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A novel method to collect sperm from brood parasitic cuckoos:Urodeum stimulation(UroS)method

Avian Research 2023年第2期14卷 298-303页

作者： Heesoo Lee Hae-Ni kim Jun-Seo Go Myeong-Chan Cha Seongho Yun Sue-Jeong Jin Jin-Won Lee Jeong-Chil Yoo Korea Institute of Ornithology Kyung Hee UniversitySeoul02447Republic of Korea Department of Biology Kyung Hee UniversitySeoul02447Republic of Korea

Sperm competition has been studied in numerous species as a representative example of postcopulatory sexual selection,where sampling sperm from male is the most basic and important *** collection can be tricky in birds,however,because unlike mammals,the genitals of birds are generally latent in the cloacal region and their characteristics vary among *** methods to collect sperm from different birds have been tested,such as cloacal massage,feces collection,and electro-stimulation,but their applicability varies depending on *** this study,we introduced the urodeum stimulation method(UroS method)to collect sperm from Cuculus cuckoos,such as the Common Cuckoo(***).These species are expected to have interesting patterns of pair bonding and sperm competition because of their unique breeding strategy called brood parasitism;however,it remains *** this study,we described the application of our new method to expel semen from male common cuckoos,measured the volume of semen collected,checked the presence of sperm in the semen sample,and finally estimated its success rate among 82 *** were successfully collected from 76 cuckoos(approximately 93%)and the colors and volumes of the samples were very *** was present in 43 of these samples(57%),showing a sperm observation rate approximately twice as high as that of the conventional cloacal massage *** believe that this novel method will contribute to a better understanding of postcopulatory sexual selection in avian brood parasites and facilitate the process of sperm collection and artificial insemination in other medium-sized birds.

关键词： Brood parasitism Cuculus cuckoos Semen collection Sexual selection Sperm competition

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Long-term treatment outcomes of clevudine in antiviral-naive patients with chronic hepatitis B

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World Journal of Gastroenterology 2012年第47期18卷 6943-6950页

作者： Suk Bae kim Il Han Song Young Min kim Ran Noh Ha Yan Kang Hyang Ie Lee Hyeon Yoong Yang An Na kim Hee Bok Chae Sae Hwan Lee Hong Soo kim Tae Hee Lee Young Woo Kang Eaum Seok Lee Seok Hyun kim Byung Seok Lee Heon Young Lee Department of Internal Medicine Dankook University College of MedicineCheonan 330-715South Korea Department of Internal Medicine Eulji University College of MedicineDaejeon 302-779South Korea Department of Internal Medicine Chungbuk University College of MedicineCheongju 362-711South Korea Department of Internal Medicine Soonchunhyang University College of MedicineCheonan 330-090South Korea Department of Internal Medicine Konyang University College of MedicineDaejeon 371-718South Korea Department of Internal Medicine Chungnam University College of MedicineDaejeon 301-721South Korea

AIM:To evaluate the treatment outcomes of clevudine compared with entecavir in antiviral-naive patients with chronic hepatitis B(CHB).METHODS:We retrospectively analyzed the clinical data of CHB patients treated with clevudine 30 mg/d and compared their clinical outcomes with patients treated with entecavir 0.5 mg/*** biochemical response,as assessed by serum alanine aminotransferase(ALT) activity,virologic response,as assessed by serum hepatitis B virus DNA(HBV DNA) titer,serologic response,as assessed by hepatitis B e antigen(HBeAg) status,and virologic breakthrough with genotypic mutations were ***:Two-hundred and fifty-four patients [clevudine(n = 118) vs entecavir(n = 136)] were *** clevudine-treated patients,the cumulative rates of serum ALT normalization were 83.9% at week 48 and 91.5% at week 96(80.9% and 91.2% in the entecavir group,respectively),the mean titer changes in serum HBV DNA were-6.03 and-6.55 log 10 copies/mL(-6.35 and-6.86 log 10 copies/mL,respectively,in the entecavir group),and the cumulative non-detection rates of serum HBV DNA were 72.6% and 83.1%(74.4% and 83.8%,respectively,in the entecavir group).These results were similar to those of entecavir-treated *** cumulative rates of HBeAg seroconversion were 21.8% at week 48 and 25.0% at week 96 in patients treated with clevudine,which was similar to patients treated with entecavir(22.8% and 27.7%,respectively).The virologic breakthrough in the clevudine group occurred in 9(7.6%) patients at weeks 48 and 15(12.7%) patients at week 96,which primarily corresponded to genotypic mutations of rtM204I and/or *** was no virologic breakthrough in the entecavir ***:In antiviral-naive CHB patients,longterm treatment outcomes of clevudine were not inferior to those of entecavir,except for virologic breakthrough.

