The impact of (Canarium Odontophyllum Miq.) Dabai Optimum Soaking Condition Towards the Development of Dabai Peanut Spread Physicochemical Properties and Sensory Evaluation

Canarium odontophyllum miq. also known as dabai is known as Sarawak indigenous fruit and utilised for dabai peanut spread formulation. Dabai is physically hard in texture and consumed by soaking under heat treatment. Therefore, dabai optimum soaking condition is determined followed by the development of dabai peanut spread. The determination of soaking condition requires: soaking time (2, 4, 6, 8, 10 and 12) mins and soaking temperature (50°C, 60°C, 70°C and 80°C) as independent variables, and (water absorption, crude protein content, crude fat content, moisture content, ash content and colour) as dependent variables. 50°C for 4 minutes is the optimum dabai soaking condition, and it is being utilised for dabai peanut spread formulation. There were six different formulations with different ratios of soaked dabai and roasted peanut, and further underwent proximate analyses and sensory evaluation test. The combination of a low amount of soaked dabai (40 g) with a high amount of roasted peanut (160 g) has produced a high amount of crude protein (10.65%) and crude fat (35.95%) and was found significantly (p<0.05) acceptable by the panellists. The information obtained provides a better understanding of dabai as a potential food product ingredient

Isolation and molecular identification of Nipah virus from pigs

Nipah viruses from pigs from a Malaysian 1998 out-break were isolated and sequenced. At least two different Nipah virus strains, including a previously unreported strain, were identified. The findings highlight the possibility that the Malaysia outbreaks had two origins of Nipah virus infections

Analysis Of Tool Performance During Ball-End Milling Of Aluminium Alloy 6061-T6

This article presents the tool wear mechanism when machining Aluminium alloy 6061-T6 with PVD coated carbide under dry cutting condition. Cutting parameters selected were cutting speed, Vc = 115-145 m/min; feed rate fz = 0.15-0.2 mm/tooth and depth of cut, ap = 0.5-0.75 mm. The result showed the tool life of PVD TiAlN ranged from 11 to 97 min. Full factorial approach was employed to exhibit relationship between parameter input and output. From the analysis, cutting speed is the most significant factor to tool performance followed by feed rate and depth of cut. Another conclusion is that the most of failure modes occurred were notch wear and flaking near those found near depth of cut line

Optimisation of silicone-based dielectric elastomer transducers by means of block copolymers – synthesis and compounding

Emerging artificial muscle technology has developed from metal-based robotics to softtype robotics made from soft matter. Research into artificial muscle technology based on soft matter has been conducted mainly in order to mimic soft and robust human muscle. In this regard, dielectric elastomers have been studied. Their actuation occurs when Maxwell stress exceeds elastic stress in the presence of an electrical field, resulting in contraction in thickness and planar expansion in the area. As well as an actuator, dielectric elastomers can be used as generators and sensors. As a dielectric elastomer, silicones have been used extensively in many applications, due to favourable properties such as thermal stability, non-conductivity, high gas permeability and low toxicity. However, silicones have a low dielectric constant and thereby low energy density. In order to enhance actuation performance, it is the aim of this research to develop silicone elastomers with a high dielectric constant and high electrical breakdown strength, as well as a low Young’s modulus. In this Ph.D. thesis, two methods were developed to enhance silicone properties such as the dielectric constant and electrical breakdown strength. The first method was devised to enhance the dielectric constant of silicone elastomers through the use of a polydimethylsiloxane-polyethyleneglycol (PDMS-PEG) copolymer, in order to obtain an elastomer with high electrical energy. PDMS-PEG copolymers were synthesised and blended in commercial silicone and subsequently cross-linked. The relative permittivity of cross-linked silicone with 5 wt% of PDMS-PEG copolymers increased by nearly 50%, without compromising dielectric loss and mechanical properties, compared to the commercial silicone elastomer. The second investigated method involved enhancing the electrical breakdown strength of silicone by using an aromatic voltage stabiliser. Here, polyphenylmethylsiloxane (PPMS), which contained aromatic voltage stabilisers, was bonded covalently to PDMS through a hydrosilylation reaction obtaining PDMS-PPMS copolymers. The synthesised copolymers were subsequently cross-linked with a vinyl cross-linker. The obtained cross-linked PDMS-PPMS copolymers were inherently soft and robust with increased electrical breakdown strength (21%) compared to the reference elastomer without an aromatic voltage stabiliser. The conducting polymer was developed through the use of a multi-walled carbon nanotube (MWCNT) in a PDMS-PEG matrix as a compliant electrode of dielectric elastomers. The conductive PDMS-PEG copolymer was incorporated with surface-treated MWCNT, in order to obtain highly conductive elastomer. The prepared sample with 4 parts per hundred rubber (phr) MWCNT was soft and the resulting conductivity of the cross-linked PDMS-PEG copolymer with the addition of MWCNT was high, at 10-2 S cm-1, nearly equivalent to a commonly used commercial conducting polymer. In this thesis, the elastomer and electrode system is referred to as a ‘dielectrielastome

