|
|
|
题名
|
作者
|
年代
|
出处
|
被引量
|
| 1 | Luminescence of Er^(3+) in Oxyfluoride Transparent Glass-Ceramics显示文摘Erbium doped silicate, germanate, and tellurium-germanate oxyfluoride glasses were prepared in a bulk form. Through appropriate heat treatment of the as-prepared glasses, transparent glass-ceramics (TGCs) were obtained with the formation of β-PbF2∶Er 3+ nanocrystals in the glass matrix were confirmed by X-ray diffraction. Well-defined diffraction peaks were observed in the samples after heat-treatment. The average crystal diameter of these precipitated crystals from full-width at half-maximum (FWHM) of the diffraction peak was estimated to be between 8 and 13 nm. Optical absorption, photoluminescence, and upconversion luminescence were measured on as-prepared glass and glass-ceramics. Luminescence spectra in the TGC samples revealed well-resolved, sharp stark-splitting peaks, which indicates that a majority of Er 3+ ions has been incorporated into the crystalline phase of the nanocrystals. The intensity of the visible and near infrared luminescence mostly increases in TSG compared to that in the as-prepared glass. In 1.53 μm absorption and emission bands, the maximum absorption peak is blue-shifted from 1531 to 1507 nm, whereas the maximum emission peak is red-shifted from 1535 to 1543 nm in TGC, as compared with that in glass. The bandwidth at half-maximum (BWHM) of the emission band is significantly broader in TGC than in glass, which is beneficial to the erbium-doped fiber amplifier (EDFA). Upconversion luminescence was measured using 800 nm near-infrared light excitation. Drastically increased upconversion luminescence was observed from the TGC as compared to that from their corresponding as-prepared glasses. In addition to a strong green emission centered at 545 nm because of 4S 3/2 →4I 15/2 transition and a weaker red emission centered at 662 nm because of 4F 9/2 →4I 15/2 transition, generally seen from the Er 3+ doped glasses, two violet emissions centered at 410 nm because of 2H 9/2 →4I 15/2 transition and centered at 379 nm because of 4G 11/2 →4I 15/2 transition were also observed from the TGC. The increased luminescence was attributed to the decreased effective phonon energy and the increased energy transfer between the excited ions when Er 3+ ions were incorporated into the precipitated β-PbF2 nanocrystals. The results indicated two attractive spectroscopic properties of the Er 3+ doped TGC samples, compared to glass samples, namely a reduced multiphonon decay rate and a reduced inhomogeneous broadening. In addition, these oxyfluoride TGC materials were robust, easy and flexibile to process, and possible to be fabricated in the fiber form for device applications. | Akira Ueda Steven H Morgan Richard Mu | 2006 | Journal of Rare Earths2006，24，6： | 7 |
| 2 | Epigenetic profiles of pre-diabetes transitioning to type 2 diabetes and nephropathy显示文摘AIM: To examine DNA methylation profiles in a longitudinal comparison of pre-diabetes mellitus(Pre-DM) subjects who transitioned to type 2 diabetes mellitus(T2DM).METHODS: We performed DNA methylation study in bisulphite converted DNA from Pre-DM(n = 11) at baseline and at their transition to T2 DM using Illumina Infinium Human Methylation27 Bead Chip, that enables the query of 27578 individual cytosines at Cp G loci throughout the genome, which are focused on the promoter regions of 14495 genes.RESULTS: There were 694 Cp G sites hypomethylated and 174 Cp G sites hypermethylated in progression from Pre-DM to T2 DM, representing putative genes involved in glucose and fructose metabolism, inflammation, oxidative and mitochondrial stress, and fatty acid metabolism. These results suggest that this high throughput platform is able to identify hundreds of prospective Cp G sites associated with diverse genes that may reflect differences in Pre-DM compared with T2 DM. In addition, there were Cp G hypomethylation changes associated with a number of genes that may be associated with development of complications of diabetes, such as nephropathy. These hypomethylation changes were observed in all of the subjects.CONCLUSION: These data suggest that some epigenomic changes that may be involved in the progression of diabetes and/or the development of complications may be apparent at the Pre-DM state or during the transition to diabetes. Hypomethylation of a number of genes related to kidney function may be an early marker for developing diabetic nephropathy. | Thomas A Vander Jagt Monica H Neugebauer Marilee Morgan Donald W Bowden Vallabh O Shah | 2015 | World Journal of Diabetes2015，6，9： | 5 |
