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https://www.readbyqxmd.com/read/28702916/risk-assessment-of-heavy-metals-in-soil-of-tongnan-district-southwest-china-evidence-from-multiple-indices-with-high-spatial-resolution-sampling
#1
Yongmei Ma, Zhongmin Jia, Siyue Li
Assessment of heavy metal (HM) pollution in soil is critical for human health, ecological remediation, and soil conservation. In this study, statistical analyses and geochemical approaches such as enrichment factor (EF), the index of geoaccumulation (Igeo), and potential ecological risk index (RI) were used for characterization and risk assessment of soil HMs through a high-spatial-resolution 385 samples from Tongnan District, an important agricultural practice area in Chongqing Municipality in Southwest China...
July 13, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/28693076/-high-mechanical-stretch-stress-promotes-degeneration-of-the-human-nucleus-pulposus-cells-through-nf-%C3%AE%C2%BAb-signaling-pathway
#2
S J Wang, Z Y Sun, C Liu, P Yan, H Liang, K Huang, D G Wang, Y Li, J W Tian
Objective: To investigate the effect of high mechanical stretch stress(HMS)on human nucleus pulposus cells and its regulatory mechanism. Methods: The non-degenerated nucleus pulposus tissue (Pfirrmann<grade Ⅲ) removed from the patient's surgery was harvested and the human nucleus pulposus cells were isolated and cultured. In the presence or absence of pretreatment with the NF-κB specific blocker Bay11-7082, the cultured human nucleus pulposus cells were loaded cyclic mechanical stretch stress(CMS) with different parameters using the Flexercell system...
July 4, 2017: Zhonghua Yi Xue za Zhi [Chinese medical journal]
https://www.readbyqxmd.com/read/28688995/catchment-scale-assessment-of-risk-posed-by-traffic-generated-heavy-metals-and-polycyclic-aromatic-hydrocarbons
#3
Yukun Ma, James McGree, An Liu, Kaveh Deilami, Prasanna Egodawatta, Ashantha Goonetilleke
Heavy metals (HMs) and polycyclic aromatic hydrocarbons (PAHs) are among the most toxic chemical pollutants present in urban stormwater. Consequently, urban stormwater reuse is constrained due to the human health risk posed by these pollutants. This study developed a scientifically robust approach to assess the risk to human health posed by HMs and PAHs in urban stormwater in order to enhance its reuse. Accordingly, an innovative methodology was created consisting of four stages: quantification of traffic and land use parameters; estimation of pollutant concentrations for model development; risk assessment, and risk map presentation...
July 6, 2017: Ecotoxicology and Environmental Safety
https://www.readbyqxmd.com/read/28683806/evaluating-the-effect-of-the-helping-mothers-survive-bleeding-after-birth-hms-bab-training-in-tanzania-and-uganda-study-protocol-for-a-randomised-controlled-trial
#4
Claudia Hanson, Andrea B Pembe, Fadhlun Alwy, Susan Atuhairwe, Sebalda Leshabari, Jessica Morris, Frank Kaharuza, Gaetano Marrone
BACKGROUND: Postpartum haemorrhage complicates approximately 10% of all deliveries and contributes to at least a quarter of all maternal deaths worldwide. The competency-based Helping Mothers Survive Bleeding after Birth (HMS BAB) training was developed to support evidence-based management of postpartum haemorrhage. This one-day training includes low-cost MamaNatalie® birthing simulators and addresses both prevention and first-line treatment of haemorrhage. While evidence is accumulating that the training improves health provider's knowledge, skills and confidence, evidence is missing as to whether this translates into improved practices and reduced maternal morbidity and mortality...
July 6, 2017: Trials
https://www.readbyqxmd.com/read/28678633/the-influence-of-heavy-metals-on-the-bioremediation-of-polycyclic-aromatic-hydrocarbons-in-aquatic-system-by-a-bacterial-fungal-consortium
#5
Xiao-Kui Ma, Ting-Ting Li, Hala Farm, Eric Charles Peterson, Wei-Wei Zhao, Wenying Guo, Bo Zhou
Co-contamination of polycyclic aromatic hydrocarbons (PAHs) with heavy metals (HMs) in aquatic environments is a global threat, however, little is understood about PAH biodegradation in these sites. In this study, PAHs biodegradation in the presence of HMs in water by a metal tolerant consortium composed of Bacillus subtilis and fungus Acremonium sp. was investigated. The consortium demonstrated higher tolerance to the tested HMs (Fe(2+), Al(3+), Ni(2+), Cu(2+), Mn(2+), Zn(2+)) than the individual consortium components, and the tolerance to individual metals decreased with increasing metal concentrations...
