检索结果-南通市图书馆

Production of Biodiesel with Seed Soybean and Supercritical Ethanol

Journal of Sustainable Bioenergy Systems 2014年第2期4卷 128-135页

作者： Gabriel Cassemiro Mariano Toni Jefferson Lopes rafael dias Marintho Bastos Quadri Ariovaldo Bolzan Laboratory of Process Control(LCP) Chemical EngineeringFederal University of Santa Catarina(UFSC)FlorianopolisBrasil Federal University of Rio Grande(FURG) Campus Santo Antonio da Patrulha(SAP)Rio Grande do SulBrasil

This paper presents a study of biodiesel production by a non-catalytical process. The innovation in this study is the use of novel materials for production: seed soybean (Glycine Max) “in natura” and ethanol in a supercritical state. To conduct the experiments, a bench reactor with a capacity of 150 mL, resistant to pressure of up to 300 bar and temperature of 350°C was developed. The fractional factorial experimental design () was used to evaluate the temperature, seed granulometry, molar ratio ethanol/oil and water percent of the mixture. The best yield observed was that of 94.07%, 10 minutes after the reactor entered a supercritical condition. Significant effects on seed granulometry, molar ratio ethanol, oil and temperature were verified. From the proposed process, biodiesel and toasted soybean seed were obtained. To purify the biodiesel sample it was necessary to use ultra-centrifugation to separate seed particles, and rotoevaporation to separate the fatty acid ethyl ester and unreacted ethanol. The chemical analyses were conducted directly by gas chromatography. The yield was calculated in accordance with concentrations obtained in the chromatographic analysis and seed mass of the experiment. Also checked was the presence of palmitate esters, stearate, oleate, linoleate and linolenate. By analyzing the ester composition it was possible to assess whether a good quality biodiesel was available. The roasted soybean seeds obtained after the reaction showed a calorific potential of 2203.17 kcal/kg and also be used as fuel.

关键词： Supercritical Biodiesel Non-Catalytic Transesterification Ethyl Ester Soybean Seed

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Preliminary Developments of Miniplate-Type Fuel of U-2.5Zr-7.5Nb Alloy Dispersed and Cladded in Zircaloy

引用

Journal of Energy and Power Engineering 2014年第8期8卷 1409-1414页

作者： Natalia Mattar Cantagalli Kelly Cristina Martins Faeda rafael Witter dias Pais Ana Maria Matildes dos Santos Wilmar Barbosa Ferraz CDTN/CNEN (Centro de Desenvolvimento da Tecnologia Nuclear) Belo Horizonte 31270-901 Brazil

Nuclear fuel based on uranium metal alloys is utilized in research and test reactors. For the purpose of the reduction of fuel enrichment, high densities of uranium-235 in this kind of fuel are needed. This can be achieved when uranium alloys are used containing elements such as Zr, Mo and Nb. The construction of fuel element with high-uranium density requires materials with low cross sections for neutron absorption, stability under irradiation and absence of the chemical interactions between the fuel and cladding elements. In case of U-Zr-Nb alloys, Zry （zircaloy） cladding is a better option due to the fact that they have a higher chemical compatibility when compared with the use of aluminum alloys. This study aims to develop plate type nuclear fuel using the U-2.5Zr-7.5Nb alloy dispersed in Zry. Powders of this uranium based alloy and Zry were obtained by hydriding-dehydriding process. These powders were homogenized, compacted in pellet that was sandwiched in plates and frame of Zry. This assembly was hot rolled forming the dispersion fuel miniplate.

