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Fulltext Effect of Luting Cements On the Bond Strength to Turkom-Cera All-Ceramic Material

Al-Makramani BMA, Razak AAA, Abu-Hassan MI, Al-Sanabani FA, Albakri FM

Open Access Maced J Med Sci, 2018 Mar 15;6(3):548-553.
PMID: 29610618 DOI: 10.3889/oamjms.2018.111

BACKGROUND: The selection of the appropriate luting cement is a key factor for achieving a strong bond between prepared teeth and dental restorations.
AIM: To evaluate the shear bond strength of Zinc phosphate cement Elite, glass ionomer cement Fuji I, resin-modified glass ionomer cement Fuji Plus and resin luting cement Panavia-F to Turkom-Cera all-ceramic material.
MATERIALS AND METHODS: Turkom-Cera was used to form discs 10mm in diameter and 3 mm in thickness (n = 40). The ceramic discs were wet ground, air - particle abraded with 50 - μm aluminium oxide particles and randomly divided into four groups (n = 10). The luting cement was bonded to Turkom-Cera discs as per manufacturer instructions. The shear bond strengths were determined using the universal testing machine at a crosshead speed of 0.5 mm/min. The data were analysed using the tests One Way ANOVA, the nonparametric Kruskal - Wallis test and Mann - Whitney Post hoc test.
RESULTS: The shear bond strength of the Elite, Fuji I, Fuji Plus and Panavia F groups were: 0.92 ± 0.42, 2.04 ± 0.78, 4.37 ± 1.18, and 16.42 ± 3.38 MPa, respectively. There was the statistically significant difference between the four luting cement tested (p < 0.05).
CONCLUSION: the phosphate-containing resin cement Panavia-F exhibited shear bond strength value significantly higher than all materials tested.

Matched MeSH terms: Analysis of Variance
Fulltext Extraction and purification of Cytotoxic compounds from Premna Serratifolia L. (Bebuas) for human breast cancer treatment

Salih, G.A., Ahmad-Raus, R., Shaban, M.N., Abdullah, N.

International Food Research Journal, 2017;24(101):0-0.
MyJurnal

Breast cancer is considered as one of the most common cancers all over the world. A huge effort has been made to create a safe and cost effective breast cancer treatment. All of these features exist in the plants sources. In this study, the effect of local vegetable salad, Premna serratifolia (Bebuas) against MCF-7 cells (human breast adenocarcinoma) was determined. The optimum condition to extract breast cancer cytotoxic compound from the plant was investigated and the exact cytotoxic compound was identified as well. To determine the plant cytotoxicity effect against MCF-7 cells, MTT assay was used. Two important parameters in the sonication extraction method which are duration of time and temperature were optimized by carrying out a series of experiments which were designed by Face Centered Central Composite Design (FCCCD). The extraction efficiency of each experiment was determined by measuring the yield of extract and the half maximal inhibitory concentration (IC50) of the extract against MCF-7 cells. The results obtained from the experiments were fitted to the second order polynomial model to generate equation that was used to determine best extraction processing condition. Based on the generated equation, the best sonication processing condition to extract the cytotoxic compound is at 30oC for 67 min. Analysis of variance (ANOVA) showed that the duration of extraction time has great influence (p

Matched MeSH terms: Analysis of Variance
Fulltext The Effect of Cavity Design on Fracture Resistance and Failure Pattern in Monolithic Zirconia Partial Coverage Restorations - An In vitro Study

Harsha MS, Praffulla M, Babu MR, Leneena G, Krishna TS, Divya G

J Clin Diagn Res, 2017 May;11(5):ZC45-ZC48.
PMID: 28658906 DOI: 10.7860/JCDR/2017/25305.9856

