• Korean Journal of Poultry Science
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• v.10 no.2
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• pp.123-128
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• 1983

Fifty of one day-old chicks of silky fowl were hatched at Dept. of Animal Science, Gyeongsang National University and fifty of one day-old chicks of quails were hatched at Gim Hae, Gyung Nam. This experiment was investigated at 24 hours after incubation. Twee items investigated in this experiment were the live weights, the weights of head, eye-ball, brain, heart, liver, lung, kidney, stomach, small intestine, large intestine, and yolk sac. The results obtained are summarized as follows; 1, Average weights of body, head, eye-ball brain, heart, liver, lung, kidney, stomach, small intestine, large intesine and yolk sac of the quail chicks and standard errors were 6.54${\pm}$0.02g, 1.38${\pm}$0.l3g, 0.29${\pm}$0.004g, 0.24${\pm}$0.006g, 0.08${\pm}$0.002g, 0.21${\pm}$0.005g, 0.06${\pm}$0.002g, 0.05${\pm}$0. 002g, 0.46${\pm}$0.010g, 0.24${\pm}$0.008g, 0.10${\pm}$0.004g, and 0.28${\pm}$0.0l6g, respectively. 2. Average weights of body, head, eye-ball, brain, heart, liver, lung, kidney, stomach, small intestine, large intestine, and yolk sac of the silky fowl chicks and standard errors were 26.60${\pm}$0.491g, 4.28${\pm}$0.071g, 0.64${\pm}$0.039g, 0.55${\pm}$0.025g, 0.21${\pm}$0.0l2g, 0.77${\pm}$0.030g, 0.13${\pm}$0.006g, 0.08${\pm}$0.006g, 1,53${\pm}$0.076g 0.73${\pm}$0.036g, 0.42${\pm}$0.031g, and 2.65${\pm}$0.297g, respectively. 3. The relative ratios of the organ weight versus body weight in guails were compared with those of the commercial chicks (Hibro, Hubbard, and Hisex) and silky fowls. It was noted that the relative weights of the brain and eye ball with respect to body weight were larger in case of quails (Table 3). The weights of heart, liver, lung, kidney, stomach and small intestine in silky fowl were smaller than those of commercial chicks and quail chicks. Other items were similar in weight to commercial chicks ana quail chicks.

• Journal of the Korean Society of Marine Environment & Safety
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• v.25 no.2
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• pp.244-250
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• 2019

We investigated the relationship between morphological characteristics and individual dry weight to develop a method for estimating the individual dry weight of sheet form macroalgae: Ulva australis, Ulva linza, Pachymeniopsis lanceolata, and Pyropia yezoensis. In Total, 319 thalli of various sizes were collected at six sites from February 2017 to December 2018. An interspecific allometric exponent of 0.28 was found for length-biomass allometry in four sheet form macroalgae, corresponding to a 1/4-power law for primary producers. The relationships between surface area and individual dry weight, as well as between individual fresh weight and individual dry weight, were found to fit significantly using linear regression equations. This explained 94-99 % of individual dry weight, indicating that surface area and individual fresh weight can be used to accurately estimate individual dry weight. We propose the use of this method when experimental processes do not allow individual dry weight to be measured directly, so researchers can save both time and expense.

• Food Science of Animal Resources
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• v.31 no.2
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• pp.266-272
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• 2011

The objective of this study was to investigate the current state of carcass weight distribution and external quality of domestic duck products. A total of 419,164 duck heads were used for the carcass weight distribution analysis. From the results, the average, mode, median, and quartile were 2,164.4, 2,000, 2,200, and 300 g, respectively. Furthermore, carcass yield averaged 70.1% from the live weights of domestic duck products. Duck carcasses had 28.4% external defects and 4.8% external damage. Moreover, the appearance ratio of discoloration was 34.1% and, in particular, the leg region was significantly (p<0.05) higher than that of the other regions. The feather removal defect ratio averaged 44% from the duck carcass surface. The ratio of disjointed and broken bones averaged 9.91% and mostly appeared in wing and leg parts. Fat content was significantly (p<0.05) higher in carcasses with weights >2.3 kg than that of other carcass weight levels, suggesting that market live weight of domestic duck products must be greater than a minimum of 3 kg.

