keyword
MENU ▼
Read by QxMD icon Read
search

PM1

keyword
https://www.readbyqxmd.com/read/29406120/air-pollution-and-inhalation-exposure-to-particulate-matter-of-different-sizes-in-rural-households-using-improved-stoves-in-central-china
#1
Weijian Liu, Guofeng Shen, Yuanchen Chen, Huizhong Shen, Ye Huang, Tongchao Li, Yilong Wang, Xiaofang Fu, Shu Tao, Wenxin Liu, Yibo Huang-Fu, Weihao Zhang, Chunyu Xue, Guangqing Liu, Fuyong Wu, Minghung Wong
Household air pollution is considered to be among the top environmental risks in China. To examine the performance of improved stoves for reduction of indoor particulate matter (PM) emission and exposure in rural households, individual inhalation exposure to size-resolved PM was investigated using personal portable samplers carried by residents using wood gasifier stoves or improved coal stoves in a rural county in Central China. Concentrations of PM with different sizes in stationary indoor and outdoor air were also monitored at paired sites...
January 2018: Journal of Environmental Sciences (China)
https://www.readbyqxmd.com/read/29406101/characterization-of-submicron-particles-during-autumn-in-beijing-china
#2
Peng Xu, Junke Zhang, Dongsheng Ji, Zirui Liu, Guiqian Tang, Changsheng Jiang, Yuesi Wang
In this study, we performed a highly time-resolved chemical characterization of non-refractory submicron particles (NR-PM1) in Beijing by using an Aerodyne high-resolution time-of-flight aerosol mass spectrometer (HR-ToF-AMS). The results showed the average NR-PM1 mass concentration to be 56.4±58.0μg/m3, with a peak at 307.4μg/m3. Due to the high frequency of biomass burning in autumn, submicron particles significantly increased in organic content, which accounted for 51% of NR-PM1 on average. Secondary inorganic aerosols (sulfate+nitrate+ammonium) accounted for 46% of NR-PM1, of which sulfate, nitrate, and ammonium contributed 15%, 20%, and 11%, respectively...
January 2018: Journal of Environmental Sciences (China)
https://www.readbyqxmd.com/read/29394807/-a-case-of-successful-adjuvant-surgery-for-the-pancreas-head-cancer-with-peritoneal-metastasis
#3
Yukie Kyakumoto, Tatsuyuki Takadate, Masamichi Mizuma, Tatsuo Hata, Masahiro Iseki, Hideo Ohtsuka, Naoaki Sakata, Kei Nakagawa, Takanori Morikawa, Hiroki Hayashi, Fuyuhiko Motoi, Takeshi Naitoh, Atsushi Kanno, Tooru Shimosegawa, Michiaki Unno
We report a case of the pancreas head cancer with peritoneal metastasis, which was resected curatively after chemotherapy. A6 6-year-old male was referred to our hospital for the treatment of biliary stenosis. The serum CA19-9 level was elevated and abdominal CT scan showed stenosis of distal bile duct. By laparotomy, we noticed mass in the head of the pancreas with 8mm of the seeding nodule in a diameter at jejunal mesentery which was diagnosed as adenocarcinoma by intraoperative frozen sections. Therefore, the patient was diagnosed as pancreas head cancer with peritoneal metastasis...
November 2017: Gan to Kagaku Ryoho. Cancer & Chemotherapy
https://www.readbyqxmd.com/read/29362340/-a-case-of-double-lung-and-gastric-cancer-involving-para-aortic-lymph-node-metastasis-with-difficult-preoperative-diagnosis
#4
Riki Asakura, Kentaro Kawasaki, Taisuke Okawa, Hiroki Sakamoto, Takahisa Akashi, Yu Asakura, Yoshiyuki Owada, Seiji Haze, Tetsuya Ienaga, Yoshihiro Ikura, Yasuhiro Iwai
A man in his 60s was admitted to our hospital with anemia. An endoscopic examination revealed advanced gastric cancer. CT revealed peri-gastric and para-aortic lymphadenopathy, and a nodular shadow(20mm)in the lower lobe of the right lung. PET-CT revealed abnormal uptake in the para-aortic lymph node and stomach wall and the nodular shadow in the right lung. A bronchoscopy revealed pulmonary adenocarcinoma. From the above, he was diagnosed with gastric cancer(cT4a, cN2, cM1, cStage IV )and lung cancer(cT2a, cN0, cM0, cStage I B)...
