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https://www.readbyqxmd.com/read/28549323/investigation-of-submicron-aerosol-characteristics-in-changzhou-china-composition-source-and-comparison-with-co-collected-pm2-5
#1
Zhaolian Ye, Qing Li, Jiashu Liu, Shipeng Luo, Quanfa Zhou, Chenglu Bi, Shuaishuai Ma, Yanfang Chen, Hui Chen, Ling Li, Xinlei Ge
Mass concentrations and chemical compositions of submicron particles (PM1) collected during July 2015 to April 2016 in Changzhou, a city in the Yangtze River Delta region, were systematically investigated for the first time. Specifically, an Aerodyne soot particle aerosol mass spectrometer (SP-AMS) was employed to characterize the water-soluble organic matter (WSOM). The average concentration of PM1 was 63.6 μg m(-3), occupying ∼60% of co-collected PM2.5 mass. Water soluble inorganic ions (WSIIs) was the most abundant component with secondary ions (SO4(2-), NO3(-) and NH4(+)) as the dominant species...
May 17, 2017: Chemosphere
https://www.readbyqxmd.com/read/28548315/aapm-medical-physics-practice-guideline-8-a-linear-accelerator-performance-tests
#2
Koren Smith, Peter Balter, John Duhon, Gerald A White, David L Vassy, Robin A Miller, Christopher F Serago, Lynne A Fairobent
PURPOSE: The purpose of this guideline is to provide a list of critical performance tests in order to assist the Qualified Medical Physicist (QMP) in establishing and maintaining a safe and effective quality assurance (QA) program. The performance tests on a linear accelerator (linac) should be selected to fit the clinical patterns of use of the accelerator and care should be given to perform tests which are relevant to detecting errors related to the specific use of the accelerator. METHODS: A risk assessment was performed on tests from current task group reports on linac QA to highlight those tests that are most effective at maintaining safety and quality for the patient...
May 26, 2017: Journal of Applied Clinical Medical Physics
https://www.readbyqxmd.com/read/28548165/on-the-underestimated-impact-of-the-gelation-temperature-on-macro-and-mesoporosity-in-monolithic-silica
#3
Rafael Meinusch, Rüdiger Ellinghaus, Kristof Hormann, Ulrich Tallarek, Bernd M Smarsly
The preparation of monolithic SiO2 with bimodal porosity using a special sol-gel procedure ("Nakanishi process") generally shows a pronounced sensitivity towards several physico-chemical parameters of the initial solution (concentrations, precursors, pH, temperature, etc.). Thus, temporal and spatial variations of these parameters during the sol-gel reactions can affect the final meso- and macropore space with respect to the pore size distributions and homogeneity. In this study we thoroughly examine the sol-gel reaction in terms of the impact of temperature accuracy and homogeneity during the gelation and their effect on meso- and macropore space...
May 26, 2017: Physical Chemistry Chemical Physics: PCCP
https://www.readbyqxmd.com/read/28547381/purinergic-signalling-links-mechanical-breath-profile-and-alveolar-mechanics-with-the-pro-inflammatory-innate-immune-response-causing-ventilation-induced-lung-injury
#4
REVIEW
Djo Hasan, Paul Blankman, Gary F Nieman
Severe pulmonary infection or vigorous cyclic deformation of the alveolar epithelial type I (AT I) cells by mechanical ventilation leads to massive extracellular ATP release. High levels of extracellular ATP saturate the ATP hydrolysis enzymes CD39 and CD73 resulting in persistent high ATP levels despite the conversion to adenosine. Above a certain level, extracellular ATP molecules act as danger-associated molecular patterns (DAMPs) and activate the pro-inflammatory response of the innate immunity through purinergic receptors on the surface of the immune cells...
May 26, 2017: Purinergic Signalling
https://www.readbyqxmd.com/read/28547379/concerning-the-importance-of-ontological-issues-for-cultural-psychology-a-reply-to-comments
#5
Irina A Mironenko
The paper continues the "ontological" discussion in IBPS, addressing the question of the importance of ontological issues for contemporary development of cultural psychology. The language psychological science speaks is considered as an ontological issue and a most topical one for cultural psychology, aiming at "constructing a psychology that is universal while being culture-inclusive" (Valsiner 2009, p.2). Ontological issues could stay implicit and neglected, as long as the 'etant, "the mode of being", "the particularities" were discussed within the circle of adherents of one and the same school, who implicitly had in mind the same 'entre...
