Papers by Nurul Azizah Rahman
Jurnal Pendidikan Kimia, 2017
Penilitian ini bertujuan untuk mengetahui pengaruh video praktikum dengan modul elektronik terhad... more Penilitian ini bertujuan untuk mengetahui pengaruh video praktikum dengan modul elektronik terhadap keterampilan proses dan besar peningkatan keterampilan proses pada materi stokiometri siswa kelas X SMAN 2 Tidore Kepulauan.Jenis penelitian yang digunakan adalah penelitian eksperimen. Desain penelitian adalah OneGroup Pretest-Postest Design. Populasi penelitian adalah siswa kelas X SMAN 2 Tidore Kepulauan. Sampel penelitian adalah kelas X1 yang dipilih secara random. Teknik analisis data melalui analisis statistik deskriptif dan analisis statistik inferensial menggunakan SPSS 16. Hasil uji hipotesis diperoleh sig< 0,05 dan t hitung > t tabel maka penggunaan video praktikum dan modul elektronik berpengaruh terhadap keterampilan proses siswa. Nilai Gain adalah 85% menunjukkan interpretasi tinggi terhadap peningkatan keterampilan proses siswa.
Voltammetric studies of lead (ll), cadmium(ll), copper(ll) and chromium(lll) ions in the presence of selected n-heterocyclic compound
Voltammetry behaviours of lead(II), cadmium(II), copper(II) and chromium(III) ions in the presenc... more Voltammetry behaviours of lead(II), cadmium(II), copper(II) and chromium(III) ions in the presence of ligands with nitrogen bearing group, such as picolinic acid (pyridine-2-carboxylic acid or PA), nicotinic acid (pyridine-3-carboxylic acid or NA) and pyridine-2,4-dicarboxylic (2,4-PDCA) acid were being studied using hanging dropping mercury electrode (HDME) or platinum electrode as working electrode; Ag/AgCl (3 M NaCl) as reference electrode and platinum wire as counter electrode. Enhancement of the current response using voltammetry technique due to adsorption of electroactive species was investigated. Nicotinic acid has been found to cause enhanced peak current for metal ions such as Pb(II) andCd (II) by about 4.9 folds and 1.6 folds, respectively at a mercury electrode. While, picolinic acid has been found to cause current enhancement of reoxidation Cu(II) by about 1.2 folds using mercury electrode. By using platinum electrode, in the presence of 2,4-PDCA, current enhancement was observed by about 9.6 fold in reduction of Cr(III) ions. By optimizing condition the scan rate study for Pb(II), Cd(II) Cu(II) and Cr(III) were 0.6, 0.4, 0.6 and 0.66 respectively under optimum pH. Moreover, the detection limit were 3.55μM for Pb, 1.34μM for Cd, 2.5μM for Cu and 82.4μM for Cr with the sensitivity of cyclic voltammetry is accompanied by good reproducibility. Furthermore, based on the result obtained from double potential step chronocoulometry the diffusion coefficient of Pb-NA, Cd-NA, Cu-PA and Cr(III)-2,4-PDCA complex species are 7.32 x 10-6, 7.08 x 10-7, 6.18 x 10-6 and 3.9 x 10-6 cm2/s respectively. Various studies using techniques such as Cyclic Voltammetry (CV), Square Wave Voltammetry (SWV), Chronocoulometry (CC) and Chronoamperometry (CA) demonstrated that this enhancement effect was due to the adsorption of metal-ligand complexes on the electrode surface. Thus, this procedure was successfully applied to the simultaneous determination of metal ions (Pb and Cd) in some waste water.
