-
1.发明授权公开(公告)号：US10927388B2
公开(公告)日：2021-02-23
申请号：US16150760
申请日：2018-10-03
Inventor： Ju Hyun Yu , Chan Duck Jung , In Yong Eom , Seung Hwan Lee , Kyung Sik Hong , In-Chul Kim , Jong Geon Jegal , Bong Keun Song
IPC: C12P7/14 , C12P19/02 , C12P19/14 , C13K1/02 , C12P7/10 , C12P19/56 , C07H1/06 , C07H3/02 , C12P7/06 , C12P7/56
Abstract: The present invention relates to a method for preparing bioethanol from lignocellulosic biomass. The method of the present invention is capable of: minimizing the impurity content of an enzymatic saccharification raw material, by extracting biomass using hot water, before pretreatment, and removing extractable substances such as inorganic salts; suppressing, to the greatest extent, the production of overdecomposition products of sugar, by pretreating the biomass, from which the hot water extractable substances have been removed, in a condition for maximizing xylan yield; preparing fermentable sugar at a low cost, without washing a pretreated solid obtained from subsequent solid-liquid separation, but by only concentrating a sugar solution obtained after enzymatic saccharification, using a separation film; and preparing bioethanol therefrom in high yield.
-
公开(公告)号：US11753510B2
公开(公告)日：2023-09-12
申请号：US17597430
申请日：2020-05-28
Inventor： Sung Yeon Hwang , Jeyoung Park , Dong Yeop Oh , Tae Ho Kim , Si Gyeong Lee , Myung Suk Shin , Jong Geon Jegal
CPC classification number: C08J5/045 , C08G63/12 , C08G63/81 , C08K7/02 , C08G2230/00 , C08J2367/02 , C08K2201/005 , C08K2201/011 , C08K2201/018
Abstract: A biodegradable composite material which is produced by polymerizing a mixture of an aqueous dispersion of a natural polymer nanofiber including any one or more of a chitin nanofiber and a cellulose nanofiber, a dicarboxylic acid or a derivative thereof, and a diol. The biodegradable composite material has excellent biodegradable and mechanical properties.
-
公开(公告)号：US12269922B2
公开(公告)日：2025-04-08
申请号：US17056981
申请日：2019-03-19
Inventor： Jeyoung Park , Dong Yeop Oh , Sung Yeon Hwang , Hyun Gil Cha , Jong Geon Jegal , Ho Jun Kim , Seul A Park
Abstract: A method for preparing an aramid nanofiber dispersion includes dissolving an aromatic polyamide-based polymer in a solution including a basic material and an aprotic polar solvent, while performing stirring so that a nanofiber is produced, wherein the aromatic polyamide-based polymer is a polymer in a form of a solid which is not spun into a fiber form, the stirring is performed at a temperature of 50° C. or lower and at a speed of 10-1000 rpm so that a time taken for the aromatic polyamide-based polymer to be dissolved and formed into an aramid nano-fiber dispersion is 80 hours or less, an aramid nanofiber in the aramid nanofiber dispersion has an average diameter of 1 to 100 nm and an average length of 0.1 to 100 μm, and the basic material includes potassium hydroxide or sodium hydroxide.
-
公开(公告)号：US10597688B2
公开(公告)日：2020-03-24
申请号：US14655158
申请日：2013-12-26
Inventor： Ju Hyun Yu , Chan Duck Jung , Seung Hwan Lee , In-Chul Kim , Kyung Sik Hong , In Yong Eom , Jong Geon Jegal , Bong Keun Song
Abstract: The present invention relates to a method for preparing, from wood-based biomass, a high concentration of fermentable sugar which can be effectively used in culturing various industrial fermented bacteria. According to the method of the present invention, biomass can be extracted by hot water prior to a pre-treatment so as to remove extractible substances such as mineral salts to thus minimize the content of impurities in raw materials for an enzymatic saccharification. The biomass from which substances extractible by hot water are removed is pre-treated in the condition where xylan yield rate is maximized, thus achieving maximum inhibition of the generation of over-decomposed products of sugar. Subsequently, fermentable sugar for culturing various industrial fermented bacteria can be prepared in an inexpensive manner by only concentrating, using a separator membrane, the sugar solution obtained by an enzymatic saccharification of the pre-treated solid content obtained by a solid-liquid separation without washing the solid content with water.
