Sabiia Seb
PortuguêsEspañolEnglish
Embrapa
        Busca avançada

Botão Atualizar


Botão Atualizar

Ordenar por: 

RelevânciaAutorTítuloAnoImprime registros no formato resumido
Registros recuperados: 70
Primeira ... 1234 ... Última
Imagem não selecionada

Imprime registro no formato completo
An electrically operated kola nut pods breaking machine CIGR Journal
Bamgboye, A. Isaac; Okedun, R. A..
Kola nut pod breaking is a very tedious task manually; therefore its mechanization is essential for effective processing.  The objectives of this study are to design and fabricate a kola nut pod breaking machine and performance evaluation of kola nut pods breaking machine.  Some physical and mechanical properties required for machine design were determined using standard methods.  The machine was powered by an electric motor, with the hammer attached to the shaft using a drum with a rope tension of 171.68N, cross–sectional area of 5.027 x 10-5m2 and 3414.90 kN/m2 tensile stress.  The speed of the machine used by the pulley was 308.57 r/min to operate. The machine was evaluated by using one to four pods at a time, and was replicated four times.The average...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Farm Machinery kola nut pods; Machine capacity; Machine efficiency; Mechanical properties; Kola nut pod breaking machine.
Ano: 2016 URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/3394
Imagem não selecionada

Imprime registro no formato completo
Biodegradable blends of urea plasticizes thermoplastic starch (UTPS) and poly (&-coprolactone) (PCL): morphological, reological, thermal and mechanical properties. Repositório Alice
CORREA, A. C.; CARMONA, V. B.; SIMÃO, J. A.; MATTOSO, L. H. C.; MARCONCINI, J. M..
Tipo: Artigo de periódico Palavras-chave: UTPS; PCL; Polymer blends; Morphology.; Mechanical properties; Rheology; Thermal analysis..
Ano: 2017 URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1081128
Imagem não selecionada

Imprime registro no formato completo
Biodegradable foams based on starch, polyvinyl alcohol, chitosan and sugarcane fibers obtained by extrusion BABT
Debiagi,Flávia; Mali,Suzana; Grossmann,Maria Victória Eiras; Yamashita,Fábio.
Biodegradable foams made from cassava starch, polyvinyl alcohol (PVA), sugarcane bagasse fibers and chitosan were obtained by extrusion. The composites were prepared with formulations determined by a constrained ternary mixtures experimental design, using as variables: (X1) starch / PVA (100 - 70%), (X2) chitosan (0 - 2%) and (X3) fibers from sugar cane (0 - 28%). The effects of varying proportions of these three components on foam properties were studied, as well the relationship between their properties and foam microstructure. The addition of starch/PVA in high proportions increased the expansion index and mechanical resistance of studied foams. Fibers addition improved the expansion and mechanical properties of the foams. There was a trend of red and...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Cassava starch; Mechanical properties; Microstructure; Expansion.
Ano: 2011 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132011000500023
Imagem não selecionada

Imprime registro no formato completo
Biomechanics of major ampullate silk from Nephilengys cruentata. Repositório Alice
BITTENCOURT, D. M. de C.; VERZA, N. C.; SOUTO, B. M.; OLIVEIRA, P. E. F.; SILVA, L. P.; LEWIS, R. V.; RECH, E. L..
Major ampullate sílk, which serves as the spider's lifeline and structural frame silk for its web, has been the most extensively studied of the spider silks, probably because of its exceptional mechanical properties. the major ampullate fibers of orb weavers are known to have strength on the same order of magnitude as that of the high performance fiber Kevlar but approximately seven times the elasticity.
Tipo: Parte de livro Palavras-chave: Biomecânica; Ampola; Spider; Nephilengys cruentata; Glándulas de seda; Fibras animales; Ingeniería de proteínas; Telarañas; Proteínas de la seda; Propiedades mecánicas.; Engenharia Genética; Aranha; Biologia Animal; Fibra Animal; Seda; Propriedade Mecânica.; Protein engineering; Araneae; Biomechanics; Silk glands; Silk proteins.; Mechanical properties; Animal fibers; Webs.
Ano: 2007 URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/505929
Imagem não selecionada

