检索结果-南通市图书馆

Extramedullary plasmocytoma associated with a massive deposit of amyloid in the duodenum

World Journal of Gastroenterology 2009年第28期15卷 3565-3568页

作者： Fabiana Pirani Carneiro Maria de Nazareth Machado Sobreira Lívia Bravo Maia Alesso Cervantes Sartorelli luiz eduardo de almeida prado franceschi Mauro Brito Brando Bárbara Wosnjuk Calaca Fernando Silva Lustosa Joo Vieira Lopes department of Pathology University Hospital of Brasília department of Radiology University Hospital of Brasília department of Hematology University Hospital of Brasília department of Surgery University Hospital of Brasília

We report a rare case of extramedullary plasmocytoma associated with a massive deposit of amyloid in the duodenum. A 72-year-old Japanese man was admitted to our hospital presenting with a 3-mo history of epigastric pain, vomiting and weight loss. On computed tomography （CT） a wall thickening of the fourth part of the duodenum was observed. Multiple biopsies obtained from the lesion showed infiltration of plasma cells and lymphocytes, but they were not conclusive. The patient underwent resection of the lesion and, on histopathological examination, the lesion consisted of a dense and diffuse infiltrate of plasma cells and a few admixed lymphocytes with reactive follicles extending to the muscular propria. An extensive deposition of amyloid was also observed. Immunohistochemical stains revealed that a few plasmacytoid cells showed λ light chain staining, though most were κ： light chain positive. These cells also were positive for CD138 and CD56 but negative for CD20 and CD79. The findings were consistent with extramedullary plasmocytoma associated with a massive deposit of amyloid in duodenum. A subsequent workup for multiple myeloma was completely negative. The patient showed no signs of local recurrence or dissemination of the disease after 12 mo follow-up. Because of the association of plasmocytoma and amyloidosis, the patient must be followed up because of the possible systemic involvement of the neoplasm and amyloidosis in future.

关键词： Extramedullary plasmocytoma Amyloidosis Duodenum Plasma cell neoplasms Immunohistochemistry

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 effect of abiotic stresses on plant C:N:P homeostasis and their mitigation by silicon

引用

The Crop Journal 2024年第2期12卷 340-353页

作者： Milton Garcia Costa Renato de Mello prado luiz Fabiano Palaretti Jonas Pereira de Souza Júnior department of Agricultural Production Science School of Agricultural and Veterinarian SciencesSão Paulo State UniversityJaboticabalBrazil

In crop plants, various environmental stresses affect the balance of carbon, nitrogen, and phosphorus(C:N:P), leading to biochemical and physiological alterations and reductions in yield. Silicon(Si) is a beneficial element that alleviates plant stress. Most studies involving silicon have focused on physiological responses, such as improvements in photosynthetic processes, water use efficiency, and antioxidant defense systems. But recent research suggests that stressed plants facing either limited or excessive resources(water, light, nutrients, and toxic elements), strategically employ Si to maintain C:N:P homeostasis, thereby minimizing biomass losses. Understanding the role of Si in mitigating the impact of abiotic stresses on plants by regulating C:N:P homeostasis holds great potential for advancing sustainable agricultural practices in crop production. This review presents recent advances in characterizing the influence of environmental stresses on C:N:P homeostasis, as well as the role of Si in preserving C:N:P equilibrium and attenuating biological damage associated with abiotic stress. It underscores the beneficial effects of Si in sustaining C:N:P homeostasis and increasing yield via improved nutritional efficiency and stress mitigation.

关键词： Nutritional stoichiometry Elemental stoichiometry Beneficial element Environmental stresses Nutritional efficiency Carbon use efficiency Agricultural sustainability

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

Biochar and sugar cane filter cake interaction on physical and hydrological soil properties under tropical field conditions

引用

Biochar 2020年第2期2卷 195-210页

作者： Sara de Jesus Duarte Bruno Glaser Blanca Lucia prado Pano Carlos eduardo Pellegrino Cerri Soil and Plant Nutrition Luiz de Queiroz College of AgricultureUniversity of São PauloAvenida Pádua Dias11-AgronomiaPiracicabaSP 13418-900Brazil Soil Biogeochemistry Martin Luther University Halle-WittenbergVon-Seckendorff-Platz 306120 HalleGermany Instituto de Geología Universidad Nacional Autónoma de MéxicoMéxicoD.F.Mexico

