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https://www.readbyqxmd.com/read/29136606/heavy-metals-in-soils-of-hechuan-county-in-the-upper-yangtze-sw-china-comparative-pollution-assessment-using-multiple-indices-with-high-spatial-resolution-sampling
#1
Maofei Ni, Rong Mao, Zhongmin Jia, Ruozhu Dong, Siyue Li
In order to assess heavy metals (HMs) in soils of the upper Yangtze Basin, a very high-spatial-resolution sampling (582 soil samples) was conducted from Hechuan County, an important agricultural practice area in the Southwest China. Multiple indices including geoaccumulation index (Igeo), enrichment factor (EF), sediment pollution index (SPI) and risk index (RI), as well as multivariate statistics were employed for pollution assessment and source identification of HMs in soils. Our results demonstrated that the averages of eight HMs decreased in the following order: Zn (82...
November 11, 2017: Ecotoxicology and Environmental Safety
https://www.readbyqxmd.com/read/29123678/rare-earth-based-quaternary-heusler-compounds-mcovz-m-lu-y-z-si-ge-with-tunable-band-characteristics-for-potential-spintronic-applications
#2
Xiaotian Wang, Zhenxiang Cheng, Guodong Liu, Xuefang Dai, Rabah Khenata, Liying Wang, Abdelmadjid Bouhemadou
Magnetic Heusler compounds (MHCs) have recently attracted great attention since these types of material provide novel functionalities in spintronic and magneto-electronic devices. Among the MHCs, some compounds have been predicted to be spin-filter semiconductors [also called magnetic semiconductors (MSs)], spin-gapless semiconductors (SGSs) or half-metals (HMs). In this work, by means of first-principles calculations, it is demonstrated that rare earth-based equiatomic quaternary Heusler (EQH) compounds with the formula MCoVZ (M = Lu, Y; Z = Si, Ge) are new spin-filter semiconductors with total magnetic moments of 3 µB...
November 1, 2017: IUCrJ
https://www.readbyqxmd.com/read/29121606/pattern-of-hematological-malignancies-in-adolescents-and-young-adults-in-bangladesh
#3
Md Mahbub Hasan, Enayetur Raheem, Tanvira Afroze Sultana, Mohammad Sorowar Hossain
INTRODUCTION: The adolescent and young adult (AYA) age group (15-39 years) bears distinct characteristics in terms of cancer biology, long-term health and treatment-related complications and psychosocial aspects. The overall scenario of cancer including hematological malignancies (HMs) is largely unknown in Bangladesh, where a significant proportion of people (44% of total population) belong to AYA age group. This study aims to describe the patterns of HM among AYA in the context of Bangladesh METHODS: Two previously published datasets (on hematological malignancies and childhood and adolescent cancer) were merged to construct a comprehensive dataset focusing exclusively on HMs in AYA age group...
November 6, 2017: Cancer Epidemiology
https://www.readbyqxmd.com/read/29121568/a-metabolic-exposure-oriented-network-regulation-strategy-for-the-identification-of-effective-combination-in-the-extract-of-ginkgo-biloba-l
#4
Xin-Guang Liu, Cai-Yi Cheng, Ji-Xin Wang, Hong Luo, Li-Fan Tu, Lin Lin, Bin Wu, Hui-Ying Wang, Ke Liu, Ping Li, Hua Yang
Nowadays, network pharmacology-based methods were increasing proposed to screen synergistic or combinatorial compounds from herbal medicines (HMs), while these researches mainly focused on structural prediction or experiment-based interaction between single compound and target protein. The proportion of each chemical in the nature and their metabolic process was ignored, which might decide an optimized composition for their synergistic effect. To exact the effective combination of HMs, a metabolic distribution-oriented network regulation strategy was developed for the identification of effective combination...
November 6, 2017: Journal of Pharmaceutical and Biomedical Analysis
https://www.readbyqxmd.com/read/29118858/characteristics-and-predictors-of-mortality-of-patients-with-hematologic-malignancies-requiring-invasive-mechanical-ventilation
#5
Hasan M Al-Dorzi, Haya Al Orainni, Faten Al Eid, Haytham Tlayjeh, Abedalrahman Itani, Ayman Al Hejazi, Yaseen M Arabi
RATIONALE: Acute respiratory failure (ARF) may complicate the course of hematologic malignancies (HMs). Our objective was to study the characteristics, outcomes and predictors of mortality of patients with HMs who required intubation for ARF. METHODS: This retrospective cohort study evaluated all patients with HMs who were admitted to the Intensive Care Unit (ICU) of King Abdul-Aziz Medical City-Riyadh between 2008 and 2013 and required invasive mechanical ventilation...