May 25, 2017: Integrative Psychological & Behavioral Science
https://www.readbyqxmd.com/read/28546984/the-comparison-of-printed-resources-bacterial-contamination-in-libraries-of-al-zahra-hospital-and-sciences-faculty-of-isfahan-university-and-the-determination-of-their-antibiotic-sensitivity-pattern
#6
Hosein Rafiei, Mostafa Chadeganipour, Rezvan Ojaghi, Mohammad Reza Maracy, Rasool Nouri
INTRODUCTION: During the library loan process, the printed resources can be a carrier of pathogenic bacteria. In this study, it was tried to compare the Bacterial Contamination Rates and their antibiotic sensitivity pattern in printed resources of a hospital and a non-hospital library. METHODS: This is a cross-sectional study. Returning books from the Al-Zahra hospital library and library of Sciences faculty of Isfahan University provides the research community...
2017: Journal of Education and Health Promotion
https://www.readbyqxmd.com/read/28546431/disruption-of-mitochondrial-electron-transport-chain-function-potentiates-the-pro-apoptotic-effects-of-mapk-inhibition
#7
Andrew P Trotta, Jesse D Gelles, Madhavika N Serasinghe, Patrick Loi, Jack L Arbiser, Jerry E Chipuk
The mitochondrial network is a major site of ATP production through the coupled integration of the electron transport chain (ETC) with oxidative phosphorylation. In melanoma, arising from the Val600Glu mutation in the kinase v-RAF murine sarcoma viral oncogene homolog B (BRAFV600E), oncogenic signaling enhances glucose-dependent metabolism, while reducing mitochondrial ATP production. Likewise, when BRAFV600E is pharmacologically inhibited by targeted therapies (e.g. PLX-4032/Vemurafenib), glucose metabolism is reduced and cells increase mitochondrial ATP production to sustain survival...
May 25, 2017: Journal of Biological Chemistry
https://www.readbyqxmd.com/read/28546078/doxycycline-affects-gene-expression-profiles-in-aortic-tissues-in-a-rat-model-of-vascular-calcification
#8
Hailin Lu, Wenhong Jiang, Han Yang, Zhong Qin, Si-En Guo, Ming Hu, Xiao Qin
Vitamin D3-induced vascular calcification (VC) in rats shares many phenotypical similarities with calcification occurring in human atherosclerosis, diabetes mellitus and chronic kidney disease, thereby it is a reliable model for identifying chemopreventive agents. Doxycycline has been shown to effectively attenuated VC. This study aimed to explore the effects of doxycycline on gene expression profiles in VC rats. The model of VC in rats was established by subcutaneous injection of vitamin D3 for 3days. Doxycycline at 120mgkg(-1)day(-1) was given via subcutaneous injection for 14days...
May 22, 2017: Microvascular Research
https://www.readbyqxmd.com/read/28546038/-pathophysiology-of-detrusor-underactivity-in-the-elderly
#9
J Kerdraon, B Peyronnet, X Gamé, B Fatton, R Haddad, C Hentzen, C Jeandel, P Mares, M Mezzadri, A-C Petit, G Robain, J-M Vetel, G Amarenco
AIM: The aim of this study was to review the evidence regarding the pathophysiology of detrusor underactivity in the elderly. METHODS: A literature review was conducted in July 2016 using the Medline/Pubmed database limiting the search to works in English or French. RESULTS: The prevalence of detrusor underactivity has been reported to range from 8% to 48% depending on the definition used and the age of the population studied. Current data suggest that aging may itself be a causative factor of detrusor underactivity through myogenic dysfunctions (ultrastructural degeneration of the detrusor muscle) and neurogenic dysfunctions (by degeneration of efferent but mostly afferent innervation mechanisms)...
May 22, 2017: Progrès en Urologie
https://www.readbyqxmd.com/read/28545809/macrophage-specific-nanotechnology-driven-cd163-overexpression-in-human-macrophages-results-in-an-m2-phenotype-under-inflammatory-conditions
#10
Perla Abigail Alvarado-Vazquez, Laura Bernal, Candler A Paige, Rachel L Grosick, Carolina Moracho Vilrriales, David Wilson Ferreira, Cristina Ulecia-Morón, E Alfonso Romero-Sandoval
M1 macrophages release proinflammatory factors during inflammation. They transit to an M2 phenotype and release anti-inflammatory factors to resolve inflammation. An imbalance in the transition from M1 to M2 phenotype in macrophages contributes to the development of persistent inflammation. CD163, a member of the scavenger receptor cysteine-rich family, is an M2 macrophage marker. The functional role of CD163 during the resolution of inflammation is not completely known. We postulate that CD163 contributes to the transition from M1 to M2 phenotype in macrophages...
