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Photochemical behavior of benzo[a]pyrene on soil surfaces under UV light irradiation

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Journal of Environmental Sciences 2006年第6期18卷 1226-1232页

作者： zhang li-hong li Pei-jun GONG Zong-qiang Oni Adeola A. Institute of Applied Ecology Chinese Academy of Sciences Shenyang 110016 China Graduate University of Chinese Academy of Sciences Beijing 100049 China Department of Environmental Science University of Liaoning Shenyang 110036 China Department of Zoology University of Ibadan Ibadan Nigeria

The rates of photodegradation and photocatalysis of benzo [a]pyrene （BaP） on soil surfaces under UV light have been studied. Different parameters such as temperature, soil particle sizes, and soil depth responsible for photodegradation, catalyst loads and wavelength of UV irradiation blamed for photocatalysis have been monitored. The results obtained indicated that BaP photodegradation follows pseudo-first-order kinetics. BaP photodegradation was the fastest at 30℃ . The rates of BaP photodegradation at different soil particle size followed the order： less than 1 mm〉less than 0.45 mm〉less than 0.25 mm. When the soil depth increased from 1 mm to 4 ram, the half-life increased from 13.23 d to 17.73 d. The additions of TiO2 or Fe2O3 accelerated the photodegradation of BaP, and the photocatalysis of BaP follows pseudo-first-order kinetics. Changes in catalyst loads of TiO2 （0.5%, 1%, 2%, and 3% （wt）） or Fe203 （2%, 5%, 7%, and 10% （wt）） did not significantly affect the degradation rates. Both BaP photocatalysis in the presence of TiO2 and Fe2O3 were the fastest at 254 nm UV irradiation.

关键词： photodegradation photocatalysis benzo[a]pyrene UV-irradiation

Radial solution of the Logarithmic Laplacian system

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Applied Mathematics(A Journal of Chinese Universities) 2024年第1期39卷 114-124页

作者： zhang li-hong NIE Xiao-feng WANG Guo-tao Bashir Ahmad School of Mathematics and Computer Science Shanxi Normal UniversityLinfen 041004China Nonlinear Analysis and Applied Mathematics(NAAM)Research Group Department of MathematicsFaculty of ScienceKing Abdulaziz UniversityJeddah 21589Saudi Arabia.

The paper generalizes the direct method of moving planes to the Logarithmic Laplacian ***,some key ingredients of the method are discussed,for example,Narrow region principle and Decay at ***,the radial symmetry of th... 详细信息

关键词： the Logarithmic Laplacian system radial symmetry the direct method of moving planes

lassification and existence of positive entire k-convex radial solutions for generalized nonlinear k-Hessian system

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Applied Mathematics(A Journal of Chinese Universities) 2021年第4期36卷 564-582页

作者： zhang li-hong YANG Ze-dong WANG Guo-tao Mohammad M.Rashidi School of Mathematics and Computer Science Shanxi Normal UniversityLinfen 041004China Shanghai Automotive Wind Tunnel Center Tongji UniversityShanghai 201804China

In this paper,we consider the following generalized nonlinear k-Hessian system G(S_(k)^(1/k)(λ(D^(2)z1)))S_(k)^(1/k)(λ(D^(2)z1))=φ(|x|,z1,z2),x∈R^(N),G(S_(k)^(1/k)(λ(D^(2)z2)))S_(k)^(1/k)(λ(D^(2)z2))=ψ(|x|,z1,z2),x∈R^(N),where G is a nonlinear operator and Sk(λ(D^(2)z))stands for the k-Hessian *** first are interested in the classification of positive entire k-convex radial solutions for the k-Hessian system ifφ(|x|,z1,z2)=b(|x|)φ(z1,z2)andψ(|x|,z1,z2)=h(|x|)ψ(z1).Moreover,with the help of the monotone iterative method,some new existence results on the positive entire k-convex radial solutions of the k-Hessian system with the special non-linearitiesψ,φare given,which improve and extend many previous works.

