检索结果-南通市图书馆

Phase-Plane Invariant Analysis of Pressure Fluctuations in Fluidized Beds

在线全文

学校读者我要写书评

暂无评论

Tsinghua Science and Technology 2007年第3期12卷 284-289页

作者：王晓亮何榕 toshiyuki suda Junichi Sato Department of Thermal Engineering Tsinghua University Technical Development Department Ishikawajima-Harima Heavy Industries Co.Ltd. Yokohama 235-8501Japan

Partial agglomeration is a major problem in fluidized beds. A chaotic analytical method based on the phase-plane invariant of the pressure fluctuations in the fluidized beds has been used to warn of agglomeration at an early stage. Cold tests （no combustion） and hot tests （combustion） in fluidized beds show that the phase-plane invariant of the pressure fluctuations can distinguish the dynamic behavior of fluidized beds with different flow rates in cold tests. With combustion, when the flow rate was kept constant, agglomeration was detected very early by looking at the phase-plane invariant. The phase-plane invariant can be used to distinguish changes in fluidized beds due to changes in the flow rate, agglomeration, or various other factors. Therefore, this reliable agglomeration early warning system can be used for better control of circulating fluidized beds.

关键词： pressure fluctuation chaos phase-plane invariant fluidized beds

Characterization of Pressure Signals in Fluidized Beds Loaded with Large Particles Using Wigner Distribution Analysis: Feasibility of Diagnosis of Agglomeration

在线全文

学校读者我要写书评

暂无评论

Chinese Journal of Chemical Engineering 2007年第1期15卷 24-29页

作者：张建胜吕俊复王昕张海岳光溪 suda toshiyuki SATO Junichi Deparment of Thermal Engineering Tsinghua UniversityBeijing 100084.China Ishikawajima-Harima Heavy Industries Co..Ltd.Japan

An experimental verification is reported on the early predicting index of agglomeration in bubbling fluidized bed. Coarse quartz sand, which has the same density but larger diameter than the bed material, was used to simulate the initial agglomerated particle. Wigner distribution was used to analyze the pressure fuctuation of the tested bed, and the average amplitude of local domain frequency （LDF） and local peak weighted average frequency （LPWA） under different operating conditions were measured and compared. The results showed that the LDF is sensitive to the agglomeration phenomena and had quick response to the incipient agglomeration in fluidized beds. It can be concluded from the results that these two parameters could be taken as the characteristic indexes to the agglomeration in fuidized beds.

关键词： bubbling fluidized bed pressure fluctuation agglomeration Wigner distribution

Targeting therapy for hepatocellular carcinoma by delivering microRNAs as exosomal cargo

在线全文

学校读者我要写书评

暂无评论

World Journal of Gastroenterology 2024年第17期30卷 2369-2370页

作者： Takeshi suda Department of Gastroenterology and Hepatology Uonuma Institute of Community MedicineNiigata University Medical and Dental HospitalMinami Uonuma 949-7302NiigataJapan

Exosomes,the smallest extracellular vesicles,have gained significant attention as key mediators in intercellular communication,influencing both physiological and pathological processes,particularly in cancer progression.A recent review article by Wang et al was published in a timely manner to stimulate future research and facilitate practical developments for targeted treatment of hepatocellular carcinoma using exosomes,with a focus on the origin from which exosomes *** information about the mechanisms for delivering exosomes to specific cells is incorporated,the concept of targeted therapy for hepatocellular carcinoma using exosomes could be more comprehensively understood.

关键词： Exosomal delivery Therapeutic targets MicroRNAs Hepatocellular carcinoma

Dual Fluidized Bed Gasification of High Water Content Biomass: Potential Technical Ways to Increase Efficiency and Eliminate Tars

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Dual Fluidized Bed Gasification of High Water Content Biomas...

