Consulta: subjectFacets:"Mechanical damage"
Registros recuperados: 16
Data/hora: 09/06/2024 11:20:28

CAN DOSING MECHANISMS AFFECT THE PHYSICAL QUALITY OF CORN SEEDS AT DIFFERENT SEEDING SPEEDS?
Provedor de dados: 196
Autores: Parizotto, Nayara Francieli; Carpes Marques Filho, Aldir; Munhoz  Venâncio de Oliveira, Marcelo; Pereira de Souza, Flavia Luize; Arbex Silva, Paulo Roberto.
Corn (Zea mays L.) is one of the main commodities of Brazilian agribusiness, however, the sowing operation of this crop still presents challenges related to the performance of the metering mechanisms and operational speed, since these can affect the physical quality of the seeds and impair germination. The aim of this study was to evaluate the physical quality of maize seeds as a function of different metering mechanisms and operational speeds in a controlled sowing trial. The experiment was carried out at the State University, UNESP/Botucatu-SP, using five commercial models of seed dosers at four operational sowing speeds. The results showed that the metering model and the operational speed directly affected the physical quality of the corn seeds,...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Plantability; Mechanical damage; Distribution systems; Seeding; Plantabilidade; Dano mecânico; Sistemas de distribuição; Semeadura.
Ano: 2022
URL: http://periodicosonline.uems.br/index.php/agrineo/article/view/6823

Construcción y evaluación de un prototipo para estudiar en postcosecha, la aplicación de esfuerzos dinámicos en durazno.
Provedor de dados: 32
Autores: Victoria Escamilla, María Guadalupe.
Los frutos de durazno (Prunus persica) tienen corta vida de anaquel, su actividad metabólica se ve afectada por la presencia de daños mecánicos, este daño físico puede ser causado por impacto o vibraciones durante el transporte y en general el manejo después de cosechar las frutas, provocando en general pérdidas de hasta 40% en su mayoría. En este trabajo se diseñó, fabricó y evaluó un prototipo de simulación de esfuerzos dinámicos en durazno. Se evaluaron dos variedades de durazno (Paquimé y Oro de Tlaxcala), a diferentes grados de madurez y se aplicaron diferentes cargas (Paquimé testigo 0, 14 y 50 kg; Oro testigo 0, 50 y 100 kg). Se midió la pérdida de peso, firmeza, sólidos solubles totales, color y respiración por flujo dinámico. Se utilizaron con...
Palavras-chave: Prunus persica; Esfuerzos dinámicos; Cargas; Postcosecha; Daño mecánico; Dynamic stresses; Loads; Postharvest; Mechanical damage; Fruticultura; Maestría.
Ano: 2012
URL: http://hdl.handle.net/10521/783

Construcción y evaluación de un prototipo para estudiar en postcosecha, la aplicación de esfuerzos dinámicos en durazno.
Provedor de dados: 32
Autores: Victoria Escamilla, María Guadalupe.
Los frutos de durazno (Prunus persica) tienen corta vida de anaquel, su actividad metabólica se ve afectada por la presencia de daños mecánicos, este daño físico puede ser causado por impacto o vibraciones durante el transporte y en general el manejo después de cosechar las frutas, provocando en general pérdidas de hasta 40% en su mayoría. En este trabajo se diseñó, fabricó y evaluó un prototipo de simulación de esfuerzos dinámicos en durazno. Se evaluaron dos variedades de durazno (Paquimé y Oro de Tlaxcala), a diferentes grados de madurez y se aplicaron diferentes cargas (Paquimé testigo 0, 14 y 50 kg; Oro testigo 0, 50 y 100 kg). Se midió la pérdida de peso, firmeza, sólidos solubles totales, color y respiración por flujo dinámico. Se utilizaron con...
Palavras-chave: Prunus persica; Esfuerzos dinámicos; Cargas; Postcosecha; Daño mecánico; Dynamic stresses; Loads; Postharvest; Mechanical damage; Fruticultura; Maestría.
Ano: 2012
URL: http://hdl.handle.net/10521/783

