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全泰玉,周原植,金福仁,崔병국,吳世旭 東亞大學校 1980 東亞論叢 Vol.17 No.2
Austenite stainless steel 년 316 has heat treated to austenite structure by heating at 1100℃ for 1hr and suddenly cooling. These specimens has been dealed with aging treatment at 700℃ for 0hr, 2hr, 10hr, and 100hr separately, and then conducted by creep test on the uniaxial state of stress in atmosphere of 600℃. The experimental results are obtained as follows. 1) Creep rupture stain rate has increased by the increasing of aging time. 2) Creep rupture time have had large affect of aging time comparing with 0hr aging specimen and increased by 20%, 40%, and 60% separately for 2hr, 10hr, and 100hr aging specimen. The empirical formulas of creep rupture time "t" as follows. (aging time are in parenthesis) t?=2.297×10? t?=8.810×10? t?=2.951×10? t?=1.178×10? 3) Creep constant "n" has increased, "k" decreased and creep limit increased by increasing the aging time. Then creep strain rate has decreased and increased by increasing the aging time and stress. The empirical formulas as follows. ε?=3.326×10? ε?=1.905×10? ε?=1.347×10? ε?=3.465×10? 4) The creep strain rate multiplied by creep rupture time has constant value according to property of material and belongs to the range of parallel line at logarithmic graph paper. 5) Hardness has increased by the increasing of aging time and intergranular hardness is higher than transgranular hardness. 6) The micro cracks occur from wedge crack and cavitation crack at grain boundary and exist at the surface of specimen and the surface of longitudnal section. 7) High stress and aging specimens have mostly wedge crack. Low stress and nonaging specimens have mostly cavitation crack. 8) Rupture surface of higher stress has shearing fracture of about 45° inclination, and has tendency of fracture by directing perpendicular to the axis for decreasing creep stress and also has same phenomenon for occurrence and propagation of crack.
수수×수단그라스 交雜種과 大豆 間作栽培時 生育段階에 따른 刈取回數 및 生育特性, 乾物收量 粗蛋白質收量에 미치는 影響
全炳台,李相武 建國大學校 自然科學硏究所 1995 建國自然科學硏究誌 Vol.6 No.-
A field experiment was conduted to evaluate growth characteristics, cry matter and crude protein yield according to in Sorghum×Sudangrass hybrid-Soybean intercropping, and number of practicable cutting frequency and decide ideal harvasting time for use of forage and silage. Experiment design was arranged with 14 different treatment as a randomized block design(the same of monocropping and intercropping did 170cm, 220cm, boot head, dough, and yellow stage). The mean plant length of intercropping treatment at the same treatment of growth stage was high at all treatment than monocropping. Soybean showed the highest at dough stage treatment as 145cm but, to boot stage treatment but 220cm treatment showed on the contraty the shortest as 93cm. The intercropping was higher than monocropping at the leaf length of sorghum×sudangrass hybrid, but the leaf width showed multifarious according to number of practicable cutting. Leaf length of soybean was increased from 170cm treatment to boot stage treatment, but decreased from head stage treatment to yellow stage treatment. The stem diameter(means) of intercropping sudangrass at the same treatment of growth stage was higher than monocropping, Especially, in the stem diameter(means) of soghum×sudngrass hybrid, intercropping treatment of boot stage treatment ws the thickest as 11.5mm, monocropping treatment of head stage treatment was the lowest as 7.6mm, stem hardness of intercropping and monocropping at the first cutting time was rapidly hardening after boot stage. Also, In the soybean, stem