keyword
MENU ▼
Read by QxMD icon Read
search

OCP

keyword
https://www.readbyqxmd.com/read/28432879/seasonal-variation-and-health-risk-assessment-of-organochlorine-compounds-in-urban-soils-of-novi-sad-serbia
#1
Biljana D Škrbić, Vesna Marinković, Igor Antić, Anita Petrović Gegić
The aim of this paper was to determine spatial and seasonal variation of 6 indicator polychlorinated biphenyls (PCBs) and 18 organochlorine pesticides (OCPs) in urban soils of Novi Sad, Serbia. Sixty surface soil samples were collected during both winter and summer season, from different types of locations: schools, recreational areas, residential and industrial zones. Samples were treated using the method of accelerated solvent extraction, which allows simultaneous extraction and clean up of PCBs and OCPs...
April 15, 2017: Chemosphere
https://www.readbyqxmd.com/read/28432626/temporal-trends-of-lipophilic-persistent-organic-pollutants-in-serum-from-danish-nulliparous-pregnant-women-2011-2013
#2
Christian Bjerregaard-Olesen, Manhai Long, Mandana Ghisari, Bodil H Bech, Ellen A Nohr, Niels Uldbjerg, Tine B Henriksen, Jørn Olsen, Eva C Bonefeld-Jørgensen
The use of the lipophilic persistent organic pollutants (POPs) including polychlorinated biphenyls (PCBs) and several organochlorine pesticides (OCPs) has been prohibited for more than 30 years. In this study, we present the temporal trends of the lipophilic POP serum concentrations in Danish nulliparous pregnant women between 2011 and 2013. We randomly selected 197 pregnant women (gestational age 11-13) from the Aarhus Birth Cohort. The concentrations of the lipophilic POPs in the serum samples were analyzed using gas chromatography...
April 21, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/28432082/effect-of-oral-contraceptives-and-or-metformin-on-glp-1-secretion-and-reactive-hypoglycemia-in-pcos
#3
Dorte Glintborg, Hanne Mumm, Jens Juul Holst, Marianne Andersen
CONTEXT: Insulin resistance in polycystic ovary syndrome (PCOS) may increase the risk of reactive hypoglycaemia (RH) and decrease glucagon-like peptide-1 (GLP-1) secretion. The possible effects of treatment with oral contraceptives (OCP) and/or metformin on GLP-1 secretion and risk of RH in PCOS is undetermined. SETTING: Outpatient clinic. PATIENTS AND INTERVENTIONS: Randomized, controlled clinical trial. Ninety women with PCOS were randomized to 12 month treatment with OCP (150 mg desogestrel+30 microgram ethinylestradiol), metformin (2 g/day), or metformin +OCP...
April 21, 2017: Endocrine Connections
https://www.readbyqxmd.com/read/28430281/insertion-of-sodium-phosphaethynolate-na-ocp-into-a-zirconium-benzyne-complex
#4
Jerod M Kieser, Robert J Gilliard, Arnold L Rheingold, Hansjörg Grützmacher, John D Protasiewicz
Reaction of the zirconium-benzyne complex [Cp2Zr(PMe3)(C6H4)] with sodium phosphaethynolate, Na[OCP], affords a zircono-phosphaalkene complex. Notably, unlike reactions of other transition metal complexes with Na[OCP] that yield the products of simple salt metathesis, this transformation represents novel Na[OCP] insertion chemistry and formation of an unusual solid state coordination polymer. The polymer is disrupted upon addition of Me3SiCl to afford a silyl-capped dimer that retains the zirconophosphaalkene functionality...
April 21, 2017: Chemical Communications: Chem Comm
https://www.readbyqxmd.com/read/28427990/neuropeptide-y-not-involved-in-cutaneous-vascular-control-in-young-human-females-taking-oral-contraceptive-hormones
#5
Gary J Hodges, Zachary T Martin, Andrew T Del Pozzi
We previously reported that the cutaneous vasodilator response to local warming in males required noradrenaline (NA) and neuropeptide-Y (NPY). Animal work has shown no role for NPY in female vascular control. We investigated the contribution of NA and NPY in human female cutaneous vascular control. Nine female and nine male participants volunteered. To elucidate whether synthetic oestrogen and progesterone altered cutaneous vascular responses, females were tested in high-hormone (HH) and low-hormone (LH) phases of oral contraceptive pill (OCP)...
