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Search Results: 1 - 10 of 437738 matches for " J.F;Silva "
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Efeitos do controle de plantas daninhas, com herbicidas, na produ??o e qualidade fisiológica de sementes de amendoim (Arachis hypogaea L.)
Silva, J.F.;Costa, L.M. da;Silva, C.M. da;
Planta Daninha , 1983, DOI: 10.1590/S0100-83581983000200004
Abstract: an experiment was carried out in a cambic yellowish red podzolic soil, terrace phase, with 2,8% organic matter and claye y texture, to evaluate the effect of herbicides on weed control as w'ell as production and physiological quality of peanut (arachis hypogaea l. 'tatu') . the treatments were: weeded check, unweeded check, vernolate 3,6 kg a.i ./ha; trifluralin 0,58 kg a.i ./ha; fluorodifen 0,9 kg a.i ./ha; nitralin 0,75 kg a.i ./ha; pendimenthalin 1,5 kg a.i ./ha. the initial stand, seed production, hull, hulled peanut, and the number of weeds were evaluated. the test to evaluate the peanut physiological seed quality was perfomed. the seeds were placed in the accelerated aging chamber for a period of time such as 20, 60, and 80 hours under 42° ± 3°c and 95% relative humidity, and then the standard germination test was carried out. the woodso rrel (oxalis sp). small flower galinsoga (galinsoga parviflora) and nutsedge (cyperus rotundus l.) predominat ed in the fie ld plots. trifluralin, fluorodifen and pendimenthalin were the herbicides that controlled most of the woodsorrel. on the other hand nitra lin treatment did not differ of the unweeded check for nutsedge. the smal lf lower gali nsoga was totally controlled by pendimethalin. the herbicide treaments and the check plots did not differ statistically for seed production. the production of hull and hulled peanut with fluorodifen was only higher than weeded check plot. the peanut germination was damaged for the seed which came from weeded check and nitralin plots due to seed patho gens. the deterioration of the peanut seeds placed in the accelerated chamber was observed in the 20 hours period of time for weeded check and triflural in treatments. the seeds placed in that chamber for 40 hours period, were not accelerated for the unweeded check and fluorodifen treatments.
Movimento e inativa o do metribuzin em materiais de dois solos, sob diferentes densidades aparentes Movement and inactivation of metribuzin in two soil materials with different bulk densities
L.E.F. Fontes,B. Fernandes,J.F. da Silva
Planta Daninha , 1980, DOI: 10.1590/s0100-83581980000100002
Abstract: Numa série de ensaios em laboratório e casa-de-vegeta o, estudou-se a mobilidade e a inativa o do herbicida metribuzin em materiais de um Latossolo e de um Podzólico representativos de duas regi es do Estado de Minas Gerais, em fun o de diferentes densidades aparentes. Ensaios biológicos foram utilizados para medir a inativa o e a mobilidade do metribuzin nos diferentes solos e densidades. A densidade aparente alterou de forma pronunciada a quantidade de herbicida lixiviado através das colunas dos materiais dos solos estudados. Quanto maior a densidade, menor a quantidade de herbicida lixiviado. A quantidade de herbicida que permaneceu biologicamente ativo ao longo da coluna foi diretamente relacionada com a densidade, em cada solo. A mobilidade do metribuzin no material do Latossolo foi maior que no de Podzólico, em consequência de maior atividade coloidal deste. The leaching and inactivation of metribuzin were studied with materials of two mineral soilsat different bulk densities. Plastic tubing of' 7.25 cm diameter and 10 cm height were filled up with different amounts of soil to get different bulk densities. One kg/ha of a.i. of metribuzin placed on the surface are a of the column was le ached through these soil colums using 250 ml of water. The cotyledon disk bioassay method was used to detect the metribuzin leachet. The biological active metribuzin in the soil colunn at different depths, and the inativation abil ity of the soils were determined using the assay with cucumber (Cucumis sativus L.) as test-plant. The increase of bulk density reduced the leaching and enhanced the biologically active metribuzin in the soil column. Metribuzin was more mobil in the Red -yellow Lato ssol and more inactivated in the Red-yellow Podzolic soils.
