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Anaerobic biodegradation of PAHs in mangrove sediment with amendment of NaHCO_3

Journal of Environmental Sciences 2015年第4期27卷 148-156页

作者： Chun-Hua Li yuk-shan wong Hong-Yuan Wang Nora Fung-Yee Tam State Key Laboratory of Environmental Criteria and Risk Assessment Chinese Research Academy of Environmental Sciences Department of Biology and Chemistry City University of Hong Kong Department of Biology The Hong Kong University of Science and Technology Key Laboratory of Nonpoint Source Pollution Control Ministry of Agriculture/Institute of Agricultural Resources and Regional PlanningChinese Academy of Agricultural Sciences State Key Laboratory on Marine Pollution City University of Hong Kong

Mangrove sediment is unique in chemical and biological properties. Many of them suffer polycyclic aromatic hydrocarbon（PAH） contamination. However, the study on PAH biological remediation for mangrove sediment is deficient. Enriched PAH-degrading microbial consortium and electron acceptor amendment are considered as two effective measures. Compared to other electron acceptors, the study on CO2, which is used by methanogens, is still seldom. This study investigated the effect of Na HCO3 amendment on the anaerobic biodegradation of four mixed PAHs, namely fluorene（Fl）, phenanthrene（Phe）,fluoranthene（Flua） and pyrene（Pyr）, with or without enriched PAH-degrading microbial consortium in mangrove sediment slurry. The trends of various parameters, including PAH concentrations, microbial population size, electron-transport system activities, electron acceptor and anaerobic gas production were monitored. The results revealed that the inoculation of enriched PAH-degrading consortium had a significant effect with half lives shortened by 7–13 days for 3-ring PAHs and 11–24 days for 4-ring PAHs. While Na HCO3 amendment did not have a significant effect on the biodegradation of PAHs and other parameters, except that CO2 gas in the headspace of experimental flasks was *** of the possible reasons is that mangrove sediment contains high concentrations of other electron acceptors which are easier to be utilized by anaerobic bacteria, the other one is that the anaerobes in mangrove sediment can produce enough CO2 gas even without adding Na HCO3.

关键词： Anaerobic biodegradation Electron acceptor amendment Mangrove sediment Na HCO3amendment Polycyclic aromatic hydrocarbon

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人工污水中的磷在模拟秋茄湿地系统中的分配与循环

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生态学报 1999年第2期19卷 236-241页

作者：缪绅裕陈桂珠黄玉山谭凤仪广州师范学院生物系中山大学环境科学研究所香港科技大学研究中心香港城市理工大学应用科学系

在温室中建立模拟秋茄湿地系统，含底泥、潮汐海水和１年生秋茄苗。对照组用１５‰的人工海水，污水处理组分别用正常、５倍和１０倍浓度的人工污水每时、定量对模拟系统污２次，持续１ａ，用以研究Ｐ在系统中的分配和循环。结果表明：... 详细信息

在温室中建立模拟秋茄湿地系统，含底泥、潮汐海水和１年生秋茄苗。对照组用１５‰的人工海水，污水处理组分别用正常、５倍和１０倍浓度的人工污水每时、定量对模拟系统污２次，持续１ａ，用以研究Ｐ在系统中的分配和循环。结果表明：加入系统的污Ｐ主要存留在土壤中，留存于植物体物凋落叶中的很少；植物吸收土壤或污水中的Ｐ在污水处理组中，以叶中含量最大，对对照组以根含量最高有明显的区别；

关键词：秋茄模拟湿地系统人工污水磷元素循环红树林

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Wavelength-dependent nonlinear wavefront shaping in 3D nonlinear photonic crystal

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Chinese Optics Letters 2024年第7期22卷 66-70页

作者： Yunze Wang Yan Sheng shan Liu Ruwei Zhao Tianxiang Xu Tiefeng Xu Feng Chen Wieslaw Krolikowski Laboratory of Infrared Materials and Devices Research Institute of Advanced TechnologiesNingbo UniversityNingbo 315211China Engineering Research Center for Advanced Infrared Photoelectric Materials and Devices of Zhejiang Province Ningbo UniversityNingbo 315211China Quantum Science and Technology Research School of PhysicsAustralian National UniversityCanberraACT 2601Australia Ningbo Institute of Oceanography Ningbo 315832China State Key Laboratory of Crystal Materials and Key Laboratory of Particle Physics and Particle Irradiation of the Ministry of Education School of PhysicsShandong UniversityJinan 250100China

