Download or read book Influence of Soil on Detection of Buried Explosives and Tunnels by Trace Gas Analysis written by and published by . This book was released on 1971 with total page 48 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Influence of soil detection of buried explosives and tunnels by trace gas analysis written by and published by . This book was released on 1971 with total page 43 pages. Available in PDF, EPUB and Kindle. Book excerpt: Detection of mines, explosives, and tunnels may be accomplished by sensing associated volatile effluvia. This investigation was undertaken to provide a basis for predicting the diffusion of volatile compounds from underground sources into the atmosphere. Diffusion of a volatile compound was studied for a range of soil conditions utilizing soils from the mine detection sites in Puerto Rico. A new mathematical analysis based on the Monte Carlo method was developed for predicting vapor diffusion through soil into the atmosphere. It was determined that diffusion in soil can be reliably predicted if soil porosity, moisture content, and affinity for the compound are known. Appearance in the atmosphere is also dependent on accumulation of the compound in air at the soil/atmosphere interface. Diffusion of volatile compounds through soil into the atmosphere is not likely to be an important factor in tunnel detection due to depth of overburden. However, adsorption of compounds at tunnel walls is likely to significantly reduce the amount of vapor appearing in the atmosphere through entrances and vents. Detection in the atmosphere of TNT vapor from mines and explosives buried in moist, porous soil should be possible under ideal sample collection conditions. (Author).

Download or read book USA CRREL Technical Publications written by Cold Regions Research and Engineering Laboratory (U.S.) and published by . This book was released on 1972 with total page 386 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book CRREL Technical Publications 1950 1975 written by Cold Regions Research and Engineering Laboratory (U.S.) and published by . This book was released on 1992 with total page 284 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Special Report Corps of Engineers U S Army Cold Regions Research and Engineering Laboratory written by Cold Regions Research and Engineering Laboratory (U.S.) and published by . This book was released on 1972 with total page 478 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Monthly Catalog of United States Government Publications written by United States. Superintendent of Documents and published by . This book was released on 1971 with total page 1670 pages. Available in PDF, EPUB and Kindle. Book excerpt: February issue includes Appendix entitled Directory of United States Government periodicals and subscription publications; September issue includes List of depository libraries; June and December issues include semiannual index.

Download or read book Monthly Catalog of United States Government Publications written by and published by . This book was released on with total page 1386 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Monthly Catalog of United States Government Publications Cumulative Index written by United States. Superintendent of Documents and published by . This book was released on 1976 with total page 1466 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Host Bibliographic Record for Boundwith Item Barcode 30112050443578 and Others written by and published by . This book was released on 2013 with total page 596 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Canadian Journal of Remote Sensing written by and published by . This book was released on 1979 with total page 332 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Bibliography of Mass Spectroscopy Literature for 1972 Compiled by a Computer Method written by and published by . This book was released on 1975 with total page 522 pages. Available in PDF, EPUB and Kindle. Book excerpt: This report covers the year 1972, and lists approximately 10,000 articles of interest to mass spectroscopists. This two-volume report consists of three sections. Vol. II contains the Key Word Out of Context Index (KWOC Index) section. The KWOC Index lists the key words, the reference numbers of the articles in which the key word appears, and the first 100 characters of the title.

Download or read book Cumulative Title Index to United States Public Documents 1789 1976 written by Daniel W. Lester and published by . This book was released on 1980 with total page 676 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Government Reports Index written by and published by . This book was released on 1971 with total page 954 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Analysis of Vapors Emitted from Military Mines written by and published by . This book was released on 1973 with total page 24 pages. Available in PDF, EPUB and Kindle. Book excerpt: The vapor evolving from several types of intact military mines was analyzed using gas chromatography and gas chromatography/mass spectroscopy. Cyclohexanone was positively identified in the vapor from M15 (metallic) and M19 (nonmetallic) antitank mines. This compound originates from composition B, the explosive used in these mines. Acetone, toluene and an unknown organo-silicon compound were identified and are attributable to the nonmetallic mine casings. Although positive mass spectral identification is lacking, chromatographic data obtained using an electron capture detector indicated that 2, 4, 6 trinitrotoluene was detected in the vapor from the M16 (metallic) antipersonnel mines which are loaded with TNT.

Download or read book Exploratory Analysis of Vapor Impurities from TNT RDX and Composition B written by and published by . This book was released on 1973 with total page 28 pages. Available in PDF, EPUB and Kindle. Book excerpt: Vapors collected from TNT, RDX and composition B explosives maintained at 25C and 70C were analyzed using a gas chromatographic/mass spectrometric technique to identify the most prominent vapor components. A gas chromatograph equipped with electron capture and flame ionization detectors also was used to screen vapors for components present at concentrations below the sensitivity of the GC/MS. Cyclohexanone which could have significance in development of an explosive or mine detector was identified in vapors from RDX and composition B. Water vapor, carbon dioxide, probably nitrous oxide and a number of unidentified compounds were evolved from all samples. It may be possible to identify these unknown compounds present at trace levels, but extreme analytical care and precaution to avoid contamination would be required. In this regard, differentiation between compounds which are incorporated into the explosive matrix during manufacturing and those which are adsorbed from air by the explosive at a later time is also required.

Download or read book Bibliography on Cold Regions Science and Technology written by and published by . This book was released on 1973 with total page 1240 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Catalog of the United States Geological Survey Library written by U.S. Geological Survey Library and published by . This book was released on 1976 with total page 770 pages. Available in PDF, EPUB and Kindle. Book excerpt: