检索结果-南通市图书馆

Construction Processes Paradigm and Reinforcement Alternatives for Tailings Dam Soil

Journal of Environmental Protection 2023年第3期14卷 213-229页

作者： Magno André Oliveira Lucas Redoan Cecílio Campos marcela cristina costa branco Junia Lúcio de Castro Borges Gustavo Filemon costa Lima Alan Rodrigues Teixeira Machado Augusto Cesar da Silva Bezerra School of Mines Geotechnics Nucleus Federal University of Ouro Preto Ouro Preto Brazil Institute of Geosciences Federal University of Pará Belém Brazil Transport Engineering Department Federal Center for Technological Education of Minas Gerais Belo Horizonte Brazil Department of Geography Federal University of Minas Gerais Belo Horizonte Brazil Department of Exact Sciences University of the State of Minas Gerais João Monlevade Brazil

In the last decade, Brazil was the scene of two of the world’s biggest disasters related to mining tailings dams. The collapse of the Mariana and Brumadinho dams was catastrophic event that brought to light major environmental and humanitarian crises. Facts like this incite debate on the safety of dam construction methods and highlight the need for a broad discussion of dam safety legislation in the country. From the above, this paper promotes a review of various forms of construction of tailings dams and their associated problems, as well as discusses the techniques for soil reinforcement and their construction methods. The work also brings an overview of the Brazilian dams from April to July 2019, tracing the context of the Brazilian tailings dams months after the tragedy of Brumadinho. The methodology includes a robust literature review and discourse analysis. In Brazil, the number of ruptured dams is alarming, especially in the state of Minas Gerais, in which more than 7 have broken in the last two decades. Among the damages, the deaths impact society abruptly and were cataloged 455 deaths, of which 216 correspond to the rupture of the dam of the Córrego do Feijão mine in Brumadinho. To evaluate and diagnose a dam, one should consider ordinance N ° 70,389, 2017 revoked by Resolution ANM n ° 95, of February 7, 2022. In this context, in March 2019, we experienced several disturbing situations regarding dam instability in the state of Minas Gerais, being categorized as risky structures. To exemplify, one can cite dams classified as level 2 risk that became level 3. Due to the above facts, several studies are being conducted to improve soil aspects. For example, we highlight the increase in soil resistance that can be done using commercial and alternative materials available in the environment.

关键词： Dams Reinforcement Rupture Minas Gerais

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

Construction Processes Paradigm and Reinforcement Alternatives for Tailings Dam Soil

引用

Journal of Environmental Protection（环境保护） 2023年第3期

来源：博看期刊评论

在线全文

博看期刊

学校读者我要写书评

暂无评论

Distinct T helper cell-mediated antitumor immunity:T helper 2 cells in focus

引用

Cancer Pathogenesis and Therapy 2023年第1期1卷 76-86页

作者： Rafael Cardoso Maciel costa Silva marcela Freitas Lopes Leonardo Holanda Travassos Laboratory of Immunoreceptors and Signaling Carlos Chagas Filho Biophysics InstituteFederal University of Rio de JaneiroRio de Janeiro 21941-902Brazil Laboratory of Immunity Biology George DosReis Carlos Chagas Filho Biophysics InstituteFederal University of Rio de JaneiroRio de Janeiro 21941-902Brazil

The adaptive arm of the immune system is crucial for appropriate antitumor immune *** is generally accepted that clusters of differentiation 4^(+)(CD4^(+))T cells,which mediate T helper(Th)1 immunity(type 1 immunity),are the primary Th cell subtype associated with tumor *** this review,we discuss evidence showing that antitumor immunity and better prognosis can be associated with distinct Th cell subtypes in experimental mouse models and humans,with a focus on Th2 *** aim of this review is to provide an overview and understanding of the mechanisms associated with different tumor outcomes in the face of immune responses by focusing on the(1)site of tumor development,(2)tumor properties(i.e.,tumor metabolism and cytokine receptor expression),and(3)type of immune response that the tumor initially ***,we discuss how low-tolerance organs,such as lungs and brains,might benefit from a less tissue-destructive immune response mediated by Th2 *** addition,Th2 cells antitumor effects can be independent of CD8^(+)T cells,which would circumvent some of the immune escape mechanisms that tumor cells possess,like low expression of major histocompatibility-I(MHC-I).Finally,this review aims to stimulate further studies on the role of Th2 cells in antitumor immunity and briefly discusses emerging treatment options.

