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SYNTHESIS　AND　CATALYTIC　PROPERTIES　OF　LAYERED　DOUBLE　HYDROXIDES　PILLARED　BY　HETEROPOLYOXOMETALATE

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Chinese Chemical Letters 1995年第8期6卷 719-722页

作者： Xu, Z He, HM Zhou, DM Wen, ls Jiang, D Wu, Y Jilin Univ Dept Chem Changchun 130023 Peoples R China Chinese Acad Sci Changchun Inst Appl Chem Changchun 130021 Peoples R China

Layered double hydroxides(LDHs)pillared with heteropolyoxometalate have been synthesized via both restructuring of hydrotalcite-like compounds and direct anion exchange under microwave *** and their derivatives are both found to be efficient for alkylation of isobutane with butene with a higher butene conversion and selectivity towards Cso

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Modeling joints with clearance and friction in multibody dynamic simulation of automotive differentials

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Theoretical & Applied Mechanics Letters 2013年第1期3卷 32-38页

作者： Geoffrey Virlez Olivier Brüls Emmanuel Tromme Pierre Duysinx Department of Aerospace and Mechanical Engineering (LTAS) University of Liège

Defects in kinematic joints can sometimes highly influence the simulation response of the whole multibody system within which these joints are included. For instance, the clearance, the friction, the lubrication and the flexibility affect the transient behaviour, reduce the component life and produce noise and vibration for classical joints such as prismatics, cylindrics or universal *** this work, a new 3D cylindrical joint model which accounts for the clearance, the misalignment and the friction is presented. This formulation has been used to represent the link between the planet gears and the planet carrier in an automotive differential model. C 2013 The Chinese Society of Theoretical and Applied Mechanics. [doi：10.1063/2.1301303]

关键词： cylindrical joint clearance friction automotive differential, multibody dynamics

Multiple insecticide resistance/susceptibility status of Culex quinquefasciatus,principal vector of bancroftian filariasis from filaria endemic areas of northern India

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Asian Pacific Journal of Tropical Medicine 2011年第6期4卷 426-429页

作者： Kaushal Kumar Abhay K Sharma Sarita Kumar Sunita Patel Manas Sarkar Chauhan ls Centre for Medical Entomology and Vector Management National Centre for Diseases Control22-Shamnath MargDelhi-110054India Regional Filariasis Training and Research Centre National Centre for Diseases ControlVaranasi-221010India

Objective:To understand the insecticide resistance status of Culex quinquefasciatus Say（Diptera: Culicidae）（***） to deltamethrin,cyfluthrin,permethrin,lambdacyhalothrin, DDT and malathion in filarial endemic areas of Uttar Pradesh,***:Insecticide susceptibility assays were performed on wild-caught adult female *** mosquitoes to deltamethrin（0.05%）,cyfluthrin（0.15%）,permethrin（0.75%）,lambdacyhalothrin （0.05%）,malathion（5.0%） and DDT（4.0%）,the discriminating doses recommended by the World Health Organisation（WHO）.Results:The data showed that *** is highly resistant to DDT and malathion;the mortality was 28.33%and 27.5%,respectively and incipient resistance to synthetic pyrethroids（deltamethrin,cyfluthrin,permethrin,and lambdacyhalothrin）, where mortality ranged from 95.83%in permethrin to 98.33%in cyfluthrin and lambdacyhalothrin. Knockdown times(KDT50) in response to synthetic pyrethroids varied significantly between different insecticides（P<0.01） from 31.480 min for permethrin to 21.650 for cyfluthrin. Conclusions:The results presents here provide the status report of the insecticide resistance/ susceptibility of *** in major filaria endemic areas of northern India.

关键词： Insecticide resistance Filaria DDT Synthetic pyrethroid Malathion Culex quinquefasciatus

Synchrotron radiation investigations of the Sr_2MgSi_2O_7:Eu^(2+),R^(3+) persistent luminescence materials

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Journal of Rare Earths 2009年第4期27卷 529-538页

作者： Tuomas Aitasalo Jukka Hassinen Jorma Hls Taneli Laamanen Mika Lastusaari Marja Malkamki Janne Niittykoski Pavel Novák Department of Chemistry University of Turku FI-20014 Turku Finland Turku University Centre for Materials and Surfaces (MatSurf) Turku Finland Graduate School of Materials Research (GSMR) Turku Finland Institute of Physics Academy of Sciences of the Czech Republic CZ-16253 Prague 6 Czech Republic

The electronic and defect energy level structure of polyerystalline Sr2MgSi2OT：Eu^2＋,R^3＋ persistent luminescence materials were studied with thermoluminescence and different synchrotron radiation spectroscopies （UV-VUV emission and excitation, X-ray absorption near-edge spectroscopy （XANES） and extended X-ray absorption f＇me structure （EXAFS））. Special attention was paid on the effect of the R3＋ co-dopants on the persistent luminescence properties of the materials. Theoretical calculations using the density functional theory （DFT） were carried out simultaneously with the experimental work. The experimental band gap energy （Eg） value of ca. 7.1 eV agreed very well with the DFT value of 6.7 eV. The variation of the Eg value was attempted to relate with the trap structure as well as with the different properties of the R3＋ co-dopants. The trap level energy distribution depended strongly on the R3＋ co-dopant except for the shallowest trap energy above the room temperature remaining practically the same, however. The different processes in the mechanism of persistent luminescence from Sr2MgSi2OT：Eu^2＋,R^3＋ were assembled and their contributions discussed.

