bluuebunny/crossref_metadata_2025 huggingface dataset:
Advantages of Thorium Nuclear Fuel for Thermal-Neutron Reactors
Authors: Shamanin Igor , Bedenko Sergey , Gubaydulin Ildar
Published: January 2015

The explanation of the effects which were found earlier in numerical simulation of parameters of open thorium-plutonium nuclear fuel cycle has been offered. Scientific and technical solutions allow considering the possibility of including thorium-232 in the fuel of nuclear reactors, which are based on existing design solutions, and beginning to design of new generation materials: a new generation of fuel rods and fuel assemblies, where the isotope uranium-238 will be completely replaced with thorium-232.
Determining Reactor Graphite Lifespan from Thermal Properties Degradation
Authors: Baybakov Denis , Naymushin Artem , Nesterov Vladimir , Savanuk Sevastyan , Shamanin Igor
Published: January 2015

This work assesses real graphite lifespan distribution of pressurized-tube reactors (RBMK) with graphite moderator. The changes in heat exchange and heat transfer conditions were taken into consideration, which changes are induced by the thermal properties’ degradation and the changes in the form of structural elements. Besides, some features associated with the differences in the neutron flux spectrum and differences in characteristics of gamma radiation field in the fuel and in the channels of control and protection system (CPS) were all taken into account.
Influence of Carbon Pulse Ion Beam on Titanium Alloy
Authors: Beloglazova Polina A. , Chernov Ivan P. , Cherdantsev Yuriy P. , Pushilina Natalia
Published: January 2015

We have researched the influence of the carbon pulse ion beam on samples of technical titanium VT1-0. The beam energy was 200 kV; the pulse duration, 80 ns; the energy density, 1.92 J/cm2. It was established that the 1.8 µm deep modified layer with high hardness and low rate of hydrogen sorption in the bulk of material was formed during the exposure to the carbon pulse ion beam.
Reactor Model for Plasma Utilization of Dispersed Water-Organic Compositions Based on a Closed Nuclear Fuel Cycle Inflammable Wastes
Authors: Karengin Alexander G. , Karengin Alexey A. , Novoselov Ivan Yu. , Tundeshev Nikolay V.
Published: January 2015

The calculation results of the operating modes of a plasma reactor for utilizing model water-organic compositions based on a closed nuclear fuel cycle’s inflammable wastes in air plasma are shown. Program complex ANSYS Fluent 6.3 with broad data base of gaseous, liquid and solid materials for calculation of different physical and chemical processes was used.
X-Ray Absorption Coefficient Behavior Depending on Disposition of Diffraction Vector and Temperature Gradient Vector
Authors: Hayrapetyan Karlen , Noreyan Serob , Margaryan Vardan , Kocharyan Vahan
Published: January 2015

The behavior of the interference absorption coefficient of X-rays in Laue geometry depending upon the disposition of diffraction vector and temperature gradient vector in the perpendicular direction to the reflecting atomic planes family was experimentally studied. The study was carried out for the different thicknesses of quartz single crystal for atomic planes. It was shown that in the case of anti-parallel disposition of the diffraction vector and temperature gradient vector the absorption coefficient of X-rays sharply decreases with the increase of temperature gradient and in the case of the parallel disposition of the diffraction vector and the temperature gradient vector the absorption coefficient firstly increases and then decreases. The theoretical calculation corresponding to the experiment conditions have been done. The physical explanation of the obtained experimental results has been made. The obtained results are in good correspondence with the experiment.
Application of NANOcolloid Materials Labeled by Radionuclides in Medicine
Authors: Skuridin Viktor S. , Stasyuk Elena S. , Rogov Alexander S. , Sadkin Vladimir L. , Varlamova Natalya V. , Nesterov Evgeny A.
Published: January 2015

The paper considers properties of nano-sized particles and methods of well-known technetium-99m-based nanocolloid materials preparation. We present a production technique of Al2O3-based nanocolloid labeled with technetium-99m developed at the Institute of Physics and Technology of TPU. We also give the results of preliminary medico-biological testing of 99mТс (IV)-Al2O3 pharmaceutical on animals for determining its operational suitability for scintigraphic visualization of lymphatic nodes.
Development of the Binary Technologies for Radiation Therapy of Malignant Tumors – Current State and Problems
Authors: Sheino Igor N. , Khokhlov Vyacheslav F. , Izhevskiy Pavel V.
Published: January 2015

The study analyses the current status and prospects of development of new radiation therapy methods, such as neutron capture therapy (NCT) and photon capture therapy (PCT), based on elements having high interaction cross section with radiations, to identify the benefits in their clinical application. One of the problems of NCT is the lack (or unavailability) of neutron sources with required intensity and spectrum. National Research Tomsk Polytechnic University has an opportunity of carrying out clinical studies, due to the presence of operating research nuclear reactor. However, the development of the medical neutron channel at this reactor is extremely challenging.
Diagnostic Efficiency of Single-Photon Emission Computed Tomography with 99MTc-MIBI in Visualization of Malignant Tumors of the Larynx and Laryngopharynx
Authors: Zelchan Roman , Chernov Vladimir , Titskaya Anna , Sinilkin Ivan , Chizhevskaya Svetlana , Choynzonov Yevgeniy Ts.
Published: January 2015

