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        검색결과 10

        1.
        2023.12 KCI 등재후보 구독 인증기관 무료, 개인회원 유료
        In this review, the regulatory mechanisms of autophagy were described, and its interaction with apoptosis was identified. The role of autophagy in embryogenesis, tooth development, and cell differentiation were also investigated. Autophagy is regulated by various autophagy-related genes and those related to stress response. Highly active autophagy occurrences have been reported during cell differentiation before implantation after fertilization. Autophagy is involved in energy generation and supplies nutrients during early birth, essential to compensate for their deficient supply from the placenta. The contribution of autophagy during tooth development, such as the shape of the crown and root formation, ivory, and homeostasis in cells, was also observed. Genes control autophagy, and studying the role of autophagy in cell differentiation and development was useful for understanding human aging, illness, and health. In the future, the role of specific mechanisms in the development and differentiation of autophagy may increase the understanding of the pathological mechanisms of disease and development processes and is expected to reduce the treatment of various diseases by modulating the autophagic phenomenon.
        4,300원
        5.
        2022.12 KCI 등재 서비스 종료(열람 제한)
        The present study aimed to examine the effect of dietary Ptecticu tenebrifer powder mixtures as pet dogfeed ingredients on crude fat and ash digestibility. Three groups of feeds Feed A, Feed B, and Feed C supplied from three farms were fed to a total of 45 dogs. The dietary Ptecticu tenebrifer powder mixture were prepared by mixing 25 g of Ptecticu tenebrifer powder with 100 g of canned food. Feed A, Feed B, and Feed C containing dietary Ptecticu tenebrifer powder mixtures were fed to 15 dogs of each breed of bichon, poodle, and chihuahua that were divided into three groups following a completely randomized design. For measuring the crude fat and crude ash digestibility, manure of each dog breed from each group were collected. Crude fat digestibility was not statistically significant among the dog breeds fed with feed C (p>0.05), but overall there was a statistical difference between the feed and the group by dog breed (p<0.05). In terms of crude ash digestibility, the three types of feed showed differences with respect to dog breeds (p<0.05). However, the group with no significant difference was observed in Feed B by dog breed (p>0.05). In conclusion, feeding Ptecticu tenebrifer powder mixture to dog breeds had no positive effect on the crude fat and ash digestibility and can be used as pet dogfeed ingredients.
        6.
        2022.12 KCI 등재 서비스 종료(열람 제한)
        This study was conducted to evaluate the effects of sipjeondaebo-tang by-product powder on the growth performance of broilers. A total of 120 broiler chicks (Arbor acres) at 0 days old were assigned to one of two treatments with three replications: control and 1% sipjeondaebo-tang by-product powder. Weight gain at 3 weeks and feed intake at 5 weeks were significantly (p<0.05) influenced by the sipjeondaebo-tang by-product powder treatments. However, there were no significant differences in the feed conversion ratio between treatments as a function of treatment time (p>0.05). Overall, weight gain and the feed conversion ratio were slightly greater for the sipjeondaebo-tang by-product powder treatment than the control treatment. It was concluded that sipjeondaebo-tang by-product powder may be an appropriate source of feed additive, without any negative effects on the growth performance of the broilers.
        7.
        2022.03 KCI 등재 서비스 종료(열람 제한)
        This study investigated the effects of dietary Ptecticu tenebrifer powder and canned mixtures on protein digestibility by different breeds of companion dogs (15 Bichons, 15 Malteses, 15 Chihuahuas and 15 Poodles). The mixtures were divided into Diet A, Diet B, Diet C, Diet D, and Diet E, which were supplied from five farms. Twenty-five grams each was mixed with 100 g of each canned food, and a total of 125 g was measured for each breed of dog. The result of component analysis of the mixtures showed the highest protein contents rather than dry matter, crude ash or crude fat. There were statistical significances (p<0.05) in all mixed feeds fed to bichon, maltese, chihuahua and poodle dog. Overall, protein digestibility by the breeds of dog ranged from 87.44% to 97.18%. Result of breed of dog comparison revealed that Diet E by poodle dog had the highest protein digestibility, and the lowest protein digestibility was observed in Diet C by Maltese. In conclusion, the use of dietary Ptecticu tenebrifer powder and canned mixtures did not only increased protein digestibility by different breeds of dog but also maintained normal manure properties.
        8.
        2021.05 KCI 등재 서비스 종료(열람 제한)
        The present study evaluated the blood profile and meat color of ducks with Houttuynia cordata (H. cordata) pellets in their diets. In total, 120 pekin ducks (1-d-old) were used in a 42 d growth trial. Ducks were randomly allocated to six pens and exposed to three replicates of two treatments: (1) controls as basal diet and (2) basal diet + 2% H. cordata pellets (T1). Total-cholesterol, HDL-cholesterol, triglyceride contents or L* and b* vaules revealed significant difference (p>0.05) in compared with those in the controls; however, dietary supplementation of H. cordata pellets did not affect (p>0.05) LDL-cholesterol, VLDL-cholesterol and a* values. In conclusion, the inclusion of 2% H. cordata pellets improved HDL-cholesterol and meat color in duck breast and thigh meats, which further reduced other cholesterol values.
        9.
        2016.12 KCI 등재 서비스 종료(열람 제한)
        Converting biomass to biocrude oil has been extensively studied worldwide as a renewable energy technology and a solution to global warming caused by overuse of fossil fuels because it is a carbon neutral fuel that originates from biomass and, thus, could help prevent climate change. Fast pyrolysis is an effective technology for producing biocrude-oil, and woody biomass is usually used as feedstock. Although many studies have been performed with this feedstock, high production cost and low higher heating value (HHV) have frequently reported as challenging barriers to commercialization. Thus, coffee ground residue was selected as an alternative feedstock to overcome this barrier due to its higher HHV than other biomasses, as well as an expected improvement in the recycling rate of organic waste from many coffee shops. A kinetic study on the thermal decomposition reaction of ground coffee residue was carried out previously to investigate pyrolysis characteristics by thermogravimetric analysis, and its kinetic parameters were studied using two calculation models. A bubbling-fluidized-bed reactor was used for fast pyrolysis and the yield and characteristics of the biocrudeoil from ground coffee residue were investigated at reaction temperatures of 400-600°C. The activation energy of the decomposition reaction was calculated separately to be 41.57 kJ/mol and 44.01-350.20 kJ/mol with the above two methods. The highest biocrude-oil content was about 51.7wt% at 550°C.
        10.
        2012.09 KCI 등재 서비스 종료(열람 제한)
        Generally an urban freeway means a primary arterial which provides road users with a free-flow speed, except for ramp junctions during rush hours. However, most road users suffer from traffic congestion in the basic segments as well as in the ramp junctions of urban freeway during rush hours, because most road users prefer urban freeways to local roads in the urban areas. This study then intends to analyze lane traffic characteristics of urban freeway basic segments having more freight vehicles during rush hours, find the lane showing a high correlation with the segment speed between lane speeds, and finally suggest a segment-speed predictive model by the lane speed of urban freeway basic segments during rush hours.