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84篇 您的检索式:作者名="Taiki"
    题名 作者 年代 出处 被引量
1模拟大气氮沉降对中国森林生态系统影响的研究进展显示文摘人类活动加剧了活性氮的生产和排放,并导致氮沉降日益增加并全球化。目前,人类活动对全球氮循环的干扰已经超出了地球系统安全运行的界限。中国已成为全球氮沉降的高发区域,高氮沉降已经威胁到生态系统的健康和安全,并成为生态文明建设过程中亟待理清和解决的热点问题。对国际上和中国森林生态系统模拟氮沉降研究的概况进行了综述,并从生物学和非生物学两大过程重点阐述模拟氮沉降增加对中国主要森林生态系统影响的研究进展。中国自2000年以后才开始重视大气氮沉降产生的生态环境问题,中国科学院华南植物园在国内森林生态系统模拟氮沉降试验研究上做出了开创性的贡献。模拟氮沉降研究表明,持续高氮输入将会显著改变森林生态系统的结构和功能,并威胁生态系统的健康发展,特别是处于氮沉降热点区域的中国中南部。森林生态系统的氮沉降效应依赖于系统的氮状态、土地利用历史、气候特征、林型和林龄等。最后,对未来的研究提出了一些建议,包括加强长期跟踪研究和不同气候带站点之间的联网研究,特别是在森林生态系统对长期氮沉降响应与适应的过程机制、地下碳氮吸存潜力研究、以及与其他全球变化因子的耦合研究等方面,以期为森林生态系统的可持续发展提供理论基础和管理依据。鲁显楷 莫江明 张炜 毛庆功 刘荣臻 王聪 王森浩 郑棉海 MORI Taiki 毛晋花 张勇群 王玉芳 黄娟 2019热带亚热带植物学报2019,27,5:58
2Retrospective cohort study Lower incidence of complications in endoscopic nasobiliary drainage for hilar cholangiocarcinoma显示文摘AIM:To identify the most effective endoscopic biliary drainage technique for patients with hilar cholangiocarcinoma.METHODS:In total,118 patients with hilar cholangiocarcinoma underwent endoscopic management[endoscopic nasobiliary drainage(ENBD)or endoscopic biliary stenting]as a temporary drainage in our institution between 2009 and 2014.We retrospectively evaluated all complications from initial endoscopic drainage to surgery or palliative treatment.The risk factors for biliary reintervention,post-endoscopic retrograde cholangiopancreatography(post-ERCP)pancreatitis,and percutaneous transhepatic biliary drainage(PTBD)were also analyzed using patient-and procedure-related characteristics.The risk factors for bilateral drainage were examined in a subgroup analysis of patients who underwent initial unilateral drainage.RESULTS:In total,137 complications were observed in92(78%)patients.Biliary reintervention was required in 83(70%)patients.ENBD was significantly associated with a low risk of biliary reintervention[odds ratio(OR)=0.26,95%CI:0.08-0.76,P=0.012].Post-ERCP pancreatitis was observed in 19(16%)patients.An absence of endoscopic sphincterotomy was significantly associated with post-ERCP pancreatitis(OR=3.46,95%CI:1.19-10.87,P=0.023).PTBD was required in 16(14%)patients,and Bismuth type III or IV cholangiocarcinoma was a significant risk factor(OR=7.88,95%CI:1.33-155.0,P=0.010).Of 102 patients with initial unilateral drainage,49(48%)required bilateral drainage.Endoscopic sphincterotomy(OR=3.24,95%CI:1.27-8.78,P=0.004)and Bismuth II,III,or IV cholangiocarcinoma(OR=34.69,95%CI:4.88-736.7,P<0.001)were significant risk factors for bilateral drainage.CONCLUSION:The endoscopic management of hilar cholangiocarcinoma is challenging.ENBD should be selected as a temporary drainage method because of its low risk of complications.Kazumichi Kawakubo Hiroshi Kawakami Masaki Kuwatani Shin Haba Taiki Kudo Yoko A Taya Shuhei Kawahata Yoshimasa Kubota Kimitoshi Kubo Kazunori Eto Nobuyuki Ehira Hiroaki Yamato Manabu Onodera Naoya Sakamoto 2016World Journal of Gastrointestinal Endoscopy2016,8,9:26
3T1ρ/T2 mapping and histopathology of degenerative cartilage in advanced knee osteoarthritis显示文摘AIM To investigate whether normal thickness cartilage in osteoarthritic knees demonstrate depletion of proteoglycan or collagen content compared to healthy knees.METHODS Magnetic resonance(MR) images were acquired from5 subjects scheduled for total knee arthroplasty(TKA)(mean age 70 years) and 20 young healthy control subjects without knee pain(mean age 28.9 years). MR images of T1ρ mapping, T2 mapping, and fat suppressed proton-density weighted sequences were obtained.Following TKA each condyle was divided into 4 parts(distal medial, posterior medial, distal lateral, posterior lateral) for cartilage analysis. Twenty specimens(bone and cartilage blocks) were examined. For