To study the diagnostic efficiency of single-photon emission computed tomography (SPECT) with 99mTc-MIBI 40 patients were chosen for diagnosing primary and recurrence of laryngeal or laryngopharyngeal cancer and as well as patients with benign diseases of the larynx. All patients underwent SPECT with 99mTc-MIBI. As a result it has been found that the sensitivity, specificity and accuracy of SPECT with 99mTc-MIBI in the diagnostics of primary tumors of the larynx are 95%, 80% and 92%, respectively. The visualization of recurrent tumors of the larynx and laryngopharynx has showed 100% sensitivity. The obtained results have proved the consistency of SPECT with 99mTc-MIBI as an additional method of diagnostics of laryngeal and laryngopharyngeal cancer.
Dynamic Renoscintigraphy with 99mTc-DTPA in the Evaluation of Renal Function in Patients with Chronic Heart Failure
Authors: Vesnina Zhaneta V. , Lishmanov Yuri B.
Published: January 2015

The article is devoted to the possibilities of dynamic renoscintigraphy with radiopharmaceutical 99mTc-DTPA labelled with sodium pertechnetate extraction that is produced at Tomsk Polytechnic University for the diagnostics, assessment of the severity and the nature of renal functional disorders in patients with coronary heart disease complicated by chronic heart failure.
Investigation of ZrO2 and TiO2 Coatings Influence on Hydrogen Sorption Behavior by Zirconium Alloy Zr1%Nb at Saturation from Gas Atmosphere
Authors: Chernov Ivan P. , Pushilina Natalia S. , Kudiiarov Viktor N. , Berezneeva Ekaterina V. , Nikolaeva Aleksandra N. , Krysina Olga
Published: January 2015

Hydrogen sorption, structural phase state and mechanical properties after hydrogenation of zirconium alloy Zr1%Nb with ZrO2 and TiO2 coatings were investigated. It has been established that ZrO2 coating reduces the rate of hydrogen sorption by zirconium alloy Zr1%Nb in comparison with the initial material at hydrogen saturation temperature 450 °С.
Immediate and late Clinical Outcomes in Patients with Head and Neck Cancer Treated at the Ural Neutron Center
Authors: Kuznetsovа Anna , Vazhenin Andrey , Golykov Oleg , Kandakova Elena , Munasipov Zinnur , Vazhenin Ilia , Bobkova Gulnara
Published: January 2015

The paper presents the analysis of the results of combined photon-neutron therapy (CPNT) in patients with malignant tumors of head and neck (H&N) inChelyabinsk region clinical oncological dispensary. In the basic group of patients with tumors of a throat the survival rate without relapses (SRWR) was 65 %, that is 30 % higher than in control group - 35 %. The general survival rate (GSR) was accordingly - 76 % and 66 % (р <0.005). In the basic and control group of patients with tumors of salivary gland WR the general survival rate was accordingly - 40 % and 14 % (p> 0.05). At tumors of the pharynx three - year WR after course of CPNT was 18.3 % higher (р=0.002) than in group thet underwent photon therapy. GSR was accordingly 46 % and 20 %. At tumors of oral cavity the CPNT increases survival rate without relapses at 11.5% and GSR at 17 %, in comparison with photon therapy (р <0.005). WR at tumors of nasopharynxes after CPNT was 62 %, and in control group 60 %. (р=0.05). When the size of tumor was T1 the GSR in basic group was 81 %, T2 - GSR was 62 %, and T3 - GSR was 70 %; In the control group accordingly was 52 %, 56 %, 35 %. CPNT in the program of radical course of PT increases a median of full tumor resorptions up to 84.52 % in the basic group, in control accordingly – 46.7 %. CPNT increases SRWR and GSR. The most meaningful difference in results of treatment according to SRWR and GSR was observed in patients with the size of primary tumor T3. Increase of SRWR and GSR was in groups at patients with tumors of a throat, salivary gland, pharynx where average tumor depth was up to 3.7- 4.5 cm.
Non-Invasive Tissue Injury Monitoring Using Bioimpedance Spectroscopy
Authors: Aleinik Aleksandr N. , Turgunova Natalya D. , Velikaya Victoria V. , Musabaeva Ludmila I. , Startseva Zhanna A. , Mukhamedov Marat R.
Published: January 2015

An understanding of normal tissue response is necessary for the optimization of radiation treatment in cancer therapy. Cancer cells exhibit altered local dielectric properties compared to normal cells because of the difference in shape, size and orientation. These properties are measurable as a difference in electrical conductance using electrical impedance spectroscopy. Multiple frequency bioimpedance analysis is used to measure change in electrical properties of the irradiated tissues as a function of frequency and time. From the experimental results, it is clear that the electrical properties demonstrated good detection performance. The electrical parameters of the tissues could be used to distinguish the tissue's status. Changes in electrical properties at different frequencies show, that there are differences between conductivity of non-irradiated and irradiated tissues.
Laws of Radiation Grafting of Styrene to PVDF Films and Characterization of the Grafted Polymer
Authors: Sokhoreva Valentina , Golovkov Vladimir , Dubrova Natalya A. , Sidko Dmitry
Published: January 2015

The experimental study of the kinetics of styrene monomer accumulation in polyvinylidene fluoride films with radiation-chemical grafting of styrene monomer is presented. It is proved that the degree of grafting depends on the absorbed dose of helium ions, temperature and composition of the grafting solution.
Possibility of Using 99mTc-Labeled Macro-Aggregates of Serum Albumin and Diethylene Triamine Pentaacetic Acid in the Assessment Lung Ventilation and Perfusion in Patients with Chronic Obstructive Pulmonary Disease and Coronary Artery Disease
Authors: Krivonogov Nikolay G. , Ageeva Tatjana S. , Mishustin Sergej P. , Zavadovsky Konstantin V. , Saushkin Viktor V. , Lishmanov Yuri B.
Published: January 2015

