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One new species and one new record species of Sphaerolaimus(Nematode,Sphaerolaimidae)in offshore wetlands,China

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Journal of Oceanology and Limnology 2021年第2期39卷 683-692页

作者： Peipei YANG Mengdi LIU yuqing guo Fisheries College Jimei UniversityXiamen 361021China

One new species and one new record species of Sphaerolaimus are *** longispiculatus *** characterized by body length 2213–2470µm,amphideal fovea 12%–16%corresponding body diameters in males and 9%–10%corresponding body diameters in females,long slender spicules 2.8–3.8 cloacal body diameters,eight small papilliform precloacal supplements,gubernaculum without apophysis,and tail conico-cylindrical,2.5–3.7 cloacal/anal body diameters *** gracilis is recorded from the first time in the mangroves wetlands,it can be distinguished from the original desceiption by longer spicules(66–71µm vs 56µm)and wider body(a=20.1–21.4 vs 25).

关键词： free-living marine nematodes taxonomy Sphaerolaimus longispiculatus sp.nov.

A new species and a new record of free-living marine nematode of genus Diplolaimelloides(Monhysteridae)from Futian mangrove reservation in Shenzhen,China

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Journal of Oceanology and Limnology 2023年第1期41卷 314-326页

作者： Yuzhen CHEN Huilan ZHU yuqing guo Fisheries College Jimei UniversityXiamen 361021China

A new species and a new record of free-living marine nematode of genus Diplolaimelloides’(Monhysteridae)inhabiting the sediment of mangrove reservation in Shenzhen,China are described and *** contortus *** characterized by the combination of the following characters:ocelli present;four pairs of post-cloacal papillae arranged in(2+2)pattern,two midway on bursa and two near posterior extremities;spicules complicated in shape,twisted and curved at middle portion;gubernaculum wedge-shaped,with distal dorsal ridge well cuticularized,proximal dorsal ridge obscure sleeve-like,proximal end wrap the spicule;vulva located at 52.1%-53.6%of body length;male tail slender,10.0-11.4 times of anal body diameter,and female tail long filiform,13.1-13.6 times of anal body *** delyi Andras sy,1958 is first recorded from China and redescribed in detail,it differs from the original description by Andrassy in 1958 for having larger body size of male,shorter tail,and posterior situation of ***,it is much conform to the redescription to specimens from East Pakistan by Timm in 1966,except for shorter tail in female and absent pre-anal *** are deposited in the Institute of Oceanology,Chinese Academy of Sciences.

关键词： taxonomy Diplolaimelloides contortus sp.nov Diplolaimelloides delyi Andrássy,1958 mangrove nematode China

Two New Free-Living Marine Nematode Species of the Genus Anoplostoma(Anoplostomatidae) from the Mangrove Habitats of Xiamen Bay,East China Sea

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Journal of Ocean University of China 2016年第1期15卷 11-18页

作者： LI Yongxiang guo yuqing Fujian Provincial Key Laboratory of Marine Fishery Resources and Eco-Environment Fisheries CollegeJimei University

Two new species of free-living marine nematode from mangrove habitats in Xiamen Bay are *** tumidum *** characterized by relatively short outer labial setae(0.86–1.00 h.d.),long tail(c 7.2–8.9,c' 8.3–10.5),an instinct swollen distal portion of slender spicule(Sc 94–101 μm),and well developed copulatory bursae without bursal *** *** from all valid species of genus Anoplostoma in copulatory apparatus of males with a distinct swollen distal portion of spicule,and a relatively obvious constriction of *** *** characterized by relatively long outer labial setae(1.11–1.22 h.d.),and tail(c 6.6–8.5,c' 8.6–10.2);elongated spicules with distinct knob-like proximal and pointed distal ends(Sc 46–69 μm);distinct strip-like gubernaculum(length with 11–15μm);well developed copulatory bursae with precloacal papillae and post-cloacal papillae;and a distinct constriction of *** *** similar to *** Bastian,1865,but differs in the reproductive mode of female and the constriction of head.

关键词： free-living marine nematode Anoplostoma mangrove new species East China Sea

Two new free-living nematode species (Comesomatidae) from the mangrove wetlands in Fujian Province, China

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Acta Oceanologica Sinica 2018年第10期37卷 161-167页

作者： guo yuqing CHANG Yu YANG Peipei Fujian Provincial Key Laboratory of Marine Fishery Resources and Eco-environment Fisheries College Jimei University

Two new free-living marine nematode species from the mangrove wetlands of Fujian Province, China are identified and illustrated. Sabatieria conicoseta sp. nov. is characterized by its short conical somatic setae. There are 12-15 tubular pre-cloacal supplements and 12-15/Jm long straight gubernacular apophyses. Dorylaimopsis papilla sp. nov. is characterized by spicules which are 1.5-1.8 a. b. d, long with media cuticularized strip along entire spicules, and have a cephalated proximal end with small hooked. There are 16-18 small papillate precloacal supplements and 37-40 μm long dorso-caudal gubernacular apophyses.

