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Radiation protection knowledge and practices among Moroccan dentists:A cross-sectional study

Radiation Medicine and Protection 2024年第2期5卷 131-138页

作者： Naoual elmorabit Majdouline Obtel Mohamed Azougagh Oumkeltoum ennibi Laboratory of Research on Oral Biology and Biotechnology Faculty of Dental MedicineMohammed V UniversityRabatMorocco Department of Public Health Faculty of Medicine and PharmacyMohammed V UniversityRabatMorocco National Graduate of Arts and Crafts(eNSAM) Mohammed V UniversityRabatMorocco

Objective:To analyze the current status of knowledge and practices among the Moroccan dentists in the region of Rabat-Sale-Kenitra,towards radiation ***:This is a cross-sectional study based on a questionnaire related to knowledge and practice regarding radiation protection of patients and dental staff from April to June *** study sample included 325 dentists practicing in the Rabat-Sale-Kenitra *** target population consisted of all dentists working in public,semipublic and private ***:96.6%of dentists were aware of radiation ***,nearly 35%were aware of ALARA(as low as reasonably achievable)principle and 73.9%thought that dental X-rays are harmful.63.6%of subjects used digital image *** 16.7%of them used a film holder and more than 60%didn't follow the position and distance *** median knowledge score was 7[5,9],and there was a statistically significant difference according to dentist qualification(P=0.007),dental radiation protection continuous training(Pe(P=0.007)and years of experience(P=0.039).The median practice score was 5[4,6]and there was a statically significance association according to workplace setting(P=0.001).There was a significant positive relationship between knowledge score and practice score(r=0.24,Pentist qualification(OR 0.51,95%CI:0.27–0.94,P=0.03)and continuous training(OR 2.40,95%CI:1.47–3.93,Pere significant predictors of knowledge,while workplace setting(OR 0.54,95%CI:0.32–0.93,P=0.027)and knowledge score(OR 1.24,95%CI:1.12–1.38,Pere predictors of ***:Improving dentists'knowledge of radiation protection measures and tools as well as dose reduction techniques could increase their safe practices in dental radiology.

关键词： Dentists Radiation protection Awareness Dental radiography

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Perturbations in the earthworm metabolite profile during a two-week exposure to metformin

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emerging Contaminants 2024年第3期10卷 221-229页

作者： J.D.Gillis G.W.Price S.O.Prasher Department of Bioresource engineering McGill UniversityFaculty of Agricultural and Environmental SciencesMacdonald-Stewart Building MS1-02721111 Lakeshore RoadSainte-Anne-de-BellevueQuebecH9X 3V9Canada Department of engineering Dalhousie UniversityFaculty of Agriculture39 Cox RoadPO Box 550TruroNova ScotiaB2N 5E3Canada

Metformin is among the most prescribed pharmaceuticals in many countries,and as a result has shown up in biosolids derived from municipal wastewater treatment that are destined for land *** humans taking metformin,the effects include reduced glucose uptake in the intestine,a reduction in gluconeogenesis,increased oxidation of fatty acids,and reduced fatty acid *** effects of metformin on soil-dwelling organisms are not well *** study tested the effects of metformin exposure(0,10,40,160,640μg g^(-1))on the earthworm(***)at four time points(6 h,2 d,7 d,and 14 d)using GC-MS to reveal sub-lethal effects and elucidate potential modes of action for *** were no mortalities obse.v.d,and earthworms exposed to the highest concentrations(160 and 640μg g^(-1))gained weight relative to the control on days 7 and *** reductions on day 7 were obse.v.d for glucose and malic acid(consistent with a reduction in gluconeogenesis),and for palmitic and margaric acid(consistent with increased oxidation and reduced synthesis of fatty acids).Lactic acid ranked first and second among canonicals 1 and 2 respectively and led to significant differences in discriminant scores across concentration and *** levels increased to equal or greater than the control on day 14,likely caused by reduced exposure as metformin is reported to be readily transformed by microorganisms under aerobic *** obse.v.tions were consistent with the known effects of metformin in humans,and suggests that a similar mode of action exists in earthworms.