First and foremost, I would like to grasp hold of this golden opportunity to express my very deep... more First and foremost, I would like to grasp hold of this golden opportunity to express my very deepest gratitude and warmest appreciation to my supervisor, Dr. Fadhilah Yusof for her valuable and constructive suggestions during the planning and development of this thesis. All of her encouragement, guidance and support from the initial to the final level enabled me to develop an understanding of this thesis. Her willingness to give her time so generously has been very much appreciated. On top of that, I would like to express my appreciation to the parties concerned from IPASA, Faculty of Civil Engineering, UTM for their cooperation and kind assistance by providing the data needed in my project. Without the data given, I might not complete my thesis. Not forgotten to my family and my friends for supported me and encouraged me to complete this thesis so that I will not procrastinate in doing it. Lastly, I offer my regards and blessings to all of those who supported me in any respect during the completion of this thesis and above all, to the Almighty God, who never cease in loving me and for the continued guidance and protection.
Identification Of Ige-Binding Proteins Of Male and Female Scylla Serrata (Mud Crab) Preliminary Results
Crab represents valuable nutrient source of protein, nutrients and functional lipids, is widely c... more Crab represents valuable nutrient source of protein, nutrients and functional lipids, is widely consumed. However the prevalence of crab allergy has increased over the past few years. In order to better understand local crab allergy, it is necessary to identify crab allergens. Multiple crab allergens including tropomyosin and arginine kinase have been identified as major allergens in various species of crab. Scylla serrata (mud crab) is an economically important crab species found in the Indo-Pacific region. So, the aim of this study was to identify the IgE-binding proteins of male and female Scylla serrata (mud crab). The raw extracts were prepared from the crab meat. The protein profiles and IgE-reactivity pattern were then identified by sodium dodecyl sulphate polyacrylamide gel electrophoresis (SDS-PAGE) and immunoblotting technique using sera from 10 patients with mud crab allergy. SDS-PAGE analysis of the male and female crab extracts revealed 19 protein bands ranging from 12 to 250 kDa. Immunoblot of male and female mud crab extracts demonstrated 7 and 5 IgE-binding proteins, respectively, with molecular weights between 30 to 150 kDa. Protein at 36 kDa was detected as the major allergen in both extracts. In addition, several proteins of 41, 50 and 95 kDa were also detected as major allergens in male crab, whereas a 75 kDa protein was detected as a major allergen in female crab. Other potential minor allergens were also observed at various molecular masses with the lower frequency (<25%). Our preliminary results indicated that both male and female crabs have multiple IgE-binding proteins including a protein of 36 kDa, which might be crab tropomyosin.
Food insecurity among students in a public University in Kuantan, Malaysia
tesis ini SULIT atau TERHAD, sila lampirkan surat daripada pihak berkuasa.organisasi berkenaan de... more tesis ini SULIT atau TERHAD, sila lampirkan surat daripada pihak berkuasa.organisasi berkenaan dengan menyatakan sekali sebab dan tempoh tesis ini perlu dikelaskan sebagai SULIT atau TERHAD. i Tesis dimaksudkan sebagai tesis bagi Ijazah Daktor Falsafah dan Sarjana secara penyelidikan, atau disertasi bagi pengajian secara kerja kursus dan penyelidikan, atau Laporan Projek Sarjana Muda (PSM).
Coffee has been associated with many health benefits, one of them being its antibacterial action ... more Coffee has been associated with many health benefits, one of them being its antibacterial action for which caffeine is widely believed to be responsible. This study investigated the antibacterial activities of decaffeinated and non-decaffeinated NESCAFÉ instant coffee against some pharyngitis-causing Streptococcus species – Group A Streptococcus, Group B Streptococcus, Group D Streptococcus and Streptococcus pneumoniae at eight different concentrations. NESCAFĖ brand of coffee, which is made and marketed by Nestlé, seems to be the most widely consumed instant coffee preparation the world over. Three sensitivity-testing methods were carried out: disc diffusion, well diffusion and Coffee Agar plate sensitivity testing. Zones of inhibition and growth on the plates were observed at 24 hours and 48 hours. Results show no agreement between the disc and well diffusion methods with both showing inconsistent zones of inhibition on repeat experiments. However inhibition of growth on Coffee Ag...
Background: Extracts from coffee beans have been shown to exhibit antibacterial action and it is ... more Background: Extracts from coffee beans have been shown to exhibit antibacterial action and it is widely believed that the caffeine content is responsible for this property.
