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REFERENCE LINKING PLATFORM OF KOREA S&T JOURNALS
> Journal Vol & Issue
KOREAN JOURNAL OF CROP SCIENCE
Journal Basic Information
Journal DOI :
The Korean Society of Crop Science
Editor in Chief :
Lee, Sang Chul
Volume & Issues
Volume 53, Issue spc - Dec 2008
Volume 53, Issue 4 - Dec 2008
Volume 53, Issue 3 - Sep 2008
Volume 53, Issue 2 - Jun 2008
Volume 53, Issue 1 - Mar 2008
Selecting the target year
Changes of Milling Quality of Rice Varieties According to the Transplanting Time and Good Resources with High Milling Quality in Yeongnam Plain Paddy
Kim, Choon-Song ; Lee, Jong-Hee ; Kwak, Do-Yeon ; Jeon, Myeong-Gi ; Kang, Jong-Rae ; Yeo, Un-Sang ; Shin, Mun-Sik ; Oh, Byeong-Geun ;
KOREAN JOURNAL OF CROP SCIENCE, volume 53, issue spc, 2008, Pages 1~8
We carried out this study to analyze changes of rice grain milling properties according to the transplanting time and to identify genetic resources suitable for improving milling quality of rice in paddy field of Yeongnam area. We analyzed grain filling and milling quality of 30 rice varieties. In late transplanting (June 20), heading date was delayed for 6 days, compared to normal transplanting(June 5). The grain filling ratio (GFR), perfect kernel ratio of milled rice (PKR), and head rice recovery (HRR) were improved in late transplanting. There was no significant difference in head rice yield of two transplanting time, even though the milled rice yield in late transplanting was significantly smaller than that in normal transplanting because of the reduction of spikelet numbers per panicle. The uniformity of brown rice grain measured by selection sieve norm was improve in late transplanting. There was no significant difference of milling loss ratio between normal and late transplanting but there was a trend for a increase of milling necessary time in late transplanting. Thus, our result suggest that optimum transplanting time is June 10 to 15 to improve grain filling and milling quality and produce high head rice yield in the southern paddy plain of Yeongnam region. We selected promising 9 rice varieties which are Nampyeongbyeo, Ilmibyeo, Chucheongbyeo, Dongjinbyeo, Hopyeongbyeo, Malguemi, Chilbo, Hinohikari, and Cheongmu having high percentage of ripened grain and milling quality as genetic resources to improve milling characteristics of rice varieties. Chucheongbyeo, Dongjinbyeo, and Malguemi showed the highest grain filling ratio and Nampyeongbyeo had the highest perfect kernel ratio. Nampyeongbyeo and Ilmibyeo showed the highest head rice yield with more than 500 kg/10a.
Effects of Different Transplanting Dates and Agroclimatic Zones on Quality of Brown Rice and Yield of a Pigmented Rice Variety 'Josaengheugchal'
Lee, Yun-Sang ; Lee, Joung-Kwan ; Lee, Sang-Young ; Yun, Tae ; Woo, Sun-Hee ;
KOREAN JOURNAL OF CROP SCIENCE, volume 53, issue spc, 2008, Pages 9~14
This experiment was carried out to clarify the effect of various transplanting dates and agroclimatic zones on quality of brown rice and yield of a pigmented rice variety ‘Josaengheugchal’. The black density of brown rice in Jecheon (central inland region) showed a slight difference among the transplanting dates, but in Cheongwon (western sobaek inland region) that had increased at the transplanting dates of June 10th to 20th. cyanidin 3-glucoside (C3G) content at the same transplanting date in Jecheon was higher than Cheongwon, and the overall C3G content was increased at the later transplanting dates. The optimum transplanting date estimated by brown rice yields and C3G content was May 11th (491 kg/10a) in Jecheon and June 16th (468 kg/10a) in Cheongwon.
