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https://www.readbyqxmd.com/read/28422480/chemical-characterization-of-gas-and-particle-phase-products-from-the-ozonolysis-of-%C3%AE-pinene-in-the-presence-of-dimethylamine
#1
Geoffroy Duporté, Matthieu Riva, Jevgeni Parshintsev, Enna Heikkinen, Luis M F Barreira, Nanna Myllys, Liine Heikkinen, Kari Mikael Hartonen, Markku Kulmala, Mikael Ehn, Marja-Liisa Riekkola
Amines are recognized as key compounds in new particle formation (NPF) and secondary organic aerosol (SOA) formation. In addition, ozonolysis of α-pinene contributes substantially to the formation of biogenic SOAs in the atmosphere. In the present study, ozonolysis of α-pinene in presence of dimethylamine (DMA) was investigated in a flow tube reactor. Effects of amines on SOA formation and chemical composition were examined. Enhancement of NPF and SOA formation was observed in presence of DMA. Chemical characterization of gas- and particle-phase products by high-resolution mass spectrometric techniques revealed the formation of nitrogen containing compounds...
April 19, 2017: Environmental Science & Technology
https://www.readbyqxmd.com/read/28391951/source-apportionment-of-pahs-and-n-alkanes-bound-to-pm1-collected-near-the-venice-highway
#2
Gabrio Valotto, Giancarlo Rampazzo, Francesco Gonella, Gianni Formenton, Silvia Ficotto, Giorgia Giraldo
n-Alkanes and polycyclic aromatic hydrocarbons (PAHs) bound to atmospheric particulate matter (PM1) were investigated in a traffic site located in an urban area of Venice Province (Eastern Po Valley, Italy) during the cold season. Considering the critical situation affecting the Veneto Region concerning the atmospheric pollution and the general lack of information on PM1 composition and emission in this area, this experimental study aims at determining the source profile, their relative contributions and the dispersion of finer particles...
April 2017: Journal of Environmental Sciences (China)
https://www.readbyqxmd.com/read/28391923/evolutionary-processes-and-sources-of-high-nitrate-haze-episodes-over-beijing-spring
#3
Ting Yang, Yele Sun, Wei Zhang, Zifa Wang, Xingang Liu, Pingqing Fu, Xiquan Wang
Rare and consecutive high-nitrate haze pollution episodes were observed in Beijing in spring 2012. We present detailed characterization of the sources and evolutionary mechanisms of this haze pollution, and focus on an episode that occurred between 15 and 26 April. Submicron aerosol species were found to be substantially elevated during haze episodes, and nitrates showed the largest increase and occupation (average: 32.2%) in non-refractory submicron particles (NR-PM1), which did not occur in other seasons as previously reported...
April 2017: Journal of Environmental Sciences (China)
https://www.readbyqxmd.com/read/28389029/characterization-of-short-and-medium-chain-chlorinated-paraffins-in-outdoor-indoor-pm10-pm2-5-pm1-0-in-beijing-china
#4
Huiting Huang, Lirong Gao, Dan Xia, Lin Qiao, Runhua Wang, Guijin Su, Wenbin Liu, Guorui Liu, Minghui Zheng
Persistent organic pollutants (POPs) were listed in the Stockholm Convention, because of their adverse health effects, persistence, bioaccumulation and ubiquitous presence in the environment. Short chain chlorinated paraffins (SCCPs), chlorinated derivatives of n-alkanes, have been listed as candidate POPs under Stockholm Convention. Inhalation uptake was an important exposure pathway for non-occupational adult human and the pollution of particle matter has caused great concern. There are some studies focused on POPs such as polychlorinated biphenyls, polychlorinated dibenzo-p-dioxins and dibenzofurans and polybrominated diphenyl ethers in different size particles...
April 4, 2017: Environmental Pollution
https://www.readbyqxmd.com/read/28387856/involvement-of-c-terminal-histidines-in-soybean-pm1-protein-oligomerization-and-cu2-binding
#5
Guobao Liu, Ke Liu, Yang Gao, Yizhi Zheng
Late embryogenesis abundant (LEA) proteins are widely distributed among plant species, where they contribute to abiotic stress tolerance. LEA proteins can be classified into seven groups according to conserved sequence motifs. The PM1 protein from soybean, which belongs to the Pfam LEA_1 group, has been shown previously to be at least partially natively unfolded, to bind metal ions and potentially to stabilize proteins and membranes. Here, we investigated the role of the PM1 C-terminal domain and in particular the multiple histidine residues in this half of the protein...
