• Fisheries and Aquatic Sciences
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• 제23권8호
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• pp.22.1-22.8
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• 2020

Background: High demand and low supply of fishmeal due to overexploitation of fisheries resources have resulted in a dramatic increase in the price of this ingredient. Olive flounder (Paralichthys olivaceus) commercial feed contains approximately 60% fishmeal and limited success has been achieved in identifying sustainable alternative protein sources for this species. Methods: An on-farm feeding trial was conducted to compare a basal diet containing 65% as the control (CONT) with two experimental diets replacing 10% of fishmeal by animal protein (AP₁₀) or 20% of fishmeal by animal and plant protein (APP₂₀). Sub-adult olive flounder averaging 327 ± 9.3 g (mean±SD) were fed one of the three diets in triplicate groups for 16 weeks. Results: Weight gain, specific growth rate, feed efficiency, protein efficiency ratio, and survival were not significantly different among fish fed all the experimental diets (P > 0.05). Also, non-specific immune responses (superoxide dismutase and lysozyme activity), serum biochemical parameters, and intestinal villi length were not significantly different among fish fed all the experimental diets (P > 0.05). Conclusions: Therefore, based on growth performance, non-specific immune responses, serum biochemical parameters, and intestinal histology, dietary animal and plant protein mixtures could replace up to 20% of fishmeal in the diet of sub-adult olive flounder.

• 한국식생활문화학회지
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• 제36권5호
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• pp.430-440
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• 2021

The purpose of this study was to provide basic data for future research and suggest product development and market segmentation strategies by identifying the perceptions and consumption behaviors of vegetarians in each segment of the vegetarian market. According to food consumption value, a total of three market segments were derived, and the markets were named based on their characteristics, including 'environment and animal protection', 'multiple consideration' and 'low interest'. As a result of analyzing the perception of vegetarian-based food, "environment and animal protection" and "multiple consideration" presented positive perceptions of a vegetarian food product. Conversely, the group stating low interest expressed negative perceptions of the vegetarian food product. An analysis of the requirements for development for vegetarian-based foods products (eg. aquafaba), indicated that the development requirements for all products, except cultured and processed meats, were high.?Considerable demand was observed for vegetarian menus and vegetarian restaurants. As a result of the analysis on the necessity of the elements of the vegetarian restaurant menu, the subjects that stated "multiple consideration" had significantly higher awareness of issues related to vegetarian foods than others.

• 한국토양비료학회지
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• 제33권4호
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• pp.234-241
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• 2000

현재 친환경농업을 위한 하나의 대체농법으로 인식되고 있는 유기농업실천 농가포장을 대상으로, 시설재배지 36곳, 논 10곳, 과수원 8곳을 전국에서 선발 표층토내 인산의 분포특성과 주요 화학적 특성을 조사하여 다음과 같은 결과를 얻었다. 유기농업포장의 화학성중 평균 유기물함량은 시설재배지 $44g\;kg^{-1}$, 논 $26g\;kg^{-1}$, 과수원 $39g\;kg^{-1}$으로 국내 90년대 농지내 평균 유기물 함량에 비해 높게 분포하였다. 유효인산 함량은 시설재배지 $986mg\;kg^{-1}$ 과수원 $754mg\;kg^{-1}$, 전인산은 각각 2973과 $2303mg\;kg^{-1}$으로 과량의 인산이 축적되고 있었다. 이는 유기농업실천 농가에서 질소와 인의 비율(N/Pratio)이 낮은 축분을 비옥도 관리에 주로 이용하기 때문으로 해석되었다. 시설재배지와 과수원 토양에서는 전인산(T-P)의 62~80%로 무기태 인(Inorganic-P) 형태로 존재하여 가장 높은 비율로 차지하였으며, 논토양에서는 Residual-P가 전인산의 50%로 가장 높은 비율을 차지하였다. 인산분획특성(P Fractionation)중 시설재배지와 과수원 토양내에서는 Ca-P가 약 $1,330mg\;kg^{-1}$으로 Extractable P 중 가장 높은 비율을 점하고 있었으며, 이는 두 토양의 높은 pH 영향으로 해석되었다. 반면 논토양내에서는 Fe-P가 Extractable P의 대부분을 차지하고 있어 토양의 이용특성간 분포차이가 있었다. 그리고 수용성 인산이 시설재배지 $65mg\;kg^{-1}$, 과수원 $26mg\;kg^{-1}$으로 비교적 높게 검출되었다. 결과적으로 친환경 농법으로 인식되고 있는 현재 우리의 유기농업 실천농가포장의 상당부분 인산이 과량축적되고 있으며, 이로 인한 토양환경 악화 초래 및 주변수계의 부영양화 유발가능성이 있을 것으로 예측되어 세심한 관리가 필요할 것으로 조사되었다.

