The Schiff_base ligand 2,6_diacetylpyridine_di_(1R)_(-)_fenchone diazine (9) was prepared by heating 2,6_diacetyl_pyridine (7) and fenchone hydrazone (8) in boiling ethanol in the presence of acetic acid as the catalyst for 28 h. Treatment of (9) with [Mo(CO)4(nbd)] or [W(CO)4(nbd)] in benzene at 80 0C gave the tetracarbonylmolybdenum(0) (10) or tetracarbonyltungsten(0) (11). The complexes (10) and (11) showed that the diazine (9) acted as a bidentate chelating ligand bonded through the pyridyl nitrogen and only one of the imino nitrogen donor atoms of the ligand involved in the bonding. However, diazine (9) acted as a planar terdentate N,N,N_donor_ligand when reacted with palladium(II) to give the cationic products of (12), (13) and (15), respectively. Keywords Molybdenum complexes, tungsten complexes, palladium complexes; bidentate- N,N ligand complexes, terdentate-N,N,N ligand complexes, fenchone azine ligand complexes..

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According to the central limit theorem, the distribution of the sample mean is approximately normal if the sample size, n, is sufficiently large, regardless of original data distribution. However there seems to be a difference in opinion on how large n should be. Some books said that n = 25 is sufficient enough while some considered n = 30 to be sufficient. This paper investigates the size of n that would allow us to apply the central limit theorem when samples taken are from a  population. Keywords normal, central limit theorem..

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Phenoxyherbicides, namely 2(3-chlorophenoxy) propionic acid (cloprop) was intercalated into the interlamellae of Zn/Al-layered double hydroxide (LDH) by direct co-precipitation method. Powder x-ray diffraction patterns of the resulting materials show that the interlayer spacing expanded from 8.9 A in the Zn/Al-LDH to 20.5 A in the nanohybrid. This together with FTIR and compositional studies show that cloprop was successfully intercalated into the Zn/Al-layered double hydroxides interlayer for the formation of organic-inorganic nanohybrid. TGA/DTG thermal analysis shows that hybridization of cloprop into the interlayers of Zn/Al-LDH host enhanced the thermal stability of cloprop. Keywords Zn/Al-layered double hydroxide; 2(3-chlorophenoxy)propionic acid; nanohybrid; direct co-precipitation...

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The main purpose of this study is to investigate the impacts of the Malaysian-Based Pictorial Vocabulary Learning Model (MBPVLM) on lower secondary ESL students_ vocabulary learning. The mixed-methods research approach, specifically, the quasiexperimental research design was employed. The instruments used were the Pre-Test, Post-Test, Student Feedback Form and Semi-Structured Interview. Using convenience sampling, 60 Form 2 students from two secondary schools in Penang were selected for the study. 30 students were placed in the Experimental Group and another 30 in the Control Group. The scores gained from both Pre and Post-test were analysed by using descriptive statistics, independent sample t-test and paired sample t-test as quantitative data. The qualitative data from the semi-structured student_s interview was transcribed and analysed by using thematic analysis. The results based on the descriptive statistics depicts the percentage of improvement for experimental and control group .....

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Kajian ini bertujuan untuk menentukan jenis tumbuhan dan media penurasan bagi merawat air kumbahan domestik menggunakan kaedah kolam tanah basah buatan. Kajian ini merupakan penyelidikan ujikaji plot pecahan (Split Plot Design) dengan plot utama terdiri daripada tiga jenis media turasan dan sub-plot 15 tumbuhan air. Setiap rawatan diulang tiga kali. Sampel air kumbahan yang dikaji dalam penyelidikan diperolehi daripada Kolej Harun Aminurrashid, Universiti Pendidikan Sultan Idris. Air kumbahan dialirkan melalui media turasan menerusi pelbagai tanaman dan dibiarkan selama 10 hari. Parameter kualiti air yang diuji iaitu DO, BOD, TSS, pH dan kekeruhan serta diuji pada hari ke lima dan hari ke sepuluh. Hasil kajian mendapati bahawa jenis medium penurasan yang diperbuat daripada kerikil, pasir, dan arang kayu menunjukkan kesan terbaik dengan menurunkan kekeruhan (86.5%), TSS (99%) dan BOD (35%), serta mampu menaikkan pH air daripada 4.44 kepada 6.33. Terdapat enam tumbuhan yang dikenalpasti .....