关键词： Nuclear fuel plate U-Zr-Nb alloy Zry

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

The Arckitbuilding Bricks as a Didactic Tool for Experimentation in Architectural Design： Possibilities and Limitations

引用

Journal of Civil Engineering and Architecture 2018年第1期12卷 59-64页

作者： Frederico Braida rafael Henriques Campos dias Icaro Chagas da Silva Isabela Ruback Cascardo de Almeida Janaina Mendes de Castro Mariane Garcia Unanue Antonio Colchete Filho Graduate Program in Built Environment Federal University of Juiz de Fora Juiz de Fora 36036-900 Brazil Faculty of Architecture and Urbanism Federal University of Juiz de Fora Juiz de Fora 36036-900 Brazil

This article deals with the usage of building bricks as a didactic material for the development of architectural design. The building brick game chosen for analysis was the Arckit, since it is suitable for the architectural practice. It is estimated that this game can contribute to the design, representation and presentation of projects. In order to investigate in which aspects Arckit presents possibilities of applications, as well as limitations of use, the article approaches the importance of building bricks as a didactic tool and its use in the field of the architectural design process. From a literature review and an empirical experience, this article reports a qualitative research, where the applicability of the Arckit game was checked. Through a critical reflection based on that experience, it was possible to conclude that whereas its limitations to urban form and linked to the formal vocabulary that composes the grammar of these bricks, the Arckit building bricks represent in architecture a playful and experimental way to think and design, fomenting the creativity and the spatial perception, resulting in a particular experience that can make architecture better connected with dreams and joy.

关键词： Physical model building bricks didactic tool education design architecture.

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

State’s Technical Cartography and Social Cartography’s Participatory Mapping: Contributions to a Contemporary Reflection on the Use of Maps

引用

Journal of Geographic Information System 2020年第4期12卷 319-333页

作者： Christian Nunes Da Silva Vicka De Nazaré Magalhães Marinho Gracilene De Castro Ferreira Yasmin Alves Dos Santos Roberto Magno Reis Netto Aline Reis De Oliveira Araújo rafael Dantas dias Adolfo Da Costa Oliveira Neto Rodolpho Zahluth Bastos João Marcio Palheta Da Silva Leonardo De Sousa Santos Federal University of Pará Belém Pará Brazil

The use of cartography in geographical approaches, notably in those focused on territorial discussions, is gaining more and more importance. However, the use of technical maps still prevails, which often act to hinder its use and appropriation by traditional communities. Based on this assumption, this article seeks to show that, in addition to technical cartography, there are other methodologies, which should also be used, in both elaboration and representation of territories, such as the participatory mapping. For that, some recommendations and suggestions are presented in this paper, aiming to subsidize the application and the collaboration of maps, through the mentioned methodology. These suggestions and contributions are the result of both theoretical debates and in loci observations, in workshops held in traditional communities of Brazilian Amazonia. From these discussions, it is concluded that the adoption of participatory mapping in the process of valuing and understanding the knowledge of traditional communities is of great value, in addition to serving as a subsidy for the claims of rights of both appropriation and possession of the territory.

关键词： Participatory Mapping Social Cartography Territory Traditional Communities

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Biomass-glycerol briquettes are not necessarily mechanically stable and energetically effective

引用

Waste Disposal and Sustainable Energy 2020年第4期2卷 291-303页

作者： Bruno rafael de Almeida Moreira Ronaldo da Silva Viana Samuel dias Moreira Monique dos Santos Lima Anderson Chagas Magalhães Celso Tadao Miasaki JoséClaudio Caraschi Department of Phytosanitary Rural Engineering and SoilsSchool of EngineeringSão Paulo State University(Unesp)Ilha SolteiraSão PauloBrazil Department of Plant Production College of Agricultural and Technological SciencesSão Paulo State University(Unesp)DracenaBrazil São Paulo State University(Unesp) ItapevaSão PauloBrazil

The re-use of glycerol from biodiesel industry as an alternative lubricant for making high-performance briquettes is ***,the technical performance of this agro-industrial residue is not *** study outlines,accordingly,the real risk of introducing glycerol into the co-briquetting of highly caloric by-products of *** production of hybrid briquettes consisted of pressing mixtures of residues of sugarcane and sorghum with the liquid additive at 10,20,and 30 wt.%in bench-scale hydraulic piston presser *** of the blend,briquettes containing the supplement at the highest level as part of their composition ended up being much more hygroscopic(20.10%)and less energetic(3.15 GJ m^(−3)).The explanation for the negative impact of glycerol on the thermomechanical behavior of briquettes would be overconcen-tration of additive capable of effectively defying compacting *** degree of compaction during co-briquetting has likely gone down quickly with a maximizing level of *** long as the additive is not able to lubricate the feedstock suitably,improbability of biomass particles to successfully bond together to form themselves into mechanically stable and energetically effective briquettes is *** lower density(273.80 kg m^(−3))and higher relaxation(22.75%),briquettes with glycerol at 30 wt.%generally were aesthetically ***,these products resisted no longer to handling,transportation,and *** lost their shape easily during emptying and shifting them,thus,releasing larger quanti-ties of biomass to the *** evidence of high-viscosity glycerol capable of limiting safe and effective production of high-performance briquettes for heating and power exists.

