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https://www.readbyqxmd.com/read/28220537/immobilization-of-horseradish-peroxidase-on-zno-nanowires-macroporous-sio2-composites-for-the-complete-decolorization-of-anthraquinone-dyes
#1
Huaiyan Sun, Xinyu Jin, Feng Jiang, Ruifeng Zhang
A Zinc Oxide (ZnO) nanowires/ macroporous Silicon dioxide (SiO2 ) composite was used as support to immobilize horseradish peroxidase (HRP) simply by in-situ cross-linking method. As cross-linker was adsorbed on the surface of ZnO nanowires, the cross-linked HRP was quite different from the traditional cross-linking enzyme aggregates (CLEAs) on both structure and catalytic performance. Among three epoxy compounds diethylene glycol diglycidyl ether (DDE) was the best cross-linker, with which the loading amount of HRP with pI of 5...
February 21, 2017: Biotechnology and Applied Biochemistry
https://www.readbyqxmd.com/read/28220383/removal-of-dde-by-exploiting-the-alcoho-phobic-interactions
#2
Kazım Köse, Dursun Ali Köse
DDE (1,1-bis-(4-chlorophenyl)-2,2-dichloroethene), which is a commonly used pesticides in agriculture, has harmful effects on human health. Therefore, the removal of this substance from the drinking water and the soil is essential. Since DDT (1,1″-(2,2,2-Trichloroethane-1,1-diyl) bis(4-chlorobenzene)) is derivation of DDE, the presence of DDT can be monitored by the detection of DDE present in the environment. Herein, we report on the development of aspartic acid-incorporated poly(2-hydroxyethyl methacrylate-L-aspartic acid) [poly(HEMA-MAsp)] cryogel for the removal of DDE from aqueous solutions for the first time in the literature...
February 20, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/28202225/persistent-organic-pollutants-and-diabetes-among-inuit-in-the-canadian-arctic
#3
Kavita Singh, Hing Man Chan
Type 2 diabetes is a chronic metabolic disease that is of increasing concern in Inuit communities. Behavioural factors such as physical inactivity and poor diet are well-known risk factors. Exposure to persistent organic pollutants (POPs) has emerged as an additional factor in the pathogenesis of diabetes. In this study, association between polychlorinated biphenyls (PCBs) and p,p'-dichlorodiphenyldichloroethylene (p,p'-DDE) with diabetes in Canadian Inuit was examined. Data from the Adult Inuit Health Survey (2007-2008) of Inuit participants from the Canadian Arctic were analyzed...
February 12, 2017: Environment International
https://www.readbyqxmd.com/read/28202064/prediagnostic-plasma-concentrations-of-organochlorines-and-risk-of-b-cell-non-hodgkin-lymphoma-in-envirogenomarkers-a-nested-case-control-study
#4
Rachel S Kelly, Hannu Kiviranta, Ingvar A Bergdahl, Domenico Palli, Ann-Sofie Johansson, Maria Botsivali, Paolo Vineis, Roel Vermeulen, Soterios A Kyrtopoulos, Marc Chadeau-Hyam
BACKGROUND: Evidence suggests a largely environmental component to non-Hodgkin's lymphoma (NHL). Persistent organic pollutants (POPs) including polychlorinated biphenyls (PCBs), DDE and HCB have been repeatedly implicated, but the literature is inconsistent and a causal relationship remains to be determined. METHODS: The EnviroGenoMarkers study is nested within two prospective cohorts EPIC-Italy and the Northern Sweden Health and Disease Study. Six PCB congeners, DDE and HCB were measured in blood plasma samples provided at recruitment using gas-chromatography mass spectrometry...
February 16, 2017: Environmental Health: a Global Access Science Source
https://www.readbyqxmd.com/read/28196346/organochlorine-pesticides-ocps-and-polychlorinated-biphenyls-pcbs-in-human-breast-milk-and-associated-health-risks-to-nursing-infants-in-northern-tanzania
#5
M H B Müller, A Polder, O B Brynildsrud, M Karimi, E Lie, W B Manyilizu, R H Mdegela, F Mokiti, M Murtadha, H E Nonga, J U Skaare, J L Lyche
This is the first study to report organochlorines (OCs), including chlorinated pesticides (OCPs) and polychlorinated biphenyls (PCBs) in human milk from Tanzania. The main aims of this study were to assess the level of contamination and the possible health risks related to OC exposure in nursing infants from the Northern parts of Tanzania. Ninety-five healthy mother-infant couples attending Mount Meru Regional Referral Hospital (MMRRH), Arusha, Tanzania, were assessed for associations between maternal/infant characteristics, i...