July 5, 2017: Environmental Technology
https://www.readbyqxmd.com/read/28676256/neurotoxicity-of-propofol-on-rat-hypoglossal-motoneurons-in-vitro
#6
Laura Monni, Filippo Ghezzi, Silvia Corsini, Andrea Nistri
Although propofol is a widely used intravenous general anaesthetic, many studies report its toxic potential, particularly on the developing central nervous system. We investigated its action on hypoglossal motoneurons (HMs) that control two critical functions in neonates, namely tongue muscle activity and airway patency. Thus, clinically relevant concentrations of propofol (1 and 5μM) were applied (4h) to neonatal rat brainstem slices to evaluate the expression of apoptosis-inducing factor (AIF) as biomarker of toxicity...
July 1, 2017: Neuroscience Letters
https://www.readbyqxmd.com/read/28675423/poly-pharmacokinetic-study-of-a-multicomponent-herbal-medicine-in-healthy-chinese-volunteers
#7
Guoxiang Xie, Shouli Wang, Hua Zhang, Aihua Zhao, Jiajian Liu, Yueming Ma, Ke Lan, Yan Ni, Changxiao Liu, Ping Liu, Tianlu Chen, Wei Jia
The advent of mass spectrometry based analytical technologies coupled with multivariate statistical methods offers tremendous new opportunities for understanding the pharmacokinetics (PK) of multicomponent herbal medicines (HMs). We recently proposed a Poly-PK strategy to characterize the concentration-time profile and the metabolic response profile of multicomponent HMs, using an integrated phytochemical and metabolomics approach. Here, we provided the first example of the Poly-PK strategy, where we simultaneously characterized the PK as well as the metabolic response profiles of a Chinese herbal medicine, Huangqi decoction (HQD, consisting of Radix Astragali and Radix Glycyrrhizae), in healthy Chinese volunteers...
July 4, 2017: Clinical Pharmacology and Therapeutics
https://www.readbyqxmd.com/read/28670772/the-ca-2-cam2-binding-transcription-factor-tga3-elevates-lcd-expression-and-h2-s-production-to-bolster-cr-6-tolerance-in-arabidopsis
#8
Huihui Fang, Zhiqiang Liu, Yanping Long, Yali Liang, Zhuping Jin, Liping Zhang, Danmei Liu, Hua Li, Jixian Zhai, Yanxi Pei
Heavy metals (HMs) contamination on agricultural lands not only reduces crop yield but also causes human health concerns. As a plant gasotransmitter, hydrogen sulfide (H2 S) can trigger various defense responses and help reduce HMs accumulation in plants; however, little is known about the regulatory mechanisms of H2 S signaling. Here, we provided evidence to answer the long-standing question how H2 S production is elevated in plant defense against HMs stress. During Arabidopsis' response to chromium (Cr(6+) ) stress, the transcription of L-cysteine desulfhydrase (LCD), the key enzyme for H2 S production, was enhanced through the calcium (Ca(2+) )/calmodulin2 (CaM2)-mediated pathway...
July 3, 2017: Plant Journal: for Cell and Molecular Biology
https://www.readbyqxmd.com/read/28668425/early-liver-metastases-in-resectable-periampullary-cancer-incidence-and-risk-factors
#9
A S Guerard, A Ayav, H Busby, M Lafitte, H Rousseau, V Laurent
PURPOSE: The aim of the present study was to estimate the incidence of very early hepatic metastases (HMs) (<6 months) and their imaging patterns after cephalic duodenopancreatectomy (CDP) for periampullary carcinoma (excluding duodenal carcinoma) and to identify their associated risk factors. METHODS: From January 2003 to June 2016, all patients who underwent surgical treatment for periampullary carcinoma by CDP at our institution and with adequate pre- and postoperative CT scans were included...
August 2017: European Journal of Radiology
https://www.readbyqxmd.com/read/28656577/ecological-risk-assessment-of-heavy-metals-and-polycyclic-aromatic-hydrocarbons-in-sediments-of-rivers-niger-and-benue-confluence-lokoja-central-nigeria
#10
Nwachukwu Ekere, Newman Yakubu, Janefrances Ihedioha
The concentrations of six heavy metals (HMs) and 16 US EPA priority polycyclic aromatic hydrocarbons (PAHs) in sediment samples of the confluence of rivers Niger and Benue were investigated. The ecological risk assessment of the contaminants was carried out. The results showed that the sediment samples were heavily polluted with iron and moderately polluted with Cd while other metals posed no pollution problem when compared with USEPA sediment quality guidelines. Only six out of the 16 priority PAHs were detected in the samples, and source apportionment of the PAHs indicated that they are of pyrogenic origin...
