Zulkifly Abbas

Xiamen University Malaysia

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Co-Authors

Kok Yeow You

University of Technology Malaysia

Ee Meng Cheng

Universiti Malaysia Perlis

Kyung‐Sub Lee

Universiti Tunku Abdul Rahman

Jumiah Hassan

Universiti Putra Malaysia

Raba’ah Syahidah Azis

Universiti Putra Malaysia

Mansor Hashim

Universiti Putra Malaysia

Ismayadi Ismail

Universiti Putra Malaysia

Ahmad Fahad Ahmad

Al-Ayen University

Abubakar Yakubu

Zhejiang University

Mohamad Faiz Zainuddin

Universiti Putra Malaysia

Cooperative Institutions

Universiti Putra Malaysia

203

University of Technology Malaysia

Universiti Malaysia Perlis

Serdang Hospital

Universiti Teknologi Petronas

National University of Malaysia

Universiti Teknologi MARA

Universiti Sains Malaysia

University of Malaya

Malaysian Agricultural Research and Development Institute

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Papers

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Influence of indium substitution and microstructure changes on the magnetic properties evolution of Y3Fe5−xInxO12 (x = 0.0–0.4)

Journal of Materials Science Materials in Electronics (2015)

Rodziah Nazlan Mansor Hashim Idza Riati Ibrahim Fadzidah Mohd Idris Wan Norailiana Wan Ab Rahman

Substitution (logic)

10.1007/s10854-015-2874-x

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Citations (15)

In-situ preparation of CoFe2O4 nanoparticles on eggshell membrane-activated carbon for microwave absorption

Heliyon (2023)

Hassan Soleimani Jemilat Yetunde Yusuf Lee Kean Chuan Hojjatollah Soleimani Mustapha Lutfi bin Sabar

This study explores the potential of using cobalt ferrite (CF) nanoparticles grown in situ on eggshell membranes (ESM) to mitigate the increasing problem of electromagnetic interference (EMI). A simple carbonization process was adopted to synthesize CF nanoparticles on ESM. The study further examines the composites' surface morphology and chemical composition and evaluates their microwave absorption performance (MAP) at X-band frequency. Results showed that the composite of CF and ESM - CESM@CF, exhibited a strong RL peak value of -39.03 mm with an optimal thickness of 1.5 mm. The combination of CF and ESM demonstrates excellent impedance matching and EM wave attenuation. The presence of numerous interfaces, conduction loss from the morphology, interfacial polarisation, and dual influence from both CF and ESM contribute to the high MAP of the composite. CESM@CF composite is projected as an excellent biomass-based nano-composite for EM wave absorption applications.

Reflection loss

Eggshell membrane

10.1016/j.heliyon.2023.e13256

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Citations (7)

Association of Radiation Doses and Cancer Risks from CT Pulmonary Angiography Examinations in Relation to Body Diameter

Diagnostics (2020)

Hanif Haspi Harun Muhammad Khalis Abdul Karim Zulkifly Abbas Mohd Amiruddin Abd Rahman Akmal Sabarudin

In this study, we aimed to estimate the probability of cancer risk induced by CT pulmonary angiography (CTPA) examinations concerning effective body diameter. One hundred patients who underwent CTPA examinations were recruited as subjects from a single institution in Kuala Lumpur. Subjects were categorized based on their effective diameter size, where 19–25, 25–28, and >28 cm categorized as Groups 1, 2, and 3, respectively. The mean value of the body diameter of the subjects was 26.82 ± 3.12 cm, with no significant differences found between male and female subjects. The risk of cancer in breast, lung, and liver organs was 0.009%, 0.007%, and 0.005% respectively. The volume-weighted CT dose index (CTDIvol) was underestimated, whereas the size-specific dose estimates (SSDEs) provided a more accurate description of the radiation dose and the risk of cancer. CTPA examinations are considered safe but it is essential to implement a protocol optimized following the As Low as Reasonably Achievable (ALARA) principle.

Pulmonary cancer

10.3390/diagnostics10090681

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Citations (22)

Legendre Multi-wavelets Direct Method for Solving Fredholm Integral Equations of the Second Kind

Zulkifly Abbas S. Vahdati M. Ghasemi

In this paper,We use the continuous Legendre multi-wavelets on the interval [0, 1) to solve Fredholm integral equations of the second kind. To do so, we reduced the solution of Fredholm integral equation to the solution of algebraic equations. Illustrative examples are included to show the high accuracy of the estimation, and to demonstrate validity and applicability of the technique.