A 3D nonlinear photonic crystal containing four parallel segments of periodicχ^((2))grating structure is fabricated employing the femtosecond laser poling of ferroelectric Ca_(0.28)Ba_(0.72)Nb_(2)O_(6) *** second harmonic generation from this foursegment structure is studied with a fundamental Gaussian *** tuning the wavelength of the fundamental wave,the second harmonic varies from the Laguerre-Gaussian beam(topological charge l_(c)=1)to the higher-order Hermite-Gaussian beam and Laguerre-Gaussian again(l_(c)=−1).This effect is caused by the wavelength-dependent phase delays introduced by the four-grating *** study contributes to a deeper understanding of nonlinear wave interactions in 3D nonlinear photonic *** also offers new possibilities for special beam generation at new frequencies and their control.

关键词： quasi-phase matching nonlinear photonic crystal second harmonic generation nonlinear beam shaping

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红树林湿地土壤CH_4产生率及其土壤理化因素影响的研究

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土壤学报 2000年第1期37卷 77-84页

作者：叶勇卢昌义林鹏谭凤仪黄玉山宁波大学海洋生物工程重点实验室教育部海洋生态环境开放研究实验室厦门361005 厦门大学生物学系厦门361005 教育部海洋生态环境开放研究实验室厦门大学生物学系香港城市大学生物与化学系

本文对海南东寨港和厦门西港的两个红树林（白骨壤群落）的土壤ＣＨ４产生率及其土壤理化因子的影响进行了研究。海南红树林和厦门红树林的土壤ＣＨ４产生率平均值分别为３．５９和１１．５９ｎｇ／ｇｄ，高于海岸光滩的值（１．６２... 详细信息

本文对海南东寨港和厦门西港的两个红树林（白骨壤群落）的土壤ＣＨ４产生率及其土壤理化因子的影响进行了研究。海南红树林和厦门红树林的土壤ＣＨ４产生率平均值分别为３．５９和１１．５９ｎｇ／ｇｄ，高于海岸光滩的值（１．６２ｎｇ／ｇｄ）而低于红树林伐迹地的值（４８．９６ｎｇ／ｇｄ），说明红树林植被对海岸湿地ＣＨ４的产生有促进作用，且这种促进作用主要是通过根系腐解来实现的。相隔约５个纬度的两个红树林的土壤ＣＨ４产生率均表现为暖季较高而冷季较低的季节变化模式。通过土壤理化因子与土壤ＣＨ４产生率的多元线性回归分析，我们得出土壤含水量、有机质、Ｃａ２＋、Ｍｇ２＋和ＳＯ４２－对海南红树林土壤ＣＨ４产生率有影响，而厦门红树林土壤ＣＨ４产生率的主要影响因素是土壤含水量、全Ｎ和Ｃｌ／ＳＯ４２－。

关键词：红树林土壤理化因子甲烷湿地

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Metal removal studied by a laboratory scale immobilized microalgal reactor

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Journal of Environmental Sciences 1998年第4期10卷 91-95页

作者： Arthur Lau yuk shan wong Zhang Tong Nora F.Y.Tam Research Center/Biology Department Hong Kong University of Science and TechnologyClearwater RoadKowloonH.K. CEDRC Beijing 100028China Department of Biology and Chemistry City University of Hong KongKowloonH.K.

A laboratory scale algal column reactor packed with 75 ml alginate algal beads was used to treat 30 mg/L Cu and Ni with a HRT of 30 minutes. At the end of loading 4L metal solution, over 97% of Cu and 91% of Ni were removed from the wastewater with a final residual of 1.76 mg/L Cu and 8.8 mg/L Ni. Up flow was preferred to down flow in maintaining a constant flow rate and hence HRT. Amount of metal recovered during regeneration depended on concentration and nature of regenerant used. Dilute acid was a better regenerant than calcium in terms of metal recovered (90%) and volume needed for regeneration. The consistency in the metal removal performance by the algal column over 10 metal treatment and regeneration cycles suggested that the algal beads can treat Cu or Ni bearing wastewater over 400 times its own volume.

关键词： immobilized microalgal reactor industrial wastewater treatment metal.

