UPSI Digital Repository (UDRep) : Guest Mode

Search Results

16 record(s) found

Magnetic and phase behavior of magnetic water-in-oil microemulsions

Brown Paul, Mohamed Azmi, Ardyani Tretya, Rogers Sarah E., Eastoe Julian,

Article Published 2017 1498 hits Limited

Bioactive -conjugated 3-keto-steroids from the Australian brown alga ystophora xiphocarpa

Abstract

As part of our ongoing study of the specialised metabolites present in brown algae belonging to the Cystophora genus, eight new steroids including three pairs of diastereoisomers were isolated from Cystophora xiphocarpa (Harvey) (Sargassacea, Fucales). The metabolites identified by standard spectrometric methods are (16S,22S)-16,22-dihydroxyergosta-4,24(28)-dien-3-one and (16S,22R)-16,22-dihydroxyergosta-4,24(28)-dien-3-one, (16S,22S,24R)-16,22,24-trihydroxyporifera-4,28-dien-3-one and (16S,22S,24S)-16,22,24-trihydroxystigma-4,28-dien-3-one along with (16S,22S,24E)-16,22-dihydroxystigma-4,24(28)-dien-3-one and (16S,20S)-16,20-dihydroxyergosta-4,24(28)-dien-3-one. (16S,22S,24E)-16,22-Dihydroxystigma-4,24(28)-dien-3-one possessed the most potent cytotoxicity of the steroids in this series with cell growth inhibitions of GI50 8.7 � 0.7 ?M against colon cancer HT29, GI50 5.6 � 0.8 ?M against the breast cancer line MCF-7 and GI50 4.5 � 0.2 ?M against the ovarian cancer cell line A2780.....

Article Published 2021 1031 hits Available

Effect of deficiency-adjusted macronutrients to cure brown bast syndrome in rubber tree (Hevea brasiliensis)

Salisu Monsuru Adekunle

Abstract

The brown bast (BB) syndrome causes a 15-20% loss of annual rubber (Hevea brasiliensis) production in Malaysia, and no sustainable remedy has been developed yet. Initial investigation showed a macronutrients deficiency in the bark of affected plants compared to non-affected plants. Therefore, this study was undertaken to know the effect of spraying the deficient macronutrients in curing BB syndrome and increasing latex productivity. The treatments were selected by adjusting deficient nutrients, especially in N, K, and S, compared to healthy plants. The treatments consisted of 13 combinations of nutrient concentrations and a control (no application on healthy rubber trees). One liter of individual treatment per tree was applied on the trunk of BB-affected trees once a week for one month. Data on latex production was collected one week after the last application and continued for up to three months. The results showed that the treatment T9 (0.5% N, 0.8 mg/L K, and 0.2% S), in addition to.....

Article Published 2023 1059 hits Available

What do the L2 generalizability studies tell us?1

Dean, Brown James

Abstract

This research synthesis examines the relative magnitudes of the variance components found in 44 generalizability (G) theory studies in L2 testing. I begin by explaining what G theory is and how it works. In the process, I explain the diffrences between relative and absolute decisions, between crossed and nested facets, and between random and fixed facets, as well as what variance components (VCs) are and how VCs are calculated. Next, I provide an overview of G-theory studies in L2 testing and discuss the purposes of this research synthesis. In the methods section, I describe the materials used in this research synthesis in terms of the samples of students, the tests, and the G-study designs used. I also present the analyses in terms of how the data were compiled and analyzed. The results are sorted and displayed to reveal patterns in the relative contributions to test variance of various individual facets as well as interactions between and among facets for different types of tests. I .....

Article Published 2011 132 hits Available

Nilai-nilai perwatakan Melayu dalam imej warna: satu penelitian Etnografi seni

Hasan Achmad Sopandi,

Abstract

Dalam masyarakat Melayu penggunaan warna biasanya dijumpai dalam pelbagai artifak. Warna alam semula jadi lebih banyak digunakan untuk bahan pewama, diperolehi daripada bahan pewama yang ‘mesra alam’ yang sebati dengan kehidupan seharian masyarakat Melayu. Perkara itu telah wujud sejak berabad-abad yang lalu, malah dipercayai wujud dari zaman prasejarah lagi. Orang Melayu pada zaman dahulu mengambil berat tentang nilai-nilai dan perwatakan warna. Warna digunakan rneluas dalam masyarakat Melayu, imej dap satu warna menurut kepercayaan, pengguna akan aman damai dan jauh dari malapetaka. Warna tradisional tempatan ialah satu warisan milik orang Melayu yang memiliki makna dan nilai-nilai yang melibatkan cara hidup, ekonomi, alam persekitaran. Dari faktor ini lahimya pelbagai bentuk kraftangan dan artifak tradisional Melayu. Dalam penggunaan warna trad sional Melayu, pandai tukang memainkan peranan yang penting. Warna wujud kerana keperluan kehidupan seperti untuk berkomunikasi, adat is.....

