Studying the synthesis of metal nanoparticles during the laser irradiation of targets in liquid media

The results from experiments on the laser irradiation of metallic targets of the copper group immersed in liquid are reported. Comparative studies of the formation of colloids during the laser irradiation of targets with varying (from moderate to ultrahigh) radiation intensities are conducted. The dependence of the size of obtained particles on laser irradiation conditions (pulse duration and radiation intensity) is revealed.     

Oligosaccharides ofSaponaria officinalis

Conclusions It has been found that the roots ofSaponaria officinalis L. contain three oligosaccharides.Two of them have been isolated: gentiobiose and the pentasaccharide saponarose. It has been shown that the latter is O--D-galactopyranosyl-(1 3)-O--D-galactopyranosyl-(1 3)-O--D-galactopyranosyl-(1 3)-O--D-galactopyranosyl-(1 1)--D-glucopyranoside.Khimiya Prirodnykh Soedinenii, Vol. 5, No. 6, pp. 469–473, 1969     

Triterpene glycosides of Dianthus deltoides. I

Summary FromDianthus deltoides L. we have isolated three new triterpene glycosides: dianthosides A, B, and C. It has been shown that dianthoside A is the 3-O--glucopyranoside and dianthoside B the 3-O-[O--D-glucopyranosyl-(1 6)--glucopyranoside] of gypsogenic acid. Some information on the structure of dianthoside C — a new glycoside of gypsogenin — has been obtained.A. E. Arbuzov Institute of Organic and Physical Chemistry, Academy of Sciences of the USSR. Translated from Khimiya Prirodnykh Soedinenii, No. 1, pp. 33–38, January, 1971.     

Oxidation of 3,5,3',5'-Tetra-tert-butyl-4,4'-dihydroxybiphenyl with Atmospheric Oxygen in the Absence of Base Catalysts

Use of dimethylformamide as solvent and preliminary addition of 3,5,3',5'-tetra-tert-butyl-4,4'-diphenoquinone allow oxidation of 3,5,3',5'-tetra-tert-butyl-4,4'-dihydroxybiphenyl with atmospheric oxygen to be efficiently performed in the absence of base catalysts.     

Glycosides ofPatrinia sibirica. II

Conclusions It has been established that two trisaccharide chains are present in sibiroside C, one combined with the 3-hydroxyl and the other with the 28-carboxyl of hederagenin.The first trisaccharide is -D-glucopyranoside-(1–4)--L-arabopyranosido-(1–4)--D-glucopyranose, while the second is D-glycopyranosido-(1–4)-D-glucopyranosido-(1–4)--L-arabopyranose.Khimiya Prirodnykh Soedinenii, Vol. 6, No. 1, pp. 64–69, 1970     

Solvolysis of 3,5-Di-tert-butyl-4-hydroxybenzyl Acetate in Alcohol Solutions

Solvolysis of 3,5-di-tert-butyl-4-hydroxybenzyl acetate in alcohol solutions involves intermediate formation of 2,6-di-tert-butyl-4-methylene-1-benzoquinone that further takes up a molecule of the alcohol.     

Glycosides ofPatrinia sibirica. I

Conclusions Three glycosides, named sibirosides A, B, and C, have been detected in the roots ofPatrinia sibirica (L.) Juss. All three are derivatives of hederagenin. Sibirosides A and C were isolated in the pure state and the complete structure of the former was established. It was shown that sibiroside C is a hexaoside of hederagenin, with carbohydrate chains consisting of two L-arabinose and four D-glucose residues.Khimiya Prirodnykh Soedinenii, Vol. 6, No. 1, pp. 60–64, 1970