关键词： Additive Agro-residues Densification Biosolids Waste-to-energy

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Long-term outcomes of hepatocellular carcinoma that underwent chemoembolization for bridging or downstaging

引用

World Journal of Gastroenterology 2019年第37期25卷 5687-5701页

作者： Breno Boueri Affonso Francisco Leonardo Galastri Joaquim Mauricio da Motta Leal Filho Felipe Nasser Priscila Mina Falsarella rafael Noronha Cavalcante Marcio dias de Almeida Guilherme Eduardo Goncalves Felga Leonardo Guedes Moreira Valle Nelson Wolosker Department of Interventional Radiology Hospital Israelita Albert EinsteinSao Paulo 05651-901Sao PauloBrazil Department of Liver Transplant Hospital Israelita Albert EinsteinSao Paulo 05651-901Sao PauloBrazil Department of Vascular Surgery Hospital Israelita Albert EinsteinSao Paulo 05651-901Sao PauloBrazil

BACKGROUND Prospective study of 200 patients with hepatocellular carcinoma(HCC)that underwent liver transplant(LT)after drug-eluting beads transarterial chemoembolization(DEB-TACE)for downstaging versus *** survival and tumor recurrence rates were calculated,eligibility for LT,time on the waiting list and radiological response were *** TACE,only patients within Milan Criteria(MC)were *** patients underwent LT in bridging ***-year post-transplant overall survival,recurrence-free survival has no difference between the *** response was observed more frequently in bridging *** in DS group can achieve posttransplant survival and HCC recurrence-free probability,at five years,just like patients within MC in patients undergoing *** To determine long-term outcomes of patients with HCC that underwent LT after DEB-TACE for downstaging vs *** Prospective cohort study of 200 patients included from April 2011 through June *** group included patients within *** group(out of MC)was divided in 5 subgroups(G1 to G5).Total tumor diameter was≤8 cm for G1,2,3,4(n=42)and was>8 cm for G5(n=22).Downstaging(n=64)and bridging(n=136)populations were not significantly *** survival and tumor recurrence rates were calculated by the Kaplan-Meier ***,eligibility for LT,time on the waiting list until LT and radiological response were *** After TACE,only patients within MC were *** patients underwent LT in bridging group 65.9%(P=0.001).Downstaging population presented:higher number of nodules 2.81(P=0.001);larger total tumor diameter 8.09(P=0.001);multifocal HCC 78%(P=0.001);more post-transplantation recurrence 25%(P=0.02).Patients with maximal tumor diameter up to 7.05 cm were more likely to receive LT(P=0.005).Median time on the waiting list was significantly longer in downstaging group 10.6 mo(P=0.028).Five-year posttransplant over

关键词： Hepatocellular carcinoma Down-staging Liver transplantation Localregional therapy Bridging

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Prognostic implications of tumor-infiltrating lymphocytes in association with programmed cell death ligand 1 expression in remnant gastric cancer

引用

Chinese Journal of Cancer Research 2022年第6期34卷 612-622页

作者： Marina Alessandra Pereira Marcus Fernando Kodama Pertille Ramos André Roncon dias Leonardo Cardili rafael Dyer Rodrigues de Moraes Renan Ribeiro E Ribeiro Venancio Avancini Ferreira Alves Bruno Zilberstein Evandro Sobroza de Mello Ulysses Ribeiro Jr Department of Gastroenterology Instituto do Cancer do Estado de Sao PauloHospital das ClinicasFaculdade de MedicinaUniversidade de Sao Paulo(ICESP-HCFMUSP)Sao PauloSP 01246-000Brazil Department of Pathology Instituto do Cancer do Estado de Sao PauloHospital das ClinicasFaculdade de MedicinaUniversidade de Sao Paulo(ICESP-HCFMUSP)Sao PauloSP 01246-000Brazil

