|
|
|
|
|
| Scher,Ricardo; Pompolo,Silvia das Graças. |
| Cytogenetic analysis based on the distribution of C-bands showed two groups of karyotypes in a Trypoxylon nitidum population from the Rio Doce Park, State of Minas Gerais, Brazil. One of these groups, that was identical to a previously described karyotype (n = 15; 2n = 30), had a stable chromosome number and was rich in acrocentric chromosomes, whereas the other had a variable chromosome number (n = 12 to 14; 2n = 25 to 28) and was rich in pseudo-acrocentric chromosomes. We propose a hypothesis explaining the dynamics of the modifications which occurred in the karyotype of this species, based on the minimum interaction theory of Imai et al. (1986, 1988, 1994) and on the chromosome rearrangements and heteromorphisms observed by us. |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: C-banding; Trypoxylon nitidum; Karyotype evolution. |
| Ano: 2003 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572003000300015 |
| |
|
|
| Bomfim,Kátia Michelle dos Anjos; Garcia,Carlos Alexandre Borges; Reis,Francisco Prado; Palmeira,José Arnaldo Vasconcelos; Scher,Ricardo; de Lucca Júnior,Waldecy; Aragão,José Adeval; Vasconcelos,Francis Lima; Albuquerque Júnior,Ricardo Luiz Cavalcanti; Feitosa,Vera Lúcia Corrêa. |
| Lead is one of the heavy metals most used in industry. Poisoning due to long-term lead exposure is known as saturnism, and is an occupational illness that has been known for many years. Lead is highly toxic and can compromise the structural and functional patterns of organs and systems. The aim of this study was to examine the lungs and kidneys of fetuses from female Wistar rats exposed to lead acetate. In this study, the lungs and kidneys of 20 fetuses from female rats that had previously been treated with lead acetate were dissected, fixed, embedded in paraffin and stained with hematoxylin and eosin. Macroscopic changes to the shape, color and consistency of organs from fetuses treated with this heavy metal were observed, in comparison with organs from... |
| Tipo: Journal article |
Palavras-chave: Lead acetate; Fetuses; Lung; Kidney. |
| Ano: 2012 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-95022012000100021 |
| |
|
|
| Farias-Junior,Paulo A; Rios,Marcos C; Moura,Tauanny A; Almeida,Roque P; Alves,Pericles B; Blank,Arie F; Fernandes,Roberta P M; Scher,Ricardo. |
| Leishamaniasis is a disease that affects more than 2 million people worldwide, whose causative agent is Leishmania spp. The current therapy for leishmaniasis is far from satisfactory. All available drugs, including pentavalent antimony, require parenteral administration and are potentially toxic. Moreover, an increase in clinical resistance to these drugs has been reported. In this scenario, plant essential oils used traditionally in folk medicine are emerging as alternative sources for chemotherapeutic compounds. In this study, in vitro leishmanicidal effects of a thymol- and a carvacrol-rich essential oil from leaves of Lippia sidoides Cham. were investigated. The essential oils were extracted and their constituents were characterized by gas... |
| Tipo: Journal article |
Palavras-chave: Carvacrol; P-cymene; Essential oil composition; Leishmania chagasi; Lippia ssp.; Thymol; Verbenaceae. |
| Ano: 2012 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-97602012000400012 |
| |
|
| |
|
|
|