关键词： Metabolites Toxicity earthworms Metformin GC-MS

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Tracking the Ti^(4+)substitution in phlogopite by spectroscopic imaging:A tool for unravelling the growth of micas at HP-HT conditions

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Geoscience Frontiers 2024年第3期15卷 1-13页

作者： G.Della ventura N.el Moutaouakkil B.Boukili S.Bernardini A.Sodo L.Pronti M.Cestelli-Guidi F.Holtz F.Lucci Dipartimento di Scienze UniversitàRoma TreRomaItaly INFN-LNF via Fermi 200040 FrascatiRomaItaly INGv Via di Vigna Murata 60500143 RomaItaly Laboratory of Géosciences Water and Environment.Department of Earth Sciences.Faculty of SciencesUniversity Mohammed VRabatMorocco Leibnitz Universität Hannover Institute of MineralogyCallinstr 330167 HannoverGermany Dipartimento di Scienze della Terra e Geoambientali Universitàdi Bari“Aldo Moro”BariItaly

Phlogopite solid-solutions have a wide pressure-temperature(P-T)stability field and are ubiquitous in a wide.v.riety of geological settings,from deep lithosphere magmatic e.v.ronments to upper crust metamorphic *** composition represents therefore a valuable physical-chemical archive and may provide important information regarding its crystallization and the petrogenesis of the *** this paper we examine the phlogopite phenocrysts from the well-known Fort Regent mica-bearing lamprophyre minette from ***(Island of Jersey,UK).Phlogopite phenocrystals from lamprophyres generally show normal-step and continuous compositional zoning,however those from the Fort Regent minette show a peculiar texture characterized by dark brown high-Ti(average TiO_(2)≈8.5 wt.%)cores e.v.loped by euhedral low-to mid-amplitude zonation due to oscillatory contents in Ti,Fe and ***-barometry modelling based on biotite-only composition yields relatively high P-T estimates(T≈970±54℃at P≈0.73±0.13 GPa)for cores whereas lower values(T≈790±54℃at P≈0.29±0.13 GPa)are obtained for the outer *** temperatures(T≈1075±54℃)but extremely high and anomalous pressure.v.lues(P≈1.82±0.13 GPa)are obtained for the yellowish inner *** combination of electron micro probe(eMP)analysis and single-crystal infra-red(FTIR)imaging in the OH-stretching region shows that the exceptional and oscillatory Ti contents are due to the Ti-vacancy substitution,typical of crystallization and growth processes of HP/HT *** imaging provides additional insight for this process,confirming the dominant dioctahedral nature for the Ti-Fe-rich cores and outer *** of thermobaric estimates obtained from the phlogopite compositiononly model,based on the fine-scale compositional evolution,shows that pressure-temperature.v.lues from low-Ti high-Mg domains should be carefully evaluated because the substitution mechanisms during the dark mica growth are not univocal

关键词： Ti-phlogopite Jersey minette(UK) Ti-substitution FTIR imaging Raman imaging Thermobarometric modelling

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通过差热分析对YBCO高温超导织构体生长极限的研究

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低温物理学报 2002年第2期24卷 102-105页

作者：何振辉,赵艳娥,J.Riches,D.Litzkendorf,A.Surzhenko,W.Gawalek 中山大学物理系中山大学物理系 institut für Physikalishe Hochtechnologie e.v. institut für Physikalishe Hochtechnologie e.v. institut für Physikalishe Hochtechnologie e.v. institut für Physikalishe Hochtechnologie e.v. 广州510275 广州510275

通过差热分析研究成分变化对YBa2 Cu3O7-δ/Y2 BaCuO5(YBCO)高温超导织构体系列的熔化温度和固化反应温度的影响 ,结合排推效应所产生的成分不均匀性 ,分析了超导体初始组分为YBa2 Cu3O7-δ+xY2 O3的织构生长极限 .发现含约 6～ 7wt% (... 详细信息

通过差热分析研究成分变化对YBa2 Cu3O7-δ/Y2 BaCuO5(YBCO)高温超导织构体系列的熔化温度和固化反应温度的影响 ,结合排推效应所产生的成分不均匀性 ,分析了超导体初始组分为YBa2 Cu3O7-δ+xY2 O3的织构生长极限 .发现含约 6～ 7wt% (或 5 0mol% )CuO时 ,固化温度出现明显极小值

关键词：生长极限反应温度固化反应固化温度包晶反应包晶转变极小值熔化温度差热分析液相区织构生长工艺超导体分凝系数 YBCO

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exploring the effects of dietary inulin in rainbow trout fed a high‑starch,100%plant‑based diet

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Journal of Animal Science and Biotechnology 2024年第2期15卷 713-732页

作者： Raphaël Defaix Jep Lokesh Laura Frohn Mickael Le Bechec Thierry Pigot vincent veron Anne Surget Sandra Biasutti Frederic Terrier Sandrine Skiba-Cassy Jerome Roy Stephane Panserat Karine Ricaud Universite de Pau et Des Pays de L’Adour E2S UPPAINRAENUMEASaint‑Pee‑Sur‑NivelleFrance Universite de Pau et Des Pays de L’Adour E2S UPPACNRSIMT Mines AlesIPREMPauFrance Universite de Pau et Des Pays de L’Adour E2S UPPAIUT des Pays de l’AdourDepartement Genie BiologiqueMont de MarsanFrance.

