, with EC50 of 3...
May 2, 2017: European Journal of Medicinal Chemistry
https://www.readbyqxmd.com/read/28480864/-antiseizure-activity-of-c-ephalaria-gigantea-root-extract
#5
N Gogitidze, N Mushkiashvili, M Gedevanishvili, N Tabatadze, G Dekanosidze
Antiseizure activity of Cephalaria gigantea root extract was studied using PTZ- and/or audiogenic seizure models in outbred Wistar and inbred Krouchinsky- Molodkina rats respectively. In PTZ - model onset of tonic- clonic seizures, latencies to the beginning of the seizure activity, and mortality, and similarly in audiogenic seizures behavioral convulsive reactions , facial automatisms and latency to wild running were evaluated. The extract is used traditionally in Georgian folk medicine as anticonvulsant drug...
March 2017: Georgian Medical News
https://www.readbyqxmd.com/read/28469407/analytical-method-validation-of-high-performance-liquid-chromatography-and-stability-indicating-study-of-medroxyprogesterone-acetate-intravaginal-sponges
#6
Nidal Batrawi, Shorouq Wahdan, Murad Abualhasan
Medroxyprogesterone acetate is widely used in veterinary medicine as intravaginal dosage for the synchronization of breeding cycle in ewes and goats. The main goal of this study was to develop reverse-phase high-performance liquid chromatography method for the quantification of medroxyprogesterone acetate in veterinary vaginal sponges. A single high-performance liquid chromatography/UV isocratic run was used for the analytical assay of the active ingredient medroxyprogesterone. The chromatographic system consisted of a reverse-phase C18 column as the stationary phase and a mixture of 60% acetonitrile and 40% potassium dihydrogen phosphate buffer as the mobile phase; the pH was adjusted to 5...
2017: Analytical Chemistry Insights
https://www.readbyqxmd.com/read/28468111/-changes-of-the-guangdong-professional-school-of-traditional-chinese-medicine-in-early-new-china
#7
H Zheng
As the only extant school of traditional Chinese medicine(TCM) at the founding of New China, the Guangdong Professional School of TCM was ordered to shut down, thus arousing the contention on whether such schools should be held or not. After the First Congress on Health, the School was existed for the time being, and was incorporated into the Guangdong Training School of TCM due to the reformation of educational system. Actually, the goal of the latter School was to "reform" TCM rather than to cultivate and protect TCM...
March 28, 2017: Zhonghua Yi Shi za Zhi, Chinese Journal of Medical History
https://www.readbyqxmd.com/read/28456113/the-enhancement-mechanism-of-wine-processed-radix-scutellaria-on-ntg-induced-migraine-rats
#8
Cheng-Long Cui, Xin He, Cui-Lan Dong, Zi-Jing Song, Jun Ji, Xue Wang, Ling Wang, Jiao-Ying Wang, Wen-Juan Du, Chong-Zhi Wang, Chun-Su Yuan, Chang-Run Guo, Chun-Feng Zhang
To elucidate the increasing dissolution and enhancement mechanism of wine-processed Radix Scutellaria (RS) by fractal theory in nitroglycerin (NTG)-induced migraine rats. We prepared three RS from the process with 10% (S1), 15% (S2), 20% (S3) (v/m) rice wine. Mercury intrusion porosimetry and scanning electron microscope were employed to explore the internal structure of RS and the components dissolution of RS was analyzed by HPLC. Rats were randomly allocated into following groups and orally given different solutions for 10days: normal group (NOR, normal saline), model group (MOD, normal saline), Tianshu capsule group (TSC, 0...
April 26, 2017: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
https://www.readbyqxmd.com/read/28449031/rnablueprint-flexible-multiple-target-nucleic-acid-sequence-design
#9
Stefan Hammer, Birgit Tschiatschek, Christoph Flamm, Ivo L Hofacker, Sven Findeiß
Motivation: Realizing the value of synthetic biology in biotechnology and medicine requires the design of molecules with specialized functions. Due to its close structure to function relationship, and the availability of good structure prediction methods and energy models, RNA is perfectly suited to be synthetically engineered with predefined properties. However, currently available RNA design tools cannot be easily adapted to accommodate new design specifications. Furthermore, complicated sampling and optimization methods are often developed to suit a specific RNA design goal, adding to their inflexibility...
