检索结果-南通市图书馆

Influence of Tomographic Slice Thickness and Field of View Variation on the Reproduction of Thin Bone Structures for Rapid Prototyping Purposes-An in Vitro Study

引用

Open Journal of Radiology 2013年第1期3卷 12-25页

作者： Maria Ines Meurer kivia pires souza Aldo von Wangenheim Daniel Duarte Abdala Luis Felipe de souza Nobre Eduardo Meurer Jorge Vicente Lopes da Silva Department of Pathology Federal University of Santa CatarinaFlorianopolisBrazil Postgraduate Programme on Dento-Maxillo-Facial Radiology Health Sciences CenterFederal University of Santa CatarinaFlorianopolisBrazil Brazilian Institute for Digital Convergence Federal University of Santa CatarinaFlorianopolisBrazil Department of Computer Sciences Federal University of UberlandiaUberlandiaBrazil Department of Clinical Medicine Federal University of Santa CatarinaFlorianopolisBrazil Oral and Maxillofacial Surgery Homero de Miranda Gomes Regional HospitalSao JoseBrazil Renato Archer Center for Information Technology CampinasBrazil

This study assessed the influence of acquisition parameters of tomographic volumes on the reproduction of thin bone structures for rapid prototyping purposes. Two parameters were investigated: Field of View (FOV) and Slice Thickness (ST). The specimen was comprised of five pairs of 0.6 mm, 1.1 mm, 1.5 mm, 2.0 mm and 2.8 mm thick cortical bone plates. The plates were stuck into utility wax;the first plate of the pair was in vertical position while the second plate was oblique to the first one. Forty-five tomographic images were captured and separated into 3 groups of fifteen images. Each group had a specific FOV: 180 mm;250 mm and 430 mm, respectively. Within each of these three groups, tomographic slice thickness was varied for every five of the fifteen slices. Acquisitions were carried out with STs of 1 mm, 2.5 mm and 5 mm. The Cyclops Medical Station software was used in the voxel-to-voxel analysis of radiologic density, reaching a total of 1350 assessed images. ST and FOV variation influenced the reproduction of thin bone walls, and FOV was shown to be a very important parameter. The larger the acquisition FOV, the more reduction in the number of voxels within the range of reconstruction for cortical bone in all of the bone plates. The visual analysis of the images of very thin bone walls showed that there could be a sharp drop in the radiologic density value in several adjacent voxels, resulting in areas which might not be reproduced in the reconstruction.

关键词： Computed Tomography Rapid Prototyping Medical Rapid Prototyping Model

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

Assessment of Vulnerability of Oxisols to Compaction in the Cerrado Region of Brazil

引用

Pedosphere 2010年第2期20卷 252-260页

作者： A.E.AJAYI M.S.DIAS JUNIOR N.CURI A.OKUNOLA T.T.TEIXEIRA souza B.SILVA pires Department of Agricultural Engineering Federal University of Technology Departamento de Ci encia do Solo Universidade Federal de Lavras Federal College of Agriculture Fundacao de Ensino Superior de Passos Universidade do Estado do Minas Gerais

The Cerrado region of Brazil,one of the fastest-growing agricultural areas in the world,is undergoing very rapid mechanization;this development is good for the country's economy but may also snowball into substantial loss of agricultural land and other environmental degradation if the soil susceptibility and vulnerability to compaction is not well *** this study we explored different techniques for estimating soil intrinsic abilities to withstand applied pressure using the prevalent Oxisols of the Cerrado region under native *** samples were collected from three sites within the region and subjected to 1) compressibility test;2) manual penetration resistance test;3) automated penetration resistance test;and 4) packing density *** four methods produced analogous *** results showed the significant influence of soil structure on the inherent strength and compaction susceptibility of the *** also established the association of soil structure with the mineralogy of the *** is noteworthy that the packing density which was developed from very simple and easily obtained parameters could give a picture of the tendency of the soil to ***,this approach would be useful in developing compaction susceptibility maps for the *** could be concluded that most of the Oxisols in the Cerrado region would support mechanized agricultural production very ***,there is need for careful management of the mechanization process to avert *** management techniques should include conservationist practices such as no till in order to maintain as much as possible the favorable structure and drainage of these very old soils.

