[en] It is shown that very intensive gravitational fields (as those in the black-hole proximity) give rise the other interactions of the nature, taking advantage of the gravitational energy and due to the manifestation of suitable symmetries.(Author)

[en] In this paper we develop and illustrate the way to obtain the relative intensities of the Moessbauer-spectrum. The calculations were made in multipolarity D1 for several spin resonances. Beside we explain the importance on the deep of the Moessbauer-spectrum resonance lines. (Author)

[en] This paper reviews Higgs production and decays at LEP energies (√S≅M_z) for light Higg bosons (M_H< M_z) in the frame of the Minimal Standard Model. The Higgs production process e⁺e^-→Z→H^oγ is also studied, and compared with the reactions e⁺e^-→Z→H^o(μ⁺μ^-,e⁺e^-), and the inclusive process e⁺e^-→Z→H^oX. Additionally, the Standard Model prediction for σ(e⁺e^-→H^o+hadrons)xB_r(H^o→γγ) is compared with the experimental upper limit given by the L3 experiment at LEP. (Author)

[en] In this work we have developed a technical and economical study for the stablishment of a industrial gamma irradiation facility in Ecuador. This facility would have a multiple use, it could be used in two principal fields: sterilization of disposable medical supplies and food preservation. The technical study is related with the desing of the irradiator source and the calculation of shielding walls and the selection of same important equipments. The economical study foresees a useful life of ten years in ral values and actual values related to the year of installation wich is considered the initial year

[en] It is presented a brief description of the investigations Technology. Considering the potentiality of the country, to export non traditional and exotic fresh fruits, fresh vegetables, and ornamental fresh cut flowers, studies ares initiated to use ionizing radiation as quarantine treatments. This paper reports the initial data obtained with two species of fruit fly of high incidence in the fruit producer zones of Ecuador, whose stable and permanent microclimates allow to produce a sort of fruits along all year

[en] Mass attenuation coefficients for secondary electrons (electrons generated by photon interactions) are estimated by using a simple simulation program. The coefficients show a strong dependence on the attenuator composition. When the electrons are generated via Compton interactions, the mass attenuation coefficients are almost independent of the medium where they were created. These values are used in the photon cavity theory. (Author)

[en] The contamination of Aspergillus flavus is studied in yellow maize, Zea mays, Peanuts, Arachis hipoguea, L.; Casabe, Yuca. Manhot esculenta, D.C. The contents of aflotoxines B₁, B₂, G₁ and G₂ is analized in food stuffs of popular consumption. The samples with higher contamination of A. flavus were irradiated with 1-3 KGy, and combined processes with gamma irradiation were assayed with previous and separate treatments with ammonia and hipochlorite. Thus, it was possible to lower the contamination of this fungus from 10³ u.f.c/g to 10. Separate edible mushrooms of species Boletus edulis, were radurized with gamma irradiation dose of 2 KGy. It was possible to reduce the contamination of 10⁷ microorganism/gram, to the value 10³ - 10² microorganism/gram. The microbial contamination of 18 species and aromatic herbs is also studied. The contaminating fungi of these food products as well as of the edible mushrooms, were identified as Penicillum, Geortrichum, Mucor, Galdosporium and yeasts of Canida sp. The optimal irradiation doses of same species and tea herbs, are determined. At the same time de d10 irradiation doses for pure stubs of main microorganisms are determined. To reduce the microbial contamination of many foodstuffs to maximun permisible values it is proposed thesi technology eitherwith only irradiation, or with combined treatments with irradiation

[en] Shelled shrimps without the head, from the Penaeus Spp. (Vennamei and Stylirostris), the most cultivated in the country, were irradiated with mean doses of up to 3.0 KGy. No significant difference was found al p=0.05 in the sensorial analyses for odor and taste, when compared to those receiving no treatment. By using a microbiological and a turbi-spectrometric methos, it was determined that 0. 262 KGy (26.1 Krad) was D sub 10 decimal reduction value for Escherichia Coli, a common bacteria on the shrimps. By usign microbiological and chemical control parameters, storage trials to 15 ^oC and 0-2 ^oC were carried out for shrimps irradiated with mean doses up to 2.0 KGy and packed in nylon-poliethylene bags. Those kept to -15 ^oC showed no deterioration of quality up to 6 weeks storage, the limit of the test. Unirradiated shrimps kept to 0-2 ^oC were in good condition 2 weeks, whereas those irradiated with 1.0 or 2.0 KGy gives a value of 29 USD/ton in the case of using a Co-60 irradiator an 33 USD/ton when using accelerated electrons

[en] The following work outlined the way for solving the total hyperfine Hamiltonian which describe the Moessbauer effect independently of the type of the absorber we have, the result is applied to a nuclear energy level with 3/2 spin. (Author)

[en] A geochemical exploration is being held through the use of acuatic bryophytes as mineralization indicators, in Morona-Santiago province (Ecuadorian Amazon Region). This is the first time that plants are used in Ecuador in mineral searching. We pretend to determine anomalous values and to establish the background radioactivity of the area. Through the almost normal distribution of the data it is possible to establish that the hepatic bryophytes durmortiera hirsuta (Sw) Nees maninly and thidium sp, mittenothamnium reptants and plagiochilla sp. had uranium anomalous values. These values are closely and directly related to those found in the river sediments of the Macuma formation