April 25, 2017: Bioinformatics
https://www.readbyqxmd.com/read/28445850/simultaneous-quantification-of-busulfan-clofarabine-and-f-ara-a-using-isotope-labelled-standards-and-standard-addition-in-plasma-by-lc-ms-ms-for-exposure-monitoring-in-hematopoietic-cell-transplantation-conditioning
#10
Arjen M Punt, Jurgen B Langenhorst, Annelies C Egas, Jaap Jan Boelens, Charlotte van Kesteren, Erik M van Maarseveen
In allogeneic hematopoietic cell transplantation (HCT) it has been shown that over- or underexposure to conditioning agents have an impact on patient outcomes. Conditioning regimens combining busulfan (Bu) and fludarabine (Flu) with or without clofarabine (Clo) are gaining interest worldwide in HCT. To evaluate and possibly adjust full conditioning exposure a simultaneous analysis of Bu, F-ARA-A (active metabolite of Flu) and Clo in one analytical run would be of great interest. However, this is a chromatographical challenge due to the large structural differences of Bu compared to F-ARA-A and Clo...
April 15, 2017: Journal of Chromatography. B, Analytical Technologies in the Biomedical and Life Sciences
https://www.readbyqxmd.com/read/28443025/honokiol-induces-apoptosis-g1-arrest-and-autophagy-in-kras-mutant-lung-cancer-cells
#11
Lian-Xiang Luo, Ying Li, Zhong-Qiu Liu, Xing-Xing Fan, Fu-Gang Duan, Run-Ze Li, Xiao-Jun Yao, Elaine Lai-Han Leung, Liang Liu
Aberrant signaling transduction induced by mutant KRAS proteins occurs in 20∼30% of non-small cell lung cancer (NSCLC), however, a direct and effective pharmacological inhibitor targeting KRAS has not yet reached the clinic to date. Honokiol, a small molecular polyphenol natural biophenolic compound derived from the bark of magnolia trees, exerts anticancer activity, however, its mechanism remains unknown. In this study, we sought to investigate the in vitro effects of honokiol on NSCLC cell lines harboring KRAS mutations...
2017: Frontiers in Pharmacology
https://www.readbyqxmd.com/read/28441546/isolation-of-new-polyacetylenes-from-the-roots-of-eurycoma-longifolia-via-high-speed-counter-current-chromatography
#12
Minglong Wang, Huijuan Zou, Qibin Chen, Jianguo Cao, Haji Akber Aisa, Guozheng Huang
Eurycoma longifolia is a tropical plant of diverse applications in folk medicine, which occurs in Southeast Asia. In this study, pre-purified fraction (0.86g) of the crude extracts from the roots of E. longifolia, was subjected to preparative high-speed counter-current chromatography (HSCCC) with a two-phase solvent system composed of hexane-ethyl acetate-methanol-water (HEMWat) at a volume ratio of 5:2:5:2 (v/v). Longifolione A (1, 19mg, purity 96.0%) and longifolione C (3, 317mg, purity 96.2%), together with longifolione B (2, purity 77...
April 1, 2017: Journal of Chromatography. B, Analytical Technologies in the Biomedical and Life Sciences
https://www.readbyqxmd.com/read/28441129/medical-school-outreach-and-mentorship-for-rural-secondary-school-students-a-pilot-of-the-southwestern-ontario-medical-mentorship-program
#13
Maija A Robinson, Matt B Douglas-Vail, Jessica N Bryce, Theunis J van Zyl
INTRODUCTION: Rural communities in Canada face challenges with physician recruitment. Physicians from rural backgrounds are more likely to practise in rural areas; however, rural students are underrepresented in medical schools. To address this, the Southwestern Ontario Medical Mentorship Program (SWOMMP) was created to expose rural secondary school students to medical careers. METHODS: This pilot project involved a school-based interactive session run by rural medical students on paths to medicine, medical specialties and skills workshops of roughly 2...
2017: Canadian Journal of Rural Medicine
https://www.readbyqxmd.com/read/28431784/technical-and-instrumentational-foundations-of-pet-mri
#14
Ivo Rausch, Harald H Quick, Jacobo Cal-Gonzalez, Bernhard Sattler, Ronald Boellaard, Thomas Beyer
This paper highlights the origins of combined positron emission tomography (PET) and magnetic resonance imaging (MRI) whole-body systems that were first introduced for applications in humans in 2010. This text first covers basic aspects of each imaging modality before describing the technical and methodological challenges of combining PET and MRI within a single system. After several years of development, combined and even fully-integrated PET/MRI systems have become available and made their way into the clinic...