Basic scintigraphy data reflecting into lung microcirculation and ventilation were studied at 12 patients with chronic obstructive pulmonary disease (COPD) of I-II degree against the background of coronary artery disease (CAD). The bilateral increase in an apical-basal gradient of perfusion that signaled about redistribution of a pulmonary blood-groove in the top parts of lungs and development of pulmonary hypertension and also slowing-down of alveolar-capillary permeability (ACP) was revealed. The revealed violations indicate more expressed changes of pulmonary microcirculation and ventilation at patients with COPD in combination with CAD and promote timely pharmacotherapy correction of the specified combined disease. Pulmonary ventilation/perfusion scintigraphy with 99mТc-labeled macro-aggregates of serum albumin (MAA) and diethylene triamine pentaacetic acid (DTPA) acid have all necessary properties for receiving high-quality lung scan.
Possibility of Using Nuclear Track Membrane for Ophthalmology
Authors: Bosykh Ekaterina , Pichugin Vladimir , Sokhoreva Valentina
Published: January 2015

This work is devoted to study the possibility of using a nuclear track membrane for ophthalmology in epithelial-endothelial corneal dystrophy treatment. Experiments were conducted using the track membrane “TOMTREK” based on polyethylenterephthalate (PET) with pores diameters (0.2-0.8)micron and (5x106-2x109) pores/cm2 density. The pores were formed by irradiating the polymer PET 40Ar+8 ions with energy 41.5 MeV. After irradiation, the membrane was chemically treated in the alkaline solution. Imparting hydrorhilicity membrane was the next step. Contact angle of the wettability the surface track membrane was measured just after the chemical treatment in NaOH and after 10 hours in air. The surface had been processed by the plasma self-sustained volume discharge to give the surface the hydrorhilic properties of the membrane. The maximum voltage on plasma discharge was 20-22 kV. The energy density in the discharge was 6·10-4 J/cm2 per pulse. Pulse repetition rate was 103 s-1. Samples of 6x6 cm were attached in a special rotating device. Thus, the effects were both surfaces of the membrane. After surface treatment, TM samples were placed in plastic bags. After a night contact angle of wetting was measured with these samples. Disks treating by the plasma were cut. The disk’s diameter was 6-8 cm. The edges of the disks were incised and processed with hot temperature in order to obtain the model of an appropriate shape. It was a shape of a truncated sphere with a certain radius of curvature. Then, the membrane was sterilized and implanted into the anterior chamber of the pig’s eye. Thus, we tested the methods of barrier keratoplasty using the nuclear track membrane.
Prevention and Treatment of Local Breast Cancer Recurrence Using 6.3 MeV Fast Neutrons
Authors: Velikaya Viktoria , Musabaeva Ludmila , Lisin Valerij , Startseva Zhanna
Published: January 2015

The study included 138 breast cancer patients, who received the complex treatment and radiotherapy alone with the use of 6.3 MeV fast neutrons generated within U-120 cyclotron. Neutron therapy used for the prevention of local recurrence was shown to be effective in multimodality treatment of patients with locally advanced breast cancer, and in cases with locally advanced tumor recurrences it is often the only treatment to prolong life of breast cancer patients.
Use of Pulse Oximetry in Radiotherapy
Authors: Martemyanova Nina I. , Turgunova Natalia D. , Aleinik Aleksandr N.
Published: January 2015

Reflectance pulse oximeter is designed to determine arterial blood oxygen saturation during a radiation therapy. Proposed solutions promote to reduce the impact of sensor motion on the readings. Experimentally obtained optimal contact pressure of the sensor on the body is 0.7 N. The preliminary results show that the device has good resolution and high reliability.
Use of Single Photon Emission Computed Tomography (SPECT) with 99mTc-MIBI for Evaluation of Neoadjuvant Chemotherapy Effectiveness of Larynx and Laryngopharynx Cancer Treatment
Authors: Zelchan Roman , Chernov Vladimir , Titskaya Anna , Sinilkin Ivan , Chizhevskaya Svetlana , Choynzonov Evgeny T.
Published: January 2015

We study the possibility of using SPECT with 99mTc-MIBI for the evaluation of the effectiveness of neoadjuvant chemotherapy for cancer of the larynx and laryngopharynx treatment. The study included 20 patients who have cancer of larynx or laryngopharynx. The patients underwent SPECT with 99mTc-MIBI before treatment and after two courses of neoadjuvant chemotherapy. In processing the results indices tumor / submandibular salivary gland and tumor / parotid gland were calculated. These results indicate that in the group of patients with tumor regression of more than 30%, a decrease of the calculated parameters was also more than 30%. At the same time calculated indices showed a decrease of less than 30% in patients with tumor regression of less than 30% on a scale RESIST.
Development of Magnetic-Resonance Contrast Composition Based on Disodium Salt of Gd-DTPA
Authors: Skuridin Viktor S. , Stasyuk Elena S. , Chernov Vladimir I.
Published: January 2015