April 18, 2017: Microvascular Research
https://www.readbyqxmd.com/read/28424909/comparison-of-clinical-outcomes-and-quality-of-life-between-laparoscopic-and-open-central-pancreatectomy-with-pancreaticojejunostomy
#6
Ren-Chao Zhang, Bin Zhang, Yi-Ping Mou, Xiao-Wu Xu, Yu-Cheng Zhou, Chao-Jie Huang, Jia-Yu Zhou, Wei-Wei Jin, Chao Lu
BACKGROUND: The studies comparing laparoscopic and open central pancreatectomy with pancreaticojejunostomy are limited. This study aimed to compare clinical outcomes and quality of life of patients undergoing laparoscopic and open central pancreatectomy with pancreaticojejunostomy. METHODS: Between December 1997 and December 2015, patients who underwent central pancreatectomy with pancreaticojejunostomy were reviewed. Patients were divided into 2 groups as laparoscopic central pancreatectomy (LCP) and open central pancreatectomy (OCP)...
April 19, 2017: Surgical Endoscopy
https://www.readbyqxmd.com/read/28421253/levels-and-sources-of-organochlorine-pesticides-in-surface-sediment-from-anhui-reach-of-huaihe-river-china
#7
Chunnian Da, Ke Wu, Jie Jin, Minjun Yu
Twenty-two organochlorine pesticides (OCPs) were investigated in Anhui reach of Huaihe river, China. Seventeen out of 22 OCPs were detected by GC-MS. The mean concentrations of OCPs followed the order: HCHs > DDTs > HCB > chlordanes > endosulfans. Levels of total HCHs and total DDTs ranged from 2.54 to 13.91 ng g(-1) (mean = 7.52 ng g(-1)) and 0.016 to 2.54 ng g(-1) (mean = 0.45 ng g(-1)), respectively. The concentrations of DDTs were lower than those of HCHs. Compared with the other rivers in China, DDTs and HCHs were relatively lower or similar...
April 18, 2017: Bulletin of Environmental Contamination and Toxicology
https://www.readbyqxmd.com/read/28421252/altitude-distributions-and-source-analysis-of-ocps-and-pcbs-in-surface-soils-of-changbai-mountain-northeast-china
#8
Xiaochun Wang, Shu Chen, Kuiyuan Wan, Xiaocai Yin, Xiaohua Zhu, Jing Pan, Yongliang Yang
Organochlorine pesticides and polychlorinated biphenyls in surface soils of Changbai Mountain, Northeastern China, have been quantified by gas chromatography with electron capture detector and the altitude distributions and possible pollution sources were analyzed. The concentrations of ∑HCHs, ∑DDTs and ∑7PCBs were in the range of 3.09-25.6, 0.96-19.4 and 7.32-26.1 ng/g dw, respectively. The concentration of α-HCH, β-HCH, p,p'-DDT, p,p'-DDE, PCB 101, 138, 153, and 180 showed increasing trends with altitude...
April 18, 2017: Bulletin of Environmental Contamination and Toxicology
https://www.readbyqxmd.com/read/28420543/serum-persistent-organic-pollutants-pops-and-prostate-cancer-risk-a-case-cohort-study
#9
Jung-Eun Lim, Chungmo Nam, Jiyeon Yang, Koon Ho Rha, Kyung-Min Lim, Sun Ha Jee
It is still unclear whether persistent organic pollutants (POPs) exposure increases the prostate cancer incidence risk. This prospective cohort study evaluated the associations between serum POPs concentrations and prostate cancer risk. Within a case-cohort study, we identified 110 people diagnosed with prostate cancer and randomly selected 256 sub-cohort participants without prostate cancer. Serum concentrations of 32 polychlorinated biphenyl (PCB) congeners and 19 organochlorine pesticides (OCPs) were measured...
April 10, 2017: International Journal of Hygiene and Environmental Health
https://www.readbyqxmd.com/read/28415283/quantifying-disorder-in-colloidal-films-spin-coated-onto-patterned-substrates
#10
Raheema Aslam, Sergio Ardanza-Trevijano, Kristin M Poduska, Anand Yethiraj, Wenceslao González-Viñas
Polycrystals of thin colloidal deposits, with thickness controlled by spin-coating speed, exhibit axial symmetry with local 4-fold and 6-fold symmetric structures, termed orientationally correlated polycrystals (OCPs). While spin-coating is a very facile technique for producing large-area colloidal deposits, the axial symmetry prevents us from achieving true long-range order. To obtain true long-range order, we break this axial symmetry by introducing a patterned surface topography and thus eliminate the OCP character...