each joint,the degree and extent of cartilage destruction was determined using the Osteoarthritis Research Society International cartilage histopathology assessment system.In magnetic resonance imaging(MRI) analysis, 2 readers performed cartilage segmentation for T1ρ/T2 values and cartilage thickness measurement.RESULTS Eleven areas in MRI including normal or near normal cartilage thickness were selected. The corresponding histopathological sections demonstrated mild to moderate osteoarthritis(OA). There was no significant difference in cartilage thickness in MRI between control and advanced OA samples [medial distal condyle, P = 0.461;medial posterior condyle(MPC), P = 0.352; lateral distal condyle, P = 0.654; lateral posterior condyle, P = 0.550],suggesting arthritic specimens were morphologically similar to normal or early staged degenerative cartilage.Cartilage T2 and T1ρ values from the MPC were significantly higher among the patients with advanced OA(P= 0.043). For remaining condylar samples there was no statistical difference in T2 and T1ρ values between cases and controls but there was a trend towards higher values in advanced OA patients. CONCLUSION Though cartilage is morphologically normal or near normal, degenerative changes exist in advanced OA patients. These changes can be detected with T2 and T1ρ MRI techniques.Benjamin S Kester Philip M Carpenter Hon J Yu Taiki Nozaki Yasuhito Kaneko Hiroshi Yoshioka Ran Schwarzkopf 2017World Journal of Orthopedics2017,8,4:12
4Three cases of retroperitoneal schwannoma diagnosed by EUS-FNA显示文摘Schwannomas are peripheral nerve tumors that are typically solitary and benign.Their diagnosis is largely based on surgically resected specimens.Recently,a number of case reports have indicated that retroperitoneal schwannomas could be diagnosed with endoscopic ultrasound-guided fine-needle aspiration (EUS-FNA).We report the diagnosis of three cases of schwannoma using EUS-FNA.Subjects were two males and one female,ages 22,40,and 46 years,respectively,all of whom were symptom-free.Imaging findings showed well-circumscribed round tumors.However,as the tumors could not be diagnosed using these findings alone,EUS-FNA was performed.Hematoxylin-eosin staining of the resulting tissue fragments revealed bland spindle cells with nuclear palisading.There was no disparity in nuclear sizes.Immunostaining revealed S-100 protein positivity and all cases were diagnosed as schwannomas.Ki-67 indexes were 3%-15%,2%-3%,and 3%,respectively.No case showed any signs of malignancy.As most schwannomas are benign tumors and seldom become malignant,we observed these patients without therapy.All tumors demonstrated no enlargement and no change in characteristics.Schwannomas are almost always benign and can be observed following diagnosis by EUS-FNA.Taiki Kudo Hiroshi Kawakami Masaki Kuwatani Nobuyuki Ehira Hiroaki Yamato Kazunori Eto Kanako Kubota Masahiro Asaka 2011World Journal of Gastroenterology2011,17,29:8
5New scoring system in assessment of Hoffa's fat pad synovitis: A comparative study with established scoring systems显示文摘AIM To investigate the reliability of the established and new scoring methods for Hoffa's fat pad synovitis using magnetic resonance imaging(MRI).METHODS A total of 139 knees of 115 patients who underwent MRI of the knee with and without gadolinium contrast were enrolled in this study. Proton density(PD)-weighted, PD-weighted fat-suppressed(PD-FS), and postcontrast T1-weighted fat-suppressed(T1CE) images were used for evaluation. Using contrast and noncontrast images, our grading method for synovitis was performed to measure synovial thickness and signal intensity changes of the fat pad [Synovial membrane(SM) score], which