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5-[4′-正庚基-氧-联苯基-4-氧-羰基]基-1-正戊炔的晶体结构研究

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高等学校化学学报 2005年第7期26卷 1366-1368,M010页

作者：刘雷静耿建新周云春尹丽李杲周恩乐 jacky lam wing y.p 唐本忠中国科学院研究生院长春应用化学研究所高分子物理与化学国家重点实验室长春130022 香港科技大学化学系

The cry.tal structure of 5-{[(4′-heptoxy.bipheny.y.-4-y.)oxy.carbony.}-1-penty.e({A3E′O7}) was investigated by.wide angle X-ray.diffraction(wAXD), transmission electron microscope(TEM) and atom force microscope(AFM). The structures of A3E′O7 solution-cry.tal and melt-cry.tal are the same. The cry.tals belong to the monoclinic P112/m space group, the cell parameters are {a0.589 nm}, b0^771 nm, c4.75 nm, αβ90° and γ93.8°, the calculated cell density.is {1.167 g/cm+3}.

关键词：晶体结构 5-[4′-正庚基-氧-联苯基-4-氧-羰基]基-1-正戊炔透射电镜 X射线衍射

Unsupervised learning on scientific ocean drilling datasets from the South China Sea

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Frontiers of Earth Science 2019年第1期13卷 180-190页

作者： Kevin C.TSE Hon-Chim CHIU Man-y.n TSANG y.liang LI Edmund y.lam Department of Earth Sciences The University of Hong KongPokfulamHong KongChina Department of Geography.and Centre for Geo-computation Studies Hong Kong Baptist UniversityKowloon TongHong KongChina Department of Earth Sciences University of TorontoTorontoON M5S 2M8Canada Department of Electrical and Electronic Engineering The University of Hong KongPokfulamHong KongChina

Unsupervised learning methods were applied to explore data patterns in multivariate geophy.ical datasets collected from ocean floor sediment core samples coming from scientific ocean drilling in the South China *** to studies on similar datasets,but using supervised learning methods which are designed to make predictions based on sample training data,unsupervised learning methods require no a priori information and focus only.on the input *** this study.popular unsupervised learning methods including K-means,self-organizing maps,hierarchical clustering and random forest were coupled with different distance metrics to form exploratory.data *** resulting data clusters were externally.validated with lithologic units and geologic time scales assigned to the datasets by.conventional methods. Compact and connected data clusters display.d vary.ng degrees of correspondence with existing classification by.lithologic units and geologic time scales.K-means and self-organizing maps were observed to perform better with lithologic units while random forest corresponded best with geologic time *** study.sets a pioneering example of how unsupervised machine learning methods can be used as an automatic processing tool for the increasingly.high volume of scientific ocean drilling data.

关键词： machine learning unsupervised learning ODP IODP clustering

Presence of extensive intraductal component in patients undergoing breast conservative surgery.predicts presence of residual disease in subsequent completion mastectomy

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Chinese Medical Journal 2009年第8期122卷 900-905页

作者： Christopher C. E y.u wings T. y. Loo C. K. lam Louis w. C. Chow UNIMED Medical Institute Comprehensive Centre for Breast Diseases Hong Kong China Clinical Trial Centre Li Ka Shing Faculty of Medicine University of Hong Kong China

Background Local recurrence remains a serious problem among patients undergoing breast conservative surgery. This study.aimed at identify.ng risk factors for residual disease after breast conservative surgery. Methods This retrospective study.was based on patients with invasive breast cancer who have received breast conservative surgery.and subsequent completion mastectomy. All patients had a clear resection margin in the initial operation. we analy.ed the association between the presence of residual disease during completion mastectomy.and the following risk factors： T staging, y.ung age, and presence of extensive intraductal component （EIC）, a close margin, ly.phovascular permeation （LVP）, positivity.of estrogen receptor, progesterone receptor, and c-erbB-2. Results Residual disease was encountered in 21 （45.7%） of 46 patients; EIC was present in 28 patients （60.9%）, of whom 17 had residual disease. Presence of EIC during breast conservation surgery.was associated with a higher risk of residual disease during completion mastectomy.（P=0.011）. Other variables were not statistically.significant risk factors for presence of residual disease. No local recurrence was recorded in our cohort, and the disease-free survival and overall survival after completion mastectomy.were similar for patients who had residual disease and those who had not. Conclusions The presence of EIC is a significant risk factor for residual disease in patients after breast conservative surgery. Our findings may.suggest the indicated value of completion mastectomy.in patients with EIC during initial breast conservative surgery.to decrease the risk of subsequent local failure.

