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Alfenas, Brazil

Mesquita J.,UNIFENAS | Salgueiro L.,University of Coimbra | Cavaleiro C.,University of Coimbra
Boletin Latinoamericano y del Caribe de Plantas Medicinales y Aromaticas | Year: 2013

The essential oil obtained by hydrodistillation from dry leaves of Capsicodendron dinisii (Schwancke) was analyzed using gas chromatography (GC) and gas chromatography/mass (GC/MS) spectrometry. According to GC and GC/MS analysis, the essential oil is mostly composed of sesquiterpene hydrocarbons (69.7%) and oxygenated sesquiterpenes (22.6%). Bicyclogermacrene (30.8%), E-caryophyllene (17.2%), spathulenol (13.5%) and germacrene D (7.6%) were the principal components identified in the essential oil. © 2013 Boletín Latinoamericano y del Caribe de Plantas Medicinales y Aromáticas. Source

da Silva E.C.,Federal University of Sao Joao del Rei | de A Pinto C.,UNIFENAS | de Souza-Dias J.A.C.,APTA IAC | de Araujo T.H.,Nucleo Tecnologico de Batata e Morango
Horticultura Brasileira | Year: 2011

The seed potatoes (Solanum tuberosum) are considered a key factor to ensure high productivity, quality of the tuber and a good harvest. This study was carried out at the University José Rosário Vellano (UNIFENAS), Alfenas, Minas Gerais state, Brazil, from September 2007 until September 2008 in three distinct and sequential stages. The objective was to study the effect of growth regulators applied on: (1) sprouts detached from seed-potato tubers on minituber yield, (2) sprouting minituber and (3) marketable yield originated from minitubers. Potato sprouts used were detached from seed potatoes tubers (virus free), cultivar Bintje, originated from an experimental import of sprouts from Alaska (USA), with two sizes: large sprouts (average of 25 cm) and small sprouts (average of 13 cm) and growth regulators IBA, GA3, BAP and 2,4D. The experimental design for all experiments was of randomized blocks in a factorial scheme 5x2 with three replications. The number of minitubers produced in the first stage originated from large sprouts varied significantly from 3.1 (GA3) to 7.7 (IBA) and 2.3 (IBA) to 7.9 (control), small prouts, while the weight varied from 7.5 g (GA3) to 10.6 g (IBA), large sprouts and 3.4 g (IBA) to 12.3 g (control), small sprouts. The minitubers did not show significant differences for the time of shooting which occurred within seven to eight days. Marketable production originated from minitubers varied significantly from 12.06 t ha -1 (GA3) to 29.51 t ha -1 (AIB), large sprouts and 22.11 t ha -1 (BAP) to 30.35 t ha -1 (control), small sprout. Sprouts from seed-potato tubers cv Bintje, can be used for seed tuber production and should not be treated with growth regulators. Small sprouts, detached from seed potatoes, cultivar Bintje, without treatment, should be preferred for the production of seed-potato minitubers. Source

Miranda J.M.,Federal University of Alfenas | Rigoni M.V.,UNIFENAS | Silveira F.T.,Usina Monte Alegre
Bioscience Journal | Year: 2011

Crotalaria juncea is very usual as green manures in sugar cane crop; these experiments analyzed the efficiency of Crotalaria juncea as green manure and the interaction with chemical manures (mineral fertilizers) and organic manures using compost of "torta de filtro" in sugar cane fields. The experiments were carried out with typic dystrophic Red latosol (oxisol) in Areado city of Southern Minas Gerais, installed by Monte Alegre Group Adecoagro in the city of Monte Belo - Minas Gerais. The block design was randomized with six treatments and three replicates. The treatments were: Crotalaria juncea and organic manures with "compost of " " torta de filtro"; Crotalaria juncea and Chemical manures (mineral fertilizers); Crotalaria juncea; Organic manures with compost of "torta de filtro" Chemical manures (mineral fertilizers) and control. Response obtained was significantly higher using as green manure Crotalaria juncea associated with organic manures, in both productions sugar cane and sugar. Using only Crotalaria juncea as Green Manure in the formation of a sugar cane field was damaging to all attributes. Source

do Carmo D.L.,Federal University of Lavras | Dias Jr. M.S.,Federal University of Lavras | Santo D.J.E.,Tecnologos em Cafeicultura pelo IF | Nannetti A.N.,UNIFENAS | Lacerda T.M.,Tecnologos em Cafeicultura pelo IF
Revista Brasileira de Ciencia do Solo | Year: 2011

