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Development of Continuous Galvanization-compatible Martensitic Steel
( Y. F. Gong ),( T J. Song ),( Han S. Kim ),( J H Kwak ),( B. C De Cooman ) 한국부식방식학회 2012 Corrosion Science and Technology Vol.11 No.1
The development of martensitic grades which can be processed in continuous galvanizing lines requires the reduction of the oxides formed on the steel during the hot dip process. This reduction mechanism was investigated in detail by means of High Resolution Transmission Electron Microscopy (HR-TEM) of cross-sectional samples. Annealing of a martensitic steel in a 10% H2 + N2 atmosphere with the dew point of-35˚C resulted in the formation of a thin c-xMnO.Si02 (x>l) oxide film and amorphous a-xMnO.SiO2 oxide particles on the surface. During the hot dip galvanizing in Zn-0.13%Al, the thin c-xMnO.SiO2 (x>1) oxide film was reduced by the Al. The a-xMnO.SiO2 (x<0.9) and a-S102 oxides however remained embedded in the Zn coating close to the steel/coating interface. No Fe2AIZn inhibition layer formation was observed. During hot dip galvanizing in Zn-0.20%AI, the c-xMnO.Si02 (x>l) oxide film was also reduced and the amorphous a-xMnO.SiO2, and a-SiO2 particles were embedded in the Fe2M5Zn inhibition layer formed at the steel/coating interface during hot dipping. The results clearly show that Al in the liquid Zn bath can reduce the crystalline c-xMn, SiO2 (x>l) oxides but not the amorphous a-xMnO.SiO2 (x<0.9) and a-Si02 oxides. These oxides remain embedded in the Zn layer or in the inhibition layer, making it possible to apply a Zn or Zn-alloy coating on martensitic steel by hot dipping. The hot dipping process was also found to deteriorate the mechanical properties, independently of the Zn bath composition.
Genome Sequence of the Plant Growth-Promoting Rhizobacterium Bacillus sp. Strain JS
Song, J. Y.,Kim, H. A.,Kim, J.-S.,Kim, S.-Y.,Jeong, H.,Kang, S. G.,Kim, B. K.,Kwon, S.-K.,Lee, C. H.,Yu, D. S.,Kim, B. S.,Kim, S.-H.,Kwon, S. Y.,Kim, J. F. American Society for Microbiology 2012 Journal of Bacteriology Vol.194 No.14
Liu, Y.F.,Zhao, H.B.,Liu, X.M.,You, W.,Cheng, H.J.,Wan, F.C.,Liu, G.F.,Tan, X.W.,Song, E.L.,Zhang, X.L. Asian Australasian Association of Animal Productio 2016 Animal Bioscience Vol.29 No.10
The objective of this study was to evaluate the effect of diets containing different amounts of wheat, as a partial or whole substitute for corn, on digestibility, digestive enzyme activities, serum metabolite contents and ruminal fermentation in beef cattle. Four Limousin${\times}$LuXi crossbred cattle with a body weight ($400{\pm}10kg$), fitted with permanent ruminal, proximal duodenal and terminal ileal cannulas, were used in a $4{\times}4$ Latin square design with four treatments: Control (100% corn), 33% wheat (33% substitution for corn), 67% wheat (67% substitution for corn), and 100% wheat (100% substitution for corn) on a dry matter basis. The results showed that replacing corn with increasing amounts of wheat increased the apparent digestibility values of dry matter, organic matter, and crude protein (p<0.05). While the apparent digestibility of acid detergent fiber and neutral detergent fiber were lower with increasing amounts of wheat. Digestive enzyme activities of lipase, protease and amylase in the duodenum were higher with increasing wheat amounts (p<0.05), and showed similar results to those for the enzymes in the ileum except for amylase. Increased substitution of wheat for corn increased the serum alanine aminotransferase concentration (p<0.05). Ruminal pH was not different between those given only corn and those given 33% wheat. Increasing the substitution of wheat for corn increased the molar proportion of acetate and tended to increase the acetate-to-propionate ratio. Cattle fed 100% wheat tended to have the lowest ruminal $NH_3-N$ concentration compared with control (p<0.05), whereas no differences were observed among the cattle fed 33% and 67% wheat. These findings indicate that wheat can be effectively used to replace corn in moderate amounts to meet the energy and fiber requirements of beef cattle.
