Displaying publications 1 - 20 of 105 in total

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  1. Abdullah, Z., Halim, Z.I.A., Bakar, M.A.A., Idris, A.M.
    ASM Science Journal, 2009;3(1):39-44.
    MyJurnal
    3-Nitro-2-phenoxypyridine and 3-nitro-2-(4-methyl)phenoxypyridine were obtained when 2-chloro-3-nitropyridine was treated with phenol and p-cresol, respectively. Fluorescence studies were carried out in various solvents, in capped and uncapped conditions and for differing concentrations. Both 3-nitro-2-phenoxypyridine and 3-nitro-2-(4-methyl)phenoxypyridine were fluorescent compounds but 3-Nitro-2-(4-methyl)phenoxypyridine was more fluorescent than 3-nitro-2-phenoxypyridine in all the solvents used. The fluorescence intensity decreased with concentration and time.
  2. Yaacob I, Abdullah ZA
    Asia Pac J Public Health, 1994;7(2):88-91.
    PMID: 7946655 DOI: 10.1177/101053959400700202
    A questionnaire survey on smoking was conducted among 395 medical students (40% males, 60% females) at the School of Medical Sciences, University Sains Malaysia at Kubang Kerian, Kelantan. Thirty-five students (9%), all of them males, were current smokers. Twenty-eight percent of the smokers smoked more than ten cigarettes per day and 88% began smoking before entering the medical school. Social influence and cigarette advertisements were the main reasons given for starting smoking. Both smokers and nonsmokers were adequately informed of the common adverse effects of smoking. Ninety percent of smokers had tried to give up smoking but failed. Among the ex-smokers and nonsmokers, the main reasons given for not smoking was that smoking was useless. Among the female students, one-third felt that cigarette smoking was socially unacceptable among females. This was one of the three main reasons for not smoking. Very few of the students (4.6%) considered that doctors' advice would play an important role in smoking prevention.
  3. Yaacob I, Abdullah ZA
    PMID: 8362301
    A study of the smoking habits and attitudes toward smoking among 120 doctors at the Hospital Universiti Sains Malaysia was conducted between May to August 1991. Eighteen percent of the doctors were smokers, 13% ex-smokers and 69% had never smoked. All the smokers were male and all except one smoked only cigarettes. Three of the 32 female doctors were ex-smokers. Nineteen of the 21 smokers only smoked in areas where they could not be seen by the public. Most doctors (equally among smokers and non-smokers) had first-degree relatives (mostly males) who were smokers and 28% had relative with smoking-related disease. 81% non-smoking and 43% smoking doctors had advised healthy people to stop smoking. 92% non-smoking and 52% smoking doctors support the smoking-ban in the hospital. Seven of the 21 smokers had never attempted to quit smoking.
  4. Abdullah Z, Ng SW
    PMID: 21581025 DOI: 10.1107/S1600536808031243
    The two aromatic systems in the title compound, C(14)H(10)N(2)O, enclose a dihedral angle of 77.9 (1)°, and the C-O-C inter-ring bond angle is 117.6 (1)°.
  5. Abdullah Z, Ng SW
    PMID: 21580970 DOI: 10.1107/S1600536808031954
    The two aromatic rings in the title compound, C(10)H(9)N(3), are aligned at 23.4 (1)° and the bridging C-N-C angle is 128.9 (1)°. In the crystal structure, intermolecular N-H⋯N hydrogen bonds result in a chain motif, the repeat distance of which is half the b axial length of 8.8851 (3) Å.
  6. Shah Bakhtiar N, Abdullah Z, Ng SW
    PMID: 21582442 DOI: 10.1107/S1600536809007697
    In the title compound, C(10)H(7)N(3)O(3), the dihedral angle between the two aromatic rings is 87.5 (1) Å; their ipso-C atoms subtend an angle of 117.4 (1)° at the ether O atom.
  7. Shah Bakhtiar N, Abdullah Z, Ng SW
    PMID: 21583573 DOI: 10.1107/S1600536809026609
    The title compound, C(11)H(10)N(2)O, crystallizes with two mol-ecules in the asymmetric unit. The angle at the ether O atom is widened to 118.13 (15)° [117.89 (16)° for the second mol-ecule in the asymmetric unit]; the six-membered rings subtend a dihedral angle of 84.3 (1)° [87.4 (1)° in the second mol-ecule].
  8. Shah Bakhtiar N, Abdullah Z, Ng SW
    PMID: 21583557 DOI: 10.1107/S1600536809026610
    In the title compound, C(11)H(10)N(2)O, the aromatic rings make a dihedral angle of 76.3 (1)°. The C-O-C angle at the ether atom is widened to 117.79 (9)°.
