969 resultados para sp-equared sp2 sp^2 hybrid orbital


Relevância:

50.00% 50.00%

Publicador:

Resumo:

The modernization process has been introduced in the agricultural sector without any technical control. This process has provoked loss of food quality, serious damage to the worker's health and environmental degradation. The lack of technical assistance is total and farmers are not interested in the hazards involved. -after English summary

Relevância:

50.00% 50.00%

Publicador:

Resumo:

This work deals with net radiation (Q*) estimates as function of solar radiation (K↓) for the Jaboticabal region in Sao Paulo State. In the same way shows a comparison between measured and Penman estimates net radiations. The data were 207 pairs of net and solar radiation obtained in a net radiometer and a Eppley Piranometer. The results show a good agreement between Q* and K↓ for two periods: spring-summer and autumn-winter. The Penman's equation for Q* underestimates the values for any station with albedo of 0.25. -English summary

Relevância:

50.00% 50.00%

Publicador:

Resumo:

This paper deals with an integrated study concerning the evaluation of the coal deposit at Cerquilho (Sao Paulo State) in the upper part of the Tubarao Group. Palaeogeographical studies from other authors describe the genesis of these deposits as a deltaic system overlapped by a marine transgressive sequence. The study applied four methods for ore reserve estimation (isolines, blocks, polygones and triangles), besides statistical and geostatistical methodology. The technological characterization assays suggest the application for the coal in cement and ceramics industries. The applied methodology showed reserves estimated around 1 400 000 ton. The isolines method tend to underestimate the amount of coal, on the other hand, the kriging method shows a tendency to overestimate the results. The data from the polygonal method are closest to mean values. For the thickness estimation the results close to the mean values are those from the isolines. -after English summary

Relevância:

50.00% 50.00%

Publicador:

Resumo:

This paper reports the composition change of the dmf-teeth index, outcome from dental health program for the 3 to 6 year old pre-school children population, enrolled in kindergartens in Araraquara-SP, in 1988. The program performance promotes a major contribution of the f component to the dmf-teeth index.

Relevância:

50.00% 50.00%

Publicador:

Resumo:

Migmatites, high-grade gneisses and granitoids represent the most important Precambrian rocks of Sao Joao da Boa Vista region. Structures are interpreted as due to low-angle oblique non-coaxial ductile shear, developed under conditions of amphibolite facies. Transcurrent ductile shear zones and associated drags modify the foliation and lineations orientations. A first phase of migmatization related to anatexis seems to be developed before or early during the thermo-tectonic process. A second one is syntectonic, and represents the main regional phase. Joints and faults represent the brittle features, the faults marked by cataclastic rocks and intense retrometamorphism along the main zones. -from English summary

Relevância:

50.00% 50.00%

Publicador:

Resumo:

The results indicated potassium as the most important for the discrimination between groups of samples, followed by magnesium, calcium and sodium. As the area has been under intense sugar cane industrialisation, the soil and the river waters of the region receive a high content of vinasse rich in potassium. -from English summary

Relevância:

50.00% 50.00%

Publicador:

Resumo:

Fluid inclusions, petrofabric and microstructures studies of mylonites and cataclasites were used to establish the Itu-Jundiuvira Shear Zone (IJSZ) tectonic and metamorphic evolution. The quartz fabric indicates that prism {1000} slip was important during the deformation. This studies have showed that IJSZ changed from deeper crustal levels (12-15km) and ductile conditions to upper levels of about 4 to 6km and brittle strain conditions. -English summary

Relevância:

50.00% 50.00%

Publicador:

Resumo:

The Itaqui Granitoid Complex is a drop shaped WNW-ESE trending intrusion with its head' at west. Its contacts with the low-grade metamorphic rocks of the Sao Roque Group are intrusive at west, northwest, north and northeast, and tectonic at south and northeast. The complex is built up by four main intrusive phases which characterize a rising and unroofing process. Petrographically the Itaqui granite comprises five distinct magmatic associations in nine igneous units. -from English summary

Relevância:

50.00% 50.00%

Publicador:

Resumo:

Trichomonas vaginalis is the flagellate that causes trichomonadiasis, a sexually transmitted disease. Immunological methods have been proposed for the study of antigenic characterization using strains isolated from different patients. This work compares protease profiles from the different strains using gelatin containing polyacrylamide gels to analyse the protease activity. High molecular weight proteases (20 to 100 kDa) were found on gels showing quantitative differences. Human IgG antiproteases were detected by immunoblotting using the same extracts. These proteases could be related with T. vaginalis pathogenesis.

