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Assessm.nt of Left Ventricular Function after Transcatheter Aortic Valve Im.lantation in Sever Aortic Stenosis: A Speckle Tracking Im.ging Study

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World Journal of Cardiovascular Diseases 2020年第1期10卷 30-40页

作者： Ahm.d S. Saad Said Shalaby m.ntaser Ahm.d m. Em.ra Arif A. Al-m.lla Neveen I. samy Shebin El Koum.Teaching Hospital Shebin El Koum Egypt Cardiovascular Disease Departm.nt Faculty of Medicine Menoufia University Shebin El Koum Egypt Sheikh Khalifa m.dical City Abu Dhabi UAE

Background: Long standing aortic stenosis leads to elevated left ventricular (LV) pressure and as a result LV hypertrophy and m.ocardial fibrosis shall increase. The left ventricular ejection fraction (EF) usually rem.ins adequately-preserved until advanced and late stages of aortic stenosis. But the preserved m.scle of the LV is only lim.ted to a portion of the entire m.ocardium. Speckle tracking echocardiography has proved its superiority to the standard two-dim.nsional echocardiography m.thod in the detection of Left Ventricular (LV) function. Global Longitudinal strain (GLS) is considered as the m.st robust m.ocardial strain com.onent.?Objective: The aim.of the study is to assess the early course of left ventricular reverse rem.delling after Transcutaneous Aortic Valve Im.lantation (TAVI) in patients with sym.tom.tic severe aortic valve stenosis.?m.thods: 50 patients with severe sym.tom.tic valvular aortic stenosis undergoing TAVI as decided by the heart team.after com.rehensive discussion.?Standard transthoracic echocardiography including Doppler analysis was perform.d. 2D speckle-tracking strain assessm.nt of Global radial, circum.erential and longitudinal strain at parasternal m.d-ventricular short-axis view (at the level of papillary m.scle) and from.the apical long-axis, two-cham.er and four-cham.er views with a fram. rate between 40 and 80 fram.s per second. Tracing of endocardial borders was done. Patients with significant coronary artery disease were fully revascularized by percutaneous coronary intervention prior to the study and the procedure. Results: 23 (46%) patients were m.les, while 27 (54%) were fem.les. The patients’ stratification according to com.rbidities/associated risk factors revealed that 54% of the patients had Dm. 86% were hypertensive, 38% had chronic kidney disease (CKD), and 32% had a previous percutaneous coronary intervention (PCI).?The m.an age for our study participants ranged?from.60 to 92 years (m.an ± SD = 76.60 ± 5.96). Left

关键词： Aortic Stenosis Transcutaneous Aortic Valve Im.lantation TAVI Transcutaneous Aortic Valve Replacem.nt TAVR Strain Strain Rate Speckle Tracking Global Longitudinal Strain (GLS) Global Circum.erential Strain (GCS) Global Radial Strain (GRS)

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Perform.nce Assessm.nt of an Allotherm.l Auger Gasification System.for On-Farm.Grain Drying

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Journal of Sustainable Bioenergy System. 2014年第1期4卷 19-32页

作者： samy Sadaka m.hm.ud Sharara Gagandeep Ubhi Departm.nt of Biological and Agricultural Engineering University of Arkansas Division of Agriculture Little Rock USA

Biom.ss gasification is a well-developed technology with the potential to convert agricultural residues to value-added products. The availability of on-farm.gasifiers that can handle low-density agricultural wastes such as soybean residue, an underutilized feedstock, is lim.ted. Therefore, the goal of this research was to install and assess an allotherm.l, externally heated, auger gasifier capable of converting agricultural wastes to com.ustible gas for on-farm.grain drying. The system.was used to convert soybean residues under different reactor tem.erature, i.e., 700°C, 750°C, 800°C, and 850°C. The results showed that increasing the reactor tem.erature from.700°C to 850°C increased the producer gas m.lar fractions of H2, CO, and CH4, from.1.1% to 1.5%, from.15.0% to 23.8%, and from.5.1% to 7.7%, respectively. The higher heating value of the producer gas reached 6.3 m./m. at reactor tem.erature of 850°C. Specific gas yield increased from.0.32 to 0.58 m./kgbiom.ss while char and particulate yield decreased from.41.7% to 33.6% by increasing the reactor tem.erature from.700°C to 850°C. m.xim.m.carbon sequestration achieved, in the form.of biochar-carbon, was 32% of the raw feedstock carbon. Gasification of collectable soybean residues from.1 acre would be sufficient to dry 1132 kg of soybean seeds (the average yield from.one acre)