Jiang, J.F.,Song, X.M.,Huang, X.,Zhou, W.D.,Wu, J.L.,Zhu, Z.G.,Zheng, H.C.,Jiang, Y.Q. Asian Australasian Association of Animal Productio 2012 Animal Bioscience Vol.25 No.10
A study was conducted to evaluate effects of alfalfa meal on growth performance and gastrointestinal tract development of growing layer ducks to provide evidence for application of alfalfa meal in the duck industry. Two hundred and fifty-six healthy Shaoxing 7-wk old growing layer ducks were selected and randomly allocated to 1 of 4 dietary treatments based on corn and soybean meal and containing 0, 3, 6, and 9% of alfalfa meal for 8 wks. Each treatment consisted of 4 replicates of 16 ducks each. Briefly, birds were raised in separate compartments, and each compartment consisted of three parts: indoor floor house, adjacent open area and a connecting water area. The results showed: i) Growing ducks fed alfalfa meal diet were not significantly different in average daily gain, feed intake and gain-to-feed ratio from those fed no alfalfa diet (p>0.05). ii) Alfalfa meal increased the ratio crop, gizzard to live weight, caecum to live weight, the caecum index of growing ducks (p<0.05). iii) Villus height in duodenum and jejunum of growing ducks increased significantly with the increase of alfalfa meal levels (p<0.05). Crypt depth in duodenum and jejunum of growing ducks decreased significantly with the increase of alfalfa meal levels (p<0.05). This experiment showed that feeding of alfalfa meal to growing layer ducks could improve gastrointestinal tract growth and small intestinal morphology without effect on performance. This experiment provides evidence that alfalfa meal is a very valuable feedstuff for growing layer ducks.
Wang, Y.,Yuk, H.J.,Kim, J.Y.,Kim, D.W.,Song, Y.H.,Tan, X.F.,Curtis-Long, M.J.,Park, K.H. Pergamon Press 2016 Bioorganic & medicinal chemistry letters Vol.26 No.2
Protein tyrosine phosphatase 1B (PTP1B) is an important target to treat obesity and diabetes due to its key roles in insulin and leptin signaling. The MeOH extracts of the root bark of Flemingia philippinensis yielded eight inhibitory molecules (1-8) capable of targeting PTP1B. Three of them were identified to be novel compounds, philippin A (1), philippin B (2), and philippin C (3) which have a rare 3-phenylpropanoyl chromenedione skeleton. The other compounds (4-8) were known prenylated isoflavones. All compounds (1-8) inhibited PTP1B in a dose dependent manner with IC<SUB>50</SUB>s ranging between 2.4 and 29.4μM. The most potent compound emerged to be prenylated isoflavone 5 (IC<SUB>50</SUB>=2.4μM). In kinetic studies, chromenedione derivatives (1-3) emerged to be reversible, competitive inhibitors, whereas prenylated isoflavones (5-8) were noncompetitive inhibitors.
