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https://www.readbyqxmd.com/read/28918277/lead-isotopic-fingerprint-in-human-scalp-hair-the-case-study-of-iglesias-mining-district-sardinia-italy
#1
D Varrica, G Dongarrà, M G Alaimo, F Monna, R Losno, E Sanna, G De Giudici, E Tamburo
The Sulcis-Iglesiente district (SW Sardinia, Italy) has been, until recently, one of the most important Italian polymetallic mining areas for the extraction of lead. Epidemiological studies conducted over several decades have indicated this site at high risk of environmental crisis with possible adverse effects on the public health. In the present paper we discuss Pb isotope signatures in human scalp hair and road dust collected from the Sulcis-Iglesiente area in order to trace the exposure of populations to potential Pb sources...
September 14, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28916284/stereotactic-body-radiotherapy-versus-low-dose-rate-brachytherapy-for-localised-prostate-cancer-a-cost-utility-analysis
#2
J Helou, S Torres, H B Musunuru, J Raphael, P Cheung, D Vesprini, H T Chung, L D'Alimonte, M Krahn, G Morton, A Loblaw
AIMS: To conduct a cost-utility analysis comparing stereotactic body radiotherapy (SBRT) with low dose rate brachytherapy (LDR-BT) for localised prostate cancer (PCa). MATERIALS AND METHODS: A decision-analytic Markov model was developed from the healthcare payer perspective to simulate the history of a 66-year-old man with low-risk PCa. The model followed patients yearly over their remaining lifetimes. Health states included 'recurrence-free', 'biochemical recurrence' (BR), 'metastatic' and 'death'...
September 12, 2017: Clinical Oncology: a Journal of the Royal College of Radiologists
https://www.readbyqxmd.com/read/28916103/controlled-synchronized-actuation-of-microdroplets-by-gravity-in-a-superhydrophobic-3d-printed-device
#3
P E Oomen, J P S H Mulder, E Verpoorte, R D Oleschuk
Droplet manipulation over open surfaces allows one to perform assays with a large degree of control and high throughput, making them appealing for applications in drug screening or (bio)analysis. However, the design, manufacturing and operation of these systems comes with high technical requirements. In this study we employ a commercial, low-friction, superhydrophobic coating, Ultra-Ever Dry(®), on a 3D-printed microfluidic device. The device features individual droplet compartments, which allow the manipulation of discrete droplets (10-50 μL) actuated by gravity alone...
October 2, 2017: Analytica Chimica Acta
https://www.readbyqxmd.com/read/28915873/a-prospective-cohort-study-on-ambient-air-pollution-and-respiratory-morbidities-including-childhood-asthma-in-adolescents-from-the-western-cape-province-study-protocol
#4
Toyib Olaniyan, Mohamed Jeebhay, Martin Röösli, Rajen Naidoo, Roslynn Baatjies, Nino Künzil, Ming Tsai, Mark Davey, Kees de Hoogh, Dilys Berman, Bhawoodien Parker, Joy Leaner, Mohamed Aqiel Dalvie
BACKGROUND: There is evidence from existing literature that ambient air pollutant exposure in early childhood likely plays an important role in asthma exacerbation and other respiratory symptoms, with greater effect among asthmatic children. However, there is inconclusive evidence on the role of ambient air pollutant exposures in relation to increasing asthma prevalence as well as asthma induction in children. At the population level, little is known about the potential synergistic effects between pollen allergens and air pollutants since this type of association poses challenges in uncontrolled real life settings...
September 16, 2017: BMC Public Health
https://www.readbyqxmd.com/read/28915673/prognositic-value-of-cd73-adenosinergic-pathway-in-solid-tumor-a-meta-analysis-and-systematic-review
#5
Rong Wang, Yingying Zhang, Xia Lin, Yalin Gao, Ying Zhu
CD73 is a glycosylphosphatidylinositol (GPI) anchored cell surface protein that is encoded by NT5E gene, plays multiple roles in tumor processes. Previous studies have presented a potential value of CD73 served as a detectable biomarker for prognosis of several solid tumors, but the results were more controversially. A comprehensive meta-analysis was conducted to precisely evaluate the prognostic role of CD73 in solid tumors. The included studies were searched in PubMed, Web of Science and EBSCO from Jan 1990 to Jan 2016...