Background High dietary carbohydrates can spare protein in rainbow trout(Oncorhynchus mykiss)but may affect growth and ***,a prebiotic,could have nutritional and metabolic effects,along with anti-inflammatory properties in teleosts,improving growth and *** tested this hypothesis in rainbow trout by feeding them a 100%plant-based diet,which is a viable alternative to fishmeal and fish oil in aquaculture *** a two-factor design,we examined the impact of inulin(2%)as well as the.v.riation in the carbohydrates(CHO)/plant protein ratio on rainbow *** assessed the influence of these factors on zootechnical parameters,plasma metabolites,gut microbiota,production of short-chain fatty acids and lactic acid,as well as the expression of free-fatty acid receptor genes in the mid-intestine,intermediary liver metabolism,and immune markers in a 12-week feeding *** The use of 2%inulin did not significantly change the fish intestinal microbiota,but interestingly,the high CHO/protein ratio group showed a change in intestinal microbiota and in particular the beta diversity,with 21 bacterial genera affected,including Ralstonia,Bacillus,and 11 lactic-acid producing *** were higher levels of butyric,and valeric acid in groups fed with high CHO/protein diet but not with *** high CHO/protein group showed a decrease in the expression of pro-inflammatory cytokines(il1b,il8,and tnfa)in liver and a lower expression of the genes coding for tight-junction proteins in mid-intestine(tjp1a and tjp3).However,the 2%inulin did not modify the expression of plasma immune ***,inulin induced a negative effect on rainbow trout growth performance irrespective of the dietary *** With a 100%plant-based diet,inclusion of high levels of carbohydrates could be a promising way for fish nutrition in aquaculture through a protein sparing effect whereas the supplementation of 2%inulin does not appear to improve the use of CHO wh

关键词： Aquaculture Fish nutrition Gut microbiota Immune markers Intermediary metabolism Inulin Prebiotic Rainbow trout Short-chain fatty acids

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Delayed allogeneic skin graft rejection in CD26-deficient mice

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Cellular & Molecular Immunology 2019年第6期16卷 557-567页

作者： Xiangli Zhao Kai Zhang Peter Daniel Natali Wisbrun Hendrik Fuchs Hua Fan institut fur Laboratoriumsmedizin Klinische Chemie und PathobiochemieCVKCharite-Universitatsmedizin BerlinBerlinGermany College of Food Science and Technology Shanghai Ocean UniversityShanghaiPR China Max-Delbrück-Center for Molecular Medicine BerlinGermany Leibniz-institut für Molekulare Pharmakologie im Forschungsverbund Berlin e.v. BerlinGermany

Organ transplantation is an effective therapeutic tool for treating many terminal ***,one of the biggest challenges of transplantation is determining how to achieve the long-term survival of the allogeneic or xenogeneic transplant by,for example,preventing transplant *** the current study,CD26 gene-knockout mice were used to investigate the potential role of CD26/dipeptidyl peptidase-4(DPPIv)in allogeneic skin graft rejection by tail-skin *** with wild-type(CD26^(+/+))counterparts,CD26^(-/-)mice showed reduced necrosis of grafts and delayed graft rejection after skin *** of serum IgG,including its subclasses IgG1 and IgG2a,were significantly reduced in CD26^(-/-)mice during graft ***,after allogeneic skin transplantation,the secretion levels of the cytokines IFN-γ,IL-2,IL-6,IL-4,and IL-13 were significantly reduced,whereas the level of the cytokine IL-10 was increased in the serum of CD26^(-/-)mice compared with that in the serum of CD26^(+/+)***,the concentration of IL-17 in serum and the percentage of cells secreting IL-17 in mouse peripheral blood lymphocytes(MPBLs)were both significantly lower,while the percentage of regulatory T cells(Tregs)was significantly higher in MPBLs of CD26^(-/-)mice than in those of CD26^(+/+)***,a lower percentage of CD8^(+)T cells in MPBLs and fewer infiltrated macrophages and T cells in graft tissues of CD26^(-/-)mice were detected during graft *** results indicate that CD26 is involved in allogeneic skin graft rejection and provides another hint that CD26 deficiency leads to less rejection due to lower activation and proliferation of host immune cells.