was compared with the established methods,including MRI Osteoarthritis Knee Score(MOAKS), parapatellar synovitis score,Whole-Organ Magnetic Resonance Imaging Score(WORMS), and suprapatellar effusion diameter. Intraclass correlation coefficients(ICC) for intra and interobserver reproducibility and Spearman correlation coefficients(r) were calculated for the parapatellar synovitis score and each scoring method.RESULTS All of the scores presented substantial to almost perfect intrareliability. Among three readers, effusion diameter had substantial to almost perfect interreliability(ICC = 0.68-0.81) and WORMS had substantial interreliability(ICC = 0.61-0.70).For two out of three readers, there was substantial interreliability for the thickness score in T1CE(ICC = 0.55-0.69), SM scores in T1CE(ICC = 0.56-0.78)and PD-FS(ICC = 0.51-0.79), and parapatellar synovitis score in T1CE(ICC =0.53-0.72). The parapatellar synovitis score was significantly correlated with the thickness score in T1CE(r = 0.70) and the SM score in T1CE(r = 0.81) and PD-FS(r = 0.65).CONCLUSION The newly proposed quantitative thickness score on T1CE and the semiquantitative SM score on T1CE and PD-FS can be useful for Hoffa's fat pad synovitis.Shigeo Hagiwara Albert Yang Shoichiro Takao Yasuhito Kaneko Taiki Nozaki Hiroshi Yoshioka 2018World Journal of Radiology2018,10,11:3
6Influence of the safety and diagnostic accuracy of preoperative endoscopic ultrasound-guided fine-needle aspiration for resectable pancreatic cancer on clinical performance显示文摘AIM:To evaluate the safety and diagnostic accuracy of endoscopic ultrasound-guided fine-needle aspiration(EUS-FNA)in a cohort of pancreatic cancer patients.METHODS:Of 213 patients with pancreatic cancer evaluated between April 2007 and August 2011,82were thought to have resectable pancreatic cancer on the basis of cross-sectional imaging findings.Of these,54 underwent EUS-FNA before surgery(FNA+group)and 28 underwent surgery without preoperative EUSFNA(FNA-group).RESULTS:All 54 lesions were visible on EUS,and all54 attempts at FNA were technically successful.The diagnostic accuracy according to cytology and histology findings was 98.1%(53/54)and 77.8%(42/54),respectively,and the total accuracy was 98.1%(53/54).One patient developed mild pancreatitis after EUS-FNA but was successfully treated by conservative therapy.No severe complications occurred after EUS-FNA.In the FNA+and FNA-groups,the median relapse-free survival(RFS)was 742 and 265 d,respectively(P=0.0099),and the median overall survival(OS)was1042 and 557 d,respectively(P=0.0071).RFS and OS were therefore not inferior in the FNA+group.These data indicate that the use of EUS-FNA did not influence RFS or OS,nor did it increase the risk of peritoneal recurrence.CONCLUSION:In patients with resectable pancreatic cancer,preoperative EUS-FNA is a safe and accurate diagnostic method.Taiki Kudo Hiroshi Kawakami Masaki Kuwatani Kazunori Eto Shuhei Kawahata Yoko Abe Manabu Onodera Nobuyuki Ehira Hiroaki Yamato Shin Haba Kazumichi Kawakubo Naoya Sakamoto 2014World Journal of Gastroenterology2014,20,13:2
7Consumption of n-3 Fatty Acids and Fish Reduces Risk of Hepatocellular Carcinoma显示文摘Norie Sawada Manami Inoue Motoki Iwasaki Shizuka Sasazuki Taichi Shimazu Taiki Yamaji Ribeka Takachi Yasuhito Tanaka Masashi Mizokami Shoichiro Tsugane 2012Gastroenterology2012,,7:2
