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https://www.readbyqxmd.com/read/28531953/priority-pesticides-abatement-by-advanced-water-technologies-the-case-of-acetamiprid-removal-by-ozonation
#1
A Cruz-Alcalde, C Sans, S Esplugas
With the aim of exploring treatment alternatives for priority insecticide acetamiprid (ACMP) abatement, the removal of this compound from water by ozonation was studied for the first time, paying special attention to the kinetic, mechanistic and toxicological aspects of the process. The second order rate constants of reactions between ACMP and both molecular ozone (O3) and hydroxyl radicals (OH) were determined to be 0.25M(-1)s(-1) and 2.1·10(9)M(-1)s(-1), respectively. On the basis of kinetic results, the degradation of ACMP during ozonation could be well-explained by the reactivity of this pesticide with OH...
May 17, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28531911/risk-factors-for-gastric-tumorigenesis-in-underlying-gastric-mucosal-atrophy
#2
Ji Hyun Song, Sang Gyun Kim, Eun Hyo Jin, Joo Hyun Lim, Sun Young Yang
Background/Aims: Atrophic gastritis is considered a premalignant lesion. We aimed to evaluate the risk factors for gastric tumorigenesis in underlying mucosal atrophy. Methods: A total of 10,185 subjects who underwent upper gastrointestinal endoscopy between 2003 and 2004 were enrolled in this retrospective cohort study. Follow-up endoscopy was performed between 2005 and 2014. Atrophic gastritis and intestinal metaplasia were assessed by endoscopy using the Kimura-Takemoto classification...
May 23, 2017: Gut and Liver
https://www.readbyqxmd.com/read/28529032/synergistic-cytotoxicity-of-lenalidomide-and-dexamethasone-in-mantle-cell-lymphoma-via-cereblon-dependent-targeting-of-the-il-6-stat3-pi3k-axis
#3
Jiexian Ma, Kefei Wu, Weiya Bai, Xiaoxian Cui, Yan Chen, Youhua Xie, Yanhui Xie
At our center, relapsed mantle cell lymphoma (MCL) can be treated with maintenance therapy composed of consecutive low-dose lenalidomide and short-term, high-dose dexamethasone (LD regimen), which achieves good responses (longer overall survival and progression-free survival) and low toxicity. Cereblon is probably targeted by both lenalidomide and dexamethasone, which leads to synergistic cytotoxicity in MCL by inhibiting the interleukin-6/signal transducer and activator of transcription 3 (IL-6/STAT3), phosphatidylinositol 3-kinase (PI3K)/AKT and AKT2/Forkhead box O3 (FOXO3A)/BCL2-like 11 (BIM) pathways...
May 10, 2017: EBioMedicine
https://www.readbyqxmd.com/read/28527212/apolipoprotein-e4-gender-body-mass-index-inflammation-insulin-resistance-and-air-pollution-interactions-recipe-for-alzheimer-s-disease-development-in-mexico-city-young-females
#4
Lilian Calderón-Garcidueñas, Suzanne M de la Monte
Given the epidemiological trends of increasing Alzheimer's disease (AD) and growing evidence that exposure and lifestyle factors contribute to AD risk and pathogenesis, attention should be paid to variables such as air pollution, in order to reduce rates of cognitive decline and dementia. Exposure to fine particulate matter (PM2.5) and ozone (O3) above the US EPA standards is associated with AD risk. Mexico City children experienced pre- and postnatal high exposures to PM2.5, O3, combustion-derived iron-rich nanoparticles, metals, polycyclic aromatic hydrocarbons, and endotoxins...
May 17, 2017: Journal of Alzheimer's Disease: JAD
https://www.readbyqxmd.com/read/28514452/isotopic-evidence-of-multiple-controls-on-atmospheric-oxidants-over-climate-transitions
#5
Lei Geng, Lee T Murray, Loretta J Mickley, Pu Lin, Qiang Fu, Andrew J Schauer, Becky Alexander
The abundance of tropospheric oxidants, such as ozone (O3) and hydroxyl (OH) and peroxy radicals (HO2 + RO2), determines the lifetimes of reduced trace gases such as methane and the production of particulate matter important for climate and human health. The response of tropospheric oxidants to climate change is poorly constrained owing to large uncertainties in the degree to which processes that influence oxidants may change with climate and owing to a lack of palaeo-records with which to constrain levels of atmospheric oxidants during past climate transitions...
