998 research outputs found
A new determination of molecular mobility in amorphous materials:
No full textThis research investigated how the steady-state and time-resolved emission and intensity of phosphorescence from vanillin (4-hydroxy-3-methoxy benzaldehyde), a commonly used flavor compound, can be used to probe molecular mobility when dispersed within amorphous pure sucrose films. The luminescence properties and photophysical events of vanillin as a triplet state probe in amorphous sucrose films as a function of temperature was successfully characterized. The peak energy, bandwidth and lifetime data suggest that it is sensitive to molecular mobility and can be used monitor molecular mobility in amorphous sucrose films. Time-resolved phosphorescence intensity decays from vanillin were multiexponential both below and above the glass transition temperature, indicating that the pure (single component) amorphous matrix was dynamically heterogeneous on the molecular level.
Vanillin analogs (hydroxy, dihydroxy and ethyl vanillin)) phosphorescence lifetime were found to be extremely sensitive to the local environment in the amorphous sucrose in the glassy state and at the glass-to-rubber transition into the melt, and provided useful insight about the mechanism of vanillin sensitivity to molecular mobility. Based on this the capability of movement of methoxyl group about the C-O bond is thought to be the contributor to sensitivity of vanillin to matrix molecular mobility. The other possibility is that the effect is not that of larger group but rather that of group (like methoxy and ethoxy) not able to hydrogen bond to matrix, which can have a coupling the probe vibrations to the matrix.
Vanillin phosphorescence demonstrated that the average rate of matrix molecular mobility rates increases with an increase in the molecular size and Tg of the sugar in the glucose homologous series. A comparative study of mobility in three excipients sucrose, trehalose and PVP, using vanillin phosphorescence provided useful insight about their stabilizing effect.
The phosphorescence from probes erythrosin B, vanillin and tryptophan was successfully utilized to measure molecular mobility on three different time scales corresponding to each probe in amorphous sucrose and protein film. Molecular mobility was successfully studied in amorphous sucrose films by monitoring phosphorescence from the dual probe combination of erythrosin B: vanillin, erythrosin B: tryptophan and vanillin:tryptophan.Ph.D.Includes bibliographical referencesby Rashmi Satyanarayan Tiwar
sj-docx-1-tam-10.1177_17588359231189422 – Supplemental material for PTEN in triple-negative breast carcinoma: protein expression and genomic alteration in pretreatment and posttreatment specimens
No full textSupplemental material, sj-docx-1-tam-10.1177_17588359231189422 for PTEN in triple-negative breast carcinoma: protein expression and genomic alteration in pretreatment and posttreatment specimens by Hui Chen, Qingqing Ding, Laila Khazai, Li Zhao, Senthil Damodaran, Jennifer K. Litton, Gaiane M. Rauch, Clinton Yam, Jeffrey T. Chang, Sahil Seth, Bora Lim, Alastair M. Thompson, Elizabeth A. Mittendorf, Beatriz Adrada, Kiran Virani, Jason B. White, Elizabeth Ravenberg, Xingzhi Song, Rosalind Candelaria, Banu Arun, Naoto T. Ueno, Lumarie Santiago, Sadia Saleem, Sausan Abouharb, Rashmi K. Murthy, Nuhad Ibrahim, Mark J. Routbort, Aysegul Sahin, Vicente Valero, William Fraser Symmans, Debu Tripathy, Wei-Lien Wang, Stacy Moulder and Lei Huo in Therapeutic Advances in Medical Oncology</p
Delving into the , processes
No full textTo shed light on the indirect search for new physics beyond the standard
model, the long standing discrepancies between the theory and experiment
mediated by FCNC quark level transitions set an ideal
testing ground. Though the very recent measurements of and are
consistent with the standard model, still the excitements remain on the
measurements of LHCb experiment with the observables which has deviations at the level of .