Legendre wavelet

Fredholm theory

Algebraic equation

Integral transform

Source

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Citations (1)

The influence of iterative reconstruction level on image quality and radiation dose in CT pulmonary angiography examinations

Radiation Physics and Chemistry (2020)

Hanif Haspi Harun Muhammad Khalis Abdul Karim Zulkifly Abbas Akmal Sabarudin Sarawana Chelwan Muniandy

Pulmonary angiography

Contrast-to-noise ratio

Image noise

Computed Tomography Angiography

Figure of Merit

10.1016/j.radphyschem.2020.108989

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Citations (7)

The Role of Pelvic Node Irradiation in Node Positive Prostate Cancer; the Norfolk and Norwich University Hospital (NNUH) Experience 2011–2015

Clinical Oncology (2020)

Dana Shor M. Smith Zulkifly Abbas R.J. Wade Gaurav Kapur

10.1016/j.clon.2020.01.022

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Citations (0)

A Simple Procedure to Determine Complex Permittivity of Moist Materials Using Standard Commercial Coaxial Sensor

Measurement Science Review (2011)

Muhammad Noor Hazwan Jusoh Zulkifly Abbas Jumiah Hassan Bayu Azmi Adeel Ahmad

A simple procedure was developed to determine complex permittivity of moist materials for known percentage of moisture content at any frequency based using a standard commercial coaxial sensor. Polynomial fitting and Gaussian elimination method were applied to obtain a single equation of complex permittivity as a function of frequency and moisture content. The empirical equation was tested for new samples and was found to have mean error percentage of 5.14 % and 10.22 % for dielectric constant and loss factor, respectively, when compared to a commercial probe.

Coaxial

10.2478/v10048-011-0003-4

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Citations (18)

Low Cost and Simple Procedure to Determine Water Turbidity with Image Processing

Farah Najihah Hamidi Mohamad Faiz Zainuddin Zulkifly Abbas Ahmad Fahad Ahmad

This paper demonstrates a simple and cost effective procedure to measure water turbidity with image processing. Water samples were first placed inside a dark cabin before digital images of the samples were captured with smartphone camera. The red, blue and green (RGB) images were processed to obtain greyscale images, which later converted to mean greyscale index (MGI). A total of 27 formazine samples were prepared and tested to develop a calibration equation relating MGI and nephelometry turbidity unit (NTU) with regression value of R2 = 0.96. This procedure is only valid for the range of turbidity between 0 and 100 NTU. The total cost of this procedure, excluding the smartphone, was only RM16.20 which is much less than the cost of commercial turbidimeters and other proposed cost-effective counterparts.

Turbidity

RGB color model

Gamma correction

Nephelometry

Digital camera

10.1145/3132300.3132302

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Citations (13)

RDWG technique of determination of moisture content in Oil Palm Fruits

The European Physical Journal Applied Physics (2007)

Zulkifly Abbas Rosmiza Mokhtar Khalisanni Khalid Mansor Hashim Samsuzana Abd Aziz

Both the reflection and transmission coefficients of oil palm fruits of various moisture contents have been measured using a rectangular dielectric waveguide (RDWG) technique in the frequency range between 8 GHz and 12 GHz. Good agreement between predicted and measured values of reflection coefficient suggests the potential of RDWG technique as a new, fast and accurate method for the determination of moisture content in oil palm fruits.

Reflection

Reflection coefficient

10.1051/epjap:2007127

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Citations (14)

Preliminary Investigation on the Total Phenolic Content and Antioxidant Activity of Pineapple Wastes via Microwave- Assisted Extraction at Fixed Microwave Power

DOAJ (DOAJ: Directory of Open Access Journals) (2017)

Nor Halaliza Alias Zulkifly Abbas

Pineapple contains many bioactive compounds and nutraceutical values which are good for human health. Processing pineapple in industries leaves a lot of wastes which can cause serious environmental problems. Pineapple waste is a by-product of the pineapple processing industry and it consists of residual pulp, peels and skin. Studies on the content of phenolic and the antioxidant activities in wastes of fruits have been emerging for the past years due to the concern on sustainable environment. In this study, the phenolic compound was extracted from pineapple wastes (namely skin) by using MAE (Microwave-Assisted Extraction). The aims of the present paper are to determine the phenolic compound and antioxidant activity of pineapple waste and to find the optimum condition at 250 W microwave power by using MAE with the temperature varied at 30 °C, 60 °C, 90 °C and 120 °C. The phenolic content was measured by using the Folin-Ciocalteu reagent. For the antioxidant activity, the analysis was done by using DPPH (2,2’-diphenyl-1-picrylhydrazyl) radical scavenging assay. The optimum condition for the extraction was found at 30 °C using deionised water as a solvent. At this optimum condition, the value of the phenolic content was achieved at the highest value, 206.46 mg GAE/g dry weight whereas the EC50, DPPH value was obtained at the lowest value, 13.65 mg/mL. From this research, it is proved that the pineapple skin is one of the good sources of antioxidant phenolic and serves as the best candidate to be a potential source of natural antioxidant for food and nutraceutical application.

Microwave power

10.3303/cet1756280

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Citations (7)