• Proceedings of the ESK Conference
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• 1994.04a
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• pp.52-63
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• 1994

산업현장에서 산업재해의 주요한 요인이 되는 중량물 수운반 활동시 작업자가 안전 하게 작업을 행하면서도 최적허용중량을 결정하기위한 연구는 주어진 작업조건하에 서 인양되는 최대중량을 결정하기 위한 기준으로서 척추에 가해지는 압력을 이용하는 생체역학적 접근법, 주어진 작업조건하에서 인양되는 최대중량을 결정하기 위한 기준 으로서 에너지 소모량을 이용하는 생리학적 접근법, 주어진 작업조건하에서사람이 인 양할 수 있는 최대중량을 결정하는 기준으로서 피실험자에의해서 인지되는 힘든 정도를 이용하는 정신물리학적 접근법 등으로수행하여 왔다.

• Horticultural Science & Technology
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• v.34 no.1
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• pp.77-83
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• 2016

The measurement of total fresh weight of plants provides an essential indicator of crop growth for monitoring production. To measure fresh weight without damaging the vegetation, image-based methods have been developed, but they have limitations. In addition, the total plant fresh weight is difficult to measure directly in hydroponic cultivation systems because of the amount of nutrient solution. This study aimed to develop a real-time, precise method to measure the total fresh weight of Romaine lettuce (Lactuca sativa L. cv. Asia Heuk Romaine) with growth stage in a plant factory using a nutrient film technique. The total weight of the channel, amount of residual nutrient solution in the channel, and fresh shoot and root weights of the plants were measured every 7 days after transplanting. The initial weight of the channel during nutrient solution supply (Wi) and its weight change per second just after the nutrient solution supply stopped were also measured. When no more draining occurred, the final weight of the channel (Ws) and the amount of residual nutrient solution in the channel were measured. The time constant (${\tau}$) was calculated by considering the transient values of Wi and Ws. The relationship of Wi, Ws, ${\tau}$, and fresh weight was quantitatively analyzed. After the nutrient solution supply stopped, the change in the channel weight exponentially decreased. The nutrient solution in the channel slowly drained as the root weight in the channel increased. Large differences were observed between the actual fresh weight of the plant and the predicted value because the channel included residual nutrient solution. These differences were difficult to predict with growth stage but a model with the time constant showed the highest accuracy. The real-time fresh weight could be calculated from Wi, Ws, and ${\tau}$ with growth stage.

• KSBB Journal
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• v.10 no.1
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• pp.46-54
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• 1995

The physiological characteristics of carrot hairy roots and suspension cells were examined based on their nutritional requirements. Inorganic nutrient (phosphorous and ammonium) requirements of carrot hairy roots were similar to those of suspension cells. Optimal sucrose concentration for the growth of hairy roods (7%) was different from that of suspension cells (3%). Since suspension cells were move easily affected by the environmental condition, e.g., osmotic stress, than hairy roofs which made the suitable growth condition for cells, it can be understood that optimal sucrose concentration for the growth of hairy roots was higher than that for the growth of the suspension cells. To investigate the roles of sucrose on the growth of hairy roots, the effects of sucrose on the fresh weight and dry weight was analysed by the addition of mannitol as an osmolicum. Sucrose acts also as an energy source for hairy roots rather than as an osmotic regulator, since the increase of dry weight was higher than that of fresh weight at the given sucrose concentration.

• Journal of Animal Science and Technology
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• v.49 no.2
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• pp.203-212
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• 2007

Means measuring carcass cut traits in live pigs is needed to genetically improve the production of favorite cuts in swine. The data of body measurements as well as carcass traits were collected from 432 heads of 4 crossbred lines. Weights of most parts and percentages of belly and boston in carcass were significantly influenced by days to slaughter. Most of off test body measurements show higher correlations with carcass cut traits than body measurements of on test and market do. The multiple regression equations for estimation of carcass cut traits by off test body measurements have higher accuracy than by body measurements of on test and market. The coefficients of determination in estimation of polynomial regression with off test body measurements after adjustments of carcass cut traits for days to market were ranged 0.59 to 0.68 and 0.33 to 0.43 in weights and percentages of carcass cuts, respectively. Develop- ment of an excellent Korean type seed stock for favorite cuts can be expected, if the estimation of carcass cut traits for live animals is implemented in swine genetic improvement program.

