Open Access. Powered by Scholars. Published by Universities.®

Biotechnology Commons™

Open Access. Powered by Scholars. Published by Universities.®

Discipline
Institution
Keyword
Publication Year
Publication
Publication Type
File Type

Articles 1831 - 1860 of 3194

Full-Text Articles in Biotechnology

Power Signal Disturbance Classification Using Wavelet Based Neural Network, Suja S., Jerome Jovitha Nov 2017

Power Signal Disturbance Classification Using Wavelet Based Neural Network, Suja S., Jerome Jovitha

ASEAN Journal on Science and Technology for Development

In this paper, the power signal disturbances are detected using discrete wavelet transform (DWT) and categorized using neural networks. This paper presents a prototype of power quality disturbance recognition system. The prototype contains three main components. First a simulator is used to generate power signal disturbances. The second component is a detector which uses the technique of DWT to detect the power signal disturbances. DWT is used to extract disturbance features in the power signal. The third component is neural network architecture to classify the power signal disturbances.

Go to article

Deformation Of Wood In Compression During Moisture Movement, Hamdan S., Osman M.S., Chew M.Y. Nov 2017

Deformation Of Wood In Compression During Moisture Movement, Hamdan S., Osman M.S., Chew M.Y.

ASEAN Journal on Science and Technology for Development

This work presents the phenomenon of mechano-sorptive strain in the deformation of wood during moisture content (MC) changes. A series of experiments were designed to demonstrate the greatly enhanced deformation due to the mechano-sorptive effect. The purpose of this work is to show the magnitude of mechano-sorptive creep compared to the ordinary viscoelastic creep with applied compressive load. In order to do this, several conditions were induced. They were the moisture movement with MC change, moisture movement without MC change and conditions without moisture movement. Several apparatus were assembled to produce the desired conditions. Special care is taken to make …

Go to article

Effects Of Sr Substitution On Crystalline Structure And Raman Spectra Of La2-Xsrxnio4+Δ, Thanh Tran Dang, Hong Le Van Nov 2017

Effects Of Sr Substitution On Crystalline Structure And Raman Spectra Of La2-Xsrxnio4+Δ, Thanh Tran Dang, Hong Le Van

ASEAN Journal on Science and Technology for Development

Effects of Sr2+ substitution for La3+ on oxygen concentration and structure of La2-xSrxNiO4+δ have been observed by X-ray diffraction and Raman scattering. Oxygen concentration and unit cell volume of the material decrease monotonously in dependence of x. The vibration modes were calculated for La2NiO4 in K2NiF4 type structure with the group symmetry of I4/mmm. The Raman active modes for this symmetry were also theoretically identified. Raman back scattering spectra have been carried out for all the ceramic polycrystalline samples at room temperature. Two Raman lines at 224.6 cm-1 and 433 cm-1 , assigned to Eg and A1g vibration modes of …

Go to article

Studies On A Novel Recombinant Lipase A From Bacillus Subtilis Fs2, Nguyet Phung Thu, Thanh Nguyen Hong, Hai Truong Nam, Janson Jan-Christer Nov 2017

Studies On A Novel Recombinant Lipase A From Bacillus Subtilis Fs2, Nguyet Phung Thu, Thanh Nguyen Hong, Hai Truong Nam, Janson Jan-Christer

ASEAN Journal on Science and Technology for Development

A strain of Bacillus subtilis FS2 isolated from a traditional fish source in Vietnam has been shown to produce an enzyme possessing both a gelatinase and a lipase A (LipA) activity when tested on agar plates containing 0.1% tributyrin and 0.3% gelatine. A gene encoding LipA was isolated and expressed in E. coli BL21 (DE3). The enzyme has got an apparent Mr of 24 kDa, a pI of 9.2 and was purified to electrophoretical homogeneity by affinity chromatography. Both the lipase and the gelatinase showed optimum activity at pH 10 and at 30 0 C, with highest activity in the …

Go to article

Soil-Structure Interaction Analyses Of Pile Supported Building Frame, Chore H.S., Ingle R.K. Nov 2017

Soil-Structure Interaction Analyses Of Pile Supported Building Frame, Chore H.S., Ingle R.K.

