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Search Results: 1 - 10 of 9436 matches for " Augusto;Cristofani "
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Determina??o da viabilidade de protoplastos irradiados de laranja 'pêra'
Cristofani, Mariangela;Mendes, Beatriz Januzzi;Tulmann Neto, Augusto;Ando, Akihiko;
Bragantia , 1993, DOI: 10.1590/S0006-87051993000200001
Abstract: the viability of 'pera' orange (citrus sinensis osbeck) protoplasts, submitted to different dosages of gamma radiation, was studied to determine the lethal dose (dl) 50. the analysis by fluorescence was employed using fluorescein diacetate (fda). the dilutions of fda (1:50; 1:100 and 1:150) did not show any statistical difference: then it was possible to use the 1:150 dilution in order to determine the protoplasts viability. the viability was inversaly proportional to gamma radiation and the dl 50 was about 41 gy. the non-irradiated protoplasts had their viability up to 84% when tested as soon after their isolation.
Uso de mutagênese "in vitro" no melhoramento de citros: I. Sensibilidade a raios gama de explantes do cultivar pêra
Tulmann Neto, Augusto;Cristofani, Mariangela;Mendes, Beatriz Madalena Januzzi;Ando, Akihiko;
Bragantia , 1994, DOI: 10.1590/S0006-87051994000200007
Abstract: in order to obtain basic data for future research in mutation breeding through "in vitro" technology in sweet orange cv. pêra, gamma rays sensitivity of different types of explants was analyzed. after irradiation the following observations were carried out: response of explants, number of embryoids and adventitious buds, callus weight and rooting formation. different results were obtained according the explant used. for irradiated nucellus, the dose was 20-40 gy and for embryogenic callus 120 gy is indicated. for irradiation of cotyledons originated from nucellar embryoids the use of 40 gy of gamma rays was recommended.
Linfoma de Hodgkin na infancia e adolescência: 15 anos de experiência com o protocolo DH-II-90
Souza, Luciana N. S.;Maluf Junior, Paulo T.;Almeida, Maria Tereza A.;Weltman, Eduardo;Cornacchioni, Ana Lucia;Teixeira, Roberto Augusto P.;Odone Filho, Vicente;Cristofani, Lilian Maria;
Revista Brasileira de Hematologia e Hemoterapia , 2010, DOI: 10.1590/S1516-84842010005000085
Abstract: the challenge of new protocols for hodgkin's lymphoma (hl) treatment is to decrease the toxicity without impairing the results. the dh-ii-90 protocol was designed to treat children and adolescents with hl. the objectives of this work were: 1) to assess the overall and event free survival of patients with newly diagnosed hl treated with the dh-ii-90 protocol, 2) to assess the overall and event free survival by stage, age, presence of bulky disease, mediastinal mass, b symptoms, dose and type of radiotherapy, and 3) to describe late effects, data collected from the patients' charts. sixty-eight patients with hl, from 0 to 21 years of age (median age 9 yr, 20f:48m) were treated with abvd and involved-field radiotherapy for low-risk patients, and abvd plus mop or cop and extended field radiotherapy for high-risk patients. stage distribution was: nine (13.2%) stage i a; 29 (42.6%) ii a; five (7.4%) ii b; nine (13.2%) iii a; ten (14.7%) iii b; two (2.9%) iv a and four (5.9%) iv b. the 10-year overall survival was 96.1% ± 3.8% for the low-risk group and 93.3% ± 4.5% for the high-risk group (p= 0.402). the 10-year event free survival was 88.9% ± 5.2% for high-risk and 86.5% ± 6.3% for low-risk patients (p= 0.969). the presence of mediastinal mass and more than 2100 cgy radiation doses had negative impact on event free survival (p= 0.020 and p= 0.014, respectively).thyroid gland dysfunction was frequently observed and there were two cases of thyroid carcinoma. the dh-ii-90 protocol is effective, but, due to the late effects presented by this group of patients, further modifications of the therapy schedule are required.
A Very Short Self-Interpreter
Oleg Mazonka,Daniel B. Cristofani
Computer Science , 2003,
Abstract: In this paper we would like to present a very short (possibly the shortest) self-interpreter, based on a simplistic Turing-complete imperative language. This interpreter explicitly processes the statements of the language, which means the interpreter constitutes a description of the language inside that same language. The paper does not require any specific knowledge; however, experience in programming and a vivid imagination are beneficial.
