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Induction of significant intraocular pressure diurnal fluctuation in rats using a modified technique of microbead occlusion

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International Journal of Ophthalmology(English edition) 2018年第7期11卷 1114-1119页

作者： Lin Fu Jimmy shiu ming lai Amy Cheuk Yin Lo Kendrick Co Shih Affiliated Eye Hospital School of Ophthalmology and Optometry Wenzhou Medical University Department of Ophthalmology Li Ka Shing Faculty of Medicine University of Hong Kong

AIM： To investigate the effect of microbead iridocorneal angle occlusion on intraocular pressure（IOP） diurnal fluctuation in rat eyes. METHODS： Male Dark Agouti（DA） rats, 8-10 week old, were each given a single intracameral injection of microbeads, followed by injection of dispersive viscoelastic solution. The right eye served as the experimental eye, while the left eye served as the control. IOP was measured twice daily postoperatively for 3 wk and compared between groups. At the end of 3 wk, the rats were sacrificed and the eyes were harvested for histological analysis and retinal ganglion cell（RGC） counting. RESULTS： After microbead injection, experimental eyes had significantly higher dark time IOP than controls from the second week to the third week [2 nd week： 22.92±1.631 mm Hg（n=5） vs 17.35±0.751 mm Hg（n=5）; 3 rd week： 23.59±1.494 mm Hg vs 17.73±0.592 mm Hg（n=5）], while light time IOP was comparable between groups. The fluctuation levels of IOP in the experimental eyes were 7.21±0.398 mm Hg（n=5）, 9.50±1.017 mm Hg（n=5） and 10.66±0.894 mm Hg（n=5） from the first week to the third week after injection. Comparatively, they were significantly lower in the control eyes, which were 4.69±0.323 mm Hg（n=5）, 2.84±1.122 mm Hg（n=5） and 4.98±0.603 mm Hg（n=5） respectively. However, at the end of 3 wk, the larger fluctuations in IOP in the experimental eyes was not associated with a significant loss of RGCs. CONCLUSION： Microbead occlusion exacerbates diurnal IOP fluctuation in rats. This reported model may serve as a method of investigating the pathological effects of IOP fluctuation. A longer observation period, or repeated injections, may be needed to observe a significant change in RGC density.

关键词： microbead occlusion diurnal intraocular pressure fluctuation glaucoma rat

A cross-sectional study on compliance with topical glaucoma medication and its associated socioeconomic burden for a Chinese population

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International Journal of Ophthalmology(English edition) 2017年第2期10卷 293-299页

作者： Man-Hin Lui Jason Chun Ho Lam Yi Lee Kwong Tak Siu Wong Pak Long Cheung Sherri Shun Yan lai Pak Lun Yuen Wai Yiu Lam Ho Yan Chan Yiu Fai Wong Jimmy shiu ming lai Kendrick Co Shih Li Ka Shing Faculty of Medicine the University of Hong KongPokfulamHong KongChina Department of Ophthalmology Li Ka Shing Faculty of Medicinethe University of Hong KongPokfulamHongKongChina Department of Ophthalmology Queen Mary HospitalPokfulamHong KongChina

AIM： To estimate the overall drug compliance for local Chinese glaucoma patients on long-term topical ***： This was a retrospective cross-sectional ***-seven primary glaucoma patients from the subspecialty clinic of a publicly-funded tertiary care hospital in Hong Kong completed a questionnaire on compliance with topical glaucoma medication,attitude towards glaucoma and therapy and vision related quality of *** was defined as reporting missing more than or equal to 10% of the prescribed topical glaucoma medication during the 2wk immediately prior to the *** between noncompliance and demographics,attitude,disease and treatment status was *** was estimated with quality of life and direct medical cost involved with *** logistic regression on noncompliance was performed on selected ***： Compliance was calculated as 75%（95% CI： 64%-87%） among 57 subjects（mean age 69 y,female 51%）.No statistical significant relationship was established between noncompliance and any single factors or ***（P=0.048） and forgetfulness（P=0.064） were found to be marginally significant predictive factors on noncompliance in multivariable logistic *** might be related（P=0.130） to poorer self-rated vision-associated quality of *** societal cost of noncompliance was estimated to be over 2510 life-years and US$ 3.7 million ***： The compliance of Chinese glaucoma patients in Hong Kong is comparable to other parts in the world,and carries detrimental impacts on individual and societal *** and forgetfulness are two possible independent predictors for noncompliance.