February 11, 2017: Environmental Research
https://www.readbyqxmd.com/read/28192994/cats-internal-exposure-to-selected-brominated-flame-retardants-and-organochlorines-correlated-to-house-dust-and-cat-food
#6
J Norrgran Engdahl, A Bignert, B Jones, I Athanassiadis, Å Bergman, J M Weiss
Pet cats may be used as a biomarker for assessing exposures to organohalogen compounds (OHCs) adsorbed to household dust in home environments. This study explores two exposure routes of OHCs, ingestion of OHCs (i) via house dust and (ii) via cat food. House dust from 17 Swedish homes and serum from the participating families' pet cats were collected, and cat food was purchased matching the diet reported. Paired samples of cat serum, house dust, and cat food were analyzed for brominated flame retardants/natural products (polybrominated diphenyl ethers (PBDEs), decabromobiphenyl (BB-209), decabromodiphenyl ethane (DBDPE), 2,4,6-tribromophenol (2,4,6-TBP), OH-PBDEs) and organochlorines (polychlorinated biphenyls (PCBs), 1,1-bis(4,4'-dichlorodiphenyl)-2,2,2-trichloroethane (4,4'-DDT), 1,1-bis(4,4'-dichlorodiphenyl)-2,2-dichloroethene (4,4'-DDE), hexachlorobenzene (HCB), pentachlorophenol (PCP))...
February 21, 2017: Environmental Science & Technology
https://www.readbyqxmd.com/read/28179488/social-franchising-and-a-nationwide-mass-media-campaign-increased-the-prevalence-of-adequate-complementary-feeding-in-vietnam-a-cluster-randomized-program-evaluation
#7
Rahul Rawat, Phuong Hong Nguyen, Lan Mai Tran, Nemat Hajeebhoy, Huan Van Nguyen, Jean Baker, Edward A Frongillo, Marie T Ruel, Purnima Menon
Background: Rigorous evaluations of health system-based interventions in large-scale programs to improve complementary feeding (CF) practices are limited. Alive & Thrive applied principles of social franchising within the government health system in Vietnam to improve the quality of interpersonal counseling (IPC) for infant and young child feeding combined with a national mass media (MM) campaign and community mobilization (CM). Objective: We evaluated the impact of enhanced IPC + MM + CM (intensive) compared with standard IPC + less-intensive MM and CM (nonintensive) on CF practices and anthropometric indicators...
February 8, 2017: Journal of Nutrition
https://www.readbyqxmd.com/read/28177285/target-dna-bending-by-the-mu-transpososome-promotes-careful-transposition-and-prevents-its-reversal
#8
James Richard Fuller, Phoebe A Rice
The transposition of bacteriophage Mu serves as a model system for understanding DDE transposases and integrases. All available structures of these enzymes at the end of the transposition reaction, including Mu, exhibit significant bends in the transposition target site DNA. Here we use Mu to investigate the ramifications of target DNA bending on the transposition reaction. Enhancing the flexibility of the target DNA or prebending it increases its affinity for transpososomes by over an order of magnitude and increases the overall reaction rate...
February 8, 2017: ELife
https://www.readbyqxmd.com/read/28160993/three-cycles-of-human-biomonitoring-in-flanders-time-trends-observed-in-the-flemish-environment-and-health-study
#9
Greet Schoeters, Eva Govarts, Liesbeth Bruckers, Elly Den Hond, Vera Nelen, Stefaan De Henauw, Isabelle Sioen, Tim S Nawrot, Michelle Plusquin, Annette Vriens, Adrian Covaci, Ilse Loots, Bert Morrens, Dries Coertjens, Nicolas Van Larebeke, Sam De Craemer, Kim Croes, Nathalie Lambrechts, Ann Colles, Willy Baeyens
To follow time trends in exposure to environmental chemicals, three successive campaigns of the Flemish Environment and Health Study (FLEHS) have recruited and sampled in total 5825 participants between 2002 and 2014. Cord samples from newborns, urine and blood samples from 14 to 15 years old adolescents and from adults between 50 and 65 years old were analysed in geographical representative samples of the Flemish population. The data of the different campaigns were considered per age group and per biomarker after adjustment for predefined covariates to take into account differences in characteristics of the study populations over time...
November 18, 2016: International Journal of Hygiene and Environmental Health
https://www.readbyqxmd.com/read/28153416/evaluating-the-effectiveness-of-pollution-control-measures-via-the-occurrence-of-ddts-and-hchs-in-wet-deposition-of-an-urban-center-china
#10
Ling-Chuan Guo, Lian-Jun Bao, Shao-Meng Li, Shu Tao, Eddy Y Zeng
Wet deposition is not only a mechanism for removing atmospheric pollutants, but also a process which reflects loadings of atmospheric pollutants. Our previous study on wet deposition examined the effectiveness of short-term control measures on atmospheric particulate pollution, which were partly effective for organic pollutants of current input sources. In the present study, dichlorodiphenyltrichloroethanes (DDTs) and hexachlorocyclohexanes (HCHs), representative of legacy contaminants, were measured in the same samples collected throughout the entire year of 2010 in Guangzhou, a large urban center in South China...
