Microbial Degradation Of Endosulfan In Agricultural Soils,
2017
Universiti Brunei Darussalam
Microbial Degradation Of Endosulfan In Agricultural Soils, Ismail B.S., Enoma A.O.S.
ASEAN Journal on Science and Technology for Development
A study of the degradation of endosulfan (6, 7, 8, 9, 10, 10-hexachloro – 1, 5, 5a, 6, 9, 9a –hexahydro – 6, 9- methano – 2, 4, 3 – benzodioxanthiepin 3 – oxide) in Malaysian sandy loam and clay soils was carried out using a radioisotopic technique under laboratory conditions. It was demonstrated that endosulfan possessed long half-lives of 433, 495 and 462 days in aerobic sandy loam, aerobic clay and anaerobic clay soils respectively. Endosulfan degrades faster in non-sterile than in sterile soils. This study indicates that microorganisms are involved in the degradation of endosulfan. In general, degradation …
On The Dense Families In The Relational Datamodel,
2017
Universiti Brunei Darussalam
On The Dense Families In The Relational Datamodel, Duc Thy Vu, Son Nguyen Hoang
ASEAN Journal on Science and Technology for Development
In this paper, dense families of relation schemes are introduced. We characterize minimal keys of relation schemes in terms of dense families. Note that, the dense families of database relations were introduced by Jarvinen [6]. We prove that the set of all minimal keys of a relation scheme s= (U, F) is the transversal hypergraphs of a hypergraph D– {∅}, where Dis any s-dense family. We give a necessary and sufficient condition for an abitrary family to be s-dense family. We also present some dense families of relation schemes. Furthermore, in this paper, we also study antikeys by means of …
Water-Soluble N -Substituted Chitosan Derivatives,
2017
Universiti Brunei Darussalam
Water-Soluble N -Substituted Chitosan Derivatives, Le Dung Ph., Thien D.T., Dong N.T., Nhi T.T.Y., An N.T.
ASEAN Journal on Science and Technology for Development
Many water-solubleN-substituted chitosan derivatives have been prepared having the typical -NH-CH2- linkage. Both the Michael reaction and alkylation with monochloroacetic acid at pH 8- 8.5 offer relatively simple ways for their synthesis.
Development Of Hole Recognition System From Step File,
2017
Universiti Brunei Darussalam
Development Of Hole Recognition System From Step File, Tan C. F., Ismail N., Wong S.V., Sulaiman S., Osman M.R.
ASEAN Journal on Science and Technology for Development
This paper describes the development of Hole Recognition System (HRS) for Computer-Aided Process Planning (CAPP) using a neutral data format produced by CAD system. The geometrical data of holes is retrieved from STandard for the Exchange of Product model data (STEP). Rule-based algorithm is used during recognising process. Current implementation of feature recognition is limited to simple hole feat ures. Test results are presented to demonstrate the capabilities of the feature recognition algorithm.
Marine Natural Products And Their Potential Application In The Future,
2017
Universiti Brunei Darussalam
Marine Natural Products And Their Potential Application In The Future, Van Minh Chau, Van Kiem Phan, Hai Dang Nguyen
ASEAN Journal on Science and Technology for Development
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Black And White Lahar As Inorganic Support For The Immobilization Of Yeast Invertase,
2017
Universiti Brunei Darussalam
Black And White Lahar As Inorganic Support For The Immobilization Of Yeast Invertase, C. Sabularse Veronica, T. Tud Mayrene, Lacsamana Marivic S., Solivas Josefina L.
