KMITL

Permanent URI for this communityhttps://dspace.kmitl.ac.th/handle/kmitl/1

Browse

Settings

Subject: search.filters.subject.Gelling agent

Search Results

Now showing 1 - 2 of 2
  • Loading...
    Thumbnail Image
    Some of the metrics are blocked by your 
    consent settings
    Item type:Publication,
    IN VITRO MICROPROPAGATION OF SIAMESE ROSEWOOD DALBERGIA COCHINCHINENSIS PIERRE, A TIMBER YIELDING TREE
    (2022-01-01)
    Potchara, Supapas
    ;
    Parinyapong, Chareonsap Piyarat
    ;
    Anurug, Poeaim
    Dalbergia cochinchinensis, a woody legume, is a high-value timber-yielding tree that is important for both ecological and commercial purposes. To allow efficient In vitro micropropagation, we evaluated the efficiency of plant growth regulators (including kinetin, gibberellic acid, and thidiazuron), different basal media (¼ Murashige and Skoog medium (MS), ½ MS, 1 MS, 2 MS, ¼ woody plant medium (WPM), ½ WPM, 1 WPM, and 2 WPM), gelling agents (phytagel, crystal agar gel G180, food grade agar powder, and bacteriological grade agar powder), and carbon sources (sucrose and glucose) for shoot induction in D. cochinchinensis. Nodal segments, derived from the shoots of 1-year old trees, were surface sterilized and used. Shoots induced by gibberellic acid showed the highest shoot length (17.28 ± 0.20 mm) but were thin, pale green, and displayed shoot tip necrosis. However, shoots induced by kinetin were shorter (15.20 ± 0.41 mm) but were greener and more vigorous. The best conditions for improving shoot induction and elongation were 30 g/L sucrose and 2.6 g/L phytagel. In vitro microshoots were rooted on half-strength WPM augmented with 0.05 mg/L indoleacetic acid. After 1 month of culture, the highest number of roots per shootlet was 6.8 ± 0.58, with an average root length of 54.76 ± 5.22 mm. The plantlets were acclimatized in coconut husks with an 80% survival rate.
  • Loading...
    Thumbnail Image
    Some of the metrics are blocked by your 
    consent settings
    Item type:Publication,
    Effect of carrageenan on properties of biodegradable thermoplastic cassava starch/low-density polyethylene composites reinforced by cotton fibers
    (2014-01-01)
    Prachayawarakorn, Jutarat
    ;
    Pomdage, Wanida
    Applications of biodegradable thermoplastic starch (TPS) have been restricted due to its poor mechanical properties, limited processability and high water uptake. In order to improve properties and processability, thermoplastic cassava starch (TPCS) was compounded with low-density polyethylene (LDPE). The TPCS/LDPE blend was, then, modified by a natural gelling agent, i.e. carrageenan and natural fibers, i.e. cotton fibers. All composites were compounded and processed using an internal mixer and an injection molding machine, respectively. It was found that stress at maximum load and Young's modulus of the TPCS/LDPE composites significantly increased by the addition of the carrageenan and/or the cotton fibers. The highest mechanical properties were obtained from the TPCS/LDPE composites modified by both the carrageenan and the cotton fibers. Percentage water absorption of all of the TPCS/LDPE composites was found to be similar. All modified composites were also degraded easier than the non-modified one. Furthermore, all the composites were analyzed using Fourier-transform infrared spectroscopy (FTIR), X-ray diffraction (XRD) and Scanning electron microscopy (SEM). © 2014 Elsevier Ltd.
      1