检索结果-南通市图书馆

Incidence and histopathology of encysted progenetic metacercaria of Clinostomum complanatum(Digenea:Clinostomidae) in Channa punctatus and its development in experimental host

引用

Asian pacific Journal of Tropical Biomedicine 2012年第6期2卷 421-426页

作者： pa Ahammed Shareef SMA Abidi Section of parasitology Department of Zoology Aligarh Muslim University

Objective:To study the incidence of encysted progenetic metacercariae of Clinostomum complanatum(C. complanatum) in Channa punctatus(C. punctatus), associated histopathology and the experimental infection to laboratory chicken to obtain ovigerous adult ***:Live C. punctatus were brought from local fish market of Aligarh, India, dissected and examined on a monthly basis for the presence of C. complanatumcysts. For histochemistry, infected tissue sections with attached cysts were processed for haematoxylene and eosin staining. Cysts were aseptically fed to 4 day old leghorn chicken to obtain adult worms. Mechanically excysted metacercaria and the ovigerous adult worms were stained in carmine to prepare permanent ***:One year survey for the infection of encysted progenetic metacercaria of ***. punctatusrevealed the prevalence, intensity and abundance of 24.7%, 2.27and 0.608, respectively. Histopathology showed heavy infiltration of immune cells at the site of cyst attachment and some tissue damage was also evident. Following feeding to experimental chicken, about 41.07% of the encysted metacercariae were able to excyst and migrate back to bucco-pharyngeal region where they tenaciously attached and fed on blood, and transformed into ovigerous adult worms from 62 hours onwards of post ***:The parasite is potentially pathogenic to the host, and the availability of a suitable intermediate host can be a contributing factor for the occurrence of C. complanatummetacercaria either in the excysted or encysted form, indicating loose host specificity and zoonotic potential.

关键词： Clinostomum complanatum Encysted progenetic metacercaria Channa punctatus Histopathology Experimental infection Ovigerous adult worm Incidence Host-parasite interaction Metacercarial transformation

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

Carcinoembryonic antigen inhibits neutrophil activation by N-formyl-methionyl-leucyl-phenylalanine

引用

BIOCELL 2015年第2期39卷 1-3页

作者： Anna paŃCZYSZYN Anna KROP-WATOREK Maciej WIECZOREK University of Opole Department of Biotechnology and Molecular BiologyOpolePoland Ludwik Hirszfeld Institute of Immunology and Experimental Therapy Polish Academy of SciencesWroclawPoland

Carcinoembryonic antigen(CEA)is a surface glycoprotein expressed in human epithelial cells and is released from their surface,especially during colorectal ***,colorectal cancer is accompanied by inflammation,where tumor-infiltrating neutrophils play an important *** was also found to be a strong chemotactic agent for *** purpose of this study was to find out if CEA can enhance neutrophil priming and *** neutrophils were activated by N-formyl-methionyl-leucyl-phenylalanine(formyl-MLP)and the resulting oxidative burst was measured ***,in vitro priming of neutrophils by CEA,alone or preceded by LPS,inhibited subsequent activation of these cells by *** may have anti-inflammatory properties in vivo.

关键词： CEA oxidative burst formyl-MLP

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

A Thai family with hereditary pancreatitis and increased cancer risk due to a mutation in PRSS1 gene

引用

World Journal of Gastroenterology 2005年第11期11卷 1634-1638页

作者： Theeraphong Pho-Iam Wanna Thongnoppakhun pa-Thai Yenchitsomanus Chanin Limwongse Division of Molecular Genetics Division of Medical Genetics

AIM: To investigate mutation of serine protease 1-cationic trypsinogen (CT, PRSS1) gene in members of a Thai family with hereditary pancreatitis and pancreatic cancer. METHODS: Polymerase chain reaction and direct sequencing were performed to analyze the PRSS1 gene in two members of the family affected by pancreatitis. Allele specific amplification (ASA) method was then developed to detect the mutation of the PRSS1 gene in all available members of the family and normal control subjects. RESULTS: A cytosine (C) to thymine (T) mutation at position 2441 (g.2441C>T) of the PRSS1 gene, which results in a substitution of arginine by cysteine at position 116 (R116C) of CT, was identified by direct sequencing in both clinically affected members of the family but was not found in the unaffected member. This mutation, which might be arising from deamination of methylated cytosine in CpG dinucleotide of codon 116 (CGT>TGT), was also detected by the ASA method in the two affected members and a proband's brother but was not observed in unaffected members and 54 normal control subjects. CONCLUSION: Autosomal dominant pancreatitis with increased cancer risk in the studied Thai family is most likely due to missense (R116C) mutation in the PRSS1 gene.