Biochar is known for its effects on carbon sequestration and soil ***,there is a lack of information about its effects on soil physical and hydraulic properties for tropical *** assessed the effects of biochar(BC)plus sugar cane filter cake(FC)rate,and time of interaction on soil physical and hydraulic properties under humid tropical *** this purpose,a field experiment was installed at a loamy sandy soil with five treatments and four replicates:control(only soil),25 Mg ha^(−1) sugar cane filter cake,and 25 Mg ha^(−1) sugar cane filter cake plus 6.25,12.5,and 25 Mg ha^(−1) Miscanthus biochar,respectively,two soil depths(0-10 and 10-20 cm)and two times of interaction(9 and 18 months).Physical prop-erties(aggregate stability,bulk density,total porosity,pores size distribution)and hydraulic properties(soil water holding capacity,hydraulic conductivity,plant-available water holding capacity)were measured after nine and eighteen *** bulk density decreased slightly,and the porosity increased after nine months,for the biochar plus sugar cane filter cake(both 25 Mg ha^(−1)).After 18 months,biochar plus filter cake interaction increase micropores,aggregate stability,and plant-available water *** hydraulic conductivity was not influenced by sugar cane filter ***,biochar significantly reduced saturated hydraulic conductivity when combined with sugar cane filter cake after 18 *** concluded that sugar cane filter cake in combination with biochar modified the pore size distribution,slightly increased plant-available water holding capacity,and significantly decreased saturated hydraulic conductivity.

关键词： Water retention Hydraulic conductivity Miscanthus biochar Soil physics

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

Papillary fistulotomy vs conventional cannulation for endoscopic biliary access:A prospective randomized trial

引用

World Journal of Gastroenterology 2018年第16期24卷 1803-1811页

作者： Carlos Kiyoshi Furuya Paulo Sakai Fabio Ramalho Tavares Marinho Jose Pinhata Otoch Spencer Cheng Lívia Lemes Prudencio eduardo Guimaraes Hourneaux de Moura Everson luiz de almeida Artifon department of Gastrointestinal Endoscopy Unit University of Sao PauloSao Paulo 05409001Brazil department of Surgery University of Sao PauloSao Paulo 05403000Brazil department of Gastroenterology and Radiology University of Sao PauloSao Paulo 04107-030Brazil

AIM To compare the cannulation success, biochemical profile, and complications of the papillary fistulotomy technique vs catheter and guidewire standard *** From July 2010 to May 2017, patients were prospectively randomized into two groups: Cannulation with a catheter and guidewire(Group Ⅰ) and papillary fistulotomy(Group Ⅱ). Amylase, lipase and C-reactive protein at T0, as well as 12 h and 24 h after endoscopic retrograde cholangiopancreatography, and complications(pancreatitis, bleeding, perforation) were *** We included 102 patients(66 females and 36 males, mean age 59.11 ± 18.7 years). Group Ⅰ and Group Ⅱ had 51 patients each. The successful cannulation rates were 76.5% and 100%, respectively(P = 0.0002). Twelve patients(23.5%) in Group Ⅰ had a difficult cannulation and underwent fistulotomy, which led to successful secondary biliary access(Failure Group). The complication rate was 13.7%(2 perforations and 5 mild pancreatitis) vs 2.0%(1 patient with perforation and pancreatitis) in Groups Ⅰ and Ⅱ, respectively(P = 0.0597). CONCLUSION Papillary fistulotomy was more effective than guidewire cannulation, and it was associated with a lower profile of amylase and lipase. Complications were similar in both groups.

关键词： Catheterization Complications Endoscopic retrograde cholangiopancreatography Therapeutic use Common bile duct

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

Co-Simulation of an SRG Wind Turbine Control and GPRS/EGPRS Wireless Standards in Smart Grids

引用

IEEE/CAA Journal of Automatica Sinica 2021年第3期8卷 656-663页

作者： Andre luiz de Oliveira Carlos eduardo Capovilla Ivan Roberto Santana Casella JoséLuis Azcue-Puma Alfeu J.Sguarezi Filho University of Sao Paulo Sao Paulo 05508-010Brazil Federal University of ABC Santo Andre 09210-580Brazil

Wind energy can be considered a push-driver factor in the integration of renewable energy sources within the concept of smart *** its full deployment,it requires a modern telecommunication infrastructure for transmitting control signals around the distributed generation,in which,the wireless communication standards stand out for employing modern digital modulation and coding schemes for error correction,in order to guarantee the power plant *** some developing countries,such as Brazil,the high penetration of commercial mobile wireless standards GPRS and EGPRS(based on GSM technology)have captivated the interests of the energy sector,and they now seek to perform remote monitoring and control *** this context,this article presents a comparative performance analysis of a wireless control system for a wind SRG,when a GPRS or EGPRS data service is *** system performance is analyzed by co-simulations,including the wind generator dynamics and the wireless channel *** satisfactory results endorse the viability and robustness of the proposed system.