Sowing performance by a metering mechanism of continuous flow in different slope conditions
Provedor de dados: 70
Autores: CORREIA,TIAGO P. DA S.; SOUSA,SAULO F. G. DE; SILVA,PAULO R. A.; DIAS,PATRÍCIA P.; GOMES,ANDERSON R. A.
ABSTRACT One of the reasons for the success of a productive culture is the correct sowing. Therefore, the seeds must be properly dosed, deposited and not damaged by the metering mechanism of the seed drill. So, the aim of this study was to evaluate in a simulator the sorghum seed deposition by a metering mechanism with continuous flow in different conditions of slope and sowing speed, and evaluate the quality of the deposited seeds assessing mechanical damage and germination. The experiment was carried out at the College of Agricultural Sciences, UNESP in Botucatu-SP, being used a simulator equipped with seed metering mechanism of helical channelled rotor type. The experimental design was randomized in a 3 x 2 factorial arrangement with six replications....
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Deposition; Germination; Mechanical damage; Sowing.
Ano: 2016
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162016000500839

Respiratory activity and browning of minimally processed sweet potatoes
Provedor de dados: 75
Autores: Moretti,Celso L.; Araújo,Alessandra L.; Marouelli,Waldir A.; Silva,Washington L.C.
Sweet potatoes (Ipomoea batatas L.), 'Brazlândia Roxa', 'Brazlândia Branca' and 'Princesa' were harvested at optimum maturity to evaluate respiratory activity and browning susceptibility of minimally processed roots. After harvest, non-blemished roots were graded for size (18±2cm) and diameter (5±1cm), and minimally processed inside a cold room. Processed roots were placed in sealed glass jars and stored at 3±0.5°C to evaluate respiratory activity during a 4-hour period or were packed in plastic films with partial vacuum to evaluate development of browning. Packages were stored under refrigerated conditions (3±0.5°C) for 5 days. Daily, minimally processed roots were evaluated for browning according to a scale ranging from 0 (extremely browned) to 5 (no...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Ipomoea batatas; Carbon dioxide; Mechanical damage; Polyphenoloxidase; Postharvest; Sensory analysis; Storage.
Ano: 2002
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-05362002000300020

Teste do hipoclorito de sódio para determinação da ocorrência de microfissuras no tegumento da semente de soja.
Provedor de dados: 14
Autores: KRZYZANOWSKI, F. C.; FRANÇA-NETO, J. B.; OLIVEIRA, G. R. F. de; HENNING, F. A.
Tipo: Folhetos
Palavras-chave: Sódio; Tegumento; Soja; Teste de Sementes; Tratamento de Semente; Dano; Soybeans; Mechanical damage.
Ano: 2023
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/1151929

Elastic stresses and plastic deformations in 'Santa Clara' tomato fruits caused by package dependent compression
Provedor de dados: 86
Autores: PEREIRA,ADRIANA VARGAS; CALBO,ADONAI GIMENEZ.
The objective of this work was to study the fruit compression behavior aiming to develop new tomato packages. Deformations caused by compression forces were observed inside packages and in individual 'Santa Clara' tomato fruit. The forces applied by a transparent acrylic lever to the fruit surface caused pericarp deformation and the flattened area was proportional to the force magnitude. The deformation was associated to the reduction in the gas volume (Vg), caused by expulsion of the air from the loculus cavity and reduction in the intercellular air volume of the pericarp. As ripening advanced, smaller fractions of the Vg reduced by the compressive force were restored after the stress was relieved. The lack of complete Vg restoration was an indication of...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Lycopersicon esculentum; Mechanical damage; Porosity; Storage losses.
Ano: 2000
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2000001200014

