The Effects of Working Experience Practicum to Strengthen Students’Self-determination Behaviors in Practicum Subject of Business and Computer Education Major,Faculty of Education,Kasetsart University

The research purpose was to study the effects of working experience practicum to strengthen students’self-determination behaviours.Research population were 23 students in 3rd year in Business and Computer in Vocational Education Department,Faculty of Education,Kasetsart University who registered to study in Practicum Subject in 2016 academic year.Three research instruments were conducted,including,(1)Practicum Manual,(2)Interview Form,and(3)Focus Group Discussion Sheet.Research instruments were verified by four experts who were in four academic areas,including(1)humanity,(2)psychology,(3)business,and(4)human resource by using content validity method.Interview session was divided by 10 groups of companies in which students did their work for 10 weeks.Focus group was administered to discuss with 23 students and share about working problems and solutions.Qualitative data were analyzed by content analysis method,including data analysing,ordering and grouping,and data linking of working practicum.The research results were shown that students learned to understand benefits and limitations of self-determination behaviors and awareness in the essentials of self-determination in four aspects,including(1)attention and responsibility in working achievements,(2)working diligent and tolerance,(3)self-determination with learning motivation,and(4)self-development.The guidelines to encourage students’self-determination behaviors suggested that students should apply Buddha’s teaching(four-step secret of successful working achievements)to achieve their work and adjust students’real life behaviors.Furthermore,researcher presented the best practice guidelines to promote students’self-determination behaviors,including(1)students should think positively to spend time on hardworking and tolerance,(2)students should develop their work through PDCA(Plan,Do,Check,Action)techniques to adjust their work to do better,(3)students should be promoted with skills of 21st century that are necessary to raise students’self-development through teaching and learning in and out of classroom.

Quantification of the adulteration concentration of palm kernel oil in virgin coconut oil using near-infrared hyperspectral imaging

The adulteration concentration of palm kernel oil(PKO)in virgin coconut oil(VCO)was quantified using near-infrared(NIR)hyperspectral imaging.Nowadays,some VCO is adulterated with lower-priced PKO to reduce production costs,which diminishes the quality of the VCO.This study used NIR hyperspectral imaging in the wavelength region 900-1,650 nm to create a quantitative model for the detection of PKO contaminants(0-100%)in VCO and to develop predictive mapping.The prediction equation for the adulteration of VCO with PKO was constructed using the partial least squares regression method.The best predictive model was pre-processed using the standard normal variate method,and the coefficient of determination of prediction was 0.991,the root mean square error of prediction was 2.93%,and the residual prediction deviation was 10.37.The results showed that this model could be applied for quantifying the adulteration concentration of PKO in VCO.The prediction adulteration concentration mapping of VCO with PKO was created from a calibration model that showed the color level according to the adulteration concentration in the range of 0-100%.NIR hyperspectral imaging could be clearly used to quantify the adulteration of VCO with a color level map that provides a quick,accurate,and non-destructive detection method.

Characterization of Caspase Gene Family Members in Spotted Sea Bass(Lateolabrax maculatus)and Their Expression Profiles in Response to Vibrio harveyi Infection