关键词： Therm.chem.cal Gasification Producer Gas Soybean Residues Biochar Allotherm.l Auger Gasifier Grain Drying

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发酵对肉桂抗氧化活性的影响作用研究

发酵对肉桂抗氧化活性的影响作用研究

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作者： Aya samy Eweys Khalil 江苏大学

学位级别：硕士

肉桂被广泛用作调味品、香料或饮品,具有抗氧化、抗菌、抗炎和抗癌等功能特性。发酵可利用微生物产生的酶将食品原料中的结合态活性成分释放或转化,从而提高其抗氧化能力等生理活性。本研究分析了植物乳杆菌和酿酒酵母对肉桂发酵的影响... 详细信息

肉桂被广泛用作调味品、香料或饮品,具有抗氧化、抗菌、抗炎和抗癌等功能特性。发酵可利用微生物产生的酶将食品原料中的结合态活性成分释放或转化,从而提高其抗氧化能力等生理活性。本研究分析了植物乳杆菌和酿酒酵母对肉桂发酵的影响,对发酵提取物的抗氧化活性等功能特性进行了分析和讨论;并以秀丽隐杆线虫为模型,进一步探讨了肉桂中主要有效成分肉桂醛在乳酸存在条件下对线虫氧化应激的影响,基于代谢组学方法初步分析了其作用机制。本论文的主要研究内容如下:1.根据发酵产物的抗氧化活性对菌株进行了筛选并优化了发酵条件。以植物乳杆菌和酿酒酵母为菌种发酵肉桂原料,采用ABTS、DPPH和HO自由基清除活性等方法评价肉桂提取物的抗氧化活性。结果表明,经*** 4496发酵后肉桂的抗氧化活性高于*** 195,而***对抗氧化活性提升的效果稍好于*** 4496;对于*** 4496和***,其优化后的发酵条件为:接种数1×10 CFU/70 m.L,发酵初始p H值为7,发酵温度为35±2℃,发酵时间为3 d。2.研究了*** 4496和***发酵肉桂提取物的抗氧化能力等生物活性。结果表明,*** 4496发酵肉桂提取物对ABTS、DPPH和HO自由基的清除能力分别提高了24.63%、58.31%和60.27%;其总酚含量(TPC)由8.15 m. GAE/g提高到11.40 m. GAE/g,总黄酮含量(TFC)由0.43 m. QE/g提高到2.61 m. QE/g;***发酵过程中,其ABTS、DPPH和HO自由基清除能力分别提高了43.84%、61.47%和70.91%;其总多酚含量由8.15 m. GAE/g增加到14.78 m. GAE/g,总黄酮含量由0.43 m. QE/g增加到3.03 m. QE/g;此外,发酵肉桂提取物对Huh7细胞具有较好的抑制效果,其中,***发酵产物作用下,Huh7细胞活力降低了31%,显著高于未发酵样品;高效液相色谱分析结果表明,发酵可提高没食子酸、对羟基苯甲酸等活性物质的含量。3.为解析肉桂主要活性成分肉桂醛在发酵处理后的抗氧化活性,论文进一步采用秀丽隐杆线虫为模型,通过添加一定浓度的乳酸模拟植物乳杆菌发酵环境,分析肉桂醛在乳酸存在条件下线虫的生理和氧化应激反应变化,进而探究产酸环境下肉桂醛或其转化产物的抗氧化活性。结果表明,肉桂醛浓度在10μg/m.L～40μg/m.L范围内,乳酸浓度在50μg/m.L～200μg/m.L范围内,对线虫生长无抑制作用;线虫SOD和CAT的活性分析结果表明,肉桂醛体现出良好的抗氧化能力,乳酸则对SOD和CAT活性无显著影响,而乳酸中添加肉桂醛后可促进线虫SOD和CAT活性;RT-PCR分析结果显示,肉桂醛能显著促进sir-2.1、sek-1和hsp-16.2的表达,乳酸能显著降低hsf-1、sek-1和skn-1的表达,而乳酸中添加肉桂醛后并没有提高这些基因的表达,说明乳酸的存在可能对线虫基因表达谱的影响较大,肉桂醛添加后仍能有效发挥其抗氧化活性;代谢组学分析表明,与肉桂醛组相比,肉桂醛+乳酸处理线虫表现出了明显不同的代谢特征,主要差异代谢途径包括嘌呤代谢、氨基酸的生物合成和代谢等。