  9. Shah Bakhtiar N, Abdullah Z, Ng SW
    PMID: 21583556 DOI: 10.1107/S1600536809026580
    In the title compound, C(10)H(9)N(3)O, the organic rings linked to the ether O atom make a dihedral angle of 76.8 (1)° and the C-O-C angle is widened to 119.07 (15)°. In the crystal, adjacent mol-ecules are connected by an N-H⋯N hydrogen bond, generating a chain running parallel to the b axis. The crystal is a non-merohedral twin with a ratio of twin components of 0.508 (3):0.492 (3).
  10. Maizathul Akmam AB, Abdullah Z, Ng SW
    PMID: 21581732 DOI: 10.1107/S1600536808041184
    The two aromatic rings in the title compound, C(10)H(8)ClN(3), open the angle at the planar N atom to 128.00 (12)°. The amino N atom of one mol-ecule forms a hydrogen bond to the 1-N atom of an adjacent pyrimidyl ring, generating a hydrogen-bonded dimer.
  11. Shah Bakhtiar N, Abdullah Z, Ng SW
    PMID: 21581576 DOI: 10.1107/S1600536808041196
    There are two molecules in the asymmetric unit of, C(10)H(8)N(2)O, with dihedral angles between the aromatic ring planes of 75.9 (1) and 79.3 (1)°.
  12. Cheah KSL, Abdullah Z, Xiao M
    Int J Environ Res Public Health, 2022 Sep 16;19(18).
    PMID: 36141967 DOI: 10.3390/ijerph191811697
    Universities across China have set up crisis management teams (CMTS) to deal with the crisis brought on by the COVID-19 pandemic. This study focuses on how the paternalistic leadership practices of a Chinese university CMT influence crisis strategic decisions by managing conflict. These relationships were verified using hierarchical regression analysis on 312 samples from the surveyed university during the pandemic and found the following: benevolent leadership and moral leadership have positive effects on decision quality. However, unlike most studies on paternalistic leadership, in crisis situations, the negative effects of authoritarian leadership disappear under the mediating effect of affective conflict. This means that affective conflict within CMT fully mediates the relationship between authoritarian leadership and decision quality, and partially mediates the relationship between moral leadership and decision quality, while cognitive conflict partially mediates the relationship between benevolent leadership and crisis decision quality. It indicates that a CMT must stimulate and maintain a certain level of cognitive conflict while suppressing affective conflict to achieve high-quality crisis decision-making. This state can be achieved by practicing lower levels of authoritarian leadership and maintaining high levels of moral and benevolent leadership practices.
  13. Abdullah Z, Taip FS, Kamal SMM, Rahman RZA
    Foods, 2020 Aug 26;9(9).
    PMID: 32858797 DOI: 10.3390/foods9091177
    The moisture content of a powder is a parameter crucial to be controlled in order to produce stable products with a long shelf life. Inferential control is the best solution to control the moisture content due to difficulty in measuring this variable online. In this study, fundamental and empirical approaches were used in designing the nonlinear model-based inferential control of moisture content of coconut milk powder that was produced from co-current spray dryer. A one-dimensional model with integration of reaction engineering approach (REA) model was used to represent the dynamic of the spray drying process. The empirical approach, i.e., nonlinear autoregressive with exogenous input (NARX) and neural network, was used to allow fast and accurate prediction of output response in inferential control. Minimal offset (<0.0003 kg/kg) of the responses at various set points indicate high accuracy of the neural network estimator. The nonlinear model-based inferential control was able to provide stable control response at wider process operating conditions and acceptable disturbance rejection. Nevertheless, the performance of the controller depends on the tuning rules used.
  14. Abdullah Z, Putri KYS, Raza SH, Istiyanto SB
    BMC Public Health, 2022 Jan 14;22(1):99.
    PMID: 35031029 DOI: 10.1186/s12889-021-12480-3
    BACKGROUND: THE CONTEXT AND PURPOSE OF THE STUDY: Unhealthy food consumption has raised an alarming situation of obesity among Asian nations and posing serious threats to human health. Recent studies have acknowledged that organic food consumption has been contrariwise associated with obesity. The consumption of healthy food has received research attention in social marketing and several antecedents and consequences have been identified. However, to date, there is a void in literature that how social, individual, and marketing elements together tradeoff in predicting a healthy lifestyle. Thus, the current investigation unfolds the antecedents of healthy foods' adoption in Asia by integrating the brand signaling and theory of planned behavior.

    METHODS: The data of 241 respondents were collected from selected social media Facebook communities through a survey using assessed 42 questions. For this purpose, participants' Facebook accounts were selected from the online healthy communities such as 'Diet Suku Suku Separuh' (469,000 followers), 'Hiking, and Camping around Malaysia' (351,200 followers), and 'Healthy Malaysia' (332 followers). The enumerator also engaged with the online community by liking posts and following health accounts.