Significance of oxidative stress and antioxidant capacity tests as biomarkers of premature ovarian insufficiency: A case control study

中国颗粒学会2006年年会暨海峡两岸颗粒技术研讨会

作者： Takahiro Murakami toshiyuki suda Hidehisa Tani Toshiro Fujimori Ishikawajima-Harima Heavy Industries （IHI） Co. Ishikawajima-Harima Heavy Industries （IHI） Co. Ishikawajima-Harima Heavy Industries （IHI） Co. Ishikawajima-Harima Heavy Industries （IHI） Co.

＜正＞Dual fluidized bed gasification （DFBG） allows the production of middle-caloric gas free of serious dilution by N2 of combustion air. It is particularly suitable to thermal conversion of biomass at energy capacities of tens to hundred of MW because of its involvement of fluidized bed gasifier that has to run at temperatures below 1173 K. This article concerns the application of DFBG to various high water content residues generated in beverage, seasoner and food industries. These residues, such as coffee grounds, tee grounds, vinegar lees and bagasse, represent a kind of biomass resources that are concentrated already. A few potential technical means were proposed and further tested in a 5.0 kg/h pilot gasification facility to increase gasification efficiency and suppress tar evolution. These include the choice of superior technical deployment for DFBG, the impregnation of Ca onto fuel in fuel drying, and the integration of gas cleaning with fuel gasification via two-stage DFBG （T-DFBG）. The attained results demonstrated that all the means were effective to certain degrees, but the Ca-impregnated fuel exhibited distinctively high upgrades for both fuel conversion efficiency and tar elimination capability. An advanced approach called the decoupled DFBG （D-DFBG） was also devised to gasify high water content biomass directly by making use of vaporized fuel water as part of steam reagent and taking advantage of the catalysis of char to eliminate tars.

关键词： high water content biomass catalytic gasification dual fluidized bed gasification decoupled gasification in-bed gas upgrading calcium two-stage fluidized bed

来源： cnki会议评论

在线全文

cnki会议

学校读者我要写书评

暂无评论

World Journal of Clinical Cases 2024年第3期12卷 479-487页

作者： Kaoru Kakinuma toshiyuki Kakinuma Department of Obstetrics and Gynecology International University of Health and Welfare HospitalTochigi 329-2763Japan Graduate School of Medicine International University of Health and WelfareTokyo 107-8402Japan

BACKGROUND Premature ovarian insufficiency(POI)is a condition that causes secondary amenorrhea owing to ovarian hypofunction at an early *** follicular depletion results in intractable infertility,thereby considerably reducing the quality of life of *** the continuum in weakened ovarian function,progressing from incipient ovarian failure(IOF)to transitional ovarian failure and further to POI,it is necessary to develop biomarkers for predicting *** oxidative stress states in IOF and POI were comprehensively evaluated via oxidative stress[diacron-reactive oxygen metabolites(d-ROMs)]test and anti-oxidant capacity[biological antioxidant potential(BAP)].METHODS Females presenting with secondary amenorrhea over 4 mo and a follicle stimulating hormone level of>40 mIU/mL were categorized into the POI *** presenting with a normal menstrual cycle and a follicle stimulating hormone level of>10.2 mIU/mL were categorized into the IOF *** females without ovarian hypofunction were categorized into the control *** females aged<40 years who visited our hospital from January 2021 to June 2022,we recruited 11 patients into both POI and IOF *** the potential antioxidant capacity,the relative oxidative stress index(BAP/d-ROMs×100)was calculated,and the oxidative stress defense system was comprehensively *** d-ROMs were significantly higher in the POI and IOF groups than in the control group,(478.2±58.7 ***,434.5±60.6 ***,and 341.1±35.1 ***,respectively)(*** is equivalent to 0.08 mg/dL of hydrogen peroxide).However,no significant difference was found between the POI and IOF *** BAP,no significant difference was found between the control,IOF,and POI groups(2078.5±157.4μmol/L,2116.2±240.2μmol/L,and 2029.0±186.4μmol/L,respectively).The oxidative stress index was significantly higher in the POI and IOF groups than in the control group(23.7±3.3,20.7±3.6,and 16.5±2.1,respectively).However,no signifi

关键词： Premature ovarian insufficiency Oxidative stress Diacron-reactive oxygen metabolites test Biological antioxidant potential Infertility Biomarker

