Asia-Pacific Journal of Science and Technology最新文献_第9页

Observation of Fe(III) configurations of cytochrome c confined in mesoporous materials 介孔材料中细胞色素c的Fe(III)构型的观察

Asia-Pacific Journal of Science and Technology Pub Date : 2015-09-30 DOI: 10.14456/KKURJ.2015.26

Sopraya Pornsuwan

引用次数: 0

Methane fluxes and rice yields as a function of sulfate fertilizer with incorporated rice stubble 留茬硫酸盐肥对甲烷通量和水稻产量的影响

Asia-Pacific Journal of Science and Technology Pub Date : 2015-09-30 DOI: 10.14456/KKURJ.2015.28

et.al Patcharee Saenjan

引用次数: 3

Soil organic carbon stock in restored and natural forests in northern Thailand 泰国北部恢复森林和天然林土壤有机碳储量

Asia-Pacific Journal of Science and Technology Pub Date : 2015-09-30 DOI: 10.14456/KKURJ.2015.24

et.al Nuttira Kavinchan

{"title":"Soil organic carbon stock in restored and natural forests in northern Thailand","authors":"et.al Nuttira Kavinchan","doi":"10.14456/KKURJ.2015.24","DOIUrl":"https://doi.org/10.14456/KKURJ.2015.24","url":null,"abstract":"In order to increase understanding of the role that tropical forest restoration might play in mitigating global climate change, soil organic carbon (SOC) was determined in a chrono-sequence of plots in northern Thailand; from a site undergoing unassisted natural forest regeneration (control); through 3 sites undergoing forest restoration by the framework species method, aged 2, 7 and 11 years since tree planting (R2, R7, R11); to a nearby area of relatively intact forest (NF). Forest restoration greatly increased SOC stocks compared with pre-restoration data, predicting a return to NF levels in less than 21.5 years after commencement of restoration activities. However, SOC stocks, measured in soil pits dug down to 2 m depth, did not increase in sequence with forest development, as expected: control 205.8 tCha-1; R2, 254.4; R7, 251.1; R11, 161.8 and NF, 244.9. The incongruously low SOC in the 11 year-old restoration plot might be explained by the persistent, overriding, effects of land use history reducing SOC in the lower soil layers. Per cent organic carbon declined with soil depth, following reliable power functions (R2 0.92-0.97): %SOC=k.DEPTHp (k=7.7 to 22.2; p=-0.41 to -0.80). Comparison with other studies showed that forest restoration by the framework species method sequestered more soil carbon than monoculture plantations in the same region.","PeriodicalId":8597,"journal":{"name":"Asia-Pacific Journal of Science and Technology","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2015-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"66675632","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 8

The Use of Mangosteen Pericarp (Garcinia mangostana L.) Extract to Fortify the Green Tea Drink Enchanced Antioxidant Activity. 山竹果皮的应用研究增强绿茶饮料抗氧化活性的提取物。

Asia-Pacific Journal of Science and Technology Pub Date : 2015-09-30 DOI: 10.14456/KKURJ.2015.25

et.al Rufnia A. Afifah

{"title":"The Use of Mangosteen Pericarp (Garcinia mangostana L.) Extract to Fortify the Green Tea Drink Enchanced Antioxidant Activity.","authors":"et.al Rufnia A. Afifah","doi":"10.14456/KKURJ.2015.25","DOIUrl":"https://doi.org/10.14456/KKURJ.2015.25","url":null,"abstract":"Mangosteen pericarp and tea contain high polyphenol content that has disease preventive properties. This study aimed to utilize mangosteen pericarp for producing added-value product, to evaluate polyphenols stability in green tea drink with mangosteen pericarp extract, and to evaluate the effect of citric acid to the polyphenols stability in green tea drink with mangosteen pericarp extract. Mangosteen pericarp was hot air dried at 50oC until the moisture content reached 7.43±0.10%. Dried mangosteen pericarp was soaked in distilled water, then the total polyphenol content, DPPH, and FRAP of the extracted solution were analyzed. The extract was added into green tea drink at seven different concentrations (0.1-0.7%). The optimum concentration into green tea was evaluated by sensory test, and then it was mixed with gradual concentrations of citric acid (0.06, 0.1, and 0.2%). The results showed that the total phenolic compound, DPPH and FRAP of the extract were 127.39±1.19 mg GAE/ml sample, 44.92±0.68 mmol TE/ml sample, and 21.49±0.13 mM asorbic acid/ml sample, respectively. The optimum concentration evaluated by sensory test was 0.4%. The mixture of green tea drink with 0.4% mangsteen pericarp extract and 0.2% citric acid showed the lowest pH (2.79), the highest total phenolic compound (25.48±0.38 mg GAE/ml sample), DPPH (57.86±1.25 mmol TE/100 ml sample), and FRAP (5.68±0.33 mM asorbic acid/ml sample) compared with the other treatments (p<0.05). Therefore, mangosteen pericarp extract can be applied in green tea drink and provided more polyphenol content for the product. In addition, citric acid enhanced the stability of polyphenol in green tea drink.","PeriodicalId":8597,"journal":{"name":"Asia-Pacific Journal of Science and Technology","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2015-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"66675664","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 2