关键词： Chronic hepatitis B Hepatitis B virus Clevudine Entecavir Treatment outcomes

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Carbon and nitrogen dynamics in a Pinus densiflora forest with low and high stand densities

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Journal of Plant Ecology 2013年第5期6卷 368-379页

作者： Nam Jin Noh Choonsig kim Sang Won Bae Woo Kyun Lee Tae Kyung Yoon Hiroyuki Muraoka Yowhan Son Division of Environmental Science and Ecological Engineering Korea UniversitySeoul 136-713Republic of Korea River Basin Research Center Gifu UniversityGifu 501-1193Japan Department of Forest Resources Gyeongnam National University of Science and TechnologyJinju 660-758Republic of Korea Department of Forest Conservation Korea Forest Research InstituteSeoul 130-712Republic of Korea

Aims Understanding carbon(C)and nitrogen(N)dynamics and their dependence on the stand density of an even-aged,mature forest provides knowledge that is important for forest *** study investigated the differences in ecosystem total C and N storage and flux between a low-density stand(LD)and a high-density stand(HD)and examined the effects of stand density on aboveground net primary productivity(ANPP),total belowground C allocation(TBCA)and net ecosystem production(NEP)in a naturally regenerated,65-to 75-year-old Pinus densiflora *** *** LD(450 trees ha^(−1))and HD(842 trees ha^(−1))were established in an even-aged,mature *** forest in September *** forest had been naturally regenerated following harvesting,and the stand density was naturally maintained without any artificial management such as *** diameter at breast height(DBH≥5.0cm)of all live stems within the stands was measured yearly from 2007 to *** compare C and N storage and fluxes in LD and HD,C and N pools in aboveground and belowground biomass,the forest floor,coarse woody debris(CWD)and soil;soil CO_(2) efflux(R_(S));autotrophic respiration(R_(A));litter production;and soil N availability were ***,ANPP,TBCA and NEP were estimated from plot-based measurement *** Findings Ecosystem C(Mg C ha^(−1))and N(Mg N ha^(−1))storage was,respectively,173.0±7.3(mean±SE)and 4.69±0.30 for LD and 162±11.8 and 4.08±0.18 for *** were no significant differences in C and N storage in the ecosystem components,except for soils,between the two *** contrast,there were significant differences in aboveground ANPP and TBCA between the two stands(P<0.05).Litterfall,biomass increment and R_(S) were major C flux components with values of,respectively,3.89,3.74 and 9.07 Mg C ha^(−1) year^(−1) in LD and 3.15,2.94 and 7.06 Mg C ha^(−1) year^(−1) in ***-based NEP(Mg C ha^(−1) year^(−1))was 4.18 in LD and 5.50 in *** the even-aged,mature P

关键词： aboveground net primary productivity net ecosystem production Japanese red pine stand density total belowground carbon allocation

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To Give Is to Receive

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China's Foreign Trade 2007年第20期 30-33页

作者： kim Su Kyng

On June 21,1962,the Korea Trade- Investment Promotion Agency(KO- TRA)was established to promote trade and investment for the South Korean government and increased world coop- eration. We were lucky to interview Kwag B... 详细信息

关键词：韩国商业投资中国贸易合作

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Ternary layered double hydroxide oxygen evolution reaction electrocatalyst for anion exchange membrane alkaline seawater electrolysis

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Journal of Energy Chemistry 2022年第12期75卷 127-134,I0004页

作者： Yoo Sei Park Jae-Yeop Jeong Myeong Je Jang Chae-Yeon Kwon Geul Han kim Jaehoon Jeong Ji-hoon Lee Jooyoung Lee Sung Mook Choi Department of Hydrogen Energy Materials Surface&Nano Materials DivisionKorea Institute of Materials Science(KIMS)Changwon 51508Republic of Korea Department of Advanced Material Engineering Chungbuk National University1 Chungdae-roSeowon-guCheongjuChungbuk 28644Republic of Korea Department of Chemical Engineering University of WaterlooWaterlooOntario N2L 3G1 Canada School of Materials Science and Engineering Gyeongsang National UniversityJinju 52828Republic of Korea Department of Materials Science and Engineering Pusan National UniversityBusan 46241Republic of Korea Energy Industry Support Center Daegu Mechatronics&Materials InstituteDaegu 42704Republic of Korea Advanced Materials Engineering University of Science and Technology(UST)Yuseong-guDaejeon 34113Republic of Korea

