• Journal of Korean Home Economics Education Association
• /
• v.19 no.4
• /
• pp.175-185
• /
• 2007

The purpose of this study was to analyze the nutritional adequacy of one-dish meals in the middle and high school technology & Home Economics textbooks cooking practice units. Total of 27 technology & Home Economics textbooks(9 books published by 9 different publishers each for grade 7, 9, and 10) were examined. The total number of one-dish meals introduced in the textbooks was 27, remarkably low, and there are only 7 Korean one-dish meals. It was found that most one-dish meals failed to meet 1/3 of daily estimated energy requirement. According to the analysis of energy contribution ratio by carbohydrate, protein, and fats in one-dish meals, only 4 Korean foods, such as Yubuchobab, Bibimbab, Deokguk and Guksujangguk showed ideal energy contribution ratio. Among the foreign foods, there was no one-dish meal with ideal energy contribution ratio. According to the index of nutritional quality(INQ) analysis, there was no such one-dish meal which supply all the essential nutrients in adequate amounts. All one-dish meals introduced in the textbooks contained excessive protein, but almost no vitamin $B_1$ and $B_2$. Ca and Fe, likely insufficient in Korean people, was found to be a nutrient insufficient also in most one-dish meals.

• Korean Journal of Environment and Ecology
• /
• v.30 no.5
• /
• pp.803-809
• /
• 2016

In order to elucidate the ecological responses of B. latissimum under global warming situation and prepare the conservation measures, we cultivated the plant within control(ambient $CO_2+$ambient temperature) and treatment(elevated $CO_2+$elevated temperature) from 2010 to 2011. Rising $CO_2$ concentration was treated with 2 times and temperature increased with $2.0^{\circ}C$ above than control. As a result, Growth response has received more the effect of $CO_2+$Temperature rising than light, moisture, nutrients, and it was grow well in $CO_2+$temperature rise sphere when many nutrients, and it was grow well in $CO_2+$temperature rise sphere when many nutrients. No. of leaves were many number in the treated group compared to the control at a low light gradient and high nutrient gradient, leaf width was narrow in the treatment compared to the control in the middle gradient of light and nutrients. Shoot length, petiole length, lamina length was no difference between control and $CO_2+$temperature rise sphere. Based on the results of this study, in order to preserve the B. latissimum in future climate, we should be supply of nutrients(containing ${NH_4}^+$, $NO_3$, $P_2O_5$, $K_2O$, etc.) in the habitat of the B. latissimum, and must ensure that the habitat of B. latissimum is not destroyed. Also, We should be find similar area with habitat of the B. latissimum, restoring, expanding.

• Journal of Bio-Environment Control
• /
• v.21 no.4
• /
• pp.485-490
• /
• 2012

This study was carried out to investigate the plant growth of various foliage plants affected by the amount of nitrogen application. There was not an accurate criterion for fertilization to each foliage plant. Moreover, the foliage plants grow slowly during the early stage and this period must be shortened for commercial production. Ficus benjamina, Hedera helix, Philodendron tatei, Rhapis excelsa, and Spathiphyllum spp. were used in this experiment. Nutrient nitrogen concentrations were 120, 150, 180, and $210mg{\cdot}L^{-1}$ (N1, N2, N3, N4) and they were based on the Sonneveld solution. Plant height and width, leaf number, leaf area, fresh and dry weights of shoots were measured for 8 weeks to compare the responses to the different treatments. The nitrogen contents of various plant parts were also analyzed. The growth of Ficus and Hedera was improved at the N1 treatment and that of Philodendron, Rhapis and Spathiphyllum at N4 treatment. The required amounts for nitrogen nutrients were different among the various foliage plants. The nitrogen treatments had no effects on SPAD values and there were no correlations between nitrogen treatments and nitrogen contents of plant parts. Therefore, the various foliage plants should supply with each proper nitrogen treatments to grow faster with better quality. In this case, the plant growth played a more important role than nitrogen levels of plant parts in deciding the proper nitrogen levels for each foliage plant.

• Molecules and Cells
• /
• v.38 no.1
• /
• pp.40-50
• /
• 2015

In the interaction between plants and pathogens, carbon (C) resources provide energy and C skeletons to maintain, among many functions, the plant immune system. However, variations in C availability on pathogen associated molecular pattern (PAMP) triggered immunity (PTI) have not been systematically examined. Here, three types of starch mutants with enhanced susceptibility to Pseudomonas syringae pv. tomato DC3000 hrcC were examined for PTI. In a dark period-dependent manner, the mutants showed compromised induction of a PTI marker, and callose accumulation in response to the bacterial PAMP flagellin, flg22. In combination with weakened PTI responses in wild type by inhibition of the TCA cycle, the experiments determined the necessity of C-derived energy in establishing PTI. Global gene expression analyses identified flg22 responsive genes displaying C supply-dependent patterns. Nutrient recycling-related genes were regulated similarly by C-limitation and flg22, indicating re-arrangements of expression programs to redirect resources that establish or strengthen PTI. Ethylene and NAC transcription factors appear to play roles in these processes. Under C-limitation, PTI appears compromised based on suppression of genes required for continued biosynthetic capacity and defenses through flg22. Our results provide a foundation for the intuitive perception of the interplay between plant nutrition status and pathogen defense.