April 6, 2017: Plant & Cell Physiology
https://www.readbyqxmd.com/read/28376835/indoor-air-pollution-and-its-association-with-poor-lung-function-microalbuminuria-and-variations-in-blood-pressure-among-kitchen-workers-in-india-a-cross-sectional-study
#6
Amarnath Singh, Chandrasekharan Nair Kesavachandran, Ritul Kamal, Vipin Bihari, Afzal Ansari, Parappurath Abdul Azeez, Prem Narain Saxena, Anil Kumar Ks, Altaf Hussain Khan
BACKGROUND: The present study is an attempt to explore the association between kitchen indoor air pollutants and physiological profiles in kitchen workers with microalbuminuria (MAU) in north India (Lucknow) and south India (Coimbatore). METHODS: The subjects comprised 145 control subjects, 233 kitchen workers from north India and 186 kitchen workers from south India. Information related to the personal and occupational history and health of the subjects at both locations were collected using a custom-made questionnaire...
April 4, 2017: Environmental Health: a Global Access Science Source
https://www.readbyqxmd.com/read/28303958/sophisticated-clean-air-strategies-required-to-mitigate-against-particulate-organic-pollution
#7
T Grigas, J Ovadnevaite, D Ceburnis, E Moran, F M McGovern, S G Jennings, C O'Dowd
Since the 1980's, measures mitigating the impact of transboundary air pollution have been implemented successfully as evidenced in the 1980-2014 record of atmospheric sulphur pollution over the NE-Atlantic, a key region for monitoring background northern-hemisphere pollution levels. The record reveals a 72-79% reduction in annual-average airborne sulphur pollution (SO4 and SO2, respectively) over the 35-year period. The NE-Atlantic, as observed from the Mace Head research station on the Irish coast, can be considered clean for 64% of the time during which sulphate dominates PM1 levels, contributing 42% of the mass, and for the remainder of the time, under polluted conditions, a carbonaceous (organic matter and Black Carbon) aerosol prevails, contributing 60% to 90% of the PM1 mass and exhibiting a trend whereby its contribution increases with increasing pollution levels...
March 17, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28279581/exposure-of-in-pram-babies-to-airborne-particles-during-morning-drop-in-and-afternoon-pick-up-of-school-children
#8
Prashant Kumar, Ioar Rivas, Lovish Sachdeva
In-pram babies are more susceptible to air pollution effects, yet studies assessing their exposure are limited. We measured size-resolved particle mass (PMC; 0.25-32 μm) and number (PNC; 0.2-1 μm) concentrations on a 2.7 km route. The instruments were placed inside a baby pram. The route passed through 4 traffic intersections (TIs) and a bus stand. A total of ∼87 km road length was covered through 64 trips, made during school drop-in (morning) and pick-up (afternoon) hours. The objectives were to assess PMC and PNC exposure to in-pram babies at different route segments, understand their physicochemical characteristics and exposure differences between in-pram babies and adults carrying them...
March 6, 2017: Environmental Pollution
https://www.readbyqxmd.com/read/28278029/overview-of-surface-measurements-and-spatial-characterization-of-submicron-particulate-matter-during-the-discover-aq-2013-campaign-in-houston
#9
Y J Leong, N P Sanchez, H W Wallace, B Karakurt Cevik, C S Hernandez, Y Han, J H Flynn, P Massoli, C Floerchinger, E C Fortner, S Herndon, J K Bean, L Hildebrandt Ruiz, W Jeon, Y Choi, B Lefer, R J Griffin
The sources of submicron particulate matter (PM1) remain poorly characterized in the industrialized city of Houston. A mobile sampling approach was used to characterize PM1 composition and concentration across Houston based on high time resolution measurements of non-refractory PM1 and trace gases during the DISCOVER-AQ Texas 2013 campaign. Two pollution zones with marked differences in PM1 levels, character, and dynamics were established based on cluster analysis of organic aerosol mass loadings sampled at sixteen sites...
February 28, 2017: Journal of the Air & Waste Management Association
https://www.readbyqxmd.com/read/28268029/exposure-to-polycyclic-aromatic-hydrocarbons-in-atmospheric-pm1-0-of-urban-environments-carcinogenic-and-mutagenic-respiratory-health-risk-by-age-groups
#10
Dayana M Agudelo-Castañeda, Elba C Teixeira, Ismael L Schneider, Sheila Rincón Lara, Luis F O Silva
We investigated the carcinogenic and mutagenic respiratory health risks related to the exposure to atmospheric PAHs in an urban area. Our study focused in the association of these pollutants and their possible effect in human health, principally respiratory and circulatory diseases. Also, we determined a relationship between the inhalation risk of PAHs and meteorological conditions. We validated the hypothesis that in winter PAHs with high molecular weight associated to submicron particles (PM1) may increase exposure risk, especially for respiratory diseases, bronchitis and pneumonia diseases...