Influence of Viviparous Germination on Quality and Yield in Rice
Kim, Se-Jong ; Won, Jong-Gun ; Ahn, Duok-Jong ; Park, So-Deuk ; Choi, Chung-Don ;
KOREAN JOURNAL OF CROP SCIENCE, volume 53, issue spc, 2008, Pages 15~18
This study was conducted to analyze the rice yield and grain quality of viviparous germinated seeds caused by long period rainy days. In the yield characteristics, the milled/brown rice rates in two cultivars, Unkwangbyeo and Gopumbyeo were 86.0 and 80.9%, respectively, in viviparous germinated seeds, showing the decreased rates by 3.2 and 6.2%, respectively, as compared to 89.2 and 87.1% in normal seeds. Rice yield in Unkwangbyeo and Gopumbyeo also decreased by 5 and 7%, respectively, in viviparous germinated seeds as compared to normal seeds. Peak viscosity and set back of viviparous germinated seeds were decreased, and the hardness of them was increased compared to normal seeds. Color value (a) of viviparous germinated seeds was 0.90, showing lower value than that (1.65) of normal seeds of Gopumbyeo. The results demonstrated that as the viviparous germinating rate was increased, the grain quality was deteriorated.
Yield and Grain Quality as Affected by Seedling Age in Late Transplanted Rice
Won, Jong-Gun ; Ahn, Duok-Jong ; Kim, Se-Jong ; Choi, Chung-Don ; Lee, Sang-Chul ;
KOREAN JOURNAL OF CROP SCIENCE, volume 53, issue spc, 2008, Pages 19~23
This study was conducted to compare the yield and grain quality as affected by rice seedling age in late transplanted rice. The rice yield was remarkably reduced in 10 day-old seedlings but those of older seedlings over than 30-day were not different. In the rice quality, as the rice seedling age younger the rate of greened and damaged rice increased, suggesting decreasing of the head rice rate. Among the physicochemical characteristics, protein content of rice grain was increased in 10 day-old seedling but amylose content was not different, consequently, the palatability was improved in older seedlings over than 30-day. From these results, it is more beneficial to machine transplant the older seedlings over than 30-day for delayed transplanting.
Effects of Rice Bran Application on Growth, Yield, and Palatability of Rice
Kang, Mi-Young ; Kim, Joo-Hee ; Hue, Kyu-Hong ; Cho, Sun-Shik ; Esguerra, Manuel Q. ; Son, Tae-Kwon ; Lee, Sang-Chul ;
KOREAN JOURNAL OF CROP SCIENCE, volume 53, issue spc, 2008, Pages 24~30
Effect of rice bran applied alone or in combination with chemical fertilizer on growth and edible quality of rice was investigated. The experiment consisted of 11 treatments: 3 levels of rice bran (RB) (500, 250 and 100kg
), 100 and 50% recommended fertilizer (RF) combined with above-mentioned 3 levels of RB, and 100 and 50% RF only. The rice brans were applied at 10 days before rice transplanting. Results showed that plant height 30 days after transplanting was significantly higher at 100% RF treatment than the RB treatments. However, plant height during heading stage was not significantly different between the 100% RF and the RB treatments. At higher RB treatments, ripened grain decreased, while panicle number and plant height increased. In the case of rice yield, 50% RF + RBtreatments exhibited similar or slightly higher yield than 100% RF. These results suggested that the recommended fertilizer can be reduced by 50% in case of applying RB. In terms of nutritional quality, protein content on rice grain increased at higher RB treatment, while amylose content at 50% RF + RB treatments (
) decreased compared to that of RF (
). Results showed significant effects of RB application on rice growth and quality.
Effect of Silicate Application on Grain Quality and Storage Characteristics in Rice
Won, Jong-Gun ; Kim, Se-Jong ; Ahn, Duok-Jong ; Seo, Young-Jin ; Choi, Chung-Don ; Lee, Sang-Chul ;
KOREAN JOURNAL OF CROP SCIENCE, volume 53, issue spc, 2008, Pages 31~36
This study was carried out to clarify the effect of silicate application on rice grain quality and storage characteristics in Ilpumbyeo cultivar. In yield and yield components, panicles and spikelet numbers were increased and ripened grain rate was also increased by 2%. Head rice yield was increased by
in silicate application. Protein content of milled rice was reduced by
and head rice rate was increased by
in silicate application due to decrease of chalky and damaged rice rate. In milling characteristics, color separation rate was improved by
and colored rice rate was decreased by
in silicate application. Acid value of stored brown rice were increased slowly in low temperature and silicate application, but that in room temperature and no silicate application was increased remarkably. The best degree rate of stored brown rice (over than 7.5 of pH) measured by the pH of grain was increased by the silicate application in both low and room temperature. Therefore, it was suggested that the storage characteristics of rice grain was improved by the silicate application.