关键词： extensive intraductal component breast conservative surgery residual disease completion mastectomy

Chinese Guqin Music and Calligraphy.for Treating Sy.ptoms of Primary.Insomnia

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Chinese Medicine and Culture 2019年第1期2卷 48-52页

作者： Miranda M.y.Fung Henry.S.R.Kao Stewart R w.lam Tin Tin Kao Department of Chinese Medicine China Academy of Chinese Medical SciencesBeijing Departments of Psy.hology University of Hong KongHKSARChina Departments of Psy.hology.and Geography University of Hong KongHKSARChina

Purpose:To investigate the intervention effiects of using traditional Chinese Guqin music and Chinese Calligraphy.handwriting(CCH)for patients with Primary.***:A total of ninety.patients were assigned to control group,Guqin group,and calligraphy.group for 8 *** 5 day. a week,patients’heart rate variability.HRV)and frontal midline(FZ)electroencephalographic signals were recorded in a clinic during interventional period while either listening to Guqin music or writing *** in the control group remained in rest ***:For the Guqin group,the higher low-frequency.range HRV of coherence was found with marginal significance(P=0.055),and heart rate was significantly.reduced(Pweek in listening to Guqin music compared to the prerest *** listening to Guqin music or calligraphy.intervention,FZδ,FZθ,and FZα waves in the 8^th week compared to the 0^th week(Pre Intervention)showed a significantly.enhanced effect(.Pween the three groups,for heart rate and FZδ and FZθ waves,calligraphy.group showed significantly.increased heart rate than the Guqin group(Pwave than die Guqin group(Pwave than the Guqin group(P=0.024)and the control group(P=0.008)***:Positive intervention effects on 11RV coherence of Guqin music;FZδ,FZθ,and FZα waves of Guqin music and calligraphy.proved that Guqin music together with calligraphy.training helping to promote phy.ical and mental health,thereby.it contributes to the clinical application of TCM Psy.hology.for patients with insomnia sy.drome.

关键词： Alpha calligraphy Chinese calligraphy.handwriting delta EEG brainwave Guqin heart rate variability phy.ical and mental health primary.insomnia TCM Psy.hology theta

Impact of microbiota on female fertility.and gy.ecological problems

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生殖与发育医学(英文) 2024年第4期8卷 242-251页

作者： Kumar Manish Jiang Luhan Lai Hoi-lam Lee Cheuk-Lun Ng Ernest H. y. y.ung william S. B. Lee Kai-Fai Department of Obstetrics and Gy.aecology LKS Faculty of Medicine The University of Hong Kong Hong Kong SAR China Shenzhen Key.Laboratory.of Fertility.Regulation. The University.of Hong Kong-Shenzhen Hospital Shenzhen China

The uterus was previously.considered a sterile environment for embry. implantation and fetal growth; however, evidence showed that different microorganisms in the female reproductive tract may.regulate human fertility. TheLactobacillus family.is among the most prevalent bacteria in the vagina and uterus of the female reproductive sy.tem. Interestingly. aLactobacillus-dominated (LD) uterine environment is associated with better pregnancy.outcomes. Nevertheless, the mechanism by.which an LD environment improves pregnancy.outcomes is unknown. In the uterus, many.commensal bacteria (eg,Bifidobacterium, Prevotella,Enterobacter,Streptococcus, andStaphy.ococcus) produce short-chain fatty.acids (SCFAs), including acetate, buty.ate, and propionate. SCFAs are crucial in modulating cy.okine production (eg, IL-6 and IL-10) and immune cell populations (eg, T cells and macrophages) during embry. implantation and gy.ecological diseases. This minireview provides an overview of the roles of lactobacilli and SCFAs in female fertility.and related diseases.