Imprime registro no formato completo
Calculation of viscoelastic properties of edible films: application of three models Ciênc. Tecnol. Aliment.
CHANDRA,Prabir K.; SOBRAL,Paulo J. do A..
The viscoelastic properties of edible films can provide information at the structural level of the biopolymers used. The objective of this work was to test three simple models of linear viscoelastic theory (Maxwell, Generalized Maxwell with two units in parallel, and Burgers) using the results of stress relaxation tests in edible films of myofibrillar proteins of Nile Tilapia. The films were elaborated according to a casting technique and pre-conditioned at 58% relative humidity and 22ºC for 4 days. The testing sample (15mm x 118mm) was submitted to tests of stress relaxation in an equipment of physical measurements, TA.XT2i. The deformation, imposed to the sample, was 1%, guaranteeing the permanency in the domain of the linear viscoelasticity. The models...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Edible films; Myofibrillar protein; Linear viscoelasticity; Mechanical properties.
Ano: 2000 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-20612000000200021
Imagem não selecionada

Imprime registro no formato completo
Classification of papaya crispiness based on mechanical properties CIGR Journal
Terdwongworakul, Anupun.
This research investigated an objective technique for the classification of papaya varieties based on crispiness. Five varieties of papaya were sampled with variation in crispiness. The papaya samples were mechanically tested using texture profile analysis and rectangular blade cutting methods. Discriminant analysis based on the mechanical properties measured using rectangular blade cutting was performed to develop a classification model. The obtained discriminant model was capable of classifying the papaya samples into five different groups with an accuracy of 82.4%.
Tipo: Info:eu-repo/semantics/article Palavras-chave: Papaya; Classification; Mechanical properties.
Ano: 2016 URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/3472
Imagem não selecionada

Imprime registro no formato completo
Comportement Mécanique de Composites Renforcés de Lamelles de Bambou, Influence du Vieillissement dans l’Eau de Mer ArchiMer
Davies, Peter; Arhant, Mael; Le Gac, Pierre Yves; Le Gall, Maelenn; Kemlin, Guillaume.
There are more than a thousand species of bamboo and some of these contain large amounts of fibres with attractive properties. However, the extraction of the fibres without damaging them is difficult, requiring energy and special equipment. One solution is to use the bamboo in the form of thin strips taken from fibre-rich regions of the plant, as done by the Cobratex company in an innovative process. These contain the fibres but they are protected from damage and keep their alignment. This paper presents the results from a study of bamboo strips, alone and in an infused composite. The influence of seawater immersion is investigated. The composite weight gain is high, around 25 %, but most of the water is in the natural canals of the wood. The influence of...
Tipo: Text Palavras-chave: Bamboo; Density; Mechanical properties; Wet aging.
Ano: 2019 URL: https://archimer.ifremer.fr/doc/00593/70534/68681.pdf
Imagem não selecionada

Imprime registro no formato completo
Compressive strength of corn kernels subjected to drying under different rest periods Rev. Ciênc. Agron.
Mabasso,Geraldo Acácio; Siqueira,Valdiney Cambuy; Quequeto,Wellytton Darci; Resende,Osvaldo; Goneli,André Luís Duarte.
ABSTRACT Mechanical properties of agricultural products are essential for a proper project design or processing equipment dimensioning, as well as for establishment of parameters on the supported load. An experiment was set up in a completely randomized design, with five treatments (continuous and intermittent drying under 4, 8, 12, and 16 h of rest period) and four replications, to evaluate the effect of intermittent drying. Corn kernels of the cultivar Cargo TL were harvested with a moisture content of 25.37% wb and submitted to drying in an experimental fixed bed dryer set to a temperature of 100 °C and an airflow of 1.5 m3 min-1 m-2. Drying was performed until the kernels reached a moisture content of 14±0.3% wb. The process was interrupted in the...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Intermittent drying; Mechanical properties; Rupture force; Hardness; Drying rate.
Ano: 2020 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1806-66902020000400415
Imagem não selecionada