Prognosis value of heat-shock proteins in esophageal and esophagogastric cancer:A systematic review and meta-analysis

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

World Journal of Gastrointestinal Oncology 2024年第4期16卷 1578-1595页

作者： Eric toshiyuki Nakamura Amanda Park Marina Alessandra Pereira Daniel Kikawa Francisco Tustumi Department of Gastroenterology Instituto do CâncerHospital das Clínicas da Universidade de São PauloFaculdade de MedicinaUniversidade de São PauloSão Paulo 01246000Brazil Department of Scientific Initiation Universidade Mogi das CruzesSão Paulo 08780911Brazil Department of Evidence-Based Medicine Centro Universitário LusíadaCentre for Evidence-Based MedicineCentro Universitário Lusíada(UNILUS)SantosBrazil Department of Surgery Hospital Israelita Albert EinsteinSão Paulo 05652900Brazil

BACKGROUND Heat shock proteins(HSPs)are molecular chaperones that play an important role in cellular protection against stress events and have been reported to be overex-pressed in many *** prognostic significance of HSPs and their regulatory factors,such as heat shock factor 1(HSF1)and CHIP,are poorly *** To investigate the relationship between HSP expression and prognosis in esophageal and esophagogastric *** A systematic review was conducted in accordance with PRISMA recommend-ations(PROSPERO:CRD42022370653),on Embase,PubMed,Cochrane,and ***,case-control,and cross-sectional studies of patients with eso-phagus or esophagogastric cancer were ***-positive patients were compared with HSP-negative,and the endpoints analyzed were lymph node metastasis,tumor depth,distant metastasis,and overall survival(OS).HSPs were stratified according to the HSP family,and the summary risk difference(RD)was calculated using a random-effect *** The final selection comprised 27 studies,including esophageal squamous cell carcinoma(21),esophagogastric adenocarcinoma(5),and mixed neoplasms(1).The pooled sample size was 3465 ***40 and 60 were associated with a higher 3-year OS[HSP40:RD=0.22;95%confidence interval(CI):0.09-0.35;HSP60:RD=0.33;95%CI:0.17-0.50],while HSF1 was associated with a poor 3-year OS(RD=-0.22;95%CI:-0.32 to-0.12).The other HSP families were not associated with long-term ***1 was associated with a higher probability of lymph node metastasis(RD=-0.16;95%CI:-0.29 to-0.04).HSP40 was associated with a lower probability of lymph node dissemination(RD=0.18;95%CI:0.03-0.33).The expression of other HSP families was not significantly related to tumor depth and lymph node or distant *** The expression levels of certain families of HSP,such as HSP40 and 60 and HSF1,are associated with long-term survival and lymph node dissemination in patients with esophageal and esophagogastric cancer.

关键词： Heat-shock proteins Heat-shock response Prognosis Esophageal neoplasms Meta-analysis

Abnormal uterine bleeding successfully treated via ultrasoundguided microwave ablation of uterine myoma lesions: Three case reports

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

World Journal of Clinical Cases 2024年第5期12卷 980-987页

作者： toshiyuki Kakinuma Kaoru Kakinuma Rora Okamoto Kaoru Yanagida Michitaka Ohwada NobuhiroTakeshima Takeshima Department of Obstetrics and GynecologyInternational University of Health and Welfare HospitalTochigi 329-2763Japan

BACKGROUND Microwave endometrial ablation(MEA)is a minimally invasive treatment method for heavy menstrual ***,additional treatment is often required after recurrence of uterine myomas treated with ***,because this treatment ablates the endometrium,it is not indicated for patients planning to become *** overcome these issues,we devised a method for ultrasound-guided microwave ablation of uterine myoma feeder *** report three patients successfully treated for heavy menstrual bleeding,secondary to uterine myoma,using our novel *** SUMMARY All patients had a favorable postoperative course,were discharged within 4 h,and experienced no ***,no postoperative recurrence of heavy menstrual bleeding was *** method also reduced the myoma’s maximum *** This method does not ablate the endometrium,suggesting its potential appli-cation in patients planning to become pregnant.