关键词： glaucoma eye drop compliance quality of life

Synthesis of benzo[b]phosphole-based alkynylgold(I)complexes with resistive memory properties modulated by donor–acceptor chromophores

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SmartMat 2021年第3期2卷 406-418页

作者： Yat-Hin Cheng Eugene Yau-Hin Hong ming-Yi Leung shiu-Lun lai Vivian Wing-Wah Yam Institute of Molecular Functional Materials and Department of Chemistry The University of Hong KongHong KongChina

A class of benzo[b]phosphole-based alkynylgold(I)complexes has been synthesized and *** complexes share a similar benzo-[b]phosphole ligand,in which the phosphole moiety is substituted with variousπ-conjugated units with different donor strengths,namely phenoxazinylphenyl,tris(di-tert-butylcarbazolyl)phenyl and 2,4-dimethylphenyl *** phosphole-containing gold(I)complexes are found to be strongly luminescent in toluene with tunable emission maxima and possess solvatochromic behaviors,suggesting an emission of metal-perturbed intraligand charge transfer *** voltammetry studies reveal that the presence of gold(I)metal center strongly perturbs the electronic properties of the phosphole moiety of the resultant complexes,which can be further finetuned by the auxiliary ligand on the gold(I)*** the resistive memory studies,devices based on these alkynylgold(I)complexes exhibit satisfactory binary memory behaviors,demonstrating low threshold voltages in narrow distributions,high durability and low misreading *** performances are believed to be originated from a field-induced charge transfer of the alkynylgold(I)complexes,in which the electron-accepting phosphole-gold(I)unit plays a crucial role in stabilizing the charge transfer state and that led to the observed resistive switching and memory behavior.

关键词： alkynylgold(I)complexes benzo[b]phosphole charge transfer donor-acceptor resistive memories

*** rescue in retinitis pigmentosa by the treatment of Lycium barbarum(Random Clinical Trial)

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Annals of Eye Science 2017年第1期 356-356页

作者： Henry Chan Hang-I Lam Kwok-Fai So Raymond Chuen-Chung Chang shiu-ming lai Chi-Wai Do Iris F.F.Benzie Chin-Pan Leung Kai-Yip Choi Man-Pan Chin Zhe-Chuang Li Wing-Yan Yu Laboratory of Experimental Optometry(Neuroscience) School of OptometryThe Hong Kong Polytechnic UniversityHong Kong SARChina Guangdong-Hongkong-Macao(GHM)Institute of CNS Regeneration Jinan UniversityGuangzhouChina School of Biomedical Sciences The University of Hong KongHong Kong SARChina Department of Ophthalmology The University of Hong KongHong Kong SARChina Laboratory of Experimental Optometry(Biophysic) School of OptometryThe Hong Kong Polytechnic UniversityHong Kong SARChina Department of Health Technology and Informatics The Hong Kong Polytechnic UniversityHong Kong SARChina Private practice Chinese medical doctor

Retinitis pigmentosa(RP)is a group of heredofamilial retinal diseases which is characterized by night blindness and progressive visual field *** study aims to study the treatment effect of Lycium barbarum(LB)on retinal functions and structure of RP *** study is a double-masked randomized controlled *** subjects received scheduled eye examination including visual acuity(VA),Humphrey field analysis(HFA),ganzfeld flash electroretinogram(ffERG)and optical coherence tomography(OCT).The suitable subjects were randomly allocated to either LB-treatment or placebo groups with the supply of LB or placebo for 12 *** were total 41 RP subjects(22 in LB group and 19 in placebo group)completed the 12 months *** compliance rates for LB and placebo groups were 89.8%±12.5%and 85.3%±7.7%*** compared with placebo group,there were no deteriorations of both high and low contrast VA in LB group(P<0.01).In addition,certain improvements of scotopic rod response and photopic cone response of ffERG were obtained in LB group(P<0.05).In the OCT measurement,an obvious thinning of macular thickness was observed in placebo group but not found in LB group(P<0.05).However,there were no changes found in the sensitivity of central visual field between two *** results confirm that the 12-month LB treatment for RP patients had neuroprotective effect on retina and is believed to delay or minimize the deterioration of visual function in RP.

