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Photo-induced transformations of Hg(Ⅱ) species in the presence of Nitzschia hantzschiana,ferric ion,and humic acid

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Journal of Environmental Sciences 2010年第1期22卷 76-83页

作者： lin deng Nansheng deng Liwei Mou Fangtong Zhu Department of Municipal Engineering Southeast University Nanjing 210096 China School of Resources and Environmental Science Wuhan University Wuhan 430072 China

Effects of algae Nitzschia hantzschiana, Fe（Ⅲ） ions, humic acid, and pH on the photochemical reduction of Hg（Ⅱ） using the irradiation of metal halide lamps （λ〉 365 nm, 250 W） were investigated. The photoreduction rate of Hg（Ⅱ） was found to increase with increasing concentrations of algae, Fe（Ⅲ） ions, and humic acid. Alteration of pH value affected the photoreduction of Hg（Ⅱ） in aqueous solution with or without algae. The photoreduction rate of Hg（Ⅱ） decreased with increasing initial Hg（Ⅱ） concentration in aqueous solution in the presence of algae. The photochemical kinetics of initial Hg（Ⅱ） and algae concentrations on the photoreduction of Hg（Ⅱ） were studied at pH 7.0. The study on the total Hg mass balance in terms of photochemical process revealed that more than 42% of Hg（Ⅱ） from the algal suspension was reduced to volatile metallic Hg under the conditions investigated.

关键词： photoreduction Nitzschia hantzschiana Hg(Ⅱ) Fe(Ⅲ) humic acid

On the stochastic dynamics of molecular conformation

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Journal of Zhejiang University-Science A(Applied Physics & Engineering) 2007年第9期8卷 1401-1407页

作者： deng Mao-lin ZHU Wei-qiu Department of Mechanics State Key Laboratory of Fluid Power Transmission and Control Zhejiang University Hangzhou 310027 China

An important functioning mechanism of biological macromolecules is the transition between different conformed states due to thermal fluctuation. In the present paper, a biological macromolecule is modeled as two strands with side chains facing each other, and its stochastic dynamics including the statistics of stationary motion and the statistics of conformational transition is studied by using the stochastic averaging method for quasi Hamikonian systems. The theoretical results are confirmed with the results from Monte Carlo simulation.

关键词： Biological macromolecule Thermal fluctuation Stationary statistics Transition time Stochastic averaging method

Aflatoxin sufferer and p53 gene mutation in hepatocellular carcinoma

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World Journal of Gastroenterology 1998年第1期4卷 33-34页

作者： deng Zhuo-lin MA Yun 不详

IM To study the p53 gene mutation and its relationship to aflatoxin B1 exposure in hepatocellular carcinoma (HCC).METHODS Restriction fragment length polymorphism analysis method was used in 62 HCC samples, and DNA direct sequencing in another 45 HCC samples.RESULTS In HCC and AFB1 high and lowrisk areas, 36/52 (69%) and 2/10 (20%) cases were found losing the HaeⅢ allele respectively, suggesting one of the base G mutation at the p53 gene codon 249. Similar results appeared in DNA direct sequencing, 20/35 (57%) and 1/10 (10%) respectively mutated at the codon 249 third base G to C transversion.CONCLUSION In HCC after AFB1 exposure, mutation of p53 gene is fixed at codon 249 third base and take the form of G to T transversion. This is a definite marker of mutation which is induced by AFB1 mutagen. It is applicable for molecular epidemiologic survey of the sufferers of AFB1 among HCC cases and for discovering more unknown natural AFB1 contaminated areas..

关键词： Aflatoxin B1 genes,p53 mutation carcinoma,hepatocellular liver neoplasms

Effective interactions between two impurities in quasi-two-dimensional dipolar Bose–Einstein condensates

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Communications in Theoretical Physics 2020年第7期72卷 65-70页

作者： Fu-lin deng Tao Shi Su Yi CAS Key Laboratory of Theoretical Physics Institute of Theoretical PhysicsChinese Academy of SciencesBeijing 100190China School of Physical Sciences University of Chinese Academy of SciencesBeijing 100049China CAS Center for Excellence in Topological Quantum Computation University of Chinese Academy of SciencesBeijing 100049China

We investigate the effective interaction between two heavy impurities immersed in a quasi-twodimensional dipolar Bose-Einstein condensate via a variation *** show that the mediated interaction is highly tunable via the contact and the dipole-dipole interactions between the background gas ***,the mediated interaction potential may become an oscillating function of inter-impurity distance when roton excitation emerges under sufficiently strong dipolar *** system therefore provides an efficient way for tuning the mediated interaction between impurities.