关键词： compressibility packing density penetration resistance soil structure

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

A Study of Degradation in Vegetable Oils by Exposure to Sunlight Using Fourier Transform Infrared Spectroscopy

引用

Materials Sciences and Applications 2020年第10期11卷 678-691页

作者： Thiago Reixach pires de souza Laudilene Olenka Wilson Sacchi Peternella Department of Chemistry Federal University of Rond&ocirc nia Campus José Ribeiro Filho Porto Velho State of Rond&ocirc nia Brazil Department of Physics Federal University of Rond&ocirc nia Campus José Ribeiro Filho Porto Velho State of Rond&ocirc nia Brazil

There are a diversity and variability of oil producing plants and different extraction methods. These vegetable and essential oils are substances stored and released by plants from their fruits, leaves, flowers, bark and stem, being complete of plant origin that provides some benefits. In the plant these oils are also known as antioxidant substances, which have the function of natural protection. It is known that the extraction method has a strong influence on its quality and composition due to its variability and environmental conditions, besides possible adulteration. Oils that are rich in polyunsaturated fatty acids are the most relevant to the cosmetic industry but are most sensitive to oxidation. The oxidation of these oils generates what is known as rancidity, with the presence of smaller and undesirable molecules, thus reducing the quality of the oil beyond its nutritional value, making them harmful to human health. Stocking conditions, such as exposure to sunlight and heat, are major phenomena that accelerate the degradation of these oils. Infrared spectrometry with Fourier transform (FTIR) is a tool with potential to evaluate the degradation effect of vegetable oils. Infrared spectra of Almond (Prunus dulcis), Andiroba (Carapa guianensis aubl.), Copaíba (Copaifera langsdorffi) and Rosehip (Rosa aff. Rubiginosa) oils before and after exposure to sun light for 90 days were analyzed, with objective of evaluating the effect of the degradation on the composition of the oil, which were acquired in local commerce of the city Porto Velho. The spectra trends show the occurrence of oxidation, with the reduction of unsaturation, in addition to the fractionation of carbon chains and appearance of functional groups such as aldehyde and alcohol.

关键词： Vegetable Oil Oxidation Unsaturation FTIR

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

Disentangling spatial,environmental and historical effects on tropical forest tree species turnover

引用

Journal of Plant Ecology 2021年第4期14卷 717-729页

作者： Alisson Borges Miranda Santos Vinicius Andrade Maia Cleber Rodrigo de souza Nathalle Cristine Alencar Fagundes Fernanda Moreira Gianasi Aurelio de Jesus Rodrigues Pais Natalia de Aguiar-Campos Gabriela Gomes pires Diego Teixeira Girardelli Jean Daniel Morel Mariana Caroline Moreira Morelli Felipe de Carvalho Araujo Rubens Manoel dos Santos Department of Forestry Sciences Federal University of LavrasUniversity CampusLavrasBrazil Biological Sciences University of the State of Minas GeraisItuiutaba UnitItuiutabaBrazil Department of Biology Federal University of LavrasUniversity CampusLavrasBrazil Faculty of Environmental Engineering and Natural Resources Zambeze UniversityChimoioMozambique