January 30, 2017: Environmental Pollution
https://www.readbyqxmd.com/read/28138100/transposase-mediated-excision-conjugative-transfer-and-diversity-of-ice6013-in-staphylococcus-aureus
#11
Emily A Sansevere, Xiao Luo, Joo Youn Park, Sunghyun Yoon, Keun Seok Seo, D Ashley Robinson
: ICE6013 represents one of two families of integrative conjugative elements (ICEs) identified in the pan-genome of the human and animal pathogen, Staphylococcus aureus Here we investigate the excision and conjugation functions of ICE6013 and further characterize the diversity of this element. ICE6013 excision is not significantly affected by growth, temperature, pH or UV exposure and does not depend on recA The IS30-like DDE transposase (Tpase; orf1 and orf2) of ICE6013 must be uninterrupted for excision to occur, whereas disruption of three other orfs on the element significantly affect the level of excision...
January 30, 2017: Journal of Bacteriology
https://www.readbyqxmd.com/read/28126487/single-pulse-per-second-setting-reduces-fluoroscopy-time-during-ureteroscopy
#12
Todd S Yecies, Anisleidy Fombona, Michelle J Semins
OBJECTIVE: To evaluate the effect of 1 pulse-per-second (pps) fluoroscopy on fluoroscopy time and surgeon radiation exposure during ureteroscopy. METHODS: A retrospective review of a single endourologist's operative records was performed over a 12 month period. Adult patients undergoing ureteroscopy were included. At the 6 month point, the switch from continuous "low-dose" to 1 pps "low-dose" fluoroscopy was made. Surgeon radiation exposure was measured using 1 dosimeter placed at the torso under the lead apron and 1 dosimeter overlying the chest outside the lead apron...
January 23, 2017: Urology
https://www.readbyqxmd.com/read/28121271/pesticide-contaminants-in-selected-species-of-edible-wild-mushrooms-from-the-north-eastern-part-of-poland
#13
Michalina Gałgowska, Renata Pietrzak-Fiećko
The aim of this study was to determine the level of chlorinated hydrocarbon residues in selected edible mushrooms from north-eastern Poland. The experiment was carried out on 45 samples consisting of 15 fruiting bodies each of the following species: Boletus edulis, Imleria badia and Cantharellus cibarius. Dried samples were subjected to extraction of lipids with a Soxhlet and a standard procedure-based on the decomposition of lipids by concentrated sulfuric acid and the release of organic insecticides to the hexane layer-was used to determine chlorinated hydrocarbons...
March 4, 2017: Journal of Environmental Science and Health. Part. B, Pesticides, Food Contaminants, and Agricultural Wastes
https://www.readbyqxmd.com/read/28113064/organochlorine-pesticides-in-residential-soils-and-sediments-within-two-main-agricultural-areas-of-northwest-mexico-concentrations-enantiomer-compositions-and-potential-sources
#14
José Luis Sánchez-Osorio, José Vinicio Macías-Zamora, Nancy Ramírez-Álvarez, Terry F Bidleman
The agricultural Mexicali and Yaqui valleys (MV, YV) in northwest Mexico were heavily treated with organochlorine pesticides in the past. Residential soils and agricultural drain sediments were sampled in 2008-2009 and analyzed for DDTs (o,p'- and p,p'- isomers of DDE, DDD and DDT); hexachlorocyclohexanes (α-, β-, γ- and δ-HCH) and chlordanes (trans-chlordane, cis-chlordane, heptachlor and heptachlor exo-epoxide). Geometric means (GMs) (ng g(-1) dry weight) were: MV soils (n = 27) ΣDDT 22, ΣHCH 0.80, ΣCHL 0...
January 5, 2017: Chemosphere
https://www.readbyqxmd.com/read/28111002/more-surprises-in-the-global-greenhouse-human-health-impacts-from-recent-toxic-marine-aerosol-formations-due-to-centennial-alterations-of-world-wide-coastal-food-webs
#15
REVIEW
J J Walsh, J M Lenes, R H Weisberg, L Zheng, C Hu, K A Fanning, R Snyder, J Smith
Reductions of zooplankton biomasses and grazing pressures were observed during overfishing-induced trophic cascades and concurrent oil spills at global scales. Recent phytoplankton increments followed, once Fe-, P-, and N-nutrient limitations of commensal diazotrophs and dinoflagellates were also eliminated by respective human desertification, deforestation, and eutrophication during climate changes. Si-limitation of diatoms instead ensued during these last anthropogenic perturbations of agricultural effluents and sewage loadings...
