This study was conducted to investigate the nutritional composition and meat quality properties of Hanwoo steer beef by different cut. Ten cuts [Abjin (short plate), Bosup (top sirloin), Cheggt (striploin), Dngsim (loin), Guri (chuck tender), Hongduke (eye of round), Moksim (chuck roll), Sulgit (bottom round), Udoon (top round), Yanaji (brisket)] prepared from 10 Hanwoo steers (28-30 months old) were used for this experiment. The range of pH was 5.46-5.64. In the chemical analysis, Hongduke contained highest protein contents (21.15%) and Dngsim had lowest protein contents (16.94%) (p<0.05). Fat contents were higher in Dngsim whereas those of Guri, Hongduke and Udoon were significantly lower when compared to the other cuts (p<0.05). There were not significantly different in meat color (L, a and b values) properties only except that L values were significantly higher in Dngsim among 10 cuts (p<0.05). Cooking loss (%) was higher in Guri, Hongduke, Udoon and Yangji whereas it was significantly love. in Cheggt (p<0.05). Warner-Bratzler shear force (WBS) was significantly higher in Abjin $(6.24inch^2/kg)$, whereas Dngsim $(3.45inch^2/kg)$ and Cheggt $(3.50inch^2/kg)$ were significantly lower than the other cuts (p<0.05). There was no significant difference in water-holding capacity (WHC) among 10 cuts (p>0.05). Total amino acid contents were significantly higher in Hongduke (p<0.05). Hongduke was highest in most kinds of amino acids, however, Udoon had the highest methionine and histidine contents among 10 cuts (p<0.05). Glutamate contents were high in all cuts and followed by aspartate, leucine and lysin. With regard to mineral contents, Ca was ranged from 47.63-70.69 mg/kg and Fe was ranged from 15.09-26.68 mg/kg in 10 cuts. Zn was highly contained in Guri (50.56 mg/kg) when compared to the other cuts (p<0.05).
Kim, Hee-Yun;Lee, Young-Ja;Hong, Ki-Hyoung;Ha, Sang-Chul;Ahn, Myung-Su;Jo, Jae-Sun;Kim, Kil-Saeng
Korean Journal of Food Science and Technology
/
v.30
no.4
/
pp.767-774
/
1998
This study has been carried out to measure the amount of the daily intake by Korean on preservatives (Dehydroacetic acid, Benzoic acid and ρ-Hydroxybenzoic acid asters) in foods. The amounts of preservatives were determined by HPLC in foods such as butter, cheese, margarine, aloe gel, carbonated beverages, mixed beverage, ginseng beverage, red ginseng drink, soy sauce, fruit and vegetable juices (except unheated fruit-vegetable juice), vineger, seasonings, fruit and vegetables only on the peel, fruit wine, rice wine and unrefined rice wine. The recovery ranges were found to be 99.2% for dehydroacetic Acid, 95.8% for benzoic acid and $94.2{\sim}97.2%$ for ${\rho}-hydroxybenzoic$ acid in foods, respectively. The data of average food intake for each food items per capita per day were obtained from the report of national nutrition survey carried by the Ministry of Health and Welfare in 1997. The detected number of samples and average intake range of preservatives have been figured cut to $ND{\sim}290.0{\;}ppm$ for dehydroacetic acid, $ND{\sim}400.0{\;}ppm$ for benzoic acid and $ND{\sim}93.9{\;}ppm$ for ${\rho}-hydroxybenzoic$ acid esters, respectively. Estimated daily intake (EDI) of each additives per capita per day were shown as follows; 1.56 mg for dehydroacetic acid, 2.25 mg for benzoic acid and 0.44 mg for ${\rho}-hydroxybenzoic$ acid esters in total respectively and these values were evaluated to be much lower than that of FAO/WHO's acceptable daily intake (ADI) $0{\sim}5{\;}mg/kg$ b.w./day for benzoic acid and $0{\sim}10{\;}mg/kg$ b.w./day for ${\rho}-hydroxybenzoic$ acid esters.