Treating Schizophrenia with DOTS in Developing Countries: One Size Does Not Fit All
Renato Souza,Silvia Yasuda,Susanna Cristofani
PLOS Medicine , 2007, DOI: 10.1371/journal.pmed.0040281
Abstract:
Mental health treatment outcomes in a humanitarian emergency: a pilot model for the integration of mental health into primary care in Habilla, Darfur
Renato Souza, Silvia Yasuda, Susanna Cristofani
International Journal of Mental Health Systems , 2009, DOI: 10.1186/1752-4458-3-17
Abstract: MSF has developed a model for integration of mental health into primary care in a humanitarian emergency setting based on the capacity of community health workers, clinical officers and health counsellors under the supervision of a psychiatrist trainer.Our study aims to describe the characteristics of patients first attending mental health services and their outcomes on functionality after treatment.A total of 114 patients received mental health care and 81 adult patients were evaluated with a simplified functionality assessment instrument at baseline, one month and 3 months after initiation of treatment.Most patients were diagnosed with epilepsy (47%) and psychosis (31%) and had never received treatment. In terms of follow up, 58% came for consultations at 1 month and 48% at 3 months.When comparing disability levels at baseline versus 1 month, mean disability score decreased from 9.1 (95%CI 8.1–10.2) to 7.1 (95%CI 5.9–8.2) p = 0.0001.At 1 month versus 3 months, mean score further decreased to 5.8 (95%CI 4.6–7.0) p < 0.0001.The findings suggest that there is potential to integrate mental health into primary care in humanitarian emergency contexts. Patients with severe mental illness and epilepsy are in particular need of mental health care.Different strategies for integration of mental health into primary care in humanitarian emergency settings need to be compared in terms of simplicity and feasibility.Despite the fact that mental disorders are commonly encountered among populations facing humanitarian emergencies, little research has been done on the description of treatment models for the integration of mental health care into primary health care in the midst of a humanitarian emergency and their outcomes. Most of the research has focused on posttraumatic stress disorder and little attention has been given to people suffering with severe mental disorders [1,2]. Added to that, most of the studies do not assess the effect of interventions on daily functioning, an ou
Performance of 2D Compressive Sensing on Wide-Beam Through-the-Wall Imaging
Edison Cristofani,Mathias Becquaert,Marijke Vandewal
Journal of Electrical and Computer Engineering , 2013, DOI: 10.1155/2013/636972
Abstract: Compressive sensing has become an accepted and powerful alternative to conventional data sampling schemes. Hardware simplicity, data, and measurement time reduction and simplified imagery are some of its most attractive strengths. This work aims at exploring the possibilities of using sparse vector recovery theory for actual engineering and defense- and security-oriented applications. Conventional through-the-wall imaging using a synthetic aperture configuration can also take advantage of compressive sensing by reducing data acquisition rates and omitting certain azimuth scanning positions. An ultra-wideband stepped frequency system carrying wide beam antennas performs through-the-wall imaging of a real scene, including a hollow concrete block wall and a corner reflector behind it. Random downsampling rates lower than those announced by Nyquist’s theorem both in the fast-time and azimuth domains are studied, as well as downsampling limitations for accurate imaging. Separate dictionaries are considered and modeled depending on the objects to be reconstructed: walls or point targets. Results show that an easy interpretation of through-the-wall scenes using the -norm and orthogonal matching pursuit algorithms is possible thanks to the simplification of the reconstructed scene, for which only as low as 25% of the conventional SAR data are needed. 1. Introduction Previous research studies have explored numerous applications of through-the-wall imaging (TWI) in domains which can exploit the convenient penetration capabilities of the 1–5?GHz frequency band in most nonmetal building construction materials [1, 2]. Indeed, being able to perform nondestructive inspection of objects behind a solid wall is a noteworthy application. The literature on TWI widely copes with object or human detection—either moving [3–5] or static [6, 7]. Among others, military, law enforcement, and security operations have already taken profit of the satisfactory performance of TWI. Although most of the studies suggest using an active TWI approach wherever needed, some authors opt for adequately processing opportunistic signals in the surroundings of the scene such as widespread GSM [8] or wireless networks [9]. Despite presenting interesting wall penetration properties, the noncooperative—thus passive—nature of these approaches cannot assure complete reliability and availability, and consequently, an active approach is preferred. Synthetic Aperture Radar (SAR) allows competitive TWI using rather common antennas with wide beams and simple out-of-focus data acquisition. Thanks to