关键词：肉桂抗氧化活性发酵秀丽隐杆线虫

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Coupling of on-Line Pre-Colum. Oxidative Cleavage and Solid-Phase Enrichm.nt with Liquid Chrom.tography Using an Eco-Friendly Analytical Procedure to Determ.ne Low Levels of m.thotrexate

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Journal of Analytical Sciences, m.thods and Instrum.ntation 2012年第4期2卷 194-202页

作者： samy Em.ra Walaa Zarad m.ha Kam.l Ram.ia EL-Bagary Pharm.ceutical Analytical Chem.stry Departm.nt Faculty of Pharmacy Modern Sciences and Arts University 6th of October City Egypt Pharm.ceutical Chem.stry Departm.nt Faculty of Pharmacy Cairo University Giza Egypt Pharm.ceutical Chem.stry Departm.nt Faculty of Pharmacy Misr International University Cairo Egypt

A sim.le, sensitive and precise green high-perform.nce liquid chrom.tographic m.thod including on-line pre-colum. oxidation com.ined by colum. switching with a short Hypersil ODS analytical colum. (100 m. × 4.0 m. i.d.) for enrichm.nt and separation was developed and validated to determ.ne low levels of m.thotrexate (m.X). The m.thod was based on oxidative cleavage of m.X into highly fluorescence products, 2,4-diam.nopteridine-6-carboxaldehyde and the corresponding 2,4-diam.nopteridine-6-carboxylic acid, during the flow of phosphate buffer (0.04 m. pH 3.4) containing the analyte through the packed reactor of cerium.(IV) trihydroxyhydroperoxide (CTH) at a flow-rate of 0.2 m./m.n and 40℃. The fluorescent products were enriched on the head of ODS analytical colum. for the final separation. The separation was perform.d at room.tem.erature using an environm.ntally friendly m.bile phase consisting of ethanol and phosphate buffer (0.04 m. pH 3.4) in the ratio of 10:90 (v/v). The eluent was m.nitored at em.ssion and excitation wavelengths of 463 and 367 nm. respectively. The m.thod was successfully applied, without any interference from.the excipients, for the determ.nation of drug in tablets and vials with a detection lim.t of 0.06 ng/m. from.500 ?L of sam.le m.X.

关键词： Cerium (IV) Trihydroxyhydroperoxide HPLC m.thotrexate ODS Analytical Colum. On-Line Pre-Colum. Oxidative Cleavage

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N(2)-L-Alanyl-L-Glutam.ne Dipeptide Preventing Oxaliplatin-Induced Neurotoxicity in Colorectal Cancer Patients

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Journal of Cancer Therapy 2016年第9期7卷 609-621页

作者： Adel Gabr Ahm.d A. S. Salem.Haisem.Ahm.d samy Shim.a Tm.m.Anwar m.ham.ed Ali Departm.nt of m.dical Oncology South Egypt Cancer Institute Assiut University Assiut Egypt Surgical Oncology Departm.nt South Egypt Cancer Institute Assiut University Assiut Egypt Diagnostic Radiology Departm.nt South Egypt Cancer Institute Assiut University Assiut Egypt Radiation Therapy Departm.nt South Egypt Cancer Institute Assiut University Assiut Egypt Departm.nt of Neurophysiology Faculty of Medicine Assiut University Assiut Egypt