Estádios de desenvolvimento embrionário de vacas zebuínas superovuladas
Fonseca, J.F.;Silva Filho, J.M.;Pinto Neto, A.;Palhares, M.S.;
Arquivo Brasileiro de Medicina Veterinária e Zootecnia , 2001, DOI: 10.1590/S0102-09352001000600010
Abstract: this study was carried out with the objective of reporting the developing stages of embryos collected from superovulated zebu cows. twenty-six zebu cows of nelore (16), polled nelore (3), gir (4), brahman (2) and guzerá (1) breeds were superovulated with 350iu of fsh, divided into eight decreasing doses administered each 12 hours, starting on day 10 of the estrous cycle (estrous = day 0). seven-day embryos were collected non-surgically and evaluated at microscopy to determine the grade and stage of development. a total of 135 viable embryos were collected, being 68.2% (92/135) nelore, 12.6% (17/135) pooled nelore, 11.1% (15/135) gir, 5.2% (7/135) brahman and 3.0% (4/135) guzerá. embryos were classified according to quality as grade i, 51.1% (69/135), grade-ii, 43.7% (59/135), grade-iii, 4.4% (6/135), and grade-iv, 0.7% (1/135), and according to developmental stage in morulae, 3.7% (5/135), young blastocyst, 16.3% (22/135), blastocyst, 37.0% (50/135), expanded blastocyst, 42.2% (57/135), and hatched blastocyst, 0.7% (1/135). these results showed the predominance of advanced developing stages (blastocyst, expanded blastocyst and hatched blastocyst) witch represented 80% of the total of embryos.
Taxas de gesta o de novilhas receptoras submetidas à administra o de rbST, GnRH ou hCG no quinto dia do ciclo estral
Fonseca J.F.,Silva Filho J.M.,Pinto Neto A.,Palhares M.S.
Arquivo Brasileiro de Medicina Veterinária e Zootecnia , 2001,
Abstract: Estudou-se a habilidade de diferentes horm nios administrados no quinto dia do ciclo estral em elevar a taxa de gesta o em 196 novilhas receptoras, mesti as Holandês-Zebu, aleatoriamente distribuídas em quatro tratamentos: T1-controle (n=50), T2-administra o subcutanea de 500mg de rbST (n=44), T3-administra o intramuscular de 100m g de GnRH (gonadorelina; n=46) e T4-administra o de 3000UI de hCG (1000UI endovenosa e 2000UI intramuscular; n=56). Embri es coletados aos sete dias foram eqüitativamente distribuídos (estádio e qualidade) e transferidos para as receptoras no sétimo dia do ciclo estral. As taxas de gesta o detectadas por palpa o transretal 53 dias após a transferência dos embri es n o diferiram entre os tratamentos, sendo: 15/24 em T1 (62,5%), 15/25 em T2 (60,0%), 13/29 em T3 (44,8%) e 22/31 em T4 (71,0%). Estes resultados demonstraram que a administra o de rbST, GnRH ou hCG no quinto dia do ciclo estral n o foi capaz de elevar as taxas de gesta o.
Taxa de gesta o e morfologia de embri es bovinos da ra a Nelore resfriados por 24 horas a 5°C em contêiner modelo Celle modificado
Pinto Neto A.,Silva Filho J.M.,Fonseca J.F.,Palhares M.S.
Arquivo Brasileiro de Medicina Veterinária e Zootecnia , 1999,
Abstract: Na tentativa de se estabelecerem condi es de estocagem de embri es bovinos da ra a Nelore, resfriaram-se 29 embri es em um contêiner modelo Celle modificado, por 24 horas a 5°C. Os embri es foram avaliados, classificados quanto ao estádio de desenvolvimento e qualidade embrionária, antes e após o resfriamento, e transferidos a receptoras sincronizadas à base de prostaglandina e progestágeno. Dos embri es resfriados, 82,8% (24/29) eram grau I, 13,6% (3/29) grau II e 6,9% (2/29) grau III. Após 24 horas de resfriamento, 62,1% (18/29) dos embri es continuaram grau I, 20,7% (6/29) grau II e 17,2% (5/29) grau III. Durante o resfriamento, todos os embri es permaneceram no mesmo estádio de desenvolvimento. Porém, dos embri es na fase de blastocisto inicial a blastocisto expandido, 82,8% (24/29) apresentaram colapso da blastocele. Após a transferência, obtiveram-se 37,9% (11/29) de gesta o positiva, inferior (P<0,05) àquela apresentada pelo grupo-controle, de 75,6% (62/82). Possivelmente, o método de sincroniza o influenciou os resultados, obtendo-se apenas uma gesta o positiva das 11 receptoras que receberam progestágenos.