INTRODUCTION: Cavity preparations of posterior teeth have been frequently associated with decreased fracture strength of the teeth. Choosing the correct indirect restoration and the cavity design when restoring the posterior teeth i.e., premolars was difficult as it involves aesthetic, biomechanical and anatomical considerations.
AIM: To evaluate the fracture resistance and failure pattern of three different cavity designs restored with monolithic zirconia.
MATERIALS AND METHODS: Human maxillary premolars atraumatically extracted for orthodontic reasons were chosen. A total of 40 teeth were selected and divided into four groups (n=10). Group I-Sound teeth (control with no preparation). Group II-MOD Inlay, Group III-Partial Onlay, Group IV-Complete Onlay. Restorations were fabricated with monolithic partially sintered zirconia CAD (SAGEMAX- NexxZr). All the 30 samples were cemented using Multilink Automix (Ivoclar) and subjected to fracture resistance testing using Universal Testing Machine (UTM) (Instron) with a steel ball of 3.5 mm diameter at crosshead speed of 0.5 mm/minute. Stereomicroscope was used to evaluate the modes of failure of the fractured specimen. Fracture resistance was tested using parametric one way ANOVA test, unpaired t-test and Tukey test. Fracture patterns were assessed using non-parametric Chi-square test.
RESULTS: Group IV (Complete Onlay) presented highest fracture resistance and showed statistical significant difference. Group II (MOD Inlay) and Group III (Partial Onlay) showed significantly lower values than the Group I (Sound teeth). However, Groups I, II and III presented no significant difference from each other. Coming to the modes of failure, Group II (MOD Inlay) and Group III (Partial Onlay) presented mixed type of failures; Group IV (Complete Onlay) demonstrated 70% Type I failures.
CONCLUSION: Of the three cavity designs evaluated, Complete Onlay had shown a significant increase in the fracture resistance than the Sound teeth.

Matched MeSH terms: Analysis of Variance
Fulltext Flexural and morphological properties of newly developed glass ionomer cement (GIC) with the incorporation of 3-acetylcoumarin

Azlisham, N.A.F., Abdul Rahman, F.S., Mohamad, D.

Malaysian Journal of Microscopy, 2015;11(1):11-15.
MyJurnal

The objective of the present study is to evaluate the effect of incorporation of 3- acetylcoumarin (3-AC), an antibacterial agent, on the mechanical and surface morphology of glass ionomer cement (GIC). A conventional GIC, Fuji II LC, was used as a control. 3-AC was incorporated into GIC during its manipulation at percentage of 2% and 5% (wt/wt). Flexural strength of the specimens were analysed using Shimadzu AGX-Plus while morphological evaluation of the specimens were observed using Scanning Electron Microscope (SEM). Oneway analysis (ANOVA) with post-hoc Bonferroni multiple-range test was used to determine the significant differences among the groups. Statistically, the incorporation of 2% (wt/wt) of 3-AC into GIC showed a significantly lower flexural strength (p

Matched MeSH terms: Analysis of Variance
Fulltext The effects of plyometric training on the muscle physical changes among long jumpers

Prabhu Ragawan, Ruaibah Yazani Tengah

Jurnal Sains Sukan & Pendidikan Jasmani, 2018;7(1):62-70.
MyJurnal

This study aim to examine the effectiveness of plyometric training on muscle physical changes. 24 long jumpers under 12 year old from Cameron Highland were involved in this study. 12 participants were in the control group and another 12 were assigned into treatment group. The training program was conducted twice a week for six weeks. Girth of thigh and calf muscles measurement were conducted during pre-test and post-test. The data were analyzed using descriptive analysis and two-way ANOVA test to determine the mean differences between groups, trial period and interaction of group and trial period. The findings showed that calf and thigh circumference show an improvement for both treatment and control group, in which the treatment group had gained significantly higher achievement. The two-way ANOVA test showed significant differences in enlargement of thigh muscle and calf muscle diameter between groups and trial period. As a conclusion, the plyometric exercises increased circumference of the thigh muscles and calf muscles among long jumpers. The implication of the study is that the proper plyometric training with an appropriate load for primary school athletes need to be implemented to achieve peak performance.

Matched MeSH terms: Analysis of Variance
Fulltext Knowledge and perception of flexible dentures among dental private practitioners in Klang Valley, Malaysia

Rozano, A.S., Asman, N., Zubaidah Z.A., Lim, G.S.