The caspase gene family is a crucial gene cluster that regulates apoptosis which contribute to programmed cell death,cell proliferation and differentiation,and several immune responses.In our study,a complete set of 12 caspase genes were identified in spotted sea bass Lateolabrax maculatus.These genes were divided into three subfamilies:2 inflammatory caspases(casp-1 and casp-14-like),5 apoptosis initiators(casp-2,casp-8a,casp-8b,casp-9,and casp-10),and 5 apoptosis executioners(casp-3a,casp-3b,casp-3-like,casp-6,and casp-7).Their phylogenetic relationships,synteny and gene structures were systematically analyzed.Furthermore,the relative expression profiles of the caspase family members in the liver,intestine,head kidney,and spleen were measured by q PCR after infection with Vibrio harveyi.The results showed that the overall mRNA levels of the caspase genes were dramatically increased after V.harveyi infection,and the expression patterns varied among genes and tissues.More caspase genes underwent pronounced expression changes in the head kidney and spleen than in the liver or intestine,mainly after 48 h of the challenge.Specifically,casp-3a,casp-3b,casp-3-like,casp-6,casp-7,casp-8a,casp-8b,casp-10,and casp-14-like in the head kidney,and casp-3-like,casp-6,casp-7,and casp-14-like in the spleen,were the most responsive caspase genes which may contribute significantly to immune regulation in spotted sea bass.Additionally,the apoptosis level in head kidney and spleen after infection were examined using the Caspase assay.Our study provides a systemic overview of the caspase gene family in spotted sea bass after V.harveyi infection and lays a foundation for further deciphering the biological roles of these caspase genes.

Potential of Thai Bast Fibers for Injection Molded PLA Composites

Thailand has a huge variability of bast fiber plants,some of which have been little researched regarding their applicability in composites.Bast fiber(bundle)s from different species were investigated and incorporated into a polylactide(PLA)matrix by injection molding.Hemp and kenaf were used as well-studied fibers,while roselle,Fryxell and paper mulberry are less extensively characterized.Tensile strength,tensile modulus and interfacial shear strength(IFSS)of single fiber(bundle)s were highest for hemp,followed by kenaf,roselle,Fryxell and paper mulberry.Despite the lower tensile strength and IFSS of paper mulberry,the highest tensile strength was achieved for the paper mulberry/PLA composite followed by hemp/PLA.Scanning electron microscope(SEM)analyses showed that the single cells in paper mulberry fiber bundles,in contrast to the other fiber types investigated,were only partially bonded to each other,which explains the lower strength of the fiber bundles.The higher aspect ratio of fiber(bundle)s of paper mulberry in the PLA composite can explain the good composite characteristics.Apart from hemp,paper mulberry shows the best reinforcing effect in the PLA matrix and offers interesting potential for composite applications.Compared to neat PLA,the tensile strength could be increased by 24%and the tensile modulus by 54%.

Possibility of avoiding legumes-deriving boost of N 2 O emissions in tropical monoculture tree plantations

Recent reports warned that planting leguminous trees under monocultures elevates nitrous oxide(N2O)emissions through N-rich litter inputs.We hypothesized that planting trees on sandy soil can avoid the legume-derived boost of N2O emissions through limiting water availability for N2O production.Effects of planting legumes on methane(CH4)uptakes were also examined.N2O emissions and CH4uptakes were compared among five tropical tree plantation stands including three leguminous stands(Acacia auriculiformis,Acacia mangium,and Xylia xylocarpa)and two non-leguminous stands(Eucalyptus camaldulensis,and Hope a odorata).Due to lower water contents of the soil,the N2O fluxes in our study site were at the lower end of the tropical rain forests.As we hypothesized,no clear differences in N2O emissions were obs erved between leguminous and non-leguminous stands.CH4uptake rates in the present study were lower than those of other tropical forests.CH4uptakes in leguminous stands did not differ from those in non-leguminous stands.Overall,we demonstrated that planting leguminous trees on sandy soils has a potential to enable us to manage leguminous monoculture tree plantations without boosting N2O emissions or reducing CH4uptakes.

