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1.
Braz. j. med. biol. res ; 40(1): 81-87, Jan. 2007. tab
Article in English | LILACS | ID: lil-439672

ABSTRACT

The long-term effects of low-level lead intoxication are not known. The sympathetic skin response (SSR) was evaluated in a group of 60 former workers of a primary lead smelter, located in Santo Amaro, BA, Brazil. The individuals participating in the study were submitted to a clinical-epidemiological evaluation including questions related to potential risk factors for intoxication, complaints related to peripheral nervous system (PNS) involvement, neurological clinical examination, and also to electromyography and nerve conduction studies and SSR evaluation. The sample consisted of 57 men and 3 women aged 34 to 69 years (mean ± SD: 46.8 ± 6.9). The neurophysiologic evaluation showed the presence of lumbosacral radiculopathy in one of the individuals (1.7 percent), axonal sensorimotor polyneuropathy in 2 (3.3 percent), and carpal tunnel syndrome in 6 (10 percent). SSR was abnormal or absent in 12 cases, representing 20 percent of the sample. More than half of the subjects (53.3 percent) reported a history of acute abdominal pain requiring hospitalization during the period of work at the plant. A history of acute palsy of radial and peroneal nerves was reported by about 16.7 and 8.3 percent of the individuals, respectively. Mean SSR amplitude did not differ significantly between patients presenting or not the various characteristics in the current neurological situation, except for diaphoresis. The results suggest that chronic lead intoxication induces PNS damage, particularly affecting unmyelinated small fibers. Further systematic study is needed to more precisely define the role of lead in inducing PNS injury.


Subject(s)
Humans , Male , Female , Adult , Middle Aged , Galvanic Skin Response/drug effects , Lead/toxicity , Neural Conduction/drug effects , Occupational Exposure/adverse effects , Peripheral Nervous System Diseases/chemically induced , Sympathetic Nervous System/drug effects , Electromyography , Peripheral Nervous System Diseases/diagnosis , Reaction Time , Risk Factors , Time Factors
2.
Genet. mol. res. (Online) ; 6(1): 59-66, 2007. ilus, tab
Article in English | LILACS | ID: lil-456751

ABSTRACT

In the present study, we report on the case of a 43-year-old male patient seeking for fertility assistance, who showed a seminal analysis and testicular biopsy of complete azoospermia. Peripheral blood culture for chromosome studies revealed a karyotype of 46 chromosomes with a ring-Y-chromosome that lost the long arm heterochromatin. Molecular analysis of genomic DNA from the patient detected the presence of the sex-determining region of the Y-chromosome (SRY) but the complete absence of regions involved in spermatogenesis (AZFa, AZFb, AZFc). Several molecular markers distributed along the Y-chromosome were tested through PCR amplification, and a breakpoint was established close to the centromere, predicting the deletion of the growth control region, in agreement with the short stature observed in this patient. All results obtained through molecular cytogenetic characterization are in accordance with the clinical features observed in this patient.


Subject(s)
Humans , Male , Adult , Azoospermia/genetics , Chromosomes, Human, Y/genetics , Ring Chromosomes , Sex Chromosome Aberrations , DNA , Cytogenetic Analysis , Genetic Markers/genetics , Polymerase Chain Reaction
3.
Arq. bras. med. vet. zootec ; 58(4): 642-647, ago. 2006. tab, graf
Article in Portuguese, English | LILACS | ID: lil-438736

ABSTRACT

Por meio de simulações, compararam-se os dados de rentabilidade do sistema de produção de uma propriedade rural localizada em Nepomuceno, MG, considerando duas situações: a primeira, real, produz queijo, e a segunda, simulada, vende leite para o laticínio. A produção e a comercialização de queijo mostraram-se mais rentáveis que a comercialização do leite in natura, representando uma alternativa para o incremento da renda do produtor de leite.


It was performed a simulation in order to compare the profitability of a cheese producer dairy farm, located in Nepomuceno city, Minas Gerais state. According to the simulation, data of the production system were compared in two different situations: cheese production (real) and selling milk to dairy. The cheese production and marketing was more profitable than milk selling, representing an alternative to increase the productorÆs income.


Subject(s)
Commerce , Food Production , Milk/economics , Cheese/economics
4.
Arq. bras. med. vet. zootec ; 57(4): 485-493, ago. 2005. tab
Article in Portuguese | LILACS | ID: lil-415189

ABSTRACT

Estudou-se a rentabilidade da atividade leiteira na região de Lavras, MG, analisando a influência do nível tecnológico sobre o custo de produção do leite. Foram identificados os componentes com maior influência sobre os custos finais da atividade e calculado o ponto de equilíbrio. Os dados, provenientes de 16 sistemas de produção, representando os níveis tecnológicos baixo, médio e alto, foram coletados mensalmente, entre janeiro de 2002 e junho de 2003. Consideraram-se a margem bruta, a margem líquida e o resultado (lucro ou prejuízo) como indicadores de eficiência econômica. O nível tecnológico influenciou o custo total de produção do leite - lucratividade e rentabilidade. Os sistemas de produção com nível tecnológico baixo apresentaram o menor custo unitário. O nível tecnológico influenciou os itens componentes do custo operacional efetivo da atividade leiteira. A margem líquida positiva e a lucratividade negativa, nos três níveis tecnológicos, indicaram que os pecuaristas estarão se descapitalizando a longo prazo, mas não a médio prazo.