Ann Dent, 2017;24(2):33-38.
MyJurnal

Prescription of flexible denture (FD) is non preference by the clinician in Ministry of Health Malaysia and it was not included in the curriculum of public university. However, among private dental practitioner (PDP) this treatment modality is highly favourable. Therefore, this study was conducted to assess the level of knowledge and perception on the flexible dentures by the PDP. The level of perception and knowledge on FD was analysed using validated questionnaire. 42 PDP had participated. An independent t-test was employed to determine the statistical difference between genders. One Way ANOVA was used to evaluate the statistical difference between their years of experience in private sector on knowledge and perception of flexible denture. There was no significant different in knowledge between female and male (p=0.892) and years of experience (p=0.617). Perceptions of flexible denture, was not significantly influence by genders (p=0.068) but by year of experiences between group A and B (p=0.039), and between group B and group C (p=0.039). P value was set at 0.05. In conclusion, there is a correlation between perceptions of flexible denture and years of experience of private dental practitioner.

Matched MeSH terms: Analysis of Variance
Fulltext Screening of significant factors in collagen extraction from hybrid Clarias sp. using a statistical tool

Kiew, P.L., Mat Don, M.

International Food Research Journal, 2013;20(4):1913-1920.
MyJurnal

Extraction of collagen from muscles of cultured catfish (Clarias gariepinus × C. macrocephalus) with the aid of pepsin digestion was investigated using a statistical tool. Fractional factorial design (FFD) was applied to evaluate the effects of eight process parameters: acetic acid concentration, acid extraction time, acid extraction temperature, acetic acid to muscles ratio, NaOH concentration, NaOH to muscles ratio, NaOH treatment time, and stirring speed. Contribution of every parameter in influencing the extraction efficiency was evaluated and factors that significantly affected the extraction were elucidated by employing experimental design and analysis of variance in FFD. The result of first order factorial design showed that acetic acid concentration, acid extraction time, acid to muscles ratio, and stirring speed had significant effect (P < 0.05) to the yield of pepsin soluble collagen (PSC) obtained at the end of the experiment. Effects of these process factors on the efficiency of collagen extraction were investigated, and are discussed in detail. Optimum conditions were found at 0.5 M acetic acid, 16 hr extraction period, solvent to muscles ratio at 25 ml/g, and stirring speed of 400 rpm, resulting in yield of PSC as high as 211.49 ± 15.51 mg/g.

Matched MeSH terms: Analysis of Variance
Fulltext The effects of external and internal focus on the Press Behind Neck lift among Weightlifters

Ahmad Fazlan Ghazalli, Mahamad Yusof Abdul Rani, Lee, Jeffrey Low Fook

Jurnal Sains Sukan & Pendidikan Jasmani, 2016;5(2):53-60.
MyJurnal

Journal of Sports Science and Physical Education 5(2): 53-60, 2016 – Many previous studies
focus on attention has consistently demonstrated that an external focus (movement effect)
enhances motor performance and learning relative to an internal focus (body movements).
However, the effectiveness of the external focus direction and internal focus on the press
behind neck lift not yet again compared among the weightlifter. Therefore, the aim of this
study was to identify the three conditions (external focus, internal focus and control) that
brings the best performance in the press behind neck. Besides that, a total of 30 athletes
Selangor weightlifters performed the pre-test before they are divided into treatment groups
(external focus and internal focus) and a control group. There are changes in the score in
force between the test scores (pre, post and retention test) and the group will be analyzed
using Two Way ANOVA Repeated Measure. The results showed that, there are the main
effect of testing, F(2, 54) = 1671.065 p = 0.001 means there is a significant difference
between pre-test and post-test . There is a main effect for group, F (2, 27) = 16,646, p =
0.001. Meanwhile, there was a significant interaction between the test group f (4. 54) =
378,732 p = 0.001. There are no significant differences between the three groups during the
pre-test. However, in the post-test found an external focus groups (M = 51.5 kg, SP = 7.4)
and an internal focus group (M = 49.5kg, SP = 6.6) is better and has significant differences to
the control group (M = 30.5kg, SP= 6.9). Besides that, the external focus group retention test
(M= 59.5 kg, SP=6.0) is better and has a significant difference compared with internal focus
(M= 43.2kg, SP = 5.9) and the control group (M= 30.1, SP = 6.3). Therefore, the overall
direction of a focus of external forces show better performance compared to focus on internal
and groups are not given any specific instructions for long term programme.

