检索结果-南通市图书馆

Micromorphology of Surface crusts in the Knersvlakte,South Africa

Journal of Mountain Science 2009年第2期6卷 189-196页

作者： Sarah-jane c.Fox Anthony J.Mills Rosa M.Poch Department of Soil Science Stellenbosch UniversityStellenbosch South Africa Department of Environment and Soil Science University of LleidaRovira Roure 191 Lleida

Soils in the Knersvlakte are particularly prone to crusting and have lower inherent infiltrability than other soils across western southern Africa. Micromorphological techniques were used to examine the structure and porosity of soil crusts in the Knersvlakte to ascertain why crusting is so intense in this region. Quantile regression using boundary lines was employed to examine the relationships between infiltrability and soil properties for all samples （n = 67）. This analysis showed that infiltrability is potentially maximal at low water- dispersible ＇clay plus silt＇ content and low silt content （r^2 = 0.72 and 0.64; respectively, n = 67）（Figure 2）. The strength of crusts, pH, Ec, clay mineralogy, and water-dispersible clay, silt and ＇clay plus silt＇ content were compared, and a pore analysis using optical microscopy was undertaken on images of six soil thin sections （n = 6）（circular and parallel polarizers）. Pore analysis was further undertaken on five horizontal slices of equal dimensions taken through each soil thin section. The porosity samples with low infiltrability （〈 100 mm·hr^-1, n = 4） had greater crust strength, lower porosity （both total and in the least porous slice） and greater water-dispersible ＇day plus silt＇ and silt content than the porosity samples with high infiltrability （〉 100mm·hr^-1, n = 2）. The porosity samples with low infiltrability showed a trend of lower pH and greater water dispersible clay percentage. Porosity varied within the porosity samples due to the presence of dense clay/silt bands （〈 0.5 mm in width） with relatively few air vesicles. The porosity samples with horizontal slices of low porosity （but large numbers of air vesicles） had low infiltrability, while those without slices of low porosity （and relatively few air vesicles） had high infiltrability. We conclude that the intense crusting and resultant low infiltrability of soils in the Knersvlakte appears to be related to the formation of thin, dense clay/silt bands in the

关键词： Infiltrability optical microscopy porosity air vesicles

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

Morphology and viability of adult Fasciola gigantica(giant liver flukes) from Philippine carabaos(Bubalus bubalis) upon in vitro exposure to lead

引用

Asian Pacific Journal of Tropical Biomedicine 2015年第6期5卷 491-493页

作者： Aimee caye G. chang Mary jane c. Flores Biology Department College of Science De La Salle University

Objective: To evaluate the effects of lead in the morphology and viability of Fasciola gigantica(F. gigantica)(giant liver fluke) isolated from infected livers of carabaos in vitro using the following concentrations of lead: 0, 100, 150 and 200 mg/L. Methods: In vitro viability and motility assay was conducted to evaluate the ef ects of lead using 1% methylene blue as the vital dye for assessment of the l ukes' viability. Results: Results indicate that F. gigantica can tolerate lead exposure as high as 200 mg/L with visible morphological variations. Upon exposure to lead, liver l ukes tend to curl and excrete black precipitates as a sign of physiological stress response. Furthermore, the lethal concentration(Lc50) of lead against F. gigantica in vitro was 160 mg/L. conclusions: In conclusion, tolerance of liver flukes to high levels of lead suggests its potential as a possible biomarker of environmental pollution.