Subject(s)
Cost Control/statistics & numerical data , Economics , Milk/economics , Milk/statistics & numerical data , Food Production/economics
5.
Genet. mol. res. (Online) ; 3(1): 167-180, Mar. 2004.
Article in English | LILACS | ID: lil-417575

ABSTRACT

Chromobacterium violaceum is a Gram-negative beta-proteobacterium that inhabits a variety of ecosystems in tropical and subtropical regions, including the water and banks of the Negro River in the Brazilian Amazon. This bacterium has been the subject of extensive study over the last three decades, due to its biotechnological properties, including the characteristic violacein pigment, which has antimicrobial and anti-tumoral activities. C. violaceum promotes the solubilization of gold in a mercury-free process, and has been used in the synthesis of homopolyesters suitable for the production of biodegradable polymers. The complete genome sequence of this organism has been completed by the Brazilian National Genome Project Consortium. The aim of our group was to study the DNA repair genes in this organism, due to their importance in the maintenance of genomic integrity. We identified DNA repair genes involved in different pathways in C. violaceum through a similarity search against known sequences deposited in databases. The phylogenetic analyses were done using programs of the PHILYP package. This analysis revealed various metabolic pathways, including photoreactivation, base excision repair, nucleotide excision repair, mismatch repair, recombinational repair, and the SOS system. The similarity between the C. violaceum sequences and those of Neisserie miningitidis and Ralstonia solanacearum was greater than that between the C. violaceum and Escherichia coli sequences. The peculiarities found in the C. violaceum genome were the absence of LexA, some horizontal transfer events and a large number of repair genes involved with alkyl and oxidative DNA damage


Subject(s)
Chromobacterium/genetics , Bacterial Proteins/genetics , DNA Repair/genetics , Sequence Homology , Databases, Genetic , Phylogeny , Base Pair Mismatch/genetics , Recombination, Genetic , SOS Response, Genetics/genetics
6.
Rev. méd. Minas Gerais ; 5(1): 17-22, jan.-mar. 1995. tab
Article in Portuguese | LILACS | ID: lil-161786

ABSTRACT

As proporçöes pandêmicas que vem atingindo a disseminaçäo da AIDS provocaram, na populaçäo médica e leiga, uma crescente conscientizaçäo sobre os riscos envolvidos em hemoterapia, trazendo, em consequência, uma maior atençäo para outros efeitos deletérios, como a transmissäo de doenças diversas, bem como reaçöes pós-transfusionais de fundo imunológico. Em virtude desta, as pesquisas em hemoterapia voltaram-se para diversas técnicas que visam a evitar transfusöes homólogas. Associaçöes sinérgicas dessas técnicas säo atualmente revistas, propostas e investigadas, com revisäo de limites teóricos, antes considerados intransponíveis. Este estudo apresenta uma rápida revisäo bibliográfica, enfocando as tendências mais atuais e discussäo de casos em que foi efetuada hemodiluiçäo progressiva, associada à autotransfusäo per-operatória de lavado de hemácias recuperadas da ferida operatória, em Artrodese Posterior de Coluna. Os pacientes foram monitorizados por meio de gasometrias, hematócrito e dosagens de lactato e glicemia, seriados, no pré, per e pós-operatório, inclusive no momento de máxima hemodiluiçäo. É necessária uma atualizaçäo constante do profissional de saúde com respeito ao uso e às limitaçöes dessas técnicas, e, inclusive, a elaboraçäo de rotinas e trabalhos científicos, com o estabelecimento de parâmetros autóctones de atuaçäo. A otimizaçäo do uso do sangue e de hemoderivados, em benefício do paciente e da instituiçäo, somente pode ser efetivada com a participaçäo integrada de todos os profissionais de saúde na abordagem do paciente e na avaliaçäo dos resultados por meio de estudos científicos.


Subject(s)
Humans , Male , Female , Arthrodesis , Spine/surgery , Blood Transfusion, Autologous , Hemodilution
9.
J. bras. ginecol ; 93(1): 21-2, 1983.
Article in Portuguese | LILACS | ID: lil-15432

ABSTRACT

Apresentamos um caso de hemangiopericitoma vulvar. Tal tipo de tumor nao foi ainda descrito nesta localizacao e clinicamente apresentou-se como um tumor solido de glandula de Bartholin, em mulher de 45 anos. O diagnostico so foi possivel apos o exame anatomo-patologico da neoplasia retirada cirurgicamente


Subject(s)
Middle Aged , Humans , Female , Hemangiopericytoma , Vulvar Neoplasms , Genitalia, Female/surgery , Bartholin's Glands
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