Revisión sobre los aspectos biológicos del "fouling"

The development of fouling communities is object of world-wide research since the last half of the century. Biological fouling of vessels has been known since the beginning of man ’s maritime activities. Biological corrosión became a problem of concern when steel replaced wood as the primary ship construction material. The purpose of the present paper is to present a guide about biological aspects of fouling for the non-specialist (the non-biologist). The scope ofthis guide is to give some historical references, development sequences of the fouling community, abiotic factors influence, fouling problems, study methodology and enough elements to recognize the most important taxa with some pictures. Also, in relation to freshwater fouling, a basic approach and comments about exotic species introduction by ships are presented. A glossary and a broad bibliography on this subject are ineluded

Studies on biofouling at Mar del Plata harbor: monthly settlement of calcareous species along a year

Monthly settlement of calcareous species was followed in Mar del Plata harbor (Argentina) along a year. Large number of calcareous organisms recruited onto ceramic ponéis. Balanus amphitrite and Hydroides elegans were the most representative species settled on the primary space. Other bamacles, B. glándula + B improvisus followed in importance, but the number of recruits per panel was always low. All of them were measured and total occupied oreas estimated The species showéd different settlement cycles, different preferences by both depth levels and surface texture. The máximum peak of density for B. glándula + B improvisus was in December, for B amphitrite in February and for Hydroides elegans in March. Virtually no settlement took place during colder months (June-September). Bamacles preferred to settle on the back side of the panels, with grooves and pits, while serpulids showed no texture preferences. In relation with depth all species preferred to colonize the three deepest levels. Data corresponding to growth rotes indicated a rapid development during warmer months

The influence of different pathogens on the lysozyme activity into tissues of rat oral cavity

Aim: To determine action of the different pathogens on the lysozyme activity into tissues of oral cavity and serum.Methods: The lysozyme activities was determined into oral mucosa cheek, tongue gum and serum of 158 white rats (11 series experiments). The pathogens were used: atropine, protamine sulfat, indometacyn, bee poison, hydrasine sulfat, cytostatic cyclofosfan, lincomycin, lipopolysaccharide, composition of antibiotic and omeprasol for ACBTResults: The  whole of pathogens decreased lysozyme activity (mean in 1,6-2,5 times) into oral tissues and on 16 % into serum. The specific lowering of lysozyme activities (Δ%/mg pathogen) was low most for lipopolysaccharide, especially after oral application usage (exceeding was in tens times).Conclusion: The lysozyme activity lowering may play significant role in pathogenesis of stomatologic diseases/ Lipopolysaccharide (LPS) send lysozyme activity lowering most especially after oral application. Probably, the antilysozyme action of pathogens realize by LPS. The stomatogenic factor in pathogenesis and profilactic of noninfection diseases is important

Special Grain Boundary Self-Diffusion in BCC-Tungsten

Thermal stability of grain boundaries in tungsten has been studied by the method of molecular dynamics, and the coefficient of grain boundary self-diffusion for Σ11(332)[11 ̅0] and Σ3(112)[11 ̅0] boundaries has been calculated.Работа выполнена в рамках государственного задания Минобрнауки России (тема «Функция», номер госрегистрации г.р. № 122021000035-6). При проведении работ был использован суперкомпьютер «Уран» ИММ УрО РАН

FORMATION ENERGIES OF POINT DEFECTS IN GRAIN BOUNDARIES OF POLYCRYSTALLINE TUNGSTEN

Molecular-static simulation of grain boundaries in polycrystalline W has been carried out, and values of energy and width of boundaries for various misorientation angles have been calculated. Energies of formation of vacancies and interstitials have been obtained

ENERGETICALLY FAVORABLE CONFIGURATIONS OF SYMMETRIC TILT GRAIN BOUNDARIES IN TITANIUM(HCP)

Molecular static and molecular dynamic simulations symmetric tilt grain boundaries in hcp titanium were used to evaluated energetically favorable configurations. Grain boundary width is investigated by visualization atomistic simulation data

GRAIN BOUNDARY SELF-DIFFUSION IN NANOCRISTALLINE NIKEL

An atomistic simulation of grain boundaries (GBs) in Ni has been carried out in nanocrystalline state. The direct MD method was used to study the self-diffusion in GBs.Работа выполнена в рамках государственного задания Минобрнауки России (тема «Функция» номер госрегистрации г.р. № 122021000035-6). При проведении работ был использован суперкомпьютер «Уран» ИММ УрО РА

Special Grain Boundary Self-Diffusion in Nikel

An atomistic simulation of special tilt grain boundaries (GBs) in Ni has been carried out. The direct MD method was used to study the self-diffusion in GBs.Работа выполнена в рамках государственного задания Минобрнауки России (тема «Функция» номер госрегистрации г.р. № 122021000035-6). При проведении работ был использован суперкомпьютер «Уран» ИММ УрО РАН

New Particles Working Group Report of the Snowmass 2013 Community Summer Study

This report summarizes the work of the Energy Frontier New Physics working group of the 2013 Community Summer Study (Snowmass)