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Kajian kualitatif kes tunggal ini bertujuan meneroka amalan interaksi sosial pengajaran guru aliran perdana dalam Pendidikan Inklusif. Justeru, kajian ini dijalankan untuk meneroka amalan interaksi sosial pengajaran guru aliran perdana dalam Pendidikan Inklusif menerusi tiga persoalan utama iaitu: (1) Bagaimanakah kesediaan interaksi sosial dalam pengajaran guru aliran perdana menerusi Pendidikan Inklusif di sekolah menengah? (2) Apakah cabaran yang mempengaruhi amalan interaksi sosial dalam pengajaran guru aliran perdana menerusi Pendidikan Inklusif di sekolah menengah? dan (3) Bagaimanakah strategi untuk menangani cabaran interaksi sosial dalam pengajaran guru aliran perdana menerusi Pendidikan Inklusif di sekolah menengah? Kajian dijalankan di sebuah sekolah menengah di Selangor melibatkan sepuluh orang peserta kajian menggunakan instrumen protokol temu bual, senarai semak pemerhatian dan senarai semak analisis dokumen. Sebanyak 10 kali sesi temu bual dan 30 sesi pemerhatian dilaksa.....

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This creative work dissertation focuses on the performer as a co-creator in perfoming selected Chinese art songs based on its classical poetry by integrating Bel Canto singing techniques. By reviewing literature and performances, there were problems with performers' unclear pronunciation and inability to accurately express the charm when the singer use Bel Canto singing techniques. There are two objectives. The first objective leads to two sub-objectives. The first sub-objective is to compare the similarities and differences between Italian and Chinese in Bel Canto singing, and the second sub-objective is to apply the techniques of Yi Zi Xing Qiang and Run Qiang to perform Chinese art songs based on its classical poetry. The second objective is to perform the selected repertoire. This creative work dissertation is based on practice-led research, with the practice process as the research process and the results presented in the form of two recitals. The results suggest that the author a.....

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Kajian faktor kemahiran metakognitif yang terdiri daripada kemahiran memantau, kemahiran menilai, dan kemahiran mengawalatur dilakukan kepada 317 orang pelajar yang mengambil kursus B2001 Matematik Kejuruteraan di Politeknik Kuching Sarawak. Instrumen kajian terdiri daripada soal selidik yang mengandungi 24 item berskala Likert 4 mata. Hasil kajian telah mendapati bahawa pelajar mempunyai tahap metakognitif yang memuaskan dengan min keseluruhan 3.17. Min bagi ketiga-tiga kemahiran memantau, menilai, dan mengawalatur masing-masing adalah 3.20, 3.14 dan 3.18. Dapatan kajian menunjukkan bahawa tiada perbezaan yang signifikan dalam tahap kemahiran metakognitif mengikut jantina dan peringkat pengajian. Dapatan menunjukkan kemahiran metakognitif yang paling kurang dipraktikkan adalah (1) Menyemak semula jawapan yang diberi, (2) Menilai masa yang diperuntukkan untuk setiap soalan Matematik, dan (3) Bertanya pada diri sama ada sesuatu maklumat diperlukan. Analisis juga mendapati pelajar lebih .....

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This article provides an accurate detail of the life history of the bagworms Pteroma pendula (P. pendula) and Metisa plana (M. plana) on oil palm. P. pendula was confirmed to possess four larval stages with no difference in the number of instars and pupal development time between the sexes. Life history of M. plana followed reported by earlier workers of 5-6 larval instars for males and 6-7 for females were used. There was, however, no difference in pupal developmental time and size. Sex ratio for both species was nevertheless 1:1 and more representative rm and _ values were obtained. The last two statistics were nevertheless superior for P. pendula and insects bred in the field. The rm for P. pendula was 0.06459 in the laboratory and 0.07327 in the field while the _ was 1.06672 in the laboratory and 1.07603 in the field; cf the rm. M. plana was 0.04783 in the laboratory and 0.06061 in the field while the _ was 1.04899 in the laboratory and 1.06248 in the field. M. plana clearly had th.....

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This study investigates the effect of safety management practices on safety performance in ADNOC in the United Arab Emirates, focusing on the mediating effects of ethical workplace climate and safety culture. Using a quantitative survey research design, a 48- item closed-ended questionnaire with proven reliability and validity was employed. A sample of 357 individuals was selected through simple random sampling participants from the ADNOC employee population. The data were analyzed using Partial Least Squares Structural Equation Modeling. Findings revealed that ethical leadership significantly affects ethical workplace climate (_ = 0.266, p < 0.001), safety culture (_ = 0.359, p < 0.001), and safety performance (_ = 0.124, p < 0.001). Employee engagement significantly impacts ethical workplace climate (_ = 0.357, p < 0.01), safety culture (_ = 0.226, p < 0.01), and safety performance (_ = 0.132, p < 0.05). Effective communication influences ethical workplace climate (_ = 0.132, p < 0.0.....

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