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| 1 | Evolution of planetary boundary layer under different weather conditions,and its impact on aerosol concentrations显示文摘一个领域实验在天津被进行,从 2010 年 9 月 930 日的中国,在表面空气污染物质上集中了于行星的边界层(PBL ) 和它的影响的进化。实验使用了三台遥感仪器,风侧面雷达( WPR ),微波辐射计( MWR )和微脉搏的激光雷达( MPL ),到检测风,温度,和喷雾器 backscattering 系数并且到的垂直侧面测量表面污染物质的垂直侧面(喷雾器,公司, SO2 , NOx ),并且也从 255-m 收集了声音的风速表数据气象学的塔。把大小基于这些, PBL 的进化被估计。平均 PBL 高度在夜间期间在 noon/afternoon-time,和 200300 m 期间是大约 10001300 m。PBL 高度和喷雾器集中是相关反的在期间清楚并且薄雾条件。当平均喷雾器集中分别地是在薄雾和晴朗天空条件下面的 52 和 17 g/m3 时,平均最大的 PBL 高度是 1.08 和 1.70 km。太阳的放射上的喷雾器和云的影响基于从 255-m 收集的声音的风速表数据被观察气象学的塔。当 PBL 的镇压结构进一步削弱了污染物质的散开时,热流动被发现被薄雾(重污染) 或云显著地减少了,它趋于压抑 PBL 的发展,导致重污染。这个可能的积极反馈周期(更多的喷雾器降低 PBL 高度更多的喷雾器) 将在大城市为重地面污染导致一个加速过程。 | Jiannong Quan Yang Gao Qiang Zhang Xuexi Tie Junji Cao Suqin Han Junwang Meng Pengfei Chen Delong Zhao | 2013 | Particuology2013，11，1： | 51 |
| 2 | Characterization and Source Apportionment of Volatile Organic Compounds in Urban and Suburban Tianjin, China显示文摘Tianjin is the third largest megacity and the fastest growth area in China, and consequently faces the problems of surface ozone and haze episodes. This study measures and characterizes volatile organic compounds(VOCs), which are ozone precursors, to identify their possible sources and evaluate their contribution to ozone formation in urban and suburban Tianjin,China during the Ha Chi(Haze in China) summer campaign in 2009. A total of 107 species of ambient VOCs were detected,and the average concentrations of VOCs at urban and suburban sites were 92 and 174 ppbv, respectively. Of those, 51 species of VOCs were extracted to analyze the possible VOC sources using positive matrix factorization. The identified sources of VOCs were significantly related to vehicular activities, which specifically contributed 60% to urban and 42% to suburban VOCs loadings in Tianjin. Industrial emission was the second most prominent source of ambient VOCs in both urban and suburban areas, although the contribution of industry in the suburban area(36%) was much higher than that at the urban area(16%). We conclude that controlling vehicle emissions should be a top priority for VOC reduction, and that fast industrialization and urbanization causes air pollution to be more complex due to the combined emission of VOCs from industry and daily life, especially in suburban areas. | HAN Meng LU Xueqiang ZHAO Chunsheng RAN Liang HAN Suqin | 2015 | Advances in Atmospheric Sciences2015，32，3： | 16 |
| 3 | Long-term trends in fog and boundary layer characteristics in Tianjin,China显示文摘Long-term trends in fog episodes,vertical variations of atmospheric boundary structure,and air pollutant concentrations during two different heavy fog events in the Tianjin area were analyzed.The total amount of fog has increased since 1980 due to the stability of the boundary layer and an increase of pollutant emissions.The variation in the characteristics of the boundary layer and air pollutant concentrations were significantly different between the two fog processes(fog 1 and fog II).The onset of fog I was accompanied by a temperature inversion in the low atmosphere,and the average kinetic energy showed a clear diurnal trend and vertical variation,which increased with height.The dissipation of fog I was mainly due to turbulence.However,the atmospheric stratification was not stable in the lower layer before the onset of fog II.The diurnal and vertical changes in kinetic energy were very small,in which turbulent momentum at each measurement height tended to be zero.In the dissipation process of fog II,wind speed increased significantly.Surface PM_(2.)5 concentrations decreased,but the ratio of PM_(2.5) to PM_(10)increased from 0.66 to 0.82 until fog I dissipated.However,the concentration of PM2.5 did not decrease at the early stage of fog II,but the ratio of PM_(2.5) to PM_(10) PM_(2.5)/PM_(10) decreased to 0.21 when fog II dissipated.This study showed that there was a clear difference in the evolution of pollutant concentration for different pollutants and in different developing stages during the fog events.PM2.5 concentration accumulated faster than those of SO_2 and NO_x,and the PM_(2.5) cumulative rate was greater in the mid-term of the fog process. | Suqin Han Ziying Cai Yufen Zhang Jiao Wang Qing Yao Peiyan Li Xiangjin Li | 2015 | Particuology2015，13，3： | 7 |
