X-Ray
Crystallography
at the Sealy Center For Structural Biology
DIP System User Group *** ARCHIVED Page ****
Dear friends,
Mac Science's DIP systems have now been in several crystallography
laboratories in the US and Europe for several years. We have formed an
unofficial DIP user group with the approval of Mac
Science and Nonius. The goal
and purpose of this group is to help each other with our research applications,
and share any insights we may have in using the DIP systems.
Click here if you want your email address included in
the list below.
Tell us what system you have, and add any other information, links etc.
that you would like to be included in the list below. Email addresses and
other links are only included with the users permission.
An email list server for DIP users has been set-up. To
automatically enroll send an email (or click on the line below) with the
following enclosure:
add your_address@your_hostname
dip-users
Sincerely yours
Mark A. White
mawhite@utmb.edu
|
DIP2020k-12b |
Yale U. |
Thomas Steitz , |
DIP2020k-12b |
Salk Inst. |
S. Choe,
Joe Noel, |
DIP2020k-12b |
SUNYAB |
Philip
Coppens , Mike
Carducci |
DIP2020k-12b |
|
Alexander Wlodawer , |
DIP2030k-12b |
BCM |
Florante A. Quiocho , Bill
Meador , |
DIP2020k-12b |
Fox Chase C.C. |
Jan Feng
, Chiquito Crasto
, |
DIP2020kNW-12b |
UTSWMED |
Johann Deisenhofer , Zbyszek Otwinowski , |
DIP2020kNW-12b |
UVC |
Wladek Minor, |
DIP2030hVLM-16b |
UTMB |
Robert O. Fox , Stanley J. Watowich, Edmund W. Czerwinski,
Mark A. White |
DIP2030kVLM-16b |
UAB |
Mark Walters , Randy
Mann , |
DIP2030kVLM-NW-16b |
TA&M |
Jim Sacchetini , Edgar
Meyer , Stan Swanson
, |
DIP2030-NW-16b |
UTSWMED |
Steven Sprang , |
DIP2020-12b |
UNC Chapel Hill |
Otto Zhou , |
DIP1030V-16b |
NRL |
Carl Krandel , |
DIP2030-NW-16b |
U. Alberta |
Michael James , |
DIP2030-NW-16b |
Wasington State U. |
Wim Hol , |
DIP2030-NW-16b |
St. Judes H. |
Steve White , Charles
Ross , |
DIP-2030 &
multi-wavelength XRG
|
Salk Inst. |
S. Choe |
DIPUser
07/96 Mac Science's newest high-speed DIP2030 released.
The new system offers faster 155 sec. readout, 20 sec. erasure and
quick 30 sec. interchange speeds. Improvements in the hardware include
a new ethernet interface with full 32MB buffering of the image.
1996 Short Magnetic Mount for Kappa
Nonius developes new short Limbo
magnetic mount goniometer head. This head allows easy magnetic mounting
to the 48 mm IUCr standard goniometer length of the DIP mini-kappa.
11/98 Mac Science WEB Site.
Mac Science opens it's www.macscience.co.jp
catalog site. Now you can access the latest developments at Mac Science
directly from a WEB site.
11/98 New Generator- Multi Wavelength.
Mac Science's new multi-wavelength (MW-SRA) x-ray generator sees it's
North American debut at the Salk
Institute in San Diego CA. The new Salk MW-SRA features Au,Cu, and
Cr targets ,on the same anode, which are interchangable without breaking
vacuum.
11/98 New Radial Calibration:
J. Appl. Cryst. article by Mark A. White, Stanley J. Watowich, and
Robert O. Fox of UTMB
explains how the DIP user can easily create and apply a new radial calibration.
This technique offers a tool for recalibration of the DIP scanner, and
a diagnostic for changes in detector sensitivity. This technique was developed
prior to the new flood-field calibration applied to all new DIP scanners
from 1996. The author believes that this technigue offers the end-user
a simpler more robust calibration and diagnostic tool than a flood field
type calibration.
1/99 Nonius DIP2000 users group
formed
DIP2000 users notes, hints, and free software upgrades are available
to Nonius's DIP2000 users group members. To become a member simply
go to the Nonius home page and click on users pages.
1/99 New Xpress software released: version 3.2.3
The new version of MacScience's Xpress software offers additional utility
and some bug fixes. Members of the Nonius DIP users group can freely
download the new software.
Other News:
NEWS The X-Ray Crystallography
Newsgroup ,
NEWS Biomolecular Crystallography
Newsgroup ,
HOW TO: Tips on Using the DIP
HOW to use pseudo-2 theta IP Offset
angle (PTO).
The rotation of the IP with this ofset can be included in either
the film rotation or cassette rotz parameters. We prefer the latter.
The following are the equations we use to calculate the correct DENZO parameters.
Xbeam= Xbeam(0) - R ( 1 - Cos( PTO ) )
R = 140 mm DIP2020
Ybeam = Ybeam(0) - R Sin ( PTO )
R = 200 mm DIP2030
Cassette rotz = rotz(0) - PTO
PTO is in degrees
Note that the sign of PTO may vary with DIP version ( Weissenberg vs. NW
models, left vs. right hand). If your R-merge shows a significant
increase when using PTO see the New
Radial Calibration. - M. A. White
Contact Mac Science
Nonius: Enraf Nonius USA , Europe
Page created by Mark
A. White on or about June 1997
Page last maintained 11/98