• 한국작물학회:학술대회논문집
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• 한국작물학회 2006년도 Grop Science and Biotechnology in the 21st Century
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• pp.23-23
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• 2006

• 한국토양비료학회지
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• 제31권호
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• pp.90-99
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• 1998

• 동아시아식생활학회지
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• 제19권2호
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• pp.195-201
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• 2009

The antioxidative activities of two varieties of egg plant (Chunyang No 2: Dangaji, Jinju Janggaji: Janggaji) extracts were investigated. The total polyphenol contents of Dangaji peel hot water extract and the Janggaji flesh and fruit hot water extracts were higher than those of the other samples. However, the DPPH radical scavenging activities(electron donating activity) of Dangaji flesh-ethanol, peel-cold water, and fruit- ethanol extracts, as well as the Janggaji peel cold water extract, were higher than those of the other samples. Furthermore, the in vitro inhibitory effects of the Dangaji peel cold water and hot water extracts on rat hepatic xanthine oxidase were highest among the samples, and were exhibited in a dose dependant manners. Although there were marked changes in the xanthine oxidase Km values for xanthine as a substrate, the Vmax value changes by the addition of the Dangaji water extracts were minor compared with the control. This result suggests that Dangaji water extracts may regulate the activity of xanthine oxidase-via the inhibition of binding affinity between the enzyme and substrate. The present study provides experimental evidence that constituents of egg plant extracts may ameliorate reactive oxygen species(ROS)-induced oxidative stress via hepatic hepatic xanthine oxidase activity, but further studies to identify the active antioxidants and compounds and inhibitors of xanthine oxidase are required.

• 한국식품영양학회지
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• 제30권1호
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• pp.156-165
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• 2017

This study investigated the chemical composition of Petasites japonicus (S. et Z.) Maxim essential oil. During the period 2011~2013, P. japonicus (S. et Z.) Maxim plant was investigated for composition of the essential oil. Chemical composition and characteristic compounds of the essential oils from the aerial parts of the plant according to the crop year studied. The essential oils consisted of sesquiterpene compounds, which were the most abundant components. Samples collected in 2011 were found to be richer in oxygenated sesquiterpenes, while samples collected in 2012 and 2013 were richer in diterpene alcohols and sesquiterpene hydrocarbons, respectively. Ninety-two compounds were identified in the P. japonicus (S. et Z.) Maxim essential oil of 2011, and caryophyllene oxide (20.49%), ${\beta}$-caryophyllene (10.28%), ${\beta}$-bisabolene (6.80%), and alloaromadendrene (6.50%) were the major compounds. Seventy-four compounds were identified in the plant essential oil of 2012, and phytol (17.22%), ${\alpha}$-farnesene (15.31%), ${\alpha}$-caryophyllene (9.93%), and ${\beta}$-caryophyllene (6.12%) were the major compounds. Ninety-two compounds were identified in the plant essential oil of 2013, and ${\alpha}$-farnesene (22.42%), ${\alpha}$-caryophyllene (21.49%), pentadecane (15.35%), and germacrene (5.70%) were the major compounds. The content of most of the chemical constituents varied significantly with different harvesting time. The content of ${\alpha}$-caryophyllene and caryophyllene oxide was increased significantly from 2011 to 2013. The content of ${\alpha}$-caryophyllene and isocaryophyllene was decreased significantly from 2011 to 2013.

