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https://www.readbyqxmd.com/read/29778083/performance-of-single-pass-and-by-pass-multi-step-multi-soil-layering-systems-for-low-c-n-ratio-polluted-river-water-treatment
#1
Cai-Jie Wei, Wei-Zhong Wu
Two kinds of hybrid two-step multi-soil-layering (MSL) systems loaded with different filter medias (zeolite-ceramsite MSL-1 and ceramsite-red clay MSL-2) were set-up for the low-(C/N)-ratio polluted river water treatment. A long-term pollutant removal performance of these two kinds of MSL systems was evaluated for 214 days. By-pass was employed in MSL systems to evaluate its effect on nitrogen removal enhancement. Zeolite-ceramsite single-pass MSL-1 system owns outstanding ammonia removal capability (24 g NH4 + -Nm-2 d-1 ), 3 times higher than MSL-2 without zeolite under low aeration rate condition (0...
May 7, 2018: Chemosphere
https://www.readbyqxmd.com/read/29778082/a-review-of-the-impacts-of-tobacco-heating-system-on-indoor-air-quality-versus-conventional-pollution-sources
#2
REVIEW
Violeta Kaunelienė, Marija Meišutovič-Akhtarieva, Dainius Martuzevičius
With the introduction of novel and potentially less polluting nicotine containing products to the market, the impacts of their usage to indoor air quality as opposed to conventional pollution sources must be reviewed and considered. This review study aimed to comparatively analyse changes in indoor air quality as the consequence of tobacco heating system (THS) generated pollution against general indoor air quality in various micro-environments, especially with combustion-based pollution sources present. Indoor concentrations of formaldehyde, acetaldehyde, benzene, toluene, nicotine and PM2...
May 8, 2018: Chemosphere
https://www.readbyqxmd.com/read/29778081/molecular-aspect-of-silver-nanoparticles-regulated-embryonic-development-in-zebrafish-danio-rerio-by-oct-4-expression
#3
Biplab Sarkar, Suresh K Verma, Javed Akhtar, Surya Prakash Netam, Sanjay Kr Gupta, Pritam Kumar Panda, Koel Mukherjee
With the enhancement of commercial manifestation of silver nanoparticles, concerned has risen on their accumulation in aquatic system and consequent effects on fish development and metabolism. In this study, experiments were conducted to assess the impacts of silver nanoparticles on early life cycles of fish considering Zebrafish (Danio rerio) as experimental model. Silver nanoparticles were synthesized through chemical reduction method and characterized through UV-visible spectroscopy, dynamic light scattering (DLS), and HR-TEM...
May 4, 2018: Chemosphere
https://www.readbyqxmd.com/read/29778080/atrazine-xenobiotic-nuclear-receptor-interactions-induce-cardiac-inflammation-and-endoplasmic-reticulum-stress-in-quail-coturnix-coturnix-coturnix
#4
Xue-Nan Li, Yu-Zhu Zuo, Lei Qin, Wei Liu, Yan-Hua Li, Jin-Long Li
Atrazine (ATR) is one of the most extensively used herbicide that eventually leaches into groundwater and surface water from agricultural areas. Exposure to ATR does harm to the health of human and animals, especially the heart. However, ATR exposure caused cardiotoxicity in bird remains unclear. To evaluate ATR-exerted potential cardiotoxicity in heart, quail were exposed with 0, 50, 250, and 500 mg/kg BW/day ATR by gavage treatment for 45 days. Cardiac histopathological alternation was observed in ATR-induced quail...
May 9, 2018: Chemosphere
https://www.readbyqxmd.com/read/29778067/succession-of-bacterial-and-fungal-communities-within-biofilms-of-a-chlorinated-drinking-water-distribution-system
#5
I Douterelo, K E Fish, J B Boxall
Understanding the temporal dynamics of multi-species biofilms in Drinking Water Distribution Systems (DWDS) is essential to ensure safe, high quality water reaches consumers after it passes through these high surface area reactors. This research studied the succession characteristics of fungal and bacterial communities under controlled environmental conditions fully representative of operational DWDS. Microbial communities were observed to increase in complexity after one month of biofilm development but they did not reach stability after three months...