Incorporating agroforestry practices in Karas (Aquilaria malaccensis) plantations in Malaysia
2012 IEEE Symposium on Business, Engineering and Industrial Applications, 2012
ABSTRACT Analysis on tree growth data and survival rate from a 6-year old Karas agroforestry plan... more ABSTRACT Analysis on tree growth data and survival rate from a 6-year old Karas agroforestry plantations in Rembau, Negeri Sembilan, Malaysia is reported in this paper. Three agroforestry components involved in this study include: (1) Karas monoculture, (2) Karas intercropped with lemongrass, and (3) Karas intercropped with guava. Three replicative plots measuring at 6 rows × 5 column of trees were established for each component. The diameter at breast height (DBH) of each component was measured within four time intervals while height was measured within two time intervals which produced three sets and one set of growth, respectively. From the field measurements, the DBH growth were 0.65, 0.71 and 0.95 cm respectively while the height growth were 6.82 and 12.21 m respectively. The means of DBH of Karas for the three components ranged from 1.94 to 2.90 cm with means of height ranged from 3.96 to 7.59 m. These translated into the Periodic Anual Increment (PAI) of diameter and height which were ranged from 1.74 to 2.43 cm/year and 3.47 to 6.65 m /year, respectively. From the analysis of variance (ANOVA), it was found that there is a significant difference in the means DBH and height of Karas among different components and growth interval (P≤0.05). From t-test analysis, there is a significant difference between the first and the second height growth measurements (P≤0.05). However, there is no significant difference in the survival rate among all components (P≥0.05). This concludes that there appear to be intercropping effects in the growth of a 6-year old Karas agroforestry system. The results from this study will be used for subsequent investigation in the assessments of growth performance of Karas under different intercropping components.
Diameter patterns of 5-year old Karas (Aquilaria malaccensis) agroforestry stands
2011 IEEE Symposium on Business, Engineering and Industrial Applications (ISBEIA), 2011
Abstract The work conducted in this study is based on a preliminary data collection for assessing... more Abstract The work conducted in this study is based on a preliminary data collection for assessing a soil status in a 5-year old Karas agroforestry plantations in Rembau, Negeri Sembilan, Malaysia. Three agroforestry components involved in this study include (1) ...
Case study on impact of seasonal variations of soil resistivities on substation grounding systems safety in tropical country
2011 7th Asia-Pacific International Conference on Lightning, 2011
It is important to evaluate the validity and safety of the substation earthing system since over ... more It is important to evaluate the validity and safety of the substation earthing system since over time the physical and electrical properties or requirements of the substation earthing can change in many ways. A research study focused on safety assessment of substation earthing systems due to variations of soil resistivities values which dependent on tropical rainfall variations was carried out
Prevalence of stress, stressors and coping strategies among secondary school students in Kota Bharu, Kelantan, Malaysia
International Journal of Students' Research, 2011
Linn and Zeppa [1] stated that some stress in school training is needed for learning. They divide... more Linn and Zeppa [1] stated that some stress in school training is needed for learning. They divided stress as &amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;#x27;favorable&amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;#x27; and &amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;#x27;unfavorable&amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;#x27;. Stress which promotes and facilitates learning is called &amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;#x27;favourable&amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;#x27; stress and the one which inhibits and suppresses learning is called &amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;#x27; ...
Usage of e-banking facilities among urbanites in Malaysia
2012 IEEE Colloquium on Humanities, Science and Engineering (CHUSER), 2012
Electronic banking channels are playing an increasingly significant role in the financial sector ... more Electronic banking channels are playing an increasingly significant role in the financial sector particularly with regards to online transactions. However, there are some segments of bank customers who prefer to conduct their banking transactions the tradition way because of security and trust aspects. No doubt for the younger generation who are technology savvy, the use of e-banking facilities are beneficial to them as time and effort are saved. But there is an increasing concern by the banks' administrators as not all the customers are into online banking and this study is significant because of the need to know the factors which contribute to the e-banking usage. Therefore, this study was proposed firstly to determine the highest contributor among computer self-efficacy, perceived usefulness, perceived ease of use and security with usage of e-banking. Then, the second objective is to study the relationship between computer self-efficacy and usage of e-banking facilities. Last but not least is to compare the level of perceived ease of use of e-banking facilities among genders. The researchers are using probability and non probability sampling technique as well as face-to-face method for distributing questionnaires to the respondents. From the findings of this study, it was found that computer self-efficacy is the highest contributor among the factors that lead to the usage of e-banking. Meanwhile, the other factors are also influencing towards the usage of e-banking facilities. This study has identified the factors which have a say can influence the urban dwellers in Shah Alam to utilize the e-banking facilities.