关键词： dipolar gas impurity effective interaction roton excitation

The impact of vertical resolution on the simulation of Typhoon Lekima (2019) by a cloud-permitting model

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Frontiers of Earth Science 2022年第1期16卷 158-174页

作者： Mengjuan LIU lin deng Wei HUANG Wanchen WU Shanghai Typhoon Institute China Meteorological AdministrationShanghai 200030China Key Laboratory of Numerical Modeling for Tropical Cyclone of China Meteorological Administration Shanghai 200030China

The impact of vertical resolution on the simulation of Typhoon Lekima(2019)is investigated using the Weather Research and Forecasting(WRF)model version *** show that decreasing vertical grid spacing from approximately 1000 m to 100 m above 1 km height barely influences the simulated ***,significant differences are found in the simulated tropical cyclone(TC)*** simulation with the coarsest vertical resolution shows a clear double warm-core *** upper warm core weakens and even disappears with the increase of vertical resolution.A broader eye and a more slantwise eyewall are observed with the increase of vertical resolution due to the vertically extended lower-level and upper-level outflow,which likely results in a weaker *** grid convergence is evaluated with the simulated kinetic energy(KE)*** the vertical grid spacing becomes finer than 200 m,convergent KE spectra are found in both the free atmosphere and the outer core of the ***,sensitivity tests reveal that the grid convergence is sensitive to the choice of the planetary boundary layer scheme.

关键词： vertical resolution tropical cyclone warm core kinetic energy spectra

Surgical treatment for primary angle closure-glaucoma: a Meta analysis

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International Journal of Ophthalmology(English edition) 2011年第3期4卷 223-227页

作者： Bo-lin deng, Jing Tian Evidence-Based Medicine Center School of Basic Medical Sciences Lanzhou University Lanzhou 730000 Gansu Province China Department of Ophthalmology Second Hospital of Lanzhou University Lanzhou 730000 Gansu Province China Department of Cardiovascular Medicine Second Hospital of Lanzhou University Lanzhou 730000 Gansu Province China

AIM To evaluate the efficacy and safety of trabeculectomy, phacotrabeculectomy plus intraocular lens implantation (phacotrab+IOL group) and phacoemulsification with IOL (phaco+IOL) in primary angle-closure glaucoma(PACG). METHODS: It was a systematic review and meta-analysis, randomized controlled trials(RCT) and clinical controlled trials (CCT) were collected through electronic searches of the Cochrane Library, PubMed, EMbase, Wanfang Database online, Chinese journal Full-text Database, Chinese Scientific Journals Full-text Database (from the date of building the database to October 2010) We also checked the bibliographies of retrieved articles. M the related data that matched our standards were abstracted. The quality of included trials was evaluated according to the Dutch Cochrane Centre. Rev Man 5.0 software was used for Meta-analysis. RESULTS: A total of 5 RCT and 11 CCT involving 1495 eyes were included. The results of meta-analysis showed that phacotrab+IOL group was superior than trabeculectomy(trab group) (MD -3.93,95% CI [-7.31, -0.54]) which was also superior than phaco+IOL group(MD 0.52,95%CI [0.10, 0.95]) in decreasing Intraocular Pressure(IOP). Phacotrab group(MD -1.45,95%CI [-1.68, -1.22])and phaco group (MD-1.12,95% CI [-1.87, -0.37])are both deeper than trab group in the anterior chamber depth. In increasing the coefficient of outflow facility of aqueous humor (C values) there was no statistical difference in the three groups. And there was no statistical difference between phacotrab groups and phaco groups in visual acuity but phacotrab group was superior than phaco group (MD 1.07, 95% CI [0.73, 1.40])in the use of IOP-lowering drugs. There was no statistical difference among three groups. CONCLUSION: Current evidence suggests that phacotrab+IOL group was superior than tab group which was also superior than phaco+IOL group in decreasing IOP. Phacotrab group and phaco group are both deeper than trab group in the anterior chamber depth. Phacotrab gro

关键词： trabeculectomy phacoemulsification phacotrabeculectomy primary angle-closure glaucoma meta-analysis

The potential role of the three-dimensional-bioprinting model in screening and developing drugs

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World Journal of Gastroenterology 2022年第47期28卷 6788-6790页

作者： Chao-lin deng Bin Wu Department of General Surgery Peking Union Medical College HospitalChinese Academy of Medical Sciences and Peking Union Medical CollegeBeijing 100730China

Recently,we have read with great interest the original article used different spatial configuration models of colorectal cancer(CRC)for validating the antitumor efficacy with *** feel obliged to provide new insight into the drug screening models by integrating and analyzing the original method and *** comments may provide comprehensive insights into threedimensional drug screening models and the difference between pathologic subtypes in CRC.