| 3 | Genomic prediction of fruit texture and training population optimization towards the application of genomic selection in apple显示文摘Texture is a complex trait and a major component of fruit quality in apple.While the major effect of MdPG1,a gene controlling firmness,has already been exploited in elite cultivars,the genetic basis of crispness remains poorly understood.To further improve fruit texture,harnessing loci with minor effects via genomic selection is therefore necessary.In this study,we measured acoustic and mechanical features in 537 genotypes to dissect the firmness and crispness components of fruit texture.Predictions of across-year phenotypic values for these components were calculated using a model calibrated with 8,294 SNP markers.The best prediction accuracies following cross-validations within the training set of 259 genotypes were obtained for the acoustic linear distance(0.64).Predictions for biparental families using the entire training set varied from low to high accuracy,depending on the family considered.While adding siblings or half-siblings into the training set did not clearly improve predictions,we performed an optimization of the training set size and composition for each validation set.This allowed us to increase prediction accuracies by 0.17 on average,with a maximal accuracy of 0.81 when predicting firmness in the‘Gala’בPink Lady’family.Our results therefore identified key genetic parameters to consider when deploying genomic selection for texture in apple.In particular,we advise to rely on a large training population,with high phenotypic variability from which a‘tailored training population’can be extracted using a priori information on genetic relatedness,in order to predict a specific target population. | Morgane Roth Hélène Muranty Mario Di Guardo Walter Guerra Andrea Patocchi Fabrizio Costa | 2020 | Horticulture Research2020，7，1： | 4 |
| 4 | Cardiac troponin I measurement with the ACCESS immunoassay system:analytical and clinical performance characteristics 显示文摘 | Apple F S Morgan D L | 1998 | Clin Chem1998，44，： | 1 |
| 5 | Regional cerebral activation in irritable bowel syndrome and control sllbjeets with painful and nonpaiof-ul rectaldis tentiend 显示文摘 | Mortz H Morgan V Tamer G | 2010 | Gastroenterolog)2010，118，： | 1 |
| 6 | Compucations of surgery for arteriovenous maiformation of the brain显示文摘 | Morgan M K Johnston I H Haulan J M | 1993 | J Neurosurg1993，78，： | 1 |
| 7 | Determination of a Morphological Phase Diagram of Titania/titanate Nanostructures from Alkaline Hydrothermal Treatment of Degussa P25 显示文摘 | MORGAN D L ZHU H Y FROST R L | 2008 | Chem Mater2008，20，： | 1 |
| 8 | Blood component use in critically ill patients显示文摘 | Rao MP Boralessa H Morgan C | 2002 | Anaesthesia2002，57，： | 1 |
| 9 | Correction of subnormal fertility with copper and magnesium supplementation显示文摘 | Ingraham R H Kappel L C Morgan E B | 1987 | Journal of Dairy Science1987，701，： | 1 |
| 10 | The first signs of language:Phonological development in British Sign Language显示文摘 | Morgan G Barrett-Jones S Stoneham H | 2007 | Applied Psycholinguistics2007，28，01： | 1 |
| 11 | Introduction - Processes of continental rifting 显示文摘 | Morgan P Baker B H | 1983 | Tectonophysics1983，94，： | 1 |
| 12 | Sulphur dioxide resistance in Saccharomyces cerevisiae and Saccharomycodes ludwigii显示文摘 | Stratford M Morgan P Rose A H | 1987 | Journal of General Microbiology1987，133，： | 1 |
| 13 | The remarkable Re-Os chronometer in molybdenite:how and why it works 显示文摘 | Stein H J Markey R J Morgan J W | 2001 | Terra Nova2001，13，： | 1 |
| 14 | Critical evaluation of Mirels' rating system for impending pathologic fractures 显示文摘 | Damron TA Morgan H Prakash D | 2003 | Clin Orthop Relat Res2003，，415： | 1 |
| 15 | Assessment of erosion hazard with the USLE and GIS:a case study of the upper Ewaso Ng'iro North Basin of Kenya显示文摘 | Mati B M Morgan R P C Gichuki F N Quinton J N Brewer T R Liniger H P | | 0，，02： | 1 |
| 16 | The remarkable Re Os chronometer in molybdenite:How and why it works显示文摘 | Stein H J iarkey R J Morgan J W | | 0，，： | 1 |
| 17 | Regional cerebral activation in irritable bowel syndrome and control subjects with painful and nonpainful rectal distention 显示文摘 | Mertz H Morgan V Tanner G | 2000 | Gastroenterology2000，118，5： | 1 |
| 18 | Instabilities in Detonation Waves Near the Limits of Propagation 显示文摘 | Edwards D H Morgan J M | 1977 | Journal of Physics D: Applied Physics1977，10，17： | 1 |
| 19 | Flammability of polysty rene layered silicate (clay) nanocomposites: Carbonaceous charformation 显示文摘 | Alexander B Morgan L Richard H | 2002 | Fire Mater2002，26，2： | 1 |
| 20 | RASTA processing of spe-ech显示文摘 | MORGAN N | 1994 | IEEE Trans on Speech and Audio Processing1994，2，4： | 1 |
您所在的机构暂未开通此部分的功能，请联系管理员