Objective:Remnant gastric cancer(RGC)is usually associated with a worse *** they are less common and very heterogeneous tumors,new prognostic and reliable determinants are required to predict patients’clinical course for *** study aimed to investigate the tumor-infiltrating lymphocytes(TILs)and programmed cell death ligand 1(PD-L1)status as prognostic biomarkers in a cohort of patients with RGC to develop an immunerelated ***:Patients with gastric cancer(GC)who underwent curative intent gastrectomy were retrospectively *** resections with histological diagnosis of gastric adenocarcinoma were enrolled in the *** risk score based on immune parameters was developed using binary logistic regression *** were divided into high-risk(HR),intermediate-risk(IR),and low-risk(LR)groups based on their immune *** markers(CD3+,CD4+/CD8+T cells and PD-L1)were selected for their potential prognostic,therapeutic value,and evaluated by immunohistochemistry(IHC).Results:A total of 42 patients with RGC were enrolled in the *** score based on immune parameters exhibited an accuracy of 79%[the area under the receiver operating characteristic curve(AUC)=0.79,95%confidence interval(95%CI),0.63-0.94,P=0.002],and the population was divided into 3 prognostic groups:10(23.8%)patients were classified as LR,15(35.7%)as IR,and 17(40.5%)as HR *** were no differences in clinicopathological and surgical characteristics between the three *** survival analysis,HR and IR groups had worse disease-free survival and overall survival rates compared to the LR *** the multivariate analysis,lymph node metastasis and the immune score risk groups were independent factors related to worse ***:A scoring system with immune-related markers was able to distinguish prognostic groups of RGC associated with ***,tumor-infiltrating immune lymphocytes and PD-L1 status may serve as a potential prognostic bi

关键词： Stomach neoplasms gastric remnant tumor-infiltrating lymphocytes immune microenvironment

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Root Growth, Nutrition and Yield of Maize with Applied Finely Limestone in Surface of Cerrado Soil

引用

American Journal of Plant Sciences 2014年第6期5卷 834-844页

作者： rafael Felippe Ratke Hamilton Seron Pereira Joao de Deus Gomes dos Santos Junior Joaquim JoséFrazao Juliano Magalhaes Barbosa Bruno de Oliveira dias Departamento de Engenharias AgronomiaCampus Professora Cinobelina ElvasUniversidade Federal do PiauíBom JesusBrazil Instituto de Ciencias Agrárias Universidade Federal de UberlandiaUberlândiaBrazil Embrapa Centro Nacional de Pesquisa no CerradoPlanaltinaBrazil Programa de Pós-graduacao em Agronomia Universidade Federal de GoiásGoianiaBrazil

The surface applies lime to correcting soil acidity in no-tillage and promotes root development and yield of maize. However, limestone with a particle size smaller than 0.30 mm cannot promote this effect. The aim of this study was to determine the root attributes, nutrition and productivity of maize with limestone ground in no-tillage. The experimental design was randomized blocks with five treatments and four replications. The treatments consisted of different particle sizes of limestone applying superficially to the soil under NT 0) control, without lime, 1) 0.30 mm to 0.20 mm 2) 0.20 mm to 0.10 mm, 3) 0, 10 mm to 0.05 mm 4) 0.05 mm to 0.01 mm. Attributes root, leaf nutrition and grain yield of maize were evaluated in two years 2009 and 2010. The elongation of roots in a 20-40 cm depth was greater when using limestone with particle size between 0.30 mm and 0.20 mm. The root length of maize plants correlated with the levels of Mn in maize leaves. The root development promoted by liming effect was not reflected in the productivity of maize.

