At the time there are various options in the range of disinfecting materials applied in animal husbandry. In animal husbandry and food processing industry a new type of biocide – neutral anolyte (ANK) has been used for the purposes of disinfection, presterilization, purification and sterilization. ANK is produced in the STEL devices by electrochemical activation of sodium chloride solution. Aim of the study: to evaluate (under the laboratory conditions) the antibacterial washing qualities of neutral anolyte ANK, produced in the STEL-10N-120-01 devices, in its application for washing and disinfecting milking equipment and parlours. The efficiency of disinfection was estimated applying the method of pads (LAST EN ISO 4833: 2003). Inhabitable materials in the water were identified using “Delves” test, according to the standard LST 1263:1999. The physical-chemical examinations of water were carried (HN 24:2003). Under the laboratory conditions, anolyte ANK (produced in the STEL-10N-120-01 devices) solution with the concentration of 0.05% suppressed the increase of the Escherichia coli, Staphylococcus aureus, Streptococcus agalactiae, Salmonella and the coliform bacteria. The anolyte ANK solutions with the concentration 0.05% and 0.025% (made from the 0.05% solution watering it down in proportion 1:1) were not efficient in the pig farm A. The 0.05% anolyte ANK solution was efficient sanitarily treating the milkers equipment in the farming B.

La filtration membranaire est une technique séparative utilisée fréquemment comme procédé permettant de retenir et d'extraire les microorganismes présents dans un fluide. Le mécanisme de sélectivité classiquement admis dans ce procédé est l'exclusion par la taille. Cependant, nos travaux ont permis de mettre en évidence un transfert de microorganismes à travers la structure poreuse des membranes au cours d'opérations de filtration, alors que les dimensions des cellules vivantes en suspension sont supérieures au diamètre moyen des pores de la membrane, entrainant une diminution du taux de récolte des microorganismes et une contamination de la phase perméat. Les caractéristiques morphologiques et nanomécaniques des cellules bactériennes sélectionnées pour nos travaux ont été observées et les propriétés du matériau membranaire modèle ont été mesurées. Grâce à ces informations, le transfert des bactéries aux premiers instants d'une filtration frontale a pu être évalué et le rôle de différents paramètres opératoires appliqués (type de souche bactérienne, composition physico-chimique de fluide filtré, PTM) a pu être commenté. Ainsi, nos résultats ont permis de préciser les mécanismes de sélectivités appliqués aux bactéries à Gram positif et à Gram négatif qui différent du fait des caractéristiques structurales de la paroi bactérienne (épaisseur et élasticité de la couche de peptidoglycane). Enfin, l'évolution du transfert de cellules vers la phase perméat a également été suivie et la mise en place du dépôt bactérien colmatant à la surface de la membrane a été observée. Le rôle de ce dépôt structuré sur les variations de débit et de transfert a donc pu être mis en évidence pour les trois modèles bactériens sélectionnés. Nos résultats ont permis de définir des conditions critiques (physiques, chimiques et biologiques) pour lesquelles le transfert de cellules bactériennes par déformation est amplifié au cours d'une filtration membranaire frontale. / Membrane filtration is a separation technique commonly used as a method for removing and extracting microorganisms present in a fluid. The selectivity mechanism is size exclusion. However, our work has highlighted transfer of microorganisms through the porous membrane structure during filtration operations, even if the size of the living cell in suspension is greater than the average pore size of the membrane, resulting in lowering of the accumulation rate of the microorganisms and thus contamination of the permeate phase. Morphological and nanomechanical characterization of selected bacteria cells used for our work were performed and the properties of the model membrane were analyzed. With this information, the transfer of bacteria dunring the first moments of the dead-end filtration has been evaluated and the role of operating parameters (type of bacteria strains, physicochemical composition of filtered fluid, TMP) has been studied. Thus, our results have clarified the selectivity mechanisms applied to Gram-positive and Gram-negative bacteria strains because of different structural characteristics of the bacterial cell wall (thickness and elasticity of the peptidoglycan layer). Finally, evolution of cells transfer to the permeate phase has also been followed, and the bacterial deposit clogging the membrane was observed. The role of the structured deposit on the variations in flow and transfer has been demonstrated for the three selected bacterial models. Our results have defined critical conditions (physical, chemical and biological) where the transfer of bacterial cells is amplified by deformation during a frontal membrane filtration.

The State Institution for Education of Feebleminded Girls was one of the two swedish educational institutions established under state management in the 1920s and came to be the starting point for further government operations for the mentally deficient. The purpose of this paper was to investigate the activities of the State Institution for Education of Feebleminded Girls, out of what needs the institution filled in Sweden’s care for the mentally deficient. The institution has tried to be understood from the view of eugenics and the perspective of children that was current during the 1900s first half.To fulfill the purpose of the study, the archives for the State Institution for Education of Feebleminded Girls was studied and analyzed with basis of previous research on Sweden’s care for the mentally deficient and the impact from eugenics and Sweden’s child perspective.The study shows that the State Institution for Education of Feebleminded Girls mostly existed to educate students and adapt them to the community, which the institution did by education, disciplinary interventions and sterilizations. It is found in the study that the institution didn’t have any regular care of individuals in any great extent, which is also consistent with what previous research have reported concerning Sweden’s care for the mentally deficient. The study further shows that the State Institution for Education of Feebleminded Girls was largely coloured by the perception of mentally deficient as a threat to society. It appears that the institution primarily focused upon the interests of society and therefore often reduced the individual's interests and autonomy.