8Exploring the hepatitis C virus genome using single molecule realtime sequencing显示文摘Single molecular real-time(SMRT)sequencing,also called third-generation sequencing,is a novel sequencing technique capable of generating extremely long contiguous sequence reads.While conventional short-read sequencing cannot evaluate the linkage of nucleotide substitutions distant from one another,SMRT sequencing can directly demonstrate linkage of nucleotide changes over a span of more than 20 kbp,and thus can be applied to directly examine the haplotypes of viruses or bacteria whose genome structures are changing in real time.In addition,an error correction method(circular consensus sequencing)has been established and repeated sequencing of a single-molecule DNA template can result in extremely high accuracy.The advantages of long read sequencing enable accurate determination of the haplotypes of individual viral clones.SMRT sequencing has been applied in various studies of viral genomes including determination of the full-length contiguous genome sequence of hepatitis C virus(HCV),targeted deep sequencing of the HCV NS5A gene,and assessment of heterogeneity among viral populations.Recently,the emergence of multi-drug resistant HCV viruses has become a significant clinical issue and has been also demonstrated using SMRT sequencing.In this review,we introduce the novel third-generation PacBio RSII/Sequel systems,compare them with conventional next-generation sequencers,and summarize previous studies in which SMRT sequencing technology has been applied for HCV genome analysis.We also refer to another long-read sequencing platform,nanopore sequencing technology,and discuss the advantages,limitations and future perspectives in using these thirdgeneration sequencers for HCV genome analysis.Haruhiko Takeda Taiki Yamashita Yoshihide Ueda Akihiro Sekine 2019World Journal of Gastroenterology2019,25,32:2
9Water-assisted self-sustained burning of metallic single-walled carbon nanotubes for scalable transistor fabrication显示文摘Although aligned arrays of semiconducting single-walled carbon nanotubes(s-SWNTs) are promising for use in next-generation electronics owing to theirultrathin bodies and ideal electrical properties, even a small portion of metallic(m-) counterparts causes excessive leakage in field-effect transistors (FETs).To fully exploit the benefits of s-SWNTs for use in large-scale systems, it isnecessary to completely eliminate m-SWNTs from as-grown SWNT arrays andthereby obtain purely semiconducting large-area arrays, wherein numerousFETs can be flexibly built. In this study, we performed electrical burning ofm-SWNTs assisted by water vapor and polymer coating to eliminate m-SWNTsover a long length for the scalable fabrication of transistors from the remainings-SWNT arrays. During the electrical-breakdown process, the combination ofwater vapor and the polymer coating significantly enhanced the burning ofthe SWNTs, resulting in a self-sustained reaction along the nanotube axis. Wefound that m-SWNT segments partially remaining on the anode side resultedfrom one-way burning from the initial breakdown position, where Joule-heating-induced oxidation first occurred. The s-SWNT-enriched arrays obtained wereused to fabricate multiple FETs with a high on-off current ratio. The resultsindicate the advantages of this approach over conventional electrical breakdownfor the large-scale purification of s-SWNTs.Keigo Otsuka Taiki Inoue Yuki Shimomura Shohei Chiashi Shigeo Maruyama 2017Nano Research2017,10,9:2