The purpose of this study was to evaluate the influence of the AH-26 root canal sealer on the shear bond strength of composite resin to dentin. One hundred and forty four (144) extracted, sound human molars were used. After embedding in a cylindrical mold, the occlusal part of the anatomical crown was cut away and trimmed in order to create a flat dentin surface. The teeth were randomly divided into three groups; the AH-26 sealer was applied to the AH-26 group, and zinc-oxide eugenol (ZOE) paste was applied to the ZOE group. The dentin surface of the control group did not receive any sealer. A mount jig was placed against the surface of the teeth and the One-step dentin bonding agent was applied after acid etching. Charisma composite resin was packed into the mold and light cured. After polymerization, the alignment tube and mold were removed and the specimens were placed in distilled water at $37^{\circ}C$ for twenty four hours. The shear bond strength was measured by an Instron testing machine. The data for each group were subjected to one-way ANOVA and Tukey's studentized rank test so as to make comparisons between the groups. The AH-26 group and the control group showed significantly higher shear bond strength than the ZOE group (p<0.05). There were no significant differences between the AH-26 group and the control one (p>0.05). Under the conditions of this study, the AH-26 root canal sealer did not seem to affect the shear bond strength of the composite resin to dentin while the ZOE sealer did. Therefore, there may be no decrease in bond strength when the composite resin core is built up immediately after a canal filling with AH-26 as a root canal sealer.
In this study we evaluated the influence of both the thickness of residual enamel and the color of the composite resins applied to lingual surface on the labial surface color. Background plates were made by randomly (A1, A2, A6D, B1, B2, B3, C1, C2, C6D) selected colors of Filtek Supreme (3M ESPE, St. Paul, U.S.A.) composite resin. Crown portion of 9 maxillary central incisors were cut off and embedded with acrylic resin except labial surface. Samples of average thickness of 2.2 mm were obtained after cutting it in a thickness of 2.5 mm from the labial surface and sandpaper polish. The shade of composite resin background was measured using Spectrophotometer ($Spectrolino^{(R)}$, GretagMacbeth, Regensdorf, Switzerland). And CIE $L^{\ast}a^{\ast}b^{\ast}$value of 2.2 mm thickness tooth samples were measured on the 9 composite resin backgrounds. And then, the cutting side of tooth samples was ground to the extent of 1.9 mm, 1.6 mm, 1.3 mm, 1.0 mm and placed on composite resin backgrounds and measured $L^{\ast}a^{\ast}b^{\ast}$values with the same method. In all samples, $L^{\ast}$value and $b^{\ast}$value seemed to have a tendency of decreasing as thickness of tooth sample becomes thinner regardless of background colors (p < 0.05). But, $a^{\ast}$value didn't show the significant differences depending on the thickness.
LEE Kang-Ho;CHO Ho-Sung;KIM Dong-Soo;HONG Byeong-Il;PARK Cheon-Soo;KIM Min-Gi
Korean Journal of Fisheries and Aquatic Sciences
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v.26
no.3
/
pp.214-220
/
1993
Browning of ascidian, Halocynthia roretzi, meat occurres very rapidly when skinned off or cut during processing and it resulted the quality loss of fresh frozen, dehydrated or fermented products. In this study, the causes of color development and prevention of browning were experimented. The browning of ascidian meat may be occurred enzymatically by a tyrosinase contained in meat and viscera which acted specifically on L-tyrosine as a substrate rather than on catechol. Activity of the enzyme in viscera was three times higher than in meat. The optimum pH and temperature on the tyrosinase activity of crude enzyme obtained from ascidian was 6.0 and $30{\sim}35^{\circ}C$, respectively. The enzyme was inactivated heating at $80^{\circ}C$ for 3 minutes or $90{\sim}100^{\circ}C$ for 1 minute and it was inhibited by $0.1{\sim}0.5mM$ solutions at ascorbic acid, sodium hydrogen sulfite, cystein, citric acid, cyanide but only sodium hydrogen sulfite treatment was effective to retard such a high content of enzyme as in case of viscera. In practical use for processing of ascidian meat browning was retarded by dipping the viscera removed ascidian meat in 0.2M citric acid for 5 minutes or $0.2\%$ sodium hydrogen sulfite solution for 1 minute resulting in sulfur dioxide residue less than 100 ppm.
