Search results for "SPECT"
showing 10 items of 28650 documents
Circular economy and environmental protection
2022
<abstract> <p>The circular economy represents a form of corporate production with respect to environmental resources. In the past, these production systems were widespread on the basis of the non-removability of the production factors. The advent of economic growth, in capitalist economies, has led to the deconstruction of production cycles resulting to a food product being produced in one part of the world, whilst the raw materials and processing phases are carried out in several parts of the world, due to the low production costs there. While these economic systems, on the one hand, have led to a growth in the global economic system, on the other hand they have determined the …
Human Rights in Tourism: Conceptualization and Stakeholder Perspectives
2007
The present paper is an attempt to integrate the concept of human rights into the mainstream tourism discourse. In the name of development, human rights are often neglected while there are definite long-term advantages to be gained by actively promoting it. The paper examines the human rights perspectives of the major stakeholder groups in tourism to finally arrive at a comprehensive picture. Implications of some of the general principles and proclaimed guidelines of human rights for tourism are discussed. It is concluded that sustainable development of tourism is not possible until human rights as a relevant category is recognized by all the stakeholders. In addition, a case study is provi…
Vibrational Spectroscopy
2015
The molecular information provided by the vibrational spectra obtained by both absorption in the near-infrared and middle-infrared range and Raman dispersion has been critically evaluated to obtain specific information for the authentication of protected designation of origin foods and other food geographical indications. The literature in this field has been updated and the capability of the vibrational spectra to provide discrimination between foods produced in different areas and by using different processes are also discussed.
Rotational collisional line broadening at high temperatures in the N2 fundamental Q-branch studied with stimulated Raman spectroscopy
1986
Self broadened N 2 Q-branch spectra are measured by high resolution stimulated Raman spectroscopy in the pressure region 0.25-1.9 atm. and in the temperature range 295-1310 K. Non additivity of the Q(J) components due to line overlap arising in the highest pressure range explored is carefully taken into account. Excellent fit of the whole spectra is thus obtained for each pressure with linearly density-dependent line widths. Semi-classical calculations of the line-broadening coefficients lead to consistent values with all the measured ones. These calculations are extended to higher J values and to higher temperatures (up to 2500 K). At last, a simple phenomenological model based on a polyno…
Spontaneous Raman Scattering Spectrum of Gaseous IrF6 in the Ground Electronic State
1996
Stimulated Raman spectroscopy as the essential tool for studying collisional effects : application to combustion
1994
No abstract available
Collisional Relaxation Processes Studied by Coherent Raman Spectroscopy for Major Species Present in Combustions
1992
The effects of collisional relaxation processes on the Q-branch profile of major species present in combustions have been studied by high resolution stimulated Raman spectroscopy. Particular interest has focused on the following collisional systems: N2-N2, O2-O2, CO2-CO2, O2-N2, N2-CO2 and N2-H2O. For each colliding pair, starting from accurate determinations of line broadening coefficients over a wide temperature range, state-to-state rates for rotational energy transfers have been deduced by using various fitting laws. Among these rate laws, special attention has been paid to the temperature dependence of the energy corrected scaling (ECS) law combined with a hybrid exponential-power law …
Improvement of Raman Spectra of SAPO-5 by Chromium(III)-Induced Luminescence Quenching
1995
Impulsive excitation of high vibrational states in I2–Xe complex on the electronic ground state
2010
Abstract High vibrational states, up to ν = 22, are excited and investigated on the ground electronic state of a 1:1 I 2 –Xe complex isolated in solid Kr using femtosecond CARS technique and spontaneous resonant Raman measurements. The results show that this system is a promising candidate for investigations of coherent control of bimolecular reactions by using vibrational wavepackets on the ground electronic state.