Pre- and Post-Germination Changes in Pharmaceutical Compounds of Germinated Brown Rice
Jung, Hey-Young ; Lee, Dong-Hyun ; Baek, Hum-Young ; Lee, Young-Sang ;
KOREAN JOURNAL OF CROP SCIENCE, volume 53, issue spc, 2008, Pages 37~43
Recent consumption of germinated brown rice is increasing due to its health-beneficial effects. To clarify germination-dependent changes in functional compound contents, 5 different types of (ordinary, glutinous, green-kerneled, red-colored and black-colored) rices were selected and their pre- and post-germination content changes in vitamin E (
), squalene, and phytosterols (campesterol, stigmasterol, sitosterol) were evaluated. In the case of vitamin E isomer contents, germination generally resulted in decreasing tendency around 10% in most isomers as well as in total tocopherol and tocotrienol contents in all types of rices. In the case of squalene, significant increase could be observed in glutinous rice (by 31%), while other types of rices exhibited no changes or slight reduction by germination. Regarding stigmasterol contents, all tested types of germinated brown rice exhibited significant increment by 19 to 27% compared to nongerminated cases, except for green colored-rice which showed statistically not significant 5% increment. No changes or slight reductions, however, could be observed in campesterol and sitosterol, as well as in total phytosterol contents. As a conclusion, most of tested pharmaceutical compounds exhibited statistically not significant changes except for stigmasterol which were increased by the germination process.
Analysis of Grain Quality of Commercial Brand Rice for the Production of High quality Rices in Gyeongbuk Province, Korea
Kim, Se-Jong ; Ahn, Duok-Jong ; Won, Jong-Gun ; Park, So-Deuk ; Choi, Chung-Don ;
KOREAN JOURNAL OF CROP SCIENCE, volume 53, issue spc, 2008, Pages 44~46
This study was carried out to observe the quality of commercial brand rices collected from Gyeongbuk Province, Korea in 2006-2007. Rice quality was analyzed as a mixed ratio with other varieties by DNA analysis, physicochemical and appearance characteristics among 26 commercial brand rices. In protein contents of rice grain, 12 brand rices were lower than 6.5%, 6 brand rices were ranged 6.6-7.0%, and others were higher than 7%. In head rice rates, 2 brand rices were higher than 95%, 4 brand rices were ranged 90-94%, and other brand rices were lower than 90%. In distribution of the mixed ratio with other varieties, 12 commercial brand rices were ranged 1- 10%, 9 commercial brand rices were ranged 11-20%, and 5 brand rices were lower than 20% of mixed ratio.
Improving Grain Quality by Controlling Top Dressing of Nitrogen Application Ratio
Won, Jong-Gun ; Ahn, Duok-Jong ; Kim, Se-Jong ; Choi, Chung-Don ; Lee, Sang-Chul ;
KOREAN JOURNAL OF CROP SCIENCE, volume 53, issue spc, 2008, Pages 47~52
This study was carried out to improve the rice grain quality of Ilpum cultivar, especially to reduce the chalky rice rate by controlling top dressing of nitrogen application ratio at the tillering and panicle initiation stage. In the rice plant growth, the number of tiller and leaf area index of maximum tillering stage were influenced by basal dressing and top dressing at tillering stage; however those of heading stage were mainly influenced by top dressing at panicle initiation stage. In yield and yield components, they were influence by the top dressing at panicle initiation stage and the rice yield was increased by percentage of the top dressing. The protein content of rice grain was increased as the rate of top dressing at panicle initiation stage was increased. The rate of chalky and damaged rice was remarkably increased as the top dressing ratio was increased, resulting in reducing the rate of head rice rate. As the results, the characteristics of milling and rice quality was improved when the amount of top dress was reduced as 50% at the panicle initiation stage, and the yield of head rice also increased.