Aims We aimed at disentangling the effects of spatial distance,current and past environmental dissimilarity,and their combinations on tree community taxonomic and phylogenetic turnover by addressing the following questions:(i)Is tree community taxonomic and phylogenetic turnover related to the indirect effects of spatial distance via environmental dissimilarity?(ii)Does tree community taxonomic and phylogenetic turnover respond to paleoclimate(Last Glacial Maximum and Mid-Holocene)?Methods The study was carried out in 14 Atlantic rainforest sites in Brazil(20.4 ha sampled)containing 615 tree species from 83 plant *** obtained plot-level geographic coordinates and soil variables and site-level bioclimatic variables in the current,Mid-Holocene and Last Glacial *** used structural equation models with a distance-based approach to(i)test the direct effects of spatial distance and environmental dissimilarity and(ii)test the indirect effects of spatial distance via environmental dissimilarity on taxonomic(Bray–Curtis distance)and phylogenetic turnover(Comdist and Comdistnt distances).Important Findings Our results suggest a weak indirect effect of spatial distance via environmental dissimilarity on taxonomic and phylogenetic *** community turnover was driven by the direct effects of neutral,niche-based and historical ***,we inferred that the paleoclimate(historical processes)promoted the selection of the clades that gave rise to the current flora,while spatial distances(neutral processes)limited the dispersal range of species from the regional pool and environmental conditions(niche-based processes)locally selected the taxa that are able to persist.

关键词： assembly processes phylogenetic communities environmental filtering neutral communities phylogenetic turnover ecological niche paleoclimate effects

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

Enteroparasitoses in Patients with Rheumatoid Arthritis

引用

Advances in Infectious Diseases 2017年第4期7卷 143-152页

作者： Ana Paula Monteiro Gomides Alex Luiz de Oliveira pires Cleandro pires Albuquerque Talita Yokoy de souza Luciana Muniz Caliandra Maria Bezerra Luna Lima Leopoldo Luiz Santos-Neto Licia Maria Henrique da Mota Universidade de Brasília (UnB) Brasília Brazil Universidade Federal da Paraíba Jo&#227 o Pessoa Brazil

Background: Patients with rheumatic diseases have profound alterations in the immune system as a result of underlying diseases and the treatments used, which increases the risk of occurrence and severity of infections, including enteroparasitosis. The current treatment for rheumatoid arthritis involves immunosuppressive therapies powerfully needed for screening infectious processes. The prevalence of parasitic infections in rheumatoid arthritis patients is not currently documented in literature. The objective of the current study was to determine the prevalence of parasitic diseases in a population with RA. Methods: We collected demographic and socioeconomic data from 67 patients at the Hospital Universitário de Brasília from July 2015 to April 2016. All patients underwent a parasitological examination of their stool and multiple variables were analyzed using Poisson regression method. Results: The mean age of patients was 53.9 years. They were predominantly in women (94%) and caucasian (47.8%). The mean disease duration was 9.2 years and most patients had the disease in remission or light activity. The prevalence of parasitic infections in these patients was 11.9%, all cases being that of protozoa of the following species: Endolimax nana, Entamoeba histolytica and Entamoeba coli. The final multivariate analysis indicated that the presence of disease had a significant statistical relationship between the presence of enteroparasitosis and rheumatoid arthritis with no fatigue by VAS (p = 0.0488) and best current health index by VAS (p = 0.0012). Conclusion: This study indicates that the prevalence of enteroparasitoses in a population with Rheumatoid Arthritis was 11.9% and all cases were found of protozoa.

关键词： Parasitic Infections Rheumatoid Arthritis Protozoosis Enteroparasitoses Intestinal Infection

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

Different Approaches on the Investigation of Ground Water

引用

Journal of Earth Science and Engineering 2018年第1期8卷 39-49页

作者： Cassio Stein Moura Roberto Heemann Moises Razeira Daniela Govoni Sotelo Gabriela Borges Soares Giovanna Ramos Garcez Jfilio Cesar Gall pires Vanessa da Conceicao Osorio Heldiane souza dos Santos Institute of Petroleum and Natural Resources Pontifical University of Rio Grande do Sul Porto Alegre 90619-900 Brazil Federal University of the Pampa Cacapava do Sul 96570-000 Av. lpiranga 6681 Predio 96 J Porto Alegre RS Brazil

In this paper we discuss ways to obtain information about the quality of ground water and their availability. We classify the different approaches in two categories： geophysical methods, e.g., electroresistivity sounding, seismic survey, gravimetry, MT （magnetotelluric） method, and geochemical methods. The former ones are able to provide information on the geological structure,meaning depth, range, amount of water and possible connections among different exploration areas or regions at risk due to contamination. On the other hand, the last ones provide information about the quality of water and the possible of use for agriculture, industry or human consumption. As a case study we aim at the Guarani Aquifer, more specifically at its recharge zone on the southern rim.