Imprime registro no formato completo
Dégradation de matériaux composites dans un environment marin: Nouveaux materiaux et methodes d'essais ArchiMer
Pomies, F; Carlsson, L; Choqueuse, Dominique; Davies, Peter.
The change in composite material properties when these are exposed to a marine environment is of considerable importance to both designers and users of these materials. In this paper new materials are first studied, composites composed of a glass fibre reinforced thermoplastic PPS matrix. It is shown that their poor interfacial resistance to moisture ingress compromises severely the advantage of using a matrix which does not absorb moisture. In the second part of the paper the application of two non-destructive test techniques for following damage development, based on ultrasonic wave propagation and vibration (modal) analysis, are described. These are complemented by first results from a study using fracture mechanics tests to characterise delamination...
Tipo: Text Palavras-chave: Fractures; Vibration; Epoxy resins; Tests; Materials testing; Mechanical properties; Ultrasonics; Moisture; Ship technology; Composite materials; Mécanique de la rupture; Vibration; Ultrasonique; Thermoplastique; Epoxyde; Humidité.
Ano: 1992 URL: http://archimer.ifremer.fr/doc/1992/acte-1064.pdf
Imagem não selecionada

Imprime registro no formato completo
Determination of selected physical and mechanical properties of Chinese jujube fruit and seed CIGR Journal
Li, Rui; Peng, Jun; Sun, Shipeng; Al-Mallahi, Ahmad; Fu, Longsheng.
Some of physical characteristics and mechanical properties of two widely commercialized varieties of Chinese jujube (Zizyphus jujube cv. junzao and Zizyphus jujube cv. huizao) were studied at 62.2% and 35.4% w.b. for fruits and seeds of junzao and 70.3% and 25.2% w.b. for fruits and seeds of huizao. The results showed that fruits and seeds of junzao were larger in all the dimensions and heavier than that of huizao while the fruits of junzao were smaller in true density, bulk density and porosity than that of huizao. The aspect ratio and sphericity of both cultivars fruits were spherical and more likely to roll than slide. And all the physical parameters measured and calculated of both cultivars fruits and seeds were significant different to each other. The...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Fruit physical and mechanical properties Chinese jujube; Junzao; Huizao; Physical characteristics; Mechanical properties.
Ano: 2016 URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/3738
Imagem não selecionada

Imprime registro no formato completo
Determination of some apricot seed and kernel physical and mechanical properties CIGR Journal
Fayed, Mohamed Ismail Abd El-Ghaffar.
At the duration of this study, a sample of 100 intact apricot fruits, canino variety were selected randomly. The seeds were shelled using a nutcracker and the intact kernels were separated manually. Then, some apricot seed and kernel physical and mechanical properties were determined as relative parameters for designing the apricot seed kernels separator. The obtained results may be summarized as follows:At 7.13% (w.b.) apricot seeds moisture content, the length, width and thickness values were 18.90, 16.48 and 11.31 mm, respectively. The surface area, projected area, volume, arithmetic mean diameter, geometric mean diameter, sphericity and aspect ratio values were 727.09 mm2, 244.60 mm2, 1847.69 mm3, 15.56 mm, 15.20 mm, 80.61 % and 87.53 %, respectively....
Tipo: Info:eu-repo/semantics/article Palavras-chave: Apricot; Canino; Kernel; Physical; Mechanical properties.
Ano: 2020 URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/5729
Imagem não selecionada

Imprime registro no formato completo
Determining of the mechanical properties of unbroken canola pods CIGR Journal
Azadbakht, Mohsen; Ghajarjazi, Ehsan; Ghaderifar, Farshid.
The mechanical properties for the threshing mechanism design, distance setting and the size of thrasher for better threshing and less damage to the seeds were used. In this study the mechanical properties of unbroken pods of canola were investigated including failure force, failure deformation, failure strain, failure energy, toughness, and modulus of elasticity planted in three canola varieties in the fields of Aliabad city in Iran including Hyola 50, 401, and 420 at the three times of sampling in pre-harvest, harvest and post-harvest in two direction of loading (in the direction of small and medium diameter). Canola varieties had different moisture levels at the same time, and this moisture was measured as a sub factor. The results show that moisture...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Canola; Mechanical properties; Canola pod..
Ano: 2015 URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/3350
Imagem não selecionada

Imprime registro no formato completo
Determining the concrete stiffness matrix through ultrasonic testing REA
Gonçalves,Raquel; Giacon Júnior,Milton; Lopes,Igor M..
The determination of the modulus tangent (Eci ) and of the modulus secant (Ecs) of the concrete can be done using compression test but, to be simpler, it is used relations with characteristic strength (f ck). Relations are also used to determine the transversal modulus (Gc) and, in the case of the Poisson's ratio (ν), a fixed value 0.20 is established. The objective of this research was to evaluate the use of the ultrasonic propagation waves to determine these properties. For the tests were used specimens with f ck varying from 10 to 35 MPa. For the ultrasonic tests were used cylindrical and cubic specimens. The modulus of deformation obtained by ultrasound was statistically equivalent to the obtained by compression tests. The results of modules obtained...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Compressive strength; Modulus of deformation; Mechanical properties.
Ano: 2011 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162011000300003
Imagem não selecionada