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Treadmill exercise in combination with acousto-optic and olfactory stimulation improves cognitive function in APP/PS1 mice through the brain-derived neurotrophic factor-and Cygb-associated signaling pathways

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Neural Regeneration Research 2025年第9期20卷 2706-2726页

作者： Biao Xiao Chaoyang Chu Zhicheng Lin Tianyuan Fang Yuyu Zhou Chuxia Zhang Jianghui shan Shiyu Chen Liping Li Department of Physiology and Pharmacology Health Science CenterNingbo UniversityNingboZhejiang ProvinceChina Ningbo Key Laboratory of Behavioral Neuroscience Health Science CenterNingbo UniversityNingboZhejiang ProvinceChina Key Laboratory of Addiction Research of Zhejiang Province NingboZhejiang ProvinceChina

A reduction in adult neurogenesis is associated with behavioral abnormalities in patients with Alzheimer's ***,enhancing adult neurogenesis represents a promising therapeutic approach for mitigating disease symptoms and ***,nonpharmacological interventions aimed at inducing adult neurogenesis are currently *** individual non-pharmacological interventions,such as aerobic exercise,acousto-optic stimulation,and olfactory stimulation,have shown limited capacity to improve neurogenesis and cognitive function in patients with Alzheimer's disease,the therapeutic effect of a strategy that combines these interventions has not been fully *** this study,we observed an age-dependent decrease in adult neurogenesis and a concurrent increase in amyloid-beta accumulation in the hippocampus of amyloid precursor protein/presenilin 1 mice aged 2-8 *** deposition became evident at 4 months,while neurogenesis declined by 6 months,further deteriorating as the disease ***,following a 4-week multifactor stimulation protocol,which encompassed treadmill running(46 min/d,10 m/min,6 days per week),40 Hz acousto-optic stimulation(1 hour/day,6 days/week),and olfactory stimulation(1 hour/day,6 days/week),we found a significant increase in the number of newborn cells(5'-bromo-2'-deoxyuridine-positive cells),immature neurons(doublecortin-positive cells),newborn immature neurons(5'-bromo-2'-deoxyuridine-positive/doublecortin-positive cells),and newborn astrocytes(5'-bromo-2'-deoxyuridine-positive/glial fibrillary acidic protein-positive cells).Additionally,the amyloid-beta load in the hippocampus *** findings suggest that multifactor stimulation can enhance adult hippocampal neurogenesis and mitigate amyloid-beta neuropathology in amyloid precursor protein/presenilin 1 ***,cognitive abilities were improved,and depressive symptoms were alleviated in amyloid precursor protein/presenilin 1 mice

关键词： acousto-optic stimulation adult neurogenesis Alzheimer's disease amyloid precursor protein/presenilin 1 mice amyloid-beta deposition brain cell apoptosis cognitive impairment depression-like behavior involuntary treadmill exercise olfactory stimulation serum metabolites

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Laparoscopic excision of Meckel's diverticulum in children:What is the current evidence?

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World Journal of Gastroenterology 2014年第41期20卷 15158-15163页

作者： Kin Wai Edwin Chan Kim Hung Lee Hei Yi Vicky wong Siu Yan Bess Tsui Yuen shan wong Kit Yi Kristine Pang Jennifer Wai Cheung Mou yuk Him Tam Division of Paediatric Surgery and Paediatric Urology Department of SurgeryThe Prince of Wales HospitalThe Chinese University of Hong Kong

Complications aroused from Meckel’s diverticulum tend to developed in children. Children presented with abdominal pain, intestinal obstruction, intussusception or gastrointestinal bleeding may actually suffered from complicated Meckel’s diverticulum. With the advancement of minimally invasive surgery (MIS) in children, the use of laparoscopy in the diagnosis and subsequent laparoscopic excision of Meckel’s diverticulum has gained popularity. Recently, single incision laparoscopic surgery (SILS) has emerged as a new technique in minimally invasive surgery. This review offers the overview in the development of MIS in the management of children suffered from Meckel’s diverticulum. The current evidence in different laparoscopic techniques, including conventional laparoscopy, SILS, the use of special laparoscopic instruments, intracorporeal diverticulectomy and extracorporeal diverticulectomy in the management of Meckel’s diverticulum in children were revealed.

关键词： Laparoscopy Meckel’ s diverticulum Children

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Using benthic macrofauna to assess environmental quality of four intertidal mudflats in Hong Kong and Shenzhen Coast

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Acta Oceanologica Sinica 2003年第2期22卷 309-319页

作者： CaiLizhe NoraF.Y.Tam TeresaW.Y.wong MaLi GaoYang yuk-shanwong ResearchLabortoryofSEDCofMarineEnvironmentalScience EnivonmentalScienceResearchCenterXiamenUniversityXiamen361005China DepartmentofBiologyandChermistryandCenterforCoastalPollutionControl CityUniversityofHongKongHKSARChina

