This research aimed to study the role and the stabilization mechanism of hybrid photocatalyst comprising surfactant-exfoliated graphene oxide (sEGO) with zinc oxide (ZnO) for methylene blue (MB) removal. Graphite sheet was exfoliated to produce sEGO by employing synthesized triple chain anionic surfactant, sodium 1,4- bis(neopentyloxy)-3-(neopentylcarbonyl)-1,4-dioxobutane-2-sulfonate (TC14) and compared with commercially available sodium dodecyl sulphate (SDS). The structure, interfacial and colloidal stability of surfactant were studied using proton nuclear magnetic resonance (1H NMR) spectroscopy, air-water (a/w) surface tension and zeta potential measurement. The morphology of photocatalyst were characterized using Field emission scanning electron microscopy (FESEM), Raman spectroscopy, Highresolution transmission electron microscopy (HRTEM), X-ray diffraction (XRD) and thermogravimetric analysis (TGA). The performance of photocatalyst for MB removal were measured through ultraviol.....

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Kajian ini bertujuan membangunkan dan menilai tahap penerimaan aktiviti pembelajaran Gerakan Luncuran (Projectile Motion Learning-ProMIL untuk pelajar Program Matrikulasi. ProMIL telah dibangunkan menggunakan model ADDIE. Kesahan ProMIL pula disahkan oleh empat pakar ditentukan melalui indeks kesahan kandungan (Content Validity Index _ CVI) dengan nilai keseluruhan indeks kesahan kandungan ProMIL adalah tinggi iaitu 1.0 bagi kedua-dua nilai CVI bagi item (I-CVI) dan CVI bagi skala (S-CVI). Sampel kajian terdiri daripada 140 orang pelajar yang dipilih melalui persampelan rawak kluster populasi Modul II Sistem Empat Semester. Instrumen soal selidik penerimaan diadaptasi daripada Technology Acceptance Model (TAM). Data dianalisis menggunakan statistik deskriptif dan inferensi. Hasil daripada analisis soal selidik penerimaan pelajar terhadap ProMIL melalui statistik deskriptif menunjukkan pencapaian tahap peratusan persetujuan yang tinggi iaitu melebihi 90% dengan min dan sisihan piawai ba.....

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The aim of this study was to analyse the dynamic relationship between selected macroeconomic variables on the bilateral exchange rate of Malaysia with its neighbouring countries. The macroeconomic variables used are export, import, inflation, interest rate and gross domestic product. The time series data used in this study is starting January 2014 until December 2021. Method of analysis used in this study Autoregressive Distributed Lag (ARDL) to determine the effects and relationships of bilateral exchange rate and macroeconomic variables. In this study there are two bilateral exchange rates consisting of Malaysia-Singapore exchange rate (MSER) and Malaysia-Thailand exchange rate (MTER). This study compares three models that differ in time span, namely the full model (2014-2021), regime 1 before health crisis; (2014-2018), and regime 2 during health crisis; (2019-2021). The results show that in the full model MSER, inflation significantly impact exchange rate, except for the export, im.....

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