关键词： Colorectal cancer three-dimensional-bioprinting Mucinous adenocarcinoma Drug screening models

ENSO frequency change in coupled climate models as response to the increasing CO_2 concentration

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Chinese Science Bulletin 2010年第8期55卷 744-751页

作者： deng lin YANG XiuQun XIE Qian School of Atmospheric Sciences Nanjing University Nanjing 210093 China Institute of Meteorology PLA University of Science and Technology Nanjing 211101 China

The response of ENSO frequency to the increasing CO2 concentration and associated mechanism are examined with outputs of four coupled climate models (GFDL/CM2.0,CNRM/CM3,IPSL/CM4 and INM/CM3.0) submitted to the IPCC Fourth Assessment Report (IPCC AR4).Results reveal a significant change of ENSO frequency as response to the increasing CO2 ***,such a change exhibits an evident model *** ENSO frequency tends to increase in GFDL/CM2.0 and CNRM/CM3 models and decreases in IPSL/CM4 and INM/CM3.0 *** model dependence is found to be determined by how the model climatological background state of the tropical Pacific responds to the increasing CO 2 *** is demonstrated that the change of zonally-and vertically-averaged climatological background upper ocean temperature gradient between the equator and off-equator is crucially responsible for the ENSO frequency *** response to the increasing CO 2 concentration,the climatological background temperature gradient is increased in GFDL/CM2.0 and CNRM/CM3 models and decreased in IPSL/CM4 and INM/CM3.0 *** terms of the recharge-discharge oscillator theory for ENSO,the increased (decreased) climatological background temperature gradient between the equator and off-equator induces a faster (slower) exchange of oceanic heat content between the equator and off-equator,thus giving rise to a shorter (longer) ENSO timescale and a higher (lower) ENSO frequency.

关键词：二氧化碳浓度 ENSO 频率响应气候模式耦合气候背景温度梯度评估报告

Microphysical Properties of Rainwater in Typhoon Usagi(2013):A Numerical Modeling Study

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Advances in Atmospheric Sciences 2019年第5期36卷 510-526页

作者： lin deng Wenhua GAO Yihong DUAN Yuqing WANG Nanjing University of Information Science and Technology State Key Laboratory of Severe Weather Chinese Academy of Meteorological Sciences International Pacific Research Center and Department of Atmospheric Sciences School of Ocean and Earth Science and Technology University of Hawai'i at Mānoa

A 2-km resolution simulation using the Weather Research and Forecasting model with Morrison microphysics was employed to investigate the rainwater microphysical properties during different stages of Typhoon Usagi(2013) in the inner-core and outer region. The model reproduced the track, intensity, and overall structure of Usagi(2013) reasonably. The simulated raindrop size distribution showed a rapid increase in small-size raindrop concentration but an oscillated decrease in large-size ones in the inner-core region, corresponding well with the upward motion. It was found that there existed two levels(1.25 and 5.25 km) of maximum number concentration of raindrops. The ice-related microphysics at high levels was stronger than the warm-rain processes at low levels. The larger raindrops formed by self-collection in the inner-core suffered from significant breakup, but the raindrops outside the eyewall did not experience evident breakup. Model results indicated that the dominant terms in the water vapor budget were the horizontal moisture flux convergence(HFC) and local condensation and deposition. The evaporation from the ocean surface(PBL) was ~10% of the HFC in the inner core, but up to 40% in the outer region as the air therein was far from saturation. Furthermore, water vapor in the outer region was obtained equally through evaporation from the cloud and inward transportation from the environment. An earlier start of cloud microphysical processes in the inner-core region was evident during the intensification stage, and the continuous decreasing of condensation in both the inner-core and outer regions might imply the beginning of the storm weakening.

关键词： raindrops microphysical properties typhoon simulation