关键词： strontium magnesium disilicate europium persistent luminescence synchrotron radiation thermoluminescence mechanism rare earths

An unusual cause of cholecystitis:Heterotopic pancreatic tissue in the gallbladder

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World Journal of Gastroenterology 2007年第2期13卷 313-315页

作者： Glsm zlem Elpek Sevgi Bozova Gkben Y■d■r■m Kpesiz Mehmet ■■ Akdeniz University Medical School Department of Pathology Yeni T■p Dekanl■k 07070 Antalya Turkey Akdeniz University Medical School Department of General Surgery Yeni T■p Dekanl■k 07070 Antalya Turkey

Gallbladder localization of heterotopic pancreas （HP） is uncommon and very rarely gives rise to symptoms. Herein we report a case of HP found in the gallbladder neck presented with signs and symptoms of cholecystitis. The patient was a 40-year old male, suffering from epigastric pain, abdominal fullness and fever. On physical examination, the right upper abdomen was tender with a positive Murphy＇s sign. Ultrasonographic examination showed a hydropic gallbladder without stones and he underwent a cholecystectomy. Pathological examination revealed an intramural nodule （9 ram） in the neck region which is consisted of acini, ducts and islet cells of an aberrant pancreatic tissue. Although HP is encountered rarely in the gallbladder and is found incidentally during pathological studies, this case emphasizes that HP might cause symptoms and present clinically as cholecystitis. For this reason, in patients presenting with symptomatic gallbladder diseases, including cholecystitis without any other pathology, HP should be taken into consideration before it is diagnosed as ＂idiopathic＇：

关键词： Heterotopic tissues Pancreas Acalculous cholecystitis Gallbladder

Application of mobile photography with smartphone cameras for monitoring of orthodontic correction with dental BRACKETS

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中国现代医学杂志 2014年第15期24卷 10-14页

作者： Godlevsky ls Bidnyuk EA Bayazitov NR Kresyun NV Kovalenko AS Lyashenko AV Balykov VV

This research was to observe patients,who underwent orthodontic tooth alignment correction with dental brackets,for the purpose of early detection of white spots(early satge of caries)and dynamic measurement of distance between teeth edges based on the digital photographs taken with a smartphone Sony Xperia *** reading was realized taking into account the adjustment of color features of a standard ceramic surface(tile)that was selected during the dental brackets installation period,the photo of which was taken simultaneously during the dynamic observation *** color scale RGB was transformed into CIE L*a*b scale of color measurement with regard to the correction of RGB components of image by usage of correction coefficient for calibration tile surface RGB *** expert appraisal showed sensitivity of proposed method was between 88.7%and 96.2%(the mean 93.1%)and specificity between 68.4%and 84.2%(the mean 75.4%).The positive predictive value was between 89.5%and94.0%(the mean 91.5%);and the negative predictive value was between 72.7%and 86.7%(the mean 80.6%).The measurement of the distance between teeth edges during the first 10 days following the brackets installation was carried out using a self-scalable ruler that was calibrated,according to the standard sizes of the dental bracket system *** Android application of self-scalable ruler was developed using *** development of a pronounced pain syndrome was observed when the velocity of distance changes between teeth edges was rather high-0.051+0.004 mm/*** improvement of efficiency of the suggested method is expected due to application of illumination standards during the shooting period.

关键词：牙科口腔卫生牙齿治疗方法

Effect of Gd addition on the superconducting properties of Ti-based V, Nb, Ta alloys

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Superconductivity 2023年第2期6卷 58-63页

作者： SK Ramjan ls.Sharath Chandra Rashmi Singh M.K.Chattopadhyay Free Electron Laser Utilization Laboratory Raja Ramanna Centre for Advanced TechnologyIndore 452013Madhya PradeshIndia Homi Bhabha National Institute Training School ComplexAnushakti NagarMumbai 400094MaharastraIndia Laser and Functional Materials Division Raja Ramanna Centre for Advanced TechnologyIndore 452013Madhya PradeshIndia