The processing times of the works, chainsaw felling, axe trimming and hand skidding to the corridor, by one-man-work method per single pole timber were investigated in the thinning young Japanese larch stand at the Training Forests of the Forest Work Tranining Center in Kangwon-do. The works were performed by a skilled worker with the craftman qualification and 69 trees were cut. Time was checked at intervals of 25/100 minute by the multimoment method and the worker's efficiency was evaluated for every cycle. Total working time was 8.11 hours of which 90% was for thinning work and 10% for cleaning work. Of the total working hours, 82.7% was net working time, 12.3% was general working time and 4.9% was non-valuated time. Of the net working time, 5.9hours, for only thinning, 20.9% was spent on moving to the feeling tree, 27.1% was spent on felling, 40.5% was spent on trimming and 11.5% was spent on skidding to corridor. Net chainsaw operating time was 0.94 hour which included 0.2 hour for cleaning work. Of the net chainsaw operating time, 0.94 hour, 66% was operating time and 34% was idle running time. The basic and general working times by DBH classes with application of 130% worker's efficiency calculated from regression equations were shown in table 1. For better practical using of this table, the simplified proposal was given in table 2.
Park, Hyung-Bae;Kim, Jin-Sung;Jang, Sang-Ruyl;Park, Sung-Chan;Suh, Hye-Sao;Lee, Kwang-Hun;Kim, Young-Uck;Kim, Chang-Su
Journal of Yeungnam Medical Science
/
v.12
no.1
/
pp.56-74
/
1995
The authors applied ADDES-HV parent evaluation scale for the purpose of screening test to 538 2nd grade elementary school students from March 1994 to May. The results were as follows: There was no differences in scores of ADHD between schools. In comparing the male and female between three school students, male students showed signifieant high scores (p<0.05) than female students in the score of ADDES-HV subscale and total. There was no significant differences in ADDES-HV scale between male students and female students in both ADHD patients and normal controls. In reliability test for test and retest, the reliability coefficient was higher satisfatorily and that of inattention was 0.80, inpulsivity was 0.69, hyperactivity was 0.63 and the total score was 0.82. In reliability test by internal consistancy, the Cronbach ${\alpha}$ coefficient of patient group was 0.85(p<0.05) and that of normal control was 0.84(p<0.05). The Concurrent validity between ADDES-HV scale and DSM-III-R scale was 0.57(p<0.05) in ADHD patient group and 0.84(p<0.05) in normal control group. In discriminant validity test between ADHD patient group and normal control, the ADHD patient group showed higher score(p<0.05). The total disciminant capacity of the patient group in ADDES-HV scale was 94.44%. When we regard the cut off point as standard deviation 1.5, the male student was 80 score and the female student was 69 score. In this point of view, ADDES-HV scale was proved to be the useful screening test tool for ADHD research and showed higher reliability and validity in applying to Korean subjects.
This study was conducted on greenhouses whose side heights had been raised after the columns of 1-2W basic type greenhouses had been cut and welding with the same-sized pipes. When the wind load or snow load affects restructured pipe greenhouse like this, those parts will be structurally unsafe. To examine this, the bending strength of welded columns were measured through four stages and compared with the pipes in their original condition. Results are as follows. In the case of a bending test on welded joints about steel pipes used for greenhouses, satisfactory results couldn't be drawn because sections of both ends and the loading parts couldn't endure loads and sank regardless of loading methods. Partial problems could be solved by inserting inside pipe(steel bar) at the sections and the loading parts, but it was necessary to devise more satisfactory bending test methods. The strength of welded joints wasn't much different compared with original conditions and demonstrated only slight differences according to the sample production conditions. However, significant incompleteness in the welding process was expected to cause a decisive loss in strength. On the assumption that there were no problems in the welding process or with regard to the inclination of sub materials for columns after connection, it was deemed reasonable to assume that the strength of welded pipes was about 84~90% of the strength of the pipes in their original condition. Considering mid- and long-term strength decline following the onset of rust at joints or welding sections, structural changes in the main sub materials that are used for greenhouses at farmhouses have to be avoided to ensure structural safety, unless these changes are inevitable.