May 3, 2018: Water Research
https://www.readbyqxmd.com/read/29778046/evaluation-of-the-microhaplotypes-panel-for-dna-mixture-analyses
#6
Peng Chen, Caiyong Yin, Zheng Li, Yan Pu, Youjia Yu, Peng Zhao, Dexin Chen, Weibo Liang, Lin Zhang, Feng Chen
The identification of a suspect in a DNA mixture typed with the standard short tandem repeat polymorphism (STR) kits has faced challenges. Several improved methods or technologies have been introduced to address this issue. However, some complex situations in the process remain elusive. In the present study, we presented a panel of 26 tiny microhaplotypes, each generating a relatively high (>3.0) effective number of alleles (Ae ) and possessing low (<50 bp) sequence lengths. The average Ae and heterozygosity values among the 9 populations of 26 microhaps were in ranges from 2...
May 12, 2018: Forensic Science International. Genetics
https://www.readbyqxmd.com/read/29778045/massively-parallel-sequencing-of-124-snps-included-in-the-precision-id-identity-panel-in-three-east-asian-minority-ethnicities
#7
Jing Liu, Zheng Wang, Guanglin He, Xueying Zhao, Mengge Wang, Tao Luo, Chengtao Li, Yiping Hou
Massively parallel sequencing (MPS) technologies can sequence many targeted regions of multiple samples simultaneously and are gaining great interest in the forensic community. The Precision ID Identity Panel contains 90 autosomal SNPs and 34 upper Y-Clade SNPs, which was designed with small amplicons and optimized for forensic degraded or challenging samples. Here, 184 unrelated individuals from three East Asian minority ethnicities (Tibetan, Uygur and Hui) were analyzed using the Precision ID Identity Panel and the Ion PGM System...
May 15, 2018: Forensic Science International. Genetics
https://www.readbyqxmd.com/read/29778041/the-efficacy-of-vitamin-d-in-multiple-sclerosis-a-meta-analysis
#8
REVIEW
Chao Zheng, Liang He, Lingling Liu, Jie Zhu, Tao Jin
BACKGROUND: Multiple sclerosis (MS) is a chronic inflammatory demyelination disorder in the central nervous system (CNS) leading to a high level of neurological disability. The pathogenesis of MS remains largely unknown, which explains the lack of significant efficacy of therapy in MS. Vitamin D deficiency is widely considered to be an environmental risk factor for MS. Many studies investigating the therapeutic effects of vitamin D on MS have been applied. The objective of this systematic review and meta-analysis was to evaluate the effectiveness of vitamin D in MS patients...
May 12, 2018: Multiple Sclerosis and related Disorders
https://www.readbyqxmd.com/read/29778039/identifying-the-trauma-recovery-needs-of-maltreated-children-an-examination-of-child-welfare-workers-effectiveness-in-screening-for-traumatic-stress
#9
Adrienne Whitt-Woosley, Ginny Sprang, David G Royse
Children in the child welfare system comprise a group characterized by exposure to trauma via experiences of maltreatment, under circumstances presenting multiple risk factors for traumatic stress. High rates of posttraumatic stress have been observed in this population. However, there is currently no standard for the universal screening of children in child welfare for trauma exposure and traumatic stress. This study examined the trauma experiences of a sample of maltreated children and whether their child welfare workers were effective screeners of traumatic stress symptoms...
May 16, 2018: Child Abuse & Neglect
https://www.readbyqxmd.com/read/29778036/polymeric-nanoparticles-as-a-platform-for-permeability-enhancement-of-class-iii-drug-amikacin
#10
Saman Fatima, Zeenat Iqbal, A K Panda, M Samim, Sushama Talegaonkar, Farhan Jalees Ahmad
Amikacin (A), a water soluble aminoglycoside antibiotic is commercially available for intravenous administration only. Present investigation is aimed at the development of poly-lactic-co-glycolic acid (PLGA) nanoparticles (A-NPs).1 for oral permeability enhancement of amikacin. The pharmaceutical attributes of the A-NPs revealed particle size, 260.3 ± 2.05 nm, zeta potential, -12.9 ± 1.12 mV and drug content, 40.10 ± 1.87 μg/mg with spherical shape and smooth surface. In vitro antibacterial studies showed that the A-NPs were active against P...