关键词： General packet radio service(GPRS)/enhanced GPRS(EGPRS) smart grids switched reluctance generator(SRG) wind energy wireless communications

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

dendritic Growth, Eutectic Features and Their Effects on Hardness of a Ternary Sn–Zn–Cu Solder Alloy

引用

Acta Metallurgica Sinica(English Letters) 2017年第6期30卷 528-540页

作者： Bismarck luiz Silva Rodrigo Valenzuela Reyes Amauri Garcia Joséeduardo Spinelli department of Materials Engineering Federal University of Rio Grande do Norte-UFRNNatalRN 59078-970Brazil department of Materials Engineering Federal University of Sao Carlos-UFSCarSao CarlosSP 13565-905Brazil department of Manufacturing and Materials Engineering University of CampinasUNICAMPCampinasSP 13083-860Brazil

The present investigation is based on the results of a directionally solidified （DS） Sn-9 wt%Zn-2 wt%Cu alloy, including primary/secondary/tertiary dendrite arm spacings of the Sn-rich matrix, the morphologies of the eutectic mixture and the corresponding interphase spacing, the nature and proportion of the Cu-Zn intermetallic compound （IMC）. The main purpose is to establish interrelations of these microstructure features with experimental solidification thermal parameters, such as cooling rates and growth rates （v）, macrosegregation and hardness. Such interrelations are interesting for both industry and academy since they represent a tool permitting the preprogramming of final properties based on the design of the microstructure. In the case of Sn-Zn-Cu alloys, hardly anything is known about the combined effects of the length scale of the microstructure and fraction and distribution of the primary IMC on hardness. The alloy microstructure is composed of a β-Sn dendritic region, surrounded by a eutectic mixture of α-Zn and β-Sn phases and the γ-Cu5Zn8 IMC. The eutectic interphase spacing varies in the range 1.2-3.6 μm, with the α-Zn phase having a globular morphology for ν 〉 0.5 mm/s and a needle-like morphology for ν 〈 0.3 mm/s. A modified Hall-Petch-type experimental expression relating hardness to the interphase spacing is proposed.

关键词： Sn-Zn-Cu solder alloy Solidification Microstructure Eutectic morphology Hardness

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

Practice Patterns and Adequacy of Maintenance Hemodialysis in Rio Grande, RS, Brazil

引用

Open Journal of Nephrology 2020年第2期10卷 102-116页

作者： luiz eduardo Corrê a Schein Juraci almeida Cesar Faculty of Medicine Federal University of Rio Grande Rio Grande Brazil Postgraduate Program in Health Sciences Faculty of Medicine Federal University of Rio Grande Rio Grande Brazil

Introduction: Hemodialysis is the most common end-stage renal disease treatment worldwide. Several factors may influence treatment outcomes. Adequacy (dose) of hemodialysis remains controversial;however, investigations on the effectiveness rate (Kt/V ≥ 1.2), which could reflect morbimortality, are preferred. Objective: This study aimed to describe the level of adequacy of hemodialysis among patients undergoing treatment in the city of Rio Grande (RS), Brazil. Method: In this prospective cohort study, 156 patients undergoing hemodialysis treatment between July 2016 and June 2017 in the two hemodialysis centers in the city of Rio Grande (RS), Brazil, were included. Frequency distribution as per Kt/V stratification was analyzed. Chi-square test was used to compare proportions. Results: Adequate hemodialysis (Kt/V ≥ 1.2) was observed in 105 patients (67%), 88% were from the municipality (mean age, 59 years), and 43% had visited the hospital before knowing about their kidney disease. Most of them were referred to a nephrologist (70%). Of the 156 patients, 114 patients (73%) remained in dialysis treatment, 10 (6%) underwent transplantation, 9 (6%) were transferred, and 23 (15%) died at the end of 12 months. Conclusion: Primary care should be expanded for early diagnosis of chronic kidney disease, improved venous access preparation, and increased number of patients with hemodialysis adequacy. Hemodialysis adequacy in patients undergoing treatment in the city of Rio Grande (RS), Brazil, needs to be improved.