August 22, 2017: Oncotarget
https://www.readbyqxmd.com/read/28915493/in-situ-spectral-response-of-the-arabian-gulf-and-sea-of-oman-coastal-waters-to-bio-optical-properties
#6
Maryam R Al Shehhi, Imen Gherboudj, Hosni Ghedira
Mapping of Chlorophyll-a (Chl-a) over the coastal waters of the Arabian Gulf and the Sea of Oman using the satellite-based observations, such as MODIS (Moderate Resolution Imaging Spectro-radiometer), has shown inferior performance (Chl-a overestimation) than that of deep waters. Studies in the region have shown that this poor performance is due to three reasons: (i) water turbidity (sediments re-suspension), and the presence of colored dissolved organic matter (CDOM), (ii) bottom reflectance and (iii) incapability of the existing atmospheric correction models to reduce the effect of the aerosols from the water leaving radiance...
September 6, 2017: Journal of Photochemistry and Photobiology. B, Biology
https://www.readbyqxmd.com/read/28915055/an-efficient-method-of-designing-stable-layered-cathode-material-for-sodium-ion-batteries-using-aluminum-doping
#7
Hari Vignesh Ramasamy, Karthikeyan Kaliyappan, Ranjith Thangavel, Won Mo Seong, Kisuk Kang, Zhongwei Chen, Yun-Sung Lee
Despite their high specific capacity, sodium layered oxides suffer from severe capacity fading when cycled at higher voltages. This key issue must be addressed in order to develop high-performance cathodes for sodium ion batteries (SIBs). Herein, we present a comprehensive study on the influence of Al doping of Mn sites on the structural and electrochemical properties of a P2-Na0.5Mn0.5-xAlxCo0.5O2 (x = 0, 0.02, or 0.05) cathode for SIBs. Detailed structural, morphological, and electrochemical investigations were carried out using X-ray diffraction, cyclic voltammetry, and galvanostatic charge-discharge measurements and some new insights are proposed...
September 15, 2017: Journal of Physical Chemistry Letters
https://www.readbyqxmd.com/read/28914206/mesenchymal-stem-cell-as-a-potential-therapeutic-for-inflammatory-bowel-disease-myth-or-reality
#8
Sanjucta Adak, Sayani Mukherjee, Dwaipayan Sen
BACKGROUND: Inflammatory bowel diseases (IBD), which include Crohn's disease and Ulcerative Colitis, are inflammatory autoimmune diseases which severely affect the quality of life. Till date, no long-lasting cure has been found for the disease and all the current treatment strategies are mainly focused on dampening the symptomatic inflammatory process that has certain side effects. In addition, a large number of patients remain refractory to conventional therapies. Mesenchymal stem cells (MSCs) can be looked upon as a biodrug to treat IBD owing to their immune-suppressive and regenerative capabilities...
September 13, 2017: Current Stem Cell Research & Therapy
https://www.readbyqxmd.com/read/28912620/hormonal-contraception-and-the-development-of-autoimmunity-a-review-of-the-literature
#9
William V Williams
Estrogens and progestins are known to have profound effects on the immune system and may modulate the susceptibility to autoimmune diseases. A comprehensive literature search was carried out using PubMed for any of 153 autoimmune disease terms and the terms contraception, contraceptive, or their chemical components with limits of Humans + Title or Abstract. Over 1,800 titles were returned and scanned, 352 papers retrieved and reviewed in depth and an additional 70 papers retrieved from the bibliographies. Based on this review, substantial evidence exists linking the use of combined oral contraceptives to a lower incidence of hyperthyroidism, an increase in multiple sclerosis, ulcerative colitis, Crohn's disease, Systemic Lupus Erythematosus, and interstitial cystitis...
August 2017: Linacre Quarterly
https://www.readbyqxmd.com/read/28911817/natural-neuro-inflammatory-inhibitors-from-caragana-turfanensis
#10
Yan Song, Lan Pan, Wenjie Li, Yingying Si, Di Zhou, Chengjian Zheng, Xiaofang Hao, Xinyue Jia, Yuemei Jia, Minghui Shi, Xiaoguang Jia, Ning Li, Yue Hou
Because of the critical role of over-activated microglia in the progress of neurodegenerative diseases, it has been selected as a potential therapeutic target for drug discovery. In order to find natural neuroinflammatory inhibitors, we carried out a bioactivity-oriented phytochemical research of Caragana turfanensis Kom. (Krassn.), which is a folk medicine widely distributed in Xinjiang. As a result, a new coumarin lactone caraganolide A (1) and 35 known components were characterized from the effective extract of C...