ASEAN Journal on Science and Technology for Development
Volcanic ejecta or lahar can serve as an inorganic support for the immobilization of invertase. Pampanga and Bicol lahar samples were pretreated by ignition at 550oC for 5 hrs followed by concentrated hydrochloric acid treatment, activatedby reaction with aminopropyltriethoxysilane (APTS) and then covalently bound to invertase using glutaraldehyde as linker. Chemical tests confirmed the attachment of APTS to lahar and glutaraldehyde to silanized lahar. The quantity of immobilized invertase on Pampanga white, Pampanga black and Bicol black lahar were 98.73%, 96.73% and 84.27%,respectively. Conditions for maximum activity of invertase immobilized on Pampanga white lahar were pH 3.5, 45oC and 0.3 …
Recycled Pet For Rice Husk/Polyester Composites,
2017
Universiti Brunei Darussalam
Recycled Pet For Rice Husk/Polyester Composites, Ahmad I., Abu Bakar D. R., Mokhilas S. N., Ramli A
ASEAN Journal on Science and Technology for Development
Rice husks were combined with unsaturated polyester resin, synthesized from glycolysed product of poly (ethylene terephthalate) (PET) waste to form rice husk (RH)/polyester composites. PET from post-consumer soft drink bottles was recycled through glycolysis, followed by polyesterified with maleic anhydride and then cross-linked with styrene to producea formulation for the resin. Characterizations of the synthesized resin were performed byhydroxyl, acid values and Fourier Transform InfraRed (FTIR) techniques. The effect of filler loading and surface modification of rice husks on the mechanical properties of the composites were also investigated. It has been observed that the increasing filler loading resulted in reduction …
Photocatalytic Removal Of Tr I- And Hexa-Valent Chromium Ions From Chrome-Electropl Ating Wastewater,
2017
Universiti Brunei Darussalam
Photocatalytic Removal Of Tr I- And Hexa-Valent Chromium Ions From Chrome-Electropl Ating Wastewater, Kajitvichyanukul Puangrat, Changul Chulaluck
ASEAN Journal on Science and Technology for Development
A novel technique based on photocatalysis was applied to eliminate chromium ions, a toxic hazardous environmental pollutant. The photoreduction of each species of chromium (total, hexavalent, and trivalent chromiums) from chrome-electroplating wastewater was investigated using a titanium dioxide suspension under irradiation by a low-pressure mercury lamp. The initial concentration of total chromium was 300 mg/l. The applied conditions were the direct photocatalytic reduction process at pH 3.65 and the indirect photocatalytic reduction with added hole scavengers at the same solution pH. Results from both processes were comparatively discussed. Result show that chromium was not efficiently removed by direct photoreduction. In …
Emergence Of The L Phenotype In Group B Streptococci In The South Of Ireland,
2017
Department of Biological Sciences, Cork Institute of Technology, Rossa Avenue, Bishopstown, Cork, Ireland
Emergence Of The L Phenotype In Group B Streptococci In The South Of Ireland, Katherine Hayes, Lesley Cotter, L. Barry, Fiona O'Halloran
Department of Biological Sciences Publications
Group B Streptococcal isolates (n = 235) from the South of Ireland were characterised by serotyping, antimicrobial susceptibility and determination of the phenotypic and genotypic mechanisms of resistance. Resistance to erythromycin and clindamycin was observed in 21·3% and 20·4% of the total population, respectively. The c-MLSB phenotype was the most common phenotype detected (62%), with ermB being the predominant genetic determinant, present in 84% of resistant isolates. The rare L phenotype was observed in 2·9% (n = 7) of isolates, four of which harboured the lsaC gene responsible for clindamycin resistance. Serotypes Ia, III and II were the most common …
Optical Properties And Aging Characteristics Of Blackchrme Surface On Different Textures Of Aluminium Substrates,
2017
Universiti Brunei Darussalam
Optical Properties And Aging Characteristics Of Blackchrme Surface On Different Textures Of Aluminium Substrates, Trakulcoo Kanchana, Niemsorn Saowanee, Pitaksenpanich Patcharee
ASEAN Journal on Science and Technology for Development
Optical Properties and Aging Characteristics of Blackchrme Surface on Different Textures of Aluminium Substrates
Optimizing Sperm Collection Procedures In Zebrafish,
2017
University of South Carolina Aiken
Optimizing Sperm Collection Procedures In Zebrafish, Madelyn B. Wasden, Rachel L. Roberts, April Delaurier
Journal of the South Carolina Academy of Science
Zebrafish are a highly-valued model organism used for developmental biology research. Zebrafish can be used for genetic manipulation and hence, many mutant and transgenic lines exist. It is impractical to maintain lines of adult zebrafish, due to resource constraints and the need to continuously produce new generations. Therefore, a practical way to preserve zebrafish lines is to freeze sperm and retrieve lines using in vitro fertilization of fresh eggs. Most existing in vitro protocols used by research labs have a wide variety of fertilization rates (ranging from 0% to >90%). Due to this variability, lines may be at risk of …
Introduction Of Cosmid Phu 52 Into Hup Azospirillum Sp. Bss 8 By Transconjugation And Transformation,
2017
Universiti Brunei Darussalam
Introduction Of Cosmid Phu 52 Into Hup Azospirillum Sp. Bss 8 By Transconjugation And Transformation, Mamaril Juanita C, Ko Elizabeth P, Trinidad Lorele C.