• Journal of agriculture & life science
• /
• v.44 no.5
• /
• pp.129-135
• /
• 2010

This experiment was carried out to commercialize an irrigation control system by finding out problems and solving them in application of a nutrient supply system through this experiment. Its efficiency had been tested through hydroponic cultivation of tomato and cucumber using this system in the farmer's plastic house (1-2W, 20a : Yanggyo-ri, Oseong-myeon Gyeonggi-do) from November. 2006, too. In the first cultivation, tomato seeds (cultivar Coco, Takii Seed Co. Japan) were sowed on November 8, 2006, and transplanted on January 8, 2007. and then, in the second, cucumber (Chuichong, Nongwoo Seed Co.) were cultivated in the same plastic house (sowing date : June 27, transplanting date : July 13). In the third, another cucumber cultivar (Jo-woon, Dongbu-hannong Seed Co.) were cultivated (sowing date : September 5, transplanting date : September 23). All of seedlings were transplanted on perlite bag ($W340{\times}L1,200{\times}H150mm$, 40L). By using this system, 971 boxes (5 kg/box) of tomato were produced and sold, and then total income was 5,466 thousand won per 10a. On the second cultivation, total amount of cucumber production was 489 boxes (50 ea/box), and total income was 7,380 thousand won. On the third cultivation, total amount of production was 67 boxes (100 ea/box), and total income was 1,854 thousand won. On the other hand, this system saved irrigated water by 50% ($4,000{\rightarrow}2,000L/10a/day$) in tomato cultivation, and by 44%($4,500{\rightarrow}2,500L/10a/day$) in cucumber cultivation. It also saved cost of nutrients by 50% in tomato ($1,648{\rightarrow}824thousand\;won/10a$), and 44% in cucumber ($1,648{\rightarrow}725thousand\;won/10a$). Furthermore this irrigation system maintained moisture content in perlite bag stable during cultivation period. Therefore, this system was successfully applied on farmer's greenhouse without a problem and can be commercialized for farmers.

• Animal Bioscience
• /
• v.36 no.2
• /
• pp.256-263
• /
• 2023

Objective: Feed molecular structures can affect its availability to gastrointestinal enzymes which impact its digestibility and absorption. The molecular spectroscopy-attenuated total reflectance Fourier transform infrared vibrational spectroscopy (ATR-FTIR) is an advanced technique that measures the absorbance of chemical functional groups on the infrared region so that we can identify and quantify molecules and functional groups in a feed. The program aimed to reveal the association of intrinsic molecular structure with nutrient supply to animals from canola feedstocks and co-products from bio-oil processing. The objective of this study was to characterize special intrinsic carbohydrate and protein-related molecular structure spectral profiles of feedstock and co-products (meal and pellets) from bio-oil processing from two source origins: Canada (CA) and China (CH). Methods: The samples of feedstock and co-products were obtained from five different companies in each country arranged by the Canola Council of Canada (CCC). The molecular structure spectral features were analyzed using advanced vibrational molecular spectroscopy-ATR-FTIR. The spectral features that accessed included: i) protein-related spectral features (Amide I, Amide II, α-helix, β-sheet, and their spectral intensity ratios), ii) carbohydrate-related spectral features (TC1, TC2, TC3, TC4, CEC, STC1, STC2, STC3, STC4, TC, and their spectral intensity ratios). Results: The results showed that significant differences were observed on all vibrationally spectral features related to total carbohydrates, structural carbohydrates, and cellulosic compounds (p<0.05), except spectral features of TC2 and STC1 (p>0.05) of co-products, where CH meals presented higher peaks of these structures than CA. Similarly, it was for the carbohydrate-related molecular structure of canola seeds where the difference between CA and CH occurred except for STC3 height, CEC and STC areas (p>0.05). The protein-related molecular structures were similar for the canola seeds from both countries. However, CH meals presented higher peaks of amide I, α-helix, and β-sheet heights, α-helix:β-sheet ratio, total amide and amide I areas (p<0.05). Conclusion: The principal component analysis was able to explain over 90% of the variabilities in the carbohydrate and protein structures although it was not able to separate the samples from the two countries, indicating feedstock and coproducts interrelationship between CH and CA.