关键词： free-living marine nematode new species Sabatieria Dorylaimopsis mangrove

Local Government Debt Governance in China in the Past 70 Years:Review and Prospect

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China Finance and Economic Review 2019年第4期8卷 49-65页

作者： yuqing guo Jie Mao Department of Finance School of EconomicsNankai UniversityChina Department of Finance and Taxation University of International Business and EconomicsChina

This paper gives an overview of local government debt governance in China in the past 70 years and looks ahead to its strategic prospect in the new era based on a theoretical analysis of debt characteristics in the transition *** this purpose,we divide the past 70 years into fi ve stages:planned regulation,exploration,wide fl uctuations,pilot expansion,and comprehensive transformation,which is a prudent trade-off process between“incentive”and“control”objectives to deal with the strategic fi nancing game of local governments and striving to make debt governance regulated,transparent,and *** the historic changes in social and economic development concepts in the new era,the debt governance mode needs to shift from the conventional GDP-based quantitative governance to performance governance which is oriented towards long-term benefi ts,with a focus on improving the quality and efficiency of debt *** by the new development concepts,debt governance in the new era can continue to unleash reform dividends and promote strategic adjustments at the institutional,structural,mode,and technical levels in an orderly manner,so as to lay a solid foundation for ensuring the security of fi scal operations and the sustainability of local government debt fi nancing.

关键词： local government debt governance mode debt fi nancing

Arsenic methylation by an arsenite S-adenosylmethionine methyltransferase from Spirulina platensis

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Journal of Environmental Sciences 2016年第11期28卷 162-168页

作者： yuqing guo Ximei Xue Yu Yan Yongguan Zhu Guidi Yang Jun Ye Fujian Provincial Key Laboratory of Agroecological Processing and Safety Monitoring College of Life Sciences Fujian Agriculture and Forestry University Key Laboratory of Urban Environment and Health Institute of Urban Environment Chinese Academy of Sciences State Key Laboratory of Urban and Regional Ecology Research Center for Eco-Environmental Sciences Chinese Academy of Sciences

Arsenic-contaminated water is a serious hazard for human health. Plankton plays a critical role in the fate and toxicity of arsenic in water by accumulation and *** platensis（S. platensis）, a typical plankton, is often used as a supplement or feed for pharmacy and aquiculture, and may introduce arsenic into the food chain, resulting in a risk to human health. However, there are few studies about how S. platensis biotransforms arsenic. In this study, we investigated arsenic biotransformation by S. platensis. When exposed to arsenite（As（Ⅲ））, S. platensis accumulated arsenic up to 4.1 mg/kg dry *** exposure to As（Ⅲ）, arsenate（As（Ⅴ）） was the predominant species making up 64% to86% of the total arsenic. Monomethylarsenate（MMA（Ⅴ）） and dimethylarsenate（DMA（Ⅴ））were also detected. An arsenite S-adenosylmethionine methyltransferase from S. platensis（Sp Ars M） was identified and characterized. Sp Ars M showed low identity with other reported Ars M enzymes. The Escherichia coli AW3110 bearing Spars M gene resulted in As（Ⅲ） methylation and conferring resistance to As（Ⅲ）. The in vitro assay showed that Sp Ars M exhibited As（Ⅲ） methylation activity. DMA（Ⅴ） and a small amount of MMA（Ⅴ） were detected in the reaction system within 0.5 hr. A truncated Sp Ars M derivative lacking the last 34 residues still had the ability to methylate As（Ⅲ）. The three single mutants of Sp Ars M（C59S, C186 S, and C238S） abolished the capability of As（Ⅲ） methylation, suggesting the three cysteine residues are involved in catalysis. We propose that Sp Ars M is responsible for As methylation and detoxification of As（Ⅲ） and may contribute to As biogeochemistry.

关键词： Spirulina platensis Arsenic Methylation Methyltransferase

Abundance and distribution of meiofauna in the Chukchi Sea

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Acta Oceanologica Sinica 2014年第6期33卷 90-94页

作者： LIN Rongcheng HUANG Dingyong guo yuqing CHANG Yu CAO Yinkun WANG Jianjia Third Institute of Oceanography State Oceanic Administration Key Laboratory of Marine Fishery Resources and Ecological Environment of Fujian Province Fisheries CollegeJimei University