Conference Item Published 2003 2115 hits Available

Preliminary toxicity test and phytochemical screening of Sargassum polycystum crude extracts from marine macroalgae

Daud Norhayati, Mohd Noor Nor Nafizah, Alimon Hasimah, Abdul Rashid Nursuhaidah,

Abstract

Sargassum polycystum is a species of brown algae (Phaeophyta). Some recent studies have found many uses of this algae, one of them is for medicine. In this study, crude hexane, dichloromethane and methanol extracts of Sargassum polycystum were tested for toxicity activity and screened for its principal chemical substances. The toxicity test was done using Brine Shrimp Lethality (BSL) test against Artemia salina Leach. The results of this study showed the LC50 value of methanol extract was 295.12 mgml-1, while both hexane and dichloromethane extracts were 275.42 mgml-1. The BSL test exhibited no significant toxicity against A.salina. Phytochemical screening shows S. polycystum contained non polar and polar components. As the conclusion, S. polycystum contained secondary metabolites that are not toxic to A. salina and they are not a potential source for toxicity...

Article Published 2015 3381 hits Available

Validation of an instrument to measure the feedback conceptions scale

Nor Hasnida Che Md Ghazali

Abstract

It is very important to check for validity and reliability of self-report scales or measures. This study aimed to determine the validity and reliability of an instrument which is adapted from Harris and Brown (2008) known as ‘Teachers' Conceptions of Feedback (TCoF) inventory’. The instrument consists of 37 items from 9 constructs namely irrelevance, improvement, accountability, encouragement and self-type, task, process, self-regulation, peer and self-assessment and timeliness. One hundred and eighty-five (N=185) undergraduate students who are also the student teachers had completed the questionnaire. Respondents used a six-point agreement rating scale coded as strongly disagree=1, mostly disagree=2, slightly agree=3, moderately agree=4, mostly agree=5 and strongly agree=6. The content was validated by three experts in the field of measurement and evaluation. Data analysis was completed using the Rasch measurement model. The findings revealed that most items fit the model as their.....

Article Published 2019 1564 hits Available

Design and development of skin detection model based deep learning on different skin tones

Al-Qaysi, Mohammed Ahmed Chyad

Abstract

The aim of this study is to design and develop a systematic dataset for multiple skin tones and to analyse the reasons behind misclassifications of skin and non-skin, using different deep learning models, colour spaces, and different optimisation parameters. Related academic literature have cited three problems, namely data-related issues (e.g. skin-like), data volume (e.g. large volume requires high computer source), and technical issues (e.g. optimising parameters). Two articles on Deep Learning (DL) for skin detection failed to address the issues extensively. DL foundation is a training dataset and the quality of training depends on the quality of the data-input. To address the issues, a systematic dataset consisting of 17 million patches was created for multiple skin tones with (skin-like) images. The dataset was then converted into different colour spaces with multiple labels that characterise different scenari.....

Thesis Published 2021 3934 hits Available

Seni penolakan Melayu antara pemimpin berdasarkan teks Sulalat Al-Salatin

Norshariza Mohamed Faizal

Abstract

Isu kesantunan berbahasa dalam melakukan penolakan amat penting sebagai cerminan budaya masyarakat Melayu. Berlandaskan aspek seni penolakan, kajian ini dilakukan untuk menganalisis strategi penolakan Melayu dalam melakukan penolakan antara golongan raja dengan raja. Berdasarkan Teks Sulalat Al-Salatin, kajian ini dianalisis secara deskriptif menggunakan Teori Kesantunan Brown dan Levinson (1987). Berdasarkan Strategi Kesantunan Positif dan Strategi Kesantunan Negatif ini, analisis kajian yang dikaji dilihat bahawa cara penolakan masyarakat Melayu ini telah lama dipraktikkan pada zaman Kesultanan Melayu dahulu cuma istilah yang digunakan berbeza dengan istilah barat dan Islam. Hal ini demikian kerana sifat budi dalam berbahasa sememangnya dititikberatkan dalam masyarakat Melayu. Kajian ini mendapati bahawa masyarakat Melayu pada zaman dahulu mempunyai strategi yang santun dalam melakukan penolakan. Kesantunan dalam kehidupan masyarakat Melayu tidak hanya terbatas dengan perlakuan bahas.....

Article Published 2020 1025 hits Available

Morphogenesis studies of Brassica oleraceae L.var Capitata through tissue culture system

Noor Fara\'Ain Daud

Abstract

Experiment were carried out to establish the most optimum culture condition and to identify the most responsive explants for regeneration Brassica oleraceae L. var Capitata through plant tissue culture system. Acclimatization process for established plantlets was also conducted. The experimental design of this study was Complete Randomized Design (CRD) method. For shoot regeneration using different concentrations of BAP and NAA, the most responsive explant was stem explants in which MS medium supplemented with 1.5 mg/L BAP and 0.5 mg/L NAA produced 8.400 ± 0.889 shoots per explant. Whereas, the combination auxin and cytokinin also showed stem explants was the most responsive. Subsequently, for root regeneration using different concentrations of BAP and NAA, the most responsive explant was leave in which MS media supplemented with 0.5 mg/L BAP and 0.5 mg/L NAA produced 51.133 ± 2.929 roots per explant. While the combination of auxin and cytokinin showed the most responsive.....

Thesis Published 2021 1073 hits Available

First Prev

Page 1 of 2

Next Last

Search Results

Filter

Specific Period

Recently Accessed