Anion exchange membrane(AEM)water electrolyzers are promising energy devices for the production of clean hydrogen from ***,the lack of active and robust electrocatalysts for the oxygen evolution reaction(OER)severely impedes the development of this *** this study,a ternary layered double hydroxide(LDH)OER electrocatalyst(NiFeCo-LDH)is developed for high-performance AEM alkaline seawater *** AEM alkaline seawater electrolyzer catalyzed by the NiFeCo LDH shows high seawater electrolysis performance(0.84 A/cm^(2)at 1.7 Vcell)and high hydrogen production efficiency(77.6%at 0.5 A/cm^(2)),thus outperforming an electrolyzer catalyzed by a benchmark IrO_(2)*** NiFeCo-LDH electrocatalyst greatly improves the kinetics of the AEM alkaline seawater electrolyzer,consequently reducing its activation loss and leading to high *** on the results,this NiFeCo-LDH-catalyzed AEM alkaline seawater electrolyzer can likely surpass the energy conversion targets of the US Department of Energy.

关键词： Anion exchange membranes water electrolysis Oxygen evolution reactions Alkaline seawater electrolysis Hydrogen production

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Uterine biology in pigs and sheep

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Journal of Animal Science and Biotechnology 2012年第3期3卷 109-129页

作者： Fuller W Bazer Gwonhwa Song Jinyoung kim Kathrin A Dunlap Michael Carey Satterfield Gregory A Johnson Robert C Burghardt Guoyao Wu Department of Animal Science 442D Kleberg Center 2471 TAMU Texas A&M University College Station TX 77843-2471 USA Department of Veterinary Integrated Biosciences Texas A&M University College Station TX 77843-2471 USA

There is a dialogue between the developing conceptus （embryo-fetus and associated placental membranes） and maternal uterus which must be established during the peri-implantation period for pregnancy recognition signaling, implantation, regulation of gene expression by uterine epithelial and stromal cells, placentation and exchange of nutrients and gases. The uterus provide a microenvironment in which molecules secreted by uterine epithelia or transported into the uterine lumen represent histotroph required for growth and development of the conceptus and receptivity of the uterus to implantation. Pregnancy recognition signaling mechanisms sustain the functional lifespan of the corpora lutea （CL） which produce progesterone, the hormone of pregnancy essential for uterine functions that support implantation and placentation required for a successful outcome of pregnancy. It is within the peri-implantation period that most embryonic deaths occur due to deficiencies attributed to uterine functions or failure of the conceptus to develop appropriately, signal pregnancy recognition and/or undergo implantation and placentation. With proper placentation, the fetal fluids and fetal membranes each have unique functions to ensure hematotrophic and histotrophic nutrition in support of growth and development of the fetus. The endocrine status of the pregnant female and her nutritional status are critical for successful establishment and maintenance of pregnancy. This review addresses the complexity of key mechanisms that are characteristic of successful reproduction in sheep and pigs and gaps in knowledge that must be the subject of research in order to enhance fertility and reproductive health of livestock species.

关键词： Genes Growth factors Interferon stimulated Pregnancy Pregnancy recognition Uterus

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A study on the Web intelligence

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潍坊学院学报 2004年第4期4卷 5-8页

作者： Sang-Geun kim Division of Computer Engineering Surlgkyul University #147-2 Anyang-8 Dong Manarlgu Anyang Kyunggi-Do Republic of Korea

This paper surveys important aspects of Web Intelligence (WI). WI explores the fundamental roles as well as practical impacts of Artificial Intelligence (AI) and advanced Information Technology (IT) on the next generation of Web - related products, systens, and activities. As a direction for scientific research and devlopment, WI can be extremely beneficial for the field of Artificial Intelligence in Education (AIED). This paper covers these issues only very briefly. It focuses more on other issues in WI, such as intelligent Web services, and semantic web, and proposes how to use them as basis for tackling new and challenging research problems in AIED.