January 2018: Gan to Kagaku Ryoho. Cancer & Chemotherapy
https://www.readbyqxmd.com/read/29362330/-two-cases-of-colon-metastasis-of-gastric-cancer-by-different-metastasis-pathway
#5
Ichiro Higuchi, Yosuke Akiyama, Akira Ishikawa, Sanae Hosomi, Takahiko Tanigawa, Yasunori Hasuike, Makoto Miyamoto
We treated 2 cases ofcolon metastasis ofgastric cancer considered to be caused by different pathway. Case 1 was a 55- year-old male with gastric cancer associated with metastases for lymph node, gallbladder, and liver. Curative surgical treatment of distal gastrectomy, partial hepatectomy, cholecystectomy and lymph node dissection was performed. The final find- ing was, L, Less, Type 3, pT4b(GB), tub2, pN3a(10/20), sP0, CY0, pH1, pM1, Stage IV , R0. Ten months after, ileocecal resection was performed, as a tumor was detected in the cecum...
January 2018: Gan to Kagaku Ryoho. Cancer & Chemotherapy
https://www.readbyqxmd.com/read/29327190/chemical-characterization-and-quantitativ-e-assessment-of-source-specific-health-risk-of-trace-metals-in-pm1-0-at-a-road-site-of-delhi-india
#6
Jai Prakash, Tarachand Lohia, Anil K Mandariya, Gazala Habib, Tarun Gupta, Sanjay K Gupta
This study presents the concentration of submicron aerosol (PM1.0) collected during November, 2009 to March, 2010 at two road sites near the Indian Institute of Technology Delhi campus. In winter, PM1.0 composed 83% of PM2.5 indicating the dominance of combustion activity-generated particles. Principal component analysis (PCA) proved secondary aerosol formation as a dominant process in enhancing aerosol concentration at a receptor site along with biomass burning, vehicle exhaust, road dust, engine and tire tear wear, and secondary ammonia...
January 11, 2018: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/29316465/chlorine-levels-and-species-in-fine-and-size-resolved-atmospheric-particles-by-x-ray-absorption-near-edge-structure-spectroscopy-analysis-in-beijing-china
#7
Jie Ouyang, Guo-Sheng Yang, Ling-Ling Ma, Min Luo, Lei Zheng, Qing Huo, Yi-Dong Zhao, Tian-Dou Hu, Zhen-Feng Cai, Dian-Dou Xu
An understanding of the species of chlorine is crucial in the metropolis-Beijing, which is suffering serious haze pollution with high frequency. Particulate Matters (PMs) with five different sizes were collected in Beijing from July 2009 to March 2016, and characterized non-destructively by X-ray absorption near edge structure spectroscopy. PM<0.2, PM0.2-0.5 and PM>2.5 contributed for the major PMs mass in spring and summer, PM0.5-1.0 and PM1.0-2.5 contributed for the major PMs mass in autumn and winter...
December 22, 2017: Chemosphere
https://www.readbyqxmd.com/read/29315025/particulate-matter-emissions-of-different-brands-of-mentholated-cigarettes
#8
Julia Gerharz, Michael H K Bendels, Markus Braun, Doris Klingelhöfer, David A Groneberg, Ruth Mueller
Inhaling particulate matter (PM) in environmental tobacco smoke (ETS) endangers the health of non-smokers. Menthol, an additive in cigarettes, attenuates respiratory irritation of tobacco smoke. It reduces perceptibility of smoke and therefore passive smokers may inhale ETS unnoticed. To investigate a possible effect of menthol on PM concentrations (PM10, PM2.5 and PM1) ETS of four mentholated cigarette brands (Elixyr Menthol, Winston Menthol, Reyno Classic and Pall Mall Menthol Blast) with varying menthol content were analyzed...
January 9, 2018: Journal of the Air & Waste Management Association
https://www.readbyqxmd.com/read/29306141/attapulgite-suspension-mitigates-fine-particulate-matter-pm2-5-emission-from-coal-combustion-in-fluidized-bed
#9
Huichao Chen, Xiaobin Tang, Cai Liang, Xin Wu
To reduce fine particulate matter emission from coal burning sources especially fossil fuel fired energy generation facility is critical to improve air quality. Attapulgite suspension was attempted to spray in a 6 kW fluidized bed facility and reduce fine particulate matter emission during coal combustion. The key parameters such as attapulgite mass, flowrate and spraying zone were investigated to determine the optimal and critical conditions that influence fine particulate matter emission. Exciting results indicate that both fine particle number and mass concentrations are largely decreased due to the physical/chemical absorption with the suitable mass ratio of 3 wt%...