May 17, 2017: Nature
https://www.readbyqxmd.com/read/28513980/solid-state-carbon-dots-with-red-fluorescence-and-efficient-construction-of-dual-fluorescence-morphologies
#6
Jiangling He, Youling He, Yonghao Chen, Bingfu Lei, Jianle Zhuang, Yong Xiao, Yeru Liang, Mingtao Zheng, Haoran Zhang, Yingliang Liu
Stable solid-state red fluorescence from organosilane-functionalized carbon dots (CDs) with sizes around 3 nm is reported for the first time. Meanwhile, a novel method is also first reported for the efficient construction of dual-fluorescence morphologies. The quantum yield of these solid-state CDs and their aqueous solution is 9.60 and 50.7%, respectively. The fluorescence lifetime is 4.82 ns for solid-state CDs, and 15.57 ns for their aqueous solution. These CDs are detailedly studied how they can exhibit obvious photoluminescence overcoming the self-quenching in solid state...
May 17, 2017: Small
https://www.readbyqxmd.com/read/28510489/urban-heat-island-uhi-influence-on-secondary-pollutant-formation-at-a-tropical-humid-environment
#7
Gsnvksn Swamy, S M Shiva Nagendra, Uwe Shlink
The combined action of urbanization (change in land use) and increase in vehicular emissions intensify the urban heat island (UHI) effect in many cities in the developed countries. The urban warming (UHI) enhances heat stress related diseases and ozone (O3) levels due to a photochemical reaction. Even though UHI intensity depends on wind speed, wind direction and solar flux, the thermodynamic properties of surface materials can accelerate the temperature profiles at the local scale. This mechanism modifies the atmospheric boundary layer (ABL) structure and mixing height in urban regions...
May 16, 2017: Journal of the Air & Waste Management Association
https://www.readbyqxmd.com/read/28507327/pde3-inhibitor-and-egcg-combination-treatment-suppress-cancer-stem-cell-properties-in-pancreatic-ductal-adenocarcinoma
#8
Motofumi Kumazoe, Mika Takai, Shun Hiroi, Chieri Takeuchi, Maasa Yamanouchi, Takashi Nojiri, Hiroaki Onda, Jaehoon Bae, Yuhui Huang, Kanako Takamatsu, Shuya Yamashita, Shuhei Yamada, Kenji Kangawa, Takashi Takahashi, Hiroshi Tanaka, Hirofumi Tachibana
Recurrence following chemotherapy is observed in the majority of patients with pancreatic ductal adenocarcinoma (PDAC). Recent studies suggest that cancer stem cells (CSCs) may be involved in PDAC recurrence and metastasis. However, an efficient approach to targeting pancreatic CSCs remains to be established. Here we show that in cancer cells overexpressing the 67-kDa laminin receptor (67LR)-dependent cyclic GMP (cGMP) inducer, epigallocatechin-3-O-gallate (EGCG) and a phosphodiesterase 3 (PDE3) inhibitor in combination significantly suppressed the Forkhead box O3 and CD44 axis, which is indispensable for the CSC properties of PDAC...
May 15, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28507102/foxo3-pgc-1%C3%AE-signaling-axis-is-essential-for-cancer-stem-cell-properties-of-pancreatic-ductal-adenocarcinoma
#9
Motofumi Kumazoe, Mika Takai, Shun Hiroi, Chieri Takeuchi, Mai Kadomatsu, Takashi Nojiri, Hiroaki Onda, Jaehoon Bae, Yuhui Huang, Kanako Takamatsu, Shuya Yamashita, Kenji Kangawa, Hirofumi Tachibana
In 95% of patients with pancreatic ductal adenocarcinoma (PDAC), recurrence is observed following chemotherapy. Findings from several studies have indicated that cancer stem cells (CSCs) are resistant to anti-cancer agents and may be involved in cancer recurrence and metastasis. The CD44 protein is a major CSC marker, and CD44 also plays an indispensable role in the CSC properties in several cancers, including pancreatic cancer; however, no clinical approach exists to inhibit CD44 activity. Here, we have performed knockin/knock down experiments and we demonstrate that the forkhead box O3 (FOXO3)/liver kinase B1 (LKB1)/AMP-activated protein kinase (AMPK)/PPAR-γ co-activator-1β (PGC- 1β)/pyruvate dehydrogenase -A1 (PDHA1) pathway is essential for CD44 expression and CSC properties...
May 15, 2017: Journal of Biological Chemistry
https://www.readbyqxmd.com/read/28505430/proteins-and-amino-acids-in-fine-particulate-matter-in-rural-guangzhou-southern-china-seasonal-cycles-sources-and-atmospheric-processes
#10
Tianli Song, Shan Wang, Yingyi Zhang, Junwei Song, Fobang Liu, Pingqing Fu, Manabu Shiraiwa, Zhiyong Xie, Dingli Yue, Liuju Zhong, Junyu Zheng, Senchao Lai
Water-soluble proteinaceous matter including proteins and free amino acids (FAAs) as well as some other chemical components was analyzed in fine particulate matter (PM2.5) samples collected over a period of one year in rural Guangzhou. Annual averaged protein and total FAAs concentrations were 0.79 ± 0.47 µg m-3 and 0.13 ± 0.05 µg m-3, accounting for 1.9 ± 0.7% and 0.3 ± 0.1% of PM2.5, respectively. Among FAAs, glycine was the most abundant species (19.9%), followed by valine (18.5%), methionine (16.1%) and phenylalanine (13...