Imprime registro no formato completo
Development and characterization of edible films based on gluten from semi-hard and soft Brazilian wheat flours (development of films based on gluten from wheat flours) Ciênc. Tecnol. Aliment.
Tanada-Palmu,Patrícia Sayuri; Grosso,Carlos R.F..
Edible films based on gluten from four types of Brazilian wheat gluten (2 "semi-hard" and 2 "soft") were prepared and mechanical and barrier properties were compared with those of wheat gluten films with vital gluten. Water vapor, oxygen permeability, tensile strength and percent elongation at break, solubility in water and surface morphology were measured. The films from "semi-hard" wheat flours showed similar water vapor permeability and solubility in water to films from vital gluten and better tensile strength than the films from "soft" and vital gluten. The films from vital gluten had higher elongation at break and oxygen permeability and also lower solubility in water than the films from the Brazilian wheat "soft" flours. In spite of the vital gluten...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Mechanical properties; Permeability; Vital gluten.
Ano: 2003 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-20612003000200027
Imagem não selecionada

Imprime registro no formato completo
Effect of chitosan nanoparticles and pectin content of mechanical properties and water vapor permeability of banana puree films. Repositório Alice
MARTELLI, M. R.; BARROS, T. T.; MOURA, M. R. de; MATTOSO, L. H. C.; ASSIS, O. B. G..
Tipo: Artigo de periódico Palavras-chave: Banana puree; Chitosan nanoparticles; Purê de banana; Nanopartículas de quitosana; Filmes comestíveis; Propriedades mecânicas; Edible films; Mechanical properties.
Ano: 2013 URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/960537
Imagem não selecionada

Imprime registro no formato completo
Effect of moisture content on physio-mechanical properties of coriander seeds (Coriandrum sativum) CIGR Journal
Sharanagat, Vijay Singh; Goswami, T. K..
Study to determine physical and mechanical properties of seeds at different moisture content is necessary for the design of equipment to handle, process, transport, and store the same.  The physical properties of coriander seeds have been evaluated as a function of seed moisture content, varying from 8% to 16% (w.b.). In the moisture 11.2%, seeds major, minor and medium dimensions were 5.062, 3.27, and 3.404 mm respectively. Sphericity of the seeds was found to be 0.757 with a surface area of 46.167 mm2.  One thousand seed weight increased linearly from 8.89 to 9.826 g when the moisture content increases from 8.5 to 15.89% (w.b.).  The true density of coriander seeds decreased when the moisture content increased 8.73 to 12%, from this point, true density...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Food process engineering physical properties; Mechanical properties.
Ano: 2014 URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/2759
Imagem não selecionada

Imprime registro no formato completo
Effect of recycling on mechanical behaviour of biocompostable flax/poly(L-lactide) composites ArchiMer
Le Duigou, Antoine; Pillin, Isabelle; Bourmaud, Alain; Davies, Peter; Baley, Christophe.
The biocompostability of natural fibre-reinforced biopolymers, also known as biocomposites, makes them an attractive alternative to glass fibre-reinforced petrochemical polymers. The aim of this work is to study the capacity of flax/PLLA (poly(L-lactide)) biocomposite (20% and 30% fibres by weight) to be recycled. Mechanical properties were evaluated initially, and shown to be similar to those of glass/PP and superior to hemp/PP and sisal/PP composites. Then after repeated injection cycles tensile properties were shown to be conserved until the third cycle. Matrix degradation and fibre aspect ratio were followed using molecular weight measurements, thermal and rheological analyses, image analysis of sections and SEM fractography. These techniques revealed...
Tipo: Text Palavras-chave: Mechanical properties; Recycling; Flax fibres; PLLA.
Ano: 2008 URL: http://archimer.ifremer.fr/doc/2008/publication-6360.pdf
Imagem não selecionada

