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2781

Chemical diversity of indole alkaloids from Malaysian Kopsia species (Apocynaceae) and their biological activities

Abstract

The genus Kopsia, which belongs to the family Apocynaceae, has been used extensively in traditional treatment. This mini-review provides a comprehensive analysis of the chemical diversity of indole alkaloids from Malaysian Kopsia species and their biological activities. Fourteen species with 164 indole alkaloids have already been studied and successfully isolated and characterised. Most of them are categorised as aspidofractinine, aspidospermane and eburnane types. The literature and references for this manuscript were obtained from various sources including SciFinder®, Reaxys®, ScienceDirect®, PubMed Central®, NIH National Library of Medicine, Google Scholar and The Plant List®. Keywords: Apocynacae, Kopsia, indole alkaloids, aspidofractinine, aspidospermane, eburnane..

Article Published 2024 565 hits Available

2782

Chemical constituents of Loranthaceae (Mistletoes): a review

Kamal Ja’afar Muhammad

Abstract

This article review is designed to bring some updates on the phytochemistry of the Loranthaceae family in order to throw more light on future research priorities. Loranthaceae family is the leading pantropical semi parasitic shrubs generally termed mistletoe. They consist of about 75 genera and 1000 species growing in many countries of Africa, Asia, Australia, Europe, South America and New Zealand with diverse widespread uses in adornment, food and medication. The literatures for this review was collected from various online databases: Google Scholar, PubMed, Research gate, Science Direct, Scopus and web of Science for nine genera namely, Globimetula, Scurrula, Dendrophtoe, Loranthus, Phragmanthera, Tapinanthus, Taxillus, Tripodanthus and Viscum based on the type of phytochemicals, popularity and environmental setting. Chemical studies of the Loranthaceae species have produced a number of important phytochemicals belonging to different classes. The recent investigations led to the disc.....

Article Published 2024 818 hits Available

2783

Bibliometric analysis of global research trends on llant extract in antidiabetic research

Ulfah

Abstract

Natural products have been found to have antidiabetic effects in a growing number of studies, making them a popular topic in antidiabetic research. This paper sought to examine the present state of plant extract research and provide emerging trends in the field through bibliometric analysis based on publication outputs, co-authorships between authors and affiliated nations, and co-occurrences of author keywords. Research papers on natural remedies for diabetes were taken from the Scopus core collection database. The studies were analyzed and plotted using VOSviewer. According to the results, there has been a consistent rise in the total number of publications since 2008, with an increase of 50 articles every two years. This pattern has continued to this day. The findings of this investigation indicate that 2190 records of plant extract in antidiabetic research were published between 1989 and 2022. Researchers in India accounted for over 30% of all publications published worldwide. Addi.....

Article Published 2024 608 hits Available

2784

Assessing the profile of glyphosate residues in maize grains sold in the federal capital territory Abuja, Nigeria

Akinyemi, Fagbohun Adebisi

Abstract

The profile of glyphosate (GLY) residues in maize grains sold in the Federal Capital Territory Abuja (FCT), Nigeria, was assessed. Twenty-six maize grain samples of yellow and white morphotypes were collected from some selected markets within the FCT, Abuja. Analytical methods on the pulverized maize grains included solvent extraction using (acetonitrile/water (55:45), clean-up of pesticide residues as described by the Association of Official Analytical Chemists Quick Easy Cheap Efficient Rugged and Safe method (AOAC-QuEChERS) and quantification done by high performance liquid chromatography (HPLC) with UV detector. The results showed that the mean concentration of glyphosate in the maize grains ranged below the detection limit (BDL) to 24.30±0.002 mg/kg with a mean glyphosate concentration of 3.474 mg/kg was detected. Three samples representing 11.54% of the samples collected from Gwagwalada and Nyanya markets violated the World Health Organization (WHO)/Food Agricultural Organizatio.....