October 2017: Annals of Thoracic Medicine
https://www.readbyqxmd.com/read/29114656/insights-into-the-origin-of-the-excited-transitions-in-graphene-quantum-dots-interacting-with-heavy-metals-in-different-media
#6
Ivan Shtepliuk, Volodymyr Khranovskyy, Rositsa Yakimova
Exploring graphene quantum dots (GQDs) is an attractive way to design novel optical and electrochemical sensors for fast and reliable detection of toxic heavy metals (HMs), such as Cd, Hg and Pb. There are two main strategies for achieving this: (i) surface modification of an electrochemical working electrode by nanoscale GQDs and (ii) using a GQD solution electrolyte for optical sensing. Further development of these sensing technologies towards reaching or exceeding the WHO permissible limits implies deep understanding of the interaction between GQDs and HMs in different dielectric media...
November 8, 2017: Physical Chemistry Chemical Physics: PCCP
https://www.readbyqxmd.com/read/29097738/pharmacologically-induced-reversible-hypometabolic-state-mitigates-radiation-induced-lethality-in-mice
#7
Subhajit Ghosh, Namita Indracanti, Jayadev Joshi, Jharna Ray, Prem Kumar Indraganti
Therapeutic hypothermia has proven benefits in critical care of a number of diseased states, where inflammation and oxidative stress are the key players. Here, we report that adenosine monophosphate (AMP) triggered hypometabolic state (HMS), 1-3 hours after lethal total body irradiation (TBI) for a duration of 6 hours, rescue mice from radiation-induced lethality and this effect is mediated by the persistent hypothermia. Studies with caffeine and (6)N-cyclohexyladenosine, a non-selective antagonist and a selective agonist of adenosine A1 receptor (A1AR) respectively, indicated the involvement of adenosine receptor (AR) signaling...
November 2, 2017: Scientific Reports
https://www.readbyqxmd.com/read/29082587/effectiveness-and-safety-of-polidocanol-for-the-treatment-of-hemangiomas-and-vascular-malformations-a-meta-analysis
#8
REVIEW
Zhi Gao, Yi Zhang, Wei Li, Chen Shi
A meta-analysis was conducted to investigate the efficacy and safety of polidocanol versus other conventional therapies in treating hemangiomas (HMs) and vascular malformations (VMs). Literature search was conducted in the Cochrane, Embase, PubMed, Web of Science, CNKI, CBM, VIP, and WanFang databases until March 5, 2017. A meta-analysis was conducted using Revman 5.3 software. A total of 19 randomized controlled trials (RCTs) involving 1,514 participants met the inclusion criteria. Regarding the effectiveness, statistically significant differences were observed between polidocanol and all the independent treatments (p = ...
October 30, 2017: Dermatologic Therapy
https://www.readbyqxmd.com/read/29073559/effect-of-pyrolysis-temperature-on-chemical-form-behavior-and-environmental-risk-of-zn-pb-and-cd-in-biochar-produced-from-phytoremediation-residue
#9
Hui Huang, Wenlin Yao, Ronghua Li, Amjad Ali, Juan Du, Di Guo, Ran Xiao, Zhanyu Guo, Zengqiang Zhang, Mukesh Kumar Awasthi
This study aimed to evaluate the chemical forms, behavior and environmental risk of heavy metal (HMs) Zn, Pb and Cd in phytoremediation residue (PMR) pyrolyzed at 350 °C, 550 °C and 750 °C, respectively. The behavior of HMs variation during the PMR pyrolysis process was analyzed and the potential HMs environmental risk of phytoremediation residue biochars (PMB) was assessed which was seldom investigated before. The results showed that the pyrolysis temperature increase decreased the soluble/exchangeable HMs fraction and alleviated the HMs bioavailability...
October 7, 2017: Bioresource Technology
https://www.readbyqxmd.com/read/29069620/propofol-protects-rat-hypoglossal-motoneurons-in-an-in-vitro-model-of-excitotoxicity-by-boosting-gabaergic-inhibition-and-reducing-oxidative-stress
#10
Filippo Ghezzi, Laura Monni, Silvia Corsini, Rossana Rauti, Andrea Nistri
In brainstem motor networks, hypoglossal motoneurons (HMs) play the physiological role of driving tongue contraction, an activity critical for inspiration, phonation, chewing and swallowing. HMs are an early target of neurodegenerative diseases like amyotrophic lateral sclerosis that, in its bulbar form, is manifested with initial dysphagia and dysarthria. One important pathogenetic component of this disease is the high level of extracellular glutamate due to uptake block that generates excitotoxicity. To understand the earliest phases of this condition we devised a model, the rat brainstem slice, in which block of glutamate uptake is associated with intense bursting of HMs, dysmetabolism and death...