• 한국식품영양학회지
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• 제28권4호
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• pp.533-543
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• 2015

This study investigated the chemical composition of Artemisia princeps var. orientalis (Pampan) Hara (ssuk in Korea) essential oil and the quantitative changes of major terpene compounds according to the time of harvest. The essential oils obtained by hydrodistillation extraction from the aerial parts of ssuk were analyzed by GC and GC-MS. The essential oil composition of ssuk was characterized by higher contents of mono- and sesqui- terpene compounds. Ninety-nine volatile flavor compounds were identified in the essential oil from ssuk harvested in 2010, with camphor (11.9%), ${\beta}-caryophyllene$ (9.11%), dehydrocarveol (8.51%), and borneol (7.72%) being the most abundant compounds. Eighty-three compounds were identified in the essential oil from the plant harvested in 2011, with borneol (12.36%), caryophyllene oxide (12.29%), ${\beta}-caryophyllene$ (10.24%), camphor (9.13%), and thujone (8.4%) being the most abundant compounds. Eighty-four compounds were identified in the essential oil from the plant harvested in 2012, with ${\beta}-caryophyllene$ (20.25%), caryophyllene oxide (14.63%), and thujone (11.55%) being the major compounds. Eighty-nine compounds were identified in the essential oil from the plant harvested in 2013, with thujone (23.11%), alloaromadendrene oxide (12.3%), and ${\beta}-caryophyllene$ (11.48%) being the most abundant compounds. Thujone and aromadendrene oxide contents increased significantly from 2010 to 2013, while camphor and dehydrocarveol contents decreased significantly during those 4 years. The quantitative changes in these 4 compounds according to the time of harvest can served as a quality index for ssuk essential oil. The ecological responses to recent climate changes may be reflected in the chemical components of natural plant essential oils.

• 식품과학과 산업
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• 제51권3호
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• pp.245-258
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• 2018

Natural and synthetic antibacterial materials are used in foods to avoid bacterial contamination-induced food poison and deterioration. Due to the human and environmental safety, natural products including plant extracts have been extensively added into foods as antibacterial materials. Since some of core molecules comprised in those plant extracts are hardly dissolved in aqueous phases or food matrixes, nanotechnological approaches have been suggested to overcome such obstacles. Here we report domestic and international various types of plant- or non-plant-origin antibacterial materials that have been commercialized and used for the food industry. To improve solubility and stability of such antibacterial materials, nano-encapsulation or nano-complexation methods are also investigated focusing on the utilization of dextrins and proteins as coating materials.

• 한국식생활문화학회지
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• 제37권5호
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• pp.438-445
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• 2022

Laminaria japonica is a type of brown algae widely consumed in Asian countries and contains many essential nutrients and exhibits anti-obesity, antioxidant, and anti-inflammatory effects. In this study, the antioxidant and immunomodulatory effects of a Laminaria japonica water extract (LJE) were investigated using an in vitro model. Mean total polyphenol content of LJE was 2.16±0.11 ㎍ GAE/mg, and LJE dose-dependently inhibited ABTS radical activity but did not scavenge DPPH radicals. In addition, LJE enhanced nitric oxide (NO) production and upregulated the mRNA expressions of proinflammatory cytokines (i.e., tumor necrosis factor-α and interleukin-6) in RAW 264.7 cells. On the other hand, LJE inhibited NO production and downregulated proinflammatory cytokine mRNA levels in endotoxin-stimulated RAW 264.7 cells. Thus, our data show that LJE has moderate antioxidant activity and biphasic immunomodulatory effects on RAW 264.7 cells. In summary, the study indicates that LJE has potential therapeutic use as a novel biphasic immuno-modulator.