May 16, 2017: Immunobiology
https://www.readbyqxmd.com/read/28545499/pre-silencing-of-genes-involved-in-the-electron-transport-chain-etc-pathway-is-associated-with-responsiveness-to-abatacept-in-rheumatoid-arthritis
#11
C Derambure, G Dzangue-Tchoupou, C Berard, N Vergne, M Hiron, M A D'Agostino, P Musette, O Vittecoq, T Lequerré
BACKGROUND: In the current context of personalized medicine, one of the major challenges in the management of rheumatoid arthritis (RA) is to identify biomarkers that predict drug responsiveness. From the European APPRAISE trial, our main objective was to identify a gene expression profile associated with responsiveness to abatacept (ABA) + methotrexate (MTX) and to understand the involvement of this signature in the pathophysiology of RA. METHODS: Whole human genome microarrays (4 × 44 K) were performed from a first subset of 36 patients with RA...
May 25, 2017: Arthritis Research & Therapy
https://www.readbyqxmd.com/read/28544932/vascular-homing-peptides-for-cancer-therapy
#12
REVIEW
Lan Lu, Huan Qi, Jie Zhu, Wen Xia Sun, Bin Zhang, Chun Yan Tang, Qiang Cheng
In the past 30 years, a variety of phage libraries have been extensively utilized to identify and develop tumor homing peptides (THPs). THPs specifically bind to tumor cells or elements of the tumor microenvironment while no or low affinity to normal cells. In this regard, the efficacy of therapeutic agents in cancer therapy can be enhanced by targeting strategies based on coupling with THPs that recognize receptors expressed by tumor cells or tumor vasculature. Especially, vascular-homing peptides, targeting tumor vasculature, have their receptors expressed on or around the blood vessel including pro-angiogenic factors, metalloproteinase, integrins, fibrin-fibronectin complexes, etc...
May 22, 2017: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
https://www.readbyqxmd.com/read/28544073/hydrophilic-interaction-and-reversed-phase-ultra-performance-liquid-chromatography-tof-ms-for-metabolomic-analysis-of-veratrum-nigrum-induced-cardiotoxicity
#13
Ziheng Wei, Xu Dong, Hanzhe Zhang, Songyan Gao, Wei Shi, Feng Yang, Xin Dong
The acute cardiotoxicity induced by Veratrum nigrum (VN) is explored by analysing heart tissue metabolic profiles in mouse models and applying reversed-phase liquid chromatography mass spectrometry (RPLC-MS) and hydrophilic interaction liquid chromatography mass spectrometry (HILIC-MS) that are based on ultra-high performance liquid chromatography quadrupole time-of-flight mass spectrometry (UPLC-QTOF-MS). An animal model of acute heart injury was established in mice via intra-gastric administration of VN. Then, electrocardiogram, echocardiograph monitoring of cardiac function and pathological examination were performed on mice both in the control and VN groups, and it was successfully verified that acute heart injury was caused...
May 22, 2017: Biomedical Chromatography: BMC
https://www.readbyqxmd.com/read/28543532/intraepidermal-merkel-cell-carcinoma-a-case-series-of-a-rare-entity-with-clinical-follow-up
#14
George Jour, Phyu P Aung, Eduardo Rozas-Muñoz, Johnathan L Curry, Victor Prieto, Doina Ivan
BACKGROUND: Merkel cell carcinoma (MCC) is a rare but aggressive cutaneous carcinoma. MCC involves typically dermis and although epidermotropism has been reported, MCC strictly intraepidermal or in situ (MCCIS) is exceedingly rare. Most of the cases of MCCIS described so far have associated other lesions, such as squamous or basal cell carcinoma, actinic keratosis, etc. Herein, we describe three patients with MCC strictly in situ, without a dermal component. METHODS: Our patients were elderly, two of the lesions involved the head and neck area and one was on a finger...
