A natural compound, zerumbone was extracted, isolated and purified from the rhizomes of edible plant Zingiber zerumbet using methanol extraction and Column Chromatography (CC) method. The isolated and purified zerumbone crystals were subjected to High Performance Liquid Chromatography (HPLC), Liquid Chromatography Mass Spectrometry (LCMS) and 13C NMR and 1H NMR analysis to confirm the purity, molecular weight and molecular structure. The study investigated the purified zerumbone crystals for its anti-cancer properties on human cervical cancer cell line (HeLa). Cisplatin, was used as a positive control in this study. The cytotoxicity of zerumbone and cisplatin were investigated using the MTT assay and caspases-3 was estimated with colorimetric assay in zerumbone treated HeLa cells. Morphological analysis showed that there were changes observed on HeLa cancer cells after treatment with zerumbone and cisplatin. The MTT assay results demonstrated that the IC50 value (± SEM) of zerumbone was determined to be 11.3 μM (2.5 μg mL-1) whilst the IC50 value of cisplatin was at 7.5 μM (1.6 μg mL-1). Prominent growth retardation was identified to the HeLa cancer cells, after treatment with both compounds, while caspase-3 was observed to be significantly increased in zerumbone treated cells as compared to untreated control cells. This study showed promising avenues towards zerumbone to be developed as a new chemo-natural drug for treatment of cervical cancer.
The job interview has become a popular topic for research among scholars and is a common format employed by any stake holders, recruitment agencies, companies and institutions. It is also called an assessment to select a suitable candidate for hiring. A common instrument used for the job interview is standard interview questions or semi-structured interview questions internally or locally with the set of common objective. There were several studies conducted by scholars on employment interviews. It was found that three common areas of interest are explored in this paper: (1) comprehending what standardised interviews envisage, (2) investigating how interview concepts can be evaluated, and (3) categorise the candidate and interview components that may impact the interview procedure. It was further found that there are also three equally important factors that require moderate research focus to be incorporated: (1) constructing a general standard and value for the interview format or standard interview questions for fresh graduates and behavioural interview questions for senior positions, (2) focus on the best attributes or personal traits, and (3) reliable explanations, classification and quantification of candidate characteristics and employability skills. It is hope that these approaches can be utilized and contributes in the field of job interviews, especially in Malaysia context which prepare the young generations.
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