关键词： PRSS1 Hereditary pancreatitis pancreatic cancer Thai R116C

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

Ultra-low temperature cofired ceramics based on Li_(2)WO_(4)as perspective substrate materials for terahertz frequencies

引用

Journal of Advanced Ceramics 2023年第3期12卷 526-538页

作者： Dorota Szwagierczak Beata Synkiewicz-Musialska Jan Kulawik Elżbieta Czerwińska Norbert pałka Kraków Division Łukasiewicz Research Network-Institute of Microelectronics and PhotonicsKraków 30-701Poland Institute of Optoelectronics Military University of TechnologyWarszawa 00-908Poland

With the development of low dielectric permittivity materials having an ultra-low sintering temperature,testing their dielectric properties at terahertz frequencies suitable for 6G communication systems and implementation of the fabricated materials in ultra-low temperature cofired ceramics(ULTCC)were the main goals of the *** tungstate Li_(2)WO_(4)was synthesized by a solid-state reaction and used for the preparation of green tapes and test structures with cofired internal conductive layers,which are destined for substrates of microwave and submillimeter wave *** behavior,thermal effects,and mass changes of the green tapes during heating were studied using a hot-stage microscope,differential thermal analysis,and thermogravimetry.A single-phase composition was revealed for being undoped and doped with AlF3–CaB_(4)O_(7)*** impact of frequency,temperature,the addition of AlF3–CaB_(4)O_(7)and CuBi_(2)O_(4)dopants,and sintering temperature was the subject of in-depth characterization of dielectric properties in a terahertz region.A glass-free composition,ultra-low sintering temperature of 590–630℃,low roughness of the green tapes,dense microstructure,compatibility with Ag conductors,low and stable dielectric permittivity of 5.0–5.8 in a broad range of 0.2–2 THz,and low dielectric loss of 0.008–0.01 at 1 THz are the main advantages of the developed ULTCC substrates.

关键词： Li_(2)WO_(4) ultra-low temperature cofired ceramics(ULTCC) tape casting dielectric properties terahertz frequency range

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

Myxomycete colonization on translocated and non-translocated dead leaves from temperate and tropical forests

引用

Studies in Fungi 2020年第1期5卷 462-470页

作者： Rojas C Stephenson SL Rojas pa Finca Experimental Interdisciplinaria de Modelos Agroecológicos University of Costa RicaTurrialba30502-Costa Rica Engineering Research Institute University of Costa RicaSan Pedro de Montes de Oca11501-Costa Rica Department of Biological Sciences University of ArkansasFayettevilleAR 72701USA

Samples of dead leaves on the forest floor were collected from a locality in central Costa Rica and another locality in northwest Arkansas in the United States and then were placed in fine-mesh nylon bags,autoclave. and left out in the field for four *** of the bags prepared with sterile material from each country were placed out in the country where they were collected,and the other half were placed in the other country.A characterization of forest structure and ground leaf chemistry was carried out for both localities and both leaf *** recollected,all samples were processed for myxomycetes with the use of the moist chamber culture *** cultures yielded a total of 156 records of myxomycetes representing 16 species,but only 13 records and six species were isolated from the samples left out in Costa *** hundred percent of cultures placed out in Arkansas produced myxomycetes,whereas only 68%of those placed out in Costa Rica were positive for these *** in species richness and number of records were observed across forests where the samples were placed out,and no differences were observed based on the origin of the *** suggested that myxomycete colonization in the studied areas is primarily affected by the dynamics of the forest type and secondarily by substrate *** myxomycete species recorded on leaves with poorer chemical values are also consistent with field *** the present study,the more open character of the temperate forest in Arkansas without a film of water layer covering the leaves on the ground seemed to have played a role in the establishment of myxomycete propagules in the sterile material during the time of the investigation.

关键词： Arkansas Costa Rica myxogastrids Pea Ridge slime molds Turrialba

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

Generating oligodendroglia from adult mesenchymal cells for transplantation:cell reprogramming or direct lineage conversion?

引用

Neural Regeneration Research 2023年第7期18卷 1493-1494页

作者： Jorge pascual-Guerra JoséA.Rodríguez-Navarro Carlos L.paíno Service of Neurobiology-Research Ramón y Cajal University Hospital-IRYCISMadridSpain Department of Cellular Biology Complutense UniversityMadridSpain

Cell replacement therapy has long been proposed as a treatment for the damaged nervous *** of the most challenging aspects of such a strategy,however,is finding sources of donor cells for *** neural cells are rarely an option as every cell in the nervous system has a defined function that would be lost if that cell was to be *** possibility would be sourcing precursor or differentiated cells from fetal tissues;however,aside from ethical issues,heterologous cells are at risk of immunological rejection in the long *** improvements over the past 15 years have led to the possibility that autologous non-neural cells could be used for cell transplantation through their conversion into neural derivatives.

关键词： neural programming removed

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

High-Sensitivity Magnetization Measurements

引用

Journal of Materials Science & Technology 2000年第2期16卷 97-101页

作者： C.D. Graham (Dept. of Materials Science, University of Pennsylvania, Philadelphia, pa 19104, USA) Dept. of Materials Science University of Pennsylvania Philadelphia PA 19104 United States

The three most common instruments for high-sensitivity magnetization measurements (the vibrating-sampie magnetometer, the alternating gradient magnetometer, and the SQUID magnetometer) are described and their limiting sensitivities are discussed. The advantages and disadvantages of each are described. Magnetometers using micro-machined force detectors are briefly mentioned.