In this research we have studied contrast composition in the form of an aqueous solution containing gadolinium oxide (Gd2O3), diethylenetriaminepentaacetic acid (DTPA), medical polymer - polyvinylpyrrolidone mol. sq. (12000 ± 5000) daltons in an amount of 0.5-5 wt. %. To reduce the content of free gadolinium in the composition it has been suggested to change the stoichiometric ratio of the concentrations of DTPA/Gd2O3in the mixture. The studies have shown that at a concentration ratio of DTPA/Gd2O3, 2.07 - 2.10 the impurity content of free gadolinium is at least 0.25%, which is significantly below the regulated value - 0.5%. The conducted biomedical tests have confirmed the functionality of the resulting contrast composition.
New Porphyrins/Calf Thymus DNA Complexes - Their Thermostability
Authors: Aloyan Lusine , Dalyan Yeva , Gogolev Aleksey
Published: January 2015

The paper studies the melting parameters of the complexes of water soluble cationic 3N- and 4N-pyridyl porphyrins with different peripheral substituents (oxyethyl, buthyl, allyl, metallyl) with DNA. The results indicate that the presence of porphyrin changes the shape and parameters of DNA melting curve. The porphyrin concentration increase results in the increase of the melting temperature (Tm) and melting interval (ΔT) of DNA. With the porphyrin-DNA concentration ratio ν = 0.01, changes of melting temperature have not been observed. The melting intervals almost do not change upon the addition of the 4N- porphyrins, while the decrease of ΔT is observed in the presence of 3N-porphyrins. Because of the intercalation binding mechanism occurring in GC-rich regions of DNA, we assume that 3N-porphyrins intercalated in GC-rich regions, reduce the thermal stability of these sites, bringing them closer to the thermal stability of the AT-sites, which is the reason for the decrease in melting interval. While with the relative concentration ν = 0.01 for 4-N porphyrins the external binding mechanism “turns on” and destabilizing effect of porphyrins on GC-pairs compensated by their stabilizing effect on AT-pairs. As a result, no change in the melting parameters of DNA is observed upon complexation with these porphyrins.
Stimulation of Bone Tissue Reparative Regeneration by Implants with Bioactive Coating for Diaphyseal Fractures
Authors: Popkov Arnold V. , Popkov Dmitriy A. , Kononovich Natalya A. , Gorbach Elena N. , Tverdokhlebov Sergei I.
Published: January 2015

The open fracture of femur has been experimentally modeled on dogs. A comparative analysis of the consolidation process under the osteosynthesis with the Ilizarov apparatus (the first group of animals) and the combination of osteosynthesis with the Ilizarov apparatus and intramedullary reinforcement with hydroxyapatite-coated wires (the second group of animals) has been carried out. Fracture consolidation in the second group has been confirmed morphologically in 2-3 weeks without signs of fibrous and cartilaginous tissue. In case of osteosynthesis with the Ilizarov apparatus only, the process of reparative regeneration was slowed down.
Temperature Effect on the Rate of Hydrogen Desorption by Carbon Materials
Authors: Gulidova Lyudmila V. , Dubrova Natalya A. , Lider Andrey M.
Published: January 2015

The paper presents the theoretical foundations of carbon nanotubes, as well as the methods of the saturation of carbon materials containing nanotubes with hydrogen from the gaseous phase. The dependences of hydrogen storage concentration on the pressure (between 0 and 8 atmospheres) at the same temperature for adsorption (–30 degrees Celsius) and different temperatures for desorption have been obtained. Obviously, at 8 atmospheres the concentration of hydrogen storage varies with the change of the temperature. Particular attention was paid to the influence of the temperature on the rate of desorption.
Mean-Square Convergence of Recursive Kernel Estimators of Non-Homogeneous Poisson Process Intensity Function and its Derivative
Authors: Kitaeva Anna V. , Kolupaev Mikhail V.
Published: January 2015

The structure of the estimators is similar to the recursive kernel estimators of a density function and its derivative. The estimators have been constructed using a single realization of Poisson process on a fixed time interval. Mean-square convergence has been proved in a scheme of series. Simulation studies have been carried out to illustrate the convergence.
Model of Emergency Shutdown System of TOKAMAK KTM
Authors: Pokrovsky Pavel , Kudryavtsev Vladimir
Published: January 2015

The computer model of emergency shutdown (ESD) system of Tokamak has been developed. Xcos extension of the package Scilab of linux operating system was used for developing the model. The simulated system monitors the most ultimate in terms of the integrity of the preproduction equipment and personnel safety parameters and provides an opportunity to prevent accidents. In the accidents occur the system executes algorithms of protective effects providing the complex transfer to a safe state, which allows to reduce consequences of possible accidents.
Radiation Portal Monitors: Problems and Development Prospects
Authors: Dudkin Artem V.
Published: January 2015

The problem of non-proliferation of special nuclear materials remains actual, so it is required to study new technologies and perspective materials for ensuring radiation monitoring at checkpoints. In this article application of radiation portal monitors of special nuclear materials is reviewed considering features of physical protection systems of nuclear facilities. Russian and foreign experience of radiation portal monitors design is summarized. A number of means to improve design of radiation portal monitors of special nuclear materials were offered. Also problem and important role of materials research is indicated considering development of radiation monitoring technologies.
Spatial Distribution of Potential Created by an External Perturbation in Pd and PdH
Authors: Silkin Vyacheslav M. , Nazarov Vladimir U. , Chernov Ivan P.
Published: January 2015