The metazoan meiofauna in the Chukchi Sea were collected from seven shallow water stations （depths rang- ing 46 to 52 m） and five deep sea stations （depths ranging between 393 and 2 300 m） during the 4th Chinese National Arctic Research Expedition in 2010. The results showed that abundance of meiofauna was higher in shallow water sediments （average of 2445 ind./（10 cm2）） than in deep sea sediments （407.06 ind./（10 cm2））. A UNIANOVA test for difference between the two different regions was highly significant （F=10h 15, p〈***）. Nematodes were numerically dominant, representing （96.6±4.6）% of the total meiofaunal abundance at the shallow water stations and （98.90±1.42）% at deep sea stations. The number of higher taxonomic groups and abundance of meiofauna were higher at Stas CC1, CC4, and R06 near the Bering Strait and the continent, than at the rest of the shallow water and deep sea stations. The primary factors causing the differences were concentrations of nutrients P and Si of bottom seawater （R=0.831, p〈0.003）, followed by depth （R=-0.655, p〈0.05） and sand fractions of sediments （R=0.632, p 〈0.05）. The numbers of meiofauna on the 65 lam and 32 llm sieves were significantly higher than those on the rest of the screens. Differences in numbers of meiofauna retained on screens with different mesh openings were highly significant among all sampling stations （F=31.60, p〈0.01）. The highest numbers of individuals on screens with 32 μm mesh openings were found at deep sea stations. The number of meiofauna in the top 6-1, 1-2, and 2-4 cm segments constituted 84.4% of the total and was significantly higher than those in the bottom 4-6 and 6-10 cm segments （F=15, p〈0.01）.

关键词： Chukchi Sea meiofauna abundance vertical distribution size spectra deep sea

Description of a Marine Nematode Hopperia sinensis sp. nov.(Comesomatidae) from Mangrove Forests of Quanzhou, China, with a Pictorial Key to Hopperia Species

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Journal of Ocean University of China 2015年第6期14卷 1111-1115页

作者： guo yuqing CHANG Yu CHEN Yuzhen LI Yongxiang LIU Aiyuan Fujian Provincial Key Laboratory of Marine Fishery Resources and Eco-Environment Fisheries CollegeJimei University Library Jimei University

A new free-living marine nematode species Hopperia sinensis sp. nov. from mangrove forests of Fujian Province, China, is identified and illustrated. Hopperia sinensis sp. nov. is characterized by its cephalic setae 2.4–2.8 μm long or 17%–20% head diameter, and amphids of 2.25–2.5 turns. Lateral differentiation appears with larger, more irregularly distributed dots behind 3–5 transverse rows of dots posterior to amphid. Buccal cavity is consisted of a shallow and weakly sclerotized cup-shaped portion with strongly sclerotized walls of 18–21 μm deep. There are three sclerotized and size-equally pointed teeth at the junction between the two parts. Spicules of 41–45 μm long are slightly curved with broadband velum and central strips at the proximal end. The gubernacula, with apparent lateral guiding pieces, are formed by one central tubular piece that is weakly sclerotized with 11–16 μm long dorso-caudally directed apophyses. There are 13–14 fine tubular precloacal supplements. Conico-cylindrical tail gradually tapers till pointed tail tip. Female is similar to male, but have a longer body and tail. Ovaries are opposed and outstretched, with anterior ovary to the left and posterior ovary to the right of the intestine. A pictorial key to all the valid known species in genus Hopperia is given.

关键词： free-living marine nematode new species Hopperia East China Sea mangrove

The Controllable Design of Catalyst Inks to Enhance PEMFC Performance:A Review

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Electrochemical Energy Reviews 2021年第1期4卷 67-100页

作者： yuqing guo Fengwen Pan Wenmiao Chen Zhiqiang Ding Daijun Yang Bing Li Pingwen Ming Cunman Zhang School of Automotive Studies and Clean Energy Automotive Engineering Center Tongji UniversityShanghai 201804China WeiChai Power Co. Ltd.WeifangShandong 261016China

Typical catalyst inks in proton exchange membrane fuel cells(PEMFCs)are composed of a catalyst,its support,an ionomer and a solvent and are used with solution processing approaches to manufacture conventional catalyst layers(CLs).Because of this,catalyst ink formulation and deposition processes are closely related to CL structure and ***,catalyst inks with ideal rheology and optimized electrochemical performances remain lacking in the large-scale application of *** address this,this review will summarize current progress in the formulation,characterization,modeling and deposition of catalyst *** addition,this review will highlight recent advancements in catalyst ink materials and discuss corresponding complex *** review will also present various catalyst ink dispersion methods with insights into their stability and introduce the application of small-angle scattering and cryogenic transmission electron microscopy(cryo-TEM)technologies in the characterization of catalyst ink ***,recent studies in the kinetic modeling and deposition of catalyst inks will be analyzed.

关键词： Catalyst ink Ink formulation Ink modeling Ink deposition process Proton exchange membrane fuel cell Catalyst layer