August 23, 2017: Bioorganic & Medicinal Chemistry Letters
https://www.readbyqxmd.com/read/28911201/gene-expression-profiling-of-puberty-associated-genes-reveals-abundant-tissue-and-sex-specific-changes-across-postnatal-development
#11
Huayun Hou, Liis Uusküla-Reimand, Maisam Makarem, Christina Corre, Shems Saleh, Ariane Metcalf, Anna Goldenberg, Mark R Palmert, And Michael D Wilson
The timing of human puberty is highly variable, sexually dimorphic, and associated with adverse health outcomes. Over 20 genes carrying rare mutations have been identified in known pubertal disorders, many of which encode critical components of the hypothalamic-pituitary-gonadal (HPG) axis. Recent genome-wide association studies (GWAS) have identified more than 100 candidate genes at loci associated with age at menarche or voice breaking in males. We know little about the spatial, temporal or postnatal expression patterns of the majority of these puberty-associated genes...
September 15, 2017: Human Molecular Genetics
https://www.readbyqxmd.com/read/28910409/risk-of-acute-gastroenteritis-associated-with-human-bocavirus-infection-in-children-a-systematic-review-and-meta-analysis
#12
Ri De, Liying Liu, Yuan Qian, Runan Zhu, Jie Deng, Fang Wang, Yu Sun, Huijin Dong, Liping Jia, Linqing Zhao
Human bocaviruses (HBoVs), which were first identified in 2005 and are composed of genotypes 1-4, have been increasingly detected worldwide in pediatric patients with acute gastroenteritis. To investigate if HBoV infection is a risk factor of acute gastroenteritis in children younger than 5 years old, we searched PubMed, Embase (via Ovid), the Chinese Biomedical Literature Database (CBM), and the Cochrane Library for studies assessing the prevalence of HBoVs in individuals from Oct 25, 2005 to Oct 31, 2016...
2017: PloS One
https://www.readbyqxmd.com/read/28903880/sampling-pig-farms-at-the-abattoir-in-a-cross-sectional-study-evaluation-of-a-sampling-method
#13
Anna Camilla Birkegård, Tariq Halasa, Nils Toft
A cross-sectional study design is relatively inexpensive, fast and easy to conduct when compared to other study designs. Careful planning is essential to obtaining a representative sample of the population, and the recommended approach is to use simple random sampling from an exhaustive list of units in the target population. This approach is rarely feasible in practice, and other sampling procedures must often be adopted. For example, when slaughter pigs are the target population, sampling the pigs on the slaughter line may be an alternative to on-site sampling at a list of farms...
September 15, 2017: Preventive Veterinary Medicine
https://www.readbyqxmd.com/read/28902167/optimization-and-comparison-of-synthetic-procedures-for-a-group-of-triazinyl-substituted-benzene-sulfonamide-conjugates-with-amino-acids
#14
Dominika Krajčiová, Daniel Pecher, Vladimír Garaj, Peter Mikuš
Sulfonamides incorporating 1,3,5-triazine moieties can selectively and potently inhibit carbonic anhydrase transmembrane isoforms IX, XII, and XIV over cytosolic isoforms I and II. In the present work, a highly effective synthetic procedure was proposed for this group of potent cancerostatic drugs and compared with previously used methods. The synthesis of triazinyl-substituted benzene-sulfonamide conjugates with amino acids can be easily carried out using sodium carbonate-based water solution as a synthetic medium instead of N,N-Diisopropylethylamine/Dimethylformamide...
September 13, 2017: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
https://www.readbyqxmd.com/read/28900601/development-of-a-nitrogen-doped-2d-material-for-tribological-applications-in-the-boundary-lubrication-regime
#15
Shende Rashmi Chandrabhan, Velayudhanpillai Jayan, Somendra Singh Parihar, Sundara Ramaprabhu
The present paper describes a facile synthesis method for nitrogen-doped reduced graphene oxide (N-rGO) and the application of N-rGO as an effective additive for improving the tribological properties of base oil. N-rGO has been characterized by different characterization techniques such as X-ray diffraction, scanning electron microscopy, transmission electron microscopy, X-ray photoelectron spectroscopy and Raman spectroscopy. N-rGO-based nanolubricants are prepared and their tribological properties are studied using a four-ball tester...