Studies on pathogenicity effect of Aeromonas hydrophila infection in juvenile red hybrid tilapia Oreochromis sp.

This study was conducted to evaluate the ability of motile Aeromonas species (MAS) to induce clinical symptoms and some pathological changes in juvenile red hybrid tilapia. A standard dose of infection was selected based on predetermined LD50. Infected fish were observed for any clinical sign and symptom for 96 hours. Samples of liver, spleen and kidney were collected for histopatological changes due to Aeromonas hydrophila infection. Clinical signs of fish included abnormal swimming behaviour and loss of balance. Most of infected fish suffered from haemorrhagic eyes and lesions on the body surface. Some of the them also developed bilateral exophthalmia. Histopathological changes were observed in kidney, liver and spleen. The infected liver showed severe congestion of hepatic veins and vacuoles formation while anterior kidney manifested degeneration of excretory tubules and glomeruli followed by severe haemorrhages and hyaline droplets degeneration. Spleen on the other hand showed tissues degeneration and vacuoles formation. All targated tissues also showed deposition of haemosiderin pigments followed by proliferation of melanomacrphage centres. Development of such symptoms was associated with the infection with Aeromonas hydrophila. The current study has shown that MAS could serve as the primary cause of severe infection not only in red hybrid tilapia but may also infected other freshwater fish species.The results of histological analysis of various tissues indicates a direct correlation between disease infection and histopathological disorders observed in the tissues

The analysis of road traffic fatality pattern for Selangor, Malaysia case study

Road traffic fatality is a burden towards low- and middle-income countries including Malaysia. Seeing that Selangor has the highest number of road traffic fatalities in Malaysia for the year 2019, therefore the state is selected as a case study. The aim of the article is 1) to understand the road traffic crash pattern and road traffic fatality pattern in Selangor 2) to determine the ability of 16 road traffic features in classifying road traffic fatality occurrence. The preliminary data screening shows that road traffic crash patterns and road traffic fatality patterns in Selangor have many similarities. However, both of them also have few dissimilarities such as crash time of occurrence, day of occurrence, number of vehicles involved in a crash, and type of vehicle first hit for the crash. Supervised machine learning algorithm in Orange data mining software was considered in this analysis. The analysed algorithms among others are neural network, random forest, decision tree, logistic regression, naïve Bayes, and support vector machine. Neural network was seen as the best algorithm to classify road traffic fatality occurrence with 97.0% classification accuracy outperform other algorithms. The result of the article can be used by the relevant traffic stakeholders to execute safety intervention in a more focused manner in Selangor to reduce the number of road traffic fatalities

The effect of motorcycle helmet type on head response in oblique impact

In Malaysia, riding motorcycles is a popular mode of transportation, particularly in urban areas where traffic congestion is prevalent. Additionally, motorcycles are relatively affordable and have low fuel consumption, which makes them an attractive option for many. Per Malaysian traffic laws, riders must wear helmets while riding. As a result, various brands and types of helmets are available for purchase. However, with the increasing popularity of online shopping platforms, many individuals opt to purchase helmets online despite the uncertain quality control of these products. This study aims to assess the effectiveness of three different types of motorcycle helmets in protecting the head from injury. The helmet types evaluated in this unbiased study include full-face, open-face, and half-coverage helmets. The head injury predictors used in this study include Peak Linear Acceleration (PLA), Peak Rotational Acceleration (PRA), Head Injury Criterion (HIC), and Brain Injury Criterion (BrIC). Each helmet was subjected to an impact in a controlled environment using a 6-kg cylinder attached to a pendulum arm, with the impact directed at the front of the helmet at a speed of approximately 6 m/s. Full-face and open-face helmets performed exceptionally well in terms of linear parameters (PLA and HIC). The PLA and HIC of half-coverage helmets are nearly 70% and 50% higher than full-face and open-face helmets. All helmets perform poorly against rotational impact (PRA and BrIC). This shows that helmet design needs to be improved to enhance protection against rotational impact. This study represents the first case study in Malaysia to gather mechanical head injury data comparing the protective performance of different helmet types under both linear and rotational impact. These findings may provide a more accurate understanding of helmet performance in protecting against head injuries