Selection of Rice Cultivars Adaptable to Top Rice Cultivation Region in Southern Part of Korea
An, Deok-Jong ; Won, Jong-Gun ; Kim, Se-Jong ; Choi, Chung-Don ; Lee, Sang-Chul ;
KOREAN JOURNAL OF CROP SCIENCE, volume 53, issue spc, 2008, Pages 53~57
The experiment was carried out to select the rice cultivar adaptable to Top Rice cultivation region from 2006 to 2007 in Useong and Kyeongju, Korea. Four cultivars, recommended for high rice grain quality, were cultivated in the different region in this study. The average yield of head rice was higher in Samguangbyeo than the other three cultivars. The protein content was inversely associated with palatability (Toyo value). The protein content of Samguangbyeo was 6.2%, which was the lowest among the tested cultivars. L values in color of rice and cooked rice were not significantly different. The hardness of Samguangbyeo was lower than that of the other cultivars in texture properties of boiled rice on 4 cultivars. In conclusion,considering the rice yield and grain qualities, Samguangbyeo was selected as promising rice cultivar for Top Rice cultivation region.
Diallel Analysis for Cyanidin-3-glucoside Content in Pigmented Rice
Kwon, Soon-Wook ; Han, Sang-Jun ; Kim, Hong-Yeol ; Ryu, Su-Noh ;
KOREAN JOURNAL OF CROP SCIENCE, volume 53, issue spc, 2008, Pages 58~64
A complete diallel cross was performed to determine the inheritance of 1,000 grain weight of brown rice and cyanidin-3-glucoside (C3G) content and combining ability of five pigmented rice that showed different level of C3G content. Parents and F1 of 20 crosses were evaluated for 1,000 grain weight of brown rice and C3G content which extracted from pigmented rice grain with 0.1% trifluoroacteic acid (TFA) in 95% EtOH. For 1,000 grain weight of brown rice and C3G content, both additive and dominant gene effects were detected and the dominance was partial and there were more dominant alleles than recessive ones. Genetic parameters pointed out that there are significant additive and dominant effects and the additive effect is bigger than the dominant one for both grain weight and C3G content. The frequency of negative alleles were higher than positive alleles. Narrow sense heritability estimates were 0.66 for grain weight of 1,000 brown rice and 0.70 for C3G contents. General combining ability (GCA) effects and specific combining ability (SCA) effects were highly significant and GCA effects were drastically higher than SCA ones. It indicates that the inheritance of the C3G contents is controlled mainly by additive genetic factor.
Effects of Combined Application of Rice Bran and Chemical Fertilizer on the Phytochemical Contents of Rice
Kang, Mi-Young ; Kim, Joo-Hee ; Heo, Kyu-Hong ; Cho, Sun-Shik ; Esguerra, Manuel Q. ; Rico, Cyren M. ; Son, Tae-Kwon ; Lee, Sang-Chul ;
KOREAN JOURNAL OF CROP SCIENCE, volume 53, issue spc, 2008, Pages 65~71
The effect of rice bran (RB) applied alone or in combination with chemical fertilizer at different application rate on the phytochemical and antioxidant properties of rice was investigated. The treatments were 3 levels of RB namely: 200% RB (500 kg
), 100% RB (250 kg
), 50% RB (125 kg
), Recommended fertilizer dose (RF:
, 11-5.5-4.8 kg
) combined with each RB, Half-recommended fertilizer dose (HRF:
, 5.5-2.75-2.4 kg
) combined with each RB, RF and HRF applied at 1, 5, 10 days before rice transplanting (DBT). The parameters investigated were antioxidant, phytosterol and fatty acid contents. Results showed that the antioxidant property and phytosterol contents were high at 10 DBT HRF plus RB, 5 DBT RF plus RB, and 1 DBT 100 and 200% RB. However, total polyphenols increased from 10 to 1 DBT. In the case of fatty acids, no general trend was observed between treatments at different application times. Linoleic acid was high at 10 DBT HRF plus RB while linolenic acid was not affected at different application times. Palmitoeic and oleic acids were not also affected at 5 and 10 DBT. Saturated fatty acids were not also affected by any treatment at different application times except for palmitic acid.Most parameters obtained higher values at 100 and 200% RB treatments in 1 DBT.