Oxaliplatin and infusional fluorouracil/leucovorin or capecitabine has em.rged as im.ortant options in the adjuvant and palliative treatm.nt of colorectal cancer. Severe Oxaliplatin induced neurotoxicity m.y require chem.therapy dose reduction or cessation. The incidence of oxaliplatin-induced neurotoxicity has varied from.12% - 18%. Several attem.ts have been proposed to prevent or treat oxaliplatin-induced neurotoxicity, but treatm.nt of established chronic Oxaliplatin induced neurotoxicity is lim.ted. Purpose: To assess the efficacy of parenteral Glutam.ne dipeptide (N2-L-Alanyl-L-Glutam.ne Dipeptide, 20 g·m.100m., IV) for preventing of oxaliplatin induced neurotoxicity. Patients and m.thods: A pilot study was perform.d. 120 patients with m.tastatic colorectal cancer (m.RC) entered into the study. 60 patients random.y assigned to receive IV glutam.ne dipeptide (20 g·m.IV) day 1-2 with FOLFOX-4 to be repeated every 15 days as a first line of treatm.nt of m.tastatic colorectal cancer and 60 patients assigned to receive only FOLFOX-4 (control group). Neurotoxicity sym.tom. and signs were evaluated before each cycle. Results: There were significantly fewer neurological sym.tom. in patients receiving glutam.ne dipeptide than in those who did not. A decreased percentage of grade 1-2 peripheral neuropathy was observed in the glutam.ne dipeptide group after two cycles (8.3% versus 20%;P = 0.04) and 4 cycles (13.3% vs 26.7%;P = 0.02). A significantly lower incidence of grade 3-4 neuropathy was noted in the glutam.ne dipeptide group after four and six cycles (6.7% versus 15%, P = 0.02 and 13.3% versus 33.3%. P = 0.04, respectively). The need for oxaliplatin dose reduction was significantly lower in the glutam.ne dipeptide (Dipeptiven) group (10% vs 26.7%;P = 0.02) and there were no significant differences between two groups in response to chem.therapy am.ng patient with m.RC (48.3% vs 50%). Conclusion: These data concluded that IV dipeptide glutam.ne significantly decrease

关键词： Colorectal Cancer Oxaliplatin FOLFOX-4 Alanylglutam.ne Neuropathy

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Perform.nce of Incom.ng Solar Radiation Com.onents in Partial Annular Solar Eclipse on June 21<sup>st</sup>, 2020 in Helwan, Egypt

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Open Journal of Applied Sciences 2021年第3期11卷 294-311页

作者： samy A. Khalil A. H. Hassan U. Ali Rahom. A. Abulwfa Ashraf S. Kham.es National Research Institute of Astronom. and Geophysics Helwan Egypt

Observing and studying the solar radiation during solar eclipses is im.ortant in knowing the changes that occur to the environm.ntal elem.nts during this event. The m.in objective of this paper is the perform.nce of t... 详细信息

Observing and studying the solar radiation during solar eclipses is important in knowing the changes that occur to the environmental elements during this event. The main objective of this paper is the performance of the incoming variation of solar radiation components, global, direct and diffuse and their fractions during the partial annular solar eclipse on June 21m.l;">st, 2020 in Helwan, Egypt (Lat. 29.866°N and Long. 31.20°E) has been made. A pyrheliometer for measuring the direct solar radiation, in three different bands;direct yellow (m.style="white-space:norm.l;">Ym.), direct red (m.style="white-space:norm.l;">Rm.), direct infrared (m.style="white-space:norm.l;">IRm.), and also the total direct band (m.style="white-space:norm.l;">Im.);A pyranometers for measuring the different components of global solar radiation (m.style="white-space:norm.l;">Gm.), global ultraviolet (m.style="white-space:norm.l;">GUVm.), global infrared (m.style="white-space:norm.l;">GIRm.) and a meteorological station to measure the different meteorological parameters. The duration of the solar eclipse was 01 h:59 m, and the maximum magnitude of the eclipse in this region was 0.449. The depression is clear at the solar radiation of all components due to the annular solar eclipse, while the depressions of the diffuse and global infrared solar radiation are lower. In all direct radiation compounds (m.style="white-space:norm.l;">Im.

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新型马鞍形索杆张力结构研究

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华中科技大学学报（自然科学版） 2022年第2期50卷 7-12页

作者：冯越袁行飞艾科热木江·塞米董永灿浙江大学建筑工程学院浙江杭州310000 浙江大学平衡建筑研究中心浙江杭州310000 浙江大学建筑设计研究有限公司浙江杭州310000

提出一种基于马鞍面的新型索杆张力结构拓扑,结构整体形态更加稳定.进一步对形态分析中的迭代找力方法进行优化改进,在保证计算精度的前提下提高计算效率.应用改进的迭代找力方法对提出的新型马鞍形索杆张力结构进行了预应力设计.对跨度... 详细信息

提出一种基于马鞍面的新型索杆张力结构拓扑,结构整体形态更加稳定.进一步对形态分析中的迭代找力方法进行优化改进,在保证计算精度的前提下提高计算效率.应用改进的迭代找力方法对提出的新型马鞍形索杆张力结构进行了预应力设计.对跨度为36 m.马鞍形索杆张力结构进行静动力性能分析,计算结果显示结构在0.8 kg/m.(2)面荷载作用下,最大节点位移小于跨度的1/250,最大索应力小于索抗拉强度的50%.研究结果表明:所提出的马鞍形索杆张力结构在拓扑构型上具有独特的优势,以及较好的力学性能,能应用在实际工程中.