ASEAN Journal on Science and Technology for Development

The effect of the soil-structure interaction on the simple single storeyed and two bayed space frame resting on pile group of two piles with flexible cap is examined in this paper by resorting to more rational approach and realistic assumptions. Initially, 3-D FEA is carried out independently for the frame on the premised of fixed column bases. Later, pile foundation is worked out separately. The stiffness so obtained for foundation is used in the interactive analysis of frame to quantify the effect of soil- structure interaction on the response of the superstructure. For modeling the foundation system two approaches of …

Go to article

Genetic Algorithm Based Solution In Pwm Converter Switching For Voltage Source Inverter Feeding An Induction Motor Drive, Jegathesan V. Nov 2017

Genetic Algorithm Based Solution In Pwm Converter Switching For Voltage Source Inverter Feeding An Induction Motor Drive, Jegathesan V.

ASEAN Journal on Science and Technology for Development

This paper presents an efficient and reliable Genetic Algorithm based solution for Selective Harmonic Elimination (SHE) switching pattern. This method eliminates considerable amount of lower order line voltage harmonics in Pulse Width Modulation (PWM) inverter. Determination of pulse pattern for the elimination of some lower order harmonics of a PWM inverter necessitates solving a system of nonlinear transcendental equations. Genetic Algorithm is used to solve nonlinear transcendental equations for PWM-SHE. Many methods are available to eliminate the higher order harmonics and it can be easily removed. But the greatest challenge is to eliminate the lower order harmonics and this is …

Go to article

Electrochemical Model Of Euglena Sanguinea Ehrenberg Stimulated With Multi-Level Electromagnetic Fields, Packamwongsang K., Noppanakeepong S., Naranong N., Phaewbang P., Pleuksananon P., Packamwongsang W. Nov 2017

Electrochemical Model Of Euglena Sanguinea Ehrenberg Stimulated With Multi-Level Electromagnetic Fields, Packamwongsang K., Noppanakeepong S., Naranong N., Phaewbang P., Pleuksananon P., Packamwongsang W.

ASEAN Journal on Science and Technology for Development

This research aimed at studying the property of Euglena Sanguinea Ehrenberg (E. sanguinea) before and after being stimulated by multi-level electromagnetic fields (MLEM). After the stimulation, it was found that physical properties were changed, i.e., cell membrane and components deformed. Main biochemical compositions were changed in accordance with new electrochemical equation which was estimated from FTIR bands. Moreover, the estimated electrical results before and after being stimulated, i.e., impedance and complex relative permittivity of main biochemical compositions from extraction, were then measured, simulated, and compared by means of Cole-Cole plot technique which yielded the statistic correlation 0.89 at 95% confidence …

Go to article

Influence Of Temperature On The Performance Of Photovoltaic Polycrystalline Silicon Module In The Bruneian Climate, Malik A. Q., Ming Lim Chee, Sheng Tan Kha, Blundell M. Nov 2017

Influence Of Temperature On The Performance Of Photovoltaic Polycrystalline Silicon Module In The Bruneian Climate, Malik A. Q., Ming Lim Chee, Sheng Tan Kha, Blundell M.

ASEAN Journal on Science and Technology for Development

The influence of working temperature for a polysilicon module has been investigated in Brunei Darussalam for a period of two years. The rise in temperature produces thermal agitation which not only increases the dark current but also enhances the losses of free carriers in a polycrystalline module. The efficiency and the output power decreases with an increase in the working temperature. A maximum decline in the output power of 97% has been measured under a dominated diffused radiation environment. The temperature coefficients have been obtained and equations are developed to evaluate the change in the rating of module at any …

Go to article

Measurment Of Bending Properties Of Rhizophora Tropical Wood, Hamdan Sinin, Hasan Mahbub, Nohe Yoann Nov 2017