Artificial Magnetic Conductor as Planar Antenna for 5G Evolution

A 5G wireless system requests a high-performance compact antenna device.This research work aims to report the characterization and verification of the artificial magnetic conductor(AMC)metamaterial for a high-gain planar antenna.The configuration is formed by a double-side structure on an intrinsic dielectric slab.The 2-D periodic pattern as an impedance surface is mounted on the top surface,whereas at the bottom surface the ground plane with an inductive narrow aperture source is embedded.The characteristic of the resonant transmission is illustrated based on the electromagnetic virtual object of the AMC resonant structure to reveal the unique property of a magnetic material response.The characteristics of the AMC metamaterial and the planar antenna synthesis are investigated and verified by experiment using a low-cost FR4 dielectric material.The directional antenna gain is obviously enhanced by guiding a primary field radiation.The loss effect in a dielectric slab is essentially studied having an influence on antenna radiation.The verification shows a peak of the antenna gain around 9.7 dB at broadside which is improved by 6.2 dB in comparison with the primary aperture antenna without the AMC structure.The thin antenna profile ofλ/37.5 is achieved at 10GHz for 5Gevolution.The emission property in an AMCstructure herein contributes to the development of a lowprofile and high-gain planar antenna for a compact wireless component.

不同国家辐射诱变大豆品种在泰国种植主要农艺性状及产量分析

以来自5个国家的9个辐射诱变的大豆品种为试验材料，研究不同纬度来源的大豆品种在泰国的表现。结果表明：所有参试品种的生育期在82-96d，产量为O．51-2．34t／hm^2，其中以来自泰国的Sukhothai产量为最高，来自中国的HCl8M产量为最低。构成产量的主要农艺性状的相关系数由高到低分别为每株荚数、每荚粒数、百粒重，这说明在热带地区每株荚数对产量因素的贡献为最大．每英粒数为其次．而百粒重等对产量的贡献最小。

重组苏芸金杆菌杀虫晶胞蛋白的高效表达

重组质粒 ｐＳＣ６６ｄ（Ｃｒｙ ＩＡｂ６０１）转化大肠杆菌 ＤＨ５ａ后，接种 ＴＣＢ培养 基，经 ＳＤＳ－ＰＡＧＥ电泳和电镜分析，晶胞蛋白基因在大肠杆菌细胞中得到高效表 达，表达产物分子量约１３０ＫＤ，在细菌细胞中形成卵圆形包涵体。比较了重组菌 株在不同培养基中的生长及晶胞蛋白的表达水平，结果说明重组菌株在ＬＢ及２× ＹＴ培养基中的生长及表达均较低，在ＴＣＢ培养基中细菌生长良好，晶胞蛋白高 效表达，表达量可达细菌总蛋白的６３．４％，较出发菌株ＧＨ９６０１增加１７．８倍。测 定了纯化的晶胞蛋白对４种鳞翅目昆虫的杀虫活性。

泰国树薯淀粉葡萄糖浆品质和提取方法的研究

通过新设置的水解条件及使用不同用量的酶、不同浓度的淀粉,进行了树薯淀粉水解葡萄糖浆的品质和提取方法的研究。证明树薯淀粉葡萄糖浆品质良好,并提出了不同于工业上采用的、更为简便的树薯淀粉葡萄糖的提取方法。

光量子随机数发生器

设计制作了基于单光子量子随机性的二进制随机数发生器,通过50/50光分束器的光子流被其后的单光子探测器记录下光子路径,经高速电路和计算机数据采集系统转换为二进制随机数流,目前实验中随机数采集速率达100Kbit/s,本文采用延迟符合计数法来克服探测器暗计数的影响。使暗计数对随机数序列的影响下降了2到3个数量级,最后应用的三种随机性测试表明所采数据随机性良好。

Effect of seed priming with different concentrations of potassium nitrate on the pattern of seed imbibition and germination of rice(Oryza sativa L.)

