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1562篇 您的检索式:作者名="RAYES D"
    题名 作者 年代 出处 被引量
1磷酸盐玻璃固化体化学耐蚀性研究显示文摘以在美国Washington州Hanford市存放的17类不同组成的高放射性核废料(highlevelradioactivenuclearwaste,HLW)为研究对象,设计了含Cr2O3为4%(质量分数,下同)的模拟HLW。采用25%~35%磷酸盐与含Cr2O3的65%~75%的HLW模拟组成相混合,经1150~1250℃加热处理数小时,能熔化成为均质玻璃体,然后冷却成固化体。用试样坚固法(productconsistencytest,PCT)测试包容70%和75%HLW的2种玻璃固化体的各元素,在90℃放置7d,元素沥析量总和分别为小于1.5g/m2和2.0g/m2。用蒸汽水化侵蚀法(vaporhydrationtest,VHT)对此2种试样在200℃的水蒸汽中进行水化侵蚀,经7d处理,平均被侵蚀的速率分别小于0.2g/(m2·d)和3.5g/(m2·d)。晶化处理后的此2种试样的PCT和VHT测试结果与晶化前基本相近。对HLW不同包容量的玻璃固化体的红外光谱分析表明:在较高的HLW包容量的玻璃固化体的结构中,容易被水化的(PO3)-结构转化为分离的(P2O7)4-或(PO4)3-。X射线衍射分析表明:玻璃固化体中分离的(P2O7)4-和(PO4)3-阴离子团被金属离子Al3+,Fe3+,Cr3+和Zr4+等所连接,形成O—Me—O—P键,不仅提高了玻璃的抗析晶的能力,而且也大大地提高了其化学稳定性。样品O/(Si+P)的摩尔比为3.7~4.1,从结构上也表明核废料包容量高达70%~75%的玻璃固化体有优良的?黄文旵 周萘 DAY D E RAY C S 2004硅酸盐学报2004,32,4:6
2Free radicals and grape seed proanthocyanidin extract: importance in human health and disease prevention显示文摘Debasis Bagchi Manashi Bagchi Sidney J Stohs Dipak K Das Sidhartha D Ray Charles A Kuszynski Shantaram S Joshi Harry G Pruess 2000Toxicology2000,,2:3
3Effect of planting date on the yield and fiber properties of three cotton cultivars显示文摘Bilrro J D Ray L L 1973Agronomy Journal1973,65,:2
4Glass and Mineral Chemistry of Northern Central Indian Ridge Basalts:Compositional Diversity and Petrogenetic Significance显示文摘The glass and mineral chemistry of basalts examined from the northern central Indian ridge (NCIR) provides an insight into magma genesis around the vicinity of two transform faults: Vityaz (VT) and Vema (VM). The studied mid-ocean ridge basalts (MORBs) from the outer ridge flank (VT area) and a near-ridge seamount (VM area) reveal that they are moderately phyric plagioclase basalts composed of plagioclase (phenocryst [An60-90] and groundmass [An35-79]), olivine (Fo81-88), diopside (Wo45-51, En25-37, Fs14-24), and titanomagnetite (FeOt~63.75 wt% and TiO2~22.69 wt%). The whole-rock composition of these basalts has similar Mg# [mole Mg/mole(Mg+Fe2+)] (VT basalt:~0.56-0.58; VM basalt:~0.57), but differ in their total alkali content (VT basalt:~2.65; VM basalt:~3.24). The bulk composition of the magma was gradually depleted in MgO and enriched in FeOt, TiO2, P2O5, and Na2O with progressive fractionation, the basalts were gradually enriched in Y and Zr and depleted in Ni and Cr. In addition, the ΣREE of magma also increased with fractionation, without any change in the (La/ Yb)N value. Glass from the VM seamount shows more fractionated characters (Mg#: 0.56-0.57) compared to the outer ridge flank lava of the VT area (Mg#: 0.63-0.65). This study concludes that present basalts experienced low-pressure crystallization at a relatively shallow depth. The geochemical changes in the NCIR magmas resulted from fractional crystallization at a shallow depth. As a consequence, spinel was the first mineral to crystallize at a pressure >10 kbar, followed by Fe-rich olivine at <10 kbar pressure.Dwijesh RAY Ranadip BANERJEE Sridhar D IYER Basavaraju BASAVALINGU Subir MUKHOPADHYAY4 2009Acta Geologica Sinica(English Edition)2009,83,6:2
5Molecular mechanisms of cardioprotection by a novel grape seed proanthocyanidin extract显示文摘Debasis Bagchi Chandan K Sen Sidhartha D Ray Dipak K Das Manashi Bagchi Harry G Preuss Joe A Vinson 2003Mutation Research - Fundamental and Molecular Mechanisms of Mutagenesis2003,,:2