| 4 | Vertical characteristics and source identification of PM_(10) in Tianjin显示文摘Ambient PM 10 (particulate matter with a diameter less than 10μm) concentrations were measured on a 255 meter tower in Tianjin,China.The samples were collected at four vertical levels (10,40,120 and 220 m).Vertical characteristics for PM 10 samples were studied.The results showed that the concentrations of PM 10 and constituent species had a negative correlation with the sampling height.The highest concentrations of PM 10 and species were obtained at the 10 m level,and the lowest concentrations were measured at the 220 m level.For the fractions of species to total mass,SO 4 2- and NO 3- had higher values (fraction) at greater height;while Ca had a higher fraction at lower height.Possible source categories for the PM 10 ambient dataset were identified by the principal component analysis method.The possible source categories included crustal dust,vehicles,cement dust,and incineration as well as secondary sulfate and nitrate sources.Analysis of meteorological factors on PM 10 concentrations indicated that wind speed and inversion may be the main factors contributing to different concentrations of PM 10 at different heights. | Zhimei Xiao Jianhui Wu Suqin Han Yufen Zhang Hong Xu Xiaoyong Zhang Guoliang Shi Yinchang Feng | 2012 | Journal of Environmental Sciences2012，24，1： | 5 |
| 5 | Impact of meteorological condition changes on air quality and particulate chemical composition during the COVID-19 lockdown显示文摘Stringent quarantine measures during the Coronavirus Disease 2019(COVID-19)lockdown period(January 23,2020 to March 15,2020)have resulted in a distinct decrease in anthropogenic source emissions in North China Plain compared to the paralleled period of 2019.Particularly,22.7%decrease in NO_(2)and 3.0%increase of O_(3)was observed in Tianjin,nonlinear relationship between O_(3)generation and NO_(2)implied that synergetic control of NOx and VOCs is needed.Deteriorating meteorological condition during the COVID-19 lockdown obscured the actual PM2.5 reduction.Fireworks transport in 2020 Spring Festival(SF)triggered regional haze pollution.PM2.5 during the COVID-19 lockdown only reduced by 5.6%in Tianjin.Here we used the dispersion coefficient to normalize the measured PM2.5(DN-PM2.5),aiming to eliminate the adverse meteorological impact and roughly estimate the actual PM2.5 reduction,which reduced by 17.7%during the COVID-19 lockdown.In terms of PM2.5 chemical composition,significant NO_(3)−increase was observed during the COVID-19 lockdown.However,as a tracer of atmospheric oxidation capacity,odd oxygen(Ox=NO_(2)+O_(3))was observed to reduce during the COVID-19 lockdown,whereas relative humidity(RH),specific humidity and aerosol liquid water content(ALWC)were observed with noticeable enhancement.Nitrogen oxidation rate(NOR)was observed to increase at higher specific humidity and ALWC,especially in the haze episode occurred during 2020SF,high air humidity and obvious nitrate generation was observed.Anomalously enhanced air humidity may response for the nitrate increase during the COVID-19 lockdown period. | Jing Ding Qili Dai Yafei Li Suqin Han Yufen Zhang Yinchang Feng | 2021 | Journal of Environmental Sciences2021，33，11： | 2 |
| 6 | Terpolymerization of carbon dioxide with propylene oxide and e-caprolactone: synthesis, characterization and biodegradability显示文摘 | LIU Suqin XIAO Han HUANG Kelong | 2006 | Polymer Bulletin2006，56，： | 1 |