May 16, 2018: Colloids and Surfaces. B, Biointerfaces
https://www.readbyqxmd.com/read/29778035/formation-of-contact-active-antimicrobial-surfaces-by-covalent-grafting-of-quaternary-ammonium-compounds
#11
REVIEW
Poverenov Elena, Klein Miri
Different synthetic strategies for the formation of contact active antimicrobial materials utilizing covalent linkage of quaternary ammonium compounds (QACs) were reviewed. There is a demand to find methods that will prevent bacterial fouling without the release of antimicrobial agents, because biocides cause environment pollution and promote the development of bacteria resistance mechanisms. The contact active antimicrobial surfaces may provide a useful tool for this purpose. The covalent surface grafting of QACs seems to be a feasible and promising approach for the formation of safe and effective antimicrobial materials that could be utilized for medical devices, food industry, water treatment systems and other applications...
May 16, 2018: Colloids and Surfaces. B, Biointerfaces
https://www.readbyqxmd.com/read/29778027/influence-of-gastrointestinal-tract-on-metabolism-of-bisphenol-a-as-determined-by-in-vitro-simulated-system
#12
Yonghua Wang, Min Rui, Yang Nie, Guanghua Lu
Oral exposure is a major route of human bisphenol A (BPA) exposure. However, influence of gastrointestinal tract on BPA metabolism is unavailable. In this study, in vitro simulator of the human intestinal microbial ecosystem (SHIME) was applied to investigate the changes in bioaccessibility and metabolism of BPA in different parts of gastrointestinal tract (stomach, small intestine and colon). Then the human hepatoma cell line HepG2 was employed to compare toxic effects of BPA itself and effluents of SHIME system on hepatic gene expression profiles...
May 7, 2018: Journal of Hazardous Materials
https://www.readbyqxmd.com/read/29778024/simultaneous-glucose-production-from-cellulose-and-fouling-reduction-using-a-magnetic-responsive-membrane-reactor-with-superparamagnetic-nanoparticles-carrying-cellulolytic-enzymes
#13
Abaynesh Yihdego Gebreyohannes, Madhav Dharmjeet, Tom Swusten, Matthias Mertens, Joran Verspreet, Thierry Verbiest, Christophe M Courtin, Ivo F J Vankelecom
This work aimed at investigating simultaneous hydrolysis of cellulose and in-situ foulant degradation in a cellulose fed superparamagnetic biocatalytic membrane reactor (BMRSP ). In this reactor, a dynamic layer of superparamagnetic bionanocomposites with immobilized cellulolytic enzymes were reversibly immobilized on superparamagnetic polymeric membrane using an external magnetic field. The formation of a dynamic layer of bionanocomposites on the membrane helped to prevent direct membrane-foulant interaction...
May 2, 2018: Bioresource Technology
https://www.readbyqxmd.com/read/29778022/low-cost-composited-accelerants-for-anaerobic-digestion-of-dairy-manure-focusing-on-methane-yield-digestate-utilization-and-energy-evaluation
#14
Chen Zhang, Sining Yun, Xue Li, Ziqi Wang, Hongfei Xu, Tingting Du
To improve the methane yield and digestate utilization of anaerobic digestion (AD), low-cost composited accelerants consisting of urea (0.2-0.5%), bentonite (0.5-0.8%), active carbon (0.6-0.9%), and plant ash (0.01-0.3%) were designed and tested in batch experiments. Total biogas yield (485.7-681.9 mL/g VS) and methane content (63.0-66.6%) were remarkably enhanced in AD systems by adding accelerants compared to those of control group (361.9 mL/g VS, 59.4%). Composited accelerant addition led to the highest methane yield (454...
May 11, 2018: Bioresource Technology
https://www.readbyqxmd.com/read/29778021/the-homing-of-human-umbilical-cord-derived-mesenchymal-stem-cells-and-the-subsequent-modulation-of-macrophage-polarization-in-type-2-diabetic-mice
#15
Yaqi Yin, Haojie Hao, Yu Cheng, Jieqing Gao, Jiejie Liu, Zongyan Xie, Qi Zhang, Li Zang, Weidong Han, Yiming Mu
Umbilical cord-derived mesenchymal stem cells (UC-MSCs), with both immunomodulatory and pro-regenerative properties, are promising for the treatment of type 2 diabetes mellitus (T2DM). As efficient cell therapy largely relies on appropriate homing to target tissues, knowing where and to what extent injected UC-MSCs have homed is critically important. However, bio-distribution data for UC-MSCs in T2DM subjects are extremely limited. Beneficial effects of UC-MSCs on T2DM subjects are associated with increased M2 macrophages, but no systemic evaluation of M2 macrophages has been performed in T2DM individuals...