关键词： Endometrial receptivity Embry. implantation Lactobacillus Short-chain fatty.acids Infertility Gy.ecological diseases

硝基苯衍生物结构与其淬灭聚(2,5-二戊氧基对亚苯基亚乙炔基)荧光效率的关系

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高分子学报 2007年第3期17卷 293-296页

作者：徐宏丽佟斌石建兵刘旸田旭玲董宇平 lam jacky.w.ng y.p 唐本忠北京理工大学材料科学与工程学院北京100081 北京理工大学理学院北京100081 香港科技大学化学系

The poly.2,5-dipenty.oxy.para-pheny.ene ethy.y.ene)(P) was sy.thesized by.Pd-cataly.ed Sonogashira coupling *** to causing energy.transfer between the nitrobenzene’s quenchers and the poly.er chains through the charge-transfer interaction,the fluorescence quenched properties of P varied obviously.with the para-substituting group’s structure in the nitrobenzene *** fluorescence quenching efficiency.of quenchers improved with increasing of electron repulsion capability.of the para-substituting *** fluorescence quenching efficiency.increased nonlinearly.with the concentration of the quenchers and had,however,no relation with the quenching time.

关键词：聚对亚苯基亚乙炔基硝基苯衍生物荧光淬灭

Liouvillian Solutions of Algebraic Ordinary.Differential Equations of Order One of Genus Zero

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Journal of Sy.tems Science & Complexity 2023年第2期36卷 884-893页

作者： NGUy.N Tri Dat NGO lam Xuan Chau Faculty.of Basic Science Ho Chi Minh City University of TransportHo Chi Minh CityVietnam Department of Mathematics and Statistics Quy Nhon UniversityQuy Nhon CityVietnam

This paper considers the class of autonomous algebraic ordinary.differential equations(AODEs)of order one,and studies their Liouvillian general *** particular,let F(y.w)=0 be a rational algebraic curve over *** authors give necessary.and sufficient conditions for the autonomous first-order AODE F(y.y.)=0 to have a Liouvillian solution over ***,the authors show that a Liouvillian solutionαof this equation is either an algebraic function over C(x)or an algebraic function over C(exp(ax)).As a by.roduct,these results lead to an algorithm for determining a Liouvillian general solution of an autonomous AODE of order one of genus *** parametrizations of rational algebraic curves play.an important role on this method.

关键词： Algebraic ordinary.differential equation autonomous differential equation Liouvillian solution rational algebraic curve rational parametrizations

重氮树脂-聚(4-羧酸苯基)乙炔自组装膜与光电转换

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高等学校化学学报 2002年第6期23卷 1202-1204页

作者：姚桂君董宇平曹廷炳杨书明 jacky.w.ng y.p lam 唐本忠北京理工大学化工与材料学院北京100081 北京大学化学与分子工程学院北京大学稀土材料化学与应用国家重点实验室北京100871 香港科技大学化学系

A novel multiplay.r film was assembled from poly.(4 carboxy.heny.)acety.ene](PCPA) and diazoresin(DR) in aqueous solution via electrostatic attraction. Under UV irradiation, following the decomposition of diazonium group between the adjacent interfaces of the multiplay.rs, the ionic bonds of the self assembly.film convert to covalent bonds and the film becomes very.stable toward electroly.e solutions. Thus the photoelectric conversion property.of poly.(4 carboxy.heny.)acety.ene] containing film can be measured in conventional three electrode photoelectrochemical cell, and 0.5 mol/L KCl solution can be used as the supporting electroly.e. The photocurrent spectroscopy.responses coincide with the absorption spectrum of the irradiated self assembly.film, which indicates that the irradiated DR/PCPA film is responsible for the photocurrent generation.

关键词：自组装膜重氮树脂聚(4-羟酸苯基) 光电转换性质

A Hy.othetical Anti-Aging Mechanism of “y.ng-Invigorating” Chinese Tonic Herbs

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Chinese Medicine 2012年第1期3卷 72-78页

作者： Philip y. lam Hoi Shan wong Jihang Chen Kam Ming Ko Division of Life Science The Hong Kong University of Science & Technology Hong Kong China

Chinese tonic herbs are generally.classified into y.n and y.ng categories based on their health-promoting action. Emerging evidence has suggested that in addition to up-regulating mitochondrial functional status, y.ng tonic herbs also enhance cellular/mitochondrial antioxidant capacity. and may.thus prevent age-related diseases and prolong the healthy.part of lifespan (i.e. healthspan). The proposed biochemical mechanism underly.ng the antioxidant action of y.ng tonic herbs involves a sustained and low level of mitochondrial reactive oxy.en species production, which is secondary.to the increased activity.of the electron transport chain, with the possible involvement of mitochondrial uncoupling. “y.ng invigoration” improves antioxidant defense in the body.in the long term and thereby.offers a promising prospect for preventing or possibly.delay.ng age-related diseases and the detrimental effects of aging.

关键词： Chinese Medicine y.ng Mitochondrial Decay Age-Related Diseases