关键词： Uterine myoma Microwave Heavy menstrual bleeding Dysmenorrhea Fertility preservation Case report

Elucidating microbial iron corrosion mechanisms with a hydrogenase-deficient strain of Desulfovibrio vulgaris

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

mLife 2024年第2期3卷 269-276页

作者： Di Wang toshiyuki Ueki Peiyu Ma Dake Xu Derek R.Lovley Electrobiomaterials Institute Key Laboratory for Anisotropy and Texture of Materials(Ministry of Education)Northeastern UniversityShenyangChina Shenyang National Laboratory for Materials Science Northeastern UniversityShenyangChina Department of Microbiology University of MassachusettsAmherstMAUSA

Sulfate-reducing microorganisms extensively contribute to the corrosion of ferrous metal *** is substantial debate over their corrosion *** investigated Fe^(0) corrosion with Desulfovibrio vulgaris,the sulfate reducer most often employed in corrosion *** were grown with both lactate and Fe^(0) as potential electron donors to replicate the common environmental condition in which organic substrates help fuel the growth of corrosive ***^(0) was corroded in cultures of a *** hydrogenase-deficient mutant with the 1:1 correspondence between Fe^(0) loss and H_(2) accumulation expected for Fe^(0) oxidation coupled to H+reduction to H_(2).This result and the extent of sulfate reduction indicated that *** was not capable of direct Fe^(0)-to-microbe electron transfer even though it was provided with a supplementary energy source in the presence of abundant ferrous *** in the hydrogenase-deficient mutant cultures was greater than in sterile controls,demonstrating that H_(2) removal was not necessary for the enhanced corrosion observed in the presence of *** parental H_(2)-consuming strain corroded more Fe^(0) than the mutant strain,which could be attributed to H_(2) oxidation coupled to sulfate reduction,producing sulfide that further stimulated Fe^(0) *** results suggest that H_(2) consumption is not necessary for microbially enhanced corrosion,but H_(2) oxidation can indirectly promote corrosion by increasing sulfide generation from sulfate *** finding that *** was incapable of direct electron uptake from Fe^(0) reaffirms that direct metal-to-microbe electron transfer has yet to be rigorously described in sulfate-reducing microbes.

关键词： electrobiocorrosion electron transfer hydrogen transfer microbial corrosion sulfate-reducing microbes

煤焦与水蒸气的气化实验及表观反应动力学分析

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

中国电机工程学报 2008年第5期28卷 34-38页

作者：王明敏张建胜岳光溪吕俊复须田俊之高藤誠清华大学热科学与动力工程教育部重点实验室北京市100084 石川岛播磨重工业株式会社基础技术研究所日本横滨市235-8501

在Thermax500型热重分析仪上对褐煤煤焦与水蒸气的气化反应进行了实验研究,并采用n级速率方程和Langmuir-Hinshelwood(L-H)速率方程考察了反应气体分压的影响。实验系统压力为0.1和0.6MPa,其中0.1MPa下水蒸气浓度分别为5%,10%和20%,0.6... 详细信息

在Thermax500型热重分析仪上对褐煤煤焦与水蒸气的气化反应进行了实验研究,并采用n级速率方程和Langmuir-Hinshelwood(L-H)速率方程考察了反应气体分压的影响。实验系统压力为0.1和0.6MPa,其中0.1MPa下水蒸气浓度分别为5%,10%和20%,0.6MPa下的水蒸气浓度为20%。气化反应在恒温条件下进行,温度分别为850、875、900、925、950和1000℃。实验发现,反应速率随温度和压力的增大而加快,900℃以下为化学反应控制区,不同压力下的表观活化能数值接近,而900℃以上由于受到扩散阻力的作用,表观活化能不同程度降低。采用n级速率方程计算得到褐煤煤焦与水蒸气的反应级数n为0.34,活化能E为153.7kJ·mol-1,采用L-H方程得到活化能为207.1kJ·mol-1,其速率方程可更精确地描述水蒸气压力的影响。

关键词：褐煤水蒸气加压气化动力学