Matched MeSH terms: Analysis of Variance
Fulltext Effects of augmented feedback on squat technique among eleven years old children

Ahmad Syariff Ahmad Tajudin, Mohammad Hamka Nizam Mohamad Rosni, Lee, Jeffrey Low Fook

Jurnal Sains Sukan & Pendidikan Jasmani, 2016;5(1):1-8.
MyJurnal

The purpose of this study was to compare the acquisition of performing the squat technique using visual and verbal feedback among eleven years old children. Thirty standard 5 students from a semi urban primary school were recruited for this study. Each participant performed the squat without any provision of feedback in the pre-test. Their performance was assessed using the Motion Competency Screen (MCS) scale. The pre-test scores were used to divide the participants randomly into three groups (i.e., visual-, verbal-feedback and control). During the acquisition phase (two weeks), the visual group (video recordings of their performance) received feedback about the correct squat technique by a qualified trainer while the verbal feedback group received verbal instructions and feedback from the same instructor on their performance. The control group did not participate in any trials during acquisition phase. All participants were tested again in the post- and retention test a week after the post-test. A 3 group x 3 tests mixed between-within ANOVA with repeated measures on the second factor was used to measure the between and within group mean differences. There was no significant different between groups for the pre-test. However, both the visual and the verbal feedback groups were significantly better than the control group in the post test. However, in the retention test, the verbal group significantly outperformed the visual group. Again both groups were significantly better than the control group. In conclusion, both visual and verbal feedbacks were effective in learning a motor skill. Interestingly, verbal feedback showed to be more effective for long term retention (learning).

Matched MeSH terms: Analysis of Variance
Data on modeling mycelium growth in Pleurotus sp. cultivation by using agricultural wastes via two level factorial analysis

Dzulkefli NA, Zainol N

Data Brief, 2018 Oct;20:1710-1720.
PMID: 30263925 DOI: 10.1016/j.dib.2018.09.008

In this article, five variables including type of substrates, sizes of substrates, mass ratio of spawn to substrates (SP/SS), temperature and pretreatment of substrates were used to model mycelium growth in Pleurotus sp. (oyster mushroom) cultivation by using agricultural wastes via two level factorial analysis. Two different substrates which were empty fruit bunch (EFB) and sugarcane bagasse (SB) were used. Analysis of Variance (ANOVA) for both mycelium extension rate (M) and nitrogen concentration in mycelium (N) showed that the confidence level was greater than 95% while p-value of both models were less than 0.05 which is significant. The coefficient of determination (R2) for both M and N were 0.8829 and 0.9819 respectively. From the experiment, the best condition to achieve maximum M (0.8 cm/day) and N (656 mg/L) was by using substrate B, 2.5 cm size of substrate, 1:14 for SP/SS, incubated at ambient temperature and application of steam treatment. The data showed that EFB can be used to replace sawdust as a media for the oyster mushroom cultivation. Data analysis was performed using Design Expert version 7.0.

Matched MeSH terms: Analysis of Variance
Fulltext Comparison of popular sagittal cephalometric analyses for validity and reliability

Qamaruddin I, Alam MK, Shahid F, Tanveer S, Umer M, Amin E

Saudi Dent J, 2018 Jan;30(1):43-46.
PMID: 30166870 DOI: 10.1016/j.sdentj.2017.10.002

Background: The analysis of skeletal relationships of jaws in the sagittal plane is of utmost importance in orthodontic diagnosis for which numerous lateral cephalometric analyses have emerged. None of the analyses is without flaws. Current study compares ANB, Wits appraisal, Beta angle, Yen angle and W angle for their validity and reliability in diagnosis of skeletal classes.
Methods: Pretreatment cephalograph of 209 orthodontic patients comprised of 92 males and 117 females were selected from orthodontic archives. Radiographs were traced for ANB, Wits appraisal, Beta angle, W angle and Yen angle measurements. Patients were divided into three skeletal classes i.e. class I, II and III based on measurements and incisor classification and profile recorded from their files. ANOVA was applied to check the validity of performed analyses and Cramer's correlation was performed to find out the correlation between analyses and skeletal classes.
Results: All performed analyses showed statistically significant difference in the values for all three skeletal classes p