Relevância:

50.00% 50.00%

Publicador:

Resumo:

A scorpion control program was proposed for the town of Aparecida (SP), an endemic region of Tityus serrulatus. Clusters of scorpions in urban and rural areas, environmental degradation of the town's outskirts and new scorpion procreation and dispersal habitats were studied. In addition, infrastructure problems such as the disposal and collection of residential and municipal refuse, sanitation (sewage and storm sewer), condition of vacant lots and constructions in the urban area were evaluated. After an epidemiological study, educational measures such as the distribution of pamphlets, cleaning group work, visits to residences and cooperation from High School teachers and students were also suggested. Chemical control was indicated in high-risk sites, especially those of near-school buildings. Furthermore, the use of natural predators was also mentioned within the present sanitation regulations for urban areas. The authors assert that these procedures must be integrated and continued uninterruptedly for several years. They also suggest a collaborative work with those responsible for the dengue eradication program, as well as the institution of the scorpion study week, which would greatly contribute to the education of the population, to preventive programs and to scorpion control.

Relevância:

50.00% 50.00%

Publicador:

Resumo:

Milk can be an important spreading vehicle of pathogenic agents mainly for young children who are an important group of milk consumers. 135 milk samples (77 of raw milk and 58 of pasteurized milk) were analysed in order to verify the number of heterotrophic bacteria, of Staphylococcus aureus and of total coliforms, as well as to determine presence of Salmonella, Shigella, enteropathogenic Escherichia coli (EPEC) and enteroinvasive Escherichia coli (EIEC). The results were negative for Salmonella, Shigella and EIEC. EPEC serotypes 0:28, 0:111 and 0:55 were isolated in 4 of raw milk samples. The heterotrophic bacteria was found in counts over 30.000 UFC/mL in 91%, 25% and 68,75% respectively of raw milk, milk grade B and grade C. Counts over 30.000 coliforms/mL were found in 70,13%, 6,25% and 6,24% of the raw milk, B and C, respectively. 32,40% of the raw milk had counts of S. aureus over 3.000 UFC/mL.

Relevância:

50.00% 50.00%

Publicador:

Resumo:

The experiment was carried out to evaluate seven accessions of limpograss Hermathria altissima (PI 364888, NO 158, PI 364863, IPEACO 336, UF 553, UF 347238, and IPEACO 337) as compared to coast-cross grass (Cynodon dactylon), to determine which grasses were best adapted ecologically to conditions at Pindamonhangaba. The experimental design was a randomized block with four replications. Five annual harvests were taken during the three-year experimental period, two in the dry season and three in the rainy season. The higher annual DM yields (kgDM/ ha) were obtained with accessions UF 553 (19996), NO 158 (18745), and PI 347238 (18267). Accessions UF 553 and IPEACO 336 had the most uniform production throughout the year with 37.4 and 33.2% during the dry season, respectively. Coast-cross had the highest percentage of crude protein (10.30%), while limpograss values varied around 7%. It was concluded that accession UF553 was the most promising grass for the Pindamonhangaba region.

Relevância:

50.00% 50.00%

Publicador:

Resumo:

In a previous work a strain of microorganism was isolated in Araraquara region, SP, Brazil, and characterized as being Streptomyces sp. Ar386, producer of 26-deoxylaidlomycin and of more three polietheric antibiotics. In this paper there are presented studies about fermentation characteristics of the antibiotic performed in incubator agitator utilizing various cultivation technics and media. A medium containing part of energy source as free sugar and part as amilaceous material presented the best result. As the Streptomyces sp. Ar386 produced few spores, it was necessary special care to provide sufficient quantity of microorganisms in inoculation. The biosynthesis of antibiotics intensified between the forth and seventh day. The yields varied from 8 to 443 mg of antibiotic complex per litre of medium. As a polyether antibiotic it may be used as anticoccidal agent in poultry and as growth promoters in cattle and swine.