March 2017: Physical Review. E
https://www.readbyqxmd.com/read/28413228/air-breathing-cathodes-for-microbial-fuel-cell-using-mn-fe-co-and-ni-containing-platinum-group-metal-free-catalysts
#11
Mounika Kodali, Carlo Santoro, Alexey Serov, Sadia Kabir, Kateryna Artyushkova, Ivana Matanovic, Plamen Atanassov
The oxygen reduction reaction (ORR) is one of the major factors that is limiting the overall performance output of microbial fuel cells (MFC). In this study, Platinum Group Metal-free (PGM-free) ORR catalysts based on Fe, Co, Ni, Mn and the same precursor (Aminoantipyrine, AAPyr) were synthesized using identical sacrificial support method (SSM). The catalysts were investigated for their electrochemical performance, and then integrated into an air-breathing cathode to be tested in "clean" environment and in a working microbial fuel cell (MFC)...
March 20, 2017: Electrochimica Acta
https://www.readbyqxmd.com/read/28398414/oral-contraceptives-for-acne-treatment-us-dermatologists-knowledge-comfort-and-prescribing-practices
#12
Laura Fitzpatrick, Elizabeth Mauer, Cynthia L Chen
The use of oral contraceptive pills (OCPs), which can be an effective treatment of acne in women, is poorly understood among many dermatologists. In this study, we surveyed 116 US dermatologists about their knowledge, comfort, and prescribing practices pertaining to the use of OCPs. The majority of respondents had previously prescribed OCPs and believed they were an effective treatment of acne in women. Despite adverse effects such as increased risk for venous thromboembolism (VTE) associated with OCPs, especially those containing drospirenone, our study indicated that many dermatologists believe the benefits of increased treatment efficacy may outweigh the risks...
March 2017: Cutis; Cutaneous Medicine for the Practitioner
https://www.readbyqxmd.com/read/28397872/organochloride-pesticides-impaired-mitochondrial-function-in-hepatocytes-and-aggravated-disorders-of-fatty-acid-metabolism
#13
Qian Liu, Qihan Wang, Cheng Xu, Wentao Shao, Chunlan Zhang, Hui Liu, Zhaoyan Jiang, Aihua Gu
p,p'-dichlorodiphenyldichloroethylene (p, p'-DDE) and β-hexachlorocyclohexane (β-HCH) were two predominant organochlorine pesticides (OCPs) metabolites in human body associated with disorders of fatty acid metabolism. However, the underlying mechanisms have not been fully clarified. In this study, adult male C57BL/6 mice were exposed to low dose of p, p'-DDE and β-HCH for 8 wk. OCPs accumulation in organs, hepatic fatty acid composition, tricarboxylic acid cycle (TCA) metabolites and other metabolite profiles were analyzed...
April 11, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28395204/spatial-correlation-analysis-of-polycyclic-aromatic-hydrocarbons-pahs-and-organochlorine-pesticides-ocps-in-sediments-between-taihu-lake-and-its-tributary-rivers
#14
Zhonghua Zhao, Yu Jiang, Qianyu Li, Yongjiu Cai, Hongbin Yin, Lu Zhang, Jin Zhang
The residues of polycyclic aromatic hydrocarbons (PAHs) and organochlorine pesticides (OCPs) in surface sediments from Taihu Lake basin (THB) and Taihu Lake body (THL) were investigated. Higher concentrations of both PAHs and OCPs were observed for THB than THL. The concentrations of PAHs ranged from 12.1 to 2281.1ngg(-1) dw for THB and from 11.4 to 209.9ngg(-1) dw for THL, while OCPs ranged from 16.3 to 96.9ngg(-1) dw and from 16.8 to 61.9ngg(-1) dw for THB and THL, respectively. Spatial distribution of PAHs and OCPs showed a high correspondence with the land use of THB and surrounding anthropogenic activity...
April 7, 2017: Ecotoxicology and Environmental Safety
https://www.readbyqxmd.com/read/28392238/organochloride-pesticides-modulated-gut-microbiota-and-influenced-bile-acid-metabolism-in-mice
#15
Qian Liu, Wentao Shao, Chunlan Zhang, Cheng Xu, Qihan Wang, Hui Liu, Haidong Sun, Zhaoyan Jiang, Aihua Gu
Organochlorine pesticides (OCPs) can persistently accumulate in body and threaten human health. Bile acids and intestinal microbial metabolism have emerged as important signaling molecules in the host. However, knowledge on which intestinal microbiota and bile acids are modified by OCPs remains unclear. In this study, adult male C57BL/6 mice were exposed to p, p'-dichlorodiphenyldichloroethylene (p, p'-DDE) and β-hexachlorocyclohexane (β-HCH) for 8 weeks. The relative abundance and composition of various bacterial species were analyzed by 16S rRNA gene sequencing...