April 8, 2017: European Journal of Radiology
https://www.readbyqxmd.com/read/28424791/antifatigue-effects-of-antrodia-cinnamomea-cultured-mycelium-via-modulation-of-oxidative-stress-signaling-in-a-mouse-model
#15
Yange Liu, Lanzhou Li, Shengshu An, Yuanzhu Zhang, Shiwei Feng, Lu Zhao, Lirong Teng, Di Wang
Antrodia cinnamomea, a folk medicinal mushroom, has numerous biological effects. In this study, we aim to assess whether the antifatigue effects of A. cinnamomea mycelia (AC) and its underlying mechanisms are related to oxidative stress signaling using behavioral mouse models and biochemical indices detection. Mice were orally treated with AC at doses of 0.1, 0.3, and 0.9 g/kg for three weeks. AC had no effect on the spontaneous activities of mice indicating its safety on central nervous system. Furthermore, results obtained from weight-loaded forced swimming test, rotary rod test, and exhausted running test confirmed that AC significantly enhanced exercise tolerance of mice...
2017: BioMed Research International
https://www.readbyqxmd.com/read/28415020/simultaneous-determination-of-ten-bioactive-constituents-of-sanjie-zhentong-capsule-in-rat-plasma-by-ultra-high-performance-liquid-chromatography-tandem-mass-spectrometry-and-its-application-to-a-pharmacokinetic-study
#16
Jiachun Li, Dongpo Li, Youzhi Pan, Jun-Hua Hu, Wenzhe Huang, Zhen-Zhong Wang, Wei Xiao, Yu Wang
Sanjie Zhentong capsule, a well-known traditional Chinese medicine prescription, are used for the treatment of endometriosis-related diseases. In this study, a simple, rapid and sensitive ultra-high-performance liquid chromatography-tandem mass spectrometry (UHPLC-MS/MS) method was developed for the simultaneous determination of ten bioactive constituents, including peimine, peiminine, peimisine, loureirin A, loureirin B, 7,4'-dihydroxyflavone, pterostilbene, ginsenoside Rg1, ginsenoside Rb1, and notoginsenoside R1 in rat plasma after oral administration of Sanjie Zhentong capsule...
March 9, 2017: Journal of Chromatography. B, Analytical Technologies in the Biomedical and Life Sciences
https://www.readbyqxmd.com/read/28406104/institutionalized-physical-activity-curriculum-benefits-of-medical-students-in-colombia
#17
Gustavo Tovar, Gabriel López, Milcíades Ibáñez, Ricardo Alvarado, Felipe Lobelo, John Duperly
BACKGROUND: Health authorities internationally have recommended implementing physical activity and exercise for health training programs within the curriculum of medical schools. The purpose of this evaluation was to determine the changes in physical fitness and health (Fitnessgram criteria) of a sports medicine and physical activity course implemented for 3rd year students in a private medical school in Bogotá, Colombia. METHODS: Intervention was targeted to 13 medical student cohorts...
September 2016: Education for Health: Change in Training & Practice
https://www.readbyqxmd.com/read/28403029/secular-trends-in-the-physical-fitness-of-united-states-army-recruits-on-entry-to-service-1975-2013
#18
Joseph Knapik, Marilyn Sharp, Ryan A Steelman
A systematic literature search was conducted to identify and analyze articles that reported on physical fitness of new United States (US) Army recruits. The National Library of Medicine's PubMed and the Defense Technical Information Center, were searched using the keywords {military personnel OR trainee OR recruit OR soldier} AND {physical fitness OR strength OR endurance OR flexibility OR balance OR coordination OR muscle contraction OR running OR exercise OR physical conditioning}. Reference lists of obtained articles and contact with authors enhanced the search...
April 11, 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/28398550/the-influence-of-socioeconomic-status-on-gestational-weight-gain-a-systematic-review
#19
E C O'Brien, G Alberdi, F M McAuliffe
Background: Despite a large number of publications regarding the association between socioeconomic status (SES) and gestational weight gain (GWG), the literature is inconsistent. We conducted a systematic review of current evidence relating to the association between SES and GWG, according to the Institute of Medicine (IOM) 2009 guidelines. Methods: Six electronic databases were searched, with the final search run on first July 2016. The PRISMA Statement guidelines were followed and a modified version of the RTI Item Bank was used to assess risk of bias within studies...
April 7, 2017: Journal of Public Health
https://www.readbyqxmd.com/read/28389399/integrating-musculoskeletal-education-and-patient-care-at-medical%C3%A2-student-run-free-clinics
#20
Thomas McQuillan, Nate Wilcox-Fogel, Emily Kraus, Amy Ladd, Michael Fredericson
BACKGROUND: Student-run free clinics (SRFCs) have emerged as an important educational component of United States (US) medical schools. Despite the prevalence of musculoskeletal (MSK) problems presenting to SRFCs, students and clinics are often unprepared to diagnose and to treat common MSK complaints. OBJECTIVE: We sought to determine the scope of diagnosis and treatment at a medical student-run free clinic specializing in musculoskeletal care using physical medicine and rehabilitation (PM&R) residents...
April 5, 2017: PM & R: the Journal of Injury, Function, and Rehabilitation
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