Spatial distributions of a potential established inside a crystal by an externally applied potential are investigated theoretically in Pd and PdH. The calculations were performed in the framework of the linear-response approach with full inclusion of the electron band structure obtained within a self-consistent pseudopotential scheme. Analysis shows that in clean palladium the potential amplitude is maximal at the octahedral sites of the fcc lattice where the hydrogen ions predominantly reside. On the other hand the corresponding amplitude is significantly lower at the palladium ion positions. We observe drastic modifications in the screening properties in Pdupon hydrogen absorption. Nevertheless, the potential amplitude in PdH is also small at the Pd sites, whereas that at the H sites is significantly larger. However, in PdH the H ions are located at places where a local shallow minimum in the induced potential amplitude is observed. These results only slightly depend on the magnitude of the momentum transfer.
The Intensity of Ion Formation in Soil within the 30-Kilometer Zone of Fukushima Daiichi Nuclear Power Plant
Authors: Kolotkov Gennady A.
Published: January 2015

The paper performs the distribution mapping of ion formation intensity based on the contamination map around Fukushima Daiichi Nuclear Power Plant (FDNPP). The study compares the ion formation intensity in soil after Fukushima and Chernobyl nuclear accidents.
Development of a Thermal Model of the Experimental Electrolyzer
Authors: Gladyr Elena M. , Denisevich Aleksandr A. , Demyanenko Nataliya V.
Published: January 2015

The article provides a mathematical description of the thermal processes in the experimental electrolyzer. We have performed computer simulation and verified the adequacy of the model obtained. All thermal processes occurring in the installation during its operation have been identified. The data are currently being used in the synthesis of automatic control systems (ACS).
Fluoride Technology of Processing Oxides of Rare Earth Elements
Authors: Swarovski Alexander Y. , Soloviev Alexander I. , Kalashnikov Anatoly L. , Malyutina Valentina M. , Sitnikov Arthur S. , Vasilyeva Olga L. , Shalyapin Sergey V.
Published: January 2015

The paper describes the advantages and characteristics of the fluoride technology applicable for the recovery of oxides of rare earth elements with the help of a fluorinating agent of elemental fluorine. A metallurgical mixture (2.5 m2/g) of rare earth elements oxides of the cerium subgroup, containing % wt.: CeO2 - 50-55; La2 O3 - 23-25; Pr6O11 - 6-9, and Nd2O3 - 13-16 were studied. It has been shown, that using fluoride technology allows recovering mixture of rare earth elements with outlet no less than 98.9 %.
Carbon and Oxygen Atoms Distribution along Low-Temperature Plasma Torch in the Magnetic Field
Authors: Myshkin Vyacheslav F. , Izhoykin Dmitry A. , Bespala Eugeny V. , Ushakov Ivan A.
Published: January 2015

The atomic lines intensity of carbon and oxygen in low-temperature plasma are shown. Measurements are made at different distances from the electrode depending on the composition of the plasma forming gas mixture and external magnetic field presence.
Crystal Structure of the New Compound TbCo0.67Ga1.33
Authors: Liang Liu Qing , Shen Wen Jun , Zeng Ling Min , Huang Cai Min
Published: January 2015

A new ternary compound TbCo0.67Ga1.33 was discovered and studied by means of X-ray powder diffraction technique. The crystal structure of the new compound was refined by using Rietveld method from X-ray powder diffraction data. This compound crystallizes in the orthorhombic with the CeCu2 structure type( space group Imma, a = 0.43384(6) nm, b = 0.70193(1) nm, c = 0.75617(1) nm, Z = 4, and Dcalc = 8.512 g/cm3 ). The Rietveld refinement results were Rp = 0.0996, Rwp = 0.1277.
Effect of Different Binder on the TiC Reinforced Steel Matrix Surface Composites
Authors: Bai Jing Lei , Lin Tao , Wang Zhi
Published: January 2015

In this paper, TiC reinforced steel matrix surface composites were prepared by vacuum evaporative casting infiltration process and self-propagating high-temperature synthesis. The effect of original composition, binder types and original coating density on the hardness, wear resistance and microstructure of the coating were also studied. The results showed that the Ti and C content was 80% while added 3% PVA, by pressed at 200MPa pressure leading optimal coating quality. Meanwhile the average hardness was 62.5HRC and the wear rate was 22 % of high manganese steel.
Preparation and Characterization of Inclusion Complexes between Cyclodextrin and Block Polyether Polysiloxanes
Authors: Xie Jun Peng , Ding Wan Wan , Guan Rui Fang
Published: January 2015

A amphiphilic triblock copolymer, poly(ethylene oxide) -poly(dimethylsiloxane) -poly(ethylene oxide) (PEO-PDMS-PEO) was synthesized via a simple hydrosilylation reaction, and inclusion selective rule of cyclodextrins (α–CDand γ-CD) and PEO-PDMS-PEO to form inclusion complexes were discussed in this paper. Selective inclusion's impact on the triblock copolymer( PEO-PDMS-PEO) was studied.
The Experimental Study of the Adsorption Behavior of Cd on Manganese Dioxides
Authors: Cui Yan Hui , Yan Shou Gang
Published: January 2015

This paper studied the adsorption behavior of Cd on manganese dioxide, focusing on the factors of affecting the adsorption. The results showed that the adsorption equilibrium was reached in about six hours. The amount of manganese dioxide adsorption of cadmium ions increased with the increasing of the initial Cd2+ concentration, and then decreased, adsorption isotherms accorded with Langmuir isotherm equation. The most influence factor on the adsorption properties of manganese dioxide was pH value. After the addition of inorganic salts, only ammonium bicarbonate could promote the adsorption of cadmium, other inorganic salts inhibited the adsorption of cadmium.
Synthesis and Characterization of TiC Powders by Carbothermal Reduction Method in Vacuum
Authors: Sun Hong Yan , Kong Xin , Sen Wei , Liu Gui Yang , Yi Zhong Zhou
Published: January 2015