June 27, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/28654155/incidence-of-hematologic-malignancy-and-cause-specific-mortality-in-the-women-s-health-initiative-randomized-controlled-trial-of-calcium-and-vitamin-d-supplementation
#11
Eric M Ammann, Matthew T Drake, Bjarni Haraldsson, Robert B Wallace, Karen C Johnson, Pinkal Desai, Emily M Lin, Brian K Link
BACKGROUND: Prior evidence of a possible link between vitamin D status and hematologic malignancy (HM) in humans comes from observational studies, leaving unresolved the question of whether a true causal relationship exists. METHODS: The authors performed a secondary analysis of data from the Women's Health Initiative Calcium/Vitamin D (CaD) trial, a large randomized controlled trial of CaD supplementation compared with placebo in older women. Kaplan-Meier and Cox proportional hazards survival analysis methods were used to evaluate the relationship between treatment assignment and 1) incident HM and 2) HM-specific mortality over 10 years following randomization...
June 27, 2017: Cancer
https://www.readbyqxmd.com/read/28651129/catalytic-upgrading-of-bio-products-derived-from-pyrolysis-of-red-macroalgae-gracilaria-gracilis-with-a-promising-novel-micro-mesoporous-catalyst
#12
Omid Norouzi, Ahmad Tavasoli, Sajedeh Jafarian, Sasan Esmailpour
Conversion of Gracilaria gracilis (G. gracilis) into bio-products was carried out via pyrolysis at different temperatures to determine its potential for phenol-rich bio-oil. Co-Mo supported on zeolites (HZSM-5), mesoporous (HMS) catalysts and their composites (ZH) were investigated and compared to each other on catalytic pyrolysis processes. In non-catalytic tests, the maximum weight percentage of bio-oil was 42wt% at 500°C and had the maximum amount of phenol (6.28wt%). in the catalytic tests by ZH composites; the addition of zeolite content in the structure of composites significantly decreased total concentrations of acetic acid and formic acid from 9...
June 16, 2017: Bioresource Technology
https://www.readbyqxmd.com/read/28645171/upsetr-an-r-package-for-the-visualization-of-intersecting-sets-and-their-properties
#13
Jake R Conway, Alexander Lex, Nils Gehlenborg
Motivation: Venn and Euler diagrams are a popular yet inadequate solution for quantitative visualization of set intersections. A scalable alternative to Venn and Euler diagrams for visualizing intersecting sets and their properties is needed. Results: We developed UpSetR, an open source R package that employs a scalable matrix-based visualization to show intersections of sets, their size, and other properties. Availability: UpSetR is available at https://github...
June 22, 2017: Bioinformatics
https://www.readbyqxmd.com/read/28639135/histological-verification-of-the-usefulness-of-magnifying-endoscopy-with-narrow-band-imaging-for-horizontal-margin-diagnosis-of-differentiated-type-early-gastric-cancers
#14
Makomo Makazu, Kingo Hirasawa, Chiko Sato, Ryosuke Ikeda, Takehide Fukuchi, Yasuaki Ishii, Ryosuke Kobayashi, Hiroaki Kaneko, Masataka Taguri, Yoko Tateishi, Yoshiaki Inayama, Shin Maeda
BACKGROUND: Although magnifying endoscopy with narrow-band imaging (ME-NBI) can help identify the horizontal margin (HM) of early gastric cancer (EGC), little is known about the factors that can clarify the HM by using ME-NBI. We aimed to characterize the pathological features of lesions in which the HM was identified using ME-NBI. METHODS: The HMs of 639 differentiated-type EGCs treated with endoscopic submucosal dissection or surgery were analyzed using conventional endoscopy and ME-NBI...
June 21, 2017: Gastric Cancer
https://www.readbyqxmd.com/read/28638144/on-the-interaction-of-toxic-heavy-metals-cd-hg-pb-with-graphene-quantum-dots-and-infinite-graphene
#15
Ivan Shtepliuk, Nuala M Caffrey, Tihomir Iakimov, Volodymyr Khranovskyy, Igor A Abrikosov, Rositsa Yakimova
The promise of graphene and its derivatives as next generation sensors for real-time detection of toxic heavy metals (HM) requires a clear understanding of behavior of these metals on the graphene surface and response of the graphene to adsorption events. Our calculations herein were focused on the investigation of the interaction between three HMs, namely Cd, Hg and Pb, with graphene quantum dots (GQDs). We determine binding energies and heights of both neutral and charged HM ions on these GQDs. The results show that the adsorption energy of donor-like physisorbed neutral Pb atoms is larger than that of either Cd or Hg...