Impact of Integrated Organic Farming Practice on Health of People in Ubolratana District, Khon Kaen Province 孔敬省Ubolratana地区综合有机农业实践对人们健康的影响

Asia-Pacific Journal of Science and Technology Pub Date : 2015-09-30 DOI: 10.14456/KKURJ.2015.30

et.al Nomjit Nualnetr

{"title":"Impact of Integrated Organic Farming Practice on Health of People in Ubolratana District, Khon Kaen Province","authors":"et.al Nomjit Nualnetr","doi":"10.14456/KKURJ.2015.30","DOIUrl":"https://doi.org/10.14456/KKURJ.2015.30","url":null,"abstract":"Objectives: To explore the physical health, psychosocial health (time for the family, interaction with the community and generosity among the community), family finance (savings, household debt and expenditure on food), agricultural land and happiness of Ubolratana community-dwellers. Methods: Participants were 2,500 residents of Ubolratana District, Khon Kaen Province, who participated in a 3-day integrated organic farming training course during 2007-2009. By using an interview form, the participants were asked to compare their psychosocial health, family finance and the quality of their agricultural land at the study time with those at the pre-training period. Furthermore, they were interviewed about their perception of physical health condition within the past year. Their level of happiness was evaluated by using a numeric rating scale (1-10). Descriptive statistics, Chi-square test and T-test were applied for data analysis. Results: Of the 2,500 participants, 1,695 (67.8%) were practicing integrated organic farming (IF group). The rest of them (non-IF group) did not currently practice because of the lack of their own land, sources of water or time. The number of IF participants who perceived themselves as having good physical health within the past year was significantly greater than that of the non-IF participants (79.6% vs. 70.4%, p<0.001). Positive findings in psychosocial health, family finance and quality of agricultural land were also significantly greater in the IF group than in the non-IF group. The self-reported level of happiness was higher in the IF group than in the non-IF group (7.51.9 vs. 5.31.0, p<0.001). Conclusion: Community-dwellers could benefit from integrated organic farming practice in aspects of their physical and psychosocial health as well as family finance, thereby increasing personal happiness.","PeriodicalId":8597,"journal":{"name":"Asia-Pacific Journal of Science and Technology","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2015-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"66675766","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

High cell density cultivation for docosahexanoic acid production of Schizochytrium sp. BCC 25505 Schizochytrium sp. BCC 25505高产二十二碳己酸的高密度培养

Asia-Pacific Journal of Science and Technology Pub Date : 2015-06-01 DOI: 10.14456/KKURJ.2015.11

W. Prathumpai, Nuntida Sahach-atiraklap, K. Kocharin

{"title":"High cell density cultivation for docosahexanoic acid production of Schizochytrium sp. BCC 25505","authors":"W. Prathumpai, Nuntida Sahach-atiraklap, K. Kocharin","doi":"10.14456/KKURJ.2015.11","DOIUrl":"https://doi.org/10.14456/KKURJ.2015.11","url":null,"abstract":"Docosahexanoic acid (22:6 n-3; DHA) is a polyunsaturated fatty acid that is essential for functional development and maintenance of human brain and is also involved in the prevention of cardiovascular diseases, improving neural and retinal development in infants. Schizochytriumsp. BCC 25505, a marine protist, can produce DHA at high yield.In this study, biomass and DHA production of this marine protist were carried out to avoid glucose repression and nitrogen limitation using high cell density cultivation technique. The use of high glucose concentration resulted in a slow growth rate and low biomass concentration. By employing central composite design and by pulsing 40 gL-1 glucose at a time yielded maximum biomass (77.3g.L-1) and DHA (18.5 gL-1) productions.Theoptimal conditions for maximizing DHA production of Schizochytrium sp. BCC 25505 calculated using Design expert software were validated in a 5L bioreactor cultivation, yielding at 97 h a maximum concentration of biomass and docosahexanoic acid of 70.8 and 14.1gL-1 respectively. This was further scaled up in 300 L bioreactor and 115.9 gL-1 biomass, 15.0 gL-1 DHA at 119 h were obtained. This optimal fermentation process can provide a low cost production of DHA, which can be used in industrial scale.","PeriodicalId":8597,"journal":{"name":"Asia-Pacific Journal of Science and Technology","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2015-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"66675382","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Improvement of Eri Silkworm (Samia ricini D.) Tolerant to High Temperature and Low Humidity Conditions by Continuously Regime 家蚕改良研究耐高温和低湿条件下的连续状态