TiC powders have been prepared with titanium dioxide and charcoal powders as raw materials by vacuum carbothermal reduction technique. Meanwhile the as-prepared TiC powders were characterized by acid corrosion resistance test and oxidizability test. The results show as follows: the acid corrosion resistance of titanium carbide powders prepared at the optimum experiment conditions is better than that of industrial powders. It hardly dissolves in HCl, H2SO4, HNO3, HF, HClO4and aqua regia, and slightly dissolves in mixed solution HF+HNO3. The TiC powders are gradually oxidized at 352°C~917°C at air atmosphere and the product may be titanium dioxide and titanium oxides with lower valence. When the temperature rises to 546°C, a large quantity of titanium carbide powders are oxidized. And when the temperature rises to 688°C, besides the titanium carbide powders are oxidized to release heat, the free carbon is also oxidized and transformed into CO2gas to escape.
Effectiveness of 1-Methylcyclopropene Treatment on Peach Fruit (Prunus persica L.) for Extending Storage Life
Authors: Yang Xiang Zheng , Wei Wen Wen , Lv Ping , Feng Jian Hua
Published: January 2015

In order to maintain better quality of peach during cold storage and to extend the storage time, effects of different dose of 1-methylcyclopropene (1-MCP) treated of fresh kiwifruit on quality were investigated and the physiochemical attributes were subsequently evaluated during 60 days storage at 0 °C. Results showed that 1-MCP treatment had a high effect on inhibiting the respiratory rate, total soluble solid decrease and maintaining titratable acid content during the end of the storage compared with the non-treated control.Moreover, 1.0 μL/L 1-MCP showed the best effect on maintaining the quality and extending storage life.
Research on Structural and Ultra-Structural Changes of Grass Carp during Different Crisp Periods
Authors: Wu Fang Fang , Lin Wan Ling , Li Lai Hao , Yang Xian Qing , Hao Shu Xian , Yang Shao Ling , Hu Xiao , Wei Ya , Wang Jin Xu
Published: January 2015

In order to study the influence of muscle structural changes on the special brittleness mechanism of crisp grass carp (Ctenopharyngodon idellus C.et V, CGC) during different crisping process of grass carp (Ctenopharyngodon idellus, GC), samples were periodically acquired and then prepared for light and transmission electron microscopy during the whole process. For GC and CGC, all muscle tissues had typical features, whereas there were much more interstitial tissues and narrower intermyofibrillar spaces in CGC than those in GC. Meanwhile, the muscle fibers diameter, intermyofibrillar space and myofibrils to endomysium detachment lengths of GC were significantly decreased with increasing duration of crisping time. While the muscle fibers density and sarcomere lengths were significantly greater in CGC than in GC. In view of the structural and ultra-structural differences in these samples, it was conceivable to suggest that short muscle fiber diameter, high fiber density, narrow intermyofibrillar spaces and wide lengths of sarcomere were the main causes of increased muscle brittleness.
The Characteristics of Facet Coatings on Diode Lasers
Authors: Li Zai Jin , Qu Yi , Li Te , Lu Peng , Bo Bao Xue , Liu Guo Jun , Ma Xiao Hui
Published: January 2015

The effect of the output power with different facet passivation methods on 980 nm graded index waveguide structure InGaAs/AlGaAs laser diodes was studied. The output power of the 980 nm laser diodes with Si passivation, and ZnSe passivation at the front and the back facet were compared. The test results show that output power of the ZnSe passivation method is 11% higher than Si passivation method. The laser diode with the Si passivation film is failure when current is 5.1 A, the laser diode with the ZnSe passivation film is not failure until current is 5.6 A And we analyzed the failure reasons for each method. In conclusion, the method of coated ZnSe passivation on the laser diode facet can effectively increase the output power of semiconductor lasers.
Application of Concrete Filled Steel Tubular Supports in the Shaft Station
Authors: Xie Hao , Zhang Feng Yin , Guo He , Zhang Bao Sen
Published: January 2015

In order to solve the issues of large deformation and difficult to support in Lu Cun coal mine-270m level shaft station, the reasons of damage to the original roadway supporting conditions have been analyzed through the field investigations. A composite supporting scheme which depend mostly on concrete-filled steel tubular (CFST) supports, spray the anchor net and surrounding rock grouting reinforcement technology as a supplement was designed. The cross-section of the supports is circular. The main steel pipe is 20# seamless steel pipe with diameter of 194mm and wall thickness of 8mm. It is shows that the composite supports can effectively control the deformation of surrounding rock of roadway and maintain long-term stability.
Bending Bearing Capacity of Steel Tubular Columns Filled with Steel-Reinforced High-Strength Concrete
Authors: Guan Ping , Chen Lan Xiang
Published: January 2015

Steel tubular column filled with steel-reinforced high-strength concrete (STSRHC) has higher bearing capacity and seismic performance, so STSRHC has a good application prospect in Engineering. So far, it is in the stage of research. To calculate the bending bearing capacity of steel tubular column filled with steel-reinforced high-strength concrete (STSRC), the bending resistance of STSRHC is predicted by the method of plastic stress distribution, and the formula of bending bearing capacity is successfully established. The results show that the calculated results based on the plastic stress distribution method and the experimental ones are in agreement well, and the formula can be used into columns that have different section form of inserted steel. The conclusions have a guiding significance on improving other performances of STSRHC.
Evaluation of Durability and Permanent Deformation of Modified Road Base Construction Using Rovene® 4045 and Portland Cement Additives
Authors: Baghini Mojtaba Shojaei , Ismail Amiruddin , bin Karim Mohamad Rehan
Published: January 2015

