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Dietary selenium supplementation, clarified egg yolk extender and slow cooling improve cryopreserved sperm characteristics of Saanen buck

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Asian pacific Journal of Reproduction 2021年第1期10卷 43-48页

作者： Kambulu Lukusa Abubeker hassen Khoboso C.Lehloenya Department of Animal and Wildlife Sciences University of PretoriaPrivate Bag X20Hatfield0028South Africa Department of Agriculture University of ZululandPrivate Bag X1001KwaDlangezwa3886South Africa

Objective:To evaluate the effect of cooling rates,selenium supplementation,and three semen extenders on cooled and frozen-thawed Saanen buck ***:Twenty Saanen bucks were divided into two groups:the selenium supplemented group and the control *** were collected once weekly by artificial *** first experiment examined the effects of cooling rates and selenium supplementation on semen characteristics of Saanen *** semen was diluted with triladyl extender and split into two aliquots for slow and fast *** second experiment explored the effect of selenium supplementation and semen extenders on post-cryopreserved sperm *** from each group were divided into three aliquots and diluted with three extenders(*** egg-yolk,whole egg yolk,Tris without egg-yolk extenders).All samples were cooled for 2 h at 4℃and frozen at-196℃for 24 *** sperm characteristics such as sperm motility,acrosome integrity,normal morphology,and viability were evaluated by using a phase-contrast ***:In the first experiment,all sperm characteristics were significantly increased in selenium supplemented samples when slow cooling was used(P<0.05).In the second experiment,in cooled semen,sperm motility and viability were significantly increased in both clarified egg yolk and Tris without egg yolk extenders in selenium supplemented samples as compared with whole egg yolk extender,respectively(P<0.05).After freezing-thawing,all sperm parameters of selenium supplemented samples in clarified egg yolk extender were significantly greater than those in Tris without egg yolk extender(P<0.05).However,normal morphology and acrosome integrity of selenium supplemented samples in whole egg yolk extender were similar to those of selenium supplemented samples in clarified egg yolk ***:The characteristics of cooled and post-cryopreserved sperm are greater when clarified egg yolk extender is used in semen from selenium supp

关键词： Extenders Sperm characteristics Cryopreservation Selenium Cooling rates

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Calculation of Photo-Ionisation Cross Sections and Radiative Recombination Rate Coefficients for CO and CO^+ Molecules

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Plasma Science and Technology 2014年第11期16卷 1013-1019页

作者： Raja DHOUIOUI Philippe TEULET Yann CRESSAULT hassen GHALILA Riadh RIAHI Nejm Eddine JAIDANE Zohra BEN LAKHDAR Université de Toulouse UPSINPTLAPLACE(Laboratoire Plasma et Conversion d'Energie)118 route de NarbonneF-31062 Toulouse cedex 9France Laboratoire de Spectroscopic Atomique Moléculaire et Applications(LSAMA)Faculté des Sciences de TunisUniversité de Tunis el Manar1060 TunisTunisia

A method based upon the weighted total cross section （WTCS） theory is proposed to calculate the photo-ionisation cross sections and the radiative recombination rate coefficients between the fundamental level of CO and the main electronic states of its corresponding ion. Total photo-ionisation cross sections and radiative recombination rate coefficients are determined from the calculation of elementary vibrational photo-ionisation cross sections. Transitions be- tween CO＋（X, A and B） and CO（X） are considered. Total photo-ionisation cross sections and recombination coefficients are computed in the temperature interval 500-15000 K.

关键词： CO photo-ionisation cross sections radiative recombination rate coefficients

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Shift Endpoint Trace Selection Algorithm and Wavelet Analysis to Detect the Endpoint Using Optical Emission Spectroscopy

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Photonic Sensors 2016年第2期6卷 158-168页

作者： Sihem BEN ZAKOUR hassen TALEB Higher Institute of Management Tunis University of Tunis Tunisia Higher institute of Business and Accounting Bizerte University of Carthage Tunisia