关键词： Fasciola gigantica Giant liver fluke carabaos Heavy metal Lead Lc50 Philippines

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

SARS-coV-2 variants are associated with different clinical courses in children with MIS-c

引用

World Journal of Pediatrics 2024年第2期20卷 143-152页

作者： Andres F.Moreno Rojas Emelia Bainto Helen Harvey Adriana H.Tremoulet jane c.Burns Kirsten B.Dummer Department of Pediatrics Division of Pediatric CardiologyUniversity of California San Diegoand Rady Children’s Hospital3020 Children’s Way MC 5004San DiegoCA 92123USA Kawasaki Disease Research center La JollaCAUSA Department of Pediatrics Division of Pediatric Critical CareUniversity of California San Diegoand Rady Children’s HospitalSan DiegoCAUSA Department of Pediatrics University of California San Diegoand Rady Children’s HospitalSan DiegoCAUSA

Background Recent infection with SARS‑coV-2 in children has been associated with multisystem inflammatory syndrome in children(MIS-c).SARS‑coV-2 has undergone different *** publications exist about specific variants and their correlation with the severity of *** This was a single-center,retrospective study including all patients admitted with MIS-c at Rady children’s Hospital-San Diego between May 2020 and March *** epidemiologic data,including viral genomic information,were obtained from public ***,clinical presentation,laboratory values,and outcomes were obtained from electronic medical *** The analysis included 104 pediatric *** MIS-c waves were *** variants in San Diego during the first wave included clades 20A to *** the second wave,there were variants from clades 20A to c,20G,21c(Epsilon),20I(Alpha),and 20J(Gamma).The third wave had Delta strains(clades 21A,21I,and 21J),and the fourth had Omicron variants(clades 21K,21L,and 22c).MIS-c presented with similar symptoms and laboratory findings across all *** patients were admitted to the pediatric intensive care unit(PIcU)(74%)and required inotropic support(63%)during the second *** of the patients required mechanical circulatory support,and only two required invasive ventilatory *** was no *** The various strains of SARS-coV-2 triggered MIS-c with differing severities,with the second wave having a more severe clinical *** the differences in disease severity across variants were due to changes in the virus or other factors remains unknown.

关键词： complications cOVID-19 MIS-c SARS-coV-2 variants

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

comparing posture induced intraocular pressure variations in normal subjects and glaucoma patients

引用

International Journal of Ophthalmology(English edition) 2021年第3期14卷 399-404页

作者： Onyekachi jane Ireka chimdia E Ogbonnaya Obinna c Arinze Nneka Ogbu chimdi M chuka-Okosa Department of Ophthalmology Alex Ekwueme Federal University Teaching HospitalAbakalikiEbonyi State 48028Nigeria Department of Ophthalmology University of Nigeria Teaching HospitalItuku OzallaEnugu 01129Nigeria

AIM:To compare the posture-induced variations in intraocular pressure(IOP)between the primary open angle glaucoma(POAG)and non-glaucomatous ***:A case-controlled age matched study was conducted in 55 successive newly diagnosed POAG and 56 non-glaucomatous patients seen in glaucoma clinic and general outpatient eye clinic in the Alex Ekwueme University Teaching Hospital,*** IOPs of eligible correspondents were measured with Perkin’s hand-held tonometer in the sitting,supine flat and supine with pillow positions *** of IOP in each position was done after 15 min of assuming such ***:The IOP difference between the sitting and supine flat position was significantly higher in the POAG than non-glaucoma subjects(7.68±2.08 vs 4.03±0.13 mm Hg,Pce between the sitting and supine with pillow positions was 2.61±1.49 mm Hg for POAG and 1.44±0.70 mm Hg in non-glaucoma(Pce between supine flat and supine with pillow positions was 5.07±2.24 mm Hg in POAG and 2.59±0.66 mm Hg in non-glaucomatous patients(PcONcLUSION:Greater variations in posture induced IOP occurred in POAG patients than *** posture induced IOP variation is lowest in the sitting position and highest in the supine flat *** of posture induced IOP changes may be an important tool in the management of glaucoma.