March 4, 2017: Environmental Pollution
https://www.readbyqxmd.com/read/28254051/chemical-characterization-and-source-apportionment-of-atmospheric-submicron-particles-on-the-western-coast-of-taiwan-strait-china
#11
Liming Cao, Qiao Zhu, Xiaofeng Huang, Junjun Deng, Jinsheng Chen, Youwei Hong, Lingling Xu, Lingyan He
Taiwan Strait is a special channel for subtropical East Asian Monsoon and its western coast is an important economic zone in China. In this study, a suburban site in the city of Xiamen on the western coast of Taiwan Strait was selected for fine aerosol study to improve the understanding of air pollution sources in this region. An Aerodyne high-resolution time-of-flight aerosol mass spectrometer (HR-ToF-AMS) and an Aethalometer were deployed to measure fine aerosol composition with a time resolution of 5 min from May 1 to 18, 2015...
February 2017: Journal of Environmental Sciences (China)
https://www.readbyqxmd.com/read/28245275/the-effect-of-size-segregated-ambient-particulate-matter-on-th1-th2-like-immune-responses-in-mice
#12
Kuo-Liang Huang, Szu-Yuan Liu, Charles C K Chou, Yi-Hsin Lee, Tsun-Jen Cheng
BACKGROUND: Particulate matter (PM) has been associated with increased pulmonary and cardiovascular mortality and morbidity. Additionally, PM is known to exacerbate asthma. However, whether ambient PM exposure contributes to the onset of asthma, especially in non-atopic children and adults, is less conclusive. The current study aimed to evaluate the effects of size-fractioned PM on lung immune responses in healthy BALB/c mice. METHODS AND PRINCIPAL FINDINGS: We collected PM10, PM2...
2017: PloS One
https://www.readbyqxmd.com/read/28243330/preoperative-albumin-to-globulin-ratio-agr-as-prognostic-factor-in-renal-cell-carcinoma
#13
Xiaobo He, Shengjie Guo, Dong Chen, Guangwei Yang, Xin Chen, Yijun Zhang, Qiuming He, Zike Qin, Zhuowei Liu, Yunfei Xue, Meng Zhang, Ruiwu Liu, Fangjian Zhou, Hui Han, Kai Yao
Background: Malnutrition and systemic inflammatory response are frequently associated with prognosis in patients with several types of cancer, including renal cell carcinoma (RCC). The study is aimed to investigate the ability of preoperative serum albumin to globulin ratio (AGR) to predict the long-term mortality of RCC patients. Methods: The study is a retrospective study of an unselected cohort of 895 RCC patients who underwent a curative radical or partial nephrectomy at the Department of Urology in the Sun Yat-Sen University Cancer Center between January 2000 and December 2012 and had documented preoperative serum total protein and albumin (ALB) levels...
2017: Journal of Cancer
https://www.readbyqxmd.com/read/28238437/impact-of-size-distributions-of-major-chemical-components-in-fine-particles-on-light-extinction-in-urban-guangzhou
#14
Yunjie Xia, Jun Tao, Leiming Zhang, Renjian Zhang, Shuanglin Li, Yunfei Wu, Junji Cao, Xiaojia Wang, Qingxia Ma, Zhe Xiong
To evaluate the impact of fine particulate matter (PM2.5) size distribution on aerosol chemical and optical properties, dominant chemical components including water-soluble inorganic ions (WSII), organic carbon (OC) and elemental carbon (EC) in PM1 and PM2.5, aerosol scattering coefficient (bsp), and aerosol absorption coefficient (bap) were collected synchronously at an urban site in Guangzhou, south China during a typical summer month in 2009 and a winter month in 2010. PM1 (sizes smaller than 1μm) constituted 77% and 63% of PM2...
February 23, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28212280/biofilm-formation-and-immunomodulatory-activity-of-proteus-mirabilis-clinically-isolated-strains
#15
Alessandra Fusco, Lorena Coretti, Vittoria Savio, Elisabetta Buommino, Francesca Lembo, Giovanna Donnarumma
Urinary tract infections (UTIs) and catheter-associated UTIs (CAUTIs) are the principal hospital-acquired infections. Proteus mirabilis is characterized by several virulence factors able to promote adhesion and biofilm formation and ameliorate the colonization of urinary tract and the formation of crystalline biofilms on the abiotic surface of the urinary catheters. Since, to date, the role of P. mirabilis in the etiopathogenesis of different types of urinary tract infections is not well established, in this study we sought to characterize two different clinically isolated strains of P...