Journal of Medical Microbiology, 2010
International Journal of Mobile Network Design and Innovation, 2013
A sharp increase in mobile device and applications raise serious concern on individual privacy ri... more A sharp increase in mobile device and applications raise serious concern on individual privacy risk in smartphone. Capabilities of current mobile device which enable it to have similar functionality with notebook inspires user to use it for many purposes. However, the scenario attracts attacker to intrude privacy in order to gain data on the device for specific purpose. This paper presents a preliminary study on privacy risks in smartphone environment from individual user perspective. The contribution of this paper is two fold. First, the privacy risks are reviewed from physical and logical viewpoint. Then an online survey is conducted to gain initial perception of privacy practice among users. Second contribution is by providing and discussing a guideline to deal with privacy risk incident on smartphone. As conclusion, future work and research on privacy risk is discussed to generate more contributions in this area.
Bioresource Technology, 2013
h i g h l i g h t s First documentation of metal removal potential by Effective Microorganisms. F... more h i g h l i g h t s First documentation of metal removal potential by Effective Microorganisms. Free-cell forms of Effective Microorganisms have poor metal removal potential. Use of alginate in biosorbents enhanced metal removal significantly.
Int. J. Electrochem. Sci, 2011
The solution phase voltammetry employed in the study of metal ion interaction with a selected lig... more The solution phase voltammetry employed in the study of metal ion interaction with a selected ligand. Voltammetry behaviours of lead (II) ion in the presence of ligand with N-heterocycle compounds, such as nicotinic acid (pyridine-3-carboxylic acid) were being studied using cyclic voltammetry (CV) on a hanging dropping mercury electrode (HDME). Assessment of the chemical and physical conditions that may favour optimum current enhancement was done by studying the effect of varying pH, concentration of metal ion and scan rate. It was found that in presence nicotinic acid (NA) result in a shift in peak potential (E p) and peak current (I p) in the determination of Pb(II). The addition of 1 x 10-2 M nicotinic acid in 0.1 M potassium chloride at pH 4.0 and scan rate of 100 mV/s in CV was required for optimum current enhancement to be observed by about 4.9 fold and 1.6 fold in oxidation and reduction current of Pb(II) respectively. Based on chronocoulometry and chronoamperometry technique the diffusion for Pb(II) were estimated by 9.18 x 10-6 cm 2 /s and 5.0 µc/cm 2 respectively. The procedure was successfully applied to the simultaneous determination of Pb(II) ion in some real samples.
The Study of Biodegradation Kinetics of Starch Based on Coating in Controlled Released Fertilizer (CRF)
Applied Mechanics and Materials, 2013
The aim of this study is to prepare a starch film and analyze its characteristics in different pH... more The aim of this study is to prepare a starch film and analyze its characteristics in different pH condition. Starch has been given great attention and has been actively investigated to be used as coating materials for CRF because of its degradation properties. Once the analysis on the starch characteristics is completed, the reaction rate of the starch can be developed by using Michaelis-Menten equation as reference. The results of the reaction rate are important to help determine the biodegradation kinetics of the starch. It will also assist in determining the conditions needed to produce the starch film in order to reduce the release rate of fertilizer. Throughout this study, the biodegradation kinetics of starch film will be investigated and thus providing a reference for the selection of coating material for the application of CRF while improving agriculture production.
Uploads
Papers by Nurul Azizah Rahman