• Proceedings of the Korean Society of Postharvest Science and Technology of Agricultural Products Conference
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• 2003.04a
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• pp.100-100
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• 2003

키토산처리가 콩나물의 성장특성에 미치는 영향을 조사하기 위하여 콩에 0.05% 키토산(493kDa, 금호화성, 한국)을 함유하는 0.05% 초산 용액 4배량을 가하여 8시간 침지한 후 2$0^{\circ}C$에서 2시간 간격으로 5일간 주수하면서 발아율, 수율, 배축과 자엽의 중량변화, 수분함량, 배축의 길이와 두께 등을 조사하였다. 발아율은 키토산처리구(88-94%)가 대조구(69-85%) 보다 높았다. 5일간 재배한 콩나물의 생체중량은 처리구(70.28 g/10 g-pot)가 대조구(63.86 g/10 g-pot) 보다 18% 높았다. 재배중의 수분함량은 대조구(59.53-73.33%) 보다 처리구(64.66-84.45%)가 5.13-11.12%가 높았다. 재배중의 자엽의 중량은 대조구(25.06-27.21 g/10 g-pot)가 처리구(23.42-25.55 g/10 g-pot) 보다 높았으며 배축의 중량은 대조구(9.27-36.25 g/10 g-pot)보다 처리구(15.19-44.73 g/10 g-pot)가 높았다. 재배중 배축의 길이와 두께는 대조구(6.51-19.87 cm)보다 처리구(7.67-22.38 cm)가 길었으며, 두께는 대조구(2.08-2.12 mm)가 처리구(203-2.08 mm)보다 약간 두꺼웠다. 이상의 결과 키토산처리는 콩나물의 발아율을 높이며, 콩나물의 수분함량이 높고, 배축의 길이가 기나 두께는 다소 가는 특성을 나타내었다.

• Korean Journal of Ecology and Environment
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• v.56 no.2
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• pp.161-171
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• 2023

The medium-large cladoceran species Simocephalus spp. predominantly occur in habitats with developed aquatic vegetation. Accordingly, due to Simocephalus' high contribution to zooplankton community biomass in the lake's littoral zone and wetland habitats, estimating their biomass is important to understand the matter cycling based on biological interactions within the aquatic food web. In this study, we reviewed the length-weight regression equations used previously to estimate Simocephalus biomass, directly measured S. serrulatus' body specification (length, width and area) and their biomass(dry weight) using instruments such as a microscopic digital camera and a microscale, and performed regression analysis between each other. When S. serrulatus biomass was estimated using the equation (Kawabata and Urabe, 1998) presented in 『Biomonitoring Survey and Assessment Manual』, Korea, errors between estimates and measures were relatively large compared to the S. serrulatus species-specific biomass estimate equation developed by Lemke and Benke (2003). In addition, both equations showed not only increasing trends in error (estimate-measure) with increasing S. serrulatus' body length, but also in error variance among similar-sized individuals. The results of regression analysis with dry weight by body specifications indicated that the most appropriate equation for estimating the biomass of S. serrulatus was derived from the width-dry weight exponential regression equation (R²=0.9555). The review and development study of such species-specific biomass estimation equations for zooplankton can be used as a tool to understand their role and function in aquatic ecosystem food webs.

• KOREAN JOURNAL OF PACKAGING SCIENCE & TECHNOLOGY
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• v.25 no.3
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• pp.101-109
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• 2019

The effect of packaging and storage methods in enhancing the shelf life and improving the postharvest quality of the Korean head cabbage (Brassica rapa) used for wrapping vegetables was studied at 10℃. The wrapping cabbage was packed using four types of packaging and storage materials: (A) Perforated PP film; (B) Non-perforated PP film; (C) PVC film for wrapping; and (D) non-packaged as control. The quality parameters, such as fresh appearance, weight loss, hue angle, moisture content, hardness, and SSC of wrapping cabbage were investigated. The weight loss of wrapping cabbage showed a significant difference between the one packaged with film and the non-packaged as control. The general appearance of Korean cabbage stored at 10℃ was not significantly affected by the packaging treatments. However, Korean head cabbage packaged with perforated film tend to show a better external appearance compared with those exposed to the other packaging during three weeks of storage at 10℃. The inside appearance, hue angle, moisture content, hardness, and SSC, gradually decreased during the storage period. No remarkable change in the measured items were observed in Korean cabbage packaging methods. In this experiment, the Korean cabbage packaged inside a PP film with holes, and stored at 10℃ temperature had the most desirable outcome of extending the head cabbage's shelf life and appearance quality. Results suggest that perforated packaging treatment combined with low storage temperature could be an effective method in prolonging the shelf life of Korean cabbage for wrapping vegetable.