关键词： primary open angle glaucoma non-glaucoma intraocular pressure sitting position supine position

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

Potato aphid Macrosiphum euphorbiae performance is determined by aphid genotype and not mycorrhizal fungi or water availability

引用

Insect Science 2017年第6期24卷 1015-1024页

作者： Alison jane Karley Matthew Emslie-Smith Alison Elizabeth Bennett Ecological Sciences The James Hutton Institute Invergowrie Dundee UK School of Biology University of St. Andrews St Andrews UK

Intra- and interspecific variation in plant and insect traits can alter the strength and direction of insect-plant interactions, with outcomes modified by soil biotic and abiotic conditions. We used the potato aphid （Macrosiphum euphorbiae Thomas） feeding on cultivated Solanum tuberosum and wild Solanurn berthaulti to study the impact of water availability and plant mutualistic arbuscular mycorrhizal （AM） fungi on aphid performance and susceptibility to a parasitoid wasp （Aphidius ervi Haliday）. Plants were grown under glass with live or sterile AM fungal spores and supplied with sufficient or reduced water supply. Plants were infested with 1 of 3 genotypes ofM. euphorbiae or maintained as aphidfree controls; aphid abundance was scored after 1 week, after which aphid susceptibility to A. ervi was assayed explanta. Solarium tuberosum accumulated c. 20% more dry mass than S. berthaultii, and root mass of S. berthaultii was smallest under reduced water supply in the presence of AM fungi. Aphid abundance was lowest on S. berthaultii and highest for genotype ＂2＂ aphids; genotype ＂1＂ aphid density was particularly reduced on S. berthaultii. Aphid genotype ＂1＂ exhibited low susceptibility to parasitism and was attacked less frequently than the other two more susceptible aphid genotypes. Neither AM fungi nor water availability affected insect performance. Our study suggests a fitness trade-offin M. euphorbiae between parasitism resistance and aphid performance on poor quality Solarium hosts that warrants further exploration, and indicates the importance of accounting for genotype identity in determining the outcome of multitrophic interactions.

关键词： Aphidius ervi arbuscular mycorrhizal fungi multitrophic interaction parasitism resistance Solanum spp.

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

characterization of Fusobacterium nucleatum ATcc 23726 adhesins involved in strain-specific attachment to Porphyromonas gingivalis

引用

International Journal of Oral Science 2016年第3期8卷 138-144页

作者： jane Park Bhumika Shokeen Susan K Haake Renate Lux School of Dentistry University of California at Los Angeles Los Angeles USA

Bacterial adherence is an essential virulence factor in pathogenesis and infection. Fusobacterium nucleatum has a central role in oral biofilm architecture by acting as a bridge between early Gram-positive and late Gram-negative colonizers that do not otherwise adhere to each other. In this study, we survey a key adherence interaction of F. nucleatum with Porphyromonas gingivalis, and present evidence that multiple fusobacterial adhesins have a role in the attachment of F. nucleatum ATcc 23726 to P. gingivalis in a highly strain-dependent manner. Interaction between these species displayed varying sensitivities to arginine, galactose and lactose. Arginine was found to hamper coaggregation by at least 62% and up to 89% with several P. gingivalis strains and galactose inhibition ranged from no inhibition up to 58% with the same P. gingivalis strains. Lactose consistently inhibited F. nucleatum interaction with these P. gingivalis strains ranging from 40% to 56% decrease in coaggregation. Among the adhesins involved are the previously described Fap2 and surprisingly, RadD, which was described in an earlier study for its function in attachment of F. nucleatum to Gram-positive species. We also provide evidence for the presence of at least one additional adhesin that is sensitive to arginine but unlike Fap2 and RadD, is not a member of the autotransporter family type of fusobacterial large outer membrane proteins. The strain-specific binding profile of multiple fusobacterial adhesins to P. gingivalis highlights the heterogeneity and complexity of interspecies interactions in the oral cavity.