Response of Rice Yield and Grain Quality as Affected by Rice Leaf Folder
Won, Jong-Gun ; Ahn, Duok-Jong ; Kim, Se-Jong ; Choi, Chung-Don ; Lee, Sang-Chul ;
KOREAN JOURNAL OF CROP SCIENCE, volume 53, issue spc, 2008, Pages 72~77
This study was carried out to determine the response of the rice yield and grain quality by rice leaf folder (RLF, Cnaphalocrocis medinalis G.) and identify the damages caused by different transplanting dates, nitrogen amounts and chlorophyll amounts (SPAD value) of rice leaf. As the damage degree of RLF was getting severer, the ripened grain rate and 1000-grain weight were decreased and due to the increasing of chalky rice rate the rate of head rice was reduced. Therefore, the yield of head rice was decreased by 36% in heavily damaged rice plant. Among the physicochemical characteristics, protein content of rice grain was increased but amylose content was reduced, consequently, the palatability was deteriorated in heavily damaged rice by RLF. The degree of damage of RLF was getting serious as transplanting date was delayed and as the amount of nitrogen was increased. In the relationship between the SPAD value and the damage degree of RLF, as the SPAD value was increased by nitrogen fertilizing, the damage degree was also increased exponential functionally.
Intra- and Inter-Variation of Protein Content in Soybean Cultivar Seonnogkong
Im, Moo-Hyeog ; Choung, Myoung-Gun ;
KOREAN JOURNAL OF CROP SCIENCE, volume 53, issue spc, 2008, Pages 78~83
Soybean [Glycine max (L.)] is a major source of protein for human and animal feed. Inter- and intra-genotype variation of soybean protein has been investigated by soybean researchers. However, limited sample amount of soybean single seed there is no report that investigated intra-plant variation of soybean protein within soybean plant. Recently a non-destructive NIR (near-infrared reflectance) spectroscopy using single seed grain to analyze seed protein was developed. The objectives of this study were to understand variation of seed protein content within plant and to determine the amount of minimum sample size which can represent protein content for a soybean plant. Frequency distribution of protein content within plant showed normal distribution. There was an intra-cultivar variation for protein content in soybean cultivar Seonnogkong. Difference of protein content among single plants of Seonnokong was recognized at 5% level. Seeds in lower position on plant stem tended to accumulate more protein than in higher position. There was significant difference for protein content between sample size 5 seeds and sample size of more than 5 seeds (10, 20, 30, 40, and 50 seeds) at a soybean plant with 57 seeds however no difference was recognized among sample size (5, 10, 20, and 30 seeds) at a soybean plant with 33 seeds. Around 20% seeds of soybean from single plant needed to determine the protein content to represent protein content of single soybean plant. This study is the first one to report evidence of intra-plant variation for proteincontent which detected by non-destructive NIR spectroscopy using single seed grain in soybean.
Extraction Efficiency and Stability of Anthocyanin Pigments in Black Soybean Seed Coat
Kim, Sun-Young ; Ko, Kwang-Oh ; Lee, Young-Sang ; Kim, Hee-Seon ; Kim, Yong-Ho ;
KOREAN JOURNAL OF CROP SCIENCE, volume 53, issue spc, 2008, Pages 84~88
This study was carried out to develop the methods for efficient extracting and stabilization of anthocyanin pigments in black colored soybean. The optimum solvent concentration for the highest pigment extraction from seed coat of black colored soybean was 60% MeOH with 0.1% HCl in laboratory test. The higher temperature of the solvent until
led to better extraction efficiency of anthocyanin. The anthocyanin extracts maintained almost its stability in strong acidity area whereas it destroyed markedly over pH 4. Also anthocyanin extracts was stable for a while under weak light condition, but it showed rapid degradation of pigment color and markedly decreased HPLC value for anthocyanin content after one month storage days. In case storage temperature and instrument, glass vessel on low temperature (
) was good storage condition among some treatments. And C3G was more stable than other pigments.