Application of Taguchi method in the optimisation of filament winding of thermoplastic composites
L.A. Dobrzański,J. Domaga?a,J.F. Silva
Archives of Materials Science and Engineering , 2007,
Abstract: Purpose: Purpose of this paper was to find the optimum parameters to produce Twintex tubes by filament winding.Design/methodology/approach: Taguchi approach was used for this design. The experiments were done with varying fibers temperature, winding speed, number of layers and roving. Thermoplastic composite rings were manufactured in the thermoplastic filament winding process at selected conditions. The glass and polypropylene fibers (Twintex ) were used to produce tubes. The influence of the main process parameters on tensile strength and also shear strength was assessed.Findings: As it is presented in this work, the machining parameters, number of layers and roving affect on shear and tensile strength. Fibres temperature is very significant parameter both in tensile strength and shear test. Research limitations/implications: The main objective of the present study was to apply the Taguchi method to establish the optimal set of control parameters for the tubes by filament winding. The Taguchi method is employed to determine the optimal combination of design parameters, including: fibers temperature, winding speed, number of layers and number of roving.Originality/value: This paper presents new results of optimisation using Taguchi method filament winding process parameters producing new tubes from the thermoplastic Twintex material.
Estádios de desenvolvimento embrionário de vacas zebuínas superovuladas
Fonseca J.F.,Silva Filho J.M.,Pinto Neto A.,Palhares M.S.
Arquivo Brasileiro de Medicina Veterinária e Zootecnia , 2001,
Abstract: O objetivo deste estudo foi relatar o estádio de desenvolvimento de embri es coletados a partir de processos superovulatórios em zebuínos. Foram utilizadas 26 vacas, 16 da ra a Nelore Padr o, três da Nelore Mocho, quatro da Gir, duas da Brahman e uma da ra a Guzerá. Para o processo de superovula o utilizaram-se 350 UI de FSH em oito doses decrescentes a cada 12 horas, a partir do 10odia do ciclo estral (estro = dia 0). Ao sétimo dia após o estro os embri es foram coletados pelo método n o cirúrgico e avaliados ao microscópio estereoscópio quanto à qualidade e estádio de desenvolvimento embrionário. Foram coletados 135 embri es viáveis, sendo 68,2% (92/135) Nelore Padr o, 12,6% (17/135) Nelore Mocho, 11,1% (15/135) Gir, 5,2% (7/135) Brahman e 3,0% (4/135) Guzerá. Os embri es foram classificados segundo a qualidade em grau I, 51,1% (69/135), grau II, 43,7% (59/135), grau III, 4,4% (6/135), e grau IV, 0,7% (1/135), e segundo o estádio de desenvolvimento em mórula, 3,7% (5/135), blastocisto inicial, 16,3% (22/135), blastocisto, 37,0% (50/135), blastocisto expandido, 42,2% (57/135), e blastocisto eclodido, 0,7% (1/135). Observou-se predominancia de estádios embrionários avan ados (blastocisto, blastocisto expandido e blastocisto eclodido) que representaram 80% do total de embri es.