2017: Beilstein Journal of Nanotechnology
https://www.readbyqxmd.com/read/28899649/small-field-characterization-of-a-nanochamber-prototype-under-flattening-filter-free-photon-beams
#16
G Reggiori, A Stravato, P Mancosu, F Lobefalo, L Paganini, F Zucconi, V Palumbo, A Gaudino, M Scorsetti, S Tomatis
INTRODUCTION: Nanochambers present some advantages in terms of energy independence and absolute dose measurement for small field dosimetry in the SBRT scenario. Characterization of a micro-chamber prototype was carried out both under flattened and flattening-filter-free (FFF) beams with particular focus on stem effect. METHODS: The study included characterization of leakage and stem effects, dose rate and dose per pulse dependence, measurement of profiles, and percentage depth doses (PDDs)...
September 9, 2017: Physica Medica: PM
https://www.readbyqxmd.com/read/28899496/neem-azadirachta-indica-an-indian-traditional-panacea-with-modern-molecular-basis
#17
REVIEW
Subash Chandra Gupta, Sahdeo Prasad, Amit K Tyagi, Ajaikumar B Kunnumakkara, Bharat B Aggarwal
BACKGROUND: For centuries, agents derived from natural sources (mother nature), especially plants have been the primary source of medicine. Neem, also referred to as Azadirachta indica is one such plant that has been so named because it provides freedom from all diseases, and used for thousands of years in Indian and African continents. Different parts of the plant including flowers, leaves, seeds and bark have been used to treat both acute and chronic human diseases; and used as insecticide; antimicrobial, larvicidal, antimalarial, antibacterial, antiviral, and spermicidal...
October 15, 2017: Phytomedicine: International Journal of Phytotherapy and Phytopharmacology
https://www.readbyqxmd.com/read/28898442/bayesian-estimation-of-multivariate-normal-mixtures-with-covariate-dependent-mixing-weights-with-an-application-in-antimicrobial-resistance-monitoring
#18
Stijn Jaspers, Arnošt Komárek, Marc Aerts
Bacteria with a reduced susceptibility against antimicrobials pose a major threat to public health. Therefore, large programs have been set up to collect minimum inhibition concentration (MIC) values. These values can be used to monitor the distribution of the nonsusceptible isolates in the general population. Data are collected within several countries and over a number of years. In addition, the sampled bacterial isolates were not tested for susceptibility against one antimicrobial, but rather against an entire range of substances...
September 12, 2017: Biometrical Journal. Biometrische Zeitschrift
https://www.readbyqxmd.com/read/28895791/general-lack-of-correlations-between-age-and-signs-of-the-metabolic-syndrome-in-subjects-with-non-diabetic-fasting-glucose-values
#19
Harry G Preuss, Nate Mrvichin, Dallas Clouatre, Debasis Bagchi, Jeffrey M Preuss, Nicholas V Perricone, Anand Swaroop, Gilbert R Kaats
BACKGROUND: Insulin resistance and advancing age are well-recognized risk factors for metabolic syndrome. Recent reports indicate that fasting glucose levels in non-diabetic patients correlate appropriately with the development of certain elements in metabolic syndrome, which suggest a cause-effect relationship with insulin resistance. OBJECTIVE: The present investigation assessed whether a significant association exists between chronological age and various elements of metabolic syndrome in this same group of subjects possessing non-diabetic fasting glucose levels...
September 12, 2017: Journal of the American College of Nutrition
https://www.readbyqxmd.com/read/28893606/expression-of-stable-and-active-human-dna-topoisomerase-i-in-pichia-pastoris
#20
Mooi Kwai Chan, Shern Kwok Lim, Noorizan Miswan, Ai Lan Chew, Rahmah Noordin, Boon Yin Khoo
This study described the isolation of the coding region of human topoisomerase I (TopoI) from MDA-MB-231 and the expression of multiple copy recombinant genes in four Pichia pastoris strains. First, polymerase chain reaction (PCR)-amplification of the enzyme coding region was performed. The PCR fragment was cloned into pPICZ-α-A vector and sequenced. It was then transformed into X33, GS115, SMD1168H and KM71H strains of Pichia. PCR-screening for positive clones was performed, and estimation of multiple copy integrants in each yeast strain was carried out using agar plates containing increasing concentrations of Zeocin(®)...
September 8, 2017: Protein Expression and Purification
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