Growth Characteristics and Qualities of Korean Soybean Landraces
Han, Won-Young ; Park, Keum-Yong ; Choung, Myoung-Gun ; Kim, Hyun-Tae ; Ko, Jong-Min ; Baek, In-Youl ; Lee, Chung-Yeol ;
KOREAN JOURNAL OF CROP SCIENCE, volume 53, issue spc, 2008, Pages 89~95
This study was carried out to examine growth characteristics and seed qualities of 1,296 Korean soybean landraces. The range of days to flowering, and days to maturity was 38 to 83 days and 47 to 102 days, respectively. The range of growth days were 105 to 160 days, and 38% was belonged to maturity group III. The 100 seed weight was 19.5g, showing the range of 2.4 g to 40.4 g, and 19.5 g in mean. 35.3% was in the range from 13.1 g to 20.0 g, and 29.4% in the range from 20.1 g to 25.0 g. Mean contents of crude protein was 41.8%, showing the range from 32.7% to 49.2%. Mean contents of crude oil was 18.0%, showing the range from 11.8% to 22.2%. The composition of unsaturated fatty acids were from 81.8% to 94.2%, and 85.4% in mean. Sucrose contents were in the range from 1.24% to 7.91% with the mean 5.21%, and oligo-saccharide contents from 2.45% to 11.13% with the mean 8.01%. Total isoflavone contents were in the range from
with the mean
. Among isoflavone contents, daidzein, glycitein, and genistein contents were in the range from
with the mean
with the mean
, and from
with the mean
Variations in Growth Characteristics and Seed Qualities of Korean Soybean Landraces
Han, Won-Young ; Park, Keum-Yong ; Kim, Hyun-Tae ; Ko, Jong-Min ; Baek, In-Youl ; Lee, Chung-Yeol ; Choung, Myoung-Gun ;
KOREAN JOURNAL OF CROP SCIENCE, volume 53, issue spc, 2008, Pages 96~102
This study was carried out to examine agronomic characteristics and seed qualities of 827 Korean soybean landraces according to the collecting areas. Agronomic characteristics and seed qualities was examined according to the localities by weather characteristics. Days to flowering was the longest (mean 70.9 days) in the northwest seashore, and the most short in the south inland (mean 63.8 days). Growth days was the longest in the Gyeongbuk inland (mean 136.0 days), and the most short in the mountain-high (mean 132.8 days). The stem height was the most short in the north-west seashore (mean 81.3 cm), and in the south seashore (mean 58.8 cm). The seed weight of 100 seeds was the lightest in the north-west seashore (mean 17.1 g), and the heaviest in the south-west seashore (mean 21.5 g). The crude protein contents was the lowest in the north-west seashore (mean 40.1%), the highest in the south seashore (mean 42.8%), and vice versa in the crude oil. The contents of sucrose and oligo-saccharide was the highest 5.8% and 8.6%, respectively, in the mountain-high, and the lowest 4.8% and 7.6% in the Gyeongbuk inland and south seashore, respectively. Among the iso-flavone contests, the contents of genistein and total was the highest,
, respectively, in the mountain inland, and the lowest
in the south-west seashore. The contents of glycitein was the highest
in the south seashore.
Difference of Ginsenoside Contents in Roots Cultivated under Blue and Red Polyethylene Shading Net in Panax ginseng C. A. Meyer
Lee, Sung-Woo ; Kim, Geum-Soog ; Park, Chung-Heon ; Simon, James E. ; Kim, Kwan-Su ;
KOREAN JOURNAL OF CROP SCIENCE, volume 53, issue spc, 2008, Pages 103~107
This study was carried out to investigate the effect of light quality on root yield and ginsenoside contents of 4-year-old ginseng by using the fourfold polyethylene shading net with different colors, blue and red color, compared to blue-black (3:1) mixed shading net as control. Control and blue shading net occurred higher root yield, especially, in tap root growth than red one, whereas transmitted quantum in red shading net was higher than those in blue one or control. However, red shading net caused the highest content of total ginsenoside, especially, Rg1 content, as compared to blue and control. We assumed that the increased content of ginsenoside is not caused by light quality such as red, but is due to the increase of relative ratio of ginsenoside in whole root tissue arising from the reduced root growth.