hardness was rapidly hardening after headstage treatment, and yellow stage treatment was almost hardness as wood. Intercropping treatment at the same treatment of growth stage was higher than monocropping at the leaf numbers(1st, 2nd, 3rd, and 4th cutting time). Leaf numbers of soybean was increased from 170cm treatment to boot stage treatment, but decreased from milk stage treatment to yellow stage treatment. In the leaf ratio of sorghum×sudangrass hybrid (means), intercropping was decreased compare to monocropping. Especially, intercropping was showed below 15%after boot stage. Also, leaf ratio of soybean was high to early growth, but dough and yellow stage treatment were lower than other treatments as 18.8% and 15.0% at leaf ratio Fresh weigh of monocropping treatment at the same treatment of growth stage as highest as 101,700kg/ha, but yellow treatment was the lowest as 67,794kg/ha. Dry matter yield showed a little difference between intercropping and monocropping from 170cm treatment to boot stage treatment, but showed high difference after milk stage. Especially in intercropping treatment, dough stage was the highest as 21,161 kg/ha, but 170cm treatment was the lowest as 12,929kg/ha. In the intercropping and monocropping, 170cm treatment was able to cutting 4 frequency and 220cm treatment and boot stage treatment were able to cutting 3 frequency a year without yield difference. But yellow stage was able to cutting 1 frequency because 2nd cutting showed very low dry matter yield. Protein yield of intercropping treatment at the same growth stage was higher than monocropping on the contrary fresh yield and dry matter yield. Especially, head stage treatment of intercropping treatment was the highest as 1,684kg/ha. The protein yield was high at the intercropping in order of head stage〉milk stage〉boot stage〉dough stage〉220cm〉170cm.
Analysis of Aroma Compound Profiles in Doenjang (Soy Paste) Made from Twelve Different Soybeans.
Byong Won Lee,Tae Joung Ha,Kiwoung Yang,Jong Min Ko,Hyun Tae Kim,Young Hun Lee,Myeong Gi Jeon,Myeong Gi Jeon,Ha Sik Sim,Sang-Ouk Shin,Chan-Sik Jung,In Youl Baek,Keum Yong Park 한국작물학회 2010 한국작물학회 학술발표대회 논문집 Vol.2010 No.04
Fermented soybean food is one of most economical and health food due to its valuable nutritional and medicinal attributes and have been consumed for centuries as flavoring ingredient in Korea. On fermented soybean food such as doenjang, aroma compounds are important property because they determine taste and grade of fermentation. This study investigated variety of aroma compounds of doenjang made from different soybean genotypes. Aroma compounds in twelve different doenjang made from two cultivar (Daewon and Taekwang) and ten elite lines were extracted by steam distillation extraction (SDE) method and analyzed by gas chromatography/mass spectrometry (GC/MS). Aroma compound were detected over 80 kinds in eight samples (Daewon, Taekwang, MY177, MY187, MY189, MY192, MY204 and MY205) and under 70 kinds in four samples (yeonchun1, MY188, MY203 and MY206). Among the detected aroma components, 47 compounds were assigned as aromatic compounds (21), long chain fatty acid (13), short chain fatty acid (5) and others (8) by the computer library (Wiley 7n program). The major aroma compounds in twelve different doenjang were benzaldehyde, benzeneacetaldehyde, 2-methoxy-4-vinylphenol, pyrazine type compounds, cysteaminesulfonic acid, palmitic acid, oleic acid and linoleic acid. Each doenjang made by same condition (microbe, temperature, aging time and etc) had a difference in ratio and variety of aroma compounds due to different components having soybean genotype.