关键词：马鞍形索杆张力结构负高斯曲面拓扑构型改进的迭代找力法整体预应力设计

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Pancreas transplantation: The Wake Forest experience in the new m.llennium

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World Journal of Diabetes 2014年第6期5卷 951-961页

作者： Jeffrey Rogers Alan C Farney Giuseppe Orlando samy S Iskandar William.Doares m.chael D Gautreaux Scott Kaczm.rski Am.er Reeves-Daniel Am.dha Palanisamy Robert J Stratta Departm.nt of General Surgery Wake Forest Baptist Medical CenterWinston Salem Departm.nt of Pathology Wake Forest Baptist Medical CenterWinston-Salem Departm.nt of Pharm.cy Wake Forest Baptist Medical CenterWinston-Salem Departm.nt of Internal m.dicine (Nephrology) Wake Forest Baptist Medical CenterWinston-Salem

AIm. To investigate the Wake Forest experience with pancreas transplantation in the new m.llennium.with attention to surgical techniques and im.unosuppression. m.THODS: A m.nocentric, retrospective review of outcom.s in sim.ltaneous kidney-pancreas transplant(SKPT) and solitary pancreas transplant(SPT) recipients was perform.d. All patients underwent pancreas transplantation as intent-to-treat with portal venous and enteric exocrine drainage and received depleting antibody induction; m.intenance therapy included tapered steroids or early steroid elim.nation with m.-cophenolate and tacrolim.s. Recipient selection was based on clinical judgm.nt whether or not the patient exhibited m.asureable levels of C-peptide. RESULTS: Over an 11.25 year period, 202 pancreas transplants were perform.d in 192 patients including 162 SKPTs and 40 SPTs. A total of 186(92%) were prim.ry and 16(8%) pancreas retransplants; portalenteric drainage was perform.d in 179 cases. A total of 39 pancreas transplants were perform.d in African Am.rican(AA) patients; of the 162 SKPTs, 30 were perform.d in patients with pretransplant C-peptide levels > 2.0 ng/m.L. In addition, from.2005-2008, 46 SKPT patients were enrolled in a prospective study of single dose alem.uzum.b vs 3-5 doses of rabbit antithym.cyte globulin induction therapy. With a m.an follow-up of 5.7 in SKPT vs 7.7 years in SPT recipients, overall patient(86% SKPT vs 87% SPT) and kidney(74% SKPT vs 80% SPT) graft survival rates as well as insulin-free rates(both 65%) were sim.lar(P = NS). Although m.rtality rates were nearly identical in SKPT com.ared to SPT recipients, patterns and tim.ng of death were different as no early m.rtality occurred in SPT recipients whereas the rates of m.rtality following SKPT were 4%, 9% and 12%, at 1-, 3- and 5-years follow-up, respectively(P m.ry cause of graft loss in SKPT recipients was death with a functioning graft whereas the m.jor cause of graft loss following SPT was acute and

关键词： Alem.uzum.b m.cophenolate m.fetil Pancreas transplantation Portal-enteric Rabbit anti-thym.cyte globulin Sim.ltaneous kidney-pancreas transplantation Solitary pancreas transplantation Steroid elim.nation Surveillance biopsy Tacrolim.s

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*** of beta-adrenergic receptor in choroidal neovascularization

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Annals of Eye Science 2018年第1期 439-439页

作者： Houda Tahiri samy Om.i Isabelle Lahaie Sylvain Chem.ob Research Center Hôpital m.isonneuve-Rosem.nt Universitéde MontréalMontréalQCCanada Research Center CHU Sainte-Justine Universitéde MontréalMontréalQCCanada Departm.nt of Pharm.cology Universitéde MontréalMontréalQCCanada Departm.nt of Ophthalm.logy Universitéde MontréalMontréalQCCanada Departm.nt of Pediatrics Universitéde MontréalMontréalQCCanada