关键词： VSM High-Sensitivity Magnetization Measurements

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

Correlates of resistance to gastrointestinal nematode infection in Nigerian West African dwarf sheep

引用

Asian pacific Journal of Tropical Medicine 2012年第7期5卷 529-532页

作者： IK Idika SN Chiejina LI Mhomga pa Nnadi LA Ngongeh Department of Veterinary parasitology and Entomology University of NigeriaNsukkaNigeria Department of Veterinary parasitology and Microbiology Michael Okpara University of AgricultureUmudikeNigeria Department of Animal Health and Production University of AgricultureMakurdiNigeria Department of Animal Health and Production University of NigeriaNsukkaNigeria

Objective:To investigate correlates of resistance to G1 nematode infection in Nigerian West African dwarf(WAD) ***:Thirty three sheep were randomly assigned to two groups, A(n=27) which were used for experimental infections,and B(n=6) which served as uninfected *** infected animal received weekly escalating infections with infective larvae(60% Haemonchus contortus(***) and 40%Trichostrongylus colubriformis(***) for 4 *** responses of all the infected and control sheep were assessed by faecal egg count(FEC),worm burden(Wb),packed cell volume(PCV),body weight(Bwt).and body condition score(BCS).On the basis of their individual faecal egg output,Lambs in group A with epg≤1 000 on any sampling day were classified as low faecal egg count(LFEC) phenotype(n = 16),those with epg between 1 000 and 10 000 as intermediate(n=5) and lambs with epg > 10 000 as high feacal egg count(HFEC) phenotype(n=6).Results:The difference between the FEC classes was highly significant(P=0.001).The BCS and weight gained at the end of the experiment by the control and LFEC sheep was significandy higher(P≤0.05) than those of the intermediate and HFEC *** was a significant and negative correlation between the parasitological measures and the trio of BCS,PCV and Bwt of ***:The result of the study indicated that the FEC,weight gain,PCV,and BCS are correlates and potential selection crileria of G1 nematode resistant WAD sheep.

关键词： WAD sheep Phenotypic markers Resistance Resilience GI nematode

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

Antimicrobial and antispasmodic activity of leaf extract and fractions of Stachytarpheta cayennensis

引用

Asian pacific Journal of Tropical Medicine 2010年第3期3卷 189-192页

作者： Okoye TC Akah pa Okoli CO Ezike AC Mbaoji FN Department of Pharmacology & Toxicology Faculty of Pharmaceutical SciencesUniversity of Nigeria

Objective:To investigate the antimicrobial activity of the methanol leaf extract(ME),n-hexane fraction(HF),ethylacetate fraction(EF) and methanol fraction(MF),of Stachytarpheta cayennensis ***(verbenaceae) as well as to ascertain the antispasmodic effects of the ME and the various fractions(HF,EF and MF) on acetylcholine(Ach) and histamine(H) induced contractions on isolated guinea pig ***:The in vitro agar well diffusion method was used for the antimicrobial studies while the isolated tissue method was employed for the antispasmodic test. Organisms used were all clinical isolates of Bacillus subtilis,Staphylococcus aureus,Pseudomonas aeruginosa,Salmonella paratyphi,Candida albicans and Aspergillus ***:The extract and fractions exhibited dose dependent inhibition against all the bacteria tested and also exhibited insignificant antifungal activity against Candida albicans and Aspergillus *** minimum inhibitory concentration(MIC) of the extract and fractions(mg/mL) on Bacillus subtilis, Staphylococcus aureus,Pseudomonas aeruginosa and Salmonella paratyphi respectively were ME 5.62,14.12,22.38,2.11;EF 1.25,6.30,9.40,9.40 and MF 3.98,8.81,39.80,*** n-hexane fraction exhibited MIC of 1.07 mg/mL against only Bacillus *** extract and fractions exhibited significant(Ppasmodic effects confirming the claimed use in folkloric medicine

关键词： Antimicrobial Antispasmodic Stachytarpheta cayennensis Acetylcholine Histamine

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 DIMBOA on impulse discharges of maxillary lateral sensillum styloconicum of armyworm larvae

引用

Chinese Science Bulletin 1997年第1期42卷 72-76页

作者： Yang, DM Luo, L Yan, FM Cheng, HW Zhou, pa BEIJING UNIV COLL LIFE SCIBEIJING 100871PEOPLES R CHINA

THE DIMBOA (2, 4-dihydroxy-7-methoxy-1, 4-benzoxazin-3-one), a secondary product present in corn plants, plays an important role in protecting the plant against the pest attack. DIMBOA is rich in seedlings of cereal crops, especially in maize. Many investigators demonstrated a linear relationship between the DIMBOA content in plant and the resistance of the plant to pest. Feng et al. (1992) summarized that the toxicity of DIMBOA is associated

关键词： armyworm larvae gustatory chemoreceptor lateral sensillum styloconicum DIMBOA.

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：