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All Journal BIOTROPIA - The Southeast Asian Journal of Tropical Biology 3BIO: Journal of Biological Science, Technology and Management Current Research on Biosciences and Biotechnology
Robert Manurung
School Of Life Sciences And Technology, Institut Teknologi Bandung
Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Immunology & microbiology Materials Science & Nanotechnology Medicine & Pharmacology Neuroscience Veterinary

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Increase of Silica Recovery by Lignocellulose-degrading Enzyme Complex from Cow Rumen Fluid in a Reactive Extraction of Oryza sativa L. Husk Robert Manurung; Muhammad Rizki Fajar Ilhamy; Khairul Hadi Burhan
3BIO: Journal of Biological Science, Technology and Management Vol. 2 No. 2 (2020)
Publisher : School of Life Sciences and Technology, Institut Teknologi Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5614/3bio.2020.2.2.4

Abstract

Silica is one of the beneficial nutrients and has various essential roles to cope with stresses situation in the graminaceous plant. The availability of Si on earth is abundant however the form that can be readily uptake by the plant is limited, and without external addition, the silica content in the cultivated land would be depleted and decreasing plant growth, recycle Si from the decaying plant is a better alternative to protect from that situation. Rice husk is a leftover paddy by-product having significant Si content that can be reused. This study offered a biological way to treat the rice husk using rumen fluid as a better alternative to the high energy consuming thermal procedure. Rice husk was macerated in rumen fluid, the kinetic and model of lignocellulose degradation were evaluated. The study in Si release in liquid media i.e. 0.05 M hydrochloric acid, 0.1 citric acid and aquades, and Si extraction in alkaline solution 1 M KOH using the rumen-treated husk showed that this method could be a better alternative to develop high Si content of solid and liquid fertilizer, respectively.
Effect of tree age on the yield, productivity, and chemical composition of essential oil from Cinnamomum burmannii Anugerah Fajar; Ganjar Abdillah Ammar; Muhammad Hamzah; Robert Manurung; Muhammad Yusuf Abduh
Current Research on Bioscences and Biotechnology Vol. 1 No. 1 (2019)
Publisher : Institut Teknologi Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5614/crbb.2019.1.1/SCDI5665

Abstract

One of the factors that influence the yield of cassia oil is the age of tree. Cassia bark is normally harvested at a tree age of 5 years old and continue to be harvested until 15 years of age. This study investigated the effect of tree age of Cinnamomum burmannii (5, 12 and 20 years old) on the yield, productivity and chemical composition of essential oil from leaf, branch and trunk bark. The essential oil was extracted using steam distillation and liquid-liquid extraction methods. The results showed that the optimum yield of Cinnamomum burmannii oil was obtained when the water content was in the range of 36-47%. The optimum yield of essential oils from the leaf was obtained at 1.36±0.31 wt% (5 years old) and for the branch and the trunk bark were obtained at 3.2±0.07 wt% and 2.95±0.30 wt% (both were 12 years old). Chemical composition of the essential oil was also analysed. The major components of Cinnamomum burmannii oil were determined as cinnamaldehyde (68.3%-82%), cinnamyl acetate (2.5%-16%), cinnamyl alcohol (2.25%-4.6%), and cinnamic acid (3%-8%). The productivity of essential oil was estimated at 336 kg/ha.year (5 years old), 577 kg/ha.year (12 years old) and 387 kg/ha.year (20 years old).
A review on community scale stationary and mobile production of biodiesel Muhammad Yusuf Abduh; Robert Manurung; Hero Jan Heeres; Noor Illi Mohamad Puad
Current Research on Bioscences and Biotechnology Vol. 2 No. 2 (2021)
Publisher : Institut Teknologi Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5614/crbb.2021.2.2/BGXO5487

Abstract

Biodiesel has been commercially produced on a large scale, but its application is still limited primarily due to its production cost, which is relatively more expensive than that of fossil fuel. Recently, there has been an ongoing parallel development whereby biodiesel production is carried out on a community scale, including a mobile production unit of biodiesel with local input and demand. The produced biodiesel is often intended for use by the concerned local community, which greatly reduces logistics and transportation cost. A mobile biodiesel unit typically consists of biodiesel processing units placed inside a truck which can travels from one location to another particularly to the source of the feedstock. This article reviews the community scale production of biodiesel carried out in mobile biodiesel units and at fixed locations. These include pre-treatment of the feedstock such as isolation of oil from oilseeds and quality control of oil prior to the reaction unit, the reactor technology to produce crude biodiesel as well the post treatment for producing the refined biodiesel that meets the international specification. This paper also discusses the cost for producing biodiesel in a community scale particularly for the case of a mobile biodiesel unit. The production cost varies from $0.76-1.12/l. This range is still not yet competitive to the current average price of approximately $0.98/l of diesel around the world. The production cost may be reduced by applying a biorefinery concept that is economically attractive with an environmental benefit.
INFLUENCE OF WATER STRESS AND PLANT AGE ON THE YIELD AND CHEMICAL COMPOSITION OF ESSENTIAL OIL FROM Cymbopogon winterianus Jowitt Muhammad Yusuf Abduh; Izni Nur Ibarahim; Ulya Atika; Robert Manurung; Dedi Suheryadi
BIOTROPIA Vol. 27 No. 1 (2020): BIOTROPIA Vol. 27 No. 1 April 2020
Publisher : SEAMEO BIOTROP

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.11598/btb.2020.27.1.1152

Abstract

Citronella oil, which is also known as Java citronella oil, is typically obtained from the leaves of Cymbopogon winterianus Jowitt and has been widely used as an antiseptic, fragrance, flavor, and many other applications. However, systematic studies on the factors affecting the yield and composition of citronella oil are limited. Hence, this study was carried out to investigate the influence of water stress (low to high) and plant age (0.5 to 5 years) on the yield and composition of citronella oil. Citronella leaves were dried at room temperature (26–30 °C) with a relative humidity of 62–74% for 3 days before the citronella oil was extracted using a steam distillation unit. Introducing a high water stress condition to the plants increased the yield from 0.80% (control) to 1.4% (high water stress) dry weight. The geraniol content slightly increased from 15% to 17%, whereas the citronellal content considerably increased from 31% to 44% when the plants were subjected to high water stress in comparison to the control. The oil yield increased with plant age before it reached its plateau at 3.5% dry weight at age 4 years. However, the composition of citronella oil did not significantly vary with plant age.
Co-Authors Abduh, Muhammad Yusuf Anugerah Fajar Dedi Suheryadi Ganjar Abdillah Ammar Hero Jan Heeres Izni Nur Ibarahim Khairul Hadi Burhan Muhammad Hamzah Muhammad Rizki Fajar Ilhamy Muhammad Yusuf Abduh Noor Illi Mohamad Puad Ulya Atika