Sazonalidade das proteínas seminais de caprinos da raça Anglo-nubiana no Nordeste do Brasil.

Resumo: As proteínas seminais já são estudadas em várias espécies, entre elas a bovina, eqüina, e suína, mostrando influência sobre a qualidade e congelabilidade do sêmen, e, como conseqüência, na fertilidade dos machos. No entanto, estudos das proteínas seminais em caprinos ainda é incipiente. O objetivo desse trabalho foi identificar o perfil protéico do plasma seminal de caprinos da raça Anglo-nubiana nas épocas seca e chuvosa na região semi-árida do Nordeste do Brasil. [Seasonality of seminal proteins from Anglo-Nubian goats in Northeast of Brazil

1D mapping of seminal plasma proteins in Anglo-Nubian goats.

The lack of information about seasonal variation of seminal plasma proteins in goats from Northeast Brazil led us to investigate the protein band distribution throughout the year. The experiment lasted one year (from April 2006 to March 2007) in which 230 semen collections from five adult goats (Capra hircus) were carried out, at ages ranging from 18 to 22 months, weighing 42.0 ± 10.0 kg, belonging to Anglo Nubian breed. A pool of seminal plasma samples from all the animals in each month of the year was submitted to 1D electrophoresis SDS-PAGE, 12.5%. The gels were analyzed through Life Science Software from UVP, Inc®. The correlation between air humidity and total seminal plasma proteins was not significant (r = -0.24; P > 0.05), while a moderate and significant correlation was found between temperature and total protein (r = 0.39; P 0.05). The analyzed gels showed a high frequency of molecular mass bands below 50 kDa throughout the year, followed by protein bands from 50 to 100 kDa. The major numbers of bands occurred in October and November, while May was the month that presented a smaller number of protein bands. The molecular bands of 14, 22, 24, 40, 55 and 66 kDa were present in all the months of the year. The band of 16 kDa was found in 41.7% of the months. May was the only month that did not show the 30 kDa. August and September did not present the bands of 34 and 35 kDa, while October showed both bands. The 45 kDa band was found in 75% of the months, being present in January, May, July, September and November. The 46 kDa band was identified in June and August, while the 47 kDa was identified in April. The 70 kDa band was identified from May to November (58.3%), the 72 kDa band was found in January, March and April (25%) and bands of 92 to 97 kDa were found from April to December (75%). These results showed a band distribution variation throughout the year in the Anglo Nubian goat breed in the semi-arid area of Brazil. It is concluded that medium rainfall or water scarcity in the dryer months seems to promote variation in semen volume and concentration and total protein distribution throughout the year. As no month variation was observed in semen motility and vigor, and protein bands probably related to fertility showed an uniform distribution throughout the year, it is suggested that there is no fertility variation during the year in Anglo-Nubian goats the semi-arid region.Meta 2010

Landau Analog Levels for Dipoles in the Noncommutative Space and Phase Space

In the present contribution we investigate the Landau analog energy quantization for neutral particles, that possesses a nonzero permanent magnetic and electric dipole moments, in the presence of an homogeneous electric and magnetic external fields in the context of the noncommutative quantum mechanics. Also, we analyze the Landau--Aharonov--Casher and Landau--He--McKellar--Wilkens quantization due to noncommutative quantum dynamics of magnetic and electric dipoles in the presence of an external electric and magnetic fields and the energy spectrum and the eigenfunctions are obtained. Furthermore, we have analyzed Landau quantization analogs in the noncommutative phase space, and we obtain also the energy spectrum and the eigenfunctions in this context.Comment: 20 pages, references adde

Variação sazonal dos picos cromatográficos das proteínas com afinidade à heparina no plasma seminal de caprinos Moxotó.

[Seasonal variation of the chromatographic proteins peaks with heparin affinity in Moxotó goat seminal plasma]

Electrostatic self-force in (2+1)-dimensional cosmological gravity

Point sources in (2+1)-dimensional gravity are conical singularities that modify the global curvature of the space giving rise to self-interaction effects on classical fields. In this work we study the electrostatic self-interaction of a point charge in the presence of point masses in (2+1)-dimensional gravity with a cosmological constant.Comment: 9 pages, Late

Influência dos períodos, seco e chuvoso, sobre os parâmetros clínicos em caprinos das raças Canindé e Moxotó.

