• On non - Linear approximations of periodic functions of besov classes using greedy algorithmsOn non - Linear approximations of periodic functions of besov classes using greedy algorithms

    Received: 7 January 2016 / Accepted: 13 April 2016 / Published: May 2016 ©Hong Duc University (HDU) and Journal of Science, Hong Duc University Abstract: In the present paper, we extend the results of Dinh Dung [5] on non-linear n-term L q - approximation and non-linear widths to the Besov class SBp, where 1 , p q 0,  and  is a given function o...

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  • A study on multiplication of oncidium-sweet sugar by using cell tissue cultureA study on multiplication of oncidium-sweet sugar by using cell tissue culture

    Abstract: Orchid is a specious kind of flower that brings about high economic value to flower production and flower business. Production of Orchids in Vietnam has been limited to its development, especially production of Oncidium-Sweet Sugar Orchids. Research on a process of rapid multiplication of Oncidium-Sweet Sugar Orchids by using cell tiss...

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  • Towards the development of protein expression by inducible ecdysone systemTowards the development of protein expression by inducible ecdysone system

    Abstract: The ecdysone inducible system was generated for checking the toxicity of target gene which was transected into the cells. The transcription unit, modified ecdysone receptor (IND) was cloned into vector pcDNA-Dest40 to form the new inducible expression plasmid pDest40-IND via cloning technique. A clear band with size about 487bp of PCR ...

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  • On nearly prime submodulesOn nearly prime submodules

    1. Introduction and preliminaries In [10], weakly prime ideals in a commutative ring with non-zero identity have been studied. Many authors have studied the notion of weakly prime ideals in module theory. In particular, many properties of weakly prime submodules have been introduced by M. Behboodi and H. Koohi in [11]. In this paper, we introdu...

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  • Quantitative analysis of fresh tomatoes (Solanum lycopersicum) for trace of pesticide residues from markets in Peshawar, Pakistan, using High Performance Thin Liquid Chromatography techniqueQuantitative analysis of fresh tomatoes (Solanum lycopersicum) for trace of pesticide residues from markets in Peshawar, Pakistan, using High Performance Thin Liquid Chromatography technique

    ABSTRACT Background: Vegetables and fruits are vital constituents of human diet, as it provides necessary minerals and nutrients to human body to carry out biological reactions and provide protection against various diseases and injuries. Solanum lycopersicum (tomato) is consider as cash crop in Asian countries and are fine source of vitamin C,...

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  • Potential applications of waste lignin from the paper and pulp industry in Viet NamPotential applications of waste lignin from the paper and pulp industry in Viet Nam

    ABSTRACT The conversion of waste lignin from the paper and pulp industry is a potential process to produce chemicals and materials in the industry. With the development and the demand for the pulp and paper industry, the amount of waste lignin will increase remarkably. In Vietnam, the forest tree for the pulp industry is abundant, and the pulp ...

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  • 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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