Intertidal zone is a significant wetland between land and ocean. It plays an important rolein maintaining local ecological balance. Both Mai Po and Futian intertidal mudflats are located in Shenzhen Bay and are important 'refueling' point along the East Asian/Australian flyway of migratory birds. The environmental quality of Mai Po and Futian mudflats have aroused great concern due to rapid economic developments in Hong Kong and Shenzhen in recent decades. Macroinfauna of Mai Po and Futian mudflats was investigated in December 2000 and the faunal data were used to assess their environmental quality. Two other mudflats, namely Ma Wan Typhoon Shelter (a more disturbed area) and Luk Keng intertidal mudflat (a place with relatively less human disturbance), were also sampled for macroinfauna and used as reference mudflats. shannon - Weaver species diversity index (Isd), biotic coefficient (Cb) and macrofaunal pollution index (Imp) of the macrofauna community on four intertidal mudflats were used to determine their environmental quality. The results showed that Luk Keng intertidal mudflat was unpolluted, Mai Po and Futian mudflats were slightly polluted, and Ma Wan was moderately polluted. The pollution in Ma Wan Typhoon Shelter mainly came from various types of rubbish and fishing boats that disturbed the sediment, while pollution sources in Mai Po and Futian mudflats were discharges of industrial water, municipal sewage and from nearby rivers.

关键词： Biotic index macrofauna intertidal mudflat environmental quality

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Voltage-gated K^+channels promote BT-474 breast cancer cell migration

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Chinese Journal of Cancer Research 2018年第6期30卷 613-622页

作者： Louis WC Chow Ka-Shun Cheng Kar-Lok wong yuk-Man Leung State Key Laboratory of Quality Research in Chinese Medicines Macao University of Science and TechnologyTaipaMacao 999078China UNIMED Medical Institute Hong Kong 999077China Organisation for Oncology and Translational Research Hong Kong 999077China Department of Anesthesiology China Medical University HospitalTaiehung 40447TaiwanChina Department of Anesthesiology the Qingdao University Yuhuangding HospitalYantai 264000China Department of Physiology China Medical UniversityTaichung 40402TaiwanChina

Objective: A variety of ion channels have been implicated in breast cancer proliferation and *** K+(Kv) channels not only cause repolarization in excitable cells,but are also involved in multiple cellular functions in non-excitable *** this study we investigated the role of Kv channels in migration of BT474 breast cancer ***: Transwell technique was used to separate migratory cells from non-migratory ones and these two groups of cells were subject to electrophysiological examinations and microfluorimetric measurements for cytosolic *** migration was examined in the absence or presence of Kv channel ***: When compared with non-migratory cells,migratory cells had much higher Kv current densities,but rather unexpectedly,more depolarized membrane potential and reduced *** transcriptasepolymerase chain reaction(RT-PCR) analysis revealed the presence of Kv1.1,Kv1.3,Kv1.5,Kv2.1,Kv3.3,Kv3.4 and Kv4.3 *** migration was markedly inhibited by tetraethylammonium(TEA),a delayed rectifier Kv channel blocker,but not by 4-aminopyridine,an A-type Kv channel ***: Taken together,our results show that increased Kv channel expression played a role in BT474 cell migration,and Kv channels could be considered as biomarkers or potential therapeutic targets for breast cancer *** mechanism(s) by which Kv channels enhanced migration appeared unrelated to membrane hyperpolarization and Cainflux.

关键词： Breast cancer Kv channels migration biomarkers

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香港维多利亚港码头的附着生物群落

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海洋学报 1999年第2期21卷 86-92页

作者：黄玉山黄宗国刘培生刘文华香港科技大学研究中心国家海洋局第三海洋研究所厦门361005

香港维多利港自东至西6座码头的附着生物群落较旺盛，物种多样性比较丰富（183种），其中还有一些外来物种．各湖区的群落结构差别很大．高潮区以滨螺（Littorinabrevicula等3种）-笠贝（Cellanatoreuma等）为标志；中潮区是笠藤壶（Tet... 详细信息

香港维多利港自东至西6座码头的附着生物群落较旺盛，物种多样性比较丰富（183种），其中还有一些外来物种．各湖区的群落结构差别很大．高潮区以滨螺（Littorinabrevicula等3种）-笠贝（Cellanatoreuma等）为标志；中潮区是笠藤壶（Tetraclitaspp．）-牡蛎（Saccostreaechinata）带；低潮区是翡翠贻贝-瘤海鞘-海绵和网纹藤壶带．流急、浪大是群落较旺盛发展主要因子．

关键词：香港维多利亚港附着生物群落滨螺笠贝牡蛎

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