关键词： Allogeneic graft rejection CD26/DPPIv Cytokine IgG T lymphocytes

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Catalytic Cs<sub>2</sub>CO<sub>3</sub>Promotes “Silyl Method”-Type Polycondensation

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Open Journal of Polymer Chemistry 2012年第1期2卷 1-5页

作者： Claus vogel Jochen Meier-Haack Leibniz-institut für Polymerforschung Dresden e.v. Dresden Germany

Catalytic amounts of cesium carbonate are sufficient to initiate the “silyl method”-type step-growth polymerization of phenylene-bis-TMS-ethers and -thioethers with activated aryl fluoride monomers, and can thus be used instead of ce-sium fluoride or potassium carbonate. Cesium fluoride is very hygroscopic and potassium carbonate is generally used in equimolar amounts. The efficiency of catalytic amounts of cesium carbonate is demonstrated by the synthesis of poly(phenylene ether ether ketone) and poly(phenylene sulfide sulfone) examples.

关键词： Cesium Carbonate Polycondensation Step-Growth Polymerization

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CCD/eMCCD光电参数测试系统的设计与应用

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中国光学（中英文） 2024年第3期17卷 693-703页

作者：沈吉 vIACHeSLAv v.Zabudsky 常维静那启跃简云飞 OLeG v.Rikhalsky OLeKSANDR G.Golenkov vOLODYMYR P.Reva 华东光电集成器件研究所江苏苏州215263 乌克兰科学院v.e.Lashkaryov半导体物理研究所乌克兰基辅01001 乌克兰科学院Bogomoletz生理学研究所乌克兰基辅01001

本文开发了一种用于测量CCD和eMCCD(电子倍增CCD)芯片光电参数的测试系统。该测试系统通过自动模式或手动模式间的切换,测量器件的暗电流、读出放大器的响应度、电荷转移效率、电荷容量和其他参数。该测试系统可以针对不同规格和结构的C... 详细信息

本文开发了一种用于测量CCD和eMCCD(电子倍增CCD)芯片光电参数的测试系统。该测试系统通过自动模式或手动模式间的切换,测量器件的暗电流、读出放大器的响应度、电荷转移效率、电荷容量和其他参数。该测试系统可以针对不同规格和结构的CCD/eMCCD器件,实现CCD晶圆或封装好的成品的参数测试,实现576×288、640×512、768×576、1024×1024、1280×1024 CCD/eMCCD的测试和筛选。

关键词： CCD eMCCD 测试系统光电参数

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TAX MORALe IN CLASSICAL ATHeNS

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Journal of Ancient Civilizations 2019年第2期34卷 273-288,330页

作者： Wolfgang Franzen Forschungsstelle für empirische Sozialökonomik e.v.(fores)(Office for empirical Research on Social economics Cologne)

Tax psychology is an interdisciplinary approach to explain attitudes and behavior of *** tax-psychological surveys usually focus on empirical data from contemporary societies,this article relies on historical studies of classical *** suggest that,due to specific political,social,and cultural conditions,in classical Athens tax morale has been positive and tax compliance rather high.

关键词： CLASS contemporary explain

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Proton irradiation-induced cracking and microstructural defects in UN and (U,Zr)N composite fuels

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Journal of Materiomics 2024年第4期10卷 906-918页

作者： elina Charatsidou Maria Giamouridou Andrea Fazi Gyula Nagy Diogo Ribeiro Costa Sarmad Naim Katea Mikael Jolkkonen Gunnar Westin Mattias Thuvander Daniel Primetzhofer Pär Olsson KTH Royal institute of Technology StockholmSweden Chalmers University of Technology GothenburgSweden Uppsala University UppsalaSweden Westinghouse electric Sweden AB VästeråsSweden Höganäs Sweden AB HöganäsSweden

Proton irradiation with a primary ion energy of 2 Mev was used to simulate radiation damage in UN and(U,Zr)N fuel *** pellets,nominally at room temperature,were irradiated to peak levels of 0.1,1,10 dpa and 100.0 dpa resulting in a peak hydrogen concentration of at most 90 at.%.Microstructure and mechanical properties of the samples were investigated and compared before and after *** irradiation induced an increase in hardness,whereas a decrease in Young’s modulus was obse.v.d for both *** characterization revealed irradiation-induced cracking,initiated in the bulk of the material,where the peak damage was deposited,propagating towards the ***,transmission electron microscopy was used to study irradiation *** loops and fringes were identified and obse.v.d to increase in density with increasing dose *** high density of irradiation defects and hydrogen implanted are proposed as the main cause of swelling and consequent sample cracking,leading simultaneously to increased hardening and a decrease in Young's modulus.

关键词： Proton irradiation Uranium nitride Spark plasma sintering Irradiation induced cracking Simulated burn-up structure Composite nuclear fuels

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