sterilization, Kimchi soup was packed into retort pouches, and sterility (F? value) at various positions in the product was measured through a wireless F? sensor. Heat penetration characteristics were significantly affected by sterilization method.
1. Staff ____________ in the building after 10:00 pm are requested to use the rear exit when leaving.
(a) will (b) remaining
(c) remained (d) remains
2.__________ there were not enough people to start the work, we managed to meet the deadline through an unified effort.
(a) despite (b) in
(c) nevertheless (d) although
3.The reason why Im calling you is that the shipments you forwarded have n
concerned with the use of fundamental and applied knowledge of materials so
that materials can be converted into the products necessary to and desired by society.
1.3 What are the main classes of engineering materials?
Metallic, polymeric, ceramic, composite, and electronic materials are the five main
1.4 What are some of the important properties of each of these engineering materials?
1.1 New Renewable Energy
New Renewable Energy= new energy+ Renewable Energy
New energy : future energy
Renewable energy: almost indefinitely energy
1 Replace petroleum
2 Carbon emits less than petroleum.
3 Sustainable energy can be used without depletion
Synthesis of PVAc and PVA
PVA(poly vinyl alcohol) is prepared by hydrolysis of PVAc, which is synthesized by emulsion polymerization of vinyl acetate.
Polyvinyl alcohol has excellent film forming, emulsifying, and adhesive properties. It is also resistant to oil, grease and solvent. It is odorless and nontoxic. It has high tensile