Article Published 2024 826 hits Available

2785

Hubungan kepimpinan transformasi guru besar dengan komitmen guru sekolah rendah daerah Jerantut Pahang

Nor Sharfina Yahaya

Abstract

Kajian ini bertujuan untuk menentukan hubungan antara kepimpinan transformasi guru besar dengan komitmen guru di sekolah rendah daerah Jerantut. Reka bentuk penyelidikan kuantitatif dan kaedah tinjauan dipilih untuk menjawab tiga persoalan kajian dan hipotesis. Sampel terdiri daripada 285 orang guru dari 48 buah sekolah rendah daerah Jerantut. Data dianalisis menggunakan analisis deskriptif dan analisis inferens. Dapatan kajian menunjukkan bahawa tahap kepimpinan transformasi guru besar (min = 4.38) dan komitmen guru (min = 4.51) adalah pada tahap yang tinggi. Dapatan kajian turut menunjukkan bahawa dimensi pemboleh ubah kepimpinan transformasi guru besar iaitu rangsangan intelek (min=4.43) merupakan tahap dimensi tertinggi diikuti oleh dimensi pertimbangan sosial (min=4.39), motivasi berinspirasi (min=4.38) dan pengaruh ideal (min=4.32). Manakala dalam dimensi komitmen guru, komitmen terhadap kerjaya (min=4.62) merupakan tahap dimensi tertinggi diikuti dimensi komitmen ter.....

Thesis Published 2024 780 hits Available

2786

Penerokaan video Penceritaan Digital dalam meningkatkan amalan membaca dan kemenjadian murid

Junainah Abdul Jalel

Abstract

Kajian ini dijalankan adalah bertujuan untuk meneroka Video Penceritaan Digital dalam meningkatkan amalan membaca dan kemenjadian murid. Objektif kajian ini adalah meneroka kesesuaian kandungan Video Penceritaan Digital dalam meningkatkan amalan membaca dan kemenjadian murid, mengenalpasti samada Video Penceritaan Digital dapat meningkatkan amalan membaca dan meneroka kemenjadian murid dari aspek kemahiran komunikasi. Reka bentuk kualitatif dan jenis kajian kes ini menggunakan kaedah analisis dokumen, temu bual dan pemerhatian dan juga deskriptif. Seramai sebelas orang responden yang terdiri daripada seorang Pegawai Perkhidmatan Pendidikan (Sektor Sumber Teknologi dan Pendidikan), lima orang guru dan lima orang murid. Data dianalisis dalam bentuk analisis tematik menerusi kaedah analisis kandungan. Dapatan kajian menunjukkan bahawa kandungan Video Penceritaan Digital haruslah sesuai dari segi elemen multimedia yang baik, tidak keterlaluan serta bersesuaian dengan kognitif m.....

Thesis Published 2024 1025 hits Available

2787

Pelaksanaan pedagogi koral oleh UITM Chamber Choir

Kuay, Huey Jing

Abstract

Kajian ini mendokumentasikan kualiti kepimpinan dan pelaksanaan pedagogi koral oleh UiTM Chamber Choir, sebuah kumpulan koir yang berprestij di Malaysia. Kajian ini bertujuan meninjau perkara-perkara yang berkaitan seperti aspek teknik vokal, kaedah latihan dan kualiti kepimpinan konduktor yang telah menyumbang kepada kejayaan kumpulan koir tersebut. Reka bentuk kajian ini menggunakan kaedah kualitatif dengan instrument temu bual, pemerhatian dan analisa dokumen bagi mendapatkan data. Kaedah temubual digunakan terhadap konduktor dan ahli koir manakala kaedah pemerhatian dijalankan sewaktu beberapa sesi latihan untuk mengkaji pedagogi koral yang diaplikasikan serta kualiti kepimpinan konduktor. Kaedah analisa dokumen dijalankan untuk mendapatkan gambaran terhadap kualiti diri dan kepimpinan seorang konduktor yang memberi impak positif kepada kecemerlangan sesebuah pasukan koir. Dapatan menunjukkan bahawa pengaplikasian pedagogi koral dari aspek teknik vokal yang berkesan dan.....