April 6, 2017: Environmental Pollution
https://www.readbyqxmd.com/read/28391868/deep-eutectic-solvent-magnetic-bucky-gels-in-developing-dispersive-solid-phase-extraction-application-for-ultra-trace-analysis-of-organochlorine-pesticides-by-gc-micro-ecd-using-a-large-volume-injection-technique
#16
Seyedeh Mahboobeh Yousefi, Farzaneh Shemirani, Sohrab Ali Ghorbanian
Novel deep eutectic solvent (DES) magnetic bucky gels (MBG) were formed by choline chloride/urea deep eutectic solvent and magnetic multi-walled carbon nanotube nanocomposite (MMWCNT) and were used in developing dispersive solid-phase extraction (dSPE) method. The hydrophilic DES based MBGs were developed with the features of magnetic susceptibility to permit fast injection of sorbent into the aqueous sample, rapid retrieval of the sorbent, high dispersion of MWCNT in water and compatibility with GC. In this work we investigated the application of DESs as a new class of carriers for CNT based nanofluids...
June 1, 2017: Talanta
https://www.readbyqxmd.com/read/28391046/structure-and-functions-of-orange-carotenoid-protein-homologs-in-cyanobacteria
#17
REVIEW
Han Bao, Matthew R Melnicki, Cheryl A Kerfeld
Rapidly-induced photoprotection in cyanobacteria involves thermal dissipation of excess energy absorbed by the phycobilisome (PBS), the primary light-harvesting antenna. This process is called non-photochemical quenching (NPQ), and is mediated by a water-soluble photoactive protein, the Orange Carotenoid Protein (OCP). The OCP is structurally and functionally modular, consisting of a sensor domain, an effector domain, and a carotenoid. Blue-green light induces a structural transition of the OCP from the orange inactive form, OCP(o), to the red active form, OCP(R)...
April 5, 2017: Current Opinion in Plant Biology
https://www.readbyqxmd.com/read/28386792/biophysical-modeling-of-in-vitro-and-in-vivo-processes-underlying-regulated-photoprotective-mechanism-in-cyanobacteria
#18
Evgeny A Shirshin, Elena E Nikonova, Fedor I Kuzminov, Nikolai N Sluchanko, Irina V Elanskaya, Maxim Y Gorbunov, Victor V Fadeev, Thomas Friedrich, Eugene G Maksimov
Non-photochemical quenching (NPQ) is a mechanism responsible for high light tolerance in photosynthetic organisms. In cyanobacteria, NPQ is realized by the interplay between light-harvesting complexes, phycobilisomes (PBs), a light sensor and effector of NPQ, the photoactive orange carotenoid protein (OCP), and the fluorescence recovery protein (FRP). Here, we introduced a biophysical model, which takes into account the whole spectrum of interactions between PBs, OCP, and FRP and describes the experimental PBs fluorescence kinetics, unraveling interaction rate constants between the components involved and their relative concentrations in the cell...
April 6, 2017: Photosynthesis Research
https://www.readbyqxmd.com/read/28382548/study-of-persistent-toxic-pollutants-in-a-river-basin-ecotoxicological-risk-assessment
#19
Evangelia Terzopoulou, Dimitra Voutsa
This study presents a complementary approach for the evaluation of water quality in a river basin by employing active and passive sampling. Persistent toxic pollutants representing three classes: organochlorinated pesticides (OCPs), polychlorinated biphenyls (PCBs) and polycyclic aromatic hydrocarbons (PAHs), were studied in grab water samples, in passive samplers/SemiPermeable Membrane Devices (SPMDs) and in fish tissues collected along the Strymonas River, northern Greece at three sampling campaigns during the year 2013...
April 5, 2017: Ecotoxicology
https://www.readbyqxmd.com/read/28382443/presence-of-persistent-organic-pollutants-in-a-breeding-common-tern-sterna-hirundo-population-in-ireland
#20
Heidi Acampora, Philip White, Olga Lyashevska, Ian O'Connor
Persistent organic pollutants (POPs) are chemical compounds of environmental concern due to their toxic, persistent nature and their ability to bio-accumulate in biological tissue. Seabirds, for often being at the top of the food web, have been used as monitors of environmental pollutants. Adverse effects caused by POPs have been reported in common terns (Sterna hirundo) since the 1970s. Egg shell thinning, embryo and hatchling deformities have been reported for this species. Environmental legislation, such as the Oslo-Paris Convention (OSPAR), has agreed on the monitoring of concentration of POPs in common terns...
April 5, 2017: Environmental Science and Pollution Research International
keyword
keyword
33143
1
2
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read
×

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"