다형질 Animal Model에 의한 12개월령 한국산 전복 2 아종의 성장관련형질에 대한 유전모수 추정

최미경,한석중,양상근,원승환,박철지,여인규 한국패류학회 2008 The Korean Journal of Malacology Vol.24 No.2

In other aquaculture species, large improvements in growth have been achieved through selective breeding. Ezo abalone (Haliotis discus hannai) and disk abalone (H. discus discus) are major aquatic animals cultured in Asia, but selective breeding for the promotion of growth with these abalones has not been actively pursued. Recently significant efforts are being made to promote production of these species through selective breeding in Korea. The aims of this work were to estimate the general genetic parameters, heritabilities, and genetic and phenotypic correlations on growth-related traits at 1-year old in two Korean abalone subspecies, H. discus hannai and H. discus discus, by using multiple trait animal model. The data were collected from the records of 1,504 individuals produced from 22 sires and 26 dams in H. discus hannai and 297 individuals produced from 5 sires and 6 dams in H. discus discus, which evaluated by the Genetics and Breeding Research Center, National Fisheries Research & Development Institute (NFRDI). Genetic parameters were estimated for these abalone subspecies raised in Bukjeju branch, NFRDI, from May 20, 2004 to May 16, 2005, respectively. The heritability estimates obtained from restricted maximum likelihood (REML) were higher than expected, ranging from 0.40 to 0.43 for growth traits shell length, shell width and body weight in H. discus hannai and from 0.26 to 0.51 in H. discus discus, respectively. The heritabilities for shell shape and condition factor were lower than others of growth traits such as ranging from 0.09 to 0.19 in H. discus hannai and from 0.10 to 0.23 in H. discus discus, respectively. Genetic and phenotypic were > 0.93 between shell parameters and weight in two abalone species, respectively, indicating that breeding for weight gains could be successfully achieved by selecting for shell length. In other aquaculture species, large improvements in growth have been achieved through selective breeding. Ezo abalone (Haliotis discus hannai) and disk abalone (H. discus discus) are major aquatic animals cultured in Asia, but selective breeding for the promotion of growth with these abalones has not been actively pursued. Recently significant efforts are being made to promote production of these species through selective breeding in Korea. The aims of this work were to estimate the general genetic parameters, heritabilities, and genetic and phenotypic correlations on growth-related traits at 1-year old in two Korean abalone subspecies, H. discus hannai and H. discus discus, by using multiple trait animal model. The data were collected from the records of 1,504 individuals produced from 22 sires and 26 dams in H. discus hannai and 297 individuals produced from 5 sires and 6 dams in H. discus discus, which evaluated by the Genetics and Breeding Research Center, National Fisheries Research & Development Institute (NFRDI). Genetic parameters were estimated for these abalone subspecies raised in Bukjeju branch, NFRDI, from May 20, 2004 to May 16, 2005, respectively. The heritability estimates obtained from restricted maximum likelihood (REML) were higher than expected, ranging from 0.40 to 0.43 for growth traits shell length, shell width and body weight in H. discus hannai and from 0.26 to 0.51 in H. discus discus, respectively. The heritabilities for shell shape and condition factor were lower than others of growth traits such as ranging from 0.09 to 0.19 in H. discus hannai and from 0.10 to 0.23 in H. discus discus, respectively. Genetic and phenotypic were > 0.93 between shell parameters and weight in two abalone species, respectively, indicating that breeding for weight gains could be successfully achieved by selecting for shell length.

이중 비틀림 시험을 이용한 암석의 임계하 균열성장 지수결정

고태영,J. Kemeny,문현구 한국자원공학회 2008 한국자원공학회지 Vol.45 No.6

Subcritical crack growth is an environmental-assisted crack growth. It takes place over long periods of time and its crack velocity is very slow. The characteristics of subcritical crack growth are evaluated by determining the subcritical crack growth parameters. The subcritical crack growth parameters A and n can be estimated from the experimental relation between the crack velocity and the stress intensity factor. In this research, the subcritical crack growth parameters for Coconino sandstone are determined using a double torsion test. The subcritical crack growth parameter n is determined to be 33 with standard deviation of 11, and A was determined to be 1.15×10-4 to 1.45 m/s. The parameter n values seem reasonable compared with other literature, but the parameter A values are widely scattered. Thus the double torsion test may not be suitable for determining the parameter A. The fracture toughness is also determined to be 0.686 MPa√m and this value is compared with the value from the chevron bend specimen.

