• Phenolic compounds from the leaves of Ricinus communis LinnPhenolic compounds from the leaves of Ricinus communis Linn

    ABSTRACT Introduction: Ricinus communis Linn. (Castor oil plant) is a monotypic species of Ricinus genus (Euphorbiaceae) and widely distributed in all tropical countries. Phytochemical data of this plant are scarce. As part of ongoing research on a survey of Vietnamese medicinal plants, the investigation of this plant was performed. The isolatio...

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  • The effects of internal and external barriers on Vietnamese students’ entrepreneurial intentionThe effects of internal and external barriers on Vietnamese students’ entrepreneurial intention

    This study aims to investigate the effects of internal barriers, including personal traits and cognitive conditions, and external barriers, including normative and regulative structures, on entrepreneurial intention among Vietnamese students. By collecting data from 437 students at high schools, universities and colleges in Vietnam, authors emplo...

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  • Effects of different nitrogen fertilizer levels on yield, leave color, and content of bioactive compounds of Pouzolzia zeylanica L. BennEffects of different nitrogen fertilizer levels on yield, leave color, and content of bioactive compounds of Pouzolzia zeylanica L. Benn

    ABSTRACT The study was carried out to investigate the effect of 4 levels of nitrogen fertilizer (10, 15, 20 and 25 kg urea/1000 m2) applied on the color of leaves (chlorophyll index SPAD and the red-purple color by a* value in Hunter’ color system), yield and bioactive compounds content (anthocyanin, flavonoid, polyphenol and tannin) of Pouzol...

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  • Các phương pháp nơtronCác phương pháp nơtron

    1. Phương pháp nơtron- gamma NGK a) Cơ sở vật lý: Bắn phá đất đá ở thành giếng khoa n bằng các hạt nơtron và đo cường độ bức xạ gamma phát xạ từ một số nguyên tố nhất định trong đá do kết quả bắt giữ nơtron nhiệt là nguyên tắc chung của phương pháp nơtron- gamma. Các nơtron nhanh bắn ra từ nguồn S, va chạm với các hạt nhân trong môi trường c...

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  • Removal of rhodamine b dye by plasma jet oxidation processRemoval of rhodamine b dye by plasma jet oxidation process

    Abstract. Recently, nonthermal atmospheric pressure plasma has been developed as a novel tool in removal of water pollutants. Rhodamine B dye, widely used in textiles and biology, is toxic to both humans and animals, hence removing residual Rhodamine B in solution is necessary. In this work, we set up a cold plasma jet system and used it to effe...

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  • Supercontinuum generation in photonic crystal fibers infiltrated with liquidsSupercontinuum generation in photonic crystal fibers infiltrated with liquids

    Abstract. In this paper we present the development of a new direction in so-called optofluidics, namely the research of photonic crystal fibers (PCF) infiltrated with liquids. In particular we concentrate on the flagship application of PCF, the process of Supercontinuum Generation (SG), in which injected monochromatic pulse may be dramatically br...

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  • Molecular emissions from circumstellar envelopes in the presence of a binary companionMolecular emissions from circumstellar envelopes in the presence of a binary companion

    Abstract. Following our previous work on the hydrodynamic simulations of the structure of circumstellar envelopes in the presence of a binary companion, in this paper we present the results of radiative transfer calculations for molecular emission line HC3N J = 5 – 4 from these simulated circumstellar envelopes. We show that the molecular line em...

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  • Compression effects on structural relaxation process of amorphous indomethacinCompression effects on structural relaxation process of amorphous indomethacin

    Abstract. Indomethacin is a common nonsteroidal anti-inflammatory drug, but its glass transition behaviors remain ambiguous. Here we present a simple theoretical approach to investigate the molecular mobility of amorphous indomethacin under compression. In our model, the relaxation of a particle is governed by its nearest-neighbor interactions a...

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  • Synthesis of ZnSe nanocrystals for solid-state lighting applicationsSynthesis of ZnSe nanocrystals for solid-state lighting applications

    Abstract. We report the large-scale synthesis of highly luminescent ZnSe nanocrystals (NCs) by a simple and low-cost hydrothermal method. XRD (X-ray Diffraction) and HR-TEM (High Resolution Transmission Microscopy) characterization studies confirmed the formation of as-synthesized ZnSe NCs in cubic structure. The optical property of ZnSe NCs was ...

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  • Photocurrents in GaAs quantum wires including excitonic effectsPhotocurrents in GaAs quantum wires including excitonic effects

    I. INTRODUCTION Electric currents can be optically generated in noncentrosymmetric materials due to the lack of inversion symmetry in their crystal structure. Depending on the formation mechanism, photocurrents can be classified into different types: ballistic, shift, and rectification currents. These photocurrents have been investigated in bulk...

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