Hwang, In Taek;Cho, Kyung Chul;Kim, Hee Gon;Ki, Gwang Yeon;Yoon, Bong Ki;Kim, Jung Guen;Lim, Jin Hee;Choi, Sung Ryul;Shin, Hak Ki
FLOWER RESEARCH JOURNAL
/
v.17
no.4
/
pp.251-255
/
2009
This study was conducted to investigate effect of ionic strength and feeding times of a nutrient solution on reduction of stem cavity size and improvement of flower quality in chrysanthemum 'Baekma'. A nutrient solution was applied with different strengths at three stages, namely, transplanting, budding, and flowering. The solution EC was adjusted as 1.61.82.0, 1.81.81.8, 1.82.01.8, and $2.02.02.0dS{\cdot}m^{-1}$ in four treatments. Feeding frequency per a day were 4 times for 12 min., 8 times for 6 min., 12 times for 4 min., and 18 times for 2.7 min. each. Cut flower length as affected by different strengths of a nutrient solution was the greatest in the plot of EC $2.02.02.0dS{\cdot}m^{-1}$. However number of leaves, stem diameter, and leaf size were greater in EC $1.82.01.8dS{\cdot}m^{-1}$ than in other treatments. Also, petal number of petals was the greatest and stem cavity size was the smallest in the plot of EC $1.81.81.8dS{\cdot}m^{-1}$. Plant height, number of leaves, stem diameter, leaf size were greater in the plot with 12 times feed ing per a day. number of petal was most in the plot with 8 times feeding per day, while stem cavity size was the smallest in the plot with 12 times feed ing per a day. Therefore, the better plant growth, the smaller stem cavity size.
Park, In Sook;Park, Song Kyoung;Naing, Aung Htay;Hwang, Yoon Jung;Kang, Si-Yong;Lim, Ki Byung
FLOWER RESEARCH JOURNAL
/
v.18
no.3
/
pp.165-170
/
2010
This study was carried out to investigate the effect of three different growth retardants for applying pot or bedding plant with 'Rialto', 'Elodie', and 'Raizan'. Ancymidol, uniconazole, and paclobutrazol were applied as a drench at various concentrations. In Oriental hybrid lily 'Rialto', no changes were observed not only plant height but also leaves and flowers in paclobutrazol treatment. But the growth of plant treated with ancymidol was inhibited above 30% compare to control regardless of concentrations. However, numbers of leaf and flower per plant were similar to those of controls. Plant height was similar to nontreated control in $1mg{\cdot}L^{-1}$ uniconazole treatment but that reduced about 30% in drench application of 5 and $10mg{\cdot}L^{-1}$ uniconazole. Asiatic hybrid lily 'Elodie' was not different in growth between application of paclobutrazol and nontreatment as 'Rialto'. While, in all ancymidol treatments, plant height was 50~60% shorter than that of control. Also, numbers of leaves were reduced and days to flowering were slightly delayed in $30mg{\cdot}L^{-1}$ ancymidol treatment as compared with the control. All traits except plant height of $1mg{\cdot}L^{-1}$ uniconazole were similar to control but there were differences of statistical significance between 5, $10mg{\cdot}L^{-1}$ uniconazole drench and nontreated control. Lilium ${\times}$ formolongi 'Raizan' like above two cultivars had no dwarf effect on height in paclobutrazol treatment. In drench application of ancymidol, plant height reduced over 60% than that of control regardless of concentrations. Especially, days to flowering were a little delayed with $30mg{\cdot}L^{-1}$ paclobutrazol treatment. Plant height of $10mg{\cdot}L^{-1}$ uniconazole was about 26% shorter than that of control, but other traits were no differences between uniconazole treatment and control. In result, the drench application of ancymidol and uniconazole was pretty effective for usage as pot lily without great changes of quantitative traits.
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