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91.
92.
Lakhera Shradha Rana Meenakshi Devlal Kamal Celik Ismail Yadav Rohitash 《Structural chemistry》2022,33(3):703-719
Structural Chemistry - Tridax procumbens is a flowering plant of the Asteraceae family with a wide range of medicinal uses like anti-inflammatory, anti-diabetic, anti-microbial, immunomodulatory,... 相似文献
93.
94.
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96.
Bianchi Type-III cosmological models for perfect fluid distribution with time dependent displacement field in the framework
of Lyra geometry are investigated. To get the deterministic model of the universe, we have assumed two conditions (i) shear
(σ) is proportional to the expansion (θ). This leads to B=C
n
where B and C are metric potentials and n is a constant. (ii) Universe is filled with barotropic fluid distribution which leads to p=γ
ρ, 0≤γ≤1, p being isotropic pressure and ρ the energy density. The physical and geometrical aspects of the model with a special case and singularities in the models
are also discussed. 相似文献
97.
J. Klusoň Kamal L. Panigrahi 《The European Physical Journal C - Particles and Fields》2011,71(3):1595
We continue our study of the Lorentz-breaking string theories. These theories are defined as string theory with modified Hamiltonian
constraint which breaks the Lorentz symmetry of target space-time. We analyze the properties of this theory in the target
space-time that possesses isometry along one direction. We also derive the T-duality rules for Lorentz-breaking string theories
and show that they are the same as that of Buscher’s T-duality for the relativistic strings. 相似文献
98.
99.
Mounir A. I. Salem Wafaa M. Abdou Tarik E. Ali Azza A. Kamal Reham F. Barghash 《Phosphorus, sulfur, and silicon and the related elements》2013,188(8):1007-1016
Abstract Fragmentation pathways of 14 organophosphorus compounds derived from diethyl spiro[pyrimidino[5,3][1,2]oxazole] phosphonates, diethyl (oxazolo[5,4-d]pyrimidine-4,6-dione)phosphonates, and diethyl (pyrimidino[4,5-b][1,4] oxazine)phosphonates were investigated by electron impact mass spectrometry (EI-MS). The intensity of the recorded molecular ion peaks showed various values depending on the nature of the compounds. Characteristic fragment ions were formed by successive loss of simple functional groups followed by decomposition of heterocycles connected to pyrimidine rings. 相似文献
100.
K. K. Vijaya Raj B. Narayana 《Phosphorus, sulfur, and silicon and the related elements》2013,188(9):1971-1981
A smooth one-step synthesis of 2-(2-bromo-5-methoxyphenyl)-5-(3-arylidene)-1,3-thiazolo[3,2-b]-1,2,4-triazol-6-(5H)-ones (4a–n) is described. The newly prepared compounds are characterized by analytical and IR, 1 H NMR, 13 C NMR, and FABMS spectral analysis. A few compounds are screened for anticonvulsant activity. Compounds 4i and 4n exhibit promising anticonvulsant activity and are recommended for further studies. 相似文献