.:. Introduction to the JSpecView Applet

.:. Description

JSpecView is a viewer for spectral data in the JCAMP-DX format. The program was developed at the Department of Chemistry of the University of the West Indies, Mona, Jamaica, WI and is being released via Sourceforge.net Logo under the GNU Lesser General Public License. It is written in JAVA and requires at least JAVA 1.5, although development is currently with 1.6
The code is available under version control (subversion - svn) at http://jspecview.svn.sourceforge.net/viewvc/jspecview/dev/

applet view
jspecview applet view		 application view
jspecview application view

.:. The use of JSpecView can best be seen with some examples....


In the simplest example, JSpecView is shown on a web page and JavaScript functions are used to interact with it to toggle the display of a grid or reverse the direction of the spectrum. In addition, a callback function is used to determine the position where the user clicked on the spectrum.

More sophisticated examples include the use of the Open Source applet Jmol to display molecular graphics and the two applets are able to interact using JavaScripts.

  1. IR spectra and displays of vibrational modes
  2. MS spectra and animations of fragmentations
  3. NMR spectra and displays of links to molecular structure
  4. GCMS hotlinked chromatograms
One simple way of displaying spectra or molecular graphics on-line is to pass the file names as parameters to web pages set up specifically for this purpose.
For JSpecView this can be done with a call like: <a href="Jmol/examples/JDXdisplay.html?script=load%20Crspectra.jdx; interface overlay">spectrum</a>
This page (Jmol/examples/JDXdisplay.html) can be used to load local files of spectra in JCAMP-DX format as well if Java security permissions allow it.

Similarly for Jmol the call might be: <a href="Jmol/examples/Jmoldisplay.html?script=load%20pinene.mol;background%20white;zoom%20120;frank%20off;set%20echo%20top%20center;echo%20pinene"> molecule</a> Once again the page (Jmol/examples/Jmoldisplay.html) is available for viewing local files (assuming Java permissions allow it).

.:. Further example web pages using JSpecView and web page coding:




Check the JSpecView sourceforge project page for the last announcements and sign up for the users mailing list to get further information and contribute to the discussion.

To download the jar files or source code, visit the Sourceforge Subversion Pages.
Copyright © 2007 by The University of the West Indies, all rights reserved.
Created November 2007. Links checked and/or last modified 6th December 2007.
For further information contact Prof. R.J. Lancashire, Department of Chemistry, UWI, Mona, Kingston 7, JAMAICA, (robert.lancashire@uwimona.edu.jm)