Additionally, standard deviation of and ,
respectively for in and the branching
ratio in processes are observed. Inspired by these
discrepancies, we work out the constraints on the new physics coupling
parameters in the presence of a non-universal model. We then probe the
exclusive leptonic decay channels , induced by the
neutral current transition . We find that the
variation of the observables, such as, branching ratio, forward-backward
asymmetry, lepton polarization asymmetry, and the very sensible observable, so
called non-universality observables for LFV decays display the sensitivity of
new physics. In this analysis. we estimate above mentioned observables that
could shed light on the window of new physics in the near future.Comment: I have updated the title of the paper. Also I have added few
references and changed the title of the image
Measurement of the branching fractions of → DK and → D decays at Belle II
No full textWe present measurements of the branching fractions of eight → DK, B → DK decay channels. The results are based on data from SuperKEKB electron-positron collisions at the Υ(4S) resonance collected with the Belle II detector, corresponding to an integrated luminosity of 362 fb. The event yields are extracted from fits to the distributions of the difference between expected and observed B meson energy, and are efficiency-corrected as a function of m(K) and m(D) in order to avoid dependence on the decay model. These results include the first observation of → DK, B → D*K, and → D*K decays and a significant improvement in the precision of the other channels compared to previous measurements. The helicity-angle distributions and the invariant mass distributions of the K systems are compatible with quasi-two-body decays via a resonant transition with spin-parity J = 1 for the K systems and J = 1 for the KK* systems. We also present measurements of the branching fractions of four → D, B → D decay channels with a precision compatible to the current world averages.[graphic not available: see fulltext
Measurement of the branching fractions of and decays at Belle II
No full textInternational audienceWe present measurements of the branching fractions of eight , decay channels. The results are based on data from SuperKEKB electron-positron collisions at the resonance collected with the Belle II detector, corresponding to an integrated luminosity of . The event yields are extracted from fits to the distributions of the difference between expected and observed meson energy, and are efficiency-corrected as a function of and in order to avoid dependence on the decay model. These results include the first observation of , , and decays and a significant improvement in the precision of the other channels compared to previous measurements. The helicity-angle distributions and the invariant mass distributions of the systems are compatible with quasi-two-body decays via a resonant transition with spin-parity for the systems and for the systems. We also present measurements of the branching fractions of four , decay channels with a precision compatible to the current world averages
The role of affective (mood) states in perceptions of quality, sacrifice and value
No full textThree studies investigated the way that mood affects judgments of commercial products. Participants who felt either happy or sad as a result of watching a movie or writing about a personal event, evaluated products based on different combinations of brand name (favorable vs. unfavorable), specific attribute descriptions (favorable vs. unfavorable) and price (high vs. low). An application of a weighted-average model of information integration proposed by Anderson (1981) permitted an assessment of the impact of mood on (a) the subjective weight, or importance, attached to each piece of information presented, (b) the scale value of this information (i.e., the interpretation of its implications), and (c) an initial impression of the product formed before its specific features were considered. Three sets of findings are noteworthy: (1) The weight attached to brand name in making judgments increased with the positive affect that participants experienced, whereas the weight attached to price appeared to decrease. This was particularly true of value and liking judgments. In addition, desirable brands were interpreted as more favorable, and undesirable brands as more unfavorable, when subjects were in positive moods than when they were not. (2) Mood-congruent information was weighted more heavily than mood-incongruent information. When attribute-descriptions of a product were presented along with brand name, they had less influence when the brand name accompanying it was mood-congruent. When price information was conveyed, however, greater attention to the mood-congruent brand name decreased the influence of price's implications for quality but not its implications for sacrifice. As a result, high price led to more negative value judgments and purchasing intentions when the brand information accompanying it was mood-congruent than when it was not. (3) Participants' initial impressions of both the quality of a product and the sacrifice required to purchase it were greater when they were in a positive mood than when they were not. However, because their first impressions of product's value reflected a trade-off between their perceptions of its quality and perceptions of the sacrifice required, these impressions were not affected by mood.Made available in DSpace on 2011-05-07T13:30:51Z (GMT). No. of bitstreams: 2
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Tax systems in transition
No full textHow have tax systems, whose primary role is to raise resources to finance public expenditures, evolved in the transition countries of Eastern Europe and the former Soviet Union? The authors find that: (1) the ratio of tax revenue-to-GDP decreased largely due to a fall in revenue from corporate income tax; (2) the fall in revenue from the corporate income tax led to a decline in the importance of income taxes, notwithstanding a rise in the share of individual income tax; (3) social security contributions together with payroll taxes became less important in the Commonwealth of Independent States; and (4) domestic indirect taxes gained in importancein overall tax revenues. Apart from the increased role of personal income taxation, these developments go in a direction opposite to those observed in poor countries as they get richer. They show a key aspect of transition, namely a movement from a system where the government exercised a preeminent claim on output and income before citizens had access to the remainder, to one with a greatly diminished role for the public sector, as reflected in a lower ratio of public expenditure to GDP, where the government needs to collect revenue in order to spend. Can expected levels of public expenditure be financed by the basic instruments of a modern tax system without creating significant distortions in the private sector? The authors suggest that transition countries, depending on their stage of development, should aim for a tax revenue-to-GDP ratio in the range of 22 to 31 percent, comprising value-added tax (6 to 7 percent), excises (2 to 3 percent), income tax (6 to 9 percent), social security contribution together with payroll tax (6 to 10 percent), and other taxes such as on trade and on property (2 percent). The authors'analysis also sheds light on the links between tax policy, tax administration, and the investment climate in transition countries.Municipal Financial Management,Environmental Economics&Policies,Banks&Banking Reform,Public Sector Economics&Finance,Economic Theory&Research,Environmental Economics&Policies,Public Sector Economics&Finance,Economic Theory&Research,Banks&Banking Reform,Municipal Financial Management
Impact of liberalisation on wages and employment in Indian manufacturing industries
No full textFDI and labour markets; Trade and labour markets; Technology and Labour markets; Indian labour markets; Wages and Employment; GMM
<b>Gum/Rubber</b>
No full text462-468Nat Prod Rad,
Vol. 5(6), Nov.-Dec. 2006, 462 Sanghi Rashmi, Bhattacharya Bani, Dixit Awantika
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