228 research outputs found
Synthesis and spectroscopic characterization of Ru(II) and Sn(IV)-porphyrins supramolecular complexes
Copyright Β© 2014 Published by Elsevier B.V. All rights reserved. Synthesis and NMR studies of Ru(II) and Sn(IV) tetraphenylporphyrins supramolecular complexes were carried out. The diffusion coefficients of the complexes, porphyrinates, and solvents were determined by DOSY NMR spectroscopy. By the method of spectrophotometric titration a binding ability of Ru(II) tetraphenylporphyrin towards 4-(imidazol-1-yl)-phenol was investigated, stability constant of resulting complexes and concentration intervals of their existence were defined. Crow
O processo de reformulação curricular de duas faculdades de Medicina no Brasil e na Argentina: uma abordagem comparativa
The fraction of cancer attributable to ways of life, infections, occupation, and environmental agents in Brazil in 2020
Many human cancers develop as a result of exposure to risk factors related to the environment and ways of life. The aim of this study was to estimate attributable fractions of 25 types of cancers resulting from exposure to modifiable risk factors in Brazil. The prevalence of exposure to selected risk factors among adults was obtained from population-based surveys conducted from 2000 to 2008. Risk estimates were based on data drawn from metaanalyses or large, high quality studies. Population-attributable fractions (PAF) for a combination of risk factors, as well as the number of preventable deaths and cancer cases, were calculated for 2020. The known preventable risk factors studied will account for 34% of cancer cases among men and 35% among women in 2020, and for 46% and 39% deaths, respectively. The highest attributable fractions were estimated for tobacco smoking, infections, low consumption of fruits and vegetables, excess weight, reproductive factors, and physical inactivity. This is the first study to systematically estimate the fraction of cancer attributable to potentially modifiable risk factors in