Genetic linkage maps of 'Pêra' sweet orange and 'Cravo' mandarin with RAPD markers
Oliveira, Roberto Pedroso de;Cristofani, Mariangela;Machado, Marcos Ant?nio;
Pesquisa Agropecuária Brasileira , 2004, DOI: 10.1590/S0100-204X2004000200009
Abstract: the objective of this work was to construct linkage maps of 'pêra' sweet orange [citrus sinensis (l.) osbeck] and 'cravo' mandarin (citrus reticulata blanco) using rapd markers and the pseudo-testcross strategy. the parents were chosen according to the resistance/susceptibility to citrus variegate chlorosis (cvc). the segregation of 176 markers was analyzed in 94 progeny of f1 hybrids, which were obtained from controlled crossings. the linkage map of 'pêra' sweet orange had 117 markers defined by 12 linkage groups, which spanned 612.1 cm. only six markers could not be linked to the linkage group and 48.7% of the markers showed segregation distortion. the linkage map of 'cravo' mandarin had 51 markers defined by 12 linkage groups, which spanned 353.3 cm. only two markers did not link to the groups and 15.7% showed segregation distortion. the construction of linkage maps is relevant to future mapping studies of the inheritance of cvc, citrus canker and leprosis.
Breeding, genetic and genomic of citrus for disease resistance
Machado, Marcos A.;Cristofani-Yaly, Mariangela;Bastianel, Marinês;
Revista Brasileira de Fruticultura , 2011, DOI: 10.1590/S0100-29452011000500019
Abstract: although the citriculture is one of the most important economic activities in brazil, it is based on a small number of varieties. this fact has contributed for the vulnerability of the culture regarding the phytosanitary problems. a higher number of varieties/genotypes with potential for commercial growing, either for the industry or fresh market, has been one of the main objectives of citrus breeding programs. the genetic breeding of citrus has improved, in the last decades, due to the possibility of an association between biotechnological tools and classical methods of breeding. the use of molecular markers for early selection of zygotic seedlings from controlled crosses resulted in the possibility of selection of a high number of new combination and, as a consequence, the establishment of a great number of hybrids in field experiments. the faster new tools are incorporated in the program, the faster is possibility to reach new genotypes that can be tested as a new variety. good traits should be kept or incorporate, whereas bad traits have to be excluded or minimized in the new genotype. scion and rootstock can not be considered separately, and graft compatibility, fruit quality and productivity are essential traits to be evaluated in the last stages of the program. the mapping of qtls has favored breeding programs of several perennial species and in citrus it was possible to map several characteristics with qualitative and quantitative inheritance. the existence of linkage maps and qtls already mapped, the development of est and bac library and the sequencing of the citrus complete genome altogether make very demanding and urgent the exploration of such data to launch a wider genetic study of citrus. the rising of information on genome of several organisms has opened new approaches looking for integration between breeding, genetic and genome. genome assisted selection (gas) involves more than gene or complete genome sequencing and is becoming an import support in
Mapeamento de QTLs associados à produ??o de frutos e sementes em híbridos de Citrus Sunki vs. Poncirus trifoliata
Siviero, Amauri;Cristofani, Mariangela;Boava, Leonardo P.;Machado, Marcos A.;
Revista Brasileira de Fruticultura , 2002, DOI: 10.1590/S0100-29452002000300045
Abstract: citrus group shows juvenility strong due incapacity to flowering, vigor and thorn formation. trifoliata hybrids used as rootstocks to induce early production and better field for 'valencia' orange scion. seeds number per fruit is very important characteristic to citrus rootstocks candidate. the present study has as objective to detect quantitative trait loci (qtl) associated to fruiting and seeds production in f1 progeny obtained of citrus sunki vs. poncirus trifoliata cross. linkage groups (lg) of parents were built by pseudotestcross strategy using rapd markers. fruits/plant and seeds/fruit numbers were counting using 80 individuals of progeny. qtl detection was made with composite interval mapping using the qtl cartographer. qtl linked to fruiting and seed production in lg 4 and lg 5 of the p. trifoliata map, respectively, were detected.
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