10The responses of carbon-and nitrogen-acquiring enzymes to nitrogen and phosphorus additions in two plantations in southern China显示文摘In tropical plantations,nutrients such as nitrogen(N)or phosphorus(P)are often applied as management practices.However,the effects of such nutrient additions on topsoil C-and N-acquiring enzymes activities are unclear.In this study,the impacts of fertilization onβ-1,4-glucosidase(BG),β-D-cellobiosidase(CBH),β-1,4-xylosidase(BX),β-1,4-N-acetyl-glucosaminidase(NAG),and leucine amino peptidase(LAP)enzymes activities from topsoil and litter layer of two tropical plantations(Acacia auriculiformis and Eucalyptus urophylla)were measured.The results showed that N addition had neutral impact on topsoil enzymes,while significantly elevating the activities of BG,CBH,BX,and NAG in the litter layer.P fertilization had no impacts except for an elevation of NAG in litter sample.There was no interactions found between N and P additions on these enzyme activities.The clearer impacts of N over P fertilization were unexpected because that the study site receives a high rate of atmospheric N deposition,and has low soil P availability.The impact of P fertilization on hydrolytic enzyme activities may be less important compared with that of N.Senhao Wang Taiki Mori Jiangming Mo Wei Zhang 2020Journal of Forestry Research2020,31,4:2
11Time-estimation error following Weber–Fechner law may explain subadditive time-discounting显示文摘Taiki Takahashi 0,,:1
12Adiponectin promotes endothelial progenitor cell number and function显示文摘Rei Shibata Carsten Skurk Noriyuki Ouchi Gennaro Galasso Kazuhisa Kondo Taiki Ohashi Masayuki Shimano Shinji Kihara Toyoaki Murohara Kenneth Walsh 2008FEBS Letters2008,,11:1
13Role of endobronchial ultrasound-guided transbronchial needle aspiration in the management of lung cancer显示文摘Kazuhiro Yasufuku Takahiro Nakajima Taiki Fujiwara Masako Chiyo Akira Iyoda Shigetoshi Yoshida Makoto Suzuki Yasuo Sekine Kiyoshi Shibuya Ichiro Yoshino 2008General Thoracic and Cardiovascular Surgery2008,,6:1
14Compre-hensive analysis of joint strength for dissimilar friction stir welds of mild steel to aluminum alloys显示文摘Tsutomu Tanaka Taiki Morishige Tomotake Hirata 2009Scripta Materialia2009,61,:1
15Dietary Patterns and Glucose Tolerance Abnormalities in Japanese Men 显示文摘Tetsuya Mizoue Taiki Yamaji Shinji Tabata 2006J Nutr2006,136,:1
16Antioxid effect of astaxanthin on phospholipid peroxidation in human erythrocytes显示文摘KIYOTAKA N TAKEHIRO K TAIKI M 2011British Journal of Nutrition2011,105,11:1
17Aeroassisted Orbital Transfer Trajectory Optimization Considering Thermal Protection System Mass显示文摘CHRISTIAN G TAIKI M RAPHAEL T H 2009Jour- nal of Guidance Control and Dynamics2009,32,3:1
18Numerical Simulation of Ice Accretion Phenomena on Rotor Blade of Axial Blower显示文摘Ice accretion is the phenomenon that super-cooled water droplets impinge and accrete on a body. It is well known that ice accretion on blades and airfoils leads to performance degradation and severe accidents. For this reason, experimental investigations have been carried out using flight tests or icing tunnels. However, it is too expensive, dangerous, and difficult to set actual icing conditions. Hence, computational fluid dynamics is useful to predict ice accretion. A rotor blade is one of jet engine components where ice accretes. Therefore, the authors focus on the ice accretion on a rotor blade in this study. Three-dimensional icing phenomena on the rotor blade of a commercial axial blower are computed here, and ice accretion on the rotor blade is numerically investigated.Taiki Matsuura Masaya Suzuki Makoto Yamamoto Shinichiro Shishido Takeshi Murooka Hiroshi Miyagawa 2012Journal of Thermal Science2012,21,4:1
19A Neural Network Controller for Trajectory Control of Industrial Robot Manipulators 显示文摘JIANG Zhaohui TAIKI ISHITA 2008Journal of Computers2008,3,8:1
20Endoscopic salvage technique for spontaneous dislocation and tumor ingrowth of a partially covered, self-expandable metallic stent after endoscopic ultrasound-guided choledochoduodenostomy显示文摘Hiroshi Kawakami Masaki Kuwatani Kazumichi Kawakubo Taiki Kudo Yoko Abe Kimitoshi Kubo Naoya Sakamoto 2014Endoscopy2014,,:1
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