关键词： adhesin bio?lm coaggregation Fusobacterium nucleatum Porphyromonas gingivalis

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

Soil-transmitted helminth egg contamination from soil of indigenous communities in selected barangays in Tigaon, camarines Sur, Philippines

引用

Asian Pacific Journal of Tropical Medicine 2020年第9期13卷 409-414页

作者： James Owen c.Delaluna Mary jane c.Flores Vicente Y.Belizario Jr. Jose Isagani B.Janairo Derick Erl P.Sumalapao Biology Department College of ScienceDe La Salle UniversityManila Philippines Biological control Research Unit Center for Natural Sciences and Environmental ResearchDe La Salle UniversityManila Philippines Department of Parasitology College of Public HealthUniversity of the PhilippinesManila Philippines Department of Epidemiology and Biostatistics College of Public HealthUniversity of the PhilippinesManila Philippines

Objective:To provide baseline data on the prevalence and intensity of soil-transmitted helminthiasis egg contamination in the soil among indigenous ***:A total of 317 soil samples from three barangays of indigenous communities communities in Tigaon,camarines Sur,Philippines were examined for soil-transmitted helminthiasis egg contamination using optimized sugar flotation ***:Of the soil samples examined,141(44.48%)were contaminated by Ascaris spp.,Toxocara spp.,and Trichuris *** cumulative prevalence varying across the study sites(Pcaris *** predominant in all study sites,followed by Toxocara *** Trichuris *** a prevalence of 41.96%,7.57%,and 5.36%,***,Toxocara *** the highest intensity of contamination,followed by Ascaris *** Trichuris *** term of geometric mean soil-transmitted helminthiasis eggs recovered per one gram soil sample(34.25,21.45,and 11.85 respectively).Each study site harbors significant amount of soiltransmitted helminthiasis eggs and zoonotic Toxocara eggs,which present high risk of soil-transmitted helminthiasis infection,particularly among children observed to play and cohabitate with animals known to be hosts of these ***:The alarming rate of soil-transmitted helminthiasis and Toxocara egg contamination reported in this study suggests that additional measures should be undertaken to control soil-transmitted helminthiasis and zoonotic intestinal infections in the country.

关键词： Indigenous peoples Soil-transmitted helminths Ascaris Toxocara Trichuris Public health

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

Anonymous TollPass: A Blockchain-Based Privacy-Preserving Electronic Toll Payment Model

引用

computers, Materials & continua 2024年第6期79卷 3495-3518页

作者： jane Kim Soojin Lee chan Yeob Yeun Seung-Hyun Seo Department of Electronic&Electrical Engineering Graduate SchoolHanyang UniversitySeoul04763Korea Department of Electrical Engineering and computer Science Khalifa University of Science and TechnologyAbu Dhabi127788United Arab Emirates School of Electrical Engineering Hanyang UniversityERICAAnsan15588Korea

As big data,Artificial Intelligence,and Vehicle-to-Everything(V2X)communication have advanced,Intelligent Transportation Systems(ITS)are being developed to enable efficient and safe transportation *** Toll collection(ETc),which is one of the services included in ITS systems,is an automated system that allows vehicles to pass through toll plazas without stopping for manual *** ETc system is widely deployed on highways due to its contribution to stabilizing the overall traffic system *** ensure secure and efficient toll payments,designing a distributed model for sharing toll payment information among untrusted toll service providers is ***,the current ETc system operates under a centralized ***,both toll service providers and toll plazas know the toll usage history of *** raises concerns about revealing the entire driving routes and patterns of *** address these issues,blockchain technology,suitable for secure data management and data sharing in distributed systems,is being applied to the ETc *** enables efficient and transparent management of ETc ***,the public nature of blockchain poses a challenge where users’usage records are exposed to all *** tackle this,we propose a blockchain-based toll ticket model named AnonymousTollPass that considers the privacy of *** proposed model utilizes traceable ring signatures to provide unlinkability between tickets used by a vehicle and prevent the identity of the vehicle using the ticket from being identified among the ring members for the ***,malicious vehicles’identities can be traced when they attempt to reuse *** conducting simulations,we show the effectiveness of the proposed model and demonstrate that gas fees required for executing the proposed smart contracts are only 10%(when the ring size is 50)of the fees required in previous studies.

