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Feng, Tan wei and Raihana Zahirah, Edros and Ngahzaifa, Ab Ghani and Siti Umairah, Mokhtar and Dong, Ruihai (2024) Prediction of blood-brain barrier permeability of compounds by machine learning algorithms. Journal of Advanced Research in Applied Sciences and Engineering Technology, 33 (2). pp. 269-276. ISSN 2462-1943. (Published)

Rahman, Md Shamim and Sri Murugan, Sooriamoorthi and Amni, Nik Adnan and Raihana Zahirah, Edros and Siti Umairah, Mokhtar and Doolanea, Abd Almonem (2024) In-vitro drug release studies of chitosan-alginate nanoparticles loaded with non-volatile extracts of cymbopogon species. International Journal of Chemical and Biochemical Sciences, 25 (15). pp. 373-385. ISSN 2226-9614. (Published)

Mohd Amir Shahlan, Mohd-Aspar and Raihana Zahirah, Edros and Siti Umairah, Mokhtar and Norhidayah, Kamarudin (2023) The roles of acidity, peroxide and non-peroxide compounds in antibacterial properties of Malaysian Kelulut, Tualang and Acacia honey. Malaysian Journal Of Microbiology, 19 (3). pp. 291-300. ISSN 2231-7538. (Published)

Yee, Tong Kong and Viviana, Abdullah and Siti Umairah, Mokhtar and Rajaletchumy, Veloo Kutty (2020) Preliminary studies on extraction of propolis using vitamin E d-ɑ-tocopheryl polyethylene glycol succinate (vitamin E TPGS) and compare their antimicrobial activities. Malaysian Journal Of Microbiology, 16 (5). pp. 346-352. ISSN 2231-7538. (Published)

Siti Umairah, Mokhtar and Ashviny, Murugan and Che Syahira, Che Awang (2020) Formulation of herbal cream based on Ziziphus Mauritiana leaves extract and evaluation on physicochemical properties. International Journal of Engineering Technology And Sciences (IJETS), 8 (1). pp. 34-39. ISSN 2289-697X. (Published)

Siti Umairah, Mokhtar and Kulsing, Chadin and Althakafy, Jalal T. and Kotsos, Alex and Drummer, O. H. and Marriott, P. J. (2020) Simultaneous analysis of drugs in forensic cases by liquid chromatography-high-resolution Orbitrap Mass Spectrometry. Chromatographia, 83 (1). pp. 53-64. ISSN 0009-5893. (Published)

Siti Umairah, Mokhtar and Kulsing, Chadin and Althakafy, Jalal T. and Kotsos, Alex and Drummer, O. H. and Marriott, P. J. (2020) Simultaneous analysis of drugs in forensic cases by liquid chromatography–high‑resolution orbitrap mass spectrometry. Chromatographia, 83 (1). pp. 53-64. ISSN 0009-5893. (Published)

Siti Umairah, Mokhtar and Hooi, H'ng S. and Lene, Darlene T and Jayaraman, S. (2019) Comparison of total phenolic and flavonoids contents in Malaysian propolis extract with two different extraction solvents. International Journal of Engineering Technology And Sciences (IJETS), 6 (2). pp. 1-11. ISSN 2289-697X (Print); 2462-1269 (Online). (Published)

Siti Umairah, Mokhtar and Chin, S. -T. and Kee, C. L. and Low, M. Y. and Drummer, O. H. and Marriott, P. J. (2016) Rapid Determination of Sildenafil and Its Analogues in Dietary Supplements Using Gas Chromatography-Triple Quadrupole Mass Spectrometry. Journal of Pharmaceutical and Biomedical Analysis, 121. pp. 188-196. ISSN 0731-7085. (Published)

Siti Umairah, Mokhtar and Chin, S.-T. and Vijayaraghavan, R. and MacFarlane, D. R. and Drummer, O. H. and Marriott, P. J. (2015) Direct Ionic Liquid Extractant Injection for Volatile Chemical Analysis - A Gas Chromatography Sampling Technique. Green Chemistry, 17 (1). pp. 573-581. ISSN 1463-9270. (Published)

Siti Umairah , Mokhtar (2011) Application of dispersive liquid-liquid microextraction based on solidification of floating organic droplet in the analysis of anti-depressant drugs. Masters thesis, Universiti Teknologi Malaysia (Contributors, UNSPECIFIED: UNSPECIFIED).

Mohd Marsin, Sanagi and Siti Umairah, Mokhtar and Maizatul Akmam, Miskam and Wan Aini, Wan Ibrahim Determination of organophosphorus pesticides by dispersive liquid-liquid microextraction coupled with gas chromatography-electron capture detection. The Malaysian Journal of Analytical Sciences, 15 (2). pp. 232-239. ISSN 1394-2506. (Published)