May 15, 2017: Environmental Science & Technology
https://www.readbyqxmd.com/read/28503684/phase-transformations-anisotropic-pyroelectric-energy-harvesting-and-electrocaloric-properties-of-pb-la-zr-sn-ti-o3-single-crystals
#11
Fangping Zhuo, Qiang Li, Jinghan Gao, Qingfeng Yan, Yiling Zhang, Xiaoqing Xi, Xiangcheng Chu
(Pb,La)(Zr,Sn,Ti)O3 (PLZST) single crystals with their chemical composition located at the tetragonal antiferroelectric region are grown via the flux method in a PbO-PbF2-B2O3 mixture. Segregation of the Ti(4+) component in the as-grown crystals is observed due to the strong affinity between the oxygen anion and Ti(4+) ions. The critical electric field of the antiferroelectric to ferroelectric phase transition is determined to be about 0.5 kV mm(-1). The electric field induced ferroelectric phase transforms back into the antiferroelectric phase at a depolarization temperature of 125 °C...
May 15, 2017: Physical Chemistry Chemical Physics: PCCP
https://www.readbyqxmd.com/read/28502994/depoling-and-fatigue-behavior-of-pb-mg1-3nb2-3-o3-pbtio3-single-crystal-at-megahertz-frequencies-under-bipolar-electric-field
#12
Zhaojiang Chen, Shiyang Li, Yang Zhang, Wenwu Cao
Bipolar electric field induced degradation in [001]c poled Pb(Mg1/3Nb2/3)O3-0.29PbTiO3 (PMN-0.29PT) single crystals was investigated at megahertz frequencies. The electromechanical coupling factor kt , dielectric constant εr , dielectric loss D, and piezoelectric constant d33 were measured as a function of amplitude, frequency, and number of cycles of the applied electric field. Our results showed that samples degrade rapidly when the field amplitude is larger than a critical value due to the onset of domain switching...
May 7, 2017: Journal of Applied Physics
https://www.readbyqxmd.com/read/28501677/modeling-variability-in-air-pollution-related-health-damages-from-individual-airport-emissions
#13
Stefani L Penn, Scott T Boone, Brian C Harvey, Wendy Heiger-Bernays, Yorghos Tripodis, Sarav Arunachalam, Jonathan I Levy
In this study, we modeled concentrations of fine particulate matter (PM2.5) and ozone (O3) attributable to precursor emissions from individual airports in the United States, developing airport-specific health damage functions (deaths per 1000t of precursor emissions) and physically-interpretable regression models to explain variability in these functions. We applied the Community Multiscale Air Quality model using the Decoupled Direct Method to isolate PM2.5- or O3-related contributions from precursor pollutants emitted by 66 individual airports...
May 11, 2017: Environmental Research
https://www.readbyqxmd.com/read/28501653/incorporating-wind-availability-into-land-use-regression-modelling-of-air-quality-in-mountainous-high-density-urban-environment
#14
Yuan Shi, Kevin Ka-Lun Lau, Edward Ng
Urban air quality serves as an important function of the quality of urban life. Land use regression (LUR) modelling of air quality is essential for conducting health impacts assessment but more challenging in mountainous high-density urban scenario due to the complexities of the urban environment. In this study, a total of 21 LUR models are developed for seven kinds of air pollutants (gaseous air pollutants CO, NO2, NOx, O3, SO2 and particulate air pollutants PM2.5, PM10) with reference to three different time periods (summertime, wintertime and annual average of 5-year long-term hourly monitoring data from local air quality monitoring network) in Hong Kong...
May 11, 2017: Environmental Research
https://www.readbyqxmd.com/read/28498920/copy-number-variation-of-functional-rbmy1-is-associated-with-sperm-motility-an-azoospermia-factor-linked-candidate-for-asthenozoospermia
#15
Yuanlong Yan, Xiling Yang, Yunqiang Liu, Ying Shen, Wenling Tu, Qiang Dong, Dong Yang, Yongyi Ma, Yuan Yang
STUDY QUESTION: What is the influence of copy number variation (CNV) in functional RNA binding motif protein Y-linked family 1 (RBMY1) on spermatogenic phenotypes? SUMMARY ANSWER: The RBMY1 functional copy dosage is positively correlated with sperm motility, and dosage insufficiency is an independent risk factor for asthenozoospermia. WHAT IS KNOWN ALREADY: RBMY1, a multi-copy gene expressed exclusively in the adult testis, is one of the most important candidates for male infertility in the azoospermia factor (AZF) region of the Y-chromosome...
