排序方式: 共有13条查询结果,搜索用时 296 毫秒
1.
2.
3.
We have presented a theoretical study of the dust acoustic(DA) shock structures in a magnetized,electron depleted dusty plasma in the presence of two temperature superthermal ions. By deriving a Korteweg–de Vries–Burgers equation and studying its shock solution, we aim to highlight the effects of magnetic field and obliqueness on various properties of the DA shock structures in the presence of kappa-distributed two temperature ion population. The present model is motivated by the observations of Geotail spacecraft in the Earth?s magnetotail and it is seen that the different physical parameters such as superthermality of the cold and hot ions, the cold to hot ion temperature ratio, the magnetic field strength, obliqueness and the dust kinematic viscosity greatly influence the dynamics of the shock structures so formed. The results suggest that the variation of superthermalities of the cold and hot ions have contrasting effects on both positive and negative polarity shock structures.Moreover, it is noted that the presence of the ambient magnetic field affects the dispersive properties of the medium and tends to make the shock structures less wide and more abrupt. The findings of present investigation may be useful in understanding the dynamics of shock waves in dusty plasma environments containing two temperature ions where the electrons are significantly depleted. 相似文献
4.
In this paper,a graphene-coated surface plasmon resonance sensor is designed for the examination of Rodent urine which is responsible for Leptospirosis bacteria... 相似文献
5.
6.
7.
VEENA SAINI 《Journal of food science》1968,33(2):136-138
SUMMARY— Corn starch in the form of raw granules at commercial moisture was irradiated at two levels: 3 × 105 and 6 × 106 rad from a Co60 source. The irradiated samples were completely dissolved in alkali, indicating there was no cross linking induced in the starch molecules by irradiation. Viscosity determinations of starch solution diluted with distilled water exhibited the ion charge effect generally observed in other macromolecules.
The Staudinger indices of unirradiated, irradiated at 3 × 106 rad and 6 × 106 rad were 42, 22 and 16 respectively, which were an indication of depolymerization of starch macromolecules with increasing irradiation. The differential thermal analysis of the three samples also showed the depolymerization of the polymer with irradiation.
It is suggested that these two simple techniques–the Staudinger index and D.T.A.–could be usefully employed to characterize small differences in starches. 相似文献
The Staudinger indices of unirradiated, irradiated at 3 × 10
It is suggested that these two simple techniques–the Staudinger index and D.T.A.–could be usefully employed to characterize small differences in starches. 相似文献
8.
MICHELE DI COSOLA STEFANIA CANTORE MARIO GIOSUÈ BALZANELLI CIRO GARGIULO ISACCO KIEU CAO DIEM NGUYEN RAJIV SAINI ANNARITA MALCANGI MARGHERITA TUMEDEI MARIATERESA AMBROSINO ANTONIO MANCINI SALVATORE SCACCO RICCARDO NOCINI LUIGI SANTACROCE REA BALLINI EDOARDO BRAUNER 《Biocell》2022,46(4):923-929
The human teeth and oral cavity harbor various populations of mesenchymal stem cells (MSCs), so called
dental-derived stem cells (D-dSCs) with self-renewing and multilineage differentiation capabilities. D-dSCs properties
involves a strong paracrine component resulting from the high levels of bioactive molecules they secrete in response
to the local microenvironment. Altogether, this viewpoint develops a general picture of current innovative strategies
to employ D-dSCs combined with biomaterials and bioactive factors for regenerative medicine purposes, and offers
information regarding the available scientific data and possible applications. 相似文献
9.
10.
Accelerated ripened Cheddar cheese was prepared by blending two parts of shredded curd made from standardized cow's milk with one part of 5.2% NaCl solution and ripening at 30°C for 8 days. On a dry matter basis, protein and fat of accelerated ripened cheese were similar to that of conventionally ripened Cheddar cheese, while lactose and total ash were greater. Similar observation was made for processed cheese samples. No change in vitamin A or in riboflavin but a fourfold increase in folic acid was observed during accelerated ripening. Protein efficiency ratio, net protein utilization and digestibility coefficient by rat tests were slightly but significantly higher for conventionally ripened processed cheese. However, no difference in biological value was observed. 相似文献