| 7 | 人参皂甙Rg3对人喉鳞癌Hep-2细胞分泌性VEGF的影响(英文)显示文摘Objective: The aim of this study was to investigate the affecting of Rg3 to secreted VEGF of human laryngeal carcinoma Hep-2 cells and its mechanism of inhibition to tumor angiogenesis. Methods: Cultured human laryngeal cancer cell line Hep-2 and human vascular endothelial cells in vitro, cells got into the period of exponential phase of growth, was diviced into 3 groups: group I(control group), group II(DDP group), group III(Rg3 group). Added to the Hep-2 cells Rg3 and DDP, made Rg3 final concentration was 300 μg/mL, and DDP was 3 μg/mL. 48 h later, specimens from sample to be done immunocytochemistry, and the protein of VEGF in Hep-2 cells to be detected. Collecting Hep-2 cells supernatant, some was used to measure the protein level of VEGF in Hep-2 cells supernatant by ELISA. Some was used to culture HVEC. 24 h later,cell growth inhibition rate of human vascular endothelial was determined by MTT. Results: The protein level of VEGF was evidently higher in group I compared to group II and group III, it was not only in Hep-2 cells, but also in supernatant of Hep-2 cells.There was no significantly different between group II and group III. MTT results showed that, the human vascular endothelial cell growth inhibition rate of group I was significantly lower than that of group II and group III(P < 0.05). At the same time the HVEC growth inhibition rate of group II was significantly lower than that of group III(P < 0.05). Conclusion: The inhibition to tumor angiogenesis of Rg3 is stronger than traditional chemotherapy drug cisplatin. It worke by reducing the biological effects of secreted VEGF, But the effecting worke by reducing the activity of secreted VEGF itself or affecting endothelial function of VEGF receptor or some other ways to be further studied. | Jihua Zhang Lai Wang Caili Han Dongmei Song Baoshan Wang Suqin Shi Sha Liu | 2013 | The Chinese-German Journal of Clinical Oncology2013，12，10： | 1 |
| 8 | Impact of nocturnal planetary boundary layer on air pollutants: measurements from a 250 meter tower over Tianjin, China显示文摘 | Han Suqin Bian Hai Tie Xuexi | 2006 | J Hazard Mater2006，162，： | 1 |
| 9 | Vertical characteristics of levels and potential sources of water-soluble ions in PM10in a Chinese megacity显示文摘 | Tian Yingze Shi Guoliang Han Suqin | 2013 | Science of the Total Environment2013，447，： | 1 |
| 10 | On-line chemiluminescence determination protocatechuie aldehyde and protocatechuic acid in pharmaceutical preparations by capillary electrophoresis显示文摘 | HAN Suqin LIU Erbao LI Hua | 2005 | J Pharm Bio Anal2005，37，： | 1 |
| 11 | On-line chemiluminescence determination protocatechuic aldehyde and protocatechuic acid in pharmaceutical preparations by capillary electrophoresis显示文摘 | Suqin Han Erbao Liu Hua Li | 2004 | Journal of Pharmaceutical and Biomedical Analysis2004，，4： | 1 |
| 12 | Impact of nocturnal planetary boundary layer on urban air pollutants measure- ments from a 250 meter tower over Tianjin,China显示文摘 | HAN Suqin BIAN Hal TIE Xuexi | 2008 | Journal Hazard Mater2008，162，1： | 1 |
| 13 | Vertical characteristics of carbonaceous species and their source contributions in a Chinese mega city显示文摘 | SHI Guoliang TIAN Yingze HAN Suqin | 2012 | Atmos Environ2012，60，： | 1 |
| 14 | Study of vertical distributive characters of O3 in autumn with 255m meteorological tower in tianjin, china显示文摘 | HAN Suqin Liu Aixia Bian Hai | 2007 | Abstracts of papers of American Chemical Society2007，，： | 1 |
