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Occurrence and distribution of hexabromocyclododecane in sediments from seven major river drainage basins in China

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Journal of Environmental Sciences 2013年第1期25卷 69-76页

作者： honghua li Hongtao Shang Pu Wang Yawei Wang Haidong Zhang Qinghua Zhang Guibin Jiang State Key Laboratory of Environmental Chemistry and Ecotoxicology Research Center for Eco-Environmental SciencesChinese Academy of Sciences

The concentrations and geographical distribution of hexabromocyclododecane （HBCD） were investigated in 37 composite surface sediments from seven major river drainage basins in China, including Yangtze River, Yellow River, Pearl River, liaohe River, Haihe River, Tarim River and Ertix River. The detection frequency of HBCD was 54%, with the concentrations ranged from below limit of detection （LOD） to 206 ng/g dry weight. In general, the geographical distribution showed increasing trends from the upper reaches to the lower reaches of the rivers and from North China to Southeast China. Compared to other regions in the world, the average concentration of HBCD in sediments from Yangtze River drainage basin was at relatively high level, whereas those from other six river drainage basins were at lower or similar level. The highest HBCD concentration in sediment from Yangtze River Delta and the highest detection frequency of t-IBCD in Pearl River drainage basins suggested that the industrial and urban activities could evidently affect the HBCD distribution. HBCD diastereoisomer profiles showed that y-HBCD dominated in most of the sediment samples, followed by ct- and [3-HBCD, which was consistent with those in the commercial HBCD mixtures. Further risk assessment reflected that the average inventories of HBCD were 18.3, 5.87, 3.92, 2.50, 1.77 ng/cm2 in sediments from Pearl River, Haihe River, Tarim River, Yellow River and Yangtze River, respectively.

关键词： HBCD surface sediment Chinese river drainage basin distribution

Variation of airborne quartz in air of Beijing during the Asia-Pacific Economic Cooperation Economic Leaders' Meeting

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Journal of Environmental Sciences 2016年第1期28卷 62-68页

作者： Gang li Yingming li Hongxing Zhang honghua li Guanjun Gao Qian Zhou Yuan Gao Wenjuan li Huizhong Sun Xiaoke Wang Qinghua Zhang State Key Laboratory of Environmental Chemistry and Ecotoxicology Research Center for Eco-Environmental Sciences Chinese Academy of Sciences Beijing Urban Ecosystem Research Station Research Center for Eco-Environmental Sciences Chinese Academy of Sciences Institute of Environment and Health Jianghan University

Quartz particles are a toxic component of airborne paniculate matter（PM）.Quartz concentrations were analyzed by X-ray diffraction in eighty-seven airborne PM samples collected from three locations in Beijing before,during,and after the Asia-Pacific Economic Cooperation（APEC） Leaders＇ Meeting in *** results showed that the mean concentrations of quartz in PM samples from the two urban sites were considerably higher than those from the rural *** quartz concentrations in samples collected after the APEC meeting,when the pollution restriction lever was lifted,were higher than those in the samples collected before or during the APEC *** quartz concentrations ranged from 0.97 to 13.2 μg/m^3,which were among the highest values amid those reported from other *** highest quartz concentration exceeded the Californian Office of Environmental Health Hazard Assessment reference exposure level and was close to the occupational threshold limit values for occupational ***,a correlation analysis showed that quartz concentrations were positively correlated with concentrations of pollution parameters PM10,PM2.5,SO2 and NOx,but were negatively correlated with O3 *** results suggest that the airborne quartz particles may potentially pose health risks to the general population of Beijing.

关键词： Air pollution Carcinogen Haze PM10 Quartz

Epidemiology, resistant pathogens, and causes of early death in cases of bloodstream infection in patients with hematological malignancies from 2012-2019

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Infectious Medicine 2022年第1期1卷 23-30页

作者： Meng li Mingmei Du honghua li Daihong liu Yunxi liu Department of Hematology Chinese PLA general hospitalBeijingChina Department of Disease Prevention and Control Chinese PLA general hospitalBeijingChina

Purpose:To investigate the epidemiology,causative pathogen antibiotic susceptibility,and mortality risk factors of bloodstream infection(BSI)in patients with hematological malignancies(HMs).Methods:Single-center retrospective analysis of BSI cases in patients with HMs in a Chinese tertiary hospital from ***:Among 17,796 analyzed admissions,508 BSI episodes(2.9%;95%confidence interval:2.6%-3.2%)were *** 522 resulting isolates,326(62.5%)were Gram-negative,173(33.1%)were *** BSI incidence among patients with different HMs(severe aplastic anemia:6.7%;acute leukemia:6.2%;myelodysplastic syndrome:3.2%;multiple myeloma:1.3%;and lymphoma:1.0%)differed significantly(pli(30.7%,160/522)was the most common pathogen,followed by Coagulase-negative staphylococci(19.4%,101/522)and Klebsiella pneumoniae(10.0%,52/522).,The rates of imipenem resistance for ***,***,Pseudomonas aeruginosa,and Acinetobacter baumannii were 6.4%,15.0%,27.8%,and 79.0%,*** the Gram-positive pathogens were linezolid *** vancomycin-resistant Enterococcus species were *** overall 14-day mortality was 9.8%(95%confidence interval:7.2%-12.4%).A multivariate analysis showed that HM subtype severe aplastic anemia,***,and malignancy non-remission were independent 14-day mortality risk ***:Gram-negative bacteria were the most common pathogens,with *** as the predominant strain,causing BSIs in HM patients.A carbapenem-resistant *** with a high mortality rate in HM patients made empirical antimicrobial choice a highly challenging issue.

