We consider the fractional Burgers equation ut=Δα/2u+b⋅∇(u|u|(α−1)/β) on Rd, d≥2, with α∈(1,2) and β>1 prove existence of a solution for large class initial conditions, which contains functions that do not belong to any Lp(Rd), 1≤p≤∞. Next, we apply general results condition u0(x)=M|x|−β, 1<β<d, show selfsimilar derive its properties such as smoothness, two-sided estimates, asymptotics gradient...

Three new asterosaponins 1-3 and four known saponins 4-7 have been isolated from the starfish Asterias amurensis LÜTKEN. By means of high magnetic field 1D- and 2D-NMR ((1)H-(1)H correlation spectroscopy (COSY), total correlation spectroscopy (TOCSY), heteronuclear multiple quantum coherence (HMQC), heteronuclear single quantum coherence (HSQC), heteronuclear multiple bond correlation (HMBC), a...

this study aimed to determine phenolic compounds of artemisia spicigera (family asteraceae) growing in east-azarbaijan province of iran. 20%, 40 % and 60% spe fractions of methanolic extract of a. spicigera, were subjected to reversed phase preparative hplc, with the mobile phase consisted of methanol and water. structural identification of phytochemicals by spectroscopic methods including uv a...

During recent years, there was growing demand in using microalga valuable products such as β-carotene in health care. β-Carotene has anti-cancer and anti-aging properties for human. In Dunaliella salina cells, β-carotene has a major protecting role for biomolecules, when the production of reactive oxygen species elevated. In the present study, we investigated the influence of the four most effe...

Ficus natalensis subsp. leprieurii also known as the natal fig is a fruit-producing tree belonging to family Moraceae and widely distributed in African countries cultivated Egypt. F. common with myriad of traditional medicinal importance. Owing increased demand for natural products new structural compositions, current study aimed separate elucidate structure triterpenoid saponins from leaves. O...

The total synthesis of two natural phenolglycosides of the family Salicaceae, namely: populoside and 2-(β-d-glucopyranosyloxy)-5-hydroxy benzyl (3-methoxy-4-hydroxy) cinnamoate and nine not found yet in plants acyl derivatives of phenoglycosides: 2-(β-d-glucopyranosyloxy)-benzylcinnamoate, 2-(β-d-glucopyranosyloxy)-benzyl (4-hydroxy) benzoate, 2-(β-d-glucopyranosyloxy)-benzyl (3-methoxy-4-hydro...