Endpoint detection （EPD） is very important undertaking on the side of getting a good understanding and figuring out if a plasma etching process is done on the right way. It is truly a crucial part of supplying repeatable effects in every single wafer. When the film to be etched has been completely erased, the endpoint is reached. In order to ensure the desired device performance on the produced integrated circuit, many sensors are used to detect the endpoint, such as the optical, electrical, acoustical/vibrational, thermal, and frictional. But, except the optical sensor, the other ones show their weaknesses due to the environmental conditions which affect the exactness of reaching endpoint. Unfortunately, some exposed area to the film to be etched is very low （〈0.5%）, reflecting low signal and showing the incapacity of the traditional endpoint detection method to determine the wind-up of the etch process. This work has provided a means to improve the endpoint detection sensitivity by collecting a huge numbers of full spectral data containing 1201 spectra for each run, then a new unsophisticated algorithm is proposed to select the important endpoint traces named shift endpoint trace selection （SETS）. Then, a sensitivity analysis of linear methods named principal component analysis （PCA） and factor analysis （FA）, and the nonlinear method called wavelet analysis （WA） for both approximation and details will be studied to compare performances of the methods mentioned above. The signal to noise ratio （SNR） is not only computed based on the main etch （ME） period but also the over etch （OE） period. Moreover, a new unused statistic for EPD, coefficient of variation （CV）, is proposed to reach the endpoint in plasma etches process.

关键词： Dimension reduction OES plasma etching process wavelet analysis CV SNR

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Dimensional(premenstrual symptoms screening tool)vs categorical(mini diagnostic interview,module U)for assessment of premenstrual disorders

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World Journal of Psychiatry 2022年第4期12卷 603-614页

作者： Rifka Chamali Rana Emam Ziyad R Mahfoud hassen Al-Amin Department of Research Weill Cornell Medicine-QatarDoha 00974Qatar Department of Psychiatry Hamad Medical CorporationDoha 00974Qatar Department of Medical Education Weill Cornell Medicine-QatarDoha 00974Qatar Division of Epidemiology Department of Population of Health SciencesWeill Cornell MedicineNew York 10065NYUnited States Department of Psychiatry Weill Cornell Medicine-QatarDoha 00974Qatar

BACKGROUND Premenstrual syndrome(PMS)is the constellation of physical and psychological symptoms before *** dysphoric disorder(PMDD)is a severe form of PMS with more depressive and anxiety *** Mini international neuropsychiatric interview,module U(MINI-U),assesses the diagnostic criteria for probable *** Premenstrual Symptoms screening tool(PSST)measures the severity of these *** To compare the PSST ordinal scores with the corresponding dichotomous MINI-U *** Arab women(n=194)residing in Doha,Qatar,received the MINI-U and *** Operating Characteristics(ROC)analyses provided the cut-off scores on the PSST using MINI-U as a gold *** All PSST ratings were higher in participants with positive responses on *** addition,ROC analyses showed that all areas under the curves were significant with the cutoff scores on *** This study confirms that the severity measures from PSST can recognize patients with moderate/severe PMS and PMDD who would benefit from immediate treatment.

关键词： Premenstrual symptoms screening tool Premenstrual dysphoric disorder Arabs Categorical vs dimensional classification

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Laboratory pull-out tests on fully grouted rock bolts and cable bolts:Results and lessons learned

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Journal of Rock Mechanics and Geotechnical Engineering 2017年第5期9卷 843-855页

作者： Isabelle Thenevin Laura Blanco-Martín Faouzi Hadj-hassen Jacques Schleifer Zbigniew Lubosik Aleksander Wrana MINES ParisTech Department of Geosciences PSL Research University 35 rue Saint Honoré Fontainebleau Cedex 77305 France Department of Extraction Technology and Mining Support Central Mining Institute (GIG) Katowice Poland

Laboratory pull-out tests were conducted on the following rock bolts and cable bolts:steel rebars,smooth steel bars,fiberglass reinforced polymer threaded bolts,flexible cable bolts,IR5/IN special cable bolts and Mini-cage cable *** diameter of the tested bolts was between 16 mm and 26 *** bolts were grouted in a sandstone sample using resin or cement *** tests were conducted under either constant radial stiffness or constant confining pressure boundary conditions applied on the outer surface of the rock *** most tests,the rate of displacement was about 0.02 mm/*** tests were performed using a pull-out bench that allows testing a wide range of *** paper provides an extensive database of laboratory pull-out test results and confirms the influence of the confining pressure and the embedment length on the pull-out response(rock bolts and cable bolts).It also highlights the sensitivity of the results to the operating conditions and to the behavior of the sample as a whole,which cannot be neglected when the test results are used to assess the bolt-grout or the grouterock interface.