关键词： Bloodstream infection Hematological malignancy Epidemiology

Determination of PCDD/Fs and dioxin-like PCBs in food and feed using gas chromatography-triple quadrupole mass spectrometry

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Science China Chemistry 2017年第5期60卷 670-677页

作者： Huizhong Sun Pu Wang honghua li Yingming li Shucheng Zheng Julius Matsiko Yanfen Hao Weiwei Zhang Dou Wang Qinghua Zhang State Key Laboratory of Environmental Chemistry and Ecotoxicology Research Center for Eco-Environmental Sciences Chinese Academy of Sciences Beijing 100085 China University of Chinese Academy of Sciences Beijing 100049 China Institute of Environment and Health Jianghan University Wuhan 430056 China

A method was developed on a gas chromatograph coupled to a triple quadrupole mass spectrometer(GC-MS/MS) for trace level determination of polychlorinated dibenzo-p-dioxins/dibenzofurans(PCDD/Fs) and dioxin-like polychlorinated biphenyls(DL-PCBs) in food and feed. The results demonstrated good sensitivity and repeatability for PCDD/Fs and DL-PCBs at an extremely low level(10 pg mL^(-1) for 2,3,7,8-TCDD/F), as well as wide linear response of over 3 or 4 orders of magnitude in concentration ranges; 0.5–200 ng mL^(-1) for PeCDD/F and 0.2–2000 ng mL^(-1) for DL-PCBs. The method detection limits for PCDD/Fs and DL-PCBs were in the range from 0.018–0.17 pg g^(-1) to 0.13–0.36 pg g^(-1), respectively. The performance of the GC-MS/MS for food and feed sample analysis showed high precision and accuracy compared to the high resolution gas chromatograph/high resolution mass spectrometer. The results indicated the feasibility of GC-MS/MS as a confirmatory method for the measurement of PCDD/Fs and DL-PCBs in food and feed as required by European Union legislation.

关键词： PCDD/Fs DL-PCBs food feed GC-MS/MS

Architect Wu liangyong

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China Today 1996年第8期45卷 18-20页

作者： REN JIANMIN & li honghua

ＡｒｃｈｉｔｅｃｔＷｕＬｉａｎｇｙｏｎｇＢｙＲＥＮＪＩＡＮＭＩＮ＆ＬＩＨＯＮＧＨＵＡＰｒｏｆｅｓｓｏｒＷｕＬｉａｎｇｙｏｎｇ．ＬｉｊｉｎＷＵＬＩＡＮＧＹＯＮＧｈａｓｄｅｖｏｔｅｄｈｉｓｌｉｆｅｔｏａｒｃｈｉｔｅｃｔｕ...

ＡｒｃｈｉｔｅｃｔＷｕＬｉａｎｇｙｏｎｇＢｙＲＥＮＪＩＡＮＭＩＮ＆ＬＩＨＯＮＧＨＵＡＰｒｏｆｅｓｓｏｒＷｕＬｉａｎｇｙｏｎｇ．ＬｉｊｉｎＷＵＬＩＡＮＧＹＯＮＧｈａｓｄｅｖｏｔｅｄｈｉｓｌｉｆｅｔｏａｒｃｈｉｔｅｃｔｕｒａｌｄｅｓｉｇｎ．Ｉｎｒｅｃｅｎ...

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含铝废液制备超细硅酸铝

化工学报 2007年第2期58卷 514-517页

作者：李洪花李辽沙安徽工业大学安徽省冶金工程与资源综合利用重点实验室安徽马鞍山243002

Ultra-fine aluminum silicate is synthesized from aluminum sulfate and sodium silicate *** consumes aluminum containing chemicals with a high ***, a new method that used aluminum bearing waste liquid as raw material was developed. The new method consisted of reaction, polymerization, surface modification, aging,and ***, the properties of the product were studied with compositional analysis, infrared spectroscopy, SEM, *** results showed that the diameter of primary particles of the product was about 10～40 nm, and the mean diameter was 100nm for the secondary particles.A kind of 3-D network with Si—O and Al—O bonds built up its amorphous non-crystalline *** product was up to the current enterprise standard of *** chemical formula was Na2O · Al2O 3 ·mSiO 2 ·nH2O（m=9—11, n=4—6）.

