Korea Kumho Petrochemical Co., Ltd.

Hosull Lee

Dae Young Lee

Seong-Ju Kim

Hyun Kyung Sung

Kwanyoung Lee

Ki-Dae Kim

Chang Ho Chung

Hyun Jung Kim

Yong Sig Kim

Jeong Woo Cho

Soo Kyung Oh

Sun Chung Park

Kill-Soo Jang

Min-Seok Cho

Kyo-Dong Jo

The present invention relates to an improved secondary battery having high weight energy density and good reversibility, more specifically, a battery containing i) a positive electrode comprising a reversible positive electrode material containing an organosulfur compound wherein sulfur-sulfur bond is formed upon oxidation and sulfur-sulfur bond is cleaved upon electrolytic reduction, an electroactive component selected from main group elements compound, electrically conductive ingredients and a current collector containing copper metal; ii) a polymer electrolyte having lithium salt; and iii) a negative electrode made of lithium metal, lithium alloy or lithium intercalating carbon.

High capacity composite electrode and secondary cell therefrom

Provided is a method of preparing a light-weight and inexpensive void type plastic pigment having enhanced hiding power and whiteness relative to inorganic pigments such as titanium oxide or organic pigments such as conventional styrene polymeric plastic pigments by regulating the content of each monomer in the sheath polymerization after core polymerization and controlling the glass transition temperature of the first sheath which is the shell obtained by initial polymerization less than that of the core by 70 to 120.degree. C., thus increasing the difference of refractive index between the polymeric matrices.

Method of preparing void type plastic pigment

DNA sequences encoding antiviral proteins, amarandin 1 and 2 from Amaranthus viridis is disclosed. Expression vectors encoding amarandin 1 or 2 and transformed host cells are also disclosed.

Antiviral proteins, amarandin 1 and 2, from Amaranthus viridis, DNAs

There are disclosed novel photoresist compositions employing phosphazene compounds as ballast, unabsorbent of light at a band of i-line and g-line and superior in thermal resistance and sensitivity as well as resolution, characterized by introducing photosensitive groups into phosphazene type ballast represented by the following formula I: ##STR1##

Positive photoresist composition containing naphthoquinone diazide

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Taejeon, South Korea

Hosull Lee