Measurment Of Bending Properties Of Rhizophora Tropical Wood, Hamdan Sinin, Hasan Mahbub, Nohe Yoann

ASEAN Journal on Science and Technology for Development

The Young’s modulus, load at the yield point and proportional limit stress from the compression bending (cb) test were compared with the four point bending tests (4pb). The theoretical Young’s modulus are larger than the real reading for 5mm and 10mm thick specimens, except for 200mm long specimens due to specimen nonlinearity. The experimental results for the short specimens are slightly high compared to the theory due to uniaxial compression in both tensile and compressive planes. Since the additional deflection produced by the shearing force and the stress concentration at the loading point was smaller with the compression bending test …

Go to article

Aromatic Plants From Vietnam, Sources Of Phenylpropanoid Products For Industry, Hoi Tran Minh Nov 2017

Aromatic Plants From Vietnam, Sources Of Phenylpropanoid Products For Industry, Hoi Tran Minh

ASEAN Journal on Science and Technology for Development

Aromatic plants produce by vapour distillation or other processes essential oils which are products with high commercial value used in the natural product industries such flavour and fragrance, perfumes and cosmetics industries as well as pharmaceutical industry. The aim of this study was to characterise some aromatic plants from Vietnam through the chemical composition of their essential oils. We got interested in essential oils which contained a main component with high to ultra high content, susceptible to find an industrial use. For this study, a dozen of plants have been selected. The composition of their essential oils will be compared …

Go to article

Synthesis Of Ferrite Nanoparticles With Protein Molecules Immobillized On Their Surfaces, Hai Tran Hoang, Phuc Le Hong, Dung Doan Thi Kim, Huyen Nguyen Thi Le, Long Bui Duc, Thang Nguyen Tien, Do Vu Van, Quynh Nguyen Nguyen, Abe Masanori Nov 2017

Synthesis Of Ferrite Nanoparticles With Protein Molecules Immobillized On Their Surfaces, Hai Tran Hoang, Phuc Le Hong, Dung Doan Thi Kim, Huyen Nguyen Thi Le, Long Bui Duc, Thang Nguyen Tien, Do Vu Van, Quynh Nguyen Nguyen, Abe Masanori

ASEAN Journal on Science and Technology for Development

The ferrite (a Fe3O4 – gFe2O3 mixed solution) fine particles, ~8 nm in size were synthesized from an aqueous solution. Trypsin, a proteolytic enzyme or a protein, was immobilized onto the surfaces of those particles during the synthesis process. The process was performed in the open air at a temperature as low as 4°C and on near-neutral condition of pH = 9, which is compatible with most of the bioactive molecules as well as trypsin. Therefore this technique is advantageous for preparing magnetite particles having biomolecules immobilized on their surfaces, which will be used for biomedical applications utilizing magnetic separation …

Go to article

Causes Of Tractor Breakdowns And Requisite Solutions A Case Study Of Small Tractor Use In Riau Province, Indonesia, Paman Ujang, Uchida S., Inaba S., Kojima T. Nov 2017

Causes Of Tractor Breakdowns And Requisite Solutions A Case Study Of Small Tractor Use In Riau Province, Indonesia, Paman Ujang, Uchida S., Inaba S., Kojima T.

ASEAN Journal on Science and Technology for Development

A survey has been undertaken to look into the causes of tractor breakdowns on field operations and the main constraints associated with repair and maintenance, and to recommend a solution to the problems in Riau Province. The owners of sixty-two small tractors were interviewed, from three regencies chosen of the Province in 2003. As a result, the working capacity of the tractors was relatively high and the average annual use was relatively low compared to the national average. Most tractor operators did not have sufficient skill to operate tractors. The tractor breakdowns resulted from operators’ mistakes, fuel and oil defilement, …

Go to article

A New Investigation Of Vietnam’S Beryl, Binh Nguyen Van, Hong Nguyen Thi Nov 2017

A New Investigation Of Vietnam’S Beryl, Binh Nguyen Van, Hong Nguyen Thi

ASEAN Journal on Science and Technology for Development

The paper presents briefly new investigation of Vietnam beryl group, especially some characteristics of regional geology of Song Chay granite massif and new find of big crystals of beryl in them. The green beryl is found in quartz - mica - tourmaline, mica - feldspar – quartz pegmatite bodies in the south part of Song Chay granite - gneiss massif near Na Chi and Tan Nam villages, Quang Binh district, Ha Giang province.

