Authors:Sheng-Hung Wu, Chu-Chin Hsieh, Chung-Cheng Chiang, Jao-Jia Horng, Wei-Ping Pan, and Chi-Min Shu
reactions or fire accidents. Industries are widely using nitrogen (N 2 ) as purge gas, when high O 2 concentration exists in the desorption zone. This study was used to analyze the thermal behavior of home-made zeolite by thermogravimetric analyzer (TG) in
Authors:T. Turtiainen, L. Salonen, and P. Myllymäki
Granular activated carbon (GAC) filters were installed in 12 private homes or vacation homes for removing unacceptably high concentrations of radon from household water. Radon removal efficiency was nearly 100% in most locations, although different water types were encountered. Other radionuclides such as uranium, radium, lead and polonium were removed less efficiently. Treated water quality remained good and no significant external radiation dose was caused to the residents.
Authors:Adil Mouahid, David Bessieres, Frédéric Plantier, and Gilles Pijaudier-Cabot
, the description of a thermostated combined calorimetric–manometric apparatus is given, this specific experimental device comprising a Setaram C80 differential heat flow calorimeter coupled with a home-built manometric system can work for pressures from
Authors:R. Carlini, C. Artini, G. Borzone, R. Masini, G. Zanicchi, and G. A. Costa
° ≤ 2θ ≤ 90° and refining data by Rietveld method using the DBWS-9807 program [ 21 ]. The thermoelectric power was measured by means of a home-made instrument shown in Fig. 1 . A heater applied on a face of a cylindrical sample produces a thermal flow
Authors:Hrudananda Jena, R. Venkata Krishnan, R. Asuvathraman, K. Nagarajan, and K. V. Govindan Kutty
9.5 Cs 0.5 (PO 4 ) 6 Cl 2−δ pellets of 10 mm diameter and ~10 mm height, sintered at 1273 K for 4 h in air were carried out by using a home built dilatometer, in the temperature range of 298–973 K. The bulk density of the pellets was measured using
Thermic detectors are seldom used in analytical laboratories, in spite of their advantageous properties. Their theoretical
basis provides simple relations and useful equations for the design and construction of thermic liquid analyzers. In this
paper a home-made detector system was used for the continuous determination of hydrochloric acid. The results were in accordance
with the theoretical considerations.
Radon maps for each county in New York State have been developed onthe township level indicating the percent of homes with .148 Bq/m 3 (4 pCi/l)in the indoor air of the basement and living area. Estimates are based ona combination of nearly 45,000 basement-screening measurements and correlationsto surficial geology. Many of the towns and cities in the State with the highestaverage indoor radon concentrations are located on highly-permeable gravellysoils formed during the retreat of the Wisconsinan Glaciation. As many towns(32% of total) had .5 measurements, a project to obtain additional measurementsin high-risk towns produced results comparable to estimates based on correlationsto surficial geology. Radon risk maps for each county have been distributedto municipal governments, schools, and professionals in activities relatedto homes, buildings, and indoor air quality.
Certain experimental improvements, as variable sample size and irradiation position, automation and flexibility in radiation detection, broaden the measurable concentration range, increase the possible rate and accuracy of analysis and enlarge the application range of the home-made nuclear analyzer for fissile material analysis by delayed fission neutron counting and for short-lived multielement analysis by neutron activation gamma-ray spectrometry. Intercomparisons of results by various methods and laboratories show the need for regular checks of techniques to ensure reliable measurements.
This article is a review of some of the results we have obtained by studying various kinds of emulsions using techniques from
the simplest one, a home-made differential thermal analysis to elaborated ones such as differential scanning calorimetry commercial
devices. These techniques were used not only to determine energetic values but also essentially to show and quantify physical
chemical phenomena such as undercooling, freezing, melting, mass transfer between droplets and solid formation involved in
Authors:D. Jiang, X. Li, Z. Qiu, R. Lu, Y. Li, and G. Zhang
Nuclear microprobe was used to measure single aerosol particles (SAPs) indoors from Shanghai. Every particle is characterized
with its micro-PIXE spectrum, which can be considered as the fingerprint of the SAPs. The pattern recognition technique (PR)
was applied to trace the SAPs back to their source. Results of five monitor homes at different locations in Shanghai show
that most of the measured indoor aerosol particles are derived from soil dust, cement dust, vehicle exhaust, coal boilers
and steel mill dust.