Effect of Plasmon Resonance of Silver Nanoparticles on the Fluorescent Properties of Doxycycline

Journal of Analytical Chemistry - Silver nanoparticles modified with Eu3+ ions increase the intensity of the fluorescence signal by a factor of 125 in an analytical system containing doxycycline as...     

Synthesis and antitubercular activity of isoniazones of some aldehydes in the furan and thiophene series

8 Isoniazones of aldehydes of the furan and thiophene series are synthesized; in vitro they all exhibited high antitubercular activity. Two compounds, 5-ethylmercaptofurfural and 2-ethylmercapto-5-n-propyl-3-furanaldehyde isoniazones showed the greatest activity.     

Halo-heterocyclization of trans-5-phenyl-3-cinnamylsulfanyl[1,2,4]triazine into [1,3]thiazino[3,2-b][1,2,4]triazin-9-ium systems

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Effect of electron-ion bombardment on the growth of dielectric films in reactive sputtering

The mechanism by which electron — ion bombardment affects the growth of a silicon nitride film obtained by reactive sputtering in an apparatus based on a Penning discharge is investigated. The temperature and the degree of irradiation of the substrate are determined as functions of the distance from the substrate to the aperture in the anode. It is established that the presence or absence of bombardment leads to a difference in the formation of reactively sputtered silicon nitride films.Translated from Izvestiya Vysshikh Uchebnykh Zavedenii, Fizika, No. 12, pp. 11–15, December, 1976.The authors thank Yu. E. Kreindel' for his interest in the work and for useful discussions.     

Cerium influence on the thermal properties and structure of high-alkaline borosilicate glasses

Journal of Thermal Analysis and Calorimetry - The influence of cerium oxide on the thermal properties and the glass structure has been studied for the...     

Photoextraction of molecular gases from an organic polymer film

Photoextraction of various molecular gases from a polydimethylsiloxane (PDMS) polymer film has been studied. Change in the density of molecular gases has been measured as a function of the illumination duration, intensity and wavelength of light, and temperature of the coating. A linear dependence of the rate of photoextraction on the intensity of the incident light has been established. Similar to the photoelectric effect, photoextraction is absent in the long-wavelength spectral range down to 550 nm. The effect increases sharply in the short-wavelength spectral range below a threshold of about 550 nm. Photoextraction is absent at temperatures below the glass-transition temperature of PDMS (?125°C), at which, as is known, the bulk diffusion of molecular gases in the film is strongly suppressed. At long-term irradiation of the film, the number of photoextracted molecules decreases exponentially with time. This increase is accompanied by a long tail of a diffusion form. The results indicate that photoextraction has a nonthermal nature and demonstrate the important role of bulk diffusion in the process of light-induced extraction of molecules from the surface.     

Electrophysical properties of dielectric films in MDM-structures

Using the methods of reactive cathode sputtering in a low-voltage, penning-discharge installation, dielectric films from silica, silicon nitride, aluminum nitride, etc. are obtained. Parameters of the films in MDM structures, their optical properties and porosity are investigated as a function of the deposition rate, substrate temperature and reaction gas pressure. It is found out that the films from silicon nitride exhibit the highest dielectric strength and those from silicon dioxide show the least dielectric loss.     

1,4-benzodiazepines and their cyclic homdlogs and analogs

The transformations (acylation, condensation with aldehydes, and diazotization) of 7- and 3-amino-5-phenyl-1,2-dihydro-3H-1,4-benzodiazepin-2-ones are examined. It is shown that the action of P₂S₅ on 3-acetamidobenzodiazepinone leads to replacement of the oxygen atom of the acetyl group by a sulfur atom. The polarographic reduction of 7-arylideneamino-5-phenyl-1,2-dihydro-3H-1,4-benzodiazepin-2-ones was studied.See [8] for communication 29.Translated from Khimiya Geterotsiklicheskikh Soedinenii, No, 4, pp. 545–549, April, 1979.