Journal of the Korea Organic Resources Recycling Association
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제11권1호
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pp.102-112
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2003
The objective of this study was to investigate the effects of food waste and probiotics supplementation on productive performance and egg composition of laying hens. Total 120 layers (Brown Tetran) 22 weeks old were divided into five groups with 4 replicates for each treatments and raised in battery cage. The experimental design was completely randomized. The egg Production rate was significantly increased in layer supplemented with 0%, 0.5%, 1.0% and 1.5% of probiotic supplemented diets compared to control (P<0.05). At feeding with food waste and probiotic supplementation had no effect on the egg shell strength (P>0.05). Haugh unit of the eggs was significantly increased in layers fed with 1.5% of probiotic supplemented diet (P<0.05). The different levels of inclusion of the food waste and probiotic supplementation had not effect on egg shell color, blood spot and albumen index of the eggs (P<0.05). There were not significant differences in over all acceptability, juiciness, texture and color of the eggs from layer fed with different levels of wood waste and probiotic supplementation. The appearance and flavor significantly deteriorated in eggs from layers fed with probiotic diets compared to control (P<0.05).
To mass-produce useful biopolymer films, chitosan/gelatin blend films were prepared by solution casting method. Effects of mixing ratio, tensile strength (TS), elongation (E) at break, total color difference (${\Dalta}E$), opacity, water vapor permeability (WVP), oxygen permeability (OP), and thermal properties on chitosan/gelatin blend films properties were investigated. TS, E, ${\Dalta}E$, opacity, WVP, and OP values were 58.24-22.01 MPa, 13.11-24.67%, 1.86-17.45, 0.3104-1.2161 nmO.D./${\mu}m$, $1.6875-1.7225ng{\cdot}m/m^{2}{\cdot}s{\cdot}Pa$, and $2.2380{\times}10^{-7}-2.2975{\times}10^{-7}\;mL{\cdot}{\mu}m/m^{2}{\cdot}s{\cdot}Pa$, respectively. TS of blend films decreased, while E, ${\Dalta}E$, and opacity increased with increasing chitosan content. WVP of blend films did not show any significant relationship with mixing ratio and thickness of blend films. Miscibility of films was examined over entire composition range by thermogravimetric analyzer (TGA) and dynamic mechanical analyzer (DMA). TGA results showed gelatin is more thermally stable than chitosan and some interactions among functional groups of two biopolymers. Glass transition temperature $(T_{2})$ of films as determined by DMA decreased with increasing content of chitosan in the blend. Results of thermal analysis indicate high miscibility among polymer components in the blend.
Journal of agricultural medicine and community health
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제17권1호
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pp.5-16
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1992
The maternal and child health is a basis of national health, and indicates the level of social welfare and health of the country, because it is related with community welfare status, general cultural conditions, and medical and health sciences. This is a study carried out to identify the present practices of maternal and child health care programs implemented by the private clinics located in Guns(counties ; rural area) in Kyungsangnam Province and to propose alternatives to improve their current programs through a self-administrative questionnaire. The subjects were 90 private physicians who operated their own clinics since 1990 and were general practitioners, Obstertrician/Gynecologists or pediatricians: This survey was conducted by mail from 15 January to 25 February 1992. The response rate was 94.4 percent. 1) The major manpower for MCH programs of the studied clinics was physicians and nurseaids. 70.3% of physicians were general practitioners, 81.1% of nursing manpower were nurseaids. 31.1% of the studied clinics employed lab-technicians. 89.2% of them had MCH room whatever the size and the setting, and 84.4% of Ob/Gyn clinics installed laboratory equipments. 2) 55.4% and 63.5% of the studied clinics provided 151 or above consulting services and curative services of MCH per physician a month respectively and 33.8% and 25.7% of them provided 10 or less consulting services and curative services per physician a month. 91.9% of lab-technicians had 10 or less laboratory tests per technician a month. 3) There was a difference between Ob/Gyn and pediatric clinics in terms of services delivered : for example, 80% of Ob/Gyn clinics provided pre- and post- natal care services, while 84.6% of pediatric clinics provided vaccinations for children. It was also found that only a few of general practitioners involved pre-and post- natal care services. 4) There were no clinics which had opened regular health education session but 24.3% of them had opened the sessions irregularly. Ob/Gyn clinics put emphasis on maternity and pediatric clinics did on child health, but general practitioners touched with both maternal and child health. 21.6% of the studied clinics had some kind of educational materials for MCH programs. Most of the materials were pamphlets or small booklets. 5) Proteinuria/glucosuria, blood pressure and blood type were tested in 48.6~69% of the studied clinics ; tests for blood sugar and hepatitis B were provided in 39.2~41.9% of them, most of them were done in Ob/Gyn clinics. 6) 41.9% of physicians, 29.7% of nurses and 45.9% of nurses-aids wanted to receive on-job-training for MCH programs.