Due to lack of previous study on applying polymer additives in road base construction, this research presents experimental results on the improvement of long-term road base performance by the addition of carboxylated styrene–butadiene emulsion (Rovene® 4045) and Portland cement. The specimens stabilized with Portland cement (0–6%) and Rovene® 4045 (5–10%) and then subjected to different stress sequences to study the wetting and drying (WD) and wheel tracking (WT) tests on the 7-day-cured specimens. Results of tests conducted to assess the specimens’ resistance to WD cycling showed that the addition of a 4% Portland cement–7% Rovene® 4045 mixture resulted in reductions of 86.99% in water absorption, volume changes of 88.55%, and weight changes of 92.84% relative to a sample with only 4% cement after 12 WD cycles. The permanent strain behaviour of the samples was assessed by the WT test. The results of WT test showed that the permanent deformation characteristics of the mixture were considerably improved by utilization of Rovene® 4045 modification, which resulted in reductions of 218.9% at 25 oC, and 356.8% at 50 oC in permanent strain of the mixture respectively. Therefore, this research nominates a new polymer additive having outstanding engineering properties and environmental friendly.
Numerical Analysis on the Failure Mode of Stage Backfill Stope due to Mining Disturbance
Authors: Lan Shi Zhong , Hou Yun Bing , Fan Pan Feng
Published: January 2015

Based on engineering background of Hemushan iron mine, the stress state, the displacement deformation and the plastic zone changes characteristic of backfill stope during different excavation processes are simulated. The results show that the maximum excavation effect domain happens around the surrounding rock and panel pillars. The vertical displacement of the room roof increases during excavation processing. The ore-body adjacent to the mined out area leads tensile failure trends. The tensile and shear zone dominates the room roof rock, and the support pillar is under shear significantly. The failure mode of SBF stope is obtained
Research on Precision of Partial Coefficient Finite Element Method in Stability Analysis for Rock Slope
Authors: Wang Gang , Su Long , Pang Jun Rui , Sun Wei
Published: January 2015

Partial coefficient finite element method is a new method of analyzing the stability of jointed rock slope. Partial coefficient Finite element analysis of joints rock slope stability, the calculation accuracy will be influenced by many factors, Such as the yield criterion, the mechanical parameters of rock mass, the computing grid, etc. In this paper, combined with example analyzed the impact of these factors on the partial coefficient method calculation accuracy. Considering material partial coefficients of slope’s weak layer, then, the weak layer is reduced by the strength reduction method. Analysis results show that: Using partial coefficient method analysis of stability of rock slope, under the associated flow rule, should choose Mohr-Coulomb inscribed circle criterion. In addition, when using Mohr - Coulomb inscribed circle criterion, the modulus of elasticity and poison’s ratio on the calculation results can be ignored. And with a few elements ideal result can be deduced.
Comparison of Dyeing Properties between PPT and PET Fiber
Authors: Cui Shu Ling
Published: January 2015

A comparative study of dyeing properties of PPT and PET fiber is carried out. Experiments show that the K/S value, dyeing up-take, and permeability of PPT fiber are obviously higher than those of PET fiber under the same dyeing conditions. The optimized dyeing process parameters for PPT fiber are temperature 110°C, pH 7, and time 40 min.
Carbonization Research in ULCS Continuous Casting
Authors: Peng Qi Chun , Deng Li , Song Jia Lin , Sheng Xi Song , Deng Pin Tuan
Published: January 2015

According to ULCS production practice in domestic steel,in combination with laboratorial data, this paper analyzes the influence factors of ULCS carbonization. The statistical results shows that carburization of ultra-low carbon steel is affected by mold flux、continuous casting process and refractory,and some corresponding control measures are put forward.
Experimental Study on Delamination during Trimming of CFRP
Authors: Chen Qing Liang , Zhou Jing Wen , Chen Xue Mei , Chen Yan , Fu Yu Can
Published: January 2015

Carbon fiber reinforced plastics (CFRP) laminates with different top/bottom fiber direction angle (stacking sequences of each ply) are trimmed at various workpiece inclined angles. Four types of delamination are studied and discussed. The results indicate that fiber direction has great influence on the type of delamination and the workpiece inclined angle determines the proportion of each type of delamination expect a special cast that the delamination form turns into type I/II when the workpiece inclined angle is 58.6o. Stacking sequences of each ply have great influence on the numbers of damaged plies and the 0o fiber direction ply has the ability to prevent the development of damaged ply.
Hydro-Mechanical Deep Drawing Simulation and Preparation of Novel Al-Li Alloy Irregular Cups
Authors: Ling Juan , Li Hua Guan , Tao Jie , Guo Xun Zhong , Wang Hui , Luo Xin Yi
Published: January 2015

The true stress-strain curves of 2198-T3 aluminum-lithium alloy in three different orientations (0°,45° and 90°) were measured by uniaxial tensile test. Finite element analysis technique was used to simulate the forming process of irregular cup, and the hydro forming experiments were conducted with YB32-100t press machine. The results showed that the key forming parameter-n values were similar in three orientations. Simulation results illustrated that the thickness of the blank reached the lowest value at the round corner. Experimental results verified friction was a significant factor to manufacture a qualified competent. Meanwhile, the experimental results agreed well with the simulation ones. The practical thickness distribution of 2198-T3 irregular cup along the section line was coincided with simulation.
Effect of Annealing Time on Properties of Cr/NbCr2 Alloy
Authors: Deng Li Ping , Lu Shi Qiang , Xiao Xuan , Wang Ke Lu
Published: January 2015

