Uda Hashim, Prof. Ts. Dr.This page provides access to scholarly publications by UniMAP Faculty members and researchers.http://dspace.unimap.edu.my:80/xmlui/handle/123456789/190402024-03-28T12:40:50Z2024-03-28T12:40:50ZPreliminary Studies on Antimicrobial Activity of Extracts from Aloe Vera Leaf, Citrus Hystrix Leaf, Zingiber Officinale and Sabah Snake Grass Against Bacillus SubtilisMuhammad Nur Aiman, UdaSubash C.B., GopinathNur Hulwani, IbrahimMohd Khairul Rabani, HashimNuradibah, Mohd AmerMidhat Nabil, Ahmad SalimiTan, Ewe ShenOng, Yee FenMaisara Azad, Mat AkhirUda, Hashimhttp://dspace.unimap.edu.my:80/xmlui/handle/123456789/692162020-12-31T07:02:11Z2018-01-01T00:00:00ZPreliminary Studies on Antimicrobial Activity of Extracts from Aloe Vera Leaf, Citrus Hystrix Leaf, Zingiber Officinale and Sabah Snake Grass Against Bacillus Subtilis
Muhammad Nur Aiman, Uda; Subash C.B., Gopinath; Nur Hulwani, Ibrahim; Mohd Khairul Rabani, Hashim; Nuradibah, Mohd Amer; Midhat Nabil, Ahmad Salimi; Tan, Ewe Shen; Ong, Yee Fen; Maisara Azad, Mat Akhir; Uda, Hashim
Herbal plants have several potential antimicrobial activities either as antifungal or antibacterial to fight against the disease and pathogen that attack the plants. The extractions of the Aloe vera leaf, Citrus hystrix leaf, Zingiber officinale rhizome and Sabah snake grass were selected in this study to fight against Bacillus subtilis. B. subtilis is a Gram-positive bacterium, rodshaped and catalase-positive that lives on decayed organic material. It is known as Gram-positive bacteria because of its thick peptidoglycan and would appear purple when subjected to Gram test. This species is commonly found in the upper layers of the soil, in meat or vegetables, in pastry, cooked meat, in bread or poultry products. The extracts of Sabah Snake Grass found to be most effective than A.vera leaf, Z. officinale, and C. hystrix against the B. subtilis.
Link to publisher's homepage at https://www.matec-conferences.org/
2018-01-01T00:00:00ZMercaptopropyltriethoxysilane (MPTES) Concentration Effect on Selectivity and Electrical Response of NanostructureAmmar B., MosbahTijjani, AdamMohammed, MohammedOmar S., DahhamUda, HashimNik Noriman, Zulkeplihttp://dspace.unimap.edu.my:80/xmlui/handle/123456789/689972020-12-14T07:24:52Z2018-01-01T00:00:00ZMercaptopropyltriethoxysilane (MPTES) Concentration Effect on Selectivity and Electrical Response of Nanostructure
Ammar B., Mosbah; Tijjani, Adam; Mohammed, Mohammed; Omar S., Dahham; Uda, Hashim; Nik Noriman, Zulkepli
The surface modification by on Mercaptopropyltriethoxysilane (MPTES) done to enhance electrical behavior of nano-IDE -based sensor, silicon based active area was coated with MPTES. The electrical properties of modified nano-IDE were tested using impedance analyser by observing the changes in impedance with the frequencies There was increase as the concentration of the MPTES increase from 1 to 5%. The electrical conductivity increases as mobility increase with the surface attenuation by the MPTES. This increase in concertation observed increase of the electrical conductivity with carrier mobility increment, this indicate
decrease of the Si–arsenic bond length, which caused the bandgap to be shortened, likewise, The device behaviour to surface modification was capacitive reactive in natured.
Link to publisher's homepage at https://iopscience.iop.org/
2018-01-01T00:00:00ZArsenic ion Detection via Electron Chemical Reaction Mechanism Based on Interdigitated Electrode (IDE)Mosbah, Ammar B.Tijjani, AdamMohammed, MohammedOmar S., DahhamUda, HashimNik Noriman, Zulkeplihttp://dspace.unimap.edu.my:80/xmlui/handle/123456789/689962020-12-14T07:24:28Z2018-01-01T00:00:00ZArsenic ion Detection via Electron Chemical Reaction Mechanism Based on Interdigitated Electrode (IDE)
Mosbah, Ammar B.; Tijjani, Adam; Mohammed, Mohammed; Omar S., Dahham; Uda, Hashim; Nik Noriman, Zulkepli
In recent days, both raw and treated water being consumed by human and animal posed serious threat to the consumer. Due to heavy industrialization water easily carries heavy metals that are harmful to consumers. Heavy metal is from metal or metalloid which found in environmental surroundings that has its potential toxicity. Most case, it is taken undetected due to absences of able sensor to detect it. Thus, this study posed to design and characterize nano interdigitated electrode (Nano-IDE) surface modified using Mercaptopropyltriethoxy silane (MPTES) to create binding chemistry for the enhancement of electrochemical activities that
will allow specific and selective detection of arsenic ions in water. This result of the study has shown the potential of the proposed device
Link to publisher's homepage at https://iopscience.iop.org/
2018-01-01T00:00:00ZDesign, Fabrication and Characterization of silicon Nanostructures for Lead (Pb+ ) ion detectionNuri A.KH., EhfaedTijjani, AdamMohammed, MohammedOmar S., DahhamUda, HashimNik Noriman, ZulkepliAlmahdi R., Rabiahttp://dspace.unimap.edu.my:80/xmlui/handle/123456789/689942020-12-14T07:21:55Z2018-01-01T00:00:00ZDesign, Fabrication and Characterization of silicon Nanostructures for Lead (Pb+ ) ion detection
Nuri A.KH., Ehfaed; Tijjani, Adam; Mohammed, Mohammed; Omar S., Dahham; Uda, Hashim; Nik Noriman, Zulkepli; Almahdi R., Rabia
Silicon nanostructure were prepared using cheap and in-house technique developed in INEE. Amino-functionalized Si nanowires were tested against heavy metal lead (Pb). The device was fabricated via dry oxide etching approach with control oxygen flow rate in oxidation furnace, network of uniform Si nanowires was successfully fabricated. The device was functionalized by (3-
aminopropyl) triethoxysilane (APTES) to save as a sensor to heavy metal. Due to the silicon electrochemical response toward heavy metal ions, linear response to three different sources of water were observed. The results indicated, Pb can be detected with high precision. Furthermore, confirmation was demonstrated using atomic absorption spectroscopy instrument (AAS) to
determine the level lead content in each water source. Three sources of water were tested: Tab water (H2O), River (H2O), DI (H2O) and 0.0859mg/L, 0.0929mg/L, 0.023 mg/L with ~ 52pA, 60pA and 70pA current response respectively. Thus, with this high capability to discriminate water samples, the sensor potential to be employed for an effective heavy metals detection and can
further be extended for large sensor network in water treatment plant.
Link to publisher's homepage at https://iopscience.iop.org/
2018-01-01T00:00:00Z