JournalJournal "Scientific Israel- Technological Advantages" Vol.15 , 2013

Journal "Scientific Israel- Technological Advantages" Vol.15 no. 1, 2013

RADIATION REFLECTION AND ABSORPTION OF MATERIALS BASED ON POLYVINYL ALCOHOL HYDROGELS

L. Pinchuk-1, V. Goldade-2, V.Kestelman-3

1-A. Belyi Metal-Polymer Research Institute, Gomel, Belarus, 2-Francisk Skorina Gomel State University, Gomel, Belarus, 3- KVN International, King of Prussia, PA , USA , mpri-otdel8@mail.ru; victor.goldade@gmail.com; kvnint@verizon.net; kvnint@gmail.com

ABSTRACT

Regularities of reflection and absorption of microwave radiation by water during its freezing-thawing have been experimentally established. Characteristics of microwave energy attenuation by polyvinyl alcohol hydrogels, as well as changes of named parameters due to structure transformation induced by conversion of hydrogels into cryogels at subzero treatment, are given. Facilities of the decrease of cryogels radio-transparency by modifying them with water solutions of ferroelectrics have been shown.

 

HIGH POWER OPTICS AND ITS NEW MANIFESTATIONS

V. Apollonov

Prokhorov General Physics Institute of RAS, Moscow, Russia., vapollo@kapella.gpi.ru

The paper is devoted to the memory of A. M. Prokhorov and A. H. Guenther

ABSTRACT

The advent of the laser has placed stringent requirements on the fabrication, performance and quality of optical elements employed within systems for most practical applications. Their high power performance is generally governed by three distinct steps, firstly the absorption of incident optical radiation (governed primarily by various absorption mechanisms); secondly, followed by a temperature increase and response governed primarily by thermal properties and finally the elements thermo-optical and thermomechanical response, e.g., distortion, stress birefringenous fracture, etc. All of which needs to be understood in the design of efficient, compact, reliable and useful for many applications high power systems, under a variety of operating conditions, pulsed, continuous wave, rep-rated or burst mode of varying duty cycles.

 

HIGH REPETITION RATE P-P LASERS FOR SPACE DEBRIS ELIMINATION

V. Apollonov

Prokhorov General Physics Institute RAS, Moscow, Russia, vapollo@kapella.gpi.ru

ABSTRACT

Studies show that the number of debris in Low Earth Orbit is exponentially growing despite future debris release mitigation measures considered. Especially, the already existing population of small and medium debris is today a concrete threat to operational satellites. Ground based DF-laser solution which can remove at low expense and in a non-destructive way hazardous debris around selected space assets appears as one highly promising answer.

 

Journal "Scientific Israel- Technological Advantages" Vol.15 no. 2, 2013

HIGH POWER DISK LASERS: ADVANTAGES AND PROSPECTS

V. V. Apollonov

Prokhorov General physics Institute RAS, Moscow, Russia, vapollo@kapella.gpi.ru

ABSTRACT

A number of advantages of high-frequency pulse-periodic lasers emitting short pulses, as applied to a wide range of industrial technologies, is the basis of many modern concepts of disk lasers. High-intensity light with an insignificant thermal lens effect in the central high-loaded zone of the active medium have led to the lifting of restrictions on the brightness of the pump diode. This has reduced the cost of laser sources, and thus has significantly improved the efficiency of electro-optical conversion, especially in the regime of high average power. Creation of megawatt high-frequency pulse-periodic lasers with a large cross section of the active medium opens up great prospects for their use in solving the problems of launching of small satellites with lasers, formation of super-long conducting channels in space and atmosphere, cleaning of the near-Earth space from the space debris.

 

PHYSICS OF GAS AND WATER FLOWS IN PLANTS: SUPERFLUIDITY OF GROUND WATER IN XYLEM CAPILLARIES

G.Khodakov

"Khodakov's Company" LLC, Moscow,Russian Federation, khodakov@yahoo.com

ABSTRACT

To complete the process of photosynthesis of organic compounds in plants, ground water, carbon dioxide and hydrogen should be used. Mechanisms of ground water supply of the plants and receipt of hydrogen out of it, that is necessary for photosynthesis of organic matter, as well as the problem of extracting the carbon dioxide from the air, has long attracted the attention of scientists. However, to solve these problems based on the known laws of physics was not possible. The application of the solutions "superfluidity" phenomenon, that was observed by us, in the electrically charged capillaries and associated effects to plant life processes can solve these problems. The mandatory conditions of the appearance of "superfluidity" are observed in plants: inner surface of the xylem capillaries is electrically charged (as in electret tubes); the groundwater is a solution of humus acids and salts.

 

SUPERFLUIDITY OF AQUEOUS SOLUTIONS IN CAPILLARIES

G. Khodakov, N. Redkina

"Khodakov's Company" LLC, Moscow,Russian Federation, khodakov@yahoo.com

ABSTRACT

Abnormal superfluidity of aqueous solutions in capillaries of porous bodies (in membranes made ​​of ground powders) has been found. The phenomenon has been caused by electrically charged and chemically active surfaces of capillaries which pierce through layer membranes made of mechanically active powders. The solution value of viscosity calculated by the measured speed of filtration and geometrical parameters of capillaries in layers of membranes appeared to be 2-5 times less than the value of viscosity of water.