关键词： Drought ground water geophysics geochemistry.

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

Germination,Vigor of Seeds and Emergence of Fabaceae Seedling in Bovine Faeces

引用

American Journal of Plant Sciences 2014年第14期5卷 2170-2177页

作者： Renata Vianna Lima Henrique Duarte Vieira Francielle de souza Guimaraes Nardele Moreno Rohem Jr. Tatiana Oliveira da Silva Alberto Magno Fernandes Cynthia pires Guimaraes Amanda Justino Acha Bruno Borges Deminicis Department of Fitotecnia State University of North Fluminense Darcy Ribeiro(UENF)Campos dos GoytacazesRio de JaneiroBrazil Department of Zootecnia State University of North Fluminense Darcy Ribeiro(UENF)Campos dos GoytacazesRio de JaneiroBrazil

This study was conducted to evaluate the physiological quality of forage seeds after passage through the gastrointestinal tract of cattle, as well as the emergence of seedlings derived from these seeds. Three Fabaceae species were used: tropical kudzu, leucaena and calopo. One hundred grams of seeds of each species were offered, separately, to five bovines. After the start of the dispersion, the faeces of the animals were collected every 6 hours, in a total of 72 hours, being taken to the greenhouse immediately after each collection. The study evaluated the total number of seedlings in the stool, the lengths of roots and aerial parts, as well as the natural and dry seedling weight thirty days after the disposal of the faeces in the greenhouse. The experimental design consisted of randomized blocks, with twelve treatments (sampling periods) and five replications (cattle). The best performance for the total number of seedlings in the faeces of cattle was observed in the kudzu species. The length of the root, length of the aerial part and dry matter seedling weight was observed in the leucaena species, followed by kudzu. The calopo showed low results for all variables due to the high degradation of the seeds.

关键词： Pueraria phaseoloides Leucaena leucocephala Calopogonium mucunoides Dispersal Physiological Quality

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

Effects of Exercise Training on Endothelial Function,Arterial Structure,and Physical Conditioning in Patients with Systemic Autoimmune Myopathies:A Case Series Study

引用

Open Journal of Rheumatology and Autoimmune Diseases 2019年第2期9卷 57-68页

作者： Rafael Giovani Misse Isabela Bruna pires Borges Alexandre Moura dos Santos Diego Sales de Oliveira Jean Marcos de souza Bruno Gualano Valéria Aparecida Costa Hong Luis Aparecido Bortolotto Samuel Katsuyuki Shinjo Faculdade de Medicina FMUSP Universidade de Sao Paulo SP Brazil Hypertension Unit Instituto do Coracao Hospital das Clinicas HCFMUSP Faculdade de Medicina Universidade de Sao Paulo SP Brazil

Introduction. Exercise training has been effective in improving endothelial function and decreasing arterial stiffness in several systemic autoimmune diseases. However, to date, no studies have assessed patients with systemic autoimmune myopathies (SAM). Methods. Five female patients with definite SAM (3 dermatomyositis and 2 polymyositis) who underwent a 12-week, twice-a-week, exercise training program were assessed prospectively. The following parameters were assessed: endothelial function measured by flow-mediated dilatation (FMD), carotid femoral by pulse wave velocity (PWV), disease status by International Myositis Assessment & Clinical Studies Group (IMACS) set score, the ventilatory anaerobic threefold (VAT), respiratory compensation point (RCP), maximum effort (ME), maximal oxygen uptake (VO2max) measured by ergospyrometer, and strength and muscle function. Results. Mean age of the patients and duration of disease were 43.9 and 10.5 years, respectively. The median FMD and PWV were 10.2% and 7.1 m/s. After exercise training, important FMD reduction was observed in 4 out of 5 patients, whereas the PWV parameters decreased in only 2 out of 5 patients. The exercise training was safe, without clinical intercurrences or disease relapses. Moreover, an increase in strength and functionality was observed. Concerning aerobic capacity, there was a decrease in the VAT and an increase in ME, without al-terations in the maximum oxygen consumption. Conclusions. In general, exercise training does not alter endothelial function and PWV values, but improves muscle strength and function and also, does not lead to disease reactivation (Clinical Trials (NCT03092167)).

