The chemistry of Piper species has been widely investigated and phytochemical investigations conducted in all parts of the world have led to the isolation of a number of physiologically active compounds. Thus, this study was carried out to investigate the phytochemicals from Piper magnibaccum from Malaysia. Fractionation and purification of the leaves led to the isolation and identification of linoleic acid (1), 24S-ethylcholesta-5,22,25-trien-3β-ol (2), oleic acid (3), β-sitosterol (4), cepharadione A (5), piperumbellactam A (6), and stigmast-3,6-dione (7). The structures of these compounds were obtained by analysis of their spectroscopic data, as well as the comparison with that of reported data..

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This study aims to investigate the level of green chemistry knowledge, awareness, and practices among university students. This study also aims to analyze the relationship between green chemistry knowledge and awareness, green chemistry knowledge and practices, and also green chemistry awareness and green chemistry practices. This study employed survey as research design, and data was collected by distributing the questionnaires to 392 university students in Kuala Lumpur and Tanjung Malim by using the 44-questions questionnaire, which consists of 16 multiple-choice questions for green chemistry knowledge construct, and 14 questions which uses 5-point Likert scale questions for green chemistry awareness and practices respectively. Data were analysed descriptively to investigate the level of green chemistry knowledge, awareness and practices. This study has successfully revealed that the level of green chemistry knowledge and practices among university students is high, while the level o.....

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The conjoint method, which is based on fuzzy sets of numbers, is widely used to describe linguistic values for human preference in an uncertain environment. However, the fuzzy sets used to describe the membership function of linguistic value do not realistically represent the physical world, so the conjoint method can fill the gap and produce more meaningful results. The fuzzy numbers conjoint method is used in this paper to analyze the achievement goals of undergraduates in the learning of calculus. One hundred and seven selected Bachelor of Science (Hons) Mathematics and Bachelor of Science (Hons) Actuarial Science students from one public university in Klang Valley, Selangor, participated in this study. The data for this study, which was distributed via Google form, was based on a previous study's Achievement Goals Questionnaire. The fuzzy number conjoint method with similarity measure based on geometric distance, ambiguity, value, area, left and right height were used to c.....

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This study was carried out to identify the level of students’ knowledge and to compare gender perception on the i-Think mind map in Merlimau district, Malacca. A survey design was employed using a five-point Likert Scale structured questionnaire. Respondents were selected using simple random sampling involving 343 forms one to form four students. Descriptive analysis was conducted to find the mean and percentage, while inferential analysis using a two-way ANOVA, t-test to make a comparison between knowledge and perception of the i-Think mind map. This study demonstrated the form four students had the highest knowledge level of 83.72 per cent (excellent) followed by form two and form one with a value of 82.46 per cent (excellent) and 79.49 per cent (good) respectively. The perceptions level among the respondents towards the i-Think mind map was moderately high and uniform (mean value of 3.01 – 4.00). Female students’ knowledge was higher (mean value of 3.66) than male (mean value .....

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Sesi Pengajaran dan Pembelajaran di Rumah (PdPR) memberikan cabaran kepada mata pelajaran Sains kerana mata pelajaran tersebut perlu dipelajari tanpa bergantung kepada guru sepenuhnya. Pembelajaran menggunakan modul merupakan salah satu kaedah PdPR yang boleh dilaksanakan untuk membantu guru bagi mengajar mata pelajaran Sains. Oleh itu, kajian ini dijalankan untuk membangunkan modul pembelajaran WAO bagi topik Penyerapan untuk mata pelajaran Sains Tahun Satu. Pembangunan modul tersebut menggunakan model reka bentuk instruksional ADDIE tetapi kajian ini hanya memfokuskan pembangunan dan penilaian kesahan modul yang terdapat dalam fasa pembangunan. Modul tersebut dibangunkan untuk mengaplikasikan strategi pembelajaran inkuiri berstruktur. Modul pembelajaran WAO yang dibangunkan terdiri daripada tiga unit iaitu Unit 1 (objek menyerap air), Unit 2 (jenis bahan dan keupayaan menyerap air) dan Unit 3 (objek menyerap air dan kehidupan seharian). Dapatan kajian menunjukkan bahawa modul tersebu.....

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Iraqi corporations still perform below expectation and are yet to fully comply with corporate social responsibility disclosure (CSRD) requirements. Past research on corporate governance attributes (CGA) had shown positive effects on CSRD. Thus, this research aims to investigate the effects of CGA, such as board of directors (BOD), audit committee (AC), and ownership structure (OWSR) on the level of CSRD in Iraqi non-financial companies by focusing on the moderating effect of earnings management (EM). CSRD in this study refers to disclosure in environment, product and consumers, community, and human resource. Hypotheses are developed using the multi-theoretical framework, including agency, stakeholder, and legitimacy theories. Data were collected from annual reports of 38 non-financial companies listed on the Iraq Stock Exchange (ISX) from 2016–2019. Panel data regression techniques were carried out, namely fixed effects estimation, random effects estimation, and pooled ordi.....