关键词： Cancer Immunology Adaptive immunity Immunotherapy Immunogenetics Antitumor immune response

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

Hyperbaric oxygen therapy as a complementary treatment for radiation proctitis:Useless or useful?-A literature review

引用

World Journal of Gastroenterology 2021年第27期27卷 4413-4428页

作者： Diogo Alpuim costa Carla Espiney Amaro Ana Nunes Joana Santos Cardoso Pedro Modas Daniel Isabel Rosa João Vieira branco Department of Haematology and Oncology CUF OncologiaLisboa 1998-018Portugal Centro de Medicina Subaquática e Hiperbárica(CMSH) Portuguese NavyLisboa 1649-020Portugal Centro de Investigação Naval(CINAV) Portuguese NavyBase Naval do AlfeiteAlmada 2810-001Portugal OVA Medical School Faculdade de Ciências MédicasLisboa 1169-056Portugal Department of Otorhinolaryngology Hospital das Forças Armadas(HFAR)Lisboa 1649-020Portugal Department of Gastroenterology Hospital das Forças Armadas(HFAR)Lisboa 1649-020Portugal Department of Vascular Surgery Centro Hospitalar Universitário de Lisboa CentralHospital de Santa MartaLisboa 1169-024Portugal Department of Intensive Care Unit Hospital das Forças Armadas(HFAR)Lisboa 1649-020Portugal Department of General Surgery Hospital das Forças Armadas(HFAR)Lisboa 1649-020Portugal

Radiotherapy(RT)is the backbone of multimodality treatment of more than half of cancer *** new modern RT techniques,late complications may occur such as radiation proctitis(RP).The natural history of RP is *** symptoms may resolve spontaneously or require conservative *** the other hand,for similar and uncomplicated clinical contexts,symptoms may persist and can even be refractory to the progressive increase in treatment *** the last decades,an enormous therapeutic armamentarium has been considered in RP,including hyperbaric oxygen therapy(HBOT).Currently,the evidence regarding the impact of HBOT on RP and its benefits is *** prospective and randomised studies are necessary to validate HBOT’s effectiveness in the‘real world’clinical *** article reviewed the relevant literature on pathophysiology,clinical presentation,different classifications and discuss RP management including a proposal for a therapeutic algorithm with a focus on HBOT.

关键词： Radiation proctitis Radiation proctopathy Radiotherapy Radio-induced lesion Late radiation tissue injury Delayed radiation injury Late sequelae Hyperbaric oxygen therapy Hyperbaric oxygen Review

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 growth and production modeling of individual trees of Eucalyptus urophylla plantations

引用

Journal of Forestry Research 2020年第5期31卷 1663-1672页

作者： Joao Victor Nobre Carrijo Ana Beatriz de Freitas Ferreira marcela costa Ferreira Mario Cesar de Aguiar Eder Pereira Miguel Eraldo Aparecido Trondoli Matricardi Alba Valeria Rezende Department of Forestry Faculty of TechnologyUniversity of Brası´liaBrası´lia 70910-900Brazil

Individual tree models(ITMs)are classified as growth and production models for projecting current and future forest *** are more complex than other growth and production models,show a higher level of detail and,consequently,produce a better modeling ***,the accuracy and efficiency of ITMs have not been properly assessed to *** this study,we estimated the growth in height,diameter,and individual tree volume of a Eucalyptus urophylla plantation by applying an *** used a continuing forest inventory dataset in which 1554 individual trees within 29 permanent plots were measured in the field over a 6-year period(24 to 72 months).Each individual tree volume was estimated for future tree *** achieve this,we adjusted the model to predict the height and diameter growth,and the probability of mortality as a function of the competition *** ITM accuracy was assessed based on the analysis of variance results and,subsequently,the multiple mean comparison test at the 5%significance *** tree volumes predicted by the ITM for the forest stand aged 72 months,beginning at ages 24,36,48,and 60 months,were compared to the field measured tree volume acquired from the 72-month forest inventory that was used as the reference *** and observed tree volumes were similar when the estimation was based on the 48-month forest *** results might help to reduce financial costs of forest inventory because the ITM produces accurate future predictions of forest stand *** estimated ITM for Eucalyptus plantations using measurement intervals up to 2 years is recommended because it significantly reduced the projected volume discrepancy compared to the field measurements.

关键词： Competition index Forest production Forest site Simulation models Tree mortality

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

Chlamydoconidium-producing Trichophyton tonsurans: Atypical morphological features of strains causing tinea capitis in Ceará, Brazil

引用

Asian Pacific Journal of Tropical Medicine 2019年第8期12卷 380-384页

作者： Raimunda Samia Nogueira Brilhante Germana costa Paixao Jonathas Sales de Oliveira Vandbergue Santos Pereira Marcos Fábio Gadelha Rocha Reginaldo Goncalves de Lima-Neto Débora de Souza Collares Maia Castelo-branco Rossana de Aguiar Cordeiro JoséJúlio costa Sidrim Specialized Medical Mycology Center Postgraduate Program in Medical MicrobiologyFederal University of CearáRua Nunes de Melo1315FortalezaBrazil Postgraduate Program in Veterinary Sciences State University of CearáAv.Dr.Silas Munguba1700FortalezaBrazil Department of Tropical Medicine Center for Health SciencesFederal University of PernambucoRecife-PEBrazil

