Adilah Ayoib
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Preferred name
Adilah Ayoib
Official Name
Ayoib, Adilah
Alternative Name
Ayoib, Adilah
Ayoib, A.
Main Affiliation
Scopus Author ID
57186613000
Researcher ID
GWV-4156-2022

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  • Publication
    Cost-effective fabrication of polydimethylsiloxane (PDMS) microfluidics for point-of-care application
    ( 2024-06)
    Adilah Ayoib
    ;
    Noor Amalina Aini Abdul Karim
    ;
    Uda Hashim
    ;
    Shahidah Arina Shamsuddin
    ;
    Siti Fatimah Abd Rahman
    ;
    Mohamad Faris Mohamad Fathil
    ;
    Nor Azizah Parmin
    Microfluidics fabrication pertains to the construction of small-scale devices and systems that manipulate and control small volumes of fluids. This process involves precise engineering and manufacturing procedures aimed at designing and producing these devices, which find applications in healthcare, environmental monitoring, and chemical analysis. The present study showcases an inexpensive approach to fabricate microfluidics channels using PDMS biopolymer and soft lithography technique to achieve laminar fluid flow. Initially, a robust and adhesive mold was created by fabricating a master template using several layers of SU-8 5 and SU-8 2015 negative photoresists. Subsequently, PDMS microfluidics channels were replicated and sealed onto a glass substrate through plasma bonding treatment. High-power microscopy images and profilometer analyses demonstrated successful fabrication with minimal deviation from the initial designs and the fabricated devices (less than 0.07 mm, less than 0.6°). Both the SU-8 master template and PDMS replicate displayed average microchannel height values and surface roughness of 100 μm and 0.26 μm or lower, respectively. Additionally, the fluid test confirmed laminar flow without any leakage post plasma oxidation, indicating the completion of an efficient and cost-effective fabrication process.
      23  1
  • Publication
    High efficiency carry save adder using modified–gate diffusion input technique
    ( 2024-06)
    Teoh Yong Keong
    ;
    Siti Fatimah Abd Rahman
    ;
    Mohamed Fauzi Packeer Mohamed
    ;
    Mohamad Faris Mohamad Fathil
    ;
    Adilah Ayoib
    ;
    Thikra S. Dhahi
    Addition is a fundamental function in the design of a digital system, necessary for applications such as signal processing, arithmetic operations, multiplexers, and control systems. Hence, the digital system’s performance is considerably reliant on the efficiency of the adders. Therefore, designing a 4-bit carry save adder (CSA) that consumes less power, occupies a smaller area, and operates at a higher speed is proposed using the modified–gate diffusion input (MOD–GDI) technique. The primary focus is to reduce the area occupied by decreasing the transistor count as compared with other logic styles (i.e., conventional, and Boolean simplification) for CSA through Cadence Virtuoso simulation based on SilTerra 180 nm technology. Notably, the number of transistors is reduced from 42 in the conventional full adder to 11 in the proposed MOD–GDI design. As a result, the proposed 4-bit CSA with MOD–GDI technique is efficient in improving the speed of addition by reducing the area and power consumption.
      2  25
  • Publication
    Coal-vitamin medium for improved scheme of isolating biosurfactant-producing actinomycetes of rare species from soil samples
    ( 2023-01-01)
    Adilah Ayoib
    ;
    Subash Chandra Bose Gopinath
    ;
    Yahya A.R.M.
    ;
    Zakaria L.
    A simplified scheme for the isolation of biosurfactant-producing actinomycetes from soils was developed using different combinations of pretreatments and selective media supplemented with antifungal agent, cycloheximide (0.1 g/l). Pretreatments using hot air-drying techniques as well as soil suspension in phosphate buffer solution (5 mM, pH 7.0) treated with peptone (6%) at 45 Â°C for 10 min proved to be effectual in decreasing the number of vegetative bacterial cells while preserving many actinomycetes spores. Out of 945 actinomycetes isolates collected from various types of soils, 126 isolates of distinct morphologies were screened for biosurfactant production and 28 isolates were proven positive with 18 from contaminated areas while 10 of the positive isolates were from relatively non-contaminated soils. The combination of coal-vitamin medium, supplemented with antifungal agent, cycloheximide (0.1 g/L), on soil samples treated with peptone (6%) and SDS (0.05%) in 5 mM phosphate buffer, pH 7.0, produced the highest number of actinomycetes isolates recovery. Initial screenings for biosurfactant production using combination of microplate assay, drop collapse method, emulsification activity, and tributyrin agar test were found adequate for copious isolates as these methods also assessed for both low- and high-molecular mass biosurfactant types and worked well for high throughput screening analyses.
      3  25