Go to article

Artificial Intelligent System For Measurement Of Harmonic Powers, Jerome Jovitha, Vinoth P. Nov 2017

Artificial Intelligent System For Measurement Of Harmonic Powers, Jerome Jovitha, Vinoth P.

ASEAN Journal on Science and Technology for Development

The importance of the electric power quality (PQ) demands new methodologies and measurement tools in the power industry for the analysis and measurement of the basic electric magnitudes necessary. This paper presents a new measurement procedure based on neural networks for the estimation of harmonic amplitudes of current/voltage and respective harmonic powers. The measurement scheme is built with two neural network modules. The first module is an adaptive linear neuron (ADALINE) that is the kernel part of estimation of complex harmonic coefficients of the current/voltage. The second module is feedforward neural network that obtains the harmonic active/reactive powers. In order …

Go to article

Influence Of Silica Colloid On Rheology Of Cement Paste With Superplasticizer, Chuong T.H., Nga P.V. Nov 2017

Influence Of Silica Colloid On Rheology Of Cement Paste With Superplasticizer, Chuong T.H., Nga P.V.

ASEAN Journal on Science and Technology for Development

Information of rheological behavior of binder paste is important for proportioning high slump concrete mixture at low water to cement ratios. This paper presents experimental data on the rheological property of silica colloid incorporated binder paste using naphthalene based and polycarboxylate based superplasticizer, compared to that of silica fume incorporated binder paste. Experimental data showed that silica colloid incorporated binder is compatible to tested superplasticizers in the all investigated range of silica colloid content, whereas the pastes incorporated with high silica fume content (over 10%) indicated incompatibility, especially to naphthalene based superplasticizer. There was also found out saturated content of …

Go to article

Ant Intelligence Routing, Gan Chye Ong, Wong K. Daniel, Woon Wei-Le Nov 2017

Ant Intelligence Routing, Gan Chye Ong, Wong K. Daniel, Woon Wei-Le

ASEAN Journal on Science and Technology for Development

We introduce AIR, a new ant-based routing protocol for ad hoc wireless networks. AIR incorporates recent technology advances in ad hoc routing protocols, such as ring-based searching and third-party reply, while retaining the characteristics and benefits of ant-based routing protocols, including probabilistic routing tables and pheromone evaporation. In addition, we combine the best features of previous ant-based routing protocols with new features like update ants and two-way route establishment, to further improve performance. We compare the performance of AIR against AODV and DSR using appropriately chosen simulations, the results of which are presented and discussed. We find that AIR is …

Go to article

Studies Of Monomer Impregnation And Polymerized “In-Situ” In Wood Using Dynamic Mechanical Thermal Analyzer (Dmta), Hamdan S., Liew Y.L., Talib Z.A. Nov 2017

Studies Of Monomer Impregnation And Polymerized “In-Situ” In Wood Using Dynamic Mechanical Thermal Analyzer (Dmta), Hamdan S., Liew Y.L., Talib Z.A.

