Navigation Links
Radioactivity: Discover the lowest amounts with new methods
Date:9/16/2008

o the otherwise possible separation of the aerosol particle at surfaces of the chamber, on the other hand. The thoron progenies which mainly accumulate on the aerosol particles, shall be measured analogously by measuring the radon progenies after their separation by means of wire meshes (free fraction) or filters (fraction attached on aerosol partiles) in a follow-up product measuring set-up. By simultaneous spectrometry of the α- and γ-radiation emitted from the sample, quantifying of all thoron progenies as well as traceability of the measurement to the national activity standard is guaranteed.

2. Improvements of low-level gamma-ray Spectrometry Systems at UDO

Abstract: The Physikalisch-Technische Bundesanstalt (PTB), the German metrology institute, operates various low-background gamma-ray spectrometry systems at the underground laboratory (UDO) in the Asse salt mine, near Braunschweig. The experiences gained with these detector systems within ten years of operation lead to various changes and improve-ments of the experimental installations. In 2004, the whole UDO facility had to be moved within the Asse mine from its former location at a depth of 925 m to the present depth of 490 m. At its new location, the radon activity concentration in air (about 60 Bq/m3) is by a factor of three higher than at the 925 m level. Therefore, it became necessary to signifi-cantly improve the shielding against radon, at least for the most sensitive detector system. This radon shield consist of an almost air-tight box which surrounds the whole passive shielding (the latter is composed of 20 cm of lead and 10 cm of electrolytic copper). In addi-tion, an improved nitrogen flashing of the inner volume of the detector chamber was realized by changes of the design. At the same time, the end-cap of this detector was exchanged with the aim to reduce the inherent background of the system (especially from 40K). The background characteristics achieved wit
'/>"/>

Contact: Dr. Dirk Arnold
dirk.arnold@ptb.de
Physikalisch-Technische Bundesanstalt (PTB)
Source:Eurekalert

Page: 1 2 3

Related biology news :