 

GREEN NANO-PROTECTIVE COATING

M. Ioelovich , O. Figovsky

Polymate Ltd.- International Nanotechnology Center , Migdal HaEmek, Israel, bd895892@zahav.net.il

ABSTRACT

A green zero-discharge technology for preparation of nano-compositions aimed for protective coating of hydrophilic biodegradable packaging materials was described in this paper. The technology comprises the following steps: (1) hydrolyzing of cellulose raw-material with acidic catalyst in the presence of process additive at a low catalyst/cellulose ratio; (2) introducing special precipitators into the obtained acidic slurry of nano-cellulose in a manner that pH-value of the slurry achieves 6-7 and inorganic nano-particles are precipitated into nano-cellulose containing slurry; (3) admixing the slurry containing agglomerates of the nano-particles with a solution containing hydrophobic biodegradable polymers and some other additives soluble in organic solvents; and (4) mechanical disintegration of the prepared mixture in high-pressure homogenizer to break out the agglomerates of nano-particles and obtain a uniform nano-composition having an average particle size of 100-300 nm. The proposed coating nano-composition imparts to natural packaging materials an increased strength and effective barrier against water and grease without change in biodegradability properties of the coated materials.

 

Journal "Scientific Israel- Technological Advantages" Vol.15 no. 3, 2013

THE STRUCTURE AND DIFFRACTION BY NANOTUBES

D. Pashin-1, O. Figovsky-2, Z. Khalitov-1

1-"AddNano" LLC, Kazan, Russia, 2- Polymate Ltd., International Nanotechnology Research Center, Migdal HaEmek, Israel, pashin@addnano.ru

ABSTRACT

The method of description of structures of non-chiral, chiral and scroll nanotubes of arbitrary chemical composition is developed by transformation of plane analogue's atom coordinates to cylindrical coordinates on the corresponding surface. The description uses such concepts as cylindrical lattice, Bravais cell and chiral indexes, expressed in terms of these cells. The quantitative theory diffraction is developed, the pseudoorthogonality effect, earlier investigated experimentally, is considered. The effect is associated with additional scattering by atom circles of nanotube and has not analogues in diffraction by usual crystals. The models of lattices and theory diffraction by goffered nanotubes (cylindrical superlattices) and radial cylindrical crystals formed at sorption of atoms on a cylindrical substrate are proposed. The diffraction of short-wave radiation (x-ray, particle with corresponding energies) in an internal hole of circular lattice is considered, the effect of concentration of radiation on the nanotube's axis is shown. The developed results associate with waveguide effect having, as against traditional, the diffraction nature.

 

CORROSION INHIBITORS PATENTS IN INDUSTRIAL APPLICATIONS. Review

R.Garcia Inzunza, B.Valdez Salas, M.Schorr Wiener.

Institute of Engineering, University of Baja California, Mexicali, Mexico, mschorr2000@yahoo.com

ABSTRACT

Corrosion affects the quality of the environment, the durability of the infrastructure assets and industrial equipment. Therefore, it is crucial to apply corrosion engineering control methods and techniques, in particular safe green corrosion inhibitors that will extend the life of the infrastructure saving large expenses in materials equipment and structures. This review presents an analysis of patents on corrosion inhibitors developed for aqueous systems, steel reinforced concrete, acid pickling operations, oil industry and additives in the formulation of protection coatings.

 

Journal "Scientific Israel- Technological Advantages", Vol.15 no. 4, 2013

STUDY OF FIBER REINFORCED RUBBER CONCRETE STRUCTURAL ELEMENTS IN BENDING

Yu.M. Borisov, , A.E. Polikutin, Nguen Fan Zuy

Voronezh State University of Architecture and Civil Engineering, Voronezh, Russia, vestnik_vgasu@mail.ru, panfilov_dv@vgasu.vrn.ru

ABSTRACT

The goal of these studies was to investigate strength and crack-resistance of normal cross-sections as well as deformability of bending elements of building structures made of concrete based on vulcanized polybutadiene binder (RubCon), reinforced with conventional longitudinal rods and introduced steel fiber.

 

APPLICATION OF DIGITAL COLORIMETRY CHEMICAL ANALYSIS OF BUILDING MASTERIALS

O.B. Rudakov , E.A. Khorokhordina

Voronezh State University of Architecture and Civil Engineering, Voronezh, Russia, robi57@mail.ru

ABSTRACT

The opportunities of digital colorimetry in control of phenols in building materials using color tests are considered.

 

EARTHQUAKE RESISTANT OF CONCRETE REINFORCED RESIDENCE BUILDING: ESTIMATION OF GEOMETRIC PARAMETERS

D.Beilin

Polymate Ltd.-International Nanotechnology Research Center, Migdal Ha-Emek, Israel, sitapolymate@gmail.com

ABSTRACT

The practical method for estimation of seismic resistance of reinforced concrete dwelling house at the stage of its architectural designing is proposed. The method is based on Israeli Standard no. 413 (Design Provisions for Earthquake Resistance of Structures, SI 413, 1995)