February 15, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/28190687/short-term-effects-of-particle-size-fractions-on-circulating-biomarkers-of-inflammation-in-a-panel-of-elderly-subjects-and-healthy-young-adults
#16
Mohammad Sadegh Hassanvand, Kazem Naddafi, Homa Kashani, Sasan Faridi, Nino Kunzli, Ramin Nabizadeh, Fatemeh Momeniha, Akbar Gholampour, Mohammad Arhami, Ahad Zare, Zahra Pourpak, Mohammad Hoseini, Masud Yunesian
Systemic inflammation biomarkers have been associated with risk of cardiovascular morbidity and mortality. We aimed to clarify associations of acute exposure to particulate matter (PM10 (PM < 10 μm), PM2.5-10 (PM 2.5-10 μm), PM2.5 (PM < 2.5 μm), PM1-2.5 (PM 1-2.5 μm), and PM1 (PM < 1 μm)) with systemic inflammation using panels of elderly subjects and healthy young adults. We followed a panel of 44 nonsmoking elderly subjects living in a retirement home and a panel of 40 healthy young adults living in a school dormitory in Tehran city, Iran from May 2012 to May 2013...
April 2017: Environmental Pollution
https://www.readbyqxmd.com/read/28188054/exposure-to-air-pollutants-during-commuting-in-london-are-there-inequalities-among-different-socio-economic-groups
#17
Ioar Rivas, Prashant Kumar, Alex Hagen-Zanker
People with low income often experience higher exposures to air pollutants. We compared the exposure to particulate matter (PM1, PM2.5 and PM10), Black Carbon (BC) and ultrafine particles (PNCs; 0.02-1μm) for typical commutes by car, bus and underground from 4 London areas with different levels of income deprivation (G1 to G4, from most to least deprived). The highest BC and PM concentrations were found in G1 while the highest PNC in G3. Lowest concentrations for all pollutants were observed in G2. We found no systematic relationship between income deprivation and pollutant concentrations, suggesting that differences between transport modes are a stronger influence...
April 2017: Environment International
https://www.readbyqxmd.com/read/28166074/airborne-particulate-matter-and-health-condition-in-brick-kiln-workers-in-kathmandu-valley-nepal
#18
S Sanjel, S N Khanal, S M Thygerson, K Khanal, Z Pun, S Tamang, S K Joshi
Background Air quality monitoring in brick kilns indicates very high concentrations of airborne particulate matter. Air pollution from brick kilns poses an enhanced threat to the environment and to human health. Objective To evaluate airborne particulate matter concentration and health status of brick kiln workers. Method A cross-sectional comparative study was conducted in the Kathmandu valley targeting all brick industries and their workers during January - March 2015 and March - April 2016. A total of 16 brick kilns and 800 participants (400 brick workers as exposed and 400 grocery workers as referent) were selected for study...
April 2016: Kathmandu University Medical Journal (KUMJ)
https://www.readbyqxmd.com/read/28139370/lymph-node-density-vs-the-american-joint-committee-on-cancer-tnm-nodal-staging-system-in-node-positive-bladder-cancer-in-patients-undergoing-extended-or-super-extended-pelvic-lymphadenectomy
#19
Donghyun Lee, Sangjun Yoo, Dalsan You, Bumsik Hong, Yong Mee Cho, Jun Hyuk Hong, Choung-Soo Kim, Hanjonh Ahn, Jae Y Ro, In Gab Jeong
PURPOSE: We compared the prognostic value of the American Joint Committee on Cancer (AJCC) TNM nodal staging system with that of lymph node (LN) density in patients with LN-positive bladder cancer who received extended or super-extended pelvic lymphadenectomy. METHODS: Of the 1,018 patients, who underwent radical cystectomy and pelvic lymphadenectomy between February 2005 and August 2014, 110 patients with LN metastases with extended (n = 68) or super-extended (n = 42) pelvic lymphadenectomy were included...
January 27, 2017: Urologic Oncology
https://www.readbyqxmd.com/read/28131450/regional-and-long-range-transport-of-aerosols-at-mt-aitana-southeastern-spain
#20
Nuria Galindo, Eduardo Yubero, Jose F Nicolás, Javier Crespo, Montse Varea, Juan Gil-Moltó
More than 150 particulate matter (PM) samples with aerodynamic diameters smaller than 1 and 10μm (PM1 and PM10, respectively) were collected during an 18-month sampling campaign at Mt. Aitana (1558m a.s.l.), located in the western Mediterranean basin. PM samples were analyzed for water-soluble ions, carbonaceous species and trace metals using standard procedures. Average mass concentrations of PM1 and PM10 were, respectively, 5.0 and 13.3μgm(-3). PM1 was composed mostly of organic carbon and ammonium sulfate, while nitrate and crustal elements were major components of the PM10 fraction...
April 15, 2017: Science of the Total Environment
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