Low germination and vigor of rice seed associated with dry-seed broadcasting are common problems encountered by rice growers.The objectives of this study were to evaluate the role of potassium nitrate(KNO_3)on the pattern of seed imbibition and to determine the effect of seed priming with KNO_3 on the germination percentage,speed and uniformity of germination in rice seed.Experiment 1 compared the patterns of seed imbibition of six concentrations of KNO_3(0,0.25,0.50,1.00,1.50,and 2.00%)in two rice cultivars-KDML105 and RD15.The results showed that soaking rice seed in KNO_3 at higher concentrations could delay the imbibition time.The higher concentrations of KNO_3 delayed the imbibition time of rice seed and took a longer time to reach the end of phases 1 and 2 compared to the lower concentrations.The patterns of seed imbibition using distilled water of both rice cultivars(KDML105 and RD15)were quite similar,but with different concentrations of KNO_3,the imbibition time taken to reach the end of phases 1 and 2 was slightly postponed in KDML105 suggesting that different rice cultivars may need different imbibition times for soaking seed in the priming process.Experiment 2 evaluated the effects of seed priming with 1.0 and 2.0%KNO_3 at different imbibition times.It was found that priming with 1.0%KNO_3 showed better seed germination than priming with 2.0%KNO_3 and seed priming with 1.0%KNO_3 at the imbibition time of early phase 2(or 28 h for KDML105)improved seed germination and increased both the speed and uniformity of seed germination.The results of this study show promise for the use of priming with 1.0%KNO_3 soaked until early phase 2 of seed imbibition for improving the seed germination and vigor of rice in dry seed broadcasting.

Ontology Engineering and Knowledge Services for Agriculture Domain

This paper presents a knowledge service system for the domain of agriculture.Three key issues for providing knowledge services are how to improve the access of unstructured and scattered information for the non-specialist users,how to provide adequate information to knowledge workers and how to provide the information requiring highly focused and related information.Cyber-Brain has been designed as a platform that combines approaches based on knowledge engineering and language engineering to gather knowledge from various sources and to provide the effective knowledge service.Based on specially designed ontology for practical service scenarios,it can aggregate knowledge from Internet,digital archives,expert,and other resources for providing one-stop-shop knowledge services.The domain specific and task oriented ontology also enables advanced search and allows the system ensures that knowledge service could improve the user benefit.Users are presented with the necessary information closely related to their information need and thus of potential high interest.This paper presents several service scenarios for different end-users and reviews ontology engineering and its life cycle for supporting AOS(Agricultural Ontology Services) Vocbench which is the heart of knowledge services in agriculture domain.

Influence of root suction on tensile strength of Chrysopogon zizanioides roots and its implication on bioslope stabilization

Root tensile strength is an important factor controlling the performance of bio-slope stabilization works. Due to evapotranspiration and climate factors, the root moisture content and its suction can vary seasonally in practice and may not equal soil suction. The influences of suction and root moisture contents were investigated on Chrysopogon zizanioides(vetiver grass) root tensile strength. The root specimens were equilibrated with moist air in different suction conditions(0, 10, 20, and 50 kPa), prior to root tension tests. The root-water characteristic curve or relationship between root moisture and suction, was determined. The increase in suction resulted in decreased tensile strengths of the grass roots, particularly those with diameter of about 0.2 mm, which constituted 50.7% of all roots. For 1 mm roots, the tensile strength appeared to be unaffected by suction increase. The average root tensile strengths were used to estimate the root cohesion in slope stability analysis to find variation of safety factors of a bioengineered slope in different suction conditions. The analysis showed that the critical condition of slope with the lowest factor of safety would happen when the soil suction was zero and the root suction was high. Such condition may occur during a heavy rain period after a prolonged drought.

Effects of binder strength and aggregate size on the compressive strength and void ratio of porous concrete

To test the influence of binder strength, porous concretes with 4 binder strengths between 30.0-135.0 MPa and 5 void ratios between 15%-35% were tested. The results indicated that for the same aggregate, the rates of strength reduction due to the increases in void ratio were the same for binders with different strengths. To study the influence of aggregate size, 3 single size aggregates with nominal sizes of 5.0, 13.0 and 20.0 mm (Nos. 7, 6 and 5 according to JIS A 5001) were used to make porous concrete. The strengths of porous concrete are found to be dependent on aggregate size. The rate of strength reduction of porous concrete with small aggregate size is found to be higher than that with larger aggregate size. At the same void ratio, the strength of porous concrete with large aggregate is larger than that with small aggregate. The general equations for porous concrete are related to compressive strength and void ratio for different binder strengths and aggregate sizes.