关键词： Web intelligence Ontology Semantic Web Educational Web services

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Customizable design ofmultiple-biomolecule delivery platform for enhanced osteogenic responses via‘tailored assembly system’

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Bio-Design and Manufacturing 2022年第3期5卷 451-464页

作者： Hyun Lee Min-Kyu Lee Ginam Han Hyoun-Ee kim Juha Song Yuhyeon Na Chang-Bun Yoon SeKwon Oh Tae-Sik Jang Hyun-Do Jung Department of Biomedical-Chemical Engineering Catholic University of KoreaBucheon 14662Republic of Korea Department of Biotechnology The Catholic University of KoreaBucheon 14662Republic of Korea Department of Materials Science and Engineering Seoul National UniversitySeoul 08826Republic of Korea Querrey Simpson Institute for Bioelectronics Northwestern UniversityEvanstonIL 60208USA Biomedical Implant Convergence Research Center Advanced Institutes of Convergence TechnologySuwon 443-270Republic of Korea School of Chemical and Biomedical Engineering Nanyang Technological University70 Nanyang DriveSingapore 637457Singapore Department of Advanced Materials Engineering Korea Polytechnic UniversitySiheung-siGyeonggi-do 15073Republic of Korea Surface R&D Group Korea Institute of Industrial TechnologyIncheon 21999Republic of Korea Department of Materials Science and Engineering Chosun UniversityGwangju 61452Republic of Korea

Porous titanium(Ti)scaffolds have been extensively utilized as bone substitute scaffolds due to their superior biocompatibility and excellent mechanical ***,naturally formed TiO2 on the surface limits fast *** biomolecules have been widely utilized to overcome this issue;however,homogeneous porous Ti scaffolds could not simultaneously deliver multiple biomolecules that have different release *** this study,functionally graded porous Ti scaffolds(FGPTs)with dense inner and porous outer parts were fabricated using a two-body combination and densification *** with growth factor(BMP-2)and antibiotics(TCH)exhibited suitable mechanical properties as bone substituting material and presented good structural *** release of BMP-2 was considerably prolonged,whereas the release of TCH was comparable to that of homogenous porous titanium scaffolds(control group).The osteogenic differentiation obtained using FGPTs was maintained due to the prolonged release of *** antimicrobial properties of these scaffolds were verified using *** in terms of prior release *** addition,various candidates for graded porous Ti scaffolds with altered pore characteristics were presented.

关键词： Functionally graded porous titanium scaffold Tailored assembly system Mechanical tunability Multiplebiomolecule delivery Bone tissue engineering

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Case Study: Hydraulic Model Study for Abandoned Channel Restoration

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Engineering（科研） 2013年第12期5卷 989-996页

作者： Changsung kim Joongu Kang Water Resource Research Department Korea Institute of Construction Technology Goyang Korea

Recently, a paradigm of river restoration is recognized as the importance of flood plan involving abandoned channel. Hence, effort which abandoned channel area by improvement project will become the territory of river area is trying. This study is a part of river restoration project. In this study, hydraulic model experiment and numerical simulation were performed to understand the flow characteristic and bed change for abandoned channel restoration. The target area of the hydraulic model was the midstream of the Hampyeong Stream (stream length: 1.3 km). Horizontal scale was 1/50 and vertical scale was 1/40. For numerical simulation, the FESWMS model was used. Cases of hydraulic and numerical models were frequency flood discharge (50 and 100 years) and channel formation discharge (100 m3/s and 120 m3/s). Flow characteristics were analyzed in fixed condition using hydraulic and numerical models. Bed change on abandoned channel restoration was analyzed on deposition trend using sediment supply from upstream in hydraulic model, and was compared with results of bed shear stress in numerical model. Results velocity profile and bed shear stress of numerical model were similar with trends of measured velocity and deposition of hydraulic model. The results of this study will be applied to restoration design of abandoned channels.

关键词： Abandoned Channel Hydraulic Model RMA2 FESWMS Deposition

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Advertising ：And the Challengers Are...

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China International Business 2007年第5期 42-43页

作者： kim HUNTER GORDON

Focus Media may dominate the industry, but some smaller companies are finding new ways to reach consumers - and are attracting capital to boot

关键词：广告业新兴媒体小公司投资热消费者

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