Matched MeSH terms: Analysis of Variance
Fulltext The effect of hand grip strength and trunk rotation strength on throwing ball velocity

Rozella Ab Razak, Kee, Kang Mea, Raja Nurul Jannat Raja Hussain, Nur Atikah Mohamed Kassim, Nuraimi Othman

Movement Health & Exercise, 2018;7(1):89-98.
MyJurnal

Throwing ball velocity is one of the indicators that determine softball
performance. However, most of the training on throwing only focused on the
major muscles and they neglected the assisted muscles such as hand grip and
trunk rotation muscles that also crucial in improving the throwing
performance. Therefore, the purpose of this study is to identify the effect of
hand grip strength training, and trunk rotation strength training towards the
throwing ball velocity among female collegiate softball players. 54 female
collegiate softball players were equally divided into three training groups
which are hand grip strength training group (HG), trunk rotation strength
training group (TR), and basic strength training group (CG). All the groups
performed the same basic strength training program with different additional
strength training according to the group`s treatment. Each group trained 3
days per week for 6 weeks. Throwing ball velocity was assessed before
(pretest) and after (posttest) the 6 weeks training program via one-way
between groups analysis of variance (ANOVA) to compare the mean gained
score in throwing ball velocity between each group. The result shows that all
group significantly differences in throwing ball velocity (p

Matched MeSH terms: Analysis of Variance
Fulltext Knowledge and awareness of hepatitis B and its associated factors among students of medical faculties at the international International Islamic University Malaysia’s Kuantan campus

Wisam Nabeel Ibrahim, Ain Nadiah Mazlan, Noratikah Othman, Sinan Mohammed Abdullah Al-Mahmood

International Journal of Care Scholars, 2018;1(2):19-21.
MyJurnal

Objective: this study aims to assess the knowledge and awareness of hepatitis B and its associated factors among students of medical colleges at Kuantan Campus, the International Islamic University Malaysia. Methods: A cross-sectional study design was used, and data collection was carried out using a selfstructured close-ended questionnaire. Descriptive and analytic statistics were performed with independent t-test, One Way ANOVA and a correlation analysis determine any significant differences between the groups with p < 0.05 significance value Results: According to the results, there was a significant (p < 0.001) association between the type of Faculty with knowledge and awareness about hepatitis B. In addition, the results showed an association between year of study with the knowledge and awareness of hepatitis B (p < 0.001). Furthermore, there was an association between duration of clinical experience with knowledge and awareness of hepatitis B (p < 0.001). The results showed that there was no association between gender with knowledge and awareness of hepatitis B (p > 0.05). Conclusion: levels of knowledge showed a strong correlation with levels of awareness, meaning that students with high knowledge also had high awareness of hepatitis B. On the whole, students were aware of and knowledgeable about hepatitis B.

Matched MeSH terms: Analysis of Variance
Fulltext Online shopping practices and factors influencing

Farhan Mat Arisah, Shamsul Azahari Zainal Badari, Ahmad Hariza Hashim

Malaysian Journal of Social Sciences and Humanities, 2016;1(3):111-123.
MyJurnal

Online shopping has been preferred over the conventional shopping methods as the results of hectic
lifestyles nowadays. It is a convenient way to get groceries without having to queue at the counters.
The objective of this research is to study the online shopping practices and the factors that affect it.
Apart from that, it is also to identify the difference in online shopping behaviour among selected
background factors (sex, social status, generation, ethnic, household income, education level and zone).
The populations of this research include consumers of 17 years old and above whose chosen by
convenience through mall intercept method. T-test result shows there is significant difference (t=-
3.156, p=0.001) for online shopping practice between men and women. Meanwhile, based on ANOVA result, it shows that there is significant difference between mean scores of different generation [F(3,
1298)= 3.475, p = 0.016], ethnics [F(4, 1291)= 3.678, p = 0.006] and household income [F (4, 1227)=
6.935, p = 0.000]. However, there is no significant difference among mean scores for education level,
zones and stratum (p>0.05). Apart from that, the result also indicates that only five factors taken into
consideration before a particular customer does the online shopping which are safety, products offered,
risk, trustworthy and customers experience. Thus, the sellers should approach their customers in
different ways in order to meet the demand, hence expanding their bussiness.