Bean grain hysteresis with induced mechanical damage
Provedor de dados: 91
Autores: Campos,Renata C.; Corrêa,Paulo C.; Fernandes,Lara S.; Baptestini,Fernanda M.; Costa,Cristian F.; Bustos-Vanegas,Jaime D.
ABSTRACT This study aimed to evaluate the effect of mechanical damage on the hysteresis of beans with induced mechanical damage under different conditions of temperature and relative humidity. Beans (Phaseolus vulgaris L.) harvested manually with 35% water content (w.b.) were used. Part of this product was subjected to induced mechanical damage by Stein Breakage Tester and controlled drying (damaged and control sample), for sorption processes. The sorption isotherms of water were analyzed for different temperature conditions: 20, 30, 40 and 50 oC; and relative humidity: 0.3; 0.4; 0.5; 0.7 and 0.9 (decimal). Equilibrium moisture content data were correlated with six mathematical models, and the Modified Oswin model was the one that best fitted to the...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Mechanical damage; Equilibrium moisture content; Sorption isotherms; Mathematical modeling; Phaseolus vulgaris L.
Ano: 2016
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662016001000930

Quantitative and qualitative loss of tomato fruits during mechanized harvest
Provedor de dados: 91
Autores: Machado,Túlio de A.; Fernandes,Haroldo C.; Megguer,Clarice A.; Santos,Nerilson T.; Santos,Fabio L.
ABSTRACT The use of mechanization in the harvesting of industrial tomatoes provides greater yield and speed of this stage. However, mechanical intervention in this process may alter the physiology of harvested fruits. Therefore, the objective of this study was to measure the quantitative losses of tomato fruits and to verify the physico-chemical behavior of fruits harvested based on physicochemical analysis in harvesters with different hours of use. Three self-propelled harvesters of the same brand and model with different working hours were used. Manually selected or undamaged fruits were harvested; afterwards, mechanized harvesting was carried out. Firmness, titratable acidity, soluble solids content (°Brix), pH, weight loss and fruit status...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Mechanical damage; Postharvest; Solanum lycopersicum L.
Ano: 2018
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662018001100799

Physical and physiological quality of soybean seeds at three speeds of the harvester
Provedor de dados: 91
Autores: Paixão,Carla S. S.; Chrispin,Camila P.; Silva,Rouverson P. da; Girio,Lucas A. S.; Voltarelli,Murilo A.
ABSTRACT The mechanized harvesting of soybean is a fundamental tool in the production process of this crop and, if not performed properly, it can result in severe mechanical damage to the seeds, causing significant losses at harvest, particularly due to reduced quality. Thus, this study aimed to evaluate the physical and physiological quality of soybean seeds at three speeds of the harvester, using statistical process control. The experiment was carried out in the municipality of Conceição das Alagoas, MG, Brazil, with three travel speeds: 4.5, 5.0 and 5.5 km h-1. The seed samples were collected at 20 min intervals for 3 h of operation, with a total of 9 samples for each speed. The evaluations were performed based on the following parameters: grain...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Glycine max (L.) Merrill; Mechanical damage; Vigor; Control charts.
Ano: 2017
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662017000300214

PHYSICAL-CHEMICAL QUALITY OF MANGO ‘Ubá’ (Mangifera indica L.) FRUITS SUBMITTED TO IMPACT MECHANICAL DAMAGE AT HARVEST
Provedor de dados: 94
Autores: PACHECO,ANÁLIA LÚCIA VIEIRA; BORGES,KARINA SCHULZ; VIEIRA,GERIVAL; FREITAS,GILBERTO BERNARDO DE; CECON,PAULO ROBERTO.
ABSTRACT  The objective of this study was to evaluate the quality of ‘Ubá’ mango fruit submitted to mechanical damage. The fruits were harvested in the 2012/2013 harvest, and let to drop once on a flat, hard surface, simulating the harvesting process of ‘Ubá’ mango, which is to drop all the fruits of a plant when they are physiologically mature. Treatments consisted of different drop heights (zero, one, two, three, four and five meters), totaling six treatments. After the fall, the fruits were submitted to ripening, and then evaluated for fresh mass loss (FML), presence of external lesions (PEL), presence of internal lesions (PIL), soluble solids content (SS),titratable acidity (TA), pH, SS/TA ratio and vitamin C. There was no difference between fresh...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Harvest; Mango for industry; Mechanical damage; Pulp quality.
Ano: 2017
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-29452017000200305

