• Asian-Australasian Journal of Animal Sciences
• /
• v.12 no.8
• /
• pp.1298-1309
• /
• 1999

The nutritional value of protein varies between feedstuffs. It is possible to feed animals using crystalline amino acids as a sole nitrogen source, but in practice only some limiting amino acids are added to the diet. In order to use feedstuffs efficiently, it is important to determine exact amino acid requirements. Reported values differ widely because the requirements are affected by various factors. In this report, therefore, the factors affecting amino acid requirements are reviewed as follows: 1) availability of dietary amino acids, conversion factors of nitrogen to protein, interaction of amino acids, and strain, sex and age of animals; 2) amino acid requirements for maximum performance and maintenance, usefulness of non-essential amino acids; 3) plasma amino acid concentration as a parameter to determine amino acid requirements; and 4) nitrogen excretion to reduce environmental pollution. These factors should be considered, it is to improve the dietary efficiency, which is to reduce excess nitrogen excretion for environmental pollution.

• 전기의세계
• /
• v.24 no.6
• /
• pp.77-84
• /
• 1975

This paper treats A.C. arc movement in a transverse A.C. magnetic field at atmospheric pressure with the purpose of selecting electrode materials and obtaining detailed data for design of A.C. air circuit breaker, plasma accelerator and plasma jet. Arc velocities in transverse magnetic field are measured by varying arc current, arc voltage, gap length, magnetic flux density and the erosion of electrode surface, which influence arc velocities. The main results are; 1)Arc velocities in transverse magnetic field have different values according to electrodes of various materials and decrease in a descending order of cold cathode, medium cathode and hot cathode. 2)Arc velocities in transverse magnetic field increases with arc current, arc voltage, gap length and magnetic flux densith and on the other hand decrease with the increase of electrode surface erosion. 3)D.C.arc velocity in D.C. magnetic field is higher than A.C. arc velocity in A.C. magnetic field of the same value.

• Journal of the Semiconductor & Display Technology
• /
• v.5 no.2 s.15
• /
• pp.7-10
• /
• 2006

The detailed studies regarding to the front and rear panel geometries of plasma display were needed to improve the luminance and efficiency. In plasma displays, 3-dimensional optical code can be used to analyze the variation of geometries and the changing of optical properties. The visible light distributions and illuminance were simulated depending on bus electrode position, ITO geometries, and alteration of dielectric layer's properties. This paper is concerned with development of a cell having high luminance and high efficiency for optical simulation. And the result of values could be expected to the application of real POP cell.

• Proceedings of the KIEE Conference
• /
• 1989.11a
• /
• pp.94-97
• /
• 1989

It is shown that fundamental plasma characteristic, which are sheath voltage and ion concentration, can be derived from measuring RF impedence. Plasma characteristics from this simple method are verified by direct measuring, to be reasonable. Using these values a new relation between isotropy and the ratio of sheath voltage to ion concentration is derived. For etch in which $CF_4$ is used, anisotropic etch can be achieved in its order $10^{-12}Vcm^3$ and isotropic etch in $10^{-12}Vcm^3$. These results are useful in every asymetric diode type etch system.

• Herbal Formula Science
• /
• v.11 no.1
• /
• pp.151-159
• /
• 2003

Effects of siho(Bupleuri Radix) extracts on lipid composition and antioxidant system were investigated in rat fed high fat diet. body weight gain, concentration of plasma triglyceride, total cholesterol, LDL-cholesterol showed a tendency to decrease in siho(Bupleuri Radix) extracts groups. However, the concentration of HDL-cholesterol showed no significantly different among treatments. Plasma and liver TBARS concentration showed a low values in siho(Bupleuri Radix) extracts groups. Activities of SOD, GSH-Px and CAT showed a tendency to increase in siho(Bupleuri Radix) extracts groups.

• The Korea Journal of Herbology
• /
• v.20 no.2
• /
• pp.69-75
• /
• 2005

Objective : Effects of Gamibangpungtongseungsan on lipid composition and antioxidant system were investigated in rat fed high fat diet. Methods : We fed control group rats high fat diet and administered normal saline for 8 weeks, and experimental group rats high fat diet and administered extract of Gamibangpungtongseungsan for 8 weeks. Results : Body weight gain, concentration of plasma triglyceride, total cholesterol, LDL-cholesterol showed a tendency to decrease in Gamibangpungtongseungsan groups. However, the concentration of LDL-cholesterol showed a tendency to increase in Gamibangpungtongseungsan groups. Plasma and liver TBARS concentration showed a low values in Gamibangpungtongseungsan groups. Activities of SOD, GSH-Px and CAT showed a tendency to increase in Gamibangpungtongseungsan groups. Conclusions : These results indicate that Gamibangpungtongseungsan has a deep inhibitory effect on lipid composition and antioxidant system.

• Asian-Australasian Journal of Animal Sciences
• /
• v.4 no.1
• /
• pp.1-5
• /
• 1991

Responsiveness of the testis to pregnant mare's serum gonadotropin (PMSG) was studied in immature Nili-Ravi buffalo bulls. Four month old bull calves weighing between 66 to 100 kg raised under uniform condition, were treated with 1000 IU PMSG or vehicle, daily, for six days. PMSG induced an increase in the size of the testis, enlargement of the seminiferous tubules and activation of the spermatogonia. The number of differentiated Leydig cells in the testis of gonadotropin treated animals increased considerably over that of the control testes. A significant increase in plasma testosterone concentrations was observed 24 h following the first injection of PMSG and the levels continued to increase until day 6. In vehicle treated animals plasma testosterone levels remained more or less at pretreatment values. The data suggest that buffalo bull testis is functionally responsive to gonadotropin at an early stage of prepubertal development.

• 한국정보디스플레이학회:학술대회논문집
• /
• 2000.01a
• /
• pp.63-64
• /
• 2000

The low-temperature Si oxidation kinetics by inductively coupled oxygen plasma has been studied. Linear rate constants had negative values when the oxide growth rate was described by linear-parabolic growth law. The analysis of transverse-optical mode frequencies and etch rates indicated that the density of surface oxide was lower than that of bulk oxide. The oxidation kinetics could be explained qualitatively by assuming a surface layer with larger diffusion coefficient and a bulk layer with smaller diffusion coefficient.

• Proceedings of the KIEE Conference
• /
• 1987.11a
• /
• pp.283-285
• /
• 1987

Transient conduction current (I - t characteristics) were measured in thin PPMMA (plasma-polymerized methyl methacrylate) films over the temperature range $60^{\circ}C-140^{\circ}C$ and the applied voltage range 3V - 30V. The current, which increased with temperature rise at constant applied voltage, showed less absorption current (current decay with time) at higher temperature region compared with those at lower temperature region. And the current, which increased with applied voltage rise at the constant temperature, showed less absorption current at higher voltage compared with those at lower voltage. The electric field current density characteristic curves were abtained from the conduction current values were after applying voltage for 30 minutes. And transient conduction currents were analyzed with high field conduction theories.

• Journal of the Semiconductor & Display Technology
• /
• v.4 no.3 s.12
• /
• pp.1-4
• /
• 2005

Silicon oxynitride films were deposited using ammonia as a nitrogen source via PECVD (plasma enhanced chemical vapor deposition) to study the physical properties of the films. Silane and nitrous oxide were used as silicon and oxygen sources, respectively. The composition of the silicon oxynitride films was well controlled by changing the ratios of the sources and confirmed by XPS. The silicon oxynitride films with high oxygen content showed bigger compressive stress and less refractive index, while the values of surface roughness were around 1 nm, irrespective of the variation of the source ratios.