关键词： Pull-out test Fully grouted bolts Laboratory-scale Confining pressure Embedment length Bolt-grout interface

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Effect of Absorption of Patch Antenna Signals on Increasing the Head Temperature

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Computer Modeling in Engineering & Sciences 2020年第8期124卷 683-701页

作者： Mohamed Abbas Ali Algahtani Amir Kessentini hassen Loukil Muneer Parayangat Thafasal Ijyas Abdul Wase Mohammed Electrical Engineering Department College of EngineeringKing Khalid UniversityAbha61421Saudi Arabia Department of Mechanical Engineering College of EngineeringKing Khalid UniversityAbha61421Saudi Arabia Department of Computers and Communications College of EngineeringDelta University for Science and TechnologyGamasa35712Egypt Laboratory of Electromechanical Systems(LASEM) National Engineering School of SfaxUniversity of SfaxSfax3038Tunisia Electronics and Information Technology Laboratory University of SfaxNational Engineering School of SfaxSfax3038Tunisia Research Center for Advanced Materials Science King Khalid UniversityAbha61413Saudi Arabia Nabeul’s Foundation Institute for Engineering Studies University of CarthageIPEINNabeul8000Tunisia

Every new generation of antennas is characterized by increased accuracy and faster transmission ***,patch antennas have been known to damage human *** type of antenna sends out electromagnetic waves that increase the temperature of the human head and prevent nerve strands from functioning *** paper examines the effect of the communication between the patch antenna and the brain on the head’s temperature by developing a hypothetical multi-input model that achieves more accurate *** inputs are an individual’s blood and tissue,and the emission power of the *** forces depend on the permeability and conductivity characteristics of the metal from which the antenna is *** proposed model is the first one that links the material the antenna is manufactured from and the head’s *** results show that there are only a small number of materials that should be used as antenna *** materials are in the form of thin *** using these thin films at different temperatures,the risk to the head can be *** paper finds that the best results were obtained when the patch antenna was made of one of the following materials operating at a specific temperature:traditional materials at 305°K;casting cast steel at around 295°K;bismuth telluride(Bi2Te3)at 290°K;or barium sodium niobate at 310°K.

关键词： Brain patch antenna head overheating waves behavior materials properties

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Isolation and characterization of facultative mixotrophic ammonia-oxidizing bacteria from constructed wetlands

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Journal of Environmental Sciences 2011年第10期23卷 1699-1708页

作者： Soulwène Kouki Neila Saidi Fadhel M'hiri Houda Nasr Hanène Cherif Hadda Ouzari Abdennaceur hassen Laboratory of Treatment and Water Recycling Centre of Research and Water TechnologiesTechnopark of Borj-CedriaBP 2738020SolimanTunisia Unit of Transfer and Innovation Technologies Tunis International Centre for Environmental TechnologiesBoulevard of the Leader Yasser ArafatLa Charguia1080TunisTunisia Laboratory of Microbiology and Active Biomolecules Department of BiologyFaculty of Sciences of Tunis2092TunisTunisia

Autotrophic ammonia-oxidizing bacteria （AOB） have been widely studied in constructed wetlands systems, while mixotrophic AOB have been less thoroughly examined. Heterotrophic bacteria were isolated from wastewater and rhizospheres of macrophytes of constructed wetlands, and then cultivated in a mixotrophic medium containing ammonium and acetic acid. A molecular characterization was accomplished using ITS-PCR amplification, and phylogenetic analysis based on 16S rRNA gene Sequences. Results showed the presence of 35 bacteria, among 400 initially heterotrophic isolates, that were able to remove ammonia. These 35 isolates were classified into 10 genetically different groups based on ITS pattern. Then, a collection of 10 isolates were selected because of their relatively high ammonia removal efficiencies （ARE≥ 80%） and their phylogenetic diversity. In conditions of mixotrophy, these strains were shown to be able to grow （increase of optical density OD660 during incubation with assimilation of nitrogen into cellular biomass） and to oxidize ammonia （important ammonia oxidation efficiencies, AOE between 79% and 87%）. Among these facultative mixotrophic AOB, four isolates were genetically related to Firmicutes （Bacillus and Exiguobacterium）, three isolates were affiliated to Actinobacteria （Arthrobacter） and three other isolates were associated with Proteobacteria （Pseudomonas, Ochrobactrum and Bordetella）.