Mapping the Spatial Distribution of IRG Growth Based on UAV

나상일,박찬원,김영진,이경도 한국토양비료학회 2016 한국토양비료학회지 Vol.50 No.4

Italian Ryegrass (IRG), which is known as high yielding and the highest quality winter annual forage crop, is grown in mid-south area in Korea. The objective of this study was to evaluate the use of unmanned aerial vehicle (UAV) for the monitoring IRG growth. Unmanned aerial vehicle imagery obtained from middle March to late May in Nonsan, Chungcheongnam-do. Unmanned aerial vehicle imagery corrected geometrically and atmospherically to calculate normalized difference vegetation index (NDVI). We analyzed the relationships between NDVIUAV of IRG and biophysical measurements such as plant height, fresh weight, and dry weight over an entire IRG growth period. The similar trend between NDVIUAV and growth parameters was shown. Correlation analysis between NDVIUAV and IRG growth parameters revealed that NDVIUAV was highly correlated with fresh weight (r=0.988), plant height (r=0.925), and dry weight (r=0.853). According to the relationship among growth parameters and NDVIUAV, the temporal variation of NDVIUAV was significant to interpret IRG growth. Four different regression models, such as (1) Linear regression function, (2) Linear regression through the origin, (3) Power function, and (4) Logistic function were developed to evaluate the relationship between temporal NDVIUAV and measured IRG growth parameters. The power function provided higher accurate results to predict growth parameters than linear or logistic functions using coefficient of determination. The spatial distribution map of IRG growth was in strong agreement with the field measurements in terms of geographical variation and relative numerical values when NDVIUAV was applied to power function. From these results, NDVIUAV can be used as a new tool for monitoring IRG growth.

Mapping the Spatial Distribution of IRG Growth Based on UAV

Sang-Il Na,Chan-Won Park,Young-Jin Kim,Kyung-Do Lee 한국토양비료학회 2016 한국토양비료학회지 Vol.49 No.5

Italian Ryegrass (IRG), which is known as high yielding and the highest quality winter annual forage crop, is grown in mid-south area in Korea. The objective of this study was to evaluate the use of unmanned aerial vehicle (UAV) for the monitoring IRG growth. Unmanned aerial vehicle imagery obtained from middle March to late May in Nonsan, Chungcheongnam-do. Unmanned aerial vehicle imagery corrected geometrically and atmospherically to calculate normalized difference vegetation index (NDVI). We analyzed the relationships between NDVIUAV of IRG and biophysical measurements such as plant height, fresh weight, and dry weight over an entire IRG growth period. The similar trend between NDVIUAV and growth parameters was shown. Correlation analysis between NDVIUAV and IRG growth parameters revealed that NDVIUAV was highly correlated with fresh weight (r=0.988), plant height (r=0.925), and dry weight (r=0.853). According to the relationship among growth parameters and NDVIUAV, the temporal variation of NDVIUAV was significant to interpret IRG growth. Four different regression models, such as (1) Linear regression function, (2) Linear regression through the origin, (3) Power function, and (4) Logistic function were developed to evaluate the relationship between temporal NDVIUAV and measured IRG growth parameters. The power function provided higher accurate results to predict growth parameters than linear or logistic functions using coefficient of determination. The spatial distribution map of IRG growth was in strong agreement with the field measurements in terms of geographical variation and relative numerical values when NDVIUAV was applied to power function. From these results, NDVIUAV can be used as a new tool for monitoring IRG growth.

Estimation of growth parameters of Listeria monocytogenes after sublethal heat and slightly acidic electrolyzed water (SAEW) treatment

Xuan, X.T.,Ding, T.,Li, J.,Ahn, J.H.,Zhao, Y.,Chen, S.G.,Ye, X.Q.,Liu, D.H. Butterworths ; Taylor Francis ; Elsevier Science 2017 FOOD CONTROL Vol.71 No.-