Toxina botulínica tipo A tópica con iontoforesis para el tratamiento de la hiperhidrosis axilar: Efecto y persistencia
Silva-Gavarrete,J.F.; Cárdenas-Camarena,L.; Guerrero,M.T.;
Cirugía Plástica Ibero-Latinoamericana , 2011, DOI: 10.4321/S0376-78922011000300013
Abstract: the overproduction of sweat by the exocrine glands is termed hyperhidrosis (hh) and frequently become a dermatologic and social problem for humans. nowadays, we have multiple treatments that controls the armpit hh. botulinum toxin type a (txb-a) is known to be the best treatment to eliminate this problem but the needing of multiple injections in the armpit limits patients′ acceptance. clinical iontophoresis method uses galvanic current to introduce many transdermal medications. we perform a simple blind clinical assay over 10 patients with armpit hh in who we apply an inert gel blended with botulinum toxin type a (txb-a) dysport? using one session of iontopheresis in one armpit; in the same moment the other armpit was injected with the toxin in the conventional way. the results where evaluated and compare by minor test (starch-iodine test) in each patient at day 10th, 2 months and 5 months after the application. the same number of units and dilution of txb-a where used in the topic and injected administration way. results shows a diminished armpit hh in both sides over the whole study, been higher percentage of the effect in the injected way. in general a 74.67% decrease of armpit sweat for the topical way with iontopheresis and 90.33% of decrease of armpit sweat for the injected way. in the 5 months control of the persistency of the effect, both ways of administration of txb-a reports with statistical significant results. therefore in the present study we conclude that txb-a apply topically with iontopheresis improves the armpit hh and shows a persistency of the effect at least for 5 months period.
Colocación de implantes glúteos y de cadera: una alternativa para mejorar el contorno en hipoplasia glúteo-trocantérea
Cárdenas-Camarena,L.; Silva-Gavarrete,J.F.;
Cirugía Plástica Ibero-Latinoamericana , 2012, DOI: 10.4321/S0376-78922012000100004
Abstract: improvement of the gluteal and hip contour in patients seeking a more feminine shape is difficult to achieve, specially for those who don't have enough fat to transfer from other areas of the body. we describe the surgical technique used to improve hips and buttocks contour in a genetic male transsexual. this patient previously underrwent two unsuccessful surgeries to feminize his hip and buttock contour. our successful approach involved the use of an oval-shaped cohesive silicone gel implants placed in both, the hip and buttock areas, along with fat injection in the areas between the two implants. a natural, feminine contour was achieved using the combination of buttock and hip implants with lipofilling using patient's own fat. these procedures completely eliminated the male contour previously noted in the gluteal trochanteric region. this surgical combination presents a new option, not previously reported, for the treatment of transsexual patients seeking a more natural feminine gluteal contour. the results are both gratifying and predictable. the combined use of gluteal and hip implants helps us to improve the deficiencies present in male patients when compared with the natural feminine buttock and hip contour.
Eficácia de herbicidas no controle de plantas daninhas e seletividade em leguminosas de cobertura e cupua?uzeiro
Silva, J.F.;Bueno, C.R.;Souza, A.G.C.;
Planta Daninha , 2003, DOI: 10.1590/S0100-83582003000100017
Abstract: the cupuassu tree theobroma grandflorum is a typical amazonian plant. its fruit, the cupuassu, is one of the most popular fruits in the region with an increasing demand due to its organoleptic characteristics and multi use by the agro industry. its cultivation, however, is still very rudimentar and its production is highly affected by weeds. the objective of this study is to evaluate the effects of the herbicides alachlor and haloxyfop on weed control and selectivity for the leguminous plants mucuna cochinchinensis and pueraria phaseoloides and young cupuassu trees. this experiment was conducted under field conditions to evaluate the effect of herbicides on shoot dry matter production and leaf area index (lai) of the weeds and leguminous plants and their phytotoxicity to cupuassu trees. regarding the weeds, alachlor applied at 4.00 kg ha-1 reduced dry matter production by 75.60% and lai by 64.02 %, whereas haloxyfop inhibited 62.51% of the dry matter accumulation and 64.23% of lai. the herbicides were selective to the leguminous plants and haloxyfop at 0.12 kg ha-1 stimulated dry matter production of the aerial part in 180.15% and lai in 146.68 %. the herbicides did not cause any injury to the cupuassu tree or to the leguminous plants and provided over 60% of weed control.
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