1. Mass. Generals Warren Triennial Prize honors discoverers of microRNAs
2. How are herbicides discovered?
3. TGen and Washington University researchers discover new approach to treating endometrial cancer
4. Key discovered to cold tolerance in corn
5. Researchers discover atomic bomb effect results in adult-onset thyroid cancer
6. Unexpected large monkey population discovered
7. Munich researchers discover key allergy gene
8. Johns Hopkins scientists discover what drives the development of a fatal form of malaria
9. Mount Sinai researchers discover technology that silences genes
10. MSUs discovery of plant protein holds promise for biofuel production
11. Smithsonian scientists discover new bird species
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:6/23/2015)... Fla. , June 23, 2015 /PRNewswire/ ... management and authentication solutions, today announced enhanced functionality ... multi-factor authentication solution.  The enhancements build on ... of the DigitalPersona Altus platform and provide ... compatibility. In today,s environment of ...
(Date:6/18/2015)... Conn. , June 18, 2015 NXT-ID, Inc. ... authentication company focused on the growing mobile commerce market announces ... a featured segment on "Money on the Mark", scheduled to ... City June 20 th . ... will be from 7:00 to 8:00pm EST. NXT-ID, Inc.,s CEO ...
(Date:6/17/2015)... Germany , June 17, 2015 ... Standard: QIA) today launched new Investigator ® STR assay ... the United States . The new genetic ... key genomic markers (short tandem repeats or STRs) for DNA ... evaluate the quality of DNA in each sample, a novel ...
Breaking Biology News(10 mins):Crossmatch Releases Enhanced DigitalPersona Altus Advanced Authentication Functionality 2NXT-ID, Inc.'s CEO Gino Pereira Talks About the Wocket Smart Wallet on WABC Radio, New York City, June 20th 2NXT-ID, Inc.'s CEO Gino Pereira Talks About the Wocket Smart Wallet on WABC Radio, New York City, June 20th 3QIAGEN Launches New Genetic Fingerprinting Kits for U.S. Forensic Labs 2QIAGEN Launches New Genetic Fingerprinting Kits for U.S. Forensic Labs 3QIAGEN Launches New Genetic Fingerprinting Kits for U.S. Forensic Labs 4QIAGEN Launches New Genetic Fingerprinting Kits for U.S. Forensic Labs 5
... Mich. Picture a pretzel factory production line, with conveyer belts ... to be cooked. Now imagine what would happen if ... blob onto the conveyor, misshapen, and sticking fast to the dough ... And if that mess could no longer be conveyed into the ...
... struggle first observed in a species of North American ... European common lizard. The two species are separated by ... they share behavioral and reproductive details right down to ... research published in the November issue of American Naturalist ...
... Researchers at the University of Warwick have devised a ... warped fingerprints in just a few seconds. Previous ... on a finger print and laboriously match them against ... consider the entire detailed pattern of each print and ...
Cached Biology News:Botched production of insulin molecule may lead to diabetes 2Botched production of insulin molecule may lead to diabetes 3Botched production of insulin molecule may lead to diabetes 4Three-way mating game of North American lizard found in distant European relative 2Three-way mating game of North American lizard found in distant European relative 3Three-way mating game of North American lizard found in distant European relative 4New technology identifies warped fingerprints at warp speed 2
(Date:6/30/2015)... ... 30, 2015 , ... Matrix Marketing Group, LLC , a leading provider ... to head up its account management department as vice president of client services. ... senior account management and delivery expertise to the growing Matrix Marketing Group team in ...
(Date:6/30/2015)... 2015  The Dr. Samadi Prostate Cancer Center in ... full suite of new genetic testing methods for men with ... prostate cancer. Dr. Samadi,s Prostate Cancer ... assessing the risk and optimizing the diagnosis of prostate cancer, ... to now offer these revolutionary genetic tests to men with ...
(Date:6/29/2015)... ... June 30, 2015 , ... This cutting edge standard making is ... Featuring 12 distinct peaks, the WAV-8 is the world’s first cuvette-shaped, solid-state filter that ... into the NIR range. Previous spectrophotometer calibration standards, such as those made from didymium ...
(Date:6/29/2015)... DIEGO , June 29, 2015 BioNano ... group of top research institutes, announced today that a ... Mount Sinai resulted in the creation of the first ... complementary single DNA molecule methods for sequencing and genome ... , provided the comprehensive analysis of the contiguous diploid ...
Breaking Biology Technology:Matrix Marketing Group Expands Client Services Team 2New Revolutionary Genetic Testing for Prostate Cancer Offered at Dr. Samadi's Prostate Cancer Center 2New Revolutionary Genetic Testing for Prostate Cancer Offered at Dr. Samadi's Prostate Cancer Center 3New Revolutionary Genetic Testing for Prostate Cancer Offered at Dr. Samadi's Prostate Cancer Center 4New Revolutionary Genetic Testing for Prostate Cancer Offered at Dr. Samadi's Prostate Cancer Center 5FireflySci Releases Spectrophotometer Calibration Standards for NIR Wavelength Accuracy Verification 2FireflySci Releases Spectrophotometer Calibration Standards for NIR Wavelength Accuracy Verification 3BioNano Mapping Technology Achieves Most Contiguous Clone-free Human Genome Assembly to Date 2BioNano Mapping Technology Achieves Most Contiguous Clone-free Human Genome Assembly to Date 3
... the midst of a transition from imitator to innovator in ... of barriers and opportunities facing that country,s health biotech industry. ... the McLaughlin-Rotman Centre for Global Health (MRC), says South America,s ... capacity to emerge as a major global player. It ...
... GPRO ) announced today that the Company will present ... Medical Technology,Conference on Wednesday, June 11, 2008 at approximately ... is scheduled to be webcast,live and may be accessed ... website at http://www.gen-probe.com . The webcast will be,available ...
... 6 Bioheart, Inc. (Nasdaq:,BHRT) will host its 2008 ... Chispa Restaurant, located at 11500 NW 41st Street in ... Interested parties may listen to the Bioheart, Inc. ... or (706) 643-0580,(international). To listen to the Annual Meeting ...
Cached Biology Technology:Brazil's biotech firms: From imitators to innovators in health-related products 2Brazil's biotech firms: From imitators to innovators in health-related products 3Brazil's biotech firms: From imitators to innovators in health-related products 4Brazil's biotech firms: From imitators to innovators in health-related products 5Brazil's biotech firms: From imitators to innovators in health-related products 6Gen-Probe to Webcast Presentation at Seventh Annual Needham Biotechnology and Medical Technology Conference 2Bioheart, Inc. to Host Annual Meeting of Shareholders on Wednesday, July 30, 2008 2
...
Anti-G-alpha-i 1 G-Protein Host: mouse monoclonal Species Reactivity: human, mouse, rat Applications: WB Storage: 4C...
oligophrenin-1 (H-100)...
Mouse monoclonal [DAPK-55] to DAP Kinase 1 ( Abpromise for all tested applications). entrezGeneID: 1612 SwissProtID: P53355...
Biology Products: