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Feasibility of Group Risk Income Protection Insurance for Para Rubber in Thailand
DUANGMANEE, Krittiya Korea Distribution Science Association 2020 The Journal of Asian Finance, Economics and Busine Vol.7 No.10
The study investigates a promising sustainable crop-insurance risk mitigation plan, namely, Group Risk Income Protection (GRIP) insurance, for the cultivation of Para rubber, a crop for which Southern Thailand constitutes over half of the national harvested area, but which recently experienced a shift in prices and yields, substantially affecting farmers. The research takes as its starting point historical data covering the 2001-2018 period for this crop's cultivation in three of Thailand's Andaman South Coast provinces - Trang, Krabi, and Phangnga. The results indicate that, from a relatively high base in 2001, Trang's yields dropped sharply before a more gradual decline (apparently still ongoing), whereas those for Krabi and Phangnga followed a smoother downward trajectory throughout the period. Meanwhile, prices everywhere rose steadily before falling from 2011 onwards - a decrease that shows no signs of abating. The yield/price relationship was negative for one province and slightly positive for the other provinces. Furthermore, all provinces' Para rubber income initially grew continually but fell after 2011, with this trend seemingly persisting to this day. The paper's findings suggest that, after early moves to entrench GRIP insurance, it looks set to become a feasible option for Para rubber, making policy agreement details an interesting subject for subsequent investigations.
Kullanart Obsuwan,Apisak Duangmanee,Chockpisit Thepsithar 한국원예학회 2019 Horticulture, Environment, and Biotechnology Vol.60 No.2
We established a protocol for mass propagation of Thyrsostachys siamensis Gamble in vitro culture via callus formation. Single node cuttings were placed in Murashige and Skoog (MS) medium with benzyl adenine (BA) concentrations rangingfrom 0 to 44.40 μM. Although multiple shoots formed in all BA treatments, optimum shoot formation occurred at 11.10 μMBA. The MS medium for optimum callus induction from the multiple shoots contained 11.3 μM of 2,4-dichlorophenoxyaceticacid (2,4-D), 4.65 μM kinetin, and 1.96 μM indole-3-yl-butyric acid (IBA). The highest number of shoots regenerating fromthe callus was obtained in MS medium containing 11.1 μM N 6 -BA and 3.43 μM IBA. Shoot clusters of 3–5 shoots wererooted on MS medium supplemented with 26.85 μM 1-naphthaleneacetic acid for 3 weeks, and were then transferred ontoMS medium without plant growth regulators for 1 week. This protocol can be used for gene manipulation in a breedingprogram, germplasm preservation, and mass propagation of the bamboo.
Tailoring Cu2xTe quantum-dot-decorated ZnO nanoparticles for potential solar cell applications
Auttasit Tubtimtae,Surachet Phadungdhitidhada,Duangmanee Wongratanaphisan,Atcharawon Gardchareon,Supab Choopun 한국물리학회 2014 Current Applied Physics Vol.14 No.5
Cu2xTe QDs on ZnO nanoparticles were synthesized using a successive ionic layer absorption and reaction technique (SILAR) at room temperature. The as-synthesized QDs which were distributively deposited on ZnO nanoparticles surface were characterized by field emission scanning electron microscope (FE-SEM), X-ray diffraction and high-resolution transmittance microscope (HR-TEM). It revealed that the average diameter of the QDs was w2 nm. The synthesized Cu2xTe QDs were solely orthorhombic Cu1.44Te phase. The growth mechanism was supposed that it based on ions deposition. The energy gap of as-synthesized Cu2xTe QDs was determined w1.1 eV and the smallest energy gap of 0.76 eV was obtained, equal to that of bulk material. Raman spectroscopy and FTIR were also used to study the Cu2xTe QDs on ZnO nanoparticles. These characteristics suggest a promising implication for a potential broadband sensitizer of QDSCs.