关键词： k-Hessian system entire blow-up classification of radial solutions monotone iterative method

Effects of the crude extract of Polygala tenuifolia Willd on human sperm in vitro

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Journal of Zhejiang University-Science B(Biomedicine & Biotechnology) 2011年第6期12卷 448-454页

作者： Yi QIU Lei-guang WANG Yi-fang JIA Dan-tong YANG Mei-hua zhang Yan-ping zhang li-hong zhang ling GAI Key Laboratory for Improving Birth Outcome Technique Shandong Provincial Institute of Science and Technology for Family Planning Jinan 250002 China

The aim of the present study is to analyze sperm membrane changes and the spermicidal effect in treatment with the crude extract from Polygala tenuifo/ia Willd （PTW） in vitro. The root of PTW was extracted in distilled water. Normal human spermatozoa were used to assess the spermicidal activity （Sander-Cramer assay） of the extract from the PTW root. The hypo-osmotic swelling （HOS） test and the eosin Y （EY） staining were used to detect the integrity of sperm membrane and vitality. The sperm chromatin dispersion （SCD） test was performed to determine sperm DNA integrity. N-9 was used as a reference standard and semen added to physiological saline was used as the control. Semen samples were donated by 42 healthy fertile men. The crude extract from the root of PTW could immobilize and kill 100% spermatozoa within 20 s in vitro at the concentrations of 20.0 and 10.0 mg/ml; at the concentration of 5.0 mg/ml, spermatozoa were immobilized in （39.5±3.2） s. In the groups of the crude extract from the root of PTW and N-9 solution the rate of the normal HOS （tails swollen） and the white head （unstained） was 0%, and the rate of the abnormal HOS （tails unswollen） and red head （stained） was 100%. Sperm DNA fragmentation showed no change in exposure to the crude extract from the root of PTW and N-9 solution. The sperm revival test did not show any spermatozoa that recovered their motilities. The rapid spermicidal activity of the crude extract from the root of PTW in vitro may occur by the disruption of the sperm membrane integrity.

关键词： Polygala tenuifofia Willd Crude extract Spermicidal effect in vitro Sperm membrane DNA integrity

Fingerprinting Analysis of Rhizoma Chuanxiong of Commercial Types using ~1H Nuclear Magnetic Resonance Spectroscopy and High Performance liquid Chromatography Method

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Journal of Integrative Plant Biology 2009年第6期51卷 537-544页

作者： Hai-lin Qin An-Jun Deng Guan-Hua Du Peng Wang Jin-Lan zhang Zhi-hong li Institute of Materia Medica Chinese Academy of Medical Sciences Peking Union Medical College Key Laboratory of Bioactive Substances and Resources of Chinese Herbal Medicine Ministry of Education Beijing 100050 China

The ^1 H nuclear magnetic resonance （^1 H NMR） fingerprints of fractionated non-polar extracts （control substance for a plant drug （CSPD） A） from Rhizoma chuanxiong, the rhizomes of ligusticum chuanxiong Hort., of seven specimens from different sources were measured on Fourier Transform （FT）-NMR spectrometer and assigned by comparing them with the ^1 H NMR spectra of the isolated pure compounds. The ^1 H NMR fingerprints showed exclusively characteristic resonance signals of the major special constituents of the plant. Although the differences in the relative intensity of the ^1H NMR signals due to a discrepancy in the ratio of the major constituents among these samples could be confirmed by high performance liquid chromatography analysis, the general features of the ^1H NMR fingerprint established for an authentic sample of the rhizomes of L. chuanxiong e. hibited exclusive data from those special compounds and can be used for authenticating L. Chuanxiong species.

关键词： control substance for a plant drug A ^1 H nuclear magnetic resonance fingerprint high performance liquid chromatography ligusticumchuanxiong phenylpropenoid phthalides.

A 23 GHz high-temperature superconducting microstrip filter for radio astronomy

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Chinese Science Bulletin 2009年第19期54卷 3485-3488页

作者： GAO Lu GUO Jin WANG YueHui YU Tao zhang Qiang li ChunGuang zhang XueQiang li hong li JunJie li WuXia GU ChangZhi MENG JiBao FENG Ji HE YuSheng Beijing National Laboratory for Condensed Matter Physics Institute of Physics Chinese Academy of Sciences Beijing 100190 China

This paper reports a 6-pole high-temperature superconducting (HTS) microstrip bandpass filter for radio astronomy applications. The filter has a center frequency of 23 GHz and a bandwidth the 2 GHz. We have made many efforts, such as adopting 0.25-mm-thick substrate, carefully designing the housing box and filter layout, to solve the problems in realizing a K-band planar filter. A special straight-line half-wavelength resonator (center-widen resonator) was also designed to reduce the insertion loss of the filter. The measured results showed a midband insertion loss of 0.11 dB with a ripple of 0.4 dB, and a return loss better than 11.5 dB. Good agreement was obtained between simulated and measured results.