October 22, 2017: Neuroscience
https://www.readbyqxmd.com/read/29059959/retinal-hemorrhage-detection-by-rule-based-and-machine-learning-approach
#11
Di Xiao, Shuang Yu, Janardhan Vignarajan, Dong An, Mei-Ling Tay-Kearney, Yogi Kanagasingam
Robust detection of hemorrhages (HMs) in color fundus image is important in an automatic diabetic retinopathy grading system. Detection of the hemorrhages that are close to or connected with retinal blood vessels was found to be challenge. However, most methods didn't put research on it, even some of them mentioned this issue. In this paper, we proposed a novel hemorrhage detection method based on rule-based and machine learning methods. We focused on the improvement of detection of the hemorrhages that are close to or connected with retinal blood vessels, besides detecting the independent hemorrhage regions...
July 2017: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/29054646/heavy-metal-accumulation-and-health-risk-assessment-in-soil-wheat-system-under-different-nitrogen-levels
#12
Yang Zhang, Changbin Yin, Suzhen Cao, Leilei Cheng, Guosheng Wu, Jianbiao Guo
Heavy metal(loid)s (HMs) in organic fertilizer have become a primary source of HMs pollution of farmlands, which could cause deleterious health effects in people exposed through soil-plant systems via multi-pathways. This study investigated China's main grain production area (Henan Province) to evaluate the accumulation and transport characteristics of HMs (Cr, Mn, Ni, Cu, Zn, As, Cd and Pb) in a soil-wheat system and conduct a health risk assessment for wheat (Triticum aestivum) grain under different nitrogenous fertilizer treatments...
October 17, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/29050533/insights-into-the-pollutant-removal-performance-and-dom-characteristics-of-stormwater-runoff-during-grassy-swales-treatment
#13
Dong-Hai Yuan, Jiang-Wei He, Chong-Wei Li, Xu-Jing Guo, Ying Xiong, Chen-Ling Yan
The water-purification performance of grassy swales for treating stormwater road runoff was evaluated using a simulated experimental device in two different seasons. The results showed that the removal rates for total suspended solids (TSS), chemical oxygen demand (COD), total nitrogen (TN) and total phosphorus (TP) reached 89.90%, 56.71%, 32.37%, and 19.67%, respectively, in summer, and 34.09%, 7.75%, 56.71%, and 13.33%, respectively, in winter, suggesting that grassy swales showed higher water purification performance in summer than in winter...
October 20, 2017: Environmental Technology
https://www.readbyqxmd.com/read/28993772/rescuing-self-transient-isolation-and-autologous-transplantation-of-bone-marrow-mitigates-radiation-induced-hematopoietic-syndrome-and-mortality-in-mice
#14
Subhajit Ghosh, Namita Indracanti, Jayadev Joshi, Prem Kumar Indraganti
The inflamed bone marrow niche shortly after total body irradiation (TBI) is known to contribute to loss of hematopoietic stem cells in terms of their number and function. In this study, autologous bone marrow transfer (AL-BMT) was evaluated as a strategy for mitigating hematopoietic form of the acute radiation syndrome by timing the collection phase (2 h after irradiation) and reinfusion (24 h after irradiation) using mice as a model system. Collection of bone marrow (BM) cells (0.5 × 10(6) total marrow cells) 2 h after lethal TBI rescued different subclasses of hematopoietic stem and progenitor cells (HSPCs) from the detrimental inflammatory and damaging milieu in vivo...
2017: Frontiers in Immunology
https://www.readbyqxmd.com/read/28984345/changes-in-the-hematopoietic-system-and-blood-under-the-influence-of-heavy-metal-salts-can-be-reduced-with-vitamin-e
#15
Anatolii Romaniuk, Mykola Lyndin, Yulia Lуndіna, Vladyslav Sikora, Natalia Hrintsova, Olena Timakova, Olena Gudymenko, Oksana Gladchenko
OBJECTIVE: The aim of our work was to study the blood parameters and bone marrow morphological changes in rats exposed to increased amounts of heavy metal salts and the effect of vitamin E. MATERIAL AND METHOD: Investigation of bone marrow structural features and blood parameters was performed in sexually mature Wistar male rats (n=84). RESULTS: Exposure to increased amounts of heavy metal salts led to the inhibition of erythropoiesis and leukopoiesis, as well as a synchronized increase in the number of megakaryocytes which was clearly reflected in the blood: the number of erythrocytes, leukocytes and Hb decreased, and the number of platelets increased...