Brazil. Strategies for primary prevention of tobacco smoking and control of infection and the promotion of a healthy diet and physical activity should be the main priorities in policies for cancer prevention in the country. \ua9 2016 Azevedo e Silva et al. This is an open access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited
Familial aggregation of breast/ovarian cancer: age of onset along subsequent generations in Brazil
ΠΠΎΠ΄ΠΈΡΠΈΠΊΠ°ΡΠΈΡ Π²ΠΎΠ΄Π½ΡΡ ΠΏΠΎΠ»ΠΈΠΌΠ΅ΡΠ½ΡΡ ΠΊΠΎΠΌΠΏΠΎΠ·ΠΈΡΠΈΠΉ Π΄Π»Ρ ΡΠ»Π΅ΠΊΡΡΠΎΠΎΡΠ°ΠΆΠ΄Π΅Π½ΠΈΡ ΠΌΠ΅ΡΠ°Π»Π»ΠΎΠΏΠΎΡΡΠΈΡΠΈΠ½Π°ΠΌΠΈ
It is known that coatings produced by electrodeposition, cured at high temperatures (180ΒΊC and above).The aim of this study is reducing the energy intensity of production of polymer coatings, improving physical, mechanical properties of the polymer coatings and expansion of colors of paints for the electrodeposition. As the object of study was chosen lacquer KCh-0125, the main component of which is maleated polybutadiene. A micelle of film-forming neutralized tertiary amine is a colloidal particle size of 40 to 70 nm. One of the most effective and lowcost ways to the above problems is the introduction of the water-based oligomeric compositions hydrophobic modifiers. As modifiers were selected naturally occurring metalloporphyrins - cobalt (II) complex of pheophytin a (Π‘ΠΎPh) and copper (II) complex of methylpheophorbide a (CuMPP). The method of introduction of the Π‘ΠΎPh and the CuMPP of the water-based compositions for electrodeposition was developed. Colloid-chemical properties of the resulting compositions were studied. It was presented the most probable structure of the scheme colloidal particles modified by metalloporphyrins. It was conducted viscometric, spectral studies; the method of dynamic light scattering was used to determine the zeta potential and the size of colloidal particles. It was demonstrated high catalytic activity of metal complexes of porphyrins examined in structuring processes electrodeposited coatings when cured. Introduction of