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[en] Innovation is considered as a core element of sustainable competitive advantage in the rapidly changing environment. However, in Vietnam, researches on innovation are very rare, which are mostly general reports without underlying analyses of innovation in firms, especially determinants for innovation. Therefore, this paper focuses on analyzing critical successful factors for innovation in Vietnamese firms. Design/methodology/approach: This study used primary data through questionnaire survey from November 2015 to February 2016. Respondents were senior managers of firms located mostly at Hanoi (Northern), Hochiminh (Southern) and Danang city (Central). The questionnaire included multi-items designed to measure factors. Each item was measured by 5 point Likert scale: 1 (strongly disagree) to 5 (strongly agree). Questionnaires were administerd to 500 firms belonging to list of Vietnam Chamber of Commerce and Industry (VCCI) in these three cities with rate of 40% (Hochiminh city), 40% (Hanoi city) and Danang (20%). However, there were 360 returned questionnaires and valid to next analyses. Analysis methodologies of reliability, factor analysis and regression are utilized in this paper. Findings: We developed and tested a model of determinants for Innovation in Vietnamese firms. The major contribution of this study is testing six determinants for innovation in Vietnamese companies. The results showed that awareness of innovation, innovation strategy and policy, organization for innovation, HR for innovation and building capabilities have positive impact on innovation. Originality/value: This study makes a contribution for both academics and practitioners. For academics, this study provided one more empirical evidence of the determinants for innovation. Regarding practical implications, this study suggests that Vietnamese companies have to strengthen capabilities for employees through training, encourage generation of new ideas, rule breaking, and innovative behaviors by organizational members. Together, having high awareness of innovation, building rational innovation strategy and policy is essential factors that firms should possess and develop to enhance innovation performance. Although there is no confirmation for impact of finance on innovation level, firms should understand that increasing innovation investment can bring favorable condition to create innovation especially in SMEs.
[en] Study and application of nuclear - related analytical techniques have been being one of main tasks at NRI since 1984 to now. With one research Reactor, some equipment for radioactivity measuring and also many physico-chemical analysers (Polarography, Stripping Volt Ammetry, AAS, UV-VIS), the nuclear-related analytical methods have developed and applying at our institute. The past of more than 18 years we have carried out some national scientific research projects, IAEA research contracts and many economic contracts for different scientific-technological fields including: environment, agriculture, geology, biology, mineral oil, industry. Obtained results have contributed for developing of our Institute, other scientific- technological sectors and also economic-social developments of Viet nam. These research directions will be continue in the future. (author)
[en] SCIENTIFIC SCOPE OF THE PROJECT: Complete study for analytical procedures for As, Hg, Se, Cu, Pb, Zn and Cd content in foodstuffs. Estimating for contamination of heavy- toxic metals through foodstuffs at three collected cities. To exchange the experience in the applications of used analytical methods for studying of environmental pollution. Analytical methods been used: Neutron Activation Analysis (INAA, RNAA, DNAA, PGNAA). X-Ray fluorescene. Related analytical methods: Polarography, Stripping Voltammetry, UV-VIS,
[en] Nowadays atomic absorption spectrometry has become valuable method for trace element analysis because high specificity; low detection litmus, easy to use; easy sample preparation, low investment and running costs... atomic absorption spectrometry is generally accepted as one the most suitable method for single - element analysis of trace elements in various kinds of materiel. In 2003, we applied flame - atomic absorption spectrometry for analyzing Ca, Cd, Cu, Pb, Zn...in vegetables and their extracted juices were collected form 11 locations of Dalat, including two kinds of vegetables (goods and safety) in both the summer and winter. Average concentration of Ca = 240 mg/kg wet, Cd = 0.035 mg/kg wet, Cu = 0.67 mg/kg wet, Mg = 131 mg/kg wet, Fe = 8.1/kg wet, Mn = 3.1/kg wet, Na = 3266 mg/kg wet, Pb = 0.345 mg/kg wet and Zn = 3.3 mg wet. In their extracted juices: Ca = 89 mg/kg wet, Cd = 0.008 mg/kg wet, Cu = 0.19 mg/kg wet, Mg = 43 mg/kg wet, Fe = 2.3 mg/kg wet, Mn = 0.61 mg/kg wet, Na = 971 mg/kg wet, Pb = 0.107 mg/kg wet and Zn = 0.65 mg/kg wet. (author)
