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排序方式: 共有880条查询结果,搜索用时 250 毫秒
1.
Abulyazied Dalia E. Alturki Asma M. Youness Rasha A. Abomostafa H. M. 《Journal of Inorganic and Organometallic Polymers and Materials》2021,31(10):4077-4092
Journal of Inorganic and Organometallic Polymers and Materials - In this work, a borosilicate glass sample (5SiO2–45B2O3–20Na2O–25CaO–5Ag2O) was added to nano-sized... 相似文献
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Mohamad A.A. Attia Roberto Orrù Francesco Delogu Selena Montinaro Sebastiano Garroni Emad M.M. Ewais Giacomo Cao 《Journal of the American Ceramic Society》2015,98(5):1453-1459
The effects produced by annealing Y2O3 nanopowders on their spark plasma sintering (SPS) behavior are systematically investigated in this work. It is found that the annealed powders display higher sinterability with respect to the as‐received ones. Indeed, the maximum densification level reached from pristine powders is about 97.5%, whereas density decreases when further increasing either the sintering temperature or the dwell time. In contrast, the density of SPS products obtained from pretreated powder monotonically increases with temperature and processing time, thus leading to fully dense materials in 30 min at 1050°C and 60 MPa. Correspondingly, it is found that the annealing treatment markedly inhibits grain coarsening during SPS. Thus, dense translucent samples with grain size below 100 nm can be attained from annealed powders. On the other hand, white‐opaque specimens with significantly coarser microstructures (up to 1‐μm‐sized grains) are obtained when pristine powders are directly processed under the same sintering conditions. Furthermore, it is observed that the annealing treatment of SPS samples in air allows for graphite contamination removal, whereas no improvement in term of light transmittance is produced. 相似文献
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Microsystem Technologies - The purpose of the present enquiry is to analyse the mechanics of an incompressible fluid, with water as base fluid, through a radially symmetric plumb duct with... 相似文献
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Khalid Tauqeer Khan Abdul Nasir Ali Mazhar Adeel Adil ur Rehman Khan Atta Shuja Junaid 《Multimedia Tools and Applications》2019,78(17):24595-24615
Multimedia Tools and Applications - The world is facing many problems including that of traffic congestion. To highlight the issue of traffic congestion worldwide specially in urban areas and to... 相似文献
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The effect of FEF carbon black as filler on the thermal capacity c, diffusivity a, and thermal conductivity λ, of styrene butadiene rubber (SBR) composites in the temperature range 300–420 K was studied. The filler strongly increases the thermal diffusivity, whilst strongly decreasing the thermal capacity and the thermal conductivity (except at high FEF content ≥80 phr). The influence of the filler on the thermoelastic behaviour of the same composites was also investigated. It was found that the thermoelastic temperature change (ΔT) increased with carbon black concentration as well as the entropy change per unit extension. 相似文献
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Herbert Wieser Hans-Dieter Belitz Dalia Idar Azaria Ashkenazi 《Zeitschrift für Lebensmitteluntersuchung und -Forschung A》1986,182(2):115-117
Summary The coeliac active peptide B 3142, which has been isolated from a peptic-tryptic digest of gliadin [1] and which consists of 53 amino-acid sequences [2], was partially hydrolyzed with -chymotrypsin. The two fragment peptides CT-1 (positions 1–22 of B 3142) and CT-2 (positions 23–53) were separated by high-performance liquid chromatography on octadecyl silica gel and purified by gel filtration on Biogel P2. The examination in the organ-culture test including 18 coeliac patients on normal diet and 7 control persons have shown that the toxicity is preserved after the chymotryptic treatment and that the peptides B 3142, CT-1 and CT-2 do not significantly differ from one another according to their coeliac-specific effect.
Supported by a grant from Deutsche Forschungsgemeinschaft. We gratefully acknowledge the excellent assistance given by Mrs. U. Schützler and Ms. B. Mosler 相似文献
Coeliakieaktivitat der Gliadinpeptide CT-1 und CT-2
Zusammenfassung Das coeliakieaktive Peptid B 3142, das aus einem peptisch-tryptischen Partialhydrolysat von Gliadin gewonnen wurde [1] und aus einer Sequenz von 53 Aminosäureresten besteht [2], wurde mit -Chymotrypsin partiell hydrolysiert. Die beiden Fragment-peptide CT-1 (Positionen 1–22 von B 3142) und CT-2 (Positionen 23–53) wurden durch Hochdruckflüssig-keitschromatographie an Octadecyl-Kieselgel aufgetrennt und an Biogel P2 gereinigt. Die Prüfung im Organkultur-Test unter Einbeziehung von 18 Coeliakie-patienten unter Normalkost und von 7 Kontrollpersonen zeigte, daß die Toxizität nach chymotryptischer Spaltung erhalten bleibt, und daß sich die Peptide B 3142, CT-1 und CT-2 in ihrer coeliakiespezifischen Wirkung nicht wesentlich unterscheiden.
Supported by a grant from Deutsche Forschungsgemeinschaft. We gratefully acknowledge the excellent assistance given by Mrs. U. Schützler and Ms. B. Mosler 相似文献
10.
Rizwana Begum Syed Nabi Rupesh Tayade Adil Hussain Arjun Adhikari In-Jung Lee Gary J. Loake Byung-Wook Yun 《International journal of molecular sciences》2021,22(10)
In the last two decades, global environmental change has increased abiotic stress on plants and severely affected crops. For example, drought stress is a serious abiotic stress that rapidly and substantially alters the morphological, physiological, and molecular responses of plants. In Arabidopsis, several drought-responsive genes have been identified; however, the underlying molecular mechanism of drought tolerance in plants remains largely unclear. Here, we report that the “domain of unknown function” novel gene DUF569 (AT1G69890) positively regulates drought stress in Arabidopsis. The Arabidopsis loss-of-function mutant atduf569 showed significant sensitivity to drought stress, i.e., severe wilting at the rosette-leaf stage after water was withheld for 3 days. Importantly, the mutant plant did not recover after rewatering, unlike wild-type (WT) plants. In addition, atduf569 plants showed significantly lower abscisic acid accumulation under optimal and drought-stress conditions, as well as significantly higher electrolyte leakage when compared with WT Col-0 plants. Spectrophotometric analyses also indicated a significantly lower accumulation of polyphenols, flavonoids, carotenoids, and chlorophylls in atduf569 mutant plants. Overall, our results suggest that novel DUF569 is a positive regulator of the response to drought in Arabidopsis. 相似文献