Os caprinos têm um sistema de termorregulação que visa manter a temperatura corporal constante dentro de certos limites, independente da temperatura ambiente. Quando esses limites são estabelecidos, eles são usados em diversos mecanismos fisiológicos para manter a temperatura corporal (TC) dentro dos limites normais. Assim, a produção animal pode diminuir devido ao estresse térmico causado por temperaturas elevadas, especialmente em áreas semi-áridas como o Nordeste do Brasil. Este trabalho teve como objetivo avaliar o comportamento fisiológico de diferentes grupos genéticos de caprinos nativos de acordo com a resposta fisiológica das varáveis temperatura retal (TR), frequência respiratória (FR), batimentos cardíacos (BC) e movimentos ruminais (MR), e estabelecer os parâmetros fisiológicos para estas raças sob as condições do semiárido do Nordeste do Brasil. Foram selecionados aleatoriamente 30 animais, sendo cinco machos e dez fêmeas da raça Canindé e cinco machos e dez fêmeas da raça Moxotó, dos quais foram aferidos as variáveis BC, FR e TR nos meses de abril e setembro/2007 e 2008. Observou-se influência significativa (P<0,05) do período do ano no BC, na FR e na TR na raça Canindé, sendo observados valores mais elevados de BC e TR no período chuvoso. Na raça Moxotó observou-se uma diferença significativa (P<0,05) quanto ao BC e TR entre os períodos estudados, sendo observadas na estação seca maiores valores para estas variáveis. Também se observou nesta raça, uma correlação negativa (47%) entre a temperatura ambiente (TA) e TR no período seco, enquanto que no período chuvoso, essa correlação foi positiva (28%). A correlação entre TA e BC foi negativa (21%) no período chuvoso e, positiva (25%) no período seco. Na raça Canindé observou-se correlação negativa (39%) entre TA e movimento ruminal (MR) na época chuvosa, enquanto que no período seco, essa correlação foi positiva (33%). Os parâmetros clínicos avaliados neste estudo encontram-se dentro da normalidade para a espécie caprina no semi-árido nordestino e a raça Moxotó apresentou comportamento condizente com uma maior tolerância ao clima da região e um maior grau de adaptabilidade. Influence of the dry and rainy periods on clinical parameters in Canindé and Moxotó goat. Goats have a thermoregulatory system which maintains a constant body temperature within certain limits regardless the room temperature. When these limits are established, they are used in various physiological mechanisms maintaining body temperature within normal limits. Thus the animal production may fall due to thermal stress caused by high temperatures, especially in tropical areas like Northeast of Brazil. This work aimed to evaluate the physiological behavior from different goats genetic groups through physiological answers of rectal temperature (RT), respiratory frequency (RF), heart beat (HB) and ruminal movements (RM) and also to establish the physiological values for these breeds under semi arid conditions from Northeast of Brazil. It was randomly selected 30 animals, five males and ten females Canindé and five males and ten females Moxotó breed. It was obtained the HB, RF and RT in April and September/2007 and 2008. It was observed a significant influence (P<0.05) of the period of the year on HB, RF and RT in Canindé breed, being observed higher values of HB and RT in the rainy period. In Moxotó it was observed a significant difference (P <0.05) in HB and RT between the periods studied, being observed in the dry season the highest HB and RT. The correlation between air temperature (AT) and RT was negative (47%) in the dry period to Moxotó, whereas in the rainy season the correlation was positive (28%). Also the correlation between AT and HB was negative (21%) in the rainy period and positive (25%) in the dry season. In Canindé breed it was observed negative correlation (39%) between AT and RM in the rainy season, while in the dry period this correlation was positive (33%). According to this study the clinical parameters are within the normal range for the goat specie in the Northeast semi-arid and the Moxotó breed showed a pattern consistent with better tolerance to the regional climate and a higher degree of adaptability