Liu, Y.L.,Song, G.L.,Yi, G.F.,Hou, Y.Q.,Huang, J.W.,Vazquez-Anon, M.,Knight, C.D. Asian Australasian Association of Animal Productio 2006 Animal Bioscience Vol.19 No.8
This experiment was conducted to compare the effects of feeding DL-2-hydroxy-4-(methylthio)butanoic acid (HMTBA) and DL-methionine (DLM) supplemented corn-soybean-cottonseed meal diets on growth performance, carcass composition, and muscle color of broilers. The trial was designed as a $2{\times}3{\times}2$ factorial experiment, including two methionine (Met) sources (HMTBA and DLM), three equimolar graded levels of Met supplementation (i.e., 0.08, 0.16, and 0.24% in the starter diet and 0.07, 0.14, and 0.21% in the grower and finisher diets, respectively), and two sexes (male and female). Additionally, one basal diet for each sex was formulated to be limiting in Met to test the dosage response of increasing supplemental Met levels. Four hundred and twenty 10-d-old broilers were randomly allotted to 14 treatments (seven each for males and females), with five replicate pens per treatment and six chicks per pen. There was no difference (p>0.05) between the two Met sources in growth performance and muscle deposition of broilers throughout the whole experimental period (d 10 to 49). With the increasing Met supplementation levels, average daily gain was increased (quadratic; p<0.01) during the starter, grower, and overall phases, average daily feed intake was increased (quadratic; p<0.01) during the starter phase, and feed:gain ratio was decreased (quadratic; p<0.05) during the grower and overall phases. At the end of finisher phase, Met supplementation increased breast muscle content (quadratic; p<0.01) and thigh muscle content (linear; p<0.05), and decreased abdominal fat content (quadratic; p<0.02). Compared to the broiler fed DLM, broilers fed HMTBA had superior breast and thigh muscle coloration (p<0.01). Male broilers had higher weight gain and feed intake and better feed conversion than female broilers (p<0.01). The fat content of thigh muscle in female broilers was higher than that of male broilers (p<0.03). The best fit comparison of HMTBA vs. DLM was determined by Schwarz Bayesian Criteria index, which indicated that the average relative bioefficacy of HMTBA vs. DLM was 120% with 95% confidence limit 67 to 172%. These results indicated that Met supplementation improved growth performance and carcass quality of broilers fed corn-soybean-cottonseed meal diets irrespective of Met sources. Compared to DLM, HMTBA has the same molar bioefficacy on improving the growth performance and carcass quality of broilers; however, HMTBA fed birds had superior meat color to DLM fed birds.
Genome Sequence of the Hemolytic-Uremic Syndrome-Causing Strain Escherichia coli NCCP15647
Jeong, H.,Zhao, F.,Igori, D.,Oh, K.-H.,Kim, S.-Y.,Kang, S. G.,Kim, B. K.,Kwon, S.-K.,Lee, C. H.,Song, J. Y.,Yu, D. S.,Park, M.-S.,Cho, S.-H.,Kim, J. F. American Society for Microbiology 2012 Journal of Bacteriology Vol.194 No.14
Genome Sequence of the Shiga Toxin-Producing Escherichia coli Strain NCCP15657
Kim, B. K.,Song, G. C.,Hong, G. H.,Seong, W.-K.,Kim, S.-Y.,Jeong, H.,Kang, S. G.,Kwon, S.-K.,Lee, C. H.,Song, J. Y.,Yu, D. S.,Park, M.-S.,Cho, S.-H.,Kim, J. F. American Society for Microbiology 2012 Journal of Bacteriology Vol.194 No.14
Jeng U.,Hsu C.-H.,Sun Y.-S.,Lai Y.-H.,Chung W.-T.,Sheu H.-S.,Lee H.-Y.,Song Y.-F.,Liang K. S.,Lin T.-L. The Polymer Society of Korea 2005 Macromolecular Research Vol.13 No.6
We review the recent SAXS activity on the 1.5-GeV electron storage ring at the National Synchrotron Radiation Research Center (NSRRC). Typical measurements featuring in grazing incident SAXS for soft materials are illustrated. Complex measurements using simultaneous SAXS/DSC and SAXSIWAXS for the correlations between the crystallization and mesoscale ordering in a polymer blend and a polypeptide-block-polypseudorotaxane diblock copolymer are presented. We also introduce a dedicated SAXS beamline which is planned at NSRRC.