ASEAN Journal on Science and Technology for Development

Some tropical hardwoods (acacia mangium, madhuca utilis, dacrydium spp., dipterocarpus spp.,dyera costulata, shorea spp., shorea gibbosa, shorea macrophylla, endospermum diadenum, cratoxylum arborescens) are selected and impregnated with methyl methacrylate (MMA) and polymerized “in-situ” by using catalyst-heat technique. Treatability of the wood as determinedfrom the fractional volumetric retentions of monomer i.e. fraction of voids filled by the impregnant showed that the mean retention range from 15.03% (acacia mangium) to 56.59% (cratoxylum arborescens). The penetration of monomer evaluated using ultrasonic wave showed that the treated wood had higher velocities which indicate significant increase in density. This paper deals with the viscoelastic relaxation …

Go to article

Studies On Chitosan - Benzaldehyde Interaction In A Homogeneous System And Its Adsorption Behavior Of Metal Ions In Aqueous Solution, Thien Do Truong, Tuyen Nguyen Van, Nhi Tran Thi Y Nov 2017

Studies On Chitosan - Benzaldehyde Interaction In A Homogeneous System And Its Adsorption Behavior Of Metal Ions In Aqueous Solution, Thien Do Truong, Tuyen Nguyen Van, Nhi Tran Thi Y

ASEAN Journal on Science and Technology for Development

In this work, N-benzylidene chitosan was synthesized by chitosan –benzaldehyde interaction in a homogeneous system. The modified polymers were characterized by means of infrared (IR) spectra, X-Ray diffraction and thermal analysis. Their adsorption behavior was investigated by atomic absorption spectrophotometry. The experimental results showed that N-benzylidene chitosan had better adsorption properties and higher chemical resistance than that of chitosan.

Go to article

Preservation Of Milks With Addition Of Antibacterial And Aromatic Supplements Produced In Japan, Khusniati Tatik Nov 2017

Preservation Of Milks With Addition Of Antibacterial And Aromatic Supplements Produced In Japan, Khusniati Tatik

ASEAN Journal on Science and Technology for Development

The good antibacterial and aromatic supplements produced in Japan for preservation of milks at storage was investigated. Nineteen sweet and herb materials were made juices as supplements to preserve the milks. Bacterial counts, pH, protease activities and lipase activities of supplemented milks, and antibacterial activities of supplements were detected by total plate counts, glass electrode pH meter, azocasein, modified Dole extraction and turbidity methods. Eleven of nineteen milks added 10% of honey, garlic, ginger, horseradish, “sansho”, “yuzu”, green perilla, “nira”, green tea, bamboo leaf and “yomogi” were selected as good supplemented milks based on pH of these milks closed to …

Go to article

A New Qos Guarantee Sla Based-Scheme For Handoff Calls In Wireless Networks, Phuong Nguyen Cao, Quan Tran Hong, Lee Sang-Ho, Moon Jung-Mo Nov 2017

A New Qos Guarantee Sla Based-Scheme For Handoff Calls In Wireless Networks, Phuong Nguyen Cao, Quan Tran Hong, Lee Sang-Ho, Moon Jung-Mo

ASEAN Journal on Science and Technology for Development

The most important thing is guarantee QoS over wireless infrastructures. The efficient of service level agreement (SLA) is becoming increasingly important to both service providers and customers. This paper presents some traffic control schemes for improving QoS, trafficmodel and performance evaluation are described. We are defining a new scheme for improving handoff call performances in wireless networks, a finite queuing scheme for the handoff calls. SLA measurement calculates the packet delay parameter (PD) of handoff calls. The handoff calls will be accepted into queue if their PD will be smaller than the average waiting time of the queue. Important performance …

Go to article

Gasification Study Of Sarawak Coals, Othman Nor Fadzilah, Bosrooh Mohd Hariffin Nov 2017

Gasification Study Of Sarawak Coals, Othman Nor Fadzilah, Bosrooh Mohd Hariffin

ASEAN Journal on Science and Technology for Development

Thermogravimetry (TG) has been applied in a preliminary investigation, to the gasification of two low rank Sarawak coals. The coal samples, about 10 mg were investigated within the temperature range 30–900°C at different heating rate of 10, 20 and 30°C min-1, under a synthetic air atmosphere for the gasification study. The kinetic parameters were determined using Arrhenius type reaction model assuming a first-order reaction. The reactivity, RT values are fitted with Arrhenius equation at r2 = 0.83 - 0.98 for MP coal, while the RT values for MB coal are fitted with the Arrhenius equation at r2 = 0.99. The …

Go to article

The Effect Of Inner Diaphragms And Non-Continuous Sill Section On The Stiffness Of Automotive B-Pillar, Tan C.F., Shamsuddin S.A., Shafie M.H. Nov 2017

The Effect Of Inner Diaphragms And Non-Continuous Sill Section On The Stiffness Of Automotive B-Pillar, Tan C.F., Shamsuddin S.A., Shafie M.H.