January 3, 2018: Journal of Environmental Management
https://www.readbyqxmd.com/read/29297052/association-of-long-term-exposure-to-airborne-particulate-matter-of-1-%C3%AE-m-or-less-with-preterm-birth-in-china
#10
Yuan-Yuan Wang, Qin Li, Yuming Guo, Hong Zhou, Xiaobin Wang, Qiaomei Wang, Haiping Shen, Yiping Zhang, Donghai Yan, Ya Zhang, Hongguang Zhang, Shanshan Li, Gongbo Chen, Jun Zhao, Yuan He, Ying Yang, Jihong Xu, Yan Wang, Zuoqi Peng, Hai-Jun Wang, Xu Ma
Importance: Airborne particulate matter pollution has been associated with preterm birth (PTB) in some studies. However, most of these studies assessed only populations living near monitoring stations, and the association of airborne particulate matter having a median diameter of 1 μm or less (PM1) with PTB has not been studied. Objective: To evaluate whether PM1 concentrations are associated with the risk of PTB. Design, Setting, and Participants: This national cohort study used National Free Preconception Health Examination Project data collected in 324 of 344 prefecture-level cities from 30 provinces of mainland China...
January 2, 2018: JAMA Pediatrics
https://www.readbyqxmd.com/read/29280976/a-novel-multi-approach-protocol-for-the-characterization-of-occupational-exposure-to-organic-dust-swine-production-case-study
#11
Carla Viegas, Tiago Faria, Ana Monteiro, Liliana Aranha Caetano, Elisabete Carolino, Anita Quintal Gomes, Susana Viegas
Swine production has been associated with health risks and workers' symptoms. In Portugal, as in other countries, large-scale swine production involves several activities in the swine environment that require direct intervention, increasing workers' exposure to organic dust. This study describes an updated protocol for the assessment of occupational exposure to organic dust, to unveil an accurate scenario regarding occupational and environmental risks for workers' health. The particle size distribution was characterized regarding mass concentration in five different size ranges (PM0...
December 27, 2017: Toxics
https://www.readbyqxmd.com/read/29273920/particulate-matter-concentration-levels-during-intense-haze-event-in-an-urban-environment
#12
Jamiu Adetayo Adeniran, Adeniyi Saheed Aremu, Yusuf Olatunji Saadu, Rafiu Olasunkanmi Yusuf
This study assessed concentration levels of particulate matter (PM) in the ambient environment of Ilorin metropolis, Nigeria, during haze episodes. Meteorological data (wind speed and direction, rainfall data, sunshine data, relative humidity and temperature) were obtained. Aerocet 531S particle counter (MetOne Instruments, USA) was used to measure four mass concentration ranges of PM (PM1.0, PM2.5, PM10 and the total suspended particles (TSP)) in 10 locations taking into consideration land use patterns. Surfer® version 8 (Golden Software LLC, USA) was used to model the spatial variation of particulate matter concentration levels using kriging interpolation griding method...
December 22, 2017: Environmental Monitoring and Assessment
https://www.readbyqxmd.com/read/29250634/performance-assessment-of-a-portable-nephelometer-for-outdoor-particle-mass-measurement
#13
Zhanyong Wang, Dongsheng Wang, Zhong-Ren Peng, Ming Cai, Qingyan Fu, Dongfang Wang
The availability of portable nephelometers has improved assessment of exposure to atmospheric particles at a high resolution regarding space and time. However, nephelometer performance has seldom been evaluated for outdoor measurements, especially in Chinese cities. During 37 days of measurements at four outdoor sites in Shanghai, we assessed a popular nephelometer called SidePak (TSI Inc., USA) for PM1.0, PM2.5 and PM10 mass measurements and compared them to US federal reference methods (FRMs) based on different measurement principles...
December 18, 2017: Environmental Science. Processes & Impacts
https://www.readbyqxmd.com/read/29248706/gas-particle-partitioning-and-particle-size-distribution-of-pcdd-fs-and-pcbs-in-urban-ambient-air
#14
B Barbas, A de la Torre, P Sanz, I Navarro, B Artíñano, M A Martínez
Urban ambient air samples, including gas-phase (PUF), total suspended particulates (TSP), PM10, PM2.5 and PM1 airborne particle fractions were collected to evaluate gas-particle partitioning and size particle distribution of polychlorinated dibenzo-p-dioxins and dibenzofurans (PCDD/Fs) and polychlorinated biphenyls (PCBs). Clausius-Clapeyron equation, regressions of logKp vs logPL and logKOA, and human respiratory risk assessment were used to evaluate local or long-distance transport sources, gas-particle partitioning sorption mechanisms, and implications for health...
December 14, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/29243147/seasonal-variations-in-size-distribution-water-soluble-ions-and-carbon-content-of-size-segregated-aerosols-over-new-delhi
#15
Pawan Kumar, Sushil Kumar, Sudesh Yadav
Size distribution, water-soluble inorganic ions (WSII), and organic carbon (OC) and elemental carbon (EC) in size-segregated aerosols were investigated during a year-long sampling in 2010 over New Delhi. Among different size fractions of PM10, PM0.95 was the dominant fraction (45%) followed by PM3-7.2 (20%), PM7.2-10 (15%), PM0.95-1.5 (10%), and PM1.5-3 (10%). All size fractions exceeded the ambient air quality standards of India for PM2.5. Annual average mass size distributions of ions were specific to size and ion(s); Ca2+, Mg2+, K+, NO3-, and Cl- followed bimodal distribution while SO42- and NH4+ ions showed one mode in PM0...