This study was carried out to survey the eating behaviors and the food preferences of the tourism transportation business managers in Daegu areas by age. The survey was performed from 17 to August 25, 2003 by questionnaires and the subjects were 365 males. As a general factor, the subjects of survey were male drivers in their thirties to sixties. Their education level was middle school(44.9%) and high school(45.8%) diploma. This study showed that the managers eat three meals per day with high percentage(75.9%) and a large number of managers(24.1%) eat two meals only. 77.8% of the subjects responded that their diet life were irregular due to the property of their job. Frequency of eating-out turned out to be much higher in managers aged 60 over(p<0.001). They considered taste of the food firstly, and the prices of the food secondly, but the nutritional value of the food was considered with a low percentage(22.7%). We found that their BMI were overweight from 23.5 to 26.01, their calorie and some nutrient intakes were below their RDA. The most insufficiently consumed nutrient(less than 75% of RDA) was vitamin B₂ followed by calcium. The food preferences of subjects showed that the managers preferred boiled rice to any other rice as a staple foods. Their favorite menu of one-course Korean style meal turned out to be the bibimbob(boiled rice mixed with assorted vegetable and meat). As for subsidiary foods, out of all various meat soups, beef soups and beef-rib soups were most preferred. The most preferred stew were soybean paste stew and kimchi stew, and the most preferred cooked vegetables were cooked spinach, seasoned cucumber. Baechu kimchi(white cabbage kimchi) were the most preferred kind of kimchi. For desserts there was a very high preference for the watermelons, apples, and pears. For beverages the most preferred were ginseng tea, fruit juices and dietary fiber drinks. From the results listed above, the nutritional education needed to be done to the tourism transportation business managers to set the proper menu considering the characteristics of the preference each age group of managers.
This study investigated the quality characteristics of bread made with different additions of Chungkukjang powder (0, 10, 20%). In the microbiological evaluations, total aerobic bacteria increased with increases in Chungkukjang powder concentration and storage period ($20^{\circ}C$, 3 days). The pH also increased with increasing Chungkukjang powder concentration. For the color values, with increasing Chungkukjang powder content, the lightness (p<0.05) decreased in both the bread crumb and crust, while redness (p<0.05) increased. The yellowness decreased for the bread crust and increased for the bread crumb. Hardness and chewiness were higher, but springiness and cohesiveness were lower, in the breads made with 10 or 20% Chungkukjang powder as compared to the control. The control bread obtained the highest sensory scores for texture and overall acceptability during the storage period. Optimum sensory scores for color, texture, and overall acceptability were obtained for the bread with 10 % Chungkukjang powder until day 1 of storage. From the results of this study, 10% Chungkukjang powder can be added to bread without diminishing its acceptability, but further study is necessary on extending shelf-life and improving consumer acceptance.
In order to make acquire a potential use for Opuntia humifusa as a natural functional food material, this study was performed to determine the quality properties of Jeung-pyun made with added Opuntia humifusa, or prickly pear powder. According to an analysis of its major components, we found that the prickly pear powder consisteds of nitrogen-free extracts (71.85%) and crude fiber (11.20%). Greater additions of prickly pear powder had resulted in significantly lower pH in the of Jeung-pyun. According to measurements on the degree of Jeung-pyun gelatinization, by means of ${\beta}$-amylase, greater additions of prickly pear powder led to the higher levels of isolated maltose, indicating that the gelatinization degree of the Jeung-pyun became higher. Also, samples with higher concentrations of prickly pear powder had a tendency toward lower water content, which allowed us to expect a longer storage duration for the Jeung-pyun. In the textural property tests the Jeung-pyun that had less hardness and greater adhesiveness (p<0.05) than the control group as the content of prickly pear powder became higher. Also, the Jeung-pyunhad lower gumminess and chewiness than the control group as the content of prickly pear powder became higher. Therefore, it is possible to prepare relatively soft Jeung-pyun using prickly pear powder. For the color differences of the Jeung-pyun samples, lower L- values, and higher a- and b -values (p<0.05) presented as the addition level of prickly pear powder became higher. According to SEM observations of the Jeung-pyun, the added prickly pear powder addition groups generally showed a smaller and more inconsistent pore size, but higher porosity, than the control group. According to sensory analyses of the Jeung-pyun, the P2 group scored highest for color item, and the P4 group generated the fermented scent. Higher additions content of prickly pear powder led to the lower score, but higher scores for adhesiveness. Finally, the P2 group achieved the highest score for overall taste.