January 19, 2017: Marine Pollution Bulletin
https://www.readbyqxmd.com/read/28110018/historical-records-and-sources-of-polycyclic-aromatic-hydrocarbons-pahs-and-organochlorine-pesticides-ocps-in-sediment-from-a-representative-plateau-lake-china
#16
Hezhong Yuan, Enfeng Liu, Enlou Zhang, Wenlei Luo, Liang Chen, Cheng Wang, Qi Lin
The PAH and OCP concentrations in sediment cores collected from a deep lake were measured and evaluated chronologically. The results indicated that the PAH and OCP concentrations significantly increased from the 1950s to the 1990s and subsequently decreased to recent years. Integrated molecular diagnostic ratios indicated that the predominant petrogenic sources occurred from the 1950s-1980s. Petroleum and fuel combustion dominated the source of contamination more recently as a result of energy structure changes in this region...
January 9, 2017: Chemosphere
https://www.readbyqxmd.com/read/28096902/functional-characterization-of-the-active-mutator-like-transposable-element-muta1-from-the-mosquito-aedes-aegypti
#17
Kun Liu, Susan R Wessler
BACKGROUND: Mutator-like transposable elements (MULEs) are widespread with members in fungi, plants, and animals. Most of the research on the MULE superfamily has focused on plant MULEs where they were discovered and where some are extremely active and have significant impact on genome structure. The maize MuDR element has been widely used as a tool for both forward and reverse genetic studies because of its high transposition rate and preference for targeting genic regions. However, despite being widespread, only a few active MULEs have been identified, and only one, the rice Os3378, has demonstrated activity in a non-host organism...
2017: Mobile DNA
https://www.readbyqxmd.com/read/28089717/persistent-organic-pollutants-pops-in-human-follicular-fluid-and-in-vitro-fertilization-outcomes-a-pilot-study
#18
Michael S Bloom, Victor Y Fujimoto, Robin Storm, Li Zhang, Celeste D Butts, Diana Sollohub, Robert L Jansing
Persistent organic pollutants (POPs) are ubiquitously distributed among the U.S. population and adversely impact human reproduction. These compounds have been detected in human ovarian follicular fluid (FF), where they directly contact a developing oocyte. As a pilot investigation, we measured 43 polychlorinated biphenyl (PCB) congeners, p,p'-dichlorodiphenyltrichloroethane (DDT), and its persistent metabolite p,p'-dichlorodiphenyldichloroethylene (DDE) in residual FF collected from 32 women undergoing in vitro fertilization (IVF)...
January 2017: Reproductive Toxicology
https://www.readbyqxmd.com/read/28071968/rapid-and-robust-authentication-of-deer-antler-velvet-product-by-fast-pcr-rflp-analysis
#19
Chao Jiang, Yan Jin, Xinlei Zhao, Yuan Yuan, Yuyang Zhao, Luqi Huang
Deer antler velvet is widely used as a vitalizing, tonifying, haemopoietic and strengthening agent for debilitated persons in East Asia. To develop a rapid and sensitive method for the identification of the biological source or origin in antler velvet products, a molecular approach was applied using PCR-restriction fragment length polymorphism analysis. The cytochrome b gene sequences of nine cervidae species were analyzed, and a Dde I restriction endonuclease recognition site was found only in sika deer and red deer, the official origin of deer velvet in Chinese pharmacopoeia...
January 10, 2017: Mitochondrial DNA. Part A. DNA Mapping, Sequencing, and Analysis
https://www.readbyqxmd.com/read/28065657/mapping-the-binding-site-of-bms-708163-on-%C3%AE-secretase-with-cleavable-photoprobes
#20
Natalya Gertsik, Christopher W Am Ende, Kieran F Geoghegan, Chuong Nguyen, Paramita Mukherjee, Scot Mente, Uthpala Seneviratne, Douglas S Johnson, Yue-Ming Li
γ-Secretase, a four-subunit transmembrane aspartic proteinase, is a highly valued drug target in Alzheimer's disease and cancer. Despite significant progress in structural studies, the respective molecular mechanisms and binding modes of γ-secretase inhibitors (GSIs) and modulators (GSMs) remain uncertain. Here, we developed biotinylated cleavable-linker photoprobes based on the BMS-708163 GSI to study its interaction with γ-secretase. Comparison of four cleavable linkers indicated that the hydrazine-labile N-1-(4,4-dimethyl-2,6-dioxocyclohexylidene)ethyl (Dde) linker was cleaved most efficiently to release photolabeled and affinity-captured presenilin-1 (PS1), the catalytic subunit of γ-secretase...
January 19, 2017: Cell Chemical Biology
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