Objective: To report atypical morphological features of Trichophyton(T.) tonsurans strains associated with tinea capitis. Methods: Eighty-two T. tonsurans strains isolated in Ceará, Brazil, were analyzed regarding macro and micromorphological features and nutritional patterns. Results: Fifty-two samples presented abundant chlamydoconidia, which were produced in chains. Macroscopically, these strains developed small glabrous colonies that were firmly attached to the surface of the culture medium, with few or no aerial mycelia and intense rusty yellow pigmentation. Seven strains did not grow with stimulus from thiamine. Samples were heterogeneous regarding urease production and none presented in vitro hair perforation. Conclusions: The observation of T. tonsurans strains with distinct phenotypic features indicates the need to revise the taxonomic criteria for routine identification of this dermatophyte.

关键词： Trichophyton tonsurans Chlamydoconidia Dermatophyte Phenotyping

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

Production of Lipase Using Cassava Peel and Sunflower Oil in Solid-State Fermentation： Preliminary Study

引用

Journal of Agricultural Science and Technology(A) 2013年第12期3卷 948-954页

作者： Caroline branco Gerber Francieli Kaufmann Gabrieli Nicoletti Marilia Dalla costa Aniela PintoKempka Volunteer Scholarship Holder of the Scientific Initiation Food Engineering Department State University of Santa CatarinaPinhalzinho 89870-000 Santa Catarina Brazil Food Engineering Department State University of Santa Catarina Pinhalzinho 89870-000 Santa Catarina Brazil

Full use of residues from industrial processes is a fundamental necessity of contemporary society, since it avoids impacts to the environment by using residues as inputs for other products of high economic and social importance. In this study, lipase production of the crude enzymatic extracts obtained by Aspergillus niger using cassava peel as substrate and sunflower oil as an inductor was investigated. The optimized cultivation temperature and concentration of inductor were determined using the response surface methodology. The two variables studied exercised influence in the production of lipase in the 95% level of confidence. The response surface obtained indicated that the conditions that maximize lipase activity production were 30.5 ~C and initial concentration of sunflower oil was 2.5% （w/w）. Through this analysis, it is evident that extremes in temperature and concentration of inductor tend to decrease lipase production, since low temperatures decrease metabolism and high temperatures may inactivate the lipase. Optimum lipase yield was 59.8 U/g of dry peel which was fermented for 60 h. Lipase production presents a peak of 61.3 U/g, at 72 h of fermentation. However, this value is statistically equal （p 〉 0.05） of the value of lipase activity obtained for 60 h and 84 h of fermentation.

关键词： Cassava peel lipase production solid-state fermentation sunflower oil.

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

Brackish Shrimp Farming in Northeastern Brazil: The Environmental and Socio-Economic Impacts and Sustainability

引用

Natural Resources 2013年第8期4卷 538-550页

作者： Tadeu Dote Sá Rommel Rocha de Sousa ítalo Régis Castelo branco Rocha Gutemberg costa de Lima Francisco Hiran Farias costa Department of Fishing Engineering Campus do Pici Federal University of Ceará Fortaleza Brazil Geoconsult—Geology and Environment Consulting Fortaleza Brazil

Despite the economic importance of farmed shrimp, a number of technical, environmental, economic and social problems have been widely reported in the international literature. This paper focuses on the environmental and socio-economic impacts of semi-intensive and intensive shrimp farming in the coastal region of Northeastern Brazil and the identification of options for sustainable production. In this Region, the total area dedicated to shrimp farming is approximately 18,500 ha, of which 5750 ha are located in Ceará State. The estuary of Jaguaribe river has the largest number of shrimp farms in the state of Ceará. Currently, the industry has 64 participating farms with a total area dedicated to shrimp farming of 2411.3 ha. In 2011, the total production was 13,110 tons of shrimp with an average yield of 6330 kg ***-1 in a pond area of 2071.2 ha. This industry employs 2350 people that represent 23.2% of jobs generated in the two municipalities where the Jaguaribe river estuary is inserted. Compared with other countries, Brazil has reduced its exports due to high cost inputs for shrimp farming. However, the Brazilian shrimp industry has benefited from high domestic prices, despite the decreases in international price of shrimp. In 2011, the prices for size category ranged between U$ 4.67 - 6.04 for 80/100 (count of head-on shrimp), U$ 4.95 - 6.60 for 70/80 and U$ 5.

