Hemicellulosic polymer from Vetiver grass and its physicochemical properties

Methacanon, Pawadee; Chaikumpollert, Oraphin; Thavorniti, Parjaree; Suchiva, Krisda

doi:10.1016/s0144-8617(03)00182-6

Cited by 57 publications

(26 citation statements)

References 10 publications

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“…According to Methacanon et al (2003), silica content of V. zizanoides leaves is about 50%. This inorganic component not only affects positively plants growth but also confers to them a certain resistance against phytophagous insects and other wood eating microorganisms (Djamin and Pathak, 1967;Massey et al, 2007).…”

Section: Discussionmentioning

confidence: 99%

Termiticidal activities of few plant extracts against Macrotermes subhyalinus smeathman and Trinervitermes geminatus wasmann (Isoptera: Termitidae) survival

Kasseney¹,

Nyamador²,

Mondedji³

et al. 2016

Afr. J. Agric. Res.

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Termites are most pestiferous insects causing damage to crop and buildings. Their control still relies mainly on harmful chemical pesticides to the detriment of eco-friendly pesticides. The aim of this study was to evaluate the effect of three plant extracts on the survival rate of termite species, Macrotermes subhyalinus Smeathman and Trinervitermes geminatus Wasmann, known to cause damage to crops, vegetation and buildings in Togo. Cissus quadrangularis (Vitaceae), Pennisetum purpureum Schumach (Poaceae) and Vetiveria zizanoides Nash (Poaceae) extracts were examined for their termiticidal activity against these termites. Three formulations including acetone and hexane extracts and powder were prepared for each plant species at five different concentrations. Six replicas were made for each tested concentration with 30 workers per replica in the laboratory conditions. All the tested plants showed termiticidal activities by reducing the rate of survival duration of tested termites. The powder of V. zizanoides was very effective on M. subhyalinus; its lowest concentration (5 mg/cm 2 ) reduced the survival rate of this termite by up to 87%. Among the extracts, acetone extract of P. purpureum caused the highest reduction of M. subhyalinus survival rate at higher concentration. Both acetone and hexane extracts of V. zizanoides were very effective on T. geminatus, reducing by more than 90% survival rate of this termite. Although these plants extract seem to bear potential termiticidal activity, however, further studies need to be carried out in order to determine their respective components.

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Section: Discussionmentioning

confidence: 99%

Termiticidal activities of few plant extracts against Macrotermes subhyalinus smeathman and Trinervitermes geminatus wasmann (Isoptera: Termitidae) survival

Kasseney¹,

Nyamador²,

Mondedji³

et al. 2016

Afr. J. Agric. Res.

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“…The transmittance peaks shoulder between the wave number of 890-1131 cm -1 is attributed to C-O-C stretching whereas the indicative peak at 1080cm -1 is related to the ß-glycosidic bond or linkages [20]. This region is associated with the typical hemicellulose decomposition and the distinguished peak of 1080cm -1 described the cellulosic degradation [16], [21].…”

Section: E Fourier Transform Infrared (Ftir) Spectramentioning

confidence: 97%

The Valorization of Rice Waste via Torrefaction Method

Teh¹,

Madusari²

2016

IJCEA

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Abstract-Biomass plays a crucial role as the source of renewable carbon which can be utilised in the production of biofuels. However, the raw biomass itself has some undesirable properties such as high moisture content, low energy density and deterioration after a short duration of storing period. Hence, a thermochemical process, known as torrefaction is normally used to preliminary treat the biomass to enhance its physical properties. This study focus on the characterization of the physical properties of the torrefied rice biomass which are rice husk and rice straw under three different temperatures of 220 °C , 250 °C and 280 °C with residence time of 30 min.The heating rate was set as 15 °C /min after the temperature profile study on the customized reactor was investigated. From the experimental results, it is noticeable that torrefaction enhances the calorific value of the biomass by 3-17% for rice husk and 4-20% for rice straw. The torrefied rice-based biomass also helps to remove the moisture content of raw rice husk and rice straw by 6.5% and 8.3% respectively. The mass yield of the torrefied rice-based biomass is between the range of 78-91% for rice husk and 82-90% for rice straw. Meanwhile, the energy yield for rice husk is in the range of 92-94% and 93-98% for rice straw after torrefaction. This study concludes that 250 °C is the optimum torrefaction temperature for the conversion of rice waste into valuable biofuel.

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“…Further, the roots of vetiver grass are commercially used for oil extraction. The fragrant vetiver oil is a valuable precursor of perfumery and cosmetics industry [9], [10]. According to statistics, the oil yield is estimated around 1%wt.…”

Section: Introductionmentioning

confidence: 99%

Using of TiO2-Coated Mesoporous Particles for Organic Dye Removal

Le¹,

Trinh²,

Channei³

et al. 2016

IJESD

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Abstract-In the present work, mesoporous particles was produced by calcining vetiver leaves at 600°C. Then, it was coated by TiO 2 using sol-gel method. The crystal structure of TiO 2 coated particle was investigated using X-Ray Diffraction (XRD) technique. The organic dye removal efficiency were examined using photodegradation of methylene blue (MB) under UV-A irradiation. The pure TiO 2 particle reached only 40% of organic dye removal in 6 hours of irradiation time. On the other hand, the TiO 2 -coated mesoporous particles got >90% of organic dye removal in 6 hour of irradiation time. It can be said that the organic dye removal efficiency of TiO 2 -coated particles was higher than pure TiO 2 particles. This outcomes suggested that the adding of produced mesoporous particles increased the efficiency of MB adsorption, leading to the improvement of photocatalytic activity.

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Hemicellulosic polymer from Vetiver grass and its physicochemical properties

Cited by 57 publications

References 10 publications

Termiticidal activities of few plant extracts against Macrotermes subhyalinus smeathman and Trinervitermes geminatus wasmann (Isoptera: Termitidae) survival

Termiticidal activities of few plant extracts against Macrotermes subhyalinus smeathman and Trinervitermes geminatus wasmann (Isoptera: Termitidae) survival

The Valorization of Rice Waste via Torrefaction Method

Using of TiO2-Coated Mesoporous Particles for Organic Dye Removal

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