Road transport vibration stress impact on ‘Palmer’ mangoes quality and shelflife
Provedor de dados: 94
Autores: Costa,Josenara Daiane de Souza; Figueiredo Neto,Acácio; Olivier,Nelson Cárdenas; Irmão,Marcos Antônio da Silva; Costa,Marylia de Sousa; Gomes,Josivanda Palmeira.
Abstract Studying the causes of postharvest fruit loss is important to avoid reduction of quality and quantity for the consumer due, for example, to the influence of frequent impacts from vibrations during transportation. In this sense, this study evaluates the storage quality of ‘Palmer’ mangoes after being subjected to different simulated road transport vibrations. Vibration was simulated from the analysis of the profile of the frequencies generated in road transport of fruit, determined in a tractor trailer. ‘Palmer’ mangoes stored after vibration stress wereevaluated for: mass loss, absorbance difference index (IAD), peel and pulp browning index (BI), pulp firmness, soluble solids content, and titratable acidity. The development of a vibration machine...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Simulated transport; Postharvest losses; Fruit; Mechanical damage; Browning index.
Ano: 2021
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-29452021000200301

Effect of grain moisture  and clearance of machine on mechanical damage of processed paddy
Provedor de dados: 111
Autores: Alwan, salih kadhim.
The effect of  clearance in husking machine (Satake BK40 type) on paddy cultivar of Amber 31 (AM31)  were tested during husking at three clearance of 0.5,0.7and 0.9 mm and two grains moisture 9-11% and 11-13%  .The experiments were carried out in a factorial experiment under complete randomized design with three replications. The results showed that the 9-11% grain moisture was significantly better than the 11-13% grain moisture in all studied conditions. The results showed a machine productivity of 1.707 and 1.441 th-1, power consumption of 13.585 and 14.800 kW, husking efficiency of 83.478% and 81.979%, milling recovery of 69.848 and68.794% ,head paddy of 68.086 and 66.221 %, and broken paddy of 6.226 % and 7.471 % , for 9-11% and 11-13%, respectively....
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Mechanical damage; Processed paddy; Clearance; Husking; Grain moisture .
Ano: 2022
URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/6473

Development of an active evaporative cooling system for short-term storage of fruits and vegetable in a tropical climate
Provedor de dados: 111
Autores: Chinenye, Ndukwu Macmanus; Manuwa, S. I.; Olukunle, O. J.; Oluwalana, I. B.
An active evaporative cooler for short-term storage of fruits and vegetable has been developed to improve the shelf life of fruits and vegetables for small holder farmers in Southern Nigeria.  The evaporative cooler uses palm fruit fiber as cooling pad material which is considered a waste in palm oil production in Nigeria and consists of three suction fan, automatic water control switch, water pump and evaporative cooling chambers.  The performance of cooler was evaluated in terms of temperature drop, efficiency of the evaporative cooling and cooling capacity.  The temperature drop ranged from 40C to 130C while the relative humidity of the ambient air was increased to 96.8%.  The cooler could drop the temperature close to wet bulb depression of ambient air...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Agricultural engineering cowpea; Mechanical damage; Moisture content; Threshing efficiency; Variety.
Ano: 2013
URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/2655

Performance evaluation of motorized and treadle cowpea threshers
Provedor de dados: 111
Autores: Timothy, Adekanye Adesoye; Olaoye, Joshua Olanrewaju.
 A motorized thresher and a treadle cowpea thresher were evaluated in terms of threshing efficiency (%), throughput capacity (kg h-1), cleaning efficiency (%), mechanical damage (%) and percentage loss (%) for three commonly grown cowpea varieties in Nigeria.  The three varieties were 994, IAR48 and TVX.  The cylinder concave clearances were fixed at 13, 12 and 11 mm based on the major diameter of each cowpea variety.  The investigation was conducted at three levels of moisture contents (12.5%, 15% and 17% wet basis).  Evaluation results indicated that for motorized thresher threshing efficiency varied from 71.4 to 82.86%, 73.56 to 87.14% and 77. 63 to 88.57% while for treadle thresher threshing efficiency varied from 20.50 to 24.29%, 21.50 to