关键词： Shrimp Farm Mangroves Impacts Environmental Penaeus vannamei

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

Clinical and environmental isolates of Burkholderia pseudomallei from Brazil: Genotyping and detection of virulence gene

引用

Asian Pacific Journal of Tropical Medicine 2017年第10期10卷 945-951页

作者： Tereza de Jesus Pinheiro Gomes Bandeira Debora de Souza Collares Maia Castelo-branco Marcos Fabio Gadelha Rocha Rossana de Aguiar Cordeiro Crister Jose Ocadaque Manoel de Araújo Neto Paiva Raimunda Samia Nogueira Brilhante Jose Júlio costa Sidrim Specialized Medical Mycology Center Postgraduate Program in Medical Microbiology Federal University of Ceará Christus School of Medicine Postgraduate Program in Veterinary Sciences State University of Ceará Federal Institute of Education Science and Technology of Ceará

Objective: To evaluate the genetic diversity of clinical and environmental isolates of Burkholderia pseudomallei(***) recovered in Ceara, Brazil, and screen these isolates for the presence of type three secretion system virulence ***: Nineteen *** isolates(9 from clinical cases and 10 from soils)were *** amplified polymorphic DNA was performed with primers OPQ-2, OPQ-4 and OPQ-16 to evaluate the genetic diversity, and type three secretion system gene was detected through polymerase chain ***: Random amplified polymorphic DNA showed a genetic relatedness of approximately 50% among the tested *** isolates, which were grouped into two clades, of which the biggest ones comprised 18/19 isolates for primer OPQ-2, and 17/19 isolates for primer *** OPQ-4 grouped the isolates into three clades comprising 1/19, 3/19 and 15/19 ***, type three secretion system gene was detected in all tested ***: This is an effort to type *** strains from Ceara, which is important for better understanding this pathogen, contributing for the epidemiological surveillance of melioidosis in this endemic region.

关键词： Burkholderia pseudomallei Melioidosis RAPD TTSS gene

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

Biofilm analyses and exoproduct release by clinical and environmental isolates of Burkholderia pseudomallei from Brazil

引用

Asian Pacific Journal of Tropical Medicine 2023年第7期16卷 321-328页

作者： Glaucia Morgana de Melo Guedes Crister JoséOcadaque Alyne Soares Freitas Rodrigo Machado Pinheiro Giovanna Barbosa Riello Silviane Praciano Bandeira Rossana de Aguiar Cordeiro Marcos Fábio Gadelha Rocha JoséJúlio costa Sidrim Débora de Souza Collares Maia Castelo-branco Department of Pathology and Legal Medicine Postgraduate Program in Medical MicrobiologyGroup of Applied Medical MicrobiologyFederal University of CearáFortalezaCEBrazil Department of Clinical and Toxicological Analysis School of PharmacyFederal University of CearáFortalezaCEBrazil Department of Pathology and Legal Medicine Postgraduate Program in Medical MicrobiologyLaboratory of Emerging and Reemerging PathogensFederal University of CearáFortalezaCEBrazil School of Veterinary Medicine Postgraduate Program in Veterinary SciencesState University of CearáFortalezaCEBrazil

Objective:To characterize biofilm production by clinical(n=21)and environmental(n=11)isolates of Burkholderia pseudomallei and evaluate the production of proteases,hemolysins and ***:Initially,the 32 strains were evaluated for biofilm production in Müller-Hinton broth-1%glucose(MH-1%glucose)and BHI broth-1%glucose,using the crystal violet staining ***,growing(48 h)and mature(72 h)biofilms were evaluated by confocal ***,the production of proteases,hemolysins and siderophores by planktonic aggregates,growing biofilms and mature biofilms was ***:All isolates produced biofilms,but clinical isolates had significantly higher biomass in both MH-1%glucose(P<0.001)and BHI-glucose 1%(P=0.005).The structural analyses by confocal microscopy showed thick biofilms,composed of multiple layers of cells,homogeneously arranged,with mature biofilms of clinical isolates presenting higher biomass(P=0.019)and thickness of the entire area(P=0.029),and lower roughness coefficient(P=0.007)than those of environmental *** production by growing biofilms was significantly greater than that of planktonic(P<0.001)and mature biofilms(P<0.001).Hemolysin release by planktonic aggregates was higher than that of biofilms(P<0.001).Regarding siderophores,mature biofilms presented higher production than growing biofilms(P<0.001)and planktonic aggregates(P<0.001).Conclusions:Clinical isolates have higher production of biofilms than their environmental counterparts;protease and siderophores seem important for growth and maintenance of Burkholderia pseudomallei biofilms.

关键词： Mangosteen Burkholderia pseudomallei Biofilms Proteases Hemolysins Siderophores

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：