Genotoxicity In Chironomus Kiiensis (Chironomidae: Diptera) after Exposure To Polluted Sediments from Rivers of North Peninsular Malaysia: Implication For Ecotoxicological Monitoring

Rapid industrialization and urbanization has led to increasing input of chemical contaminants into the aquatic environment of Malaysia. Despite the threat civilization poses to the biota, there are still very few relevant studies on ecotoxicological testing of river ecosystems. To overcome this knowledge gap,we examined lethal and genotoxic effects of sediments fromdifferent rivers of the northernMalaysia against Chironomus kiiensis, a group well represented in the aquatic fauna of this region.We exposed the larvae to sediments from Selama River (SR), Permatang Rawa River (PRR) and Kilang Ubi River (KUR) at various durations (0, 6, 12, 24 and 48 h). The larval mortality was monitored, whereas DNA damage in survivors’ cells was determined using the comet assay. Pollution level indexed by the amounts of heavy metals and other organic contaminants in the sediment showed progressive increases from SR to PRR to KUR. Highly polluted sediments (PRR to KUR) were detrimental to C. kiiensis larvae, most of which did not survive following exposure for long periods. DNA analyses revealed greater damages in nuclei derived from larvae maintained on polluted sediments, in particular, those from KUR. The effects on the genomic material of C. kiiensis larvae occurred in a timedependent manner, with damage level increasing as exposure time progressed. Our results highlight the genotoxic properties of polluted sediments.More importantly, this study showed that C. kiiensis larvae could respond to different levels of pollution with respect to exposure time. It is concluded that C. kiiensis larvae is a potential candidate for river ecotoxicological monitoring

Eating behaviours of normal and overweight female undergraduate students in positive and negative emotions

Emotional well-being affects eating behaviour, whether making an individual eat less or more than they normally do. This paper aimed to compare eating behaviour between normal and overweight female undergraduate students in response to positive and negative emotions. This cross-sectional study was conducted among 166 female university students. Data collection involved the assessments of participants’ anthropometric measurements to obtain body mass index (BMI) and two self-administered questionnaires to measure of eating behaviour in positive and negative emotions; Emotional Appetite Questionnaire (EMAQ) and Eating Junk Food Questionnaire (EJFQ). Data from the two groups were compared to obtain differences in eating behaviour between normal and overweight female undergraduate students in response to positive and negative emotions. Both normal (Mean = 5.96±1.05) and overweight (Mean = 5.60±0.81) participants reported no changes in the levels of eating under positive emotions. The results also showed that both BMI categories “ate less” when they experienced negative emotions. For EJFQ, there was no significant difference in eating junk food between normal and overweight participants in response to positive emotions. However, the results revealed that the overweight group has more tendency to choose pizza (X2(1) = 6.879), p = 0.009) and cake (X2(1) = 7.458, p = 0.006) than the normal group under negative emotions. These results offer an insight that both BMI groups have almost similar eating-related concerns and thus intervention programs can be constructed on distressing eating-related thoughts and emotions among female undergraduate students

Legal considerations on OTEC deployment in Malaysia

It is predicted that the world’s primary energy demand would rise to 37% higher by the year 2040, and this would consequently increase current pressures on the global energy system. This would in turn make renewable energy more viable against non-depletable and sustainable energy. Malaysia has made an effort to meet this energy forecast by reducing the reliance on biomass for energy production, and is committed in making it a reality. The ocean thermal energy-driven development based on the ocean thermal energy conversion technology (OTEC) has great potential in leading the Malaysian renewable energy industry. However, this cannot effectively take place until certain legal impediments are identified. Thus, a legal analysis must be conducted to provide the Malaysian government or any government authority in the world to be aware of such legal impediments in ensuring success of their OTEC venture. Given the industry is at its infant stage, such a legal review is hoped to eventually promote further legal analysis on OTEC-related activities