Increased ATG5-ATG12 in hepatitis B virus-associated hepatocellular carcinoma and their role in apoptosis

AIM To investigate autophagy-related genes, particularly ATG12, in apoptosis and cell cycle in hepatitis B virus(HBV)-associated hepatocellular carcinoma(HCC) and non-HBV-HCC cell lines.METHODS The expression of autophagy-related genes in HBVassociated hepatocellular carcinoma and non-HBV-HCC cell lines and human liver tissues was examined by quantitative real-time reverse transcriptase-polymerase chain reaction(q RT-PCR) and western blotting. The silencing of target genes was used to examine the function of various genes in apoptosis and cell cycle progression. RESULTS The expression of autophagy related genes ATG5, ATG12, ATG9 A and ATG4 B expression was analyzed in Hep G2.2.15 cells and compared with Hep G2 and THLE cells. We found that ATG5 and ATG12 m RNA expression was significantly increased in Hep G2.2.15 cells compared to HepG 2 cells(P < 0.005). Moreover, ATG5-ATG12 protein levels were increased in tumor liver tissues compared to adjacent non-tumor tissues mainly from HCC patients with HBV infection. We also analyzed the function of ATG12 in cell apoptosis and cell cycle progression. The percentage of apoptotic cells increased by 11.4% in ATG12-silenced Hep G2.2.15 cells(P < 0.005) but did not change in ATG12-silenced HepG 2 cells under starvation with Earle's balanced salt solution. However, the combination blockade of Notch signaling and ATG12 decreased the apoptotic rate of HepG 2.2.15 cells from 55.6% to 50.4%(P < 0.05). CONCLUSION ATG12 is important for HBV-associated apoptosis and a potential drug target for HBV-HCC. Combination inhibition of ATG12/Notch signaling had no additional effect on HepG 2.2.15 apoptosis.

泰国玉米生产和遗传改良研究

玉米是泰国一种重要的谷类作物。2000年种植面积估计为1 30百万公顷 ,籽粒产量约4 48百万吨。杂交种种植面积占到玉米总面积的85 08 % ,以单交种类型为主 ,占到杂交种各种类型的74 % ,其次为三交种。玉米生产主要限制因素为病害(高粱霜霉、南方锈、茎腐、大斑、小斑病)、虫害(亚洲玉米螟)和干旱胁迫。玉米种质发展和品种遗传改良开始于1950年 ,主要从事单位为农业部农业厅和大学部肯色萨大学。先后育成Suwan1、Suwan2、Suwan3,NakhonSawan1 ,Suwan5等改良群体和SuwanComplex、KS23broadbasesyn.。并从中提取出Ki21、45、Ni1等几十个优良系 ,组配出Suwan2301、3851、NakhonSawan72等十多个优良杂交种。分别应用10个群体双列杂交法、顶交法和优良适应品种与外引种质杂交法等 ,确定了如下几个杂种优势模式 :(Suwan1,Suwan3)×(CaripenoDMR,KS6);(Suwan1,Suwan3,KS6选育系)×(Ki21,Mo17衍生系) ;[KS23(S)C2,Suwan5(S)C3]×[Suwan1(S)C11]。

QTL Mapping for Partial Resistance to Southern Corn Rust Using RILs of Tropical Sweet Corn