Determination of Color Value (L, a, b) in Green Tea Using Near-Infrared Reflectance Spectroscopy
Lee, Min-Seuk ; Choung, Myoung-Gun ;
KOREAN JOURNAL OF CROP SCIENCE, volume 53, issue spc, 2008, Pages 108~114
Near infrared spectroscopy (NIRS) is a rapid and accurate analytical method for determining the composition of agricultural products and feeds. The applicability of near infrared reflectance spectroscopic method was tested to determine the color value (L, a, b) of green tea. A total of 162 green tea calibration samples and 82 validation samples were used for NIRS equation development and validation, respectively. In the developed NIRS equation for analysis of the color value (L, a, b), the most accurate equation for L value was obtained at 2, 8, 6, 1 (2nd derivative, 8 nm gap, 6 points smoothing, and 1pointsecond smoothing), and for a, and b value were obtained at 1, 4, 4, 1 (1st derivative, 4 nm gap, 4points smoothing, and 1 point second smoothing) math treatment condition with SNVD (Standard Normal Variate and Detrend) scatter correction method and entire spectrum (
) by using MPLS (Modified Partial Least Squares) regression. Validation results of these NIRS equations showed very low bias (L: 0.005%, a: 0.003%, b: -0.013%) and standard error of prediction (SEP, L: 0.361%, a: 0.141%, b: 0.306%) as well as high coefficient of determination (
, L: 0.905, a: 0.986, b: 0.931). Therefore, these NIRS equations can be applicable and reliable for determination of color value (L, a, b) of green tea, and NIRS method could be used as a mass screening technique for breeding programs and quality control in the green tea industry.
Absence of Tocotrienol Form of Vitamin E in Purple Perilla (Perilla frutescens var. acuta Kudo) Seeds Confirmed by Comparative Analysis Using HPLC and GC
Lee, Young-Sang ; Kim, Min-Kyoung ;
KOREAN JOURNAL OF CROP SCIENCE, volume 53, issue spc, 2008, Pages 115~120
Lipid soluble vitamin E consists of tocopherols and tocotrienols depending upon double bonds in phytyl side chains attached to chromanol ring. Recent reports on antioxidative, anticancer, and cholesterol-lowering effects of tocotrienols have increased researches and commercialization of tocotrienols. Purple perilla (Perilla frutescens var. acuta Kudo) has been reported as a plant containing tocotrienols along with tocopherol forms of vitamin E based upon normal phase HPLC analysis. To confirm the existence or absence of tocotrienol form of vitamin E in purple perilla, comparative analysis using HPLC, GC/FID, and GC/MSD has been conducted for 14 purple perilla genetic accessions collected from Korea and Japan. Normal phase HPLC analysis showed
along with peaks with retention times quite similar to
. Same purple perilla samples, analysed by GC exhibited
quantitatively equivalent to HPLC results. However, no peaks for
could be observed and unknown two peaks of similar retention times with
were identified not corresponding tocotrienols by GC/MSD. These results suggest the absence of tocotrienol form of vitamin E in purple perilla as well as the necessity of using GC-based qualitative and quantitative vitamin E analysis to avoid misinterpretation of peaks with similar retention times as tocotrienol isomers when analysed by an HPLC.
Antioxidant Activity of Methanol Extract from Aerial Parts in Lespedeza cuneata G. Don
Kim, Yong-Han ; Ryu, Su-Noh ;
KOREAN JOURNAL OF CROP SCIENCE, volume 53, issue spc, 2008, Pages 121~123
In order to verify the efficacy of Lespedeza cuneata G. Don which have been used as a folk traditional herb medicine from ancient times, the test of antioxidant activity and the analysis of constituents were carried out. Methanol extracts from L. cuneata G. Don showed a radical scavenging activity corresponding to that of (+)-catechin as positive control at 250
/mL (ca 90% inhibition), and inhibited more than 30% of DPPH radical at low concentration of 10
/mL. In the present study, as a fundamental study for the specification of antioxidant components from L. cuneata G. Don, the analysis for constituents for L. cuneata with HPLC was preformed although there was no results to identify functional flavonoids such as quercetin.