Joung, Ki Youeng;Song, Ka-Young;O, Hyeonbin;Zhang, Yangyang;Shin, So Yeon;Kim, Young-Soon
Journal of the East Asian Society of Dietary Life
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제27권1호
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pp.41-49
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2017
This study investigated the effects of teff flour on the properties of pound cakes. Five types of pound cakes were made by addition of 0% (Control), 5% (TF5), 10% (TF10), 15% (TF15), and 20% (TF20) of teff flour based on wheat flour. Specific gravity of pound cake batter showed no significant differences among samples as 0.54 (p<0.05). Baking loss was the highest in the control at 5.92% and the lowest in TF20 at 5.27%. Batter yield was the highest in TF20 at 94.73% and the lowest in control at 94.08%. Moisture content was the highest in TF20 at 23.68% and the lowest in control at 21.32%. pH showed no significant differences among samples at 7.61~7.65 (p<0.05). a-values of crumb significantly increased while L-values and b-values significantly decreased with added teff flour amounts. (p<0.05). ${\Delta}E$ values significantly increased with teff flour at 34.32~49.24 (p<0.05). Hardness was lowest in TF20 at $180.60g/cm^2$. Springiness was the lowest in TF20 at 85.37%. Cohesiveness showed no significant differences among samples (p<0.05). Chewiness was the lowest in TF20 at 172.17 g. Hardness more rapidly increased in control at $273.13{\sim}26,123.33g/cm^2$ than that of pound cakes with teff flour. Avrami exponent (n) was the highest in the control at 3.5987 and the lowest in TF20 at 1.2144. In sensory evaluation, flavor of TF20 was higher than that of the control at 4.43. Overall acceptability had a higher score in TF20 than in the control. It is considered that addition of 20% teff flour can improve the quality characteristics and retard retrogradation of pound cake.
Background : Mesenchymal stem cells (MSCs) are present in most of the tissue matrix, taking part in their regeneration when injury or damage occurs. The aim of this study was to investigate the presence of cells with pluripotential characteristics in human subchondral bone and the capacity of these cells to differentiate to osteoblast. Methods : Human subchondral bone were digested with collagenase. Isolated cells were cultured with a-MEM, 15% FBS, 10-8M dexamethasone and 50 ng/mL ascoric acid. Cells from 0 day(isolated cells), 7 day (first subculture) and 14 days (third subculture) were used to carry out phenotypic characterization experiments flowcytometry analysis with 11 monoclonal antibodies) and osteogenic differentiation experiments. Osteogenic differentiation of cells was assessment by quantification of bone extracellular matrix components by following analysis: alkaline phosphatase(ALP) stains to detect ALP activity, RT-PCR and western blot to detect osteocalcin (OCN), osteopontin (OPN) and type I collagen(Col I), and Alizarin red stains to detect calcium deposition. Results : Flowcytometry analyses showed that in our population more than 98% of cells were positive for MSC markers: SH-2(CD105, 99%), CD29 (95%), CD73 (95%). Cells were negative for hematopoietic markers (CD11b, CD34, and CD45). Furthermore, cells showed positive stain to multipotent markers such as CDl17 (c-kit) (15.1%), and CD166 (74.9%), and cell adhesion molecules such as CD54 (78.1%) and CD106 (63.5%). The osteogenic specific marker analyses showed that the culture of these cells for 7 and 14 days stimulates ALP, OCN, OPN and Col I synthesis by RT-PCR and Western blot analysis. Also, after 14 days in the culture of MSCs induces mineralization by Arizarin red stain. Conclusion : In this work, we demonstrated a new and efficient method for osteoblastic differentiation of human subchondral bone stem cells. As MSCs takes part in reparative processes of adult tissues, these cells could play an important role in osteogenesis.