Matched MeSH terms: Analysis of Variance
Fulltext Effects of polishing systems on surface roughness and colour stability of microhybrid composite resin

Naziah Md Jasin, Fatanah Mohamad Suhaimi, Ahmad Fairuz Omar, Husniyati Roslan

Malaysian Journal of Medicine and Health Sciences, 2018;14(102):1-7.
MyJurnal

Discolouration of microhybrid composite resin is a common problem faced by both dental practitioners and patients. The accumulation of plaque, penetration of colourant particles from foods and beverages, dietary habits and the smoothness of restorations have been known to influence the quality of the aesthetic restoration. The purpose of this study was to determine the effects of polishing systems on surface roughness that led to discolouration of the microhybrid composite resin. Methods: Forty five samples of microhybrid composite resin (Filtex Z100) restorations were polished with two different polishing systems; one-step polishing (OP) system on the distal surface and multiple-step polishing (MP) system on the mesial surface. All samples were then immersed in two common beverages: black coffee and cocoa, for 20 minutes daily throughout 28 days of the experimental period. Results: Data on visual colour measurement and spectrometer colour spectrum was subjected to one-way ANOVA test at a significance level of 0.05. Both solutions were found to cause a significant colour change (p=0.0195) on the microhybrid composite resin. Black coffee solution obtained the highest score (71.6) of visual colour change and the lowest reflectance value (62.818) on the distal surface. Surface roughness evaluation using a scanning electron microscope (SEM) had presented that both polishing systems used produced low level of surface roughness. Conclusion: Although MP system produced a smoother surface compared to OP system, a prolonged exposure to colourant particle found to cause an unacceptable discolouration of microhybrid composite resin.

Matched MeSH terms: Analysis of Variance
Fulltext Microleakage evaluation in teeth restored with experimental dental nanocomposite

Rana K. Al-Bayati, Rao, Gururajaprasad Kaggal Lakshmana, Dasmawati Mohamad, Azman Seeni, Norehan Mokhtar

Malaysian Journal of Medicine and Health Sciences, 2018;14(102):1-6.
MyJurnal

The aim of this study was to evaluate the experimental nanocomposite (Kelfil) against microleakage when bonded with two different types of bonding systems. Methods: Sixty sound extracted human permanent incisors were divided into six groups randomly. Each tooth was prepared with standardised Class III cavity on each proximal surface. The teeth were immersed in Rhodamin B dye for ten hours and sectioned to analyse the depth of dye penetration. The depth of the dye penetration was measured in micrometres by using confocal laser scanning microscope (CLSM). Results: The depth of the dye penetration in the groups was compared by ANOVA test. The results showed comparable microleakage between different types of composites. Conclusion: The experimental nanocomposite (Kelfil) in comparison to the commercially available nanocomposite and micro-hybrid composite has comparable microleakage when bonded using self-etching and total-etched adhesive systems.

Matched MeSH terms: Analysis of Variance
Kesunyian dan kesejahteraan psikologi di kalangan pelajar Universiti di Malaysia

Nordin NM, Mansor AT

Jurnal Psikologi Malaysia, 2009;olume 23:13-21.

This study addresses lhe association between loneliness and psychological well-being among university students in Malaysia. The study used a multistage cluster sample consisting of 1,467 students who came from five Malaysian universities. Psychological well-being variables in this study were measured through the 12-item General Health Questionnaire scale (GHQ-12) by Golberg (1978). The loneliness variables were measured by using the 14- item Revised UCLA Loneliness Scale by Russell, Peplau and Cutrona (1980). The'cut-off point 5/6' for the GHQ-12 was used to determine the level of psychological well-being among the respondents. Correlation and one-way ANOVA analyses were also done. Generally, the main results showe that about 65.6% of university students in Malaysia indicated a good level of psychological well-being and about 34.4% of university students reported having some psychological problems. In addition, about 59.6% of university students reported having a moderate level of loneliness. Based on the Revised UCLA Loneliness Scale scale, a moderate level of loneliness means these students had a moderate level of satisfaction in interpersonal relationships. Other results of significant tests were obtained. Implications of results are also discussed.

