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Androgenic effect of Mondia whitei roots in male rats

Asian Journal of Andrology 2004年第3期6卷 269-272页

作者： Pierre Watcho Pierre Kamtchouing Selestin D.Sokeng Paul F.Moundipa Justine Tantchou jean l.essame Noussithe Koueta Animal Physiology and Phytopharmacology laboratory Faculty of ScienceUniversity of DschangDschangCameroon Animal Physiology laboratory University of Yaounde IYaoundeCameroon Department of Biochemistry Faculty of SciencesUniversity of Yaounde IYaoundeCameroon 不详 University Hospital Centre YaoundeCameroon

Aim: To determine the effect of the aqueous extract of Mondia whitei (Periplocaceae) roots on testosterone production and fertility of male rats. Methods: Adult male Wistar rats were used. In the acute study, 20 rats were randomly divided into 5 groups of 4 animals each. Four treated groups were administered orally a single dose of Mondia whitei (400 mg/kg) and the controls received a similar amount of distilled water. One group of animals were sacrificed by cervical dislocation 1,2,4 and 6 h after treatment, respectively. The controls were sacrificed at 6 h. Testicular testosterone was determined by radioimmunoassay. In the chronic study, 28 rats were divided at random into 4 groups of 7 animals each: Groups 1, 2 and 3 were given orally the plant extract (400 mg·kg-1·day-1) for 2, 4 and 8 days, respectively. The animals of Groups 1 and 2 were sacrificed 24 hours after the last dosing. The controls (Group 4) received the same amount of distilled water for 8 days. The fertility was assessed only in Groups 3 and 4 and after that, the animals were sacrificed and the epididymal sperm density, the serum testosterone and the testicular testosterone and 17β-estradiol were assayed. The serum, testicular and epidydimal protein contents were also determined. Results: In the acute treatment groups, the serum and testicular concentrations of testosterone remained unchanged at all the time points. Chronic treatment for 8 days induced a significant increase in the testicular weight, the serum and testicular testosterone, the testicular protein content and the sperm density (Pland weights, the serum protein contents, the testicular concentration of 17β-estradiol and the fertility compared to the controls. Conclusion: Mondia whitei root extract possesses an androgenic property.

关键词： Mondia whitei testosterone sperm density fertility

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旋量理论及其在材料力学中的应用

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力学与实践 2025年第6期46卷 1262-1270页

作者：黄行蓉李敏 lAINE jean-Pierre 北京航空航天大学中法工程师学院/国际通用工程学院北京 100191 北京航空航天大学航空科学与工程学院北京 100191

旋量理论是为力学量身定制的数学工具，在描绘刚体运动时表现出独特优势。基于材料力学中的平截面假设，构件的截面运动可分解为形心位移以及截面绕形心的旋转，从而可将截面运动视为刚体运动，故可采用旋量理论刻画构件截面的运动和受... 详细信息

旋量理论是为力学量身定制的数学工具，在描绘刚体运动时表现出独特优势。基于材料力学中的平截面假设，构件的截面运动可分解为形心位移以及截面绕形心的旋转，从而可将截面运动视为刚体运动，故可采用旋量理论刻画构件截面的运动和受力。该描述方式在数学形式上具有统一性，在物理现象上能对应实际受载和变形的一般性，可将力学问题转变成基于旋量运算法则求解的数学问题。本研究期望能为我国材料力学教学提供新视角和新思路。

关键词：旋量理论材料力学数学工具

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Dispersive Blow-Up Ⅱ.Schrdinger-Type Equations,Optical and Oceanic Rogue Waves

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Chinese Annals of Mathematics,Series B 2010年第6期31卷 793-818页

作者： Jerry l.BONA jean-Claude SAUT Department of Mathematics Statistics and Computer Science University of Illinois at Chicago laboratoire de Mathématiques UMR 8628 Université Paris-Sud et CNRS

Addressed here is the occurrence of point singularities which owe to the focusing of short or long waves, a phenomenon labeled dispersive blow-up. The context of this investigation is linear and nonlinear, strongly dispersive equations or systems of equations. The present essay deals with linear and nonlinear Schrdinger equations, a class of fractional order Schrdinger equations and the linearized water wave equations, with and without surface tension. Commentary about how the results may bear upon the formation of rogue waves in fluid and optical environments is also included.

关键词： Rogue waves Dispersive blow-up Nonlinear dispersive equations Nonlinear Schrdinger equation Water wave equations Propagation in optical cables Weak turbulence models

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large-scale industrial manufacturing of carbon nanotubes in a continuous inclined mobile-bed rotating reactor via the catalytic chemical vapor deposition process

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Frontiers of Chemical Science and Engineering 2017年第2期11卷 280-289页

作者： Sophie l. Pirard Sigrid Douven jean-Paul Pirard laboratory of Chemical Engineering Department of Chemical Engineering University of Liege B-4000 Liege Belgium

This article reports the different steps of the design, development and validation of a process for continuous production of carbon nanotubes （CNTs） via catalytic chemical vapor deposition from the laboratory scale to the industrial production. This process is based on a continuous inclined mobile-bed rotating reactor and very active catalysts using methane or ethylene as carbon source. The importance of modeling taking into account the hydrodynamic, physicochemical and physical phenomena that occur during CNT production in the process analysis is emphasized. The impact of this invention on the environment and human health is taken into consideration too.