June 21, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28635625/soil-moisture-content-estimation-based-on-sentinel-1-and-auxiliary-earth-observation-products-a-hydrological-approach
#16
Dimitrios D Alexakis, Filippos-Dimitrios K Mexis, Anthi-Eirini K Vozinaki, Ioannis N Daliakopoulos, Ioannis K Tsanis
A methodology for elaborating multi-temporal Sentinel-1 and Landsat 8 satellite images for estimating topsoil Soil Moisture Content (SMC) to support hydrological simulation studies is proposed. After pre-processing the remote sensing data, backscattering coefficient, Normalized Difference Vegetation Index (NDVI), thermal infrared temperature and incidence angle parameters are assessed for their potential to infer ground measurements of SMC, collected at the top 5 cm. A non-linear approach using Artificial Neural Networks (ANNs) is tested...
June 21, 2017: Sensors
https://www.readbyqxmd.com/read/28617431/nicotine-protects-rat-hypoglossal-motoneurons-from-excitotoxic-death-via-downregulation-of-connexin-36
#17
Silvia Corsini, Maria Tortora, Rossana Rauti, Andrea Nistri
Motoneuron disease including amyotrophic lateral sclerosis may be due, at an early stage, to deficit in the extracellular clearance of the excitatory transmitter glutamate. A model of glutamate-mediated excitotoxic cell death based on pharmacological inhibition of its uptake was used to investigate how activation of neuronal nicotinic receptors by nicotine may protect motoneurons. Hypoglossal motoneurons (HMs) in neonatal rat brainstem slices were exposed to the glutamate uptake blocker DL-threo-β-benzyloxyaspartate (TBOA) that evoked large Ca(2+) transients time locked among nearby HMs, whose number fell by about 30% 4 h later...
June 15, 2017: Cell Death & Disease
https://www.readbyqxmd.com/read/28617267/removal-of-cadmium-and-zinc-from-contaminated-wastewater-using-rhodobacter-sphaeroides
#18
Xiaomin Li, Weihua Peng, Yingying Jia, Lin Lu, Wenhong Fan
Rhodobacter sphaeroides was used for bioremediation of wastewater polluted with cadmium (Cd) and zinc (Zn). The tolerance of the microorganism to selected heavy metals (HMs), as well as the effects of pH, temperature and inoculum size on the removal rate, was investigated. The remediation effects of R. sphaeroides were analysed at different initial concentrations of HMs. Bioremediation mechanisms were thoroughly discussed based on the results from the cell characterisation analysis. Cd and Zn could inhibit the growth of R...
June 2017: Water Science and Technology: a Journal of the International Association on Water Pollution Research
https://www.readbyqxmd.com/read/28591145/successful-implementation-of-helping-babies-survive-and-helping-mothers-survive-programs-an-utstein-formula-for-newborn-and-maternal-survival
#19
Hege L Ersdal, Nalini Singhal, Georgina Msemo, Ashish Kc, Santorino Data, Nester T Moyo, Cherrie L Evans, Jeffrey Smith, Jeffrey M Perlman, Susan Niermeyer
Globally, the burden of deaths and illness is still unacceptably high at the day of birth. Annually, approximately 300.000 women die related to childbirth, 2.7 million babies die within their first month of life, and 2.6 million babies are stillborn. Many of these fatalities could be avoided by basic, but prompt care, if birth attendants around the world had the necessary skills and competencies to manage life-threatening complications around the time of birth. Thus, the innovative Helping Babies Survive (HBS) and Helping Mothers Survive (HMS) programs emerged to meet the need for more practical, low-cost, and low-tech simulation-based training...
2017: PloS One
https://www.readbyqxmd.com/read/28578402/using-bamboo-biochar-with-compost-for-the-stabilization-and-phytotoxicity-reduction-of-heavy-metals-in-mine-contaminated-soils-of-china
#20
Amjad Ali, Di Guo, Yue Zhang, Xining Sun, Shuncheng Jiang, Zhanyu Guo, Hui Huang, Wen Liang, Ronghua Li, Zengqiang Zhang
Anthropogenic activities have transformed the global geochemical cycling of heavy metals (HMs). Many physical, chemical and biological methods are used to reduce the toxicity of HMs to humans, plants and environment. This study aimed to investigate the immobilization and phytotoxicity reduction of HMs after application of bamboo biochar (BB) in mine-polluted soil in Feng county (FC) and Tongguan (TG). The results showed that BB application to contaminated soil immobilized HMs (Zn, Pb, Cd and Cu). The soil pH and EC increased and the bioavailability of HMs decreased in FC and TG, whereas Pb and Cu increased in TG soil...
June 2, 2017: Scientific Reports
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