• Ocean and Polar Research
• /
• v.45 no.3
• /
• pp.141-153
• /
• 2023

Biological pump processes generated by diatom production in the surface water of the Southern Ocean play an important role in exchanging CO₂ gas between the atmosphere and ocean. In this study, the biogenic opal content of the sediments was measured to elucidate the variation in the primary production of diatoms in the surface water of the Southern Ocean since the last glacial period. A piston core (COR-1bPC) was collected from the Conrad Rise, which is located in the Indian sector of the Southern Ocean. The sediments were mainly composed of siliceous ooze, and sediment lightness increased and magnetic susceptibility decreased in an upward direction. The biogenic opal content was low (38.9%) during the last glacial period and high (73.4%) during the Holocene, showing a similar variation to that of Antarctic ice core ΔT and CO₂ concentration. In addition, the variation of biogenic opal content in core COR-1bPC is consistent with previous results reported in the Antarctic Zone, south of the Antarctic Polar Front, in the Southern Ocean. The glacial-interglacial biogenic opal production was influenced by the extent of sea ice coverage and degree of water column stability. During the last glacial period, the diatom production was reduced due to the penetration of light being limited in the euphotic zone by the extended sea ice coverage caused by the lowered seawater temperature. In addition, the formation of a strong thermocline in more extensive areas of sea ice coverage led to stronger water column stability, resulting in reduced diatom production due to the reduction in the supply of nutrient-rich subsurface water caused by a decrease in upwelling intensity. Under such environmental circumstances, diatom productivity decreased in the Antarctic Zone during the last glacial period, but the biogenic opal content increased rapidly under warming conditions with the onset of deglaciation.

• Smart Media Journal
• /
• v.11 no.7
• /
• pp.76-84
• /
• 2022

In Korea, where rice is the staple food, there are many cases in which the nutritional composition of food is different at the same weight, even though the same ingredients are used and the food or food name is the same. The cause is closely related to the moisture content of the food according to the cooking method and cooking process. In order to design a diet tailored to individual health and supply accurate calories and nutrients, a method of expressing food data that is not affected by the cooking process or cooking method is required. Usually, the same ingredients or foods show a lot of deviation from the nutritional components presented in the standard food database due to the difference in moisture content. For this reason, there are problems that increase the complexity of the food ingredient database and the difficulty in using it. As a method to improve these problems, we would like to propose a food data expression method based on dry weight. As an example of this, the characteristics of rice as a food material and changes in major nutritional components according to the change in moisture of various rice-processed foods made from rice were considered. In addition, as an example of how to normalize food data through this, the dry weight-based nutrition label of rice was presented.

• Journal of the Korean Society of International Agriculture
• /
• v.23 no.5
• /
• pp.497-502
• /
• 2011

Broccoli is considered as one of the functional foods to offer a hearty supply of the nutrient-rich vegetable in the world. Broccoli contains high level of phytochemicals, and that is selected as one of the top 10 vegetables for human health promotion. Especially, glucosinolates and flavonoids are well known as anti free oxygen radicals in vegetables and fruits. In Korea, broccoli consumption has increased to well known on the health-beneficial vegetables since 2000. However, broccoli has many problems of postharvest management since the quality of harvested heads quickly declines. Major problems are the floret yellowing, wilting, off-odor, and decay. The multiple postharvest applications improve broccoli quality and cold treatment including pre-cooling extends on the shelf-life with circumstance of optimum storage which is 0℃ temperature and a range of 95-100% relative humidity. Controlled atmosphere or modified atmosphere packaging can be used as supplemental treatments to extend postharvest life. 1-2% O₂ + 5-10% CO₂ is currently recommended for broccoli. Postharvest management is important for broccoli because price fluctuations depend on harvest time and quality. In this study, we tried to review physiological change of broccoli after the harvest, storage method, and various techniques to optimize quality during distribution.

• Korean Journal of Environmental Agriculture
• /
• v.32 no.1
• /
• pp.9-16
• /
• 2013

BACKGROUND: Eutrophication occurs occasionally in reservoirs around lake in summer and early autumn. Lakeside macrophyte which is one of internal pollutants effects on water quality when it is submerged during rainy season. To improve water quality of water supply source in Boknae reservoir around Juam lake, characteristics of nutrient(N, P) uptake and release by submerged plants were investigated. METHODS AND RESULTS: In order to establish the management plan of submerged plants in Boknae reservoir around Juam lake, water level, rainfall, flooding and non-flooding areas, biomass of dominant plants, contents of nitrogen and phosphorus were investigated during 7 months(August, 2010 through February, 2011). Dominant plants were Miscanthus sacchariflorus(MISSA) and Carex dimorpholepis(CRXDM) in Boknae reservoir. Total plant area of Boknae reservoir in August, 2010 was 987,872 $m^2$. In Boknae reservoir, flooding occurred from August until February caused by rainfall during rainy season. The total amounts of nitrogen and phosphorus uptakes by MISSA were 247 and 22 kg/total reservoir area, respectively. By CRXDM, the total amounts of nitrogen and phosphorus uptakes were 11,340 and 1,231 kg/total reservoir area, respectively. The total amounts of nitrogen and phosphorus residues by MISSA were 34 and 11 kg/total reservoir area, respectively. By CRXDM, the total amounts of nitrogen and phosphorus residues were 491 and 68 kg/total reservoir area, respectively. CONCLUSION(S): Total amounts of nitrogen and phosphorus releases in Boknae reservoir were 12,212 and 1,324 kg/total reservoir area, respectively. The results demonstrate that total nitrogen and total phosphorus in water were strongly influenced by submerged plants. Therefore, management plan for submerged plants during rainy season will be needed to improve water quality of water supply source in Boknae reservoir around Juam lake.