In view of the different managements used in coffee production, this study aimed to quantify the changes of some physical properties of an Oxisol under four-year-old coffee, in southern Minas Gerais. Three management systems were compared to native forest. The following management systems were evaluated: mechanized coffee production (CCM), coffee without mechanization (CSM), dense coffee plantation (CA) and native forest (MN) as reference. Undisturbed samples were collected with an Uhland sampler and aluminum rings (diameter 6.35 cm, height 2.54 cm), from the layers 0-3 cm and 15-18 cm; in the latter the maximum mechanical resistance had been previously determined by a penetrometer. The coffee plantations were sampled at two points, i.e., in the wheel track and under the trees (canopy projection) under CCM and CSM management, in-between coffee rows and under the trees under CA management, and randomly in native forest, with four replications, totaling 56 samples. The physical properties soil bulk density (BD), particle density (Dp), soil resistance to penetration (RP), total pore volume (VTP), macroporosity (Ma) and microporosity (Mi) and Ma/Mi ratio were evaluated. The mechanized coffee system affected the physical properties in the wheel track, as indicated by increases in soil density and soil penetration resistance and reduced total porosity, macroporosity and Ma/Mi ratio, four years after planting. In the 0-3 cm layer, macroporosity and Ma/Mi ratio were lower in the mechanized coffee system and microporosity, and penetration resistance higher than in the deeper layer, four years after planting. Source

Junior A.A.S.,Federal University of Minas Gerais | Bigal M.,Merck And Co. | Vasconcelos L.P.B.,Federal University of Minas Gerais | Rodrigues J.,UNIFENAS | And 5 more authors.
Headache | Year: 2012

Background. Migraine is comorbid to depression and widespread chronic pain (WCP), but the influence of these conditions on the health-related quality of life (HRQoL) of individuals with episodic (EM) and chronic migraine (CM) is poorly understood. Objective. To assess the prevalence of depressive symptoms and WCP in individuals with EM and CM, as well as to estimate the joint impact of these conditions on the HRQoL of these individuals. Methods. All women aged 18 to 65 years with a first diagnosis of EM or CM from September of 2006 to September of 2008 seen in an outpatient headache service were invited to participate. They were asked to attend a separate appointment in the service and to bring another woman of similar age that also agreed to participate. Depressive symptoms were assessed using the Beck Depression Inventory. Questions about WCP followed the protocol of the American College of Rheumatology. HRQoL was assessed using the Medical Outcome Study Short-Form 36-item Survey (SF-36). Multivariate analysis modeled HRQoL as a function of headache status, depressive symptoms, and pain using quantile regression. Results. Sample consisted of 179 women, 53 in the EM group, 37 in the CM group, and 89 in control group. Groups did not differ by demographics. Mean scores of SF-36 were 53.6 (standard deviation [SD] = 23.5) for EM, 44.2 (SD = 18.5) for CM, and 61.8 (SD = 21.5) for controls. In multivariate analysis, SF-36 scores were predicted by a CM status (P =.02; -10.05 [95% confidence interval -18.52; -1.58]) and by a Beck Depression Inventory score (P <.01; -1.27 [95% confidence interval -1.55; -0.99]). The influence of WCP in the SF-36 scores approached significance (P =.08; -0.78 [95% -1.64; 0.88]). Age did not contribute to the model. © 2012 American Headache Society. Source

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