October 6, 2017: Türk Patoloji Dergisi
https://www.readbyqxmd.com/read/28974007/modeling-of-chromium-copper-zinc-arsenic-and-lead-using-portable-x-ray-fluorescence-spectrometer-based-on-discrete-wavelet-transform
#16
Fang Li, Anxiang Lu, Jihua Wang
A modeling method based on discrete wavelet transform (DWT) was introduced to analyze the concentration of chromium, copper, zinc, arsenic and lead in soil with a portable X-ray fluorescence (XRF) spectrometer. A total of 111 soil samples were collected and observed. Denoising and baseline correction were performed on each spectrum before modeling. The optimum conditions for pre-processing were denoising with Coiflet 3 on the 3rd level and baseline correction with Coiflet 3 on the 9th level. Calibration curves were established for the five heavy metals (HMs)...
September 30, 2017: International Journal of Environmental Research and Public Health
https://www.readbyqxmd.com/read/28965077/lead-removal-by-a-magnetic-biochar-derived-from-persulfate-zvi-treated-sludge-together-with-one-pot-pyrolysis
#17
Yi-di Chen, Shih-Hsin Ho, Dawei Wang, Zong-Su Wei, Jo-Shu Chang, Nan-Qi Ren
In this study, a novel method to treat the persulfate-ZVI dewatered WAS by producing a magnetic biochar as an environmentally friendly biosorbent (nZVI-WSBC) to remove heavy metals (HMs) from wastewaters was proposed. The nZVI-WSBC exhibited good adsorption property of Pb(2+) and the adsorption isotherm data were fitted well to Langmuir isotherm. Corresponding reaction kinetics fitted well with the pseudo second-order adsorption model. Notably, nZVI-WSBC was successfully used for efficient removal of HMs from real...
September 20, 2017: Bioresource Technology
https://www.readbyqxmd.com/read/28960556/incidence-of-pyrrolizidine-alkaloids-in-herbal-medicines-from-german-retail-markets-risk-assessments-and-implications-to-consumers
#18
Emmanuel Letsyo, Gerold Jerz, Peter Winterhalter, Rainer Lindigkeit, Till Beuerle
The occurrence of potentially toxic pyrrolizidine alkaloids (PAs) in herbal medicines (HMs) is currently intensely being discussed in Europe. Pyrrolizidine alkaloids, particularly the 1,2-unsaturated PAs, are undesired compounds in HMs due to their potential hepatotoxic and carcinogenic properties. In this study, 98 widely patronized HMs from six popular German retail supermarkets/drugstores, as well as from pharmacies, were analyzed by high-performance liquid chromatography-electrospray ionization-tandem mass spectrometry for the presence of PAs...
September 28, 2017: Phytotherapy Research: PTR
https://www.readbyqxmd.com/read/28960063/biomass-burning-smoke-climatology-of-the-united-states-implications-for-particulate-matter-air-quality
#19
Aaron S Kaulfus, Udaysankar Nair, Daniel Jaffe, Sundar A Christopher, Scott Goodrick
We utilize the NOAA Hazard Mapping System smoke product for the period of 2005 to 2016 to develop climatology of smoke occurrence over the Continental United States (CONUS) region and to study the impact of wildland fires on particulate matter air quality at the surface. Our results indicate that smoke is most frequently found over the Great Plains and western states during the summer months. Other hotspots of smoke occurrence are found over state and national parks in the southeast during winter and spring, in the Gulf of Mexico southwards of the Texas and Louisiana coastline during spring season and along the Mississippi River Delta during the fall season...
September 29, 2017: Environmental Science & Technology
https://www.readbyqxmd.com/read/28946087/beneficial-effect-of-mixture-of-additives-amendment-on-enzymatic-activities-organic-matter-degradation-and-humification-during-biosolids-co-composting
#20
Mukesh Kumar Awasthi, Quan Wang, Hongyu Chen, Sanjeev Kumar Awasthi, Meijing Wang, Xiuna Ren, Junchao Zhao, Zengqiang Zhang
The objective of this study was to identify the effect of mixture of additives to improve the enzymatic activities, organic matter humification and diminished the bioavailability of heavy metals (HMs) during biosolids co-composting. In this study, zeolite (Z) (10%, 15% and 30%) with 1%lime (L) (dry weight basis of biosolids) was blended into the mixture of biosolids and wheat straw, respectively. The without any amendment and 1%lime applied treatments were run for comparison (Control). The Z+L addition resulted rapid organic matter degradation and humification with maximum enzymatic activities...
September 9, 2017: Bioresource Technology
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