关键词：含铝废液超细硅酸铝制备冶金渣

Cultured human embryonic neocortical cells survive and grow in infarcted cavities of adult rat brains and interconnect with host brain

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Chinese Medical Journal 2005年第4期118卷 275-280页

作者： ZENGJin-sheng YUJian CUIChun-mei ZHAOZhan honghua SHENGWen-li TAOYu-qian liling HUANGRu-xun StrokeCenter DepartmentofNeurologyFirstUniversityHospitalSunYat-SenUniversityGuangzhou510080China

Background There are no reports on exnografting cultured human fetal neocortical cells in this infracted cavities of adult rat brains. This study was undertaken to observe whether cultured human cortical neurons and astrocytes can survive and grow in the infarcted cavities of adult rat brains and whether they interconnect with host brains. Methods The right middle cerebral artery was ligated distal to the striatal branches in 16 adult stroke-prone renovascular hypertensive rats. One week later, cultured cells from human embryonic cerebral cortexes were stereotaxically transferred to the infarcted cavity of 11 rats. The other 5 rats receiving sham transplants served as controls. For immunosuppression, all transplanted rats received intraperitoneal injection of cyclosporine A daily starting on the day of grafting. Immunohistochemistry for glial fibrillary acidic protein ( GFAP), synaptophysin, neurofilament, and microtubule associated protein-2 ( MAP-2) was performed on brain sections perfused in situ 8 weeks after transplantation. Results Grafts in the infarcted cavities of 6 of 10 surviving rats consisted of bands of neurons with an immature appearance, bundles of fibers, and GFAP-immunopositive astrocytes, which were unevenly distributed. The grafts were rich in synaptophysin, neurofilament, and MAP2-positive neurons with long processes. The graft/host border was diffuse with dendrites apparently bridging over to the host brain, into which neurofilament immunopositive fibers protruded. Conclusion Cultured human fetal brain cells inummodepressed rats and integrate with the host brain.

关键词： cerebral infarction exnograft human rats

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蛋白质三维结构预测问题的求解方法

华中科技大学学报（自然科学版） 2007年第9期35卷 98-100页

作者：许如初李红华华中科技大学计算机科学与技术学院湖北武汉430074

对蛋白质结构预测问题进行了描述,根据蛋白质结构预测问题在三维欧氏空间的连续模型,通过拟物策略找到了相应的数学模型.由于引入了弹性势能和嵌入势能,将一个有约束的问题转化为一个无约束的问题,并在梯度下降法求解的基础上,设计出一... 详细信息

对蛋白质结构预测问题进行了描述,根据蛋白质结构预测问题在三维欧氏空间的连续模型,通过拟物策略找到了相应的数学模型.由于引入了弹性势能和嵌入势能,将一个有约束的问题转化为一个无约束的问题,并在梯度下降法求解的基础上,设计出一种变步长梯度下降的求解方法.通过实例检测,变步长梯度下降法比梯度下降法大大节省了计算时间,且所得结果的能量比梯度下降法所得结果的能量更低.

关键词：蛋白质结构预测拟物算法折叠弹性势能嵌入势能

革命救亡语境中的大学想象:论抗战时期的大学叙事

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西南大学学报（社会科学版） 2020年第4期46卷 131-139,195页

作者：李洪华南昌大学中文系江西南昌330031

抗战时期大学叙事在动荡不安的特殊历史语境中取得了长足发展,大学成为现代作家笔下重要的审美对象和独特的叙事空间。在革命救亡语境中,不同身份背景、人生阅历和个性气质的创作主体,以不同叙事立场和心态,展开了不同视域中的大学想象... 详细信息

抗战时期大学叙事在动荡不安的特殊历史语境中取得了长足发展,大学成为现代作家笔下重要的审美对象和独特的叙事空间。在革命救亡语境中,不同身份背景、人生阅历和个性气质的创作主体,以不同叙事立场和心态,展开了不同视域中的大学想象。茅盾、阳翰笙、巴金、齐同、司马文森等革命进步作家,主要从政治视域反映革命救亡年代校园内外的各种学生运动、大学人物的政治倾向和人生抉择,表现出浓郁的政治化色彩。沈从文、王西彦、张爱玲、老舍、郁达夫、钱锺书、鹿桥、万迪鹤等自由主义作家,则主要从生命与人性或大学本体视域描写民族乱离时期的大学生态与知识分子日常生活、人格心理和精神风貌,呈现出人性化或本体化特征。抗战时期革命救亡语境中的大学叙事,通过对大学日常生活、知识活动和校园风物的文学想象,在革命救亡的宏大主题之外,生动呈现了风格不同的大学形象,具有独特的审美价值和文化意义。

关键词：革命救亡大学想象叙事视域大学形象大学本体