The critical current density(Jc)of the body centered cubic(bcc)V0.6Ti0.4 alloy enhances significantly after the addition of rare earth Gd as the latter is immiscible in the matrix[***,***,IEEE ***.31,5(2021)].Very low solubility of Gd in other bcc elements like Ta and Nb is also well known[*** Gschneidner in Prog Sci Technol Rare Earths,vol.1,pp.222–258,1964&M Neuberger,*** in Handbook of Electronic Materials,Vol 4,1972].We use these facts to find the effect of adding 1 at.%Gd into the Nb0.6Ti0.4 and Ta0.4Ti0.6 alloys on the superconducting properties e.g.,the transition temperature(Tc),Jc,flux pinning force density(Fp)and the *** spite of Gd being ferromagnetic,the Tc in these alloys change only marginally(increase by 0.3 K in Ta0.4Ti0.6 and decrease by 0.15 K in Nb0.6Ti0.4 after Gd *** Jc(H?1 T,T=4 K)increases by 5 and 1.5 times respectively in the Gd containing Nb0.6Ti0.4 and Ta0.4Ti0.6 alloys,which is quite small as compared to the increase observed in the V0.6Ti0.4(20 times)*** Gd addition,the grain size reduces approximately by 65%and 10%respectively in Nb0.6Ti0.4 and *** analysis indicates that grain boundaries are the major flux line pinning centres in these alloys and the role of Gd in increasing the Jc depends on the effectiveness of Gd in reducing the grain *** grain boundary density depends strongly on the distribution of Gd precipitates,which is quite different from each other for two alloy systems under ***,our results suggest that the addition of Gd to commercial Nb‐Ti(Nb0.37Ti0.63)alloy is a new promising route for achieving higher Jc values.

关键词： Critical current density Ferromagnetism Flux pinning Grain boundary

Discrepancies between the responses to skin prick test to food and respiratory antigens in two subtypes of patients with irritable bowel syndrome

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World Journal of Gastroenterology 2008年第19期14卷 3044-3048页

作者： Rosa ls Soares Hamilton N Figueiredo Jose M Santos Rita F Oliveira Raquel L Godoy Felipe AP Mendona Internal Medicine Department Faculty of Medicine-Federal Fluminense University Internal Medicine Department Faculty of MedicineFederal Fluminense University Medical school of Universitary Hospital Antonio Pedro Federal Fluminense University Medical school of Faculty of Medicine Federal Fluminense University

AIM:To compare the response to skin prick tests (SPTs) to food antigens (FAs) and inhalant allergens (IAs) in patients with two subtypes of irritable bowel syndrome (IBS) and healthy controls. METHODS:We compared the results of SPTs for IAs and FAs in 87 volunteers divided into three groups:diarrhea predominant IBS (D-IBS) GroupⅠ(n = 19), constipation predominant IBS (C-IBS) Group Ⅱ (n = 17), and normal controls Group Ⅲ (n = 51). RESULTS:Of the 285 tests (171 for FAs and 114 for IAs) performed in GroupⅠwe obtained 45 (26.3%) positive responses for FA and 23 (20.1%) for IA. Of the 153 tests for FA in Group Ⅱ, we obtained 66 (20.1%) positive responses, and of the 102 tests for IA, we obtained 20 (19.6%) positive responses. Of the 459 tests for FA performed in Group Ⅲ, we obtained 39 (84%) positive responses, and of the 306 for IA, we obtained 52 (16.9%) positive responses. The numbers of positive responses were not significantly different between the three groups, but in the D-IBS group, the number of SPTFA responses differed significantly from those for the other two groups (P < 0.01). CONCLUSION:Despite the small number of cases studied, the higher reactivity to FAs in GroupⅠcompared to Groups Ⅱ and Ⅲ adds new information, and suggests the presence of a possible alteration in intestinal epithelial function.

关键词： Atopy Constipation Diarrhea Foodintolerance Irritable bowel syndrome Skin prick test

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莺—琼盆地含气区储层特征

天然气工业 1999年第1期19卷 20-24页

作者：吕明中国海洋石油南海西部公司勘探开发科学研究院

介绍了莺—琼盆地几种主要储层类型的特征及分布，包括：近源、远源、低位三角洲，浊积扇，浊积水道，海滩，水下高地浅滩，风暴席状砂和潮流砂脊等。通过对相对海平面变化及层序分析，确定了本区的旋回系统，认为本区第三纪经历了３次... 详细信息

介绍了莺—琼盆地几种主要储层类型的特征及分布，包括：近源、远源、低位三角洲，浊积扇，浊积水道，海滩，水下高地浅滩，风暴席状砂和潮流砂脊等。通过对相对海平面变化及层序分析，确定了本区的旋回系统，认为本区第三纪经历了３次较大的海平面下降过程，盆地的沉积、沉降中心也有过几次较大的迁移，为在盆地中发育储层及储盖组合创造了有利的条件，分别对应于Ｓ４０、Ｓ６０和Ｓ７０层序界面，这些层位应是储层比较发育的层段。还分析了压实、胶结、溶蚀等成岩作用对储层物性的影响。结果认为：盆地及盆地周缘的构造运动和环境条件适合形成多种类型的储集体；沉积、成岩条件有利于储层孔隙的保存和发育；本区完全具备形成大气区的储层条件。

关键词：莺琼盆地储集层含气区类型