Jeon, Byong-Tae,Cheong, Sun-Hee,Kim, Dong-Hyun,Park, Jae-Hyun,Park, Pyo-Jam,Sung, Si-Heung,Thomas, David G.,Kim, Kyoung-Hoon,Moon, Sang-Ho Asian Australasian Association of Animal Productio 2011 Animal Bioscience Vol.24 No.9
This study was conducted to provide the basic information to allow improved scientific assessment of velvet antler's quality by investigating the change of chemical composition during different antler growth stages in elk (Cervus elaphus canadensis). Twenty four antlers were harvested from elk stags (aged 4-5 years) on 65 days (VA65), 80 days (VA80) and 95 days (VA95) after button casting, and the chemical composition of each antler was determined in five sections (top, upper, middle, base, and bottom). Crude protein and ether extract content was the highest in the top section, whereas ash content was the highest in the bottom section in all groups (p<0.05). Glycosaminoglycan (GAG) content was higher in the VA65 group than in the VA95 group in the upper section of antler (p<0.05). The collagen content was higher in the VA65 group compared to the VA95 group in the middle and bottom sections (p<0.05), and increased downward from the top to the bottom section. The proportions of certain amino acids, including aspartic acid, glutamic acid and isoleucine were higher (p<0.05), whereas proline and glycine were lower in the top section of antler compared to all other sections (p<0.05). The proportion of linoleic acid, 11,14,17-eicosatrienoic acid, total ${\omega}$-3 and ${\omega}$-6 fatty acids and polyunsaturated fatty acids (PUFAs) for all sections in the VA65 group was higher than in the VA95 group (p<0.05). These results suggested that the quality of velvet antler is strongly influenced by antler development stage.
Others : Studies on the Physiological characteristics of (Cervus e. canadensis) Velvet Antler in Elk
( Byong Tae Jeon ),( David G Thomas ),( Sun Hee Cheong ),( Myeong Hwa Kim ),( Sung Jin Kim ),( Si Heung Sung ),( Pyo Jam Park ),( Jae Hyun Park ),( Sang Ho Moon ) 한국동물자원과학회 ( 구 한국축산학회 ) 2010 한국축산학회지 Vol.52 No.3
Jeon, Byong Tae,Kim, Kyoung Hoon,Cheong, Sun Hee,Kang, Sung Ki,Park, Pyo Jam,Kim, Dong Hyun,Jung, Ho Sung,Park, Jae Hyun,Thomas, David G.,Moon, Sang Ho CSIRO Publishing 2012 Animal production science Vol.52 No.1
<P> The purpose of the present study was to investigate the changes in structural and chemical properties of sika deer antler at different stages of its growth in order to improve scientific assessment of antler’s quality. Eighteen antler samples, harvested on 40, 50 and 60 days after casting were collected from randomly selected deer farms, and the structural properties of antlers were examined. The chemical composition of each antler was determined in the upper, middle and basal section. Our results showed that the crude protein, crude fat (ether extract), uronic acid and sialic acid increased markedly from the base to the upper section, but the ash was higher in the basal section. Collagen content increased significantly from the upper to the basal section in all groups. The structural factors, including length and girth were positively or negatively correlated with the chemical composition such as glycosaminoglycans, ether extract-fat, ash, uronic acid, sialic acid, total sugar and collagen content. These findings may provide useful basic information and identify biomarkers for the association between structural properties and chemical composition during antler growth period, which should facilitate efficient production of high quality antlers for food consumption and as pharmaceutical agents. </P>
Evaluation of Physically Effective Fiber for Distributing Total Mixed Rations in Korea
Jeon, Byong Tae,Kim, Kyoung Hoon,Kim, Myeong Hwa,Oh, Mi Rae,Li, Hongliang,Moon, Sang Ho The Korean Society of Grassland and Forage Science 2013 한국초지조사료학회지 Vol.33 No.3
This study was carried out to evaluate the physical characteristics of total mixed rations (TMR) prepared in Korea for improving productive effectiveness of dairy and beef cattle. The 40 samples of commercial TMR for dairy and beef cattle in 6 municipals were collected and analyzed for chemical composition and physical properties. There were significant regional differences (p<0.05) in dry matter and crude protein contents of TMR for dairy and beef cattle. In roughage value index (RVI), neutral detergent fiber (NDF) content, and physically effective NDF (peNDF)$_{1.18}$ content, there were no regional differences in TMR for dairy cattle, but there were significant regional differences (p<0.05) in TMR for beef cattle. Thus the results from this study support that because RVI, NDF content, and peNDF content in TMR for dairy and beef cattle exceeded recommended ranges, a little adjustment in TMR for dairy cattle will be necessary to obtain optimal productivity.