ASEAN Journal on Science and Technology for Development

The paper discusses the knowledge on the behaviour of T-frame under specific loading will be obtained by experimental methods in order to investigate the deflection of the vehicle B-pillar or T-frame. In addition, a series of T-frame were designed with inner diaphragm at various location in the sill member in order to investigate the effect of inner diaphragm and noncontinuous closed hat section in the sill member. Lastly, the results from the experimental tests were compared with the finite element analysis results to demonstrate the effectiveness of the inner diaphragm in the automotive B-pillar.

Go to article

Study On Structure And Crystallization Of Polypropylene Grafted Maleic Anhydride/Nanoclay Composite, Chuong Bui, Hung Dang Viet Nov 2017

Study On Structure And Crystallization Of Polypropylene Grafted Maleic Anhydride/Nanoclay Composite, Chuong Bui, Hung Dang Viet

ASEAN Journal on Science and Technology for Development

Nanocomposite from polypropylene grafted maleic anhydride (PP-g-MA) and nanoclay were prepared by melt proccessing in Brabender extruder. XRD analysis shows the formation of nanostructure (intercalated and exfoliated) of nanocomposite with interlayer space (d-space) increasing from 26.3Å to 30.9Å. These structures, however, do not affect the microcrystalline structure of polymer part of nanocomposite in whole. The study on nonisothermal crystallization shows the development in 3-dimentional direction of crystallites, that means spherulite form of crystalline structure.

Go to article

Arsenic And Copper Uptake By Cabbages Grown On Polluted Soils, Phuong Nguyen Thi Kim, Dung Nguyen Thi Nov 2017

Arsenic And Copper Uptake By Cabbages Grown On Polluted Soils, Phuong Nguyen Thi Kim, Dung Nguyen Thi

ASEAN Journal on Science and Technology for Development

Cabbages (Brassica Juncea (L.) Czern) were grown in pot experiments on typical unpolluted and polluted soils with concentration changing from 20.50 - 50.00 mg As/kg and 156.00 - 413.00 mg Cu/kg dry soil. The results demonstrate the elevation of As and Cu in soil may lead to increased uptake by these cabbages subsequent entry into human food chain. It was found 11.84- 32.12 mg As/kg and 46.86 - 94.47 mg Cu/kg dry leaves. It has tendency increase uptake and accumulation of Cu in cabbage tissue with increasing cultivated time, whereas, it was found accumulation of As in cabbages tissue decreased …

Go to article

Prothrombin-Sepharose-Purified Factor V And Its Role In Prothrombin Conversion, Ong T.C Nov 2017

Prothrombin-Sepharose-Purified Factor V And Its Role In Prothrombin Conversion, Ong T.C

ASEAN Journal on Science and Technology for Development

Bovine Factor V isolated by the method of Esnouf and Jobin (1967) has been further purified by affiniy chromotgraphy through prothrombin-sepharose. Factor V bound quantitative to the prothrombin-sepharose column. There was a 2-fold increase in the average specific activity (260.000 units/mg protein) of the Factor V recovered. Recovery of total Factor V activity and total protein was about 95% and 90% respectively.

Go to article

Fungsi Associated With Ipil-Ipil (Leucaena Leucocephala) (Lam) De With Seeds And Their Control, Quiniones Sebastian S Nov 2017

Fungsi Associated With Ipil-Ipil (Leucaena Leucocephala) (Lam) De With Seeds And Their Control, Quiniones Sebastian S

ASEAN Journal on Science and Technology for Development

Thirteen fungi were isolated from Leucaena seeds from different places in the philipines. These were; Fusarium moniliforme, F. solani, F. semitecctum, Botryodiplodia theobromae, Cephalosporium sp., Phoma sp., Phoma sp., Cladosporiumsp., Chaetomium sp., Chaetomiun sp., Penicilium sp. and Aspergilus flavus. C. graminiculo completely inhibits the germination of seeds once it has colonized the seeds.