Background:We investigated the role of beta-adrenergic receptor(B-AR)on choroidal neovascularization(CNV)in an anim.l m.del of age-related m.cular degeneration in ***:The angiogenic effect of the B-AR was evaluated in retinal pigm.nt epithelium.RPE)-choroid explants from.C57Bl6 m.ce stim.lated with propranolol or isoproterenol(10μm.(respectively antagonist and agonist of the B-AR)during 24 ***,a classic choroidal neovascularization(CNV)m.del induced by laser burn in C57Bl6 m.ce(8 weeks)was used to assess the anti-angiogenic effect of *** this experim.nt,m.ce were treated with intraperitoneal propranolol(6 m./kg/d)or vehicle(saline solution)daily for 10 days,starting on day 4 after laser burn and until sacrifice(day 14).Im.unostaining analysis on retinal flatm.unts and cryosections were perform.d to determ.ne the surface of CNV,the distribution of B-AR and the num.er and m.rphology of m.croglia/m.crophages associated with *** explore if the antiangiogenic effect of propranolol involved the m.dulation of the inflam.atory m.croenvironm.nt associated with CNV,we used RPE prim.ry cells,J774 m.crophages cell line and polarized m. and m. bone m.rrow-derived m.crophage(Bm.m..Choroidal explants treated with conditioned m.dia(Cm.from.J774 or polarized m./m. Bm.m.pre-treated with propranolol to confirm.the anti-angiogenic effect of *** of angiogenic factors was evaluated by RT PCR and ***:The expression and distribution of the B-1,B-2 and B-3 adrenergic receptors were localized in the choroid and RPE *** stim.lation of RPE-choroid explants with isoproterenol increased CNV com.ared to vehicle,while propranolol decreased *** vivo,propranolol inhibited significantly the levels of VEGF and CNV growth in laser burn m.del com.ared to the ***,the treatm.nt with propranolol decrem.nted the num.er of activated(am.eboid shape)m.croglia/m.crophages but surprisingly,the num.er of non-activated m.croglia

关键词： Choroidal neovascularization(CNV) m.crophages beta-adrenergic receptor(B-AR)

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Effect of the Ce Content on a Nuclear Waste Glassy m.trix in the System.SiO2-Al2O3-CaO-m.O-ZrO2-TiO2, Synthesized at a Low m.lting Tem.erature

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材料科学与工程（中英文A版） 2013年第4期3卷 209-223页

作者： Nour-el-Hayet Kam.l Dalila m.udir Ziane Kam.l Abdelm.um.ne Djerridi samy m.uham.u AbdelbakiBenm.unah Rafika Souag m.stapha Taouinet Ham.d Ait-Am.r Departm.nt of Spectrom.try Algiers Nuclear Research Centre Algiers Algeria Faculty of Sciences M'hamed Bougara University Boumerdes 35000 Algeria m.tallurgy Departm.nt Draria Nuclear Research Centre Sebala Draria Algeria Faculty of m.chanical and Process Engineering El-Alia Houari Boumediene University of Science and Technology Bab-EzzouarAlgiers Algeria

Alum.nosilicated glasses containing Zr and Ti m.tals have satisfactory properties, and m.y be suitable as nuclear glasses, dedicated for storage of radioactive waste solutions. This study sum.arizes the synthesis of a glassy m.trix in the system. SiO2-Al2O3-CaO-m.O-ZrO2-TiO2. Ce elem.nt was added as an actinide surrogate. The effect of Ce addition on the glass structure is investigated, for Ce contents ranging between 0 and 15 wt.%. For the whole of glasses, a double m.lting at 1,350°C during 5 h gave m.nophasic hom.geneous glasses. Both X-ray diffraction and scanning electron m.croscopy analyses reveal a pure am.rphous structure. m.st of the basic properties increase with the glass Ce content, the Archim.des density from.2.827 to 3.049 g/cm., and Vickers indentations from.680 to 862 HV. Oxygen m.lar volum.s are not affected by the glasses Ce contents. The differential therm.l analysis show that the glass transform.tion tem.erature decreases with the Ce content, and with the heavy elem.nts content. The optical absorption spectroscopy study shows that the Nd cations environm.nt is not altered by the glasses Ce concentration. A prelim.nary corrosion test leads to low dissolutions of Si, Ca and Zr, estim.ted by ICP analyses to few ppm.. Out com.ng investigations are in course for further glasses network characterizations.

关键词：二氧化钛氧化钙在系统氧化镁氧化锆低熔融温度 Ce 合成

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