<P>Time to detection experiments (TTD) based on turbidometry using an automatic Bioscreen C is a useful and straightforward method for estimating microbial growth parameters (lag time (lambda), growth rate (mu) and 'work to be done' (h(0))) at constant temperature. This study investigated the effects of slightly acidic electrolyzed water (SAEW) and heat treatment on Listeria monocytogenes growth at different recovery temperatures (10 degrees C, 15 degrees C, 25 degrees C, and 30 degrees C). Similar surviving and sublethally injured L. monocytogenes populations were obtained by heat treatment (55 degrees C for 10 min) and SAEW treatment (available chlorine concentration of 30 mg/l and ratio of bacteria against SAEW of 8:2 for 30 s). In these experimental conditions, stresses had greater impact on the lambda and h(0) parameter in comparison with recovery temperature while there was no great change in growth rate under isothermal conditions. Larger lambda values and h(0) parameters were observed in sublethal-heat injured L. monocytogenes (the maximum lambda and h(0) parameters are 30.199 h and 1.6492) as compared to SAEW groups (the maximum lambda and h(0) parameters are 22.634 h and 1.4396). The sensitivity analysis of SAEW and heat treatments on h(0) parameter indicated that SAEW treatment showed a higher influence. The collinearity diagnostics of independent variables [recovery temperature (T), mu, lambda] for dependent variable (h(0) parameter) demonstrated that T, mu and lambda had strong collinearity. In addition, the established secondary models in this study have good performances on predicting the effect of recovery temperature on bacterial growth parameters. (C) 2016 Elsevier Ltd. All rights reserved.</P>

Effects of diet and sediment type on survival, growth and moulting of juvenile tiger crab, <i>Orithyia sinica</i> L.

Jee, Jung-Hoon,Koo, Ja-Geun,Keum, Yoo-Hwa,Kang, Joon-Suk,Park, Kwan H A,Kang, Ju-Chan Blackwell Publishing Ltd 2007 Aquaculture research Vol.38 No.1

<P>Abstract</P><P>This study investigated the effects of different types of diet and sediment on the growth parameters of juvenile tiger crab <I>Orithyia sinica</I> under laboratory conditions, focusing on survival, growth and moulting. In the first set of experiments, juvenile tiger crabs were reared with five different types of sediment, i.e., soft sand, coarse sand, soft sand mixed with coarse sand, mud or bare bottom. Soft sand resulted in not only the highest survival rate of 78% but also the best rate of growth and feed intake. Crabs reared with a mud substrate showed the worst results in these parameters. The intermoult period, however, was not affected by sediment types. In the second set of experiments, crabs were fed different types of diet to determine their effects on the same growth parameters. Diets were composed of different combinations with Manila clam (<I>Ruditapes philippinarum</I>), brine shrimp (<I>Artemia nauplii</I>), microencapsulated feeds and marine diatom (<I>Chaetoceros gracilis</I>). Survival and growth in crabs fed Manila clam as a diet component were significantly higher than in those on other diets. The highest survival and growth were achieved with a diet that included all four components. These results provide valuable information on the appropriate bottom substrates and diet types necessary for artificial mass culture of the tiger crab.</P>

Effects of Replacement of Fish Meal by Soy Protein Isolate on the Growth, Digestive Enzyme Activity and Serum Biochemical Parameters for Juvenile Amur Sturgeon (Acipenser schrenckii)

Xu, Q.Y.,Wang, C.A.,Zhao, Z.G.,Luo, L. Asian Australasian Association of Animal Productio 2012 Animal Bioscience Vol.25 No.11

An 8-wk experiment was conducted to evaluate the effect of replacing fish meal (FM) with soy protein isolate (SPI) on the growth, digestive enzyme activity and serum biochemical parameters of juvenile Amur sturgeon (Acipenser schrenckii). SPI was used to replace 0, 25, 50, 62.5, 75, 87.5, 100% of dietary FM and 100% replacement supplemented crystalline amino acid. Healthy sturgeon with an average initial weight of $26.38{\pm}0.24$ g were randomly assigned to 24 aquaria (8 treatments with triplicates each) at an initial stocking density of 11 fish per aquarium and cultured for 8 wks. The results showed that 75.00% or more substitution resulted in a poor weight gain rate, feed conversion ratio and survival rate compared to that of fish fed the control diet (p<0.05), whereas no significant differences were observed between diets of 25.00% to 62.50% substitution. Protease, lipase and amylase activity in foregut, mid-gut and hindgut were significantly (p<0.05) decreased by diets where SPI replacement levels were 62.50% or more. Levels of serum total protein (TP) and globulin decreased significantly from 21.03, 10.34 to 14.05, 5.63 g/L with the increasing dietary SPI (p<0.05), but alkaline phosphatase activity significantly increased (p<0.05). In addition, supplemental crystalline amino acid in the FM absence diet did not improve growth performance, intestine digestive enzyme activities and serum biochemical parameters. In conclusion, the results from this study showed adverse effects of inclusion of SPI in diets on growth performance, feed utilization and serum biochemical parameters in juvenile Amur sturgeon. Based on WGR and replacement ratio presented in this report, a 57.64% replacement level was recommended.