Imprime registro no formato completo
Effect of snake venom derived fibrin glue on the tendon healing in dogs: clinical and biomechanical study J. Venom. Anim. Toxins incl. Trop. Dis.
Ferraro,G. C.; Moraes,J. R.; Shimano,A. C.; Pereira,G. T.; Moraes,F. R.; Bueno de Camargo,M. H..
The aim of this study was to evaluate the effect of snake venom derived fibrin glue on the strength oftendon healing in dogs. The deep digital flexor tendon of the 5th digit of 24 thoracic limbs was partially sectioned for adhesive application. On the 7th, 15th, and 30th postoperative day tendons segments were removed for the clinical and biomechanical study. Results indicated that 62.5% of the tendons showed stump retraction and 20.8% moderate to excessive adherence, which affected gliding. The biomechanical evaluation showed that, over time, tendon healing gained progressive resistance for maximum traction and permanent deformations with satisfactory results on the 15th day for rigidity and resilience compared to the other two studied periods. Snake...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Dog; Fibrin glue; Mechanical properties; Snake venom; Healing; Tendon.
Ano: 2005 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1678-91992005000300005
Imagem não selecionada

Imprime registro no formato completo
Effective engineering properties in the design of storage structures of postharvest dry bean grain Agronomy
Kibar, Hakan; Igdir University; Öztürk, Turgut; Igdir University; Temizel, Kadir Ersin; Ondokuz Mayis University.
Selected engineering properties (physical and mechanical) of dry bean under non-irrigation and drip-irrigation were determined and compared. These properties are necessary for the design of equipments for harvesting, processing, transporting, estimating loads in storage structures for crops and flow problems in silos such as arching, ratholing, irregular flow and segregation. Some engineering characteristics such as: average length, width, thickness, the geometric mean diameter, sphericity, surface area, volume, thousand grain mass (M1000), bulk and true densities, porosity, angle of internal friction, static coefficient of friction, Poisson ratio and pressure ratio were studied. The highest average values for physical properties were recorded at...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Agricultural Engineering dry bean; Physical properties; Mechanical properties; Statistical analysis.
Ano: 2014 URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/19394
Imagem não selecionada

Imprime registro no formato completo
Elaboration and characterization of pectin-gellan films added with concentrated supernatant of Streptococcus infantarius fermentations, and EDTA: effects on the growth of Escherichia coli, Staphylococcus aureus and Listeria monocytogenes in a Mexican cheese medium, and physical-mechanical properties Ciênc. Tecnol. Aliment.
JIMÉNEZ-VILLEDA,Perla-Yesenia; RODRÍGUEZ-HERNÁNDEZ,Adriana-Inés; LÓPEZ-CUELLAR,Ma.-del-Rocío; FRANCO-FERNÁNDEZ,Melitón-Jesús; CHAVARRÍA-HERNÁNDEZ,Norberto.
Abstract Films were prepared with 0.2% (w/v) gellan gum, 1% (w/v) citric pectin, 0.5% (w/v) glycerol, 5 mM CaCl2, 0.05 M Ethylenediaminetetraacetic acid (EDTA), and different concentrations of an antimicrobial activity-concentrated supernatant (AMC) obtained from fermentations of Streptococcus infantarius, which produces bacteriocin-like inhibitory substances (i.e., treatments F1, F2 and F3 with 75, 90 and 120 arbitrary units (AU)/mL, respectively). The treatments were based on a minimum-inhibitory-concentration (i.e., AMC, 90 AU/mL, plus EDTA, 0.05 M) for Escherichia coli, Staphylococcus aureus and Listeria monocytogenes growing in brain-heart-infusion medium at 35 °C. The films hindered the bacterium growth in selective media: E. coli -MacConkey, S....
Tipo: Info:eu-repo/semantics/article Palavras-chave: Lactic acid bacterium; Bacteriocins; Biopreservation; Mechanical properties; Gas permeability.
Ano: 2019 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-20612019000200436
Registros recuperados: 70
Primeira ... 1234 ... Última
 

Empresa Brasileira de Pesquisa Agropecuária - Embrapa
Todos os direitos reservados, conforme Lei n° 9.610
Política de Privacidade
Área restrita

Embrapa
Parque Estação Biológica - PqEB s/n°
Brasília, DF - Brasil - CEP 70770-901
Fone: (61) 3448-4433 - Fax: (61) 3448-4890 / 3448-4891 SAC: https://www.embrapa.br/fale-conosco

Valid HTML 4.01 Transitional