Propagação vegetativa do cafeeiro (Coffea arabica L.) por meio de enraizamento de estacas.

Buscando-se uma metodologia que permita a regeneração de plantas de Coffea arabica L. a partir do enraizamento de estacas, foi conduzido um experimento no Departamento de Agricultura da Universidade federal de Lavras (UFLA) - Lavras, MG, em casa-de-vegetação,com sistema automático de irrigação por microaspersão. Utilizaram-se cafeeiros das cultivares Catuaí Vermelho e e Acaiá na ausência e presença do zinco em adubação foliar, imergindo ou não suas estacas e em águua corrente para posterior tratamento com antioxidante e regulador de crescimento. A cultivar Conillon foi utilizada adicionalmente sem tratamento algum. Acredita-se que o menor percentual de pegamento das estacas de C. Arabica seja por problemas de oxidação por fenóis,, ocasionados pelos ferimentos quando do preparo das estacas. O trabalho testou a eficiência da água e do antioxidante PVP (polivvinilpirrolidone), na lavagem e inativação desses fenóis tidos como uma das principais causas do escurecimento e inibição do processo. Visando a estimular o enraizamento fez-se uso da auxina AIB (ácido inindol butírico), regulador de crescimento muito utilizado para esse fim. As avaliações foram feitas 6 meses após a implantação do experimento, sendo avaliadas as seguintes características: percentual de estacas verdes com raízes; peso da matéria seca das raízes e número de raízes por estacas. Os resultados demonstraram que o zinco, a água e o antioxidante não são eficientes na promoção do enraizamento do cafeeiro na concentração e tempo de imersão testados. A cultivar Acaiá,, associada à utilização da auxina AIB apresenta-se mais adequada para o enraizamento que a cultivar Catuaí Vermelho, e o enraizamento da cultivar Conillon, sem nenhum tratamento, é superior a 90% sob nebulização intermitente

Loss To Follow-up In Anti-hcv-positive Patients In A Brazilian Regional Outpatient Clinic

Loss to follow-up (LF), which refers to patients who started care but voluntary stopped it, is a problem for patients with chronic disease. We aimed to estimate the rate of LF among patients seropositive for hepatitis C virus (HCV) and identify possible demographic and lifestyle risk factors associated with LF. From January 2009 through December 2012, 1010 anti-HCV-positive patients were included in the study. Among participants, 223 (22.1%) met the case definition for LF (more than 1-year elapsed since the last clinical appointment). Among 787 patients who remained in follow-up, 372 (47.2%) were discharged after undetectable HCV RNA, 88 (11.1%) were transferred (and remained on regular follow-up at the destination), and 25 (3.1%) died. According to univariate analysis, male gender, absence of a life partner, black race, psychiatric illness, previous alcohol abuse, previous or current recreational drug use, and previous or current smoking were significantly associated with LF. In multivariate analysis, absence of a life partner (adjusted odds ratio (AOR)=1.44; 95% confidence interval (95% CI)=1.03-2.02),black race (AOR=1.81, 95% CI=1.12-2.89), psychiatric illness (AOR=1.77, 95% CI=1.14-2.73), and the presence of at least one lifestyle risk factor (pertaining to substance abuse) (AOR=1.95, 95% CI=1.29-2.94) were independently associated with LF. Our study provides an estimate of the incidence of LF among anti-HCV-positive patients and identifies risk factors associated with this outcome. In addition, these results can help clinicians recognize patients at risk for LF, who require additional support for the continuity of care.491

New hydrophilic, partially degradable and bioactive cements (HDBC) to improve interface with bone

[Excerpt] Acrylic bone cements aim to fix prosthesis to bone during hip arthroplasty. The commercial acrylic bone cements perform their function, however at the long term they fail due to aseptic loosening of two interfaces: prosthesis-cement and cement bone. To minimize these problems, the bone growth should be promoted on the surface and inside of the partially degradable bone cement. In our work five different formulations were developed containing in the powder a biodegradable component such as modified corn starch with acrylic segments (methacrylated starch) as well cellulose acetate blended with corn starch (SCA). These components reacted with acrylic monomers (methylmethacrylate (MMA) and 2-hydroxyethyl methacrylate (HEMA)) to produce hydrophilic partially degradable bone cements by radical polymerization. Diverse molar ratios MMA/HEMA as well the amount of initiator/ activator were employed in such cements. [...]info:eu-repo/semantics/publishedVersio