Silicon Promotes Shoot Proliferation and Shoot Growth of Salvia splendens under Salt Stress in Vitro

Prabhakaran Soundararajan,Iyyakkannu Sivanesan,조은혜,정병룡 한국원예학회 2013 Horticulture, Environment, and Biotechnology Vol.54 No.4

Silicon (Si) is known to have beneficial effects on plants especially in monocots such as rice, wheat, and sugarcane. The objective of this study was to examine the effect of Si against NaCl on axillary shoot proliferation and shoot growth of in vitro of Salvia splendens ‘Hot Jazz’, one of the important floricultural plants. In vitro study was chosen because in such controlled environment the mechanism of Si alleviation can be clearly studied without any external hindrance. Nodal explants have been cultured on the MS medium supplemented with 3.0 mg·L-16-benzylaminopurine (BAP) and 0.5 mg·L-1 indole-3-acetic acid (IAA) with or without 50 or 100 mM NaCl as the salt stress source and 50 or 100 mg·L-1 K2SiO3 as the Si source. Salt stress exhibited strong retardation on growth parameters such as number and length of shoots and internodes, chlorophyll content, and the fresh and dry weights of shoots. At 50 mM NaCl both 50 and 100 mg·L-1 K2SiO3 helped to overcome the salt effect and maximized the plant growth. Though the Si gave tolerance and increased growth even in the 100 mM NaCl treatment, it was not as much effective as in the 50 mM NaCl treatment. In conclusion, these results put forward an experimental evidence for further studies of Si on salinity stress in ornamental plants.

A Parameter Selection Model for Avascular Tumor Growth

Changyu Liu,Bin Lu,Cong Li 보안공학연구지원센터 2014 International Journal of Control and Automation Vol.7 No.12

Based on a set of reaction-diffusion equations of oxygen, glucose and growth inhibitory factor which were built to describe the tumor growth environment, a cell cycle control factor was proposed for the simulation of the avascular tumor growth. In order to fix the model parameters, a two-level heuristic searching was given for the parameter selection. Finally, a total finite element energy equation was present to combine the chemical simulation and the physical simulation for the avascular tumor growth. Experimental results showed that the presented approach outperformed the baseline approach in the simulation of the mouse mammary tumor cells EMT6/Ro.

Effect of KH-BaRoKer-SeongJangTang based on traditional medicine theory on longitudinal bone growth

김민호,정현석,박명덕,문필동 셀메드 세포교정의약학회 2014 TANG Vol.4 No.2

KH-BaRoKer-SeongJangTang (KBS) is a recently developed formulation by using traditional drugs considering traditional medical theory of Oriental books such as ShinNongBonChoGyeong and JuRye, which has been used to improve the growth of child in Korea. Although KBS is usually prescribed to many children who are in retard for their age, its pharmacological effects have not been fully understood in experimental models. The aim of this study was to evaluate the effects of KBS on bone growth. Growth plate thickness and bone parameters such as bone volume/tissue volume (BV/TV), trabecular thickness (Tb.Th), trabecular number (Tb.N), connection density (Conn.D), and total porosity were analyzed by means of microcomputed tomography. Serum insulin-like growth factor-I (IGF-I) levels were measured by enzyme-linked immunosorbent assay. Hepatic IGF-I mRNA expression was analyzed by real-time polymerase chain reaction. Phosphorylation of signal transducer and activator of transcription5 (STAT5) was investigated using Western blot analysis and immunohistochemistry. The thickness of growth plate was increased by KBS. BV/TV, Tb.Th, TbN, Conn.D, and total porosity were improved by KBS. Hepatic IGF-I mRNA and serum IGF-I levels were elevated by KBS. Phosphorylation of STAT5 was increased with administration of KBS. These results suggest that KBS would be helpful to children who are in retard for their age through the elevation of IGF-I.