6Risk factors for endophthalmitis following cataract surgery-our experience at a tertiary eye care centre in India显示文摘AIM: To determine the risk factors for acute endophthalmitis after cataract extraction in a tertiary care centre in India.·METHODS: We performed a nested case control study within a retrospective cohort. The surgical records of all patients with clinically diagnosed endophthalmitis within one month after cataract surgery, performed between January 2006 and December 2009, were reviewed. These were compared with randomly selected age and gender-matched controls, from patients having routine cataract surgery within ±1wk of the endophthalmitis case.Univariable and multivariable analysis were performed to identify risk factors for endophthalmitis.· RESULTS: Of the total 33 856 cataract surgeries performed during this period, there were 57 cases of postoperative acute endophthalmitis that met our study criteria. Thus, the overall incidence of endophthalmitis in our cohort was 1.6 per 1000 cataract extractions performed. Mean age of cases was 55.9y(SD: 10.9y) and for controls was 55.6y(SD: 9.8y). Thirty-five cases(61.4%)and 133 controls(59.6%) were males. Median time of onset of endophthalmitis was 4d(IQR 2-9d; range: 1-30d).Thirty-nine cases(68.4%) presented within 7d and 27 cases(47.4%) were culture positive. Two hundred and twenty-three age and gender matched controls were selected. In multivariate analysis, endophthalmitis was associated with posterior capsular rupture(PCR) during surgery(OR 6.98, 95%CI: 2.22-21.98), phacoemulsification via scleral incision with a foldable intraocular lens(IOL)implantation(OR 3.02, 95%CI: 1.13-8.04) and ocular comorbidity(OR 2.32, 95%CI: 1.11-4.87).·CONCLUSION: PCR, presence of ocular co-morbidity,and phacoemulsification via scleral incision with foldable-IOL were found to be independent risk factors for acute endophthalmitis.Rohit C.Khanna Vanita Pathak Ray Madhavi Latha Sandra D Cassard Annie Mathai Garudadri C Sekhar 2015International Journal of Ophthalmology(English edition)2015,8,6:2
7Spacecraft Navigation Using X-ray Pulsars 显示文摘Sheikh S I Pines D J Ray P S 2006Journal of Guidance Control and Dynamics2006,29,1:1
8Energy transfer in triton -X 100 micelles : a fluorescence study 显示文摘Saha D C Ray K Misra T N 2000Spectrochimica Acta A2000,56,:1
9Using antisense RNA to study gene function: inhibition of carotenoid biosynthesis in transgenic tomatoes显示文摘Bird C R Ray J A Fletcher J D 1991Biotechnology1991,9,:1
10Sin 1,amutation affecting female fertility in Arabidopsis,interacts with modl,its recessive modifier显示文摘LANG J D RAY S RAY A 1994Genetics1994,137,4:1
11Murine models of lupus induced by hypomethylated T cells显示文摘Richardson B Ray D Yung R 2004Methods Mol Med2004,102,:1
12On the measurement of polarization显示文摘ESTEBAN P RAY D 1994Econometrica1994,,4:1
13Influence of probiotics and fibre on the incidence of bacterial infections following major abdominal surgery-results of a prospective trial显示文摘Rayes N Seehofer D Muller AR 2002Z Gastroenterol2002,40,10:1
14Human bone marrow megakaryocytes and platelets express PPARgamma, and PPARgamma agonists blunt platelet release of CD 40 ligand and thromboxanes 显示文摘Akbiyik F Ray D M Gettings K F 2004Blood2004,104,5:1
15Early enteral supply of fiber and Lactobaeiili versus conventional nutrition: A controlled trial inpatients with major abdominal surgery显示文摘Rayes N Hansen S Seehofer D 2002Nutrition2002,18,78:1
16Comparative study of precipitation behavior and texture formation in continu- ously annealed Ti and Ti + Nb added interstitial -free high -strength steels 显示文摘Ghosh P Ray R K Ghosh C and Bhattacharjee D 2008Scripta Materialia2008,58,:1
17Acute and long-term safetyevaluation of a novel IH636 grape seed proanthocyanidin extract显示文摘Ray S Bagchi D Lim PM e( al 2001Res Commun Mol Pathol Pharmacol2001,109,34:1
18Bladder cancer:new TUR tech-niques显示文摘Wilby D Thomas K Ray E 2009World J Urol2009,27,3:1
19Synthesis and characterisation of day-supported titania photocatalysts显示文摘Lisa M D Ray L F Huai Y Z 0,,:1
20Non-linear least squares ellipse fitting using the genetic algorithm with applications to strain analysis显示文摘Anandaroop Ray Srivastava D C 2008Journal of Structural Geology2008,30,6:1
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