关键词： carbon nanotubes catalytic chemical vapor deposition inclined rotating reactor industrial process scaling-up

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Advanced list scheduling heuristic for task scheduling with communication contention for parallel embedded systems

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Science China(Information Sciences) 2010年第11期53卷 2272-2286页

作者： NEZAN jean-Francois RAUlET Mickaёl COUSIN jean-Gabriel IETR/Image and Remote Sensing Group CNRS UMR 6164/INSA Rennes 35043 RENNES Cedex France

Modern embedded systems tend to use multiple cores or processors for processing parallel applications. This paper indeed aims at task scheduling with communication contention for parallel embedded systems and proposes three advanced techniques to improve the list scheduling heuristic. Five groups of node levels (two existing groups and three new groups) are firstly used as node priorities to generate node lists. Then the critical child technique improves the selection of a processor in the scheduling process. Finally, the communication delay technique enlarges the idle time intervals on communication links. We also propose an advanced dynamic list scheduling heuristic by combining the three techniques. Experimental results show that the combined advanced dynamic heuristic is efficient to shorten the schedule length for most of the randomly generated DAGs in the cases of medium and high communication. Our method accelerates an application up to 80% in the case of high communication and can also reduce the use of hardware resources.

关键词： list scheduling communication contention node level critical child communication delay

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Epidemiological and Histological Profile of Cervical Cancer in Cameroon: About 2078 Cases

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Open Journal of Obstetrics and Gynecology 2016年第4期6卷 232-239页

作者： Engbang Ndamba jean Paul Tchente Nguefack Charlotte Owona Manga léon Jules Simo Godefroy Essam Sime jean Daniel Elono Fouda Andrée Michelle essame Oyono jean louis Hasigov Alan Faculty of Medicine and Pharmaceutical Sciences The University of Douala Douala Cameroon laquintinie Hospital of Douala Douala Cameroon North-Ossetian State Medical Academy Vladikavkaz Russia Douala General Hospital Douala Cameroon Bio-Medical and Cancer Center of Bafoussam Bafoussam Cameroon Maroua Regional Hospital Maroua Cameroon Faculty of Medicine and Biomedical Sciences The University of Yaoundé I Yaoundé Cameroon Yaounde University Health Center Yaoundé Cameroon

Objective: To describe the epidemiological and histological aspects of cervical cancer in Cameroon. Materials and Methods: It was a descriptive retrospective study carried out over a period of 10 years (2005-2014), on malignant tumors of the cervix observed at the laboratory of Anatomic Pathology in four regions (Center, littoral, West, South-west). The studied parameters were frequency, age, sex, localization, histological type and the immuno-histochemical aspects. Results: A total of 2078 cases with an annual frequency of 20.78 cases were registered;the peak was reached in 2010 with 304 cases (14.62%). Cervical cancer was the main genital cancer affecting women with a percentage of 82.26%. The average age of the patients was 52.33 ± 12. 80 years old, with extremes from 22 to 93 years old. The age group from 40 to 59 had more than half of the cases, with 1094 cases (52.65%). The major histological types recorded were squamous cell cancer with 1687 cases (81.51%) and adenocarcinoma with 269 cases (12.95%). Conclusion: Cervical cancer is the chief genital cancer affecting female genital organs. The predominant histological types are squamous cell cancers.

关键词： Cancer Cervix Epidemiology Histopathology Cameroon

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WNT/β-catenin pathway and circadian rhythms in obsessive-compulsive disorder

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Neural Regeneration Research 2022年第10期17卷 2126-2130页

作者： Alexandre Vallée Yves lecarpentier jean-Noël Vallée Department of Clinical Research and Innovation(DRCI) Foch HospitalSuresnesFrance Centre de Recherche Clinique Grand Hôpital de l’Est Francilien(GHEF)MeauxFrance laboratoire de Mathématiques et Applications(lMA) Universitéde PoitiersPoitiersFrance Centre Hospitalier Universitaire(CHU)Amiens Picardie UniversitéPicardie Jules Verne(UPJV)AmiensFrance

The neuropsychiatric disease named obsessive-compulsive disorder is composed by obsessions and/or ***-compulsive disorder etiologies are ***,numerous mechanisms in several localizations are *** studies showed that both glutamate,inflammatory factors and oxidative stress could have main functions in obsessive-compulsive *** synthase kinase-3β,the major negative controller of the WNT/β-catenin pathway is upregulated in obsessive-compulsive *** obsessive-compulsive disorder,some studies presented the actions of the different circadian clock ***/β-catenin pathway and circadian clock genes appear to be ***,this review focuses on the interaction between circadian clock genes and the WNT/β-catenin pathway in obsessive-compulsive disorder.