关键词： Retinitis pigmentosa(RP) Lycium barbarum(LB) neuroprotection cone retina

Reflection of Typhoon Morakot-The Challenge of Compound Disaster Simulation

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Journal of Mountain Science 2011年第4期8卷 571-581页

作者： CHEN Yu-shiu KUO Yu-Shu lai Wen-Chi TSAI Yuan-Jung LEE Shin-Ping CHEN Kun-Ting SHIEH Chjeng-Lun Department of Hydraulic and Ocean Engineering National Cheng-Kung University Taiwan 7o1o1 China Disaster Prevention Research Institute National Cheng-Kung University Tainan Taiwan China

Climate change has altered locally singletype disasters to large-scale compound disasters because of increasing intensity and frequency of extreme rainfall *** compound disasters can combine small-scale floods,debris flows,shallow landslides,deep-seated landslides,and landslide lakes into a large-scale single disaster *** simulation models and evaluation tools are available for single-type disasters,no single model is well developed for compound disasters due to the difficulty of handling the interrelationship between two successive single-type *** study proposes a structure for linking available single-type simulation models to evaluate compound disasters and provides a useful tool of decision making for warning and planning of disaster reduction.

关键词：灾害事件复合模拟台风浅层滑坡评价工具仿真模型气候变化

Rapid synthesis of Ti-MCM-41 by microwave-assisted hydrothermal method towards photocatalytic degradation of oxytetracycline

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Journal of Environmental Sciences 2016年第6期28卷 76-87页

作者： Hanlin Chen Yen-Ping Peng Ku-Fan Chen Chia-Hsiang lai Yung-Chang Lin College of Environment and Energy South China University of Technology Department of Environmental Science and Engineering Tunghai University Department of Civil Engineering "National"Chi Nan University Department of Safety Health and Environmental EngineeringCentral Taiwan University of Science and Technology Department of Electrical Engineering Cheng Shiu University

This study employed microwave-assisted hydrothermal method to synthesize Ti-MCM-41,which are mesoporous materials with a high surface area and excellent photocatalytic ability. Fourier transform infrared spectroscopy（FTIR）, X-ray diffraction（XRD）, X-ray photoelectron spectroscopy（XPS）, transmission electron microscopy（TEM）, and ultraviolet–visible spectroscopy（UV–Vis） were employed. The XRD findings showed that Ti-MCM-41 exhibited a peak at 2θ of 2.2°, which was attributed to the hexagonal MCM-41 structure. The BET（Brunauer–Emmett–Teller） results agreed with the TEM findings that Ti-MCM-41 has a pore size of about 3–5 nm and a high surface area of 883 m-2/g. FTIR results illustrated the existence of Si–O–Si and Si–O–Ti bonds in Ti-MCM-41. The appearance of Ti2 p peaks in the XPS results confirmed the FTIR findings that the Ti was successfully doped into the MCM-41 structure. Zeta（ζ）-potential results indicated that the iso-electric point（IEP） of Ti-MCM-41 was at about pH 3.02. In this study, the photocatalytic degradation of oxytetracycline（OTC） at different pH was investigated under Hg lamp irradiation（wavelength 365 nm）. The rate constant（K′obs） for OTC degradation was 0.012 min-1at pH 3. Furthermore, TOC（total organic carbon） and high resolution LC–MS（liquid chromatography–mass spectrometry） analyses were conducted to elucidate the possible intermediate products and degradation pathway for OTC. The TOC removal efficiency of OTC degradation was 87.0%, 74.4% and 50.9% at pH 3, 7 and 10, respectively. LC–MS analysis results showed that the degradation products from OTC resulted from the removal of functional groups from the OTC ring.

