Abstract
Bioethanol is one of the alternative sources of oil resources which received attention with biodiesel. Many countries produce bioethanol from food sources such as corn and sugarcane, but it causes food-energy conflicts and farmland problem. So it needs to focus on new biomass which is sustainable, renewable, cost-effective and do not occurred any conflicts. Algae are one of the bioma
Ⅰ. 개요
우리나라의 경우 공식통계를 담당하고 있는 통계조사인력은 4,809명으로 나타나고 있다. 이중 통계청에는 1,671명으로 통계작성기관 중 가장 많은 인력이 있으며, 그 다음으로는 농림부가 1,252명의 통계인력을 보유하고 있다. 반면 나머지 23개 중앙부처에는 총 416명의 통계인력으로 평균 18.1명
Various microorganisms(bacteria)
Difficult to maintain the optimumconditions of growth. (Because of difference of growth rate and condition)
Traditional single stage reactor(fermentor)
- Simultaneous Hydrolysis/Acidogenesis & Methanogenesis
- Difficult to operate under optimumconditions
- Very sensitive to change of environment
Analysis microorganism
(More
Cu/In 비에 따른 CuInS2 박막의 특성에 관한 연구
A Study on Properties of Cu/In ratio on the CuInS2 thin film
Abstract
CuInS2 thin films were synthesized by sulpurization of Cu/In Stacked elemental layer deposited onto glass Substrates by vacuum furance annealing at temperature 200[℃].
And structural and electrical properties were measured in order to certify optimumconditi
phase에 대한 adsorption정도에 따라 물질이 분리된다.
(1) 사용되는 경우
- Sample purification monitoring
- Quick establishment of optimumconditions for carrying out a synthesis
- Examination of crude reaction mixture
- Determining the homogeneity of a sample
- Conjunction with other evidence
- Establishing whether or not samples from different sources are identical
A B S T R A C T
The purpose of this study is to obtain optimum operation conditions for desirable products of MSWs gasification through experiments for different operating temperatures, moisture contents.
In this experiment, an updraft-stream gasifier was selected among several reactor types.
A target sample was recomposed of each component based on dry composition of MSWs that are dir
conditions using yeast to produce. In recent years, research has been actively conducted using production methods and using alcohol lignin contained hemicellulose in the lignocellulosic
In the last downstream process and remove the moisture generated in the fermentation process of alcohol distillation through azeotropic distillation, extractive distillation, the distillation process of the
hydraulic systems like
Brake
Steering
Throttle control
Transmission
Electronic and software
controlled
Automatically choose the
optimum speed and gear
Improve the operational
performance
“Expected to be realized as processors became less expensive
and more sensors with sophisticated control algorithms”
One of the most promising new featur
of 800*800mm2 in cross-sectional area and 1800mm in depth.
V-shaped promoter were located on the test surface 1200mm downstream from the plate edge.
*Measurements
Promoter : the length of the side B, the height H, the attack angle α
B=20mm(fixed) / H=2.5,5,10,20 and 30 mm / α=180,150,120,90,60 and 30 degrees)
2-3. Results & Discussion
When α=90° and H=10 mm is the optimal condition.
the high temperature fluids in the vicinity of the heated plate and introduce the low-temperature ambient fluids into the region behind the promoters.
The optimum height and the attack angle that make the overall heat transfer coefficients a maximum were determined for the present promoters and they are H=10mm and α=90 degrees, respectively, within the range of the present experiments.