Asia-Pacific Journal of Science and Technology Pub Date : 2015-06-01 DOI: 10.14456/KKURJ.2015.15

Duanpen Wongsorn, S. Sirimungkararat, W. Saksirirat

{"title":"Improvement of Eri Silkworm (Samia ricini D.) Tolerant to High Temperature and Low Humidity Conditions by Continuously Regime","authors":"Duanpen Wongsorn, S. Sirimungkararat, W. Saksirirat","doi":"10.14456/KKURJ.2015.15","DOIUrl":"https://doi.org/10.14456/KKURJ.2015.15","url":null,"abstract":"Improvement of eri silkworm tolerant to high temperature condition was carried out by selection and continuous rearing (1 – 12 generation) under high temperature (42±1 °C) and low relative humidity (50±5%R.H.). The eri silkworm rearing at a normal temperature (25±2 °C; 80±5%R.H.) served as control treatment. The result revealed that eri silkworm was continuously tolerant to high temperature of 42±1˚C with low relative humidity (50±5%R.H.) up to 12 generations. Among treated generations with high temperature, the silkworm survived from larva stage (1st – 5th instar) to adult in all generations ranking 16.67 – 54.17%. Between F12 and F1, survival rate of larva – adult stage of F12 was 43.33% less than F1 (54.17%), but not significantly different (P<0.05). For cocoon yields, fresh cocoon weight, pupa weight and cocoon shell weight of F12 were lower than F1. Shell ratio of F12 (11.84%), total cocoon shell weight (5.72g) and fresh cocoon/10,000 larvae (9.39 kg) were not significantly different to F1(11.61 %, 5.72 g and 10.55 kg, respectively). It was clearly, if the egg yields were considered, egg laying/moth, hatchability, total egg laying and total hatchability increased from F1 to F12. The result indicates that the thermotolerant property of eri silkworm SaKKU1 is heritable by high temperature up to F12. This study is a first report on continuously heat tolerant improvement of eri silkworm in Thailand and elsewhere.","PeriodicalId":8597,"journal":{"name":"Asia-Pacific Journal of Science and Technology","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2015-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"66675506","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 5

A Very Simple Algorithm of Sequential IQ Imbalance and Carrier Frequency Offset Compensation in Coherent Optical OFDM 相干光OFDM中一种非常简单的序贯IQ失衡和载波频偏补偿算法

Asia-Pacific Journal of Science and Technology Pub Date : 2015-06-01 DOI: 10.14456/KKURJ.2015.14

Kidsanapong Puntsr

{"title":"A Very Simple Algorithm of Sequential IQ Imbalance and Carrier Frequency Offset Compensation in Coherent Optical OFDM","authors":"Kidsanapong Puntsr","doi":"10.14456/KKURJ.2015.14","DOIUrl":"https://doi.org/10.14456/KKURJ.2015.14","url":null,"abstract":"In this work, a hardware efficient algorithm for sequential in-phase (I) and quadrature (Q) imbalance (IQ imbalance) and carrier frequency offset (CFO) compensation under chromatic dispersion (CD) and phase noise (PN) environment is proposed. Two identical orthogonal frequency division multiplexing (OFDM) symbols, which are namely training sequences (TSs), are used to acquire CFO and IQ imbalance coefficients. The CFO is obtained by calculating phase differences between the two TSs. To achieve the image frequency interference factors which are caused by an IQ imbalance effect, each symbol of the TS is modulated on only a half of all the subcarriers while the remaining subcarriers are modulated with zeros. By doing this, the IQ imbalance coefficients are directly estimated without recursive calculation requirements. This brings a low complexity to implementation in hardware. The performances of the modeling system are evaluated by a numerical simulation method where the error vector magnitude (EVM), the bit error ratio (BER), and the mean square error (MSE) quantities are used as performance indicators. The numerical simulation results are showed that the performance of the modeling system is enormously improved even when highly dispersive channels and phase noise are considered.","PeriodicalId":8597,"journal":{"name":"Asia-Pacific Journal of Science and Technology","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2015-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"66675454","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 4