December 14, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/29175476/source-apportionment-of-aerosol-particles-at-a-european-air-pollution-hot-spot-using-particle-number-size-distributions-and-chemical-composition
#16
Cecilia Leoni, Petra Pokorná, Jan Hovorka, Mauro Masiol, Jan Topinka, Yongjing Zhao, Kamil Křůmal, Steven Cliff, Pavel Mikuška, Philip K Hopke
Ostrava in the Moravian-Silesian region (Czech Republic) is a European air pollution hot spot for airborne particulate matter (PM), polycyclic aromatic hydrocarbons (PAHs), and ultrafine particles (UFPs). Air pollution source apportionment is essential for implementation of successful abatement strategies. UFPs or nanoparticles of diameter <100 nm exhibit the highest deposition efficiency in human lungs. To permit apportionment of PM sources at the hot-spot including nanoparticles, Positive Matrix Factorization (PMF) was applied to highly time resolved particle number size distributions (NSD, 14 nm-10 μm) and PM0...
November 22, 2017: Environmental Pollution
https://www.readbyqxmd.com/read/29127795/an-investigation-of-the-leaf-retention-capacity-efficiency-and-mechanism-for-atmospheric-particulate-matter-of-five-greening-tree-species-in-beijing-china
#17
Jinqiang Liu, Zhiguo Cao, Songyan Zou, Huanhuan Liu, Xiao Hai, Shihua Wang, Jie Duan, Benye Xi, Guangxuan Yan, Shaowei Zhang, Zhongkui Jia
Urban trees have the potential to reduce air pollution, but the retention capacity and efficiency of different tree species for atmospheric particulate matter (PM) accumulation and the underlying mechanism hasn't been well understood. To select tree species with high air purification abilities, the supplementing ultrasonic cleaning (UC) procedure was first introduced into the conventional leaf cleaning methods [single water cleaning (WC) or plus brush cleaning (BC)] for eluting the leaf-retained PM. Further updates to the methodology were applied to investigate the retention capacity, efficiency, and mechanism for PM of five typical greening tree species in Beijing, China...
November 8, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/29121603/assessment-of-light-extinction-at-a-european-polluted-urban-area-during-wintertime-impact-of-pm1-composition-and-sources
#18
R Vecchi, V Bernardoni, S Valentini, A Piazzalunga, P Fermo, G Valli
In this paper, results from receptor modelling performed on a well-characterised PM1 dataset were combined to chemical light extinction data (bext) with the aim of assessing the impact of different PM1 components and sources on light extinction and visibility at a European polluted urban area. It is noteworthy that, at the state of the art, there are still very few papers estimating the impact of different emission sources on light extinction as we present here, although being among the major environmental challenges at many polluted areas...
November 6, 2017: Environmental Pollution
https://www.readbyqxmd.com/read/29059576/biodegradation-of-sulfamethoxazole-in-bacteria-from-three-different-origins
#19
Sikandar I Mulla, Anyi Hu, Qian Sun, Jiagwei Li, Fidèle Suanon, Muhammad Ashfaq, Chang-Ping Yu
Sulfamethoxazole (SMX) is a common medicine prescribed to treat infections. Due to vast use, SMX has been detected in different parts of the world. Hence, it has become a high risk because of its long term persistence with high biological activity in the ecosystem. Therefore, it is necessary to understand the mechanism of SMX degradation in different genus of bacteria, which is presently unclear. In the present study, degradation of 5 mg L(-1) SMX was studied in three isolated pure bacterial cultures, Ochrobactrum sp...
October 20, 2017: Journal of Environmental Management
https://www.readbyqxmd.com/read/29055838/chemical-composition-and-source-apportionment-of-sub-micron-particles-during-wintertime-over-northern-india-new-insights-on-influence-of-fog-processing
#20
Prashant Rajput, Dharmendra Kumar Singh, Amit Kumar Singh, Tarun Gupta
A comprehensive study was carried out from central part of Indo-Gangetic Plain (IGP; at Kanpur) to understand abundance, temporal variability, processes (secondary formation and fog-processing) and source-apportionment of PM1-bound species (PM1: particulate matter of aerodynamic diameter ≤ 1.0 μm) during wintertime. A total of 50 PM1 samples were collected of which 33 samples represent submicron aerosol characteristics under non-foggy condition whereas 17 samples represent characteristics under thick foggy condition...
October 19, 2017: Environmental Pollution
keyword
keyword
56336
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"