metalloporphyrins in the coating helps to reduce the curing temperature to 160Β°C. This makes it possible to reduce or duration, or a temperature curing coatings. The introduction of CuMPP make possible to obtain transparent coatings emerald green. Modified electrodeposited coatings also have good water and salt resistance.ΠΠ»Π΅ΠΊΡΡΠΎΠΎΡΠ°ΠΆΠ΄Π΅Π½ΠΈΠ΅ - ΡΠΊΠΎΠ»ΠΎΠ³ΠΈΡΠ΅ΡΠΊΠΈ ΡΠΈΡΡΡΠΉ ΠΌΠ΅ΡΠΎΠ΄ ΠΏΠΎΠ»ΡΡΠ΅Π½ΠΈΡ Π»Π°ΠΊΠΎΠΊΡΠ°ΡΠΎΡΠ½ΡΡ
ΠΏΠΎΠΊΡΡΡΠΈΠΉ ΠΈΠ· Π²ΠΎΠ΄ΠΎΡΠ°Π·Π±Π°Π²Π»ΡΠ΅ΠΌΡΡ
Π»Π°ΠΊΠΎΠΊΡΠ°ΡΠΎΡΠ½ΡΡ
ΠΌΠ°ΡΠ΅ΡΠΈΠ°Π»ΠΎΠ². ΠΠΎΠ΄ΠΎΡΠ°Π·Π±Π°Π²Π»ΡΠ΅ΠΌΡΠ΅ ΠΎΠ»ΠΈΠ³ΠΎΠΌΠ΅ΡΠ½ΡΠ΅ ΠΏΠ»Π΅Π½ΠΊΠΎΠΎΠ±ΡΠ°Π·ΠΎΠ²Π°ΡΠ΅Π»ΠΈ Π½Π° ΠΎΡΠ½ΠΎΠ²Π΅ Π»Π°ΠΊΠ° ΠΠ§-0125 Π΄Π»Ρ Π°Π½ΠΎΠ΄Π½ΠΎΠ³ΠΎ ΡΠ»Π΅ΠΊΡΡΠΎΠΎΡΠ°ΠΆΠ΄Π΅Π½ΠΈΡ ΡΠ²Π»ΡΡΡΡΡ ΠΏΠΎΠ»ΠΈΡΠ»Π΅ΠΊΡΡΠΎΠ»ΠΈΡΠ°ΠΌΠΈ. ΠΡ
Π²ΠΎΠ΄Π½ΡΠ΅ ΡΠ°ΡΡΠ²ΠΎΡΡ Π² Π΄ΠΈΠ°ΠΏΠ°Π·ΠΎΠ½Π΅ ΡΠ°Π±ΠΎΡΠΈΡ
Π·Π½Π°ΡΠ΅Π½ΠΈΠΉ ΠΊΠΎΠ½ΡΠ΅Π½ΡΡΠ°ΡΠΈΠΈ ΠΈ Π²Π΅Π»ΠΈΡΠΈΠ½Ρ ΡΠ ΠΈΠΌΠ΅ΡΡ ΠΊΠΎΠ»Π»ΠΎΠΈΠ΄Π½ΡΡ ΠΏΡΠΈΡΠΎΠ΄Ρ. ΠΠΎΠΊΡΡΡΠΈΡ, ΠΏΠΎΠ»ΡΡΠ΅Π½Π½ΡΠ΅ ΡΠ»Π΅ΠΊΡΡΠΎΠΎΡΠ°ΠΆΠ΄Π΅Π½ΠΈΠ΅ΠΌ, ΠΎΡΠ²Π΅ΡΠΆΠ΄Π°ΡΡΡΡ ΠΏΡΠΈ ΡΠ΅ΠΌΠΏΠ΅ΡΠ°ΡΡΡΠ°Ρ
180ΒΊΠ‘ ΠΈ Π²ΡΡΠ΅. ΠΠΎΠ΄ΠΈΡΠΈΠΊΠ°ΡΠΈΡ ΡΠΊΠ°Π·Π°Π½Π½ΡΡ
ΠΌΠ°ΡΠ΅ΡΠΈΠ°Π»ΠΎΠ² Π½Π΅ΡΠ°ΡΡΠ²ΠΎΡΠΈΠΌΡΠΌΠΈ Π² Π²ΠΎΠ΄Π΅ ΠΌΠ΅ΡΠ°Π»Π»ΠΎΠΏΠΎΡΡΠΈΡΠΈΠ½Π°ΠΌΠΈ ΠΏΡΠΈΡΠΎΠ΄Π½ΠΎΠ³ΠΎ ΠΏΡΠΎΠΈΡΡ
ΠΎΠΆΠ΄Π΅Π½ΠΈΡ (ΠΊΠΎΠ±Π°Π»ΡΡΠΎΠ²ΡΠΉ (II) ΠΊΠΎΠΌΠΏΠ»Π΅ΠΊΡ ΡΠ΅ΠΎΡΠΈΡΠΈΠ½Π° Π° ΠΈ ΠΌΠ΅Π΄Π½ΡΠΉ (II) ΠΊΠΎΠΌΠΏΠ»Π΅ΠΊΡ ΠΌΠ΅ΡΠΈΠ»ΡΠ΅ΠΎΡΠΎΡΠ±ΠΈΠ΄Π° Π°) ΠΏΠΎΠ·Π²ΠΎΠ»ΡΠ΅Ρ ΠΏΡΠΎΠ²ΠΎΠ΄ΠΈΡΡ ΡΡΡΡΠΊΡΡΡΠΈΡΠΎΠ²Π°Π½ΠΈΠ΅ ΠΏΠΎΠ»ΡΡΠ΅Π½Π½ΡΡ
ΠΏΠΎΠΊΡΡΡΠΈΠΉ ΠΏΡΠΈ ΠΏΠΎΠ½ΠΈΠΆΠ΅Π½Π½ΡΡ
ΡΠ΅ΠΌΠΏΠ΅ΡΠ°ΡΡΡΠ°Ρ
ΠΈΠ»ΠΈ ΠΏΡΠΈ ΠΌΠ΅Π½ΡΡΠ΅ΠΉ ΠΏΡΠΎΠ΄ΠΎΠ»ΠΆΠΈΡΠ΅Π»ΡΠ½ΠΎΡΡΠΈ. ΠΡΡΠ»Π΅Π΄ΠΎΠ²Π°Π½ΠΈΡ ΠΊΠΎΠ½ΡΠ΅Π½ΡΡΠ°ΡΠΈΠΎΠ½Π½ΡΡ
Π·Π°Π²ΠΈΡΠΈΠΌΠΎΡΡΠ΅ΠΉ ΠΈΠ·ΠΌΠ΅Π½Π΅Π½ΠΈΡ Π²Π΅Π»ΠΈΡΠΈΠ½ ΞΆ-ΠΏΠΎΡΠ΅Π½ΡΠΈΠ°Π»Π°, ΡΠ ΡΠ°ΡΡΠ²ΠΎΡΠ° ΠΈ ΠΏΡΠΈΠ²Π΅Π΄Π΅Π½Π½ΠΎΠΉ Π²ΡΠ·ΠΊΠΎΡΡΠΈ Ξ·ΡΠ΄/Ρ ΠΌΠΎΠ΄ΠΈΡΠΈΡΠΈΡΠΎΠ²Π°Π½Π½ΡΡ
ΠΊΠΎΠΌΠΏΠΎΠ·ΠΈΡΠΈΠΉ ΠΏΠΎΠΊΠ°Π·Π°Π»ΠΈ, ΡΡΠΎ ΠΎΠ½ΠΈ ΠΈΠΌΠ΅ΡΡ Π²ΠΈΠ΄, ΡΠΈΠΏΠΈΡΠ½ΡΠΉ Π΄Π»Ρ ΠΊΠΎΠ»Π»ΠΎΠΈΠ΄Π½ΡΡ
ΡΠΈΡΡΠ΅ΠΌ. ΠΡΠ΅Π΄Π»ΠΎΠΆΠ΅Π½Π° Π½Π°ΠΈΠ±ΠΎΠ»Π΅Π΅ Π²Π΅ΡΠΎΡΡΠ½Π°Ρ ΡΡ
Π΅ΠΌΠ° ΡΡΡΠΎΠ΅Π½ΠΈΡ ΠΌΠΈΡΠ΅Π»Π»Ρ ΠΌΠΎΠ΄ΠΈΡΠΈΡΠΈΡΠΎΠ²Π°Π½Π½ΠΎΠ³ΠΎ ΠΏΠ»Π΅Π½ΠΊΠΎΠΎΠ±ΡΠ°Π·ΠΎΠ²Π°ΡΠ΅Π»Ρ
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