关键词： circadian rhythms glutamatergic pathway inflammation obsessive-compulsive disorder oxidative stress WNT/β-catenin pathway

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Utility of combining spectral domain optical coherence tomography structural parameters for the diagnosis of early Glaucoma: a mini-review

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Eye and Vision 2018年第1期5卷 91-101页

作者： jean-Claude Mwanza Joshua l.Warren Donald l.Budenz Department of Ophthalmology School of MedicineUniversity of North Carolina at Chapel HillChapel HillNCUSA Department of Biostatistics Yale UniversityNew HavenCTUSA

Optical coherence tomography(OCT)has moved to the forefront of imaging modalities in the management of glaucoma and retinal *** is modifying how glaucoma and glaucoma progression are diagnosed clinically and augmenting our understanding of the *** provides multiple parameters from various anatomic areas for glaucoma diagnosis,evaluation of treatment efficacy,and progression *** the use of multiple parameters has increased the likelihood of detecting early structural changes,diagnosing glaucoma in early stages is often challenging when the damages are subtle and not apparent on OCT scans,in addition to the fact that assessment of OCT parameters often yields conflicting *** promising approach is to combine multiple individual parameters into a composite parameter from the same test to improve diagnostic accuracy,sensitivity,and *** review presents current evidence regarding the value of spectral domain OCT composite parameters in diagnosing early glaucoma.

关键词： Optical coherence tomography Combination of parameters Early glaucoma

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A Comparison of Carlin-type Gold Deposits：Guizhou Province,Golden Triangle,Southwest China,and Northern Nevada,USA

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地学前缘 2013年第1期20卷 1-18页

作者： jean S.CllNE John l.MUNTEAN Xuexiang GU Yong XIA University of Nevada las Vegas Nevada BareaH of Mines and Geology and University of Nevada Reno School of Earth Sciences and Resources China University of Geosiences(Beijing) State Key laboratory of Ore Deposit Geochemistry.Institute of Geochemistry.Chinese Academy of Sciemces

Several Au deposits in Guizhou Province,southwest China,described as being similar to the highly productive Carlin-type gold deposits in northern ***,were examined to identify similarities and differences between the two *** were collected along transects from lowto high-grade rock,where possible,and fram stockpiles at the Shuiyindong,Zimudang,Taipingdong,Yata and Jinfeng(formerly lannigou)*** used to examine ore and alteration minerals included hand-sample description:reflectance spectroscopy using an ASD Terraspec spectrometer;analyses of hand samples by carbonate staining with Alizaren red and potassium ferricyanide;transmitted and reflected light petrography;chemical analyses,mineral identification,and imaging using a ***-5610 scanning electron microscope:and quantitative chemical analyses using a JEOl JXA-8900 electron probe *** analyses of hand samples for 52 elements were done by AlS *** indicate both similarities and differences between the two *** districts have similar geologic *** deposits at both locations appear to have formed as a result of similar tectonic *** the district in southwest China lacks evidence of eoeval felsic igneous activity;however,the ore-stage minerals and the fluids that produced the minerals and deposits have some significant *** Nevada deposits were dominated by fluid-rock reaction in which host rock Fe was sulfidized to form Au-bearing *** ore fluids sulfidized host rock Fe in the Cuizhou *** timing of Fe metasomatism is unknown,so whether the deposits formed in response to sulfidation or pyritization is ***-rock reaction between an acidic,aqueous fluid and highly reactive calcareous rocks in Nevada caused extensive decarbonatization of host rocks,jasperoid replacemerit of carbonate minerals,and alteration of silty rock components to illite and *** Guizhou,CO2-bearing ore flu

关键词：地质地理学地质构造气藏

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Ultrafast synthesis and sintering of materials in a single running experiment approach by using electric fields

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Journal of Advanced Ceramics 2019年第2期8卷 265-277页

作者： lílian M.JESUS Ronaldo S.SIlVA jean-Claude M’PEKO Sao Carlos Institute of Physics University of Sao Paulo(USP)P.O.Box:369CEP:13560-970 Sao CarlosSPBrazil Group of Advanced Ceramic Materials Department of PhysicsFederal University of Sergipe(UFS)CEP:49100-000 Sao CristovaoSEBrazil Department of Physics Federal University of Sao Carlos(UFSCar)13560-905 Sao CarlosSPBrazil

Processing of materials in the form of ceramics normally involves several steps including calcination at a relatively low temperature for synthesis of the end-product powder and sintering at a high temperature for *** work we have been developing introduces a novel approach enabling synthesis plus sintering of materials in a single running experiment by using electric fields,ending with dense ceramics that display grains noticeably finer than in conventional *** new paradigm is fully illustrated with experiments conducted on amorphous CaCu3Ti4O12 precursor powder,shown to experience,on heating,crystallization through intermediate phases,followed by chemical reaction leading to synthesis of the end-product powder,plus densification depending on field *** processing time and furnace temperature are considerably reduced,demonstrating that enhanced synthesis and sintering rates applied under field *** results found in Bi2/3Cu3Ti4O12are also *** different factors that may contribute to this unique scenario,including Joule heating,defect generation,and reduction of free energy for nuclei formation promoted by the applied field,are briefly ***,the findings we bring here are exclusive as they show an exploitable way that allows rapid processing of materials with good control over particle and grain coarsening.

关键词： field-assisted processing synthesis sintering microstructure dielectric response

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