-
5.发明授权公开(公告)号：US10329589B2
公开(公告)日：2019-06-25
申请号：US14991209
申请日：2014-06-09
Inventor： Ju Hyun Yu , Chan Duck Jung , In Yong Eom , Seung Hwan Lee , Kyung Sik Hong , In-Chul Kim , Jong Geon Jegal , Bong Keun Song
IPC: C07H1/06 , C12P7/06 , C07H3/02 , C12P7/10 , C12P7/14 , C12P19/14 , C13K1/02 , C12P7/56 , C12P19/56 , C12P19/02
Abstract: The present invention relates to a method for preparing bioethanol from lignocellulosic biomass. The method of the present invention is capable of: minimizing the impurity content of an enzymatic saccharification raw material, by extracting biomass using hot water, before pretreatment, and removing extractable substances such as inorganic salts; suppressing, to the greatest extent, the production of overdecomposition products of sugar, by pretreating the biomass, from which the hot water extractable substances have been removed, in a condition for maximizing xylan yield; preparing fermentable sugar at a low cost, without washing a pretreated solid obtained from subsequent solid-liquid separation, but by only concentrating a sugar solution obtained after enzymatic saccharification, using a separation film; and preparing bioethanol therefrom in high yield.
-
Patent Agency Ranking
6.发明申请公开(公告)号：US20190048380A1
公开(公告)日：2019-02-14
申请号：US16057617
申请日：2018-08-07
Inventor： Sun-Chang Kim , Ju Young Lee , In Seung Jang , Seohyun Kim , Jong Geon Jegal
IPC: C12P33/20 , C07K14/415 , C12N9/88 , C12N9/02 , C12N9/04
Abstract: The present invention relates to recombinant yeast, in which the productivity of ginsenoside is enhanced by overexpressing CPR5, PDI1, or ERO1 in yeast having the productivity of ginsenosides; a method for preparing the yeast; and a method for producing ginsenosides using the yeast.
-
公开(公告)号：US11299578B2
公开(公告)日：2022-04-12
申请号：US16618582
申请日：2018-07-11
Inventor： Sung Yeon Hwang , Jeyoung Park , Dong Yeop Oh , Jong Geon Jegal , Seon Mi Kim , Hyeon Yeol Jeon
Abstract: A self-restoring polyurethane-based polymer obtained by polymerization of a composition containing an aromatic disulfide diol represented by Chemical Formula, HO—Ar1—S—S—Ar2—OH, an alicyclic polyisocyanate, and a polyol. Ar1 and Ar2 each are independently a substituted or unsubstituted C6-C30 arylene group. The composition satisfies Equation, 0.1≤M[disulfide]/M[OH]. M[disulfide] is a total mole number of the aromatic disulfide diol in the composition, and M[OH] is a total mole number of the aromatic disulfide diol and the polyol in the composition.
-
公开(公告)号：US11186616B2
公开(公告)日：2021-11-30
申请号：US17026814
申请日：2020-09-21
Inventor： Ju Young Lee , In Seung Jang , Seohyun Kim , Sun-Chang Kim , Suk Chea Jung , Jong Geon Jegal
Abstract: Provided are a recombinant yeast having improved ability to produce ginsenoside, which is prepared by overexpressing INO2 and INO4 or deleting OPT1 in a yeast having ability to produce ginsenoside, a method of preparing the yeast, and a method of producing ginsenoside by using the yeast.
-
9.发明授权公开(公告)号：US11046990B2
公开(公告)日：2021-06-29
申请号：US16057617
申请日：2018-08-07
Inventor： Sun-Chang Kim , Ju Young Lee , In Seung Jang , Seohyun Kim , Jong Geon Jegal
IPC: C12P33/20 , C07K14/415 , C12N9/88 , C12N9/04 , C12N9/02
Abstract: The present invention relates to recombinant yeast, in which the productivity of ginsenoside is enhanced by overexpressing CPR5, PDI1, or ERO1 in yeast having the productivity of ginsenosides; a method for preparing the yeast; and a method for producing ginsenosides using the yeast.
-
公开(公告)号：US09914801B2
公开(公告)日：2018-03-13
申请号：US15534274
申请日：2015-12-01
Inventor： Jae Chang Lee , Jong Geon Jegal , Bong Keun Song
IPC: C08G63/08 , C08G63/85 , C08G63/91 , C08L101/00 , C09D167/04
CPC classification number: C08G63/08 , C08G63/78 , C08G63/85 , C08G63/91 , C08L101/00 , C09D167/04
Abstract: The present invention relates to a method for preparing a stereoblock polylactide, comprising: a step of obtaining a first reaction mixture with a monomer conversion rate of 80 to 95% by adding a catalyst to a D-lactide and growing a PDLA chain; a step of obtaining a second reaction mixture with a monomer conversion rate of 80 to 95% by adding an L-lactide to the first reaction mixture and growing a racemic PDLLA chain at the end of the PDLA chain; and a step of further adding an L-lactide to the second reaction mixture and growing a PLLA chain at the end of the PDLLA chain through a polymerization reaction. The preparation method is capable of providing a more convenient synthesis by skipping a process of removing residual monomers in the middle of the reaction, and also of preventing multi-blocking and oligomerization of polymer chains due to a mixture of chains by gradually adding polymerizable monomers while controlling the monomer conversion rate in a one-port synthesis, thereby reducing chain transfer during the polymerization.
-
-
-
-
-
-
-
-
-
Search Results
10
records
(took 0.017 seconds)
