Jin Shik Choi

US Patent:

8431360, Apr 30, 2013

Filed:

Jul 26, 2010

Appl. No.:

12/843844

Inventors:

N. Louise Glass - Orinda CA, US
Chaoguang Tian - Beijing, CN
Huimin Zhao - Champaign IL, US
Jing Du - Champaign IL, US
Jin Ho Choi - Urbana IL, US
James H. Doudna Cate - Berkeley CA, US
Jonathan M. Galazka - Berkeley CA, US
Suk-Jin Ha - Champaign IL, US
Yong-Su Jin - Champaign IL, US
Soo Rin Kim - Urbana IL, US
Sijin Li - Urbana IL, US
Xiaomin Yang - Albany CA, US

Assignee:

The Regents of the University of California - Oakland CA
The Board of Trustees of the University of Illinois - Urbana IL
BP Corporation North America Inc. - Warrenville IL

International Classification:

C12N 1/00
C12P 21/04
C12P 21/06

US Classification:

435 691, 435 711, 435243

Abstract:

The present disclosure relates to host cells containing a recombinant polynucleotide encoding a polypeptide where the polypeptide transports cellodextrin into the cell. The present disclosure further relates to methods of increasing transport of cellodextrin into a cell, methods of increasing growth of a cell on a medium containing cellodextrin, methods of co-fermenting cellulose-derived and hemicellulose-derived sugars, and methods of making hydrocarbons or hydrocarbon derivatives by providing a host cell containing a recombinant polynucleotide encoding a polypeptide where the polypeptide transports cellodextrin into the cell. The present disclosure relates to host cells containing a recombinant polynucleotide encoding a polypeptide where the polypeptide transports a pentose into the cell, methods of increasing transport of a pentose into a cell, methods of increasing growth of a cell on a medium containing pentose sugars, and methods of making hydrocarbons or hydrocarbon derivatives by providing a host cell containing a recombinant polynucleotide encoding a polypeptide where the polypeptide transports a pentose into the cell.

US Patent:

54225965, Jun 6, 1995

Filed:

Jun 30, 1994

Appl. No.:

8/269278

Inventors:

Carter M. Armstrong - Kildeer IL
Jin J. Choi - North Potomac MD
Achintya K. Ganguly - Alexandria VA

Assignee:

The United States of America as represented by the Secretary of the Navy - Washington DC

International Classification:

H01J 2534
H01S 100

US Classification:

330 4

Abstract:

A folded waveguide gyrotron-traveling-wave-amplifier comprises: an electron gun for transmitting an axis-encircling beam of electrons with large transverse energy along a first path having an axis; an RF source for producing and applying in a second path an RF input millimeter wave signal having a bandwidth in a preselected frequency domain and having a transverse electric field; a source for generating a solenoid magnetic field parallel to the axis along the first path; a beam collector; and an interaction circuit such as an H-plane bend serpentine waveguide positioned within the solenoid magnetic field and having a narrow wall containing a beam tunnel hole for passing the axis-encircling beam of electrons therethrough to the beam collector, an output end, and an input end for receiving and passing the RF input millimeter wave signal through the H-plane bend serpentine waveguide to the output end to modulate the axis-encircling electron beam, the modulated axis-encircling electron beam amplifying the RF input signal and also broadening the instantaneous bandwidth of the amplified RF input signal through the negative mass instability in the fundamental forward space harmonic of both fast and slow wave regions in the preselected frequency domain. In a second embodiment, a double-ridged TE folded waveguide is used in place of the H-plane bend serpentine waveguide. In a third embodiment, there is no RF input signal and the interaction circuit generates an RF signal which is outputted from one of the input and output ends.

US Patent:

H17710, Jan 5, 1999

Filed:

Nov 29, 1996

Appl. No.:

8/757617

Inventors:

Jin Joo Choi - North Potomac MD
Carter M. Armstrong - Kildeer IL
Gunsik Park - New Haven CT

International Classification:

H01J 2500

US Classification:

330 45

Abstract:

The present invention is a coupled cavity gyrotron-traveling-wave-tube amplifier which produces highly efficient, broad band millimeter wave radiation. The present invention comprises an electron gun, a double ridged coupled cavity interaction circuit and a beam collector. In operation the gun injects a gyrating electron beam through a beam tunnel of a side wall of the coupled cavity. When the electron beam phase is synchronized with the rf phase of the transverse electric mode in the coupled cavity circuit, the electron beam is modulated and amplifies the rf input signal through the negative mass instability called electron cyclontron instability. The coupled cavity design of the interaction circuit effctively slows the rf-wave velocity, allowing amplification of the rf- wave over a broad band. This t ype of broad band microwave energy is highly useful in radar, communications and jamming technology.

Address:

5230 Birkdale Way, San Jose, CA 95138

VIN:

JNKCV61E79M303874

Make:

INFINITI

Model:

G37 SEDAN

Year:

2009