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Rapport is one of the elements that can be implemented among the students which aims to help them in enhancing their motivation and achievement during their conducted lessons in mathematics. Furthermore, it is needed to analyse critically and synthesize the trend of research and the method used in researching before implementing the rapport element in mathematics subjects in Malaysia. This research has analysed upon four articles related to implementation of rapport element which have been randomly picked from other researchers in Malaysia within a timeframe of 2016 to 2021. The results found that most of the previous researchers tend to choose the quantitative research method which adapted surveys design on collecting data over their research. The samples involved secondary school and high-level education students. Based on the 4 articles that were selected, it was found that there was a study on the effectiveness of the rapport elements in the process of teaching and learning as well.....

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Kajian ini bertujuan untuk membangunkan dan menilai keberkesanan Modul DialogKopitiam terhadap kemahiran mendengar dan bertutur serta motivasi pembelajaran Bahasa Cina Sekolah Kebangsaan (BCSK) dalam kalangan murid Tahun Empat. Modul DialogKopitiam yang dibangunkan adalah berdasarkan Model Morrison, Ross, Kalman dan Kemp (MRKK) 2013. Kajian kuasi eksperimen dengan reka bentuk ujian pra dan ujian pasca telah dijalankan untuk menilai keberkesanan Modul DialogKopitiam terhadap pencapaian dan motivasi. Instrumen yang digunakan ialah Ujian Pencapaian Mendengar (UPD), Ujian Pencapaian Bertutur (UPB), dan Soal Selidik Sistem Motivasi Kendiri B2 (Second Language Motivational Self System, L2MSS). Keputusan ujian-t menunjukkan terdapat perbezaan yang signifikan dalam pencapaian dalam UPD dan UPB. Manakala, keputusan MANOVA pengukuran berulang menunjukkan komponen Ideal Bahasa Kedua Kendiri (Ideal L2 Self, IL2S), Keperluan Bahasa Kedua Kendiri (Ought to L2 Self, OL2S) dan Pengalaman .....

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Tujuan kajian ini adalah untuk menentukan tahap kepuasan dan kesedaran pembelajaran pelajar Ijazah Sarjana Muda Pendidikan Matematik di Universiti Pendidikan Sultan Idris (UPSI) dalam pembelajaran kursus matematik secara atas talian pada tempoh pandemik Covid-19 dan seterusnya untuk menentukan sama ada terdapat hubungan yang signifikan antara tahap kepuasan pembelajaran pelajar dengan tahap kesedaran pembelajaran pelajar. Kajian ini dijalankan dengan menggunakan pendekatan kuantitatif melalui kaedah tinjauan. Instrumen yang digunakan dalam kajian ini adalah satu set soal selidik tahap kepuasan dan kesedaran pembelajaran pelajar secara atas talian. Item kepuasan pembelajaran pelajar terdiri daripada lima konstruk, iaitu pengendalian struktur kursus, penglibatan dan interaksi pelajar, keberadaan tenaga pengajar, dan kepuasan pelajar. Seramai 265 sampel kajian telah dipilih melalui teknik persampelan rawak mudah daripada populasi kajian, iaitu 839 pelajar Ijazah Sarjana Muda Pendidikan Ma.....

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Kajian ini berfokus kepada haptik, proksemiks dan kronemiks yang diperhatikan dalam adat perkahwinan masyarakat Melayu di Perak. Tiga objektif dirangka untuk kajian ini, iaitu untuk mengenal pasti penggunaan haptik, proksemiks dan kronemiks dalam adat perkahwinan Melayu. Objektif kedua pula menganalisis kepentingan ketiga-tiga aspek ini dalam adat perkahwinan tersebut dan objektif ketiga menghuraikan globalisasi dan pengaruh media terhadap haptik, proksemiks dan kronemiks dalam adat perkahwinan Melayu. Kaedah kualitatif dan reka bentuk kajian etnografi diaplikasikan dalam kajian ini. Proses pengutipan data melibatkan tujuh buah majlis perkahwinan di kampung-kampung di pinggir bandar raya Ipoh dan tiga buah hotel di sekitar bandar raya Ipoh. Peralatan audio video digunakan bagi merakam tingkah laku haptik, proksemiks dan kronemik bersamasama catatan lapangan yang dibuat dalam tempoh empat bulan melibatkan lebih 90 jam kajian lapangan. Temu bual bersama 15 orang responden yang.....

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