| 15 | Impacts of meteorology and precursor emission change on O_(3) variation in Tianjin, China from 2015 to 2021显示文摘Deterioration of surface ozone (O_(3)) pollution in Northern China over the past few years received much attention.For many cities,it is still under debate whether the trend of surface O_(3)variation is driven by meteorology or the change in precursors emissions.In this work,a time series decomposition method (Seasonal-Trend decomposition procedure based on Loess (STL)) and random forest (RF) algorithm were utilized to quantify the meteorological impacts on the recorded O_(3)trend and identify the key meteorological factors affecting O_(3)pollution in Tianjin,the biggest coastal port city in Northern China.After “removing” the meteorological fluctuations from the observed O_(3)time series,we found that variation of O_(3)in Tianjin was largely driven by the changes in precursors emissions.The meteorology was unfavorable for O_(3)pollution in period of 2015-2016,and turned out to be favorable during 2017-2021.Specifically,meteorology contributed 9.3μg/m^(3)O_(3)(13%) in 2019,together with the increase in precursors emissions,making 2019 to be the worst year of O_(3)pollution since 2015.Since then,the favorable effects of meteorology on O_(3)pollution tended to be weaker.Temperature was the most important factor affecting O_(3)level,followed by air humidity in O_(3)pollution season.In the midday of summer days,O_(3)pollution frequently exceeded the standard level (>160μg/m^(3)) at a combined condition with relative humidity in 40%-50%and temperature>31℃.Both the temperature and the dryness of the atmosphere need to be subtly considered for summer O_(3)forecasting. | Jing Ding Qili Dai Wenyan Fan Miaomiao Lu Yufen Zhang Suqin Han Yinchang Feng | 2023 | Journal of Environmental Sciences2023，，4： | 1 |
| 16 | Effect of aerosols onvisibility and radiation in spring 2009 in Tianjin, China 显示文摘 | HAN Suqin BIAN Hai ZHANG Yufeng | 2012 | Aerosol and Air Quality Research2012，12，： | 1 |
| 17 | Analysis of the relationship between 03, NO and NO2 in Tianjin, China 显示文摘 | HAN Suqin BIAN Hai FENG Yinchang | 2011 | Aerosol and Air Quality Research2011，11，2： | 1 |
| 18 | Evidence of impact of aerosols on surface ozone concentration in Tianjin, China 显示文摘 | BIAN Hai HAN Suqin TIE Xuexi | 2007 | Atmos Environ2007，41，22： | 1 |
| 19 | Impact of nocturnal planetary boundary layer on urban air pollutants: measurements from a 250 m tower over Tianjin, China显示文摘 | HAN Suqin BIAN Hai TIE Xuexi | 2009 | J Hazard Mater2009，162，1： | 1 |
| 20 | Impact of Cold Spells on Ischemic Stroke Severity and Clinical Outcomes in Tianjin, China显示文摘There are several studies on the impact of extreme weather on the incidence and mortality of stroke, but the research on the effect of extreme weather events on severity and outcome of ischemic stroke is scarce. This study aimed to evaluate the impact of cold spells on the severity and clinical outcomes of patients with initial acute ischemic stroke in a hospital-based study. We enrolled 553 patients with initial ischemic stroke during the cold seasons between 2016 and 2019. Patients were separated into the mild stroke group and moderate-to-severe stroke group according to the National Institutes of Health Stroke Scale(NIHSS) of the U.S., and good outcome group and poor outcome group according to modified Rankin Scale(mRS) scores. There are nine different definitions of cold spells according to intensities and duration time. After adjustment for climate factors, air quality index, and common risk factors, it is found that cold spells were associated with moderate-to-severe neurological deficits and clinical outcomes in overall ischemic stroke patients. Furthermore, the delay effect for stroke severity started at the beginning of the cold wave(Lag 0) and lasted up to 14 days(Lags 0–14). In addition, when a cold spell was set as a daily mean temperature < 3rd or 5th percentile and with a duration ≥ 2 or 3 consecutive days, cold spells had a significant impact on clinical outcomes, and there was a definite delay effect of at least 7 days(Lags 0–7) and it lasted up to 14days(Lags 0–14). At last, we concluded that cold spells may be a contributory factor for more severe neurological deficits and worse outcomes in patients with initial ischemic stroke. | Juanjuan XUE Chanjuan WEI Xiaoshuang XIA Xuemei QI Yumeng GU Zhongyan WANG Suqin HAN Lin WANG Xin LI | 2023 | Journal of Meteorological Research2023，37，4： | 0 |
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