Southern corn rust is one of destructive diseases in maize caused by Puccinia polysora Undrew. A mapping population of tropical sweet corn recombinant inbred lines (RILs) derived from a cross between hA9104 and hA9035 inbred lines were set up to detect quantitative trait loci (QTLs) involved in partial resistance to southern corn rust. Eighty nine RILs were used to evaluate resistance levels using nine-point relative scale (1-9) at Sweet Seeds, Suwan Farm, Thailand include combined analysis. A genetic linkage map was constructed with 157 SSR markers, with a total length of 2123.1 cM, covering 10 chromosomes. Broad-sense heritability of individual location ranged from 0.76 and 0.82 and combined across locations was 0.87. Multiple QTL mapping (MQM) was applied for the identification of the QTLs. Fifteen QTLs were detected on chromosome 1, 2, 5, 6, 9 and 10 in both locations and combined across locations. QTLs on chromosome 1, 5 and 6 were contributed by alleles of resistant parent hA9104 while others were contributed by alleles from the susceptible parent, hA9035. Phenotypic variance of each QTL explained ranged from 6.1% to 41.8% with a total of 69.8% - 81.9%. QTL on chromosome 1, 6 and 10 were stable QTLs detected in both locations.

Effects of Heat Stress at Vegetative and Reproductive Stages on Spikelet Fertility

Seed-setting rate, yield components and grain quality traits of 169 accessions from an exotic rice germplasm were tested under high temperatures from 40 oC to 45 oC for 6 h during the daytime at the vegetative and reproductive stages, respectively. The results showed that heat stress significantly decreased the seed-setting rate of all the accessions, but the heat stress effects varied among accessions. Based on the decreases in seed-setting rate at high temperatures, N22 was the most tolerant, followed by AUS17, M9962, SONALEE and AUS16. Moreover, the reductions in seed-setting rate and yield under heat stress were more serious at the vegetative stage(45 d before heading) than at the booting stage(15 d before heading). In addition, heat stress also affected grain quality, especially by conferring chalkiness to most of the accessions, but SONALEE did not change much. The heat-tolerant accessions identified here and the phenotype protocols developed could be used in future genetic studies and breeding programmes focused on heat tolerance.

Effects of Potassium and Manganese Promoters on Nitrogen-Doped Carbon Nanotube-Supported Iron Catalysts for CO_2 Hydrogenation

氮掺杂碳纳米管(NCNTs)作为载体负载铁(Fe)纳米颗粒,可应用于CO_2多相催化加氢反应(633 K和25 bar)。当将钾(K)和锰(Mn)作为助催化剂时,Fe/NCNT展现出优异的CO_2加氢性能,在体积空速(GHSV)为3.1 L·g^(–1)·h^(–1)时转化率可达34.9%。当使用K作为助催化剂时,反应对烯烃和短链烷烃具有高的选择性。当K和Mn同时作为助催化剂时,其催化活性能够稳定地维持60 h。助催化剂Mn的结构效应通过X射线衍射、氢气程序升温还原以及近边X射线吸收精细结构进行表征。助催化剂Mn不仅能够稳定中间态FeO,且能降低程序升温还原的起始温度。通过探针反应NH3的催化分解来表征助催化剂效应。当K和Mn作为助催化剂时,Fe/NCNT具有最好的催化活性。在还原条件下,当K作为助催化剂时,Fe/NCNT具有最优异的热稳定性。

Screening for Spikelet Fertility and Validation of Heat Tolerance in a Large Rice Mutant Population

A total of 10 000 M4 individuals in Jao Hom Nil (JHN) mutant population was treated with high temperature (40 ℃ to 45 ℃) during the day time (6 h) from the booting to the harvesting stages, and ambient temperature (33 ℃ to 35℃) was used as the control. The results of screening and yield trials found that the mutant line M9962 had a high spikelet fertility of 78% under heat stress. In addition, the other mutant lines, including M3181 and M7988, had a spikelet fertility of approximately 70%. However, the JHN wild type, Sin Lek, RD15 and RD33 had very low spikelet fertility of 34%, 14%, 9% and 4%, respectively. The lower spikelet fertility at an elevated temperature resulted in a dramatic decrease of filled grain and contributed to a loss in 100-grain weight. M9962 is a potential genetic stock for use in a heat tolerance breeding programme. In addition, spikelet fertility at high temperature was representative of heat tolerance and can be used as a screening trait for heat tolerance during the reproductive phase on a large scale.