Thesis Published 2024 975 hits Available

2788

Pengaruh faktor kontekstual dan kepercayaan terhadap amalan Pentaksiran Bilik Darjah dalam kalangan guru sekolah rendah di Daerah Kinta Selatan

Nur Shira Zainuldin

Abstract

Tujuan kajian ini dijalankan bagi menentukan sejauh mana pengaruh faktor kontekstual (pengetahuan Pentaksiran Bilik Darjah (PBD), polisi pendidikan, kekangan masa, bebanan kerja) dan kepercayaan terhadap amalan PBD dalam kalangan guru sekolah rendah di daerah Kinta Selatan, Perak. Seramai 391 orang guru sekolah rendah dalam daerah Kinta Selatan, Perak dipilih sebagai sampel kajian menggunakan kaedah pensampelan rawak kelompok. Data kajian diperoleh menggunakan instrumen soal selidik yang diadaptasi dan disesuaikan (adapt and adopt) daripada kajian lepas. Instrumen kajian ini juga mengandungi lima konstruk iaitu pengetahuan PBD, polisi pendidikan, kekangan masa, bebanan kerja dan kepercayaan yang dikonseptual berdasarkan Model Kognisi Guru Borg dan Teori Ekologi Bronfenbrenner. Kaedah analisis yang digunakan ialah analisis statistik deskriptif (min dan sisihan piawai) dan inferensi (regresi berganda). Dapatan analisis deskriptif, menunjukkan pengetahuan PBD, polisi pendidika.....

Thesis Published 2024 1586 hits Available

2789

The technological innovation and its effect on operation efficiency of the oil and gas sector of the United Arab Emirates

Al Hosani, Waleed Mohamed Salem Mohamed

Abstract

This study aimed to examine the technological innovation and its effect on operation efficiency of the Oil and Gas Sector of the United Arab Emirates. The causal research design was employed through quantitative research methodology, using selfadministered online surveys for data collection. The purposive sampling technique selected 253 respondents of 5 ADNOC group and its subsidiaries from ADNOC Onshore, ADNOC Offshore, ADNOC Drilling, ADNOC Sour Gas and ADNOC LNG.. The study used regression, correlational, and descriptive statistics to analyse the proposed conceptual framework where after regression, Advanced Robotics significantly predicted OPE, F(1, 251) = 590.627, p < 0.001, which indicates that AR can plays a significant role in shaping OPE (b = 0.821, p < 0.001) hence HI supported. Autonomous under Water Vehicles significantly predicted OPE, F(1, 251) = 761.505, p < 0.001, which indicates that AU can play a significant role in shaping OPE (b = 0.867, p < 0.001). Arti.....

Thesis Published 2024 794 hits Available

2790

A review on chemical constituents and pharmacological action of the genus Lindera (Lauraceae

Nur Nabilah Mohd Zaini

Abstract

The genus Lindera consists of approximately 100 species that are widely distributed in tropical and subtropical areas throughout the world. It is represented by widely well-known medicinal and aromatic plants that produce various phytochemicals with potential pharmacological actions. This review attempts to summarize the information on the phytochemicals of Lindera species together with their biological properties. The data and information were collected via an electronic search engine which are Scopus, ScienceDirect, Google Scholar, PubMed, and SciFinder. Sesquiterpenes represent the major chemical compounds that have been characterised in Lindera species, as well as alkaloids, flavonoids, and phenolics. These compounds were shown to possess anticancer, antifibrotic, anti-inflammatory, antitumor, antioxidant, anti-arthritic, cytotoxic, antiallergic, and antihyperlipidemic properties. The outcome of these studies will further support the therapeutic potential of the genus Lindera and p.....

Article Published 2024 776 hits Available

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