Chattopadhyay, S.N.;Motoyama, N.;Rudra, A.;Sharma, A.;Sriram, S.;Overton, C.B.;Pandey, P.
JSTS:Journal of Semiconductor Technology and Science
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제7권3호
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pp.196-208
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2007
An analytical model is proposed for an optically controlled Metal Semiconductor Field Effect Transistor (MESFET), known as Optical Field Effect Transistor (OPFET) considering the diffusion fabrication process. The electrical parameters such as threshold voltage, drain-source current, gate capacitances and switching response have been determined for the dark and various illuminated conditions. The Photovoltaic effect due to photogenerated carriers under illumination is shown to modulate the channel cross-section, which in turn significantly changes the threshold voltage, drainsource current, the gate capacitances and the device switching speed. The threshold voltage $V_T$ is reduced under optical illumination condition, which leads the device to change the device property from enhancement mode to depletion mode depending on photon impurity flux density. The resulting I-V characteristics show that the drain-source current IDS for different gate-source voltage $V_{gs}$ is significantly increased with optical illumination for photon flux densities of ${\Phi}=10^{15}\;and\;10^{17}/cm^2s$ compared to the dark condition. Further more, the drain-source current as a function of drain-source voltage $V_{DS}$ is evaluated to find the I-V characteristics for various pinch-off voltages $V_P$ for optimization of impurity flux density $Q_{Diff}$ by diffusion process. The resulting I-V characteristics also show that the diffusion process introduces less process-induced damage compared to ion implantation, which suffers from current reduction due to a large number of defects introduced by the ion implantation process. Further the results show significant increase in gate-source capacitance $C_{gs}$ and gate-drain capacitance $C_{gd}$ for optical illuminations, where the photo-induced voltage has a significant role on gate capacitances. The switching time ${\tau}$ of the OPFET device is computed for dark and illumination conditions. The switching time ${\tau}$ is greatly reduced by optical illumination and is also a function of device active layer thickness and corresponding impurity flux density $Q_{Diff}$. Thus it is shown that the diffusion process shows great potential for improvement of optoelectronic devices in quantum efficiency and other performance areas.
Purpose: To report the radiographic and clinical results of 6.5 mm cancellous full threaded buttress screw or Steinmann pin fixation to maintain a reduction of calcaneal posterior facet depression fracture. Materials and Methods: From June 2009 to June 2012, 50 consecutive cases with calcaneal joint depression fracture that underwent open reduction and screw or pin fixation were enrolled in this study. A 6.5 mm cancellous full threaded screw was inserted from the posteroinferior aspect of the calcaneal tuberosity to the posterior facet (group A) or Steinman pin was inserted from the posterosuperior aspect of the calcaneal tuberosity to the calcaneocuboidal joint (group B). Both preoperative and postoperative Bohler and Gissane angles were measured radiographically, and American Orthopaedic Foot and Ankle Society (AOFAS) ankle-hindfoot scale on the final follow-up were assessed. Results: The mean age of patients was 44.1 years, and the mean follow-up period was 27.2 months. According to the Sanders classification, 28 cases were type II and 22 cases were type III. In Sanders type II, Bohler and Gissane angles improved significantly from $10.1^{\circ}$ and $126.2^{\circ}$ preoperatively to $27.2^{\circ}$ and $117.1^{\circ}$, respectively, in the immediate postoperative radiograph, and at the final follow-up, $26.6^{\circ}$ and $118.6^{\circ}$, respectively. In Sanders type III, Bohler and Gissane angles improved significantly from $5.0^{\circ}$ and $129.8^{\circ}$ to $29.9^{\circ}$ and $119.3^{\circ}$, respectively, in the immediate postoperative radiograph, and $26.9^{\circ}$ and $120.2^{\circ}$ at the final follow-up. All cases achieved bony union, and the average period until complete union was 13.3 weeks. AOFAS ankle-hindfoot scale was 82.6 in Sanders type II and 77.3 in Sanders type III at the final follow-up. Conclusion: A 6.5 mm cancellous full threaded buttress screw or Steinman pin fixation is a noninvasive treatment method with a merit of being able to maintain the bearing capacity of the posterior facet comparable to plate fixation.
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