Matched MeSH terms: Analysis of Variance
Optimization of injection molding and solvent debinding parameters of stainless steel powder (SS316L) based feedstock for metal injection molding

MUHAMMAD ILMAN HAKIMI CHUA, ABU BAKAR SULONG, MOHD FAZURI ABDULLAH, NORHAMIDI MUHAMAD

Sains Malaysiana, 2013;42:1743-1750.

In this study, injection molding parameters, including green strength, surface quality and green part density, were optimized using the L18 Taguchi orthogonal array. The L25 Taguchi method was used to optimize the green density of solvent debinding parameters. The feedstock consisted of stainless steel powder (SS316L), with powder loading fractions of 63, 63.5 and 64 v/o. The binder compositions used in the study were polyethelene glycol (PEG-73 wt. %), polymethyl methacrilate (PMMA-25 wt. %) and stearic acid (2 wt. %). The Taguchi method was used to optimize the injection parameters. The obtained optimum parameters were as follows: mold temperature of 65oC, injection temperature of 145oC, injection pressure of 650 bar, injection flow rate of 20 m3/s, holding time of 5 s and powder loading of 64% v/o. Analysis of variance results showed that mold temperature has the greatest influence in the production of good green part surface quality and that powder loading gave the best green part strength. Immersion time and temperature were used to optimize for solvent debinding parameters. By optimizing the solvent debinding parameters, an immersion temperature of 61oC and immersion time of 5 h produced the highest density which is the optimum value gain in this study.

Matched MeSH terms: Analysis of Variance
Perbezaan kecemerlangan pelajar dari perspektif pengurusan masa, keputusan akademik terdahulu dan jantina

Hamdan A, Nasir R, Khairudin R, Wan Shahrazad WS

Jurnal Psikologi Malaysia, 2015;olume 29:39-51.

The purpose of this study was to examine and identify whether factors such as previous academic result (SPM), gender and time management could determine differences among students, based on academic performance or grade point average (GPA). A total of 551 undergraduate students from four universities participated in the study. Students with a GPA of 3.50 or greater significantly differed in their level of time management than those with a GPA of less than 2.50. In terms of gender, female students were found to have higher GPA than male students. However, students enrolled with excellent SPM result did not differ significantly in term of their GPA from students enrolled with low SPM result. Results from ANOVA and t-test showed that time management and gender, not previous academic result, were the important factors to distinguish students with low or high academic performance. The implication of this study showed that academic excellence among undergraduates did not rely solely on previous academic result, but the role of time management and gender did play significant factors in distinguishing high achievers vs low achievers.

Matched MeSH terms: Analysis of Variance
Soil properties and variation between three forest types in tropical watershed forest of Chini Lake, Peninsular Malaysia

Khairil M, Wan Juliana WA, Nizam M, Razi Idris W

Sains Malaysiana, 2014;43:1635-1643.

Three forest types were recognized at Chini watershed namely inland, seasonal flood and riverine forests. The soil physico-chemical characteristics from the three forest types were investigated to determine the soil properties variation within a landscape scale. Thirty sampling stations were established, represented by fourteen inland, nine stations in seasonal flood forest and seven in riverine forest. In each station, three soil samples were taken at 0-15 cm depth by using an auger. The study showed 71% of the soil in the inland forest was found to be dominated by clay, 44% of the soil in the seasonal flood forest by clay loam and 42% of the soil in the riverine forest was dominated by silty clay. The pH of all three types of forest studied was acidic and insignificantly different. Organic matter content in the study sites was moderate. The mean of electric conductivity (EC) and cation exchange capacity (CEC) values in the studied soils were low. Based on ANOVA, there were significant differences of the available P and K, K+, Ca2+ and Mg2+ cations and electrical conductivity amongst the three forest types (p<0.05). Cluster analysis showed that the variations of the soil physico-chemical characteristics between the three forest types were low thus indicating that the soil physico-chemical investigated in this study were not the only main contributing factors in floristic variation of the three forest types in Chini watershed.

Matched MeSH terms: Analysis of Variance

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