关键词： Chronic Kidney Failure Hemodialysis Quality Control Hemodialysis Adequacy Arteriovenous Fistula

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

PET-modified red mud as catalysts for oxidative desulfurization reactions

引用

Journal of Environmental Sciences 2017年第7期29卷 312-320页

作者： Nayara T.do prado Ana P.Heitmann Herman S.Mansur Alexandra A.Mansur luiz C.A.Oliveira Cinthia S.de Castro department of Chemistry Federal University of Minas GeraisAv.Antonio Carlos 6627Campus Pampulha31270-901BH-MGBrazil department of Metallurgical and Materials Engineering Au.Antonio Carlos 6627Campus Pampulha31270-901BH-MGBrazil

This work describes the synthesis of catalysts based on red mud/polyethylene terephthalate（PET） composites and their subsequent heat treatment under N2 *** materials were characterized by scanning electron microscopy（SEM）,temperature programmed reduction（TPR）,Fourier transform infrared spectroscopy（FT–IR）,X-ray diffraction（XRD）,thermogravimetric（TG） analysis and N2adsorption/*** catalysts were evaluated in the oxidative desulfurization reaction of dibenzothiophene（DBT） in a biphasic *** results indicated that the PET impregnation on red mud increased the affinity of the catalyst with the nonpolar phase（fuel）,in which the contaminant was dissolved,allowing a higher conversion（up to 80%） and selectivity to the corresponding dibenzothiophene *** sulfone compound is more polar than DBT and diffused into the polar solvent as indicated by the data obtained via gas chromatography–mass spectrometry（GC–MS）.

关键词： Red mud PET Dibenzothiophene desulfurization Dibenzothiophene sulfone

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

Proactive reconciliation as a tool for integrating mining and milling operations

引用

International Journal of Mining Science and Technology 2019年第2期29卷 239-244页

作者： Ana Carolina Chieregati luiz eduardo Campos Pignatari Francis Fernand Pitard Homero delboni Jr department of Mining and Petroleum Engineering University of Sao Paulo EdeM Engenharia Mineral Francis Pitard Sampling Consultants

Historically, reconciliation has been viewed as a quality test of model estimates as well as a powerful tool for detecting and correcting problems in all stages of mine operations from resource estimation to metal production. If used correctly, reconciliation helps to better predict the life of mine(LOM), improves the adherence of production plans to the respective budget, and allows for effective control of the mining and milling processes. However, the accuracy of reconciliation results requires that all input data must be generated in accordance with the principles of sampling correctness. Furthermore, complete reconciliation systems can become extremely complex and must be carefully analyzed in order to provide realistic and helpful conclusions. Based on these concepts, this paper presents a successful proactive reconciliation system applied to a copper and gold mine in Brazil for monitoring and integrating mining and milling operations.

关键词： Reconciliation Prognostication Sampling Gold Copper

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

Chemical composition of Rosmarinus officinalis essential oil and antioxidant action against gastric damage induced by absolute ethanol in the rat

引用

Asian Pacific Journal of Tropical Biomedicine 2016年第8期6卷 677-681页

作者： Christiane Takayama Felipe Meira de-Faria Ana Cristina Alves de almeida Ricardo Jose Dunder Luis Paulo Manzo eduardo Augusto Rabelo Socca Leonia Maria Batista Marcos Jose Salvador Alba Regina Monteiro Souza-Brito Anderson luiz-Ferreira Functional and Structural Biology department Biology Institute Campinas State University Pharmacology department Faculty of Medical Sciences Campinas State University department of Pharmaceutical Sciences Federal University of Paraiba Plant Physiology department Biology Institute Campinas State University Federal University of Goias Institute of Biotechnology Nucleus of Biological Sciences Regional Catalao

Objective: To evaluate the antioxidant activity of the essential oil obtained from Rosmarinus officinalis(R. officinalis) in ethanol-induced gastric ulcer model in ***: The antioxidant properties of the essential oil obtained from R. officinalis were evaluated against gastric injury induced by absolute ethanol. Gastric tissues were prepared to enzymatic assays. The levels of glutathione, lipid peroxides, and the activities of glutathione peroxidase, superoxide dismutase and myeloperoxidase were ***: Ethanol produced severe hemorrhagic lesions in the stomach with ulcerative lesion of(140.2 ± 37.2) mm2. In animals pretreated with essential oil of R. officinalis(50 mg/kg, p.o.), a significant inhibition of mucosal injury of(21.2 ± 7.1) mm2(84%inhibition) was observed. The essential oil of R. officinalis protected the gastric mucosa probably by modulating the activities of the enzymes(superoxide dismutase and glutathione peroxidase) and increasing or maintaining the levels of glutathione. In addition,lipid peroxides levels were reduced. The essential oil of R. officinalis was analyzed by gas chromatography–mass spectrometer and the main constituents were cineole(28.5%),camphor(27.7%) and alpha-pinene(21.3%).Conclusions: We suggest that the monoterpenes present in the essential oil obtained from R. officinalis may be among the active principles responsible for the antioxidant activity shown by essential oil of R. officinalis.

关键词： Rosmarinus officinalis L. Antioxidant activity Gastric ulcer Antioxidant enzymes

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：