Results 1 - 10 of 2750
Results 1 - 10 of 2750. Search took: 0.034 seconds
|Sort by: date | relevance|
[en] History has shown that man has continued to search for methods to protect his food from various spoilage agents. Traditional methods of food preservation such as drying, salting, fermentation, have been known for centuries and are being practised even today. Within the past century, modern technologies such as canning, freezing, refrigeration, the use of preservatives and pesticides, have further equipped man with an arsenal of methods to combat food losses and to increase the quantity, quality and safety of our food supplies. The most recent technology, irradiation, has gone through a great deal of research and development in the past 40 years and has shown a strong potential as another method for food preservation. As irradiation is still not familiar to the public at large, this paper attempts to inform scientists, officials, representatives of the food industry, and consumers of the global situation of the safety, benefits and applications of food irradiation by answering common questions often asked about the technology today. Special emphasis will be placed on the possible contribution of food irradiation to ASEAN
[en] Commercialization of food irradiation in Australia is receiving serious consideration and several potential applications have been suggested (Rigney; Wills, 1982; Wills, 1985). A full-scale feasibility study is a prerequisite for informed discussions about investment in commercial radiation facilities. However, these studies are complex, time-consuming, and expensive. Screening of technically feasible applications can help identify which ones have strong commercial potential and should therefore be included in a full feasibility study. Giddings (1983) has suggested that commercial success for a potential food irradiation application requires positive responses to questions concerning technical, economic, regulatory, need fulfilment, marketability, volume logistics and feasibility when compared with competing technologies. These criteria will be used to screen specific foods for their potential for commercialization in Australia. Updating may be required as circumstances change. Monetary values are given in Australian dollars (A$1 = US$0.07, October 1985)
[en] This paper reports the situation of the animal productions in Morocco. The author concludes that foodstuffs of animal origin are especially eaten fresh, the level of this consumption is low and the problems related to the food processing and distribution are somewhat elementary: that is particularly question of problems of hygiene, of wholesomeness and of organisation. (F.M.)
[en] The use of radioactive tracers particularly short-lived radioisotopes frequently offers advantages over conventional methods of analyses. Applications of nuclear techniques in the field of hydrology constitute important and sometimes unique tools for obtaining critical information needed for water resources management. Essentially, radiotracer techniques offer a safe, cost effective and powerful tool in the assessment, management and protection of water resources. The Centre for Energy Research and Training, Ahmadu Bello University, Zaria of late has been offering consultancy services to some industries in the area of radiotracer technique. The first nuclear reactor in Nigeria, the MNSR, is expected to be commissioned in the Centre very soon. Many short-lived radioisotopes such as Cu-64, Ga-72, Br-82, Hg-197 etc which are very important in hydrological studies can be produced by the MNSR facility. This article reports on the basic principles of the technique and its roles in hydrology
[en] Certain neutron excess heavy nuclei have a thick neutron skin on the nuclear surface. In this paper detailed collective densities excitations in heavy nuclei with a large neutron excess and a thick neutron skin will be considered within the framework of the 'hydrodynamic' model. It will be shown that low energy isoscalar excitations are possible. The knowledge obtained will give information on the neutron thickness, the compressibility and the surface tension of neutron excess at low density
[en] The analysis of the period distribution of eclipsing and spectroscopic binary systems shows the presence of some secundary maxima, which cannot depend on selection effects. These secundary maxima are mainly due to late type stars, as can be seen from the distribution curves for eclipsing binaries of various spectral types. The average separation of the components (in units of the sum of stellar radii) increases with the spectral type from O types to late B types, remaining almost constant for later spectral types. (Auth.)
[en] Complete text of publication follows. The Harang discontinuity is known as the region in the near magnetospheric tail where the earthward plasma flow is divided into the parts passing the Earth on the dawnward or duskward sides. The importance of this bifurcation point for the substorm onset has long been discussed controversially. Presently there is more and more observational evidence provided that the intense field-aligned current (FAC) associated with the substorm break-up is connected to the Harang discontinuity. Based on a catalogue of more than 4000 substorms a statistical study of the onset characteristics has been performed. For about 50 cases nearby CHAMP observations are available. They show systematically the presence of a strong upward FAC in the center flanked by weaker downward currents on the poleward and equatorward sides. In certain cases the magnetic field variations exhibit some helical signatures. We will try to explain the observations in a global picture.
[en] Contraband detection systems for homeland security applications are typically tested for probability of detection (PD) and probability of false alarm (PFA) using pass-fail testing protocols. Test protocols usually require specified values for PD and PFA to be demonstrated at a specified level of statistical confidence CL. Based on a recent more theoretical treatment of this subject , this summary reviews the definition of CL and provides formulas and spreadsheet functions for constructing tables of general test requirements and for determining the minimum number of tests required. The formulas and tables in this article may be generally applied to many other applications of pass-fail testing, in addition to testing of contraband detection systems.