May 23, 2017: Journal of Cutaneous Pathology
https://www.readbyqxmd.com/read/28542542/comparative-analysis-of-bacterial-community-structure-in-the-rhizosphere-of-maize-by-high-throughput-pyrosequencing
#15
Yi Yang, Na Wang, Xinyan Guo, Yi Zhang, Boping Ye
In this study, we designed a microcosm experiment to explore the composition of the bacterial community in the rhizosphere of maize and bulk soil by sequencing the V3-V4 region of the 16S rRNA gene on the Illumina system. 978-1239 OTUs (cut off level of 3%) were found in rhizosphere and bulk soil samples. Rhizosphere shared features with the bulk soil, such as predominance of Acidobacteria, Proteobacteria, Actinobacteria, Bacteroidetes, Chloroflexi, Firmicutes, Gemmatimonadetes and TM7. At genus level, many of the dominant rhizosphere genera (Chitinophaga, Nitrospira, Flavobacterium, etc...
2017: PloS One
https://www.readbyqxmd.com/read/28541892/automatic-detection-of-retinal-lesions-for-screening-of-diabetic-retinopathy
#16
Sudeshna Sil Kar, Santi Maity
OBJECTIVE: Diabetic Retinopathy (DR) is characterized by the progressive deterioration of retina with the appearance of different types of lesions that include microaneurysms, hemorrhages, exudates etc. Detection of these lesions plays significant role for early diagnosis of DR. METHODS: To this aim, this paper proposes a novel and automated lesion detection scheme which consists of the four main steps: vessel extraction and optic disc removal, pre-processing, candidate lesion detection and post-processing...
May 24, 2017: IEEE Transactions on Bio-medical Engineering
https://www.readbyqxmd.com/read/28541376/dna-sequence-shape-kernel-enables-alignment-free-modeling-of-transcription-factor-binding
#17
Wenxiu Ma, Lin Yang, Remo Rohs, William Stafford Noble
Motivation: Transcription factors (TFs) bind to specific DNA sequence motifs. Several lines of evidence suggest that TF-DNA binding is mediated in part by properties of the local DNA shape: the width of the minor groove, the relative orientations of adjacent base pairs, etc. Several methods have been developed to jointly account for DNA sequence and shape properties in predicting TF binding affinity. However, a limitation of these methods is that they typically require a training set of aligned TF binding sites...
May 24, 2017: Bioinformatics
https://www.readbyqxmd.com/read/28541234/psychiatric-specialty-training-in-greece
#18
EDITORIAL
M Margariti, V Kontaxakis, D Ploumpidis
The reform and development of psychiatric services require, in addition to financial resources, reserves in specialized human resources. The role of psychiatrists in this process, and at reducing the consequences of mental morbidity is evident. Psychiatrists are required to play a multifaceted role as clinicians, as experts in multidisciplinary team environments and as advisors in the recognition of public needs in mental health issues, as teachers and mentors for students and other health professionals, as researchers in order to enrich our knowledge in the scientific field of psychiatry, and as public health specialists in the development of the mental health services system...
January 2017: Psychiatrikē, Psychiatriki
https://www.readbyqxmd.com/read/28540752/herpes-zoster-typical-and-atypical-presentations
#19
Roy Rafael Dayan, Roni Peleg
Varicella- zoster virus infection is an intriguing medical entity that involves many medical specialties including infectious diseases, immunology, dermatology, and neurology. It can affect patients from early childhood to old age. Its treatment requires expertise in pain management and psychological support. While varicella is caused by acute viremia, herpes zoster occurs after the dormant viral infection, involving the cranial nerve or sensory root ganglia, is re-activated and spreads orthodromically from the ganglion, via the sensory nerve root, to the innervated target tissue (skin, cornea, auditory canal, etc...
May 25, 2017: Postgraduate Medicine
https://www.readbyqxmd.com/read/28540228/research-in-pharmacotherapy-for-erectile-dysfunction
#20
REVIEW
Ji-Kan Ryu, Jun-Kyu Suh, Arthur L Burnett
Although oral phosphodiesterase-5 (PDE5) inhibitors are generally accepted as an effective therapy for erectile dysfunction (ED), men with ED from diabetes or radical prostatectomy respond poorly to these drugs. Many researchers have tried to develop novel therapeutics that target alternative molecular pathways. A group of therapeutics belongs to centrally acting agents that target dopamine and melanocortin receptors. The other one is the peripherally acting agents that target soluble guanylate cyclase, Rho-kinase pathway, and Maxi-K channel, etc...
April 2017: Translational Andrology and Urology
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