ASEAN Journal on Science and Technology for Development
Introduction of Cosmid pHU 52 Into HUP Azospirillum SP. BSs 8 BY Transconjugation and Transformation
Biogas Plants With Plastic Film Gasholder,
2017
Universiti Brunei Darussalam
Biogas Plants With Plastic Film Gasholder, Tentscher W
ASEAN Journal on Science and Technology for Development
Biogas Plants With Plastic Film Gasholder
Employment Situation In Manufacturing Industry In Asean: A Few Issues,
2017
Universiti Brunei Darussalam
Employment Situation In Manufacturing Industry In Asean: A Few Issues, Chandra M, Satpute Chhaya
ASEAN Journal on Science and Technology for Development
Employment Situation in Manufacturing Industry in Asean: A Few Issues
An Operational System For Mapping Global Solar Radiation From Gms Satellite Data,
2017
Universiti Brunei Darussalam
An Operational System For Mapping Global Solar Radiation From Gms Satellite Data, Sorapipatana Chumnong, Exell R.H.B
ASEAN Journal on Science and Technology for Development
An Operational System For Mapping Global Solar Radiation From GMS Satellite Data
Book Review, Man In The Mangroves: The Socio Economic Situation Of Human Settlements In Mangrove Forest,
2017
Universiti Brunei Darussalam
Book Review, Man In The Mangroves: The Socio Economic Situation Of Human Settlements In Mangrove Forest, Soegiarto Aprilani
ASEAN Journal on Science and Technology for Development
Book Review, Man in the Mangroves: The Socio Economic Situation of Human Settlements in Mangrove Forest
System Enginering - Is It Relevant To Brunei,
2017
Universiti Brunei Darussalam
System Enginering - Is It Relevant To Brunei, Ginige A, Knight J. A
ASEAN Journal on Science and Technology for Development
System Enginering - Is IT Relevant to Brunei
Microbial Halogenation With Specific Reference To Chiloroperoxidase,
2017
Universiti Brunei Darussalam
Microbial Halogenation With Specific Reference To Chiloroperoxidase, Smith D.C, Bult A. T, Holt G, Christy C, Lilly M. D, Rice C
ASEAN Journal on Science and Technology for Development
Microbial Halogenation With Specific Reference to Chiloroperoxidase
Pv Power System Component Characterization And System Simulation,
2017
Universiti Brunei Darussalam
Pv Power System Component Characterization And System Simulation, Lasnier F, Ang T.G, Wang Y. J, Hemasuk T
ASEAN Journal on Science and Technology for Development
PV Power System Component Characterization and System Simulation
Energy Model Of Grain Drying System,
2017
Universiti Brunei Darussalam
Energy Model Of Grain Drying System, Soponronnarit Somchart
ASEAN Journal on Science and Technology for Development
Energy Model of Grain Drying System
