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Articles by Abdul Wahab
Total Records ( 2 ) for Abdul Wahab
  Abdul Wahab , Ejaz Ahmed , Sarfraz Ahmad Nawaz , Ahsan Sharif , Rizwan Ul Haq , Abdul Malik , Muhammad Iqbal Choudhary and Mohsin Raza
  Haloxylon recurvum Bunge ex Boiss (Chenopodiaceae) is distributed chiefly from the Mediterranean region to Central and South Asia and traditionally applied externally for a variety of disorders. We investigated the in vivo toxic potential of crude methanolic extract of the whole plant and its n-hexane, chloroform, butanol, ethylacetate and aqueous soluble fractions by determining their acute toxicity and acute neurotoxicity in mice using Lorke`s method and inverted screen test. In vitro studies were also conducted in order to investigate its antilipoxygenase, antibacterial and antifungal activities. All the fractions showed a narrow margin of safety in mice, except the aqueous fraction, which did not produce any mortality even at the highest tested dose (5000 mg kg-1). At non-lethal doses, only the aqueous fraction (TD50 1264 mg kg-1) was found to produce neurotoxicity in mice. In in vitro lipoxygenase inhibition assay, the ethylacetate fraction showed the most significant inhibitory activity. Crude methanolic extract and its butanol soluble fraction showed the most potent antifungal and antibacterial activity for all the materials tested. Thus, this report verifies the traditionally reported toxicity of this plant, as the majority of its components have exhibited a narrow margin of safety, however, they have been found active in in vitro studies, therefore, further studies are required in order to isolate the most active toxic compounds and differentiate them from these fractions.
  Norhaslinda Kamaruddin , Abdul Wahab , Muhammad Jaliluddin Mazlan and Norul Ayny Norzilan
  Culture refers to the cumulative knowledge, beliefs, values and concepts that are accepted by a group of people. Such information are shared and inherited from the previous generations in order for one to be blended and accepted in a society. Different cultural groups communicate differently that is distinct and unique making homogeneous interpretation of underlying emotional contents are more accurate. However, universality of cultural-influenced speech can be observed when cross cultural speeches are being interacted from different cultural groups to one another especially with the advancement of communication technology. In this study, two different cultural-influenced speech datasets representing American (NTU-American) and European (Netherland EmoSpeech) are employed to investigate their similarity and dissimilarity in term of heterogeneous listener’s perception on the underlying emotional contents. The Mel Frequency Cepstral Coefficient (MFCC) feature extraction method and Multi Layer Perceptron (MLP) classifier are coupled to determine four different emotions, namely; anger, happiness, sadness and neutral acting as emotionless state. From the experimental result, it is noted that the proposed approach yielded accuracy performance of two times better than chance guessing. Moreover, the Netherland EmoSpeech dataset managed to obtain comparative accuracy with the established NTU-American dataset demonstrating that the data is satisfactory for speech emotion recognition purposes.
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