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Articles by Amru Nasrulhaq Boyce
Total Records ( 4 ) for Amru Nasrulhaq Boyce
  A.B.M. Sharif Hossain , Aishah Salleh , Amru Nasrulhaq Boyce , Partha chowdhury and Mohd Naqiuddin
  Biodiesel is biodegradable, less CO2 and NOx emissions. Continuous use of petroleum sourced fuels is now widely recognized as unsustainable because of depleting supplies and the contribution of these fuels to the accumulation of carbon dioxide in the environment. Renewable, carbon neutral, transport fuels are necessary for environmental and economic sustainability. Algae have emerged as one of the most promising sources for biodiesel production. It can be inferred that algae grown in CO2-enriched air can be converted to oily substances. Such an approach can contribute to solve major problems of air pollution resulting from CO2 evolution and future crisis due to a shortage of energy sources. This study was undertaken to know the proper transesterification, amount of biodiesel production (ester) and physical properties of biodiesel. In this study we used common species Oedogonium and Spirogyra to compare the amount of biodiesel production. Algal oil and biodiesel (ester) production was higher in Oedogonium than Spirogyra sp. However, biomass (after oil extraction) was higher in Spirogyra than Oedogonium sp. Sediments (glycerine, water and pigments) was higher in Spirogyra than Oedogonium sp. There was no difference of pH between Spirogyra and Oedogonium sp. These results indicate that biodiesel can be produced from both species and Oedogonium is better source than Spirogyra sp.
  A.B.M. Sharif Hossain , Amru Nasrulhaq Boyce and Haji Mohamed A. Majid
  The study was conducted to investigate the effect of ethanol at different concentrations (ET) on bougainvillea flower longevity and delay senescence in storage condition. The treatments were water control, 2, 4, 8, 10, 20, 30, 40, 50 and 70% ET. Flower longevity was 2 days more in 4, 8 and 10% ethanol than water control and other concentrations of ethanol. Petal wilting and senescence were occurred 2 days later in 4, 8 and 10% ET than in water control. Percent petal’s color changed was later in water 4, 8 and 10% than in control, 2, 20, 30, 40, 50 and 70% ET. Chlorophyll fluorescence intensity (photosynthetic yield) followed by time (ms) at different ethanol concentrations was higher in 4, 8 and 10% ET than in water control and other concentrations. Fo (lower fluorescence) was lower in 4, 8 and 10% ET than in water and other concentrations. However, Fm and Fv [(higher fluorescence and relative variable fluorescence (Fm-Fo)] were higher in 4, 8 and 10% ET than in other ET concentrations. Fv/Fm (quantum yield or photosynthetic yield) was higher in 4, 8 and 10% ET than in other ET concentrations. The result showed flower vase life was significantly affected by ethanol concentrations and longevity was higher in 4, 8 and 10% ethanol than in water control and other concentrations.
  Ali Majrashi , Mohammad Moneruzzaman Khandaker , Baki Bin Bakar and Amru Nasrulhaq Boyce
  Scirpus grossus L. is a principal rhizomatous weed in the rice fields, drainage and irrigation canals, river banks, abandoned rice fields and wasteland in Malaysia. This study provides evidences that plants of S. grossus have a remarkable ability to alter their development in response water depth regimes. This phenotypic plasticity allows them to continually adapt to their local environment, a necessity for plants as sessile organisms. The results of this current study showed that devoid of fertilizer application (F0) and not inundated, S. grossus plants with mean monthly population counts up to 16 weeks, taken at 4-weekly intervals were as follows: 61.33, 67.33, 75.33 and 117.00 plants m–2. With fertilizer applications, the parallel counts for F2 (64.67, 71.00, 80.33 and 34.33 plants m–2), F3 (65.33, 72.67, 68.33 and 32.00 plants m–2), F4 (71.67, 72.00, 71.67, 6.33 plants m–2), F5 (79.33, 74.67, 52.00 and 0.00 plants m–2), denoting increased mortality of ramets with increased fertilizer applications. Ramet mortality of S. grossus increased with the greater depths of the water level and with increasing NPK concentrations. It was also observed that population number of ramets decreased with increased depths of inundation, irrespective of fertilizer regimes. In relation to plant height, recorded results showed that plant height was highest in the 10 cm water depth treatment followed by 20, 5 and 0 cm water depth treatments, respectively. It can be concluded that depth of inundation and fertilizer regimes have significant effects on aerial growth and ramets mortality of Scirpus grossus.
  Siti Zuriani Ismail , Mohammad Moneruzzaman Khandaker , Nashriyah Mat and Amru Nasrulhaq Boyce
  There is increasing concern about the effects of hydrogen peroxide (H2O2) on plant growth and development as well as fruit quality, worldwide. Hydrogen peroxide is produced predominantly in plant cells during photosynthesis and photorespiration and also in respiration processes. It is most stable of so-called Reactive Oxygen Species (ROS) and therefore, plays crucial role as signaling molecule in various physiological process. Increment of intra- and intercellular levels of H2O2 give effect on growth, development and quality of fruits with the optimum concentration of H2O2 application. In this study the effects of H2O2 on growth, development and quality of importance fruit production were discussed. The past research was also discussed about the effects of H2O2 on germination of seedling until maturation, flowering and fruiting stage and fruit quality during pre-harvest and postharvest storage behavior.
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