关键词：微波传输带无线电通信电波天文学超导

Formulation of dried lignans nanosuspension with high redispersibility to enhance stability,dissolution,and oral bioavailability

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Chinese Journal of Natural Medicines 2016年第10期14卷 757-768页

作者： SHEN Gang CHENG ling WANG li-Qiang zhang li-hong SHEN Bao-De liAO Wei-Bo li Juan-Juan ZHENG Juan XU Rong YUAN Hai-Long Department of Pharmacy Air Force General Hospital of PLABeijing 100142China Pharmacy College Chengdu University of Traditional Chinese MedicineChengdu 611137China School of Biomedical Sciences Huaqiao UniversityQuanzhou 362021China

Herpetospermum caudigerum lignans(HTL), one of the potential drugs with anti-hepatitis B virus and hepatoprotective effects, has limited clinical applications because of poor aqueous solubility and low bioavailability. Both herpetrione(HPE) and herpetin(HPN) are the most abundant ingredients in HTL and exhibit weak acidity. The purpose of the present study was to produce dried preparations of HTL(composed of HPE and HPN) nanosuspensions(HTL-NS) with high redispersibility using lyophilization technology. The HTL-NS was prepared by utilizing precipitation-combined homogenization technology based on acid-base neutralization reactions, and critical formulation and process parameters affecting the characteristics of HTL-NS were optimized. The resultant products were characterized by particle size analysis, SEM, XRD, stability, solubility, dissolution and in vivo bioavailability. HTL-NS showed near-spherical-shaped morphology and the size was 243 nm with a narrow PDI value of 0.187. The dried preparations with a relatively large particle size of 286 nm and a PDI of 0.215 were achieved by using 4%(W/V) mannitol as cryoprotectants, and had a better stability at 4 or 25 oC for 2 months, compared to HTL-NS. In the in vitro test, the dried preparations showed markedly increased solubility and dissolution velocity. Besides, in the in vivo evaluation, it exhibited significant increases in AUC0–t, C_(max), MRT and a decrease in T_(max), compared to the raw drug.. In conclusion, our results provide a basis for the development of a drug delivery system for poorly water-soluble ingredients with p H-dependent solubility.

关键词： Herpetospermum caudigerum lignans Nanosuspensions Acid-base neutralization Saturation solubility Dissolution Oral bioavailability

IP Network Management Model Based on NGOSS

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The Journal of China Universities of Posts and Telecommunications 2004年第Z1期11卷 107-111页

作者： zhang Jin-yu li hong-hui liU Feng School of Computer & Information Technology Beijing Jiaotong University Beijing 100044 P.R. China School of Computer & Information Technology Beijing Jiaotong University Beijing 100044 P.R. China School of Computer & Information Technology Beijing Jiaotong University Beijing 100044 P.R. China

This paper addresses a management model for IP network based on Next Generation Operation Support System (NGOSS). It makes the network management on the base of all the operation actions of ISP, It provides QoS to user service through the whole path by providing end-to-end Service Level Agreements (SLA) management through whole path. Based on web and coordination technology, this paper gives an implement architecture of this model.

关键词： IP QoS network management NGOSS

Adipocytokine Gene SNPs and Type 2 Diabetes in Mongolians:A Gene-Gene and Gene-Environment Interaction Study

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Biomedical and Environmental Sciences 2023年第12期36卷 1183-1188页

作者： li Na zhang li hong GAO Yu Min li Hai ling li Wu Yun Ta Na PANG Hui ZHAO Yan Ping ZHENG Hai Fang DONG Jia Hui ZHAO ling Yan School of Public Health Inner Mongolia Medical UniversityHohhot 010000Inner MongoliaChina Department of Critical Care Medicine Ordos Central HospitalOrdos 017000Inner MongoliaChina Laboratory for Molecular Epidemiology in Chronic Diseases Inner Mongolia Medical UniversityHohhot 010000Inner MongoliaChina Affiliated Hospital of Inner Mongolia Medical University Hohhot 010oooInner MongoliaChina

The International Diabetes Federation's most recent data indicates that the prevalence of diabetes worldwide is projected to rise to 12.2%by 2025,with783 million people affected^([1]).The prevalence of diabetes in China has risen from 9.3%in 2011 to13.04%in 2021^([1]).A cross-sectional study in China showed that the prevalence of diabetes among Tibetans was 6.5%and it was 6.3%among the Hui people in 2018,while the incidence of diabetes in the Inner Mongolia Autonomous Region was as high as 19.9%,ranking first in the country^([2]).The Mongolian population has a diet structured around meat and milk,supplemented by pasta,rice and vegetables,and foods such as homemade yogurt and bacon are often *** a unique diet may have contributed to a high incidence of diabetes among the Mongolian people.

关键词： Diabetes prevalence cytokine