关键词： ammonia-oxidizing bacteria mixotroph constructed wetlands ammonia oxidation macrophytes' rhizosphere

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Static Analysis of Functionally Graded Sandwich Plates Using an Efficient and Simple Refined Theory

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Chinese Journal of Aeronautics 2011年第4期24卷 432-433页

作者： Hadj Henni ABDELAZIZ hassen Ait ATMANE Ismail MECHAB Lakhdar BOUMIA Abdelouahed TOUNSI Adda Bedia El ABBAS Laboratoire des Matériaux et Hydrologie Université de Sidi Bel Abbes Département de Génie Civil Université Ibn Khaldoun Département de Génie Civil Faculté de Génie Civil et d'Architecture Univesité de Chlef Département de Physique Université de Sidi Bel Abbes

In this paper, a new displacement based high-order shear deformation theory is introduced for the static response of functionally graded sandwich plate. Unlike any other theory, the number of unknown functions involved is only four, as against five in case of other shear deformation theories. The theory presented is variationally consistent, has strong similarity with classical plate theory in many aspects, does not require shear correction factor, and gives rise to transverse shear stress variation such that the transverse shear stresses vary parabolically across the thickness satisfying shear stress free surface conditions. Two common types of functionally graded sandwich plates, namely, the sandwich with fimctionally graded facesheet and homogeneous core and the sandwich with homogeneous facesheet and functionally graded core, are considered. Governing equations are derived from the principle of virtual displacements. The closed-form solution of a simply supported rectangular plate subjected to sinu- soidal loading has been obtained by using the Navier method. The validity of the present theory is investigated by comparing some of the present results with those of the classical, the first-order and the other higher-order theories. It can be concluded that the proposed theory is accurate and simple in solving the static bending behavior of functionally graded sandwich plates.

关键词： functionally graded materials sandwich plates refined plate theory bending Navier solution

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How to protect liver graft with nitric oxide

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World Journal of Gastroenterology 2011年第24期17卷 2879-2889页

作者： hassen Ben Abdennebi Mohamed Amine Zaoualí Izabel Alfany-Fernandez Donia Tabka Joan Roselló-Catafau Laboratory of Human Physiology Faculty of PharmacyUniversity of Monastir Unit of Experimental Hepatic IschemiaReperfusion Institut of d'Investigacions Biomèdiques de BarcelonaConsejo Superior de Investigaciones Científicas Unitat de Transplantament de Fetge i Viabilitat de l'Empelt Institut d'Investigacions Biomèdiques August Pi i Sunyer

Organ preservation and ischemia reperfusion injury associated with liver transplantation play an important role in the induction of graft injury. One of the earliest events associated with the reperfusion injury is endothelial cell dysfunction. It is generally accepted that endothelial nitric oxide synthase （e-NOS） is cell-pro- tective by mediating vasodilatation, whereas inducible nitric oxide synthase mediates liver graft injury after transplantation. We conducted a critical review of the literature evaluating the potential applications of regulating and promoting e-NOS activity in liver preservation and transplantation, showing the most current evidence to support the concept that enhanced bioavailability of NO derived from e-NOS is detrimental to ameliorate graft liver preservation, as well as preventing subse- quent graft reperfusion injury. This review deals mainly with the beneficial effects of promoting ＂endogenous＂ pathways for NO generation, via e-NOS inducer drugs in cold preservation solution, surgical strategies such as ischemic preconditioning, and alternative ＂exogenous＂ pathways that focus on the enrichment of cold storage liquid with NO donors. Finally, we also provide a basic bench-to-bed side summary of the liver physiology and cell signalling mechanisms that account for explaining the e-NOS protective effects in liver preservation and transplantation.

关键词： Cold ischemia reperfusion injury Endotheli-al nitric oxide synthase Nitric oxide Liver graft preser-vation Ischemic preconditioning Liver transplantation

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Correlation between welding and hardening parameters of friction stir welded joints of 2017 aluminum alloy

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Transactions of Nonferrous Metals Society of China 2012年第5期22卷 1064-1072页

作者： hassen BOUZAIENE Mohamed-Ali REZGUI Mahfoudh AYADI Ali ZGHAL Research Unit in Solid Mechanics Structures and Technological Development(99-UR11-46)Higher School of Sciences and Techniques of TunisTunisia

An experimental study was undertaken to express the hardening Swift law according to friction stir welding （FSW） aluminum alloy 2017. Tensile tests of welded joints were run in accordance with face centered composite design. Two types of identified models based on least square method and response surface method were used to assess the contribution of FSW independent factors on the hardening parameters. These models were introduced into finite-element code ＂Abaqus＂ to simulate tensile tests of welded joints. The relative average deviation criterion, between the experimental data and the numerical simulations of tension-elongation of tensile tests, shows good agreement between the experimental results and the predicted hardening models. These results can be used to perform multi-criteria optimization for carrying out specific welds or conducting numerical simulation of plastic deformation of forming process of FSW parts such as hydroforming, bending and forging.

关键词： friction stir welding response surface methodology face centered central composite design hardening simulation relative average deviation criterion

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