Sutthipoj Sutthana,Kritsada Hongsith,Pipat Ruankham,Duangmanee Wongratanaphisan,Atcharawon Gardchareon,Surachet Phadungdhitidhada,Dheerawan Boonyawan,Pisist Kumnorkaew,Adisorn Tuantranont,Supab Choopu 한국물리학회 2017 Current Applied Physics Vol.17 No.4
An interfacial modification of CH3NH3PbI3/PCBM is investigated by pre-heating PCBM solution before spin-coating on the CH3NH3PbI3layer.By adjusting PCBM concentration, PCBM films were optimized to form homogeneous films. Besides, the pre-heat treatment of PCBM solution exhibits a better covered area over CH3NH3PbI3 layer with reduced pinhole compared with the non-heat treatment. This can be explained by the higher thermal energy PCBM molecules of the pre-heat solution leading to higher molecule mobility that can reorganizes a structural as well as enhance the diffusion and enhance coverage of PCBM films over CH3NH3PbI3. The optimized cell is enhanced with average power conversion efficiency from 4.59% up to 5.76% (6.44% maximum) by heat treatment. To investigate interface between CH3NH3PbI3 and PCBM, the contact angle was measured and found that the contact angle of PCBM films were higher after heat treatment suggesting re-alignment and better orientation of PCBM on perovskite film. The better orientation of PCBM can be explained in term of hydrophilic/hydrophobic property of the interface between CH3NH3PbI3 and PCBM. These results suggest that pre-heat treatment of PCBM solution has ability to modify the interface for better orientation of PCBM and resulting in efficiency enhancement due to better carrier transport direction at the CH3NH3PbI3/PCBM interfaces for perovskite solar cells. In addition, the better orientation that the head (non-polar)is oriented at outer surface can also prevent the solar cells from surrounding moisture.
Potential Methane Production on Anaerobic Co-digestion of Swine Manure and Food Waste
Shin, Joung-Du,Park, Sang-Won,Kim, Sang-Hyoun,Duangmanee, Jack,Lee, Po-Heng,Sung, Shi-Hwu,Lee, Bong-Hoon The Korean Society of Environmental Agriculture 2008 한국환경농학회지 Vol.27 No.2
Anaerobic co-digestion of swine manure and food waste for biogas production was performed in serum bottles at various volatile solids(VS) contents and mixing ratios of two substrates(swine manure:food waste=$100:0{\sim}0:100$). Through kinetic mode of surface methodology, the methane production was fitted to a Gompertz equation. The ultimate methane production potential of swine manure alone was lower than that of food waste regardless of VS contents. However, it was appeared that maximum methane production potentials in 80 : 20 of the mixing rate at VS 3% was enhanced at 144.7%, compared to its only swine manure. The potential increased up to 815.71 ml/g VS fed as VS concentration and food composition increased up to 3.0% and 20%, respectively. The ultimate amount of methane produced had significantly a positive relationship with that of methane yield rate. Overall, it would be strongly recommended that feeding stocks use 20% of mixing ratio of food waste based on VS 3% contents when operating the anaerobic reactor on site at $35^{\circ}C$ if not have treatment of its anaerobic waste water.
SnO_2 nanowires mixed nanodendrites for high ethanol sensor response
Surachet Phadungdhitidhada,Suvit Thanasanvorakun,Pongsri Mangkorntong,Supab Choopun,Nikorn Mangkorntong,Duangmanee Wongratanaphisan 한국물리학회 2011 Current Applied Physics Vol.11 No.6
Mixed morphology of SnO_2 nanowires and nanodendrites was synthesized on the gold-coated alumina substrates by carbothermal reduction of SnO_2 in closed crucible. The products were characterized by scanning electron microscopy, x-ray diffractometer, and transmission electron microscopy. Results showed the SnO_2 nanowires and the SnO_2 nanodendrites branched out from the main nanowires. Both SnO_2 nanostructures were pure tetragonal rutile structure. The nanowires were grown in [101] and [121]directions with the diameter of 50―150 nm and the length of a few 10 μm. The nanodendrites were about 100―300 nm in diameter. The growth mechanism of the SnO_2 nanostructures was also discussed. Characterization of ethanol gas sensor, based on the mixed morphology of the SnO_2 nanostructures, was carried out. The optimal temperature was about 360 ℃ and the sensor response was 120 for 1000 ppm of ethanol concentration.