    RESULTS: The data was analyzed using PLS (SEM) approach, the outcomes of hypotheses revealed interesting information that health consciousness not significantly predicts the purchase intention of healthy food. All antecedents were significant contributors to the prediction of foods' purchase intentions in this study. However, the findings indicated that no positive relationship exists between brand image identifications and brand credibility identifications, and healthy foods' purchase intentions identifications. The findings also indicated that no positive relationship exists between health consciousness identifications and healthy foods' purchase intentions identifications. Owing to the perilous increase in obesity among the general public in Asia. This study reinforced the factor that can help in the adoption of a healthy lifestyle. The study validated that a healthy lifestyle is reliant on the consumers' health consciousness, environmental concern, and innovativeness through motivating the consumers' healthy foods' purchase intentions. Surprisingly, the results highlighted that respondents have not identified brand image and credibility as an antecedent of purchase intention. Given that organic food brands are somewhat new in Asian markets and therefore, brands must endure crisis marketing practices to improve their brand recognition. Therefore, policymakers must facilitate the food promotional activities that are critical to enhancing the perceived benefits of organic food to combat issues like obesity. This paper offers a foundation for future empirical investigations in Asia and various stakeholders on how to promote a healthy lifestyle in Asia. Specifically, the results will help policymakers to offer positive policies and procedures for the improvement of a healthy lifestyle through the understanding of the antecedents and consequences of health-conscious consumers' healthy foods' purchase intentions.

  15. Al-Mohammed NN, Alias Y, Abdullah Z, Khaledi H
    PMID: 22220033 DOI: 10.1107/S1600536811042528
    The asymmetric unit of the title compound, C(24)H(22)O(4), contains one half-mol-ecule, the other half being generated by a crystallographic center of inversion. The central benzene ring makes a dihedral angle of 72.49 (5)° with the terminal benzene ring. In the crystal, adjacent mol-ecules are linked through C-H⋯O inter-actions, forming a sheet structure parallel to the bc plane. The sheets are stacked along the a axis via π-π inter-actions formed between the terminal benzene rings [centroid-centroid separation = 3.7276 (6) Å].
  16. Al-Mohammed NN, Alias Y, Abdullah Z, Khaledi H
    Acta Crystallogr Sect E Struct Rep Online, 2011 Dec 1;67(Pt 12):o3164.
    PMID: 22199688 DOI: 10.1107/S160053681104565X
    The centroid of the central aromatic ring of the title mol-ecule, C(24)H(22)O(4), is located on an inversion center. The dihedral angle between the central and terminal benzene rings is 75.00 (7)°. In the crystal, mol-ecules are linked through C-H⋯O hydrogen bonds into chains along [121]. The chains are connected into layers via C-H⋯π inter-actions.
  17. Al-Mohammed NN, Alias Y, Abdullah Z, Khaledi H
    Acta Crystallogr Sect E Struct Rep Online, 2011 Dec 1;67(Pt 12):o3140.
    PMID: 22199668 DOI: 10.1107/S1600536811045041
    In the title compound, C(24)H(22)O(4), the centroid of the central benzene ring lies on a special position of 2/m site symmetry, while the terminal aromatic rings are located on a mirror plane. The central and terminal benzene rings are perpendic-ular to each other. In the crystal, the mol-ecules are connected via C-H⋯O hydrogen bonds into a three-dimensional polymeric structure. The network is further consolidated by a C-H⋯π inter-action.
  18. Al-Mohammed NN, Alias Y, Abdullah Z, Khaledi H
    PMID: 22347056 DOI: 10.1107/S1600536812001067
    In the title compound, C(9)H(14)N(2)O(2), the imidazole ring and the acetate O-C=O plane make a dihedral angle of 80.54 (12)°. In the crystal, mol-ecules are connected via pairs of C-H⋯O hydrogen bonds, forming centrosymmetric dimers.
  19. Al-Mohammed NN, Alias Y, Abdullah Z, Khaledi H
    Acta Crystallogr Sect E Struct Rep Online, 2012 Jul 1;68(Pt 7):o1983.
    PMID: 22807816 DOI: 10.1107/S1600536812024324
    The asymmetric unit of the title compound, C(20)H(28)N(2)O(6)S(2), contains one half-mol-ecule, related to the other half by a twofold rotation axis. The two aromatic rings of the mol-ecule make a dihedral angle of 50.91 (7)°. The O-CH(2)-CH(2)-O and N-CH(2)-CH(2)-O fragments both adopt gauche conformations, with torsion angles of 76.0 (4) and 70.4 (3)°, respectively. In the crystal, adjacent mol-ecules are linked through N-H⋯O hydrogen bonds into chains along the a-axis direction. The chains are further connected via C-H⋯O inter-actions into a two-dimensional supra-molecular network in the ac plane.
  20. N Al-Mohammed N, Alias Y, Abdullah Z, Khaledi H
    PMID: 22412488 DOI: 10.1107/S1600536812002814
    In the title compound, C(13)H(16)N(2)O(2), the planes of the benzimidazole ring system and the acetate O-C=O fragment make a dihedral angle of 84.5 (3)°. In the crystal, mol-ecules are connected through C-H⋯N hydrogen bonds to form infinite chains in the [-110] direction.
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