Cr/NbCr2 alloy containing with 91at.%Cr and 9at.% Nb was prepared by mechanical alloying and hot pressing .Then it was annealing at 1200°C for10h, 30h,50h,100h ,respectively in vacuum condition. The results show that the relative density of Cr/NbCr2 alloy increases slightly with the annealing time. Meanwhile, Vickers hardness of Cr/NbCr2 alloy decreases with the annealing time. After annealing at 1200 °C for 100 h, the relative density and Vickers hardness of Cr/NbCr2 alloy vary from 98.9% to 99.7% and 5.6 GPa to 3.78 GPa, respectively. Due to the good plasticity of chromium solid solution, obvious plastic deformation appears during room temperature compression tests. After annealing at 1200°C for 10h, the compression properties of Cr/NbCr2 alloy, such as compressive strength, yield strength and strain, get the maximum value.
Study on Potential-Controlled Flotation Test of a Copper-Lead-Zinc Polymetallic Sulphide Ore
Authors: Zhang Jun Hui , Zhang Yuan , Yang Yong Tao
Published: January 2015

The study on potential-controlled flotation test of differential flotation process was carried out in the light of the change of a certain ore properties. The test used self-developed EMZ-91, as well as conventional collectors of ethyl thio carbamate and butyl xanthate for the flotation of copper, lead and zinc ores respectively, in which the copper sulfate was used as the activator of zinc mineral. The new differential flotation process, which is using lime to regulate pulp potential, produced the copper concentrate grading 27.18% copper at 73.37% recovery, the lead concentrate grading 66.00% lead at 63.00% recovery, and the zinc concentrate grading 55.27% zinc at 87.69% recovery.
Using the Vacuum Ion Nitriding Process to Improve the Quality of 38CrMoAIA Cylinder
Authors: Zhang Liang Zhi , Zhang Han , Ding Lin Yao
Published: January 2015

In order to replace traditional gas nitriding with vacuum ion nitriding process, the 38CrMoAIA cylinder is used for the experimental research. Based on the 10 groups of cylinder specimen analysis of experimental results, surface hardness, hardness gradient, brittleness levels, nitriding depth and size change all meet the requirements of the technology of the cylinder liner. Aiming at the important link in the experiment, some problems needing attention in the process of nitride are put forward. Vacuum ion nitriding due to mature technology, good effect of nitride can be applied to mass production.
Photoluminescence Properties of YAl3(BO3)4:RE3+ (RE=Ce/Dy/Tb) Phosphors
Authors: Rangari V.V. , Singh Vijay , Dhoble S.J.
Published: January 2015

YAl3(BO3)4 doped with three rare earth (RE) ions namely Ce3 +, Dy3+ and Tb3+ were prepared by the conventional solid state diffusion method. The phosphors were characterized using X-ray diffraction (XRD), scanning electron microscopy (SEM) and photoluminescence (PL) techniques. PL spectra of Ce-doped samples showed the Ce3+ emission characteristic due to the 5d-4f transition. Dy-doped sample upon excitation at 351 nm, showed peaks corresponding to the 4F9/2→6H15/2 and 4F9/2→6H13/2 transitions. PL spectra of Tb-doped sample showed peaks corresponding to the 5D3→7FJ transition. Upon excitation at 364 nm, the enhanced luminescence observed in Ce3+ co-doped YAl3(BO3)4:Tb3+/Dy3+ phosphors is understood as due to energy transfer from Ce3+ to Tb3+/Dy3. The color purity has also been verified by using the chromaticity diagram.
Unified Approach for Accurate and Efficient Modeling of Composite Rotor Blade Dynamics The Alexander A. Nikolsky Honorary Lecture
Authors: Hodges Dewey H.
Published: January 2015

Herein is described the development of a unified approach, which spans several decades and facilitates accurate and efficient modeling of composite helicopter rotor blades for loads, dynamics, aeroelasticity, and stress recovery. The approach achieves accuracy comparable to that of
three-dimensional finite element analysis but with significant savings in computational effort. The basis for this approach is a mathematical technique called the variational asymptotic method. This paper summarizes the modeling approach and presents some of the key equations of the resulting
analyses. Examples are presented that illustrate the accuracy and efficiency of the approach as implemented in the computer application Variational Asymptotic Beam Section (VABS) and appropriate beam equations, along with ample citations to published works in which these analyses are developed
and/or used.
Noninvasive Fractional Flow Reserve for the Diagnosis of Lesion-specific Ischemia: A Case Example
Authors: Jensen Jesper Møller , Gormsen Lars Christian , Mølgaard Henning , Nørgaard Bjarne Linde
Published: January 2015

A physically active 52-year-old male with atypical chest pain was referred to our department. A coronary computed tomography angiography (CCTA) showed a stenotic plaque in the mid left anterior descending coronary artery (LAD). A rest–stress Rubidium-82 myocardial perfusion was normal. One year later the patient sustained a cardiac arrest and percutaneous coronary intervention of the mid-LAD was successfully performed. The original CCTA data were submitted for noninvasive determination of fractional flow reserve (FFRCT) revealing an ischemia-producing lesion in the mid-LAD. This case demonstrates the inherent limitations of assessing lesion-specific ischemia. FFRCT shows promise as a new method for future selection of patients for coronary angiography.