Go to article

The Mobilization And Utilization Of Scientific And Technological Human Resources In Developing Countries, Moravscik Michel J Nov 2017

The Mobilization And Utilization Of Scientific And Technological Human Resources In Developing Countries, Moravscik Michel J

ASEAN Journal on Science and Technology for Development

Human resources (henceforth abbreviated as "manpower") in the development and the functioning of science and technology in developing countries is the most crucial ingredient, and forms, most often, the bottleneck in evolution. This is so because it takes an extended period of time (decades) to establish an indigenous scientific and technological manpower of sufficient quality and quantity, and because it is a much more difficult and uncertain undertaking to do so than to asquire sufficient financial resources. For this reason problems related to the generation and utilization of scientific and technological manpower are at the very centre of attantion when …

Go to article

An Overview Of Thermal Analysis Of Polymers, Chan Sze On Dr Hardy Nov 2017

An Overview Of Thermal Analysis Of Polymers, Chan Sze On Dr Hardy

ASEAN Journal on Science and Technology for Development

This article presents an up-to-date overview of the application of thermoanalytical methods in the study of polymers with special focus on thermogravimetry, differential thermal analysis, diferential scening calorimetry and thermomechanical analysis. The working principles behind the variouse thermoanalytical methods together with modes of operation are described. Their usefulness in the characterisation of polymers is cowered comprehensively with examples cited in the litearture. The question of validity of data obtained from thermokinetic studies of polymers is examined and it is felt that the kinetic parameters generated carry little physical meaning about the kinetic of the polymer reaction.

Go to article

Development In The Analytical Gas Chromatography Of Metal Dialkydithiophospate Complexes, Marriot Dr Philip J Nov 2017

Development In The Analytical Gas Chromatography Of Metal Dialkydithiophospate Complexes, Marriot Dr Philip J

ASEAN Journal on Science and Technology for Development

The gas chromotographic analysis of metal-containing compounds has been a small but reasonably active field for about 25 yeras. Analyses cover such as organometalics, metal complexes, and compounds such as hydrides and halides. Reviews of the fiels may be seen in the books by Moshier and Sievers (1), Guichon and Pommier (2) and Crompton (3), as well as the papers by Uden and Henderson (4) abd Rodrigues-Vasquez (5).

Go to article

The Synthesis Of A Novel Bibenzopyran Relied On Electrooxydation Of Malloapelta B By Cyclic Voltammetry, Binh Phan Thi, Ninh Bui Hai, Minh Chau Van, Nam Nguyen Hoai, Huong Le Mai, Kiem Phan Van Nov 2017

The Synthesis Of A Novel Bibenzopyran Relied On Electrooxydation Of Malloapelta B By Cyclic Voltammetry, Binh Phan Thi, Ninh Bui Hai, Minh Chau Van, Nam Nguyen Hoai, Huong Le Mai, Kiem Phan Van

ASEAN Journal on Science and Technology for Development

A novel bibenzopyran named bimalloapelta (1) was synthesized relying on electrooxydation of malloapelta B by cyclic voltammetry in acetonitril adding LiClO4 0.1 M as supporting electrolyte. Its structure determination based on extensive NMR studies and ESI mass spectral measurements. The new compound showed significant cytotoxicity againsts two cancer cell lines as human hepatocellular carcinoma (Hep-2; IC50: 0.46 µg/m) and rhabdosarcoma (RD; IC50: 0.33 µg/m). These results were the same that of malloapelta B (Hep-2, IC50: 0.49 µg/ml and KB, IC50: 0.54 µg/ml).

Go to article

First Prev Next Last