关键词： Oxytetracycline Ti-MCM-41 Microwave hydrothermal synthesis Photocatalytic degradation

Differing coping mechanisms, stress level and anorectal physiology in patients with functional constipation

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World Journal of Gastroenterology 2005年第34期11卷 5362-5366页

作者： Annie OO Chan Cecilia Cheng Wai Mo Hui Wayne HC Hu Nina YH Wong KF Lam Wai Man Wong Kam Chuen lai shiu Kum Lam Benjamin CY Wong Department of Medicine the University of Hong Kong Hong Kong China Division of Social Science the Hong Kong University of Science and Technology Hong Kong China Department of Medicine the University of Hong Kong Hong Kong China Department of Statistics the University of Hong Kong Hong Kong China

AIM: To investigate coping mechanisms, constipation symptoms and anorectal physiology in 80 constipated subjects and 18 ***: Constipation was diagnosed by Rome Ⅱ *** ability and anxiety/depression were assessed by validated questionnaires. Transit time and balloon distension test were ***: 34.5% patients were classified as slow transit type of constipation. The total colonic transit time (56 h vs 10 h, P＜0.0001) and rectal sensation including urge sensation (79 mL vs 63 mL, P = 0.019) and maximum tolerable volume (110 mL vs95 mL, P = 0.03) differed in patients and controls. Constipated subjects had significantly higher anxiety and depression scores and lower SF-36 scores in all categories. They also demonstrated higher scores of'monitoring' coping strategy (14+6 vs9+3, P = 0.001),which correlated with the rectal distension sensation (P = 0.005), urge sensation (P=0.002), and maximum tolerable volume (P = 0.035). The less use of blunting strategy predicted slow transit constipation in both univariate (P = 0.01) and multivariate analysis (P = 0.03).CONCLUSION: Defective or ineffective use of coping strategies may be an important etiology in functional constipation and subsequently reflected in abnormal anorectal physiology.

关键词：肛门直肠生理学功能性便秘病理机制

Antralization at the edge of proximal gastric ulcers:Does Helicobacter pylori infection play a role?

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World Journal of Gastroenterology 2003年第6期9卷 1265-1269页

作者： Harry Hua-Xinag Xia shiu Kum Lam Wai Man Wong Wayne Hsing Cheng Hu Kam Chuen lai Sau Hing Wong Suet Yi Leung Siu Tsan Yuen Nicholas A.Wright Benjamin Chun-Yu Wong Department of Medicine The University of Hong KongHong Kong SARChina Department of Pathology The University of Hong KongHong Kong SARChina Histopathology Unit London Research InstituteCancer ResearchUK

AIM: To determine the prevalence of antralization at the edge of proximal gastric ulcers, and the effect ofH. pylori eradication on the mucosal appearances.METHODS: Biopsies were taken from the antrum, body and the ulcer edge of patients with benign proximal gastric ulcers before and one year after treatment. Gastric mucosa was classified as antral, transitional or body type.H. pylori positive patients receivedeither triple therapy, or omeprazole.RESULTS: Patients with index ulcers in the incisura, body or fundus (n=116) were analyzed. Antral-type mucosa was more prevalent at the ulcer edge inH. pylori-positive patients ***-negative patients (93% vs 60%, OR=8.95,95%CI: 2.47-32.4, P=0.001). At one year, there was a significant reduction in the prevalence of antralization (from 93 % to 61%, P=0.004) at the ulcer edge in patients with H. pyloribeing eradicated. However, there was no difference in the prevalence of antralization at the ulcer edge in those with persistent infection.CONCLUSION: H. pylori infection is associated with antralization at the edge of proximal gastric ulcers, which may be reversible in some patients after eradication of the infection.

关键词：胃溃疡幽门螺杆菌感染胃粘膜活组织检查

THE SYNTHESIS OF MENTHOL FROM PIPERITONE

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Chinese Science Bulletin 1966年第3期24卷 116-120页

作者：刘铸晋张及贤 Institute of Organic Chemistry Academia Sinica

Menthol is used extensively in pharmaceutical and food preparations. These include liquors, confectionary, perfumes, cigarettes, tooth paste, bathing powder, and cough drops among others. This substance owes its popularity mainly to its characteristic cooling effect as well as its pleasant odour. Although most of the menthol used today still come from certain natural sources such as the peppermint oil (derived from Mentha arvensis), synthetic products of accepted quality have recently become a commodity of considerable quantity. The starting materials used for the synthesis of menthol have included various essential oil con stituents, such as piperitone, citronellal, α-pinene, pulegone, and limonene, together with m-cresol.

关键词： pharmaceutical preparations today commodity pleasant popularity paste cough Mentha hydrogenation