关键词： Particle Size No-Tillage Limestone

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Root Growth, Nutrition and Yield of Maize with Applied Different Limestone Particle Size in the Cerrado Soil

引用

American Journal of Plant Sciences 2014年第4期5卷 463-472页

作者： rafael Felippe Ratke Hamilton Seron Pereira Joao de Deus Gomes dos Santos Junior Joaquim JoséFrazao Juliano Magalhaes Barbosa Bruno de Oliveira dias Departamento de Engenharias AgronomiaCampus Professora Cinobelina ElvasUniversidade Federal do PiauíBom JesusBrazil Instituto de Ciencias Agrárias Universidade Federal de UberlandiaUberlandiaBrazil Embrapa Centro Nacional de Pesquisa no CerradoPlanaltinaBrazil Programa de Pós-Graduacao em Agronomia Universidade Federal de GoiásGoianiaBrazil

The limestone with smaller particle size provides rapid correction of soil acidity. However, the limestone with large particles can promote bigger root growth, and may still have a residual effect on the soil. The aim of this study was to evaluate the residual effect of the application and incorporation of different limestone with a particle size bigger than 0.30 mm in root growth, nutrition and yield of maize in Cerrado soil. A randomized completed block utilized in this experiment, with five treatments and four replications. The grain sizes of dolomitic limestone incorporated into the Oxisol were: 0 (control, no-lime), 2.00-0.82 mm, 0.82-0.56 mm, 0.56-0.30 mm, 0.30-0.20 mm, in doses of 6.5 t·ha-1, 3.9 t·ha-1, 2.6 t·ha-1 and 1.3 t·ha-1 respectively. The limestone applied in introduction no-tillage. The maize were evaluated of root attributes, nutrition and grain yield in two years 2009 and 2010. The use of limestone particle size of 2.00-0.82 mm, and the quantity of 6.5 t·ha-1 applied to the soil and incorporated showed elongation and root growth of maize thin depth of 20-40 cm in the soil. In that, same proposed management of the limestone was the highest maize grain yield in the first year. The rooting characteristics evaluated correlated with leaf Ca and Cu and maizegrain yield.

关键词： Limestone No-Tillage Zea Mays

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Emerging agents that target signaling pathways to eradicate colorectal cancer stem cells

引用

Cancer Communications 2021年第12期41卷 1275-1313页

作者： Valdenizia R.Silva Luciano de S.Santos Rosane B.dias Claudio A.Quadros Daniel P.Bezerra Gonçalo Moniz Institute Oswaldo Cruz Foundation(IGM-FIOCRUZ/BA)SalvadorBahia 40296-710Brazil São rafael Hospital Rede D’Or/São LuizSalvadorBahia 41253-190Brazil Bahia State University SalvadorBahia 41150-000Brazil

Colorectal cancer(CRC)represents the third most commonly diagnosed cancer and the second leading cause of cancer death *** modern concept of cancer biology indicates that cancer is formed of a small population of cells called cancer stem cells(CSCs),which present both pluripotency and self-renewal *** cells are considered responsible for the progression of the disease,recurrence and tumor ***,some cell signaling pathways participate in CRC survival,proliferation,and selfrenewal properties,and most of them are dysregulated in CSCs,including the Wingless(Wnt)/β-catenin,Notch,Hedgehog,nuclear factor kappa B(NF-κB),Janus kinase/signal transducer and activator of transcription(JAK/STAT),peroxisome proliferator-activated receptor(PPAR),phosphatidyl-inositol-3-kinase/Akt/mechanistic target of rapamycin(PI3K/Akt/mTOR),and transforming growth factor-β(TGF-β)/Smad *** this review,we summarize the strategies for eradicating CRC stem cells by modulating these dysregulated pathways,which will contribute to the study of potential therapeutic schemes,combining conventional drugs with CSC-targeting drugs,and allowing better cure rates in anti-CRC therapy.

关键词： colorectal cancer stem cells cell signaling Wnt/β-catenin pathway Notch Hedgehog NF-κB JAK/STAT signaling PI3K/Akt/mTOR signaling targeted therapy

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：