May 15, 2018: International Immunopharmacology
https://www.readbyqxmd.com/read/29778017/the-preconception-care-experiences-of-women-with-epilepsy-on-sodium-valproate
#16
Lorna Lawther, Helen Dolk, Marlene Sinclair, Jim Morrow
PURPOSE: To understand the preconception experiences of women with epilepsy who have been taking the teratogenic drug valproate. METHODS: Seven women were recruited, three from a preconception clinic and four from an antenatal clinic in a region of the UK. All had taken valproate preconceptionally. Three preconception clinic encounters were observed and audio-recorded. Interviews with all women were analysed using Interpretative Phenomenological Analysis (IPA). RESULTS: Women experienced a "trajectory of balance"...
May 16, 2018: Seizure: the Journal of the British Epilepsy Association
https://www.readbyqxmd.com/read/29778013/using-google-trends-and-ambient-temperature-to-predict-seasonal-influenza-outbreaks
#17
Yuzhou Zhang, Hilary Bambrick, Kerrie Mengersen, Shilu Tong, Wenbiao Hu
BACKGROUND: The discovery of the dynamics of seasonal and non-seasonal influenza outbreaks remains a great challenge. Previous internet-based surveillance studies built purely on internet or climate data do have potential error. METHODS: We collected influenza notifications, temperature and Google Trends (GT) data between January 1st, 2011 and December 31st, 2016. We performed time-series cross correlation analysis and temporal risk analysis to discover the characteristics of influenza epidemics in the period...
May 16, 2018: Environment International
https://www.readbyqxmd.com/read/29778010/exposure-to-cannabinoid-agonist-win-55-212-2-during-early-adolescence-increases-alcohol-preference-and-anxiety-in-cd1-mice
#18
Jimena Laura Frontera, Victoria María Gonzalez Pini, Fernando Luis Messore, Alicia Brusco
The endocannabinoid (eCB) system is involved in the modulation of the reward system and participates in the reinforcing effects of different drugs of abuse, including alcohol. The most abundant receptor of the eCB system in the central nervous system is the CB1 receptor (CB1R), which is predominantly expressed in areas involved in drug addiction, such as the nucleus accumbens, the ventral tegmental area, the substantia nigra and the raphe nucleus. CB1R is expressed in early stages during development, and reaches maximum levels during early adolescence...
May 16, 2018: Neuropharmacology
https://www.readbyqxmd.com/read/29778007/augmentation-of-the-expression-of-the-eotaxin-receptor-on-duodenal-neutrophils-by-il-21
#19
Yuji Takeda, Tomoyuki Kato, Nobuhito Nemoto, Akemi Araki, Mohammad Yeashin Gazi, Hidetoshi Nara, Hironobu Asao
Inflammation can occur via different mechanisms, such as via acute and chronic responses, on numerous occasions and function accordingly through various roles. There are more than five subsets of neutrophils; neutrophilic heterogeneity is modulated by the inflammatory condition. To understand the characteristics of inflammation, identification of atypical neutrophils is important. In this study, we found that the expression of eotaxin receptor (CD193) on atypical neutrophils in the duodenum is augmented in IL-21 isoform transgenic (Tg) mice...
May 16, 2018: Cytokine
https://www.readbyqxmd.com/read/29777996/odor-impact-assessment-of-trace-sulfur-compounds-from-working-faces-of-landfills-in-beijing-china
#20
Yanjun Liu, Wenjing Lu, Hongtao Wang, Qifei Huang, Xingbao Gao
Odor pollution from landfills is causing a growing number of public complaints and concerns. Compared with hydrogen sulfide (H2 S) and ammonia (NH3 ), odor impacts of trace sulfur compounds (TSCs) are arousing concerns due to their low odor threshold values (OTVs). Working face on landfill sites has been claimed as major source of odor impacts. This study estimated the odor impacts of fugitive TSCs from the working face of a large typical municipal solid waste (MSW) landfill in Beijing, China. A modified wind tunnel system was introduced to estimate emission rates of TSCs, which is a basic requirement for odor impact assessment...
May 15, 2018: Journal of Environmental Management
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