关键词： Blockchain electronic toll collection smart contract traceable ring signature

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

classifying Abdominal Fat Distribution Patterns byUsing Body Measurement Data

引用

computer Modeling in Engineering & Sciences 2021年第3期126卷 1189-1202页

作者： Jingjing Sun Bugao Xu jane Lee Jeanne H.Freeland-Graves Department of Biomedical Engineering University of TexasAustinTX 78712USA Department of computer Science and Engineering University of North TexasDentonTX 76201USA Department of Nutritional Sciences University of TexasAustinTX 78712USA

This study aims to explore new categorization that characterizes the distribution clusters of visceral and subcutaneous adipose tissues(VAT and SAT)measured by magnetic resonance imaging(MRI),to analyze the relationship between the VAT-SAT distribution patterns and the novel body shape descriptors(BSDs),and to develop a classifier to predict the fat distribution clusters using the *** the study,66 male and 54 female participants were scanned by MRI and a stereovision body imaging(SBI)to measure participants’abdominal VAT and SAT volumes and the BSDs.A fuzzy c-means algorithm was used to form the inherent grouping clusters of abdominal fat distributions.A support-vector-machine(SVM)classifier,with an embedded feature selection scheme,was employed to determine an optimal subset of the BSDs for predicting internal fat distributions.A fivefold cross-validation procedure was used to prevent over-fitting in the *** classification results of the BSDs were compared with those of the traditional anthropometric measurements and the Dual Energy X-Ray Absorptiometry(DXA)*** clusters were identified for abdominal fat distributions:(1)low VAT and SAT,(2)elevated VAT and SAT,(3)higher SAT,and(4)higher *** cross-validation accuracies of the traditional anthropometric,DXA and BSD measurements were 85.0%,87.5% and 90%,*** to the traditional anthropometric and DXA measurements,the BSDs appeared to be effective and efficient in predicting abdominal fat distributions.

关键词： Abdominal fat distribution body shape descriptor SVM classifier

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

An Automatic Approach to Extending the consumer Health Vocabulary

引用

Journal of Data and Information Science 2021年第1期6卷 35-49页

作者： Michal Monselise jane Greenberg Ou Stella Liang Sonia Pascua Heejun Kim Mat Kelly Joan PBoone christopher c.Yang Drexel University PhiladelphiaPAUSA

Purpose: Given the ubiquitous presence of the internet in our lives, many individuals turn to the web for medical information. A challenge here is that many laypersons(as "consumers") do not use professional terms found in the medical nomenclature when describing their conditions and searching the internet. The consumer Health Vocabulary(cHV) ontology, initially developed in 2007, aimed to bridge this gap, although updates have been limited over the last decade. The purpose of this research is to implement a means of automatically creating a hierarchical consumer health vocabulary. This overall purpose is improving consumers' ability to search for medical conditions and symptoms with an enhanced cHV and improving the search capabilities of our searching and indexing tool HIVE(Helping Interdisciplinary Vocabulary Engineering).Design/methodology/approach: The research design uses ontological fusion, an approach for automatically extracting and integrating the Medical Subject Headings(Me SH) ontology into cHV, and further convert cHV from a flat mapping to a hierarchical ontology. The additional relationships and parent terms from Me SH allow us to uncover relationships between existing terms in the cHV ontology as well. The research design also included improving the search capabilities of HIVE identifying alternate relationships and consolidating them to a single ***: The key findings are an improved cHV with a hierarchical structure that enables consumers to search through the ontology and uncover more *** limitations: There are some cases where the improved search results in HIVE return terms that are related but not completely synonymous. We present an example and discuss the implications of this result. Practical implications: This research makes available an updated and richer cHV ontology using the HIVE tool. consumers may use this tool to search consumer terminology for medical conditions and symptoms. The HIVE tool will return re

关键词： consumer Health Vocabulary Ontological fusion Medical ontologies

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

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：