[en] The project describes hydride generation atomic absorption spectrometry techniques for determination of arsenic (III), total arsenic, antimony (III) and total antimony concentration in water sample by investigating type and concentration of acide and sodium tetrahydroborate concentration. The optimal conditions for determination of arsenic (III) were: 2% (m/v) citric acide and 2%(m/v) sodium tetrahydroborate. The same parameters for determination of arsenic (V) were: 4N of HCl and 2%(m/v) of sodium tetrahydroborate in 10% (m/v) of KI. The optimal conditions for determination of antimony (III) were: 2% (m/v) citric acide and 2%(m/v) sodium tetrahydroborate. The same parameters for determination of antimony (V) were: 6 N of HCl and 2%(m/v) sodium tetrahydroborate in 10% (m/v) of KI. Interference from ions on the analysis for arsenic (III), total arsenic, antimony (III) and total antimony were also investigated. The sensitivity of this method was estimated to be 0.001 ppm, 0.002 ppm, 0.002 ppm and 0.003 ppm for As3+, As3+,5+, Sb3+ and Sb3+,5+ respectively. (author)
[en] Samples were collected from the coastal area of Nhatrang and Ganhrai bay. Sampling and sample preparation techniques for major, minor and trace elemental analysis in marine environmental samples have been investigated and some preliminary work on sample analysis has been performed. More than 20 elements in marine environmental samples in Nhatrang and Ganhrai bay could be measured. It indicates that both INAA and Radiochemical Neutron Activation Analysis (RNAA) methods can be used for the determination of elements in sediment, seawater and biota samples by directly or after sample treatment for chemical separation either volume reduction or preconcentration. (author)
[en] Raman spectroscopy is shown to be a useful tool for the study of phase transitions, oxygen disorder and local vibrational modes in lanthanum manganese compounds of the perovskite type. In this work, we present results of the Raman scattering and x-ray diffraction studies of La0.7Sr0.3Mn1-xMxO3 manganites (M=Fe, Co, Ni, Cr). A part of Mn atoms was substituted by M with x in the range of 0.0-0.60. Raman spectra of the La0.7Sr0.3Mn1-xMxO3 exhibit a significant dependence on the amount and kind of the dopant M, and they are sensitive to the structure and transitions driven by both doping and temperature. X-ray diffraction (XRD) analysis of these samples indicates a change in the cell parameters vs. doping content. Our main focus is the Raman peak at high frequency (>630 cm-1), that is somewhat controversial. The Raman spectra exhibit an additional high frequency mode attributed to the local breathing vibration of oxygen surrounding the substituent ion. The frequency and intensity of Raman spectra in these manganites is very sensitive to the type and content of substituent. From above results, a critical content of substituent at which the structural phase changed was shown.
[en] The studying samples of this work have been collected from different areas of Vietnam including industrial areas in HCM city, Dongnai, Vungtau and non-industrial area, Dalat city. The concentrations of the toxic elements as: As, Hg, Cr, Co, Fe, Cu, Cd, Se, As, Zn, Pb in many foodstuff samples together with intercomparison sample which have been distributed by National Food Administration (Sweden) were analyzed by Instrumental Neutron Activation Analysis (INAA), Radiochemical Neutron Activation Analysis (RNAA); Atomic Absorption Spectrophotometer (AAS) and Anodic Stripping Voltammeter (ASV). The obtained results shown that the concentration of toxic elements in the collected samples from selected industrial areas of Vietnam are lower than the maximum permissible concentrations. (author)
[en] After pesticides are used, the disintegration occurs due to light, temperature, alkaline materials and bio-microorganism in soil and water. The disintegration rate depends on chemical properties of each pesticide and environmental conditions. In this work, use of the method enable plant material to be extracted and cleaned up for gas chromatographic determination of residues of 4 compounds of the organophosphorus and pyrethroid groups as dimethoat, clopyrifos, methidathion and cypermethrin compounds by one or the same procedure. Limit of detection and limit of quantitation are determined in range of 5-10 ng and 0.01-0.05 ppm. Recovery is in range 80-98%. The transformation and disintegration rate in vegetables such as: Nozawana, Perilla and Spinach depends on the stability of pesticides used, the activities of enzyme in soil and water and weather conditions. Their process occurs fast when vegetables are in the interval of growth and in the condition of high temperature, moisture and light intensity. The disintegration rate of 4 compounds of the organophosphorus and pyrethroid groups in vegetables occurs faster in dry season than rainy season (author)
[en] Recently, striking effects of light irradiation on the magnetic state were reported for Prussian blue (PB) analogues AxCoy [Fe(CN)6] (A = Na, K, Rb, Cs). The physical and optical properties of these compounds are dependent on the size of the particles of the material and the effect of size of the particles on the properties of the compounds. In this report, we present a novel synthesis method of the Kx Niy [Fe(CN)6] PB nano-particles and investigate the effect of particle size on the properties of the Prussian blue analog Kx Niy [Fe(CN)6 by analyzing the results of the X-ray diffraction (XRD), scanning electron microscopy (SEM), UV-vis absorption and magnetization measurements of the compounds. (author)