A quantum-like description of the planetary systems

The Titius-Bode law for planetary distances is reviewed. A model describing the basic features of this rule in the "quantum-like" language of a wave equation is proposed. Some considerations about the 't Hooft idea on the quantum behaviour of deterministic systems with dissipation are discussed.Comment: LaTex file, 17 pages, no figures. Version published in Foundations of Physics, August 200

Antagonismo de isolados de Trichoderma contra fungos fitopatogênicos habitantes do solo.

Para o diminuir os prejuízos na produção de hortaliças causados por patógenos habitantes do solo, uma das alternativas é o controle biológico. Este trabalho teve como objetivo avaliar o antagonismo in vitro de seis isolados amazônicos de Trichoderma spp. provenientes da coleção do INPA que foram avaliados em experimentos anteriores como controladores da queima-da-saia em alface (Rhizoctonia solani) e de podridão-de-Sclerotium (Sclerotium rolfsii) em pimentão e tomate

Seleção de isolados de Trichoderma spp. para controle biológico de Sclerotium rolfsii em tomateiros.

Doenças causadas por patógenos habitantes do solo são de difícil controle e causam sérios prejuízos na produção de espécies olerícolas no Amazonas. A pesquisa objetiva avaliar seis isolados amazônicos de Trichoderma spp. que mostraram potencial em experimentos anteriores no controle de podridão-de-Sclerotium (Sclerotium rolfsii) em tomateiro (Solanum lycopersicum)

Risk factors of post renal transplant anaemia among Sudanese patients, a study in three renal transplant centres

<p>Abstract</p> <p>Background</p> <p>There is a relative lack of recent information about late post kidney transplantation anaemia (PTA), especially in the developing countries; data are scarce about the prevalence and risk factors of PTA. Sudan was a leading country in Africa and Arab world in kidney transplantation. The first kidney transplantation in Sudan was in 1973.</p> <p>Methods</p> <p>This is a cross-sectional hospital analytic study enrolling all kidney transplanted recipients following in the transplant referral clinics at Ahmed Gassim, Selma and Ibn Sina Hospitals, Khartoum/Sudan, in the period from 1/8/2010 to 1/9/2010, clinical and laboratory data were obtained from 114 patients, anaemia was defined as Hb levels of < 13 g/dl for male patients and < 12 g/dl for female patients, exclusion criteria were pregnancy, below 18 years old patients, multiple organ transplantation, and patients with less than one year from the transplantation.</p> <p>Results</p> <p>The study showed that 39.5% of the patients were anaemic. Univariate analysis showed that late PTA is significantly associated with not using Erythropoietin (EPO) in the pre-transplant period (p = < 0.001), history of rejection (p = 0.003), longer time from transplantation (p = 0.015), and eGFR (p < 0.0001). Multivariate analysis showed that eGFR (p = < 0.001) and not use of EPO in the pre transplant period (p < 0.001) are strong predictors of PTA. The use of Angiotensin converting enzyme inhibitors/Angiotensin receptors blockers (ACEI/ARB), immunosuppressive treatments, presence or absence of co-morbidities, donor type and donor age are not significantly associated with late PTA.</p> <p>Conclusion</p> <p>The study concluded that late PTA is common and under recognized. Risk factors for late PTA include renal dysfunction, history of rejection, longer duration of transplantation and not using EPO in the pre-transplant period. Renal dysfunction and not using EPO in the pre-transplant period are major predictors of late PTA.</p