关键词： Dermatomyositis Endothelial Function Exercise Polymyositis Pulse Wave Velocity

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

Acute Appendicitis after Liver Transplant: A Case Report and Review of the Literature

引用

Open Journal of Organ Transplant Surgery 2014年第4期4卷 29-32页

作者： Ronaldo de Oliveira Andrade Rodrigo da Silva pires Raul évora Silva Felipe Pedreira Tavares de Mello Cláudia Cristina Tavares de Sousa Samanta Teixeira Basto Eduardo de souza Martins Fernandes Department of Surgery and Liver Transplant Hospital Adventista Silvestre Rio de Janeiro Brazil

Acute appendicitis is rare in the postoperative period of liver transplantation;only 23 cases were described in the literature to date, including late and immediate postoperative. Our case reports a patient who was presented with acute appendicitis in the immediate post-transplant and died in the subsequent postoperative period. The article reviews the available literature and all cases known until now, commenting on incidence, casual factors, symptoms, diagnostic and management.

关键词： Appendicitis Complications Early Postoperative Liver Transplantation

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 Outcomes of Positive Newborns for COVID-19 in Rio de Janeiro, Brazil

引用

Open Journal of Obstetrics and Gynecology 2021年第12期11卷 1851-1861页

作者： Karina Martins-Cardoso Luana Ferreira Martins de Toledo Juliana Aparecida souza Paz Andressa Rangel de Oliveira Lima Thaís Chrispim de souza Giangiarulo Jéssica da Silva Oliveira IPB COVID Workgroup Carla Carolina Teixeira Jones Zitenfeld Cardia Neto Giovanna Geórgia pires Carrilho Vallim Shana Priscila Coutinho Barroso Laboratório de Biologia Molecular Instituto de Pesquisas Biomédicas Hospital Naval Marcílio Dias Rio de Janeiro Brasil Instituto de Bioquímica Médica Leopoldo de Meis Universidade Federal do Rio de Janeiro Rio de Janeiro Brasil UTI neonatal Clínica de Pediatria Hospital Naval Marcílio Dias Rio de Janeiro Brasil Serviç o de Patologia Hospital Naval Marcílio Dias Rio de Janeiro Brasil

The disease caused by the SARS-CoV-2 virus has spread very rapidly throughout the world, causing various clinical manifestations and affecting several organs and systems. However, the possibility of vertical transmission of COVID-19 in symptomatic pregnant women has been questioned. The aim of this work was to report cases of possible vertical transmission in pregnant women affected by the SARS-CoV-2 virus, as well as its clinical repercussions on the newborn. In this paper, we conducted a cross-sectional retrospective study by analyzing medical records of pregnant women admitted at the military hospital, in Rio de Janeiro, Brazil, diagnosed with COVID-19 and who had positive newborns. To evaluate epidemiological data, clinical manifestations, laboratorial and histopathological changes were related to such vertical transmission. Only six tested newborns were positive for COVID-19. The mothers had no respiratory symptoms, and the gestational age was at term, except for one newborn born prematurely due to detection of pericadial effusion. Three neonates had respiratory symptoms, requiring ventilatory support. None of the mothers or newborns died. During the pandemic, possible vertical transmission cases of infected pregnant women in the third trimester of pregnancy were observed. According to the case reports published in the literature, they illustrate phenotypes of neonatal involvement with varied clinical manifestations and severity;however, further scientific studies are needed to prove the effective vertical transmission of SARS-CoV-2 in positive pregnant women.

关键词： SARS-CoV-2 Infection Neonatal Outcomes Vertical Transmission

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：