3D Photochemical Dispersion Models for Secondary Air Pollutant Study: from Input Data Preparation to Model Performance Evaluation 二次空气污染物研究的三维光化学扩散模型:从输入数据准备到模型性能评估

Asia-Pacific Journal of Science and Technology Pub Date : 2015-06-01 DOI: 10.14456/KKURJ.2015.17

et.al Thongchai Kanabkaew

{"title":"3D Photochemical Dispersion Models for Secondary Air Pollutant Study: from Input Data Preparation to Model Performance Evaluation","authors":"et.al Thongchai Kanabkaew","doi":"10.14456/KKURJ.2015.17","DOIUrl":"https://doi.org/10.14456/KKURJ.2015.17","url":null,"abstract":"Secondary air pollutants are formed through series of complex reactions occurred in the atmosphere under favorable meteorological conditions. Commonly known species are ozone and secondary aerosols, secondary inorganic and organic aerosols. Through its complexity, varieties of three dimensional (3D) photochemical dispersion models have been developed globally to simulate formations and dispersions of the secondary as well as the primary pollutants in the atmosphere. CMAQ and CAMx are the state of the science models under “one atmospheric approach”, noncommercial and open-source software. These characteristics are attracted and challenged for future air quality management via model simulations. Applications of CMAQ and CAMx are normally based on several steps: preparation of emission input, modeling set-up and model performance evaluation. This article presents the systematic procedures involved with the use of 3D photochemical models starting from theoretical principles for formation of secondary air pollutants, types of photochemical models and its associated physical and chemical modules, input data preparation including reviews on available emission inventories and lastly statistical methods for model performance evaluation.","PeriodicalId":8597,"journal":{"name":"Asia-Pacific Journal of Science and Technology","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2015-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"66675961","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Effect of Temperatures on Growth, Yields and Heat Shock Protein Expression of Eri Silkworm (Samia ricini D.) 温度对家蚕生长、产量及热休克蛋白表达的影响

Asia-Pacific Journal of Science and Technology Pub Date : 2015-06-01 DOI: 10.14456/KKURJ.2015.16

et.al Duanpen Wongsorn

{"title":"Effect of Temperatures on Growth, Yields and Heat Shock Protein Expression of Eri Silkworm (Samia ricini D.)","authors":"et.al Duanpen Wongsorn","doi":"10.14456/KKURJ.2015.16","DOIUrl":"https://doi.org/10.14456/KKURJ.2015.16","url":null,"abstract":"The effect of high temperatures on the growth, yields and heat shock protein (HSP) production of eri silkworm (Samia ricini D.) was carried out by exposure the 5th instar day 3 larvae to different temperatures, 36±1, 40±1, 42±1, 45±1 and 48±1°C for 3 hours, compared to control treatment by rearing eri silkworm continuously at normal temperature (25±2°C, 80±5%R.H.). After treated with high temperature condition, the eri silkworm larvae were reared at 25±2°C, 80±5%R.H.until cocooning, pupation, adult stage, coupling and laying eggs. The result exhibited that survival rates, cocooning rate and almost yields varied inversely to temperatures especially between 42±1 – 48±1°C. At the highest temperature, survivals and yields were the lowest, while those values were the maximum nearly all control treatments. At 48±1°C treatment, the means of all parameters were the lowest; larva survival (50.00%), survival of larva – adult (38.33%) and cocooning rate (41.67%), which were significantly different to other treatments(P<0.05). Other yields affected by 48±1°C were also the lowest; fresh cocoon weight(2.5078 g), pupa weight (2.1508 g), shell weight (0.3429 g), total cocoon shell weight(2.88 g), fresh cocoon weight/10,000 larvae (10.47 kg), egg laying/moth (287.56 eggs), hatchability (72.67%), total egg laying (1,121.33 eggs) and total hatchability (800.11 eggs). Detection of HSP of 5th instar larvae day 3 of eri silkworm treated with 5 different temperatures (36±1, 40±1, 42±1, 45±1 and 48±1 °C) was performed using sodium dodecyl sulfate polyacrylamide gel electrophoresis (SDS–PAGE), compared to control treatment (25±2°C; 80±5%R.H.). The result was clearly that the eri silkworm treated with all high temperatures expressed HSP bands of approximate 50 kDa. Whereas HSP band was not detectable in control treatment. The HSP is applicable in the thermotolerant variety improvement program of eri silkworm.","PeriodicalId":8597,"journal":{"name":"Asia-Pacific Journal of Science and Technology","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2015-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"66675515","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1