May 12, 2017: Human Reproduction
https://www.readbyqxmd.com/read/28498668/kinetics-of-the-reactions-of-no3-radical-with-methacrylate-esters
#16
Li Zhou, A R Ravishankara, Steven S Brown, Mahmoud Idir, Kyle J Zarzana, Veronique Daele, Abdelwahid Mellouki
Two different experimental methods (relative rate and absolute rate methods) were used to measure the rate coefficients for the reactions of NO3 radical with six methacrylate esters: methyl methacrylate (MMA, k1), ethyl methacrylate (EMA, k2), propyl methacrylate (PMA, k3), isopropyl methacrylate (IPMA, k4), butyl methacrylate (BMA, k5), isobutyl methacrylate (IBMA, k6). In the relative rate method, the loss of the esters relative to that of a reference compound was followed in a 7300 L Teflon-walled chamber at (298±2) K and (1000±5) hpa...
May 12, 2017: Journal of Physical Chemistry. A
https://www.readbyqxmd.com/read/28498059/oligodendroglioma-resection-a-surveillance-epidemiology-and-end-results-seer-analysis
#17
Ali A Alattar, Michael G Brandel, Brian R Hirshman, Xuezhi Dong, Kate T Carroll, Mir Amaan Ali, Bob S Carter, Clark C Chen
OBJECTIVE The available evidence suggests that the clinical benefits of extended resection are limited for chemosensitive tumors, such as primary CNS lymphoma. Oligodendroglioma is generally believed to be more sensitive to chemotherapy than astrocytoma of comparable grades. In this study the authors compare the survival benefit of gross-total resection (GTR) in patients with oligodendroglioma relative to patients with astrocytoma. METHODS Using the Surveillance, Epidemiology, and End Results (SEER) Program (1999-2010) database, the authors identified 2378 patients with WHO Grade II oligodendroglioma (O2 group) and 1028 patients with WHO Grade III oligodendroglioma (O3 group)...
May 12, 2017: Journal of Neurosurgery
https://www.readbyqxmd.com/read/28497775/optical-evidence-for-the-spin-state-disorder-in-laco1-x-rh-x-o3
#18
Ichiro Terasaki, Shinichiro Asai, Hiroki Taniguchi, Ryuji Okazaki, Yukio Yasui, Yuka Ikemoto, Taro Moriwaki
We have measured the infrared reflectivity of single-crystalline samples of LaCo1-x Rh x O3 (x  =  0, 0.05 and 0.10) from 10 to 300 K from 0.05 to 0.15 eV. We find that the optical phonons of the Co-O stretching mode depend on temperature and the Rh content. Analysis with three Lorentz oscillators reveals that the spin state of Co(3+) in LaCo1-x Rh x O3 can be understood in terms of a solid solution of low-spin- and high-spin-state Co(3+) ions, and the substituted Rh ion retains some fraction of the high-spin Co(3+) ions down to low temperature...
May 12, 2017: Journal of Physics. Condensed Matter: An Institute of Physics Journal
https://www.readbyqxmd.com/read/28497695/origin-of-in-situ-domain-formation-of-heavily-nb-doped-pb-zr-ti-o3-thin-films-sputtered-on-ir-tiw-sio2-si-substrates-for-mobile-sensor-applications
#19
Chan Su Han, Kyu Sik Park, Hong Je Choi, Yong Soo Cho
High-quality piezoelectric thin films have recently been in demand for mobile sensor applications. An investigation was conducted to understand the improvements in the piezoelectric and imprint characteristics of heavily Nb-doped lead zirconate titanate thin films with an extensive range of Nb content (up to 14 mol %) beyond the typical solid solubility limit of Nb. The positive effects produced by the unusual doping of Nb were realized by utilizing an in situ sputtering process that did not require a subsequent annealing and poling procedure...
May 22, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28496412/nitric-oxide-synthase-activity-correlates-with-ogg1-in-ozone-induced-lung-injury-animal-models
#20
Suqin Zhang, Jianhua Li, Yuqin Li, Yufeng Liu, Hongxiang Guo, Xiaoli Xu
Background: NO is an important cellular signaling molecule which is derived from L-arginine by nitric oxide synthase (NOS) and the effects of NOS signaling in lung injury is conflicting. The present study was designed to observe the effect of NOS and Arginase signaling in the occurrence and development of lung injury and its mechanism. Methods: An ozone-stressed lung injury animal model was established by exposure to 2.0 ppm O3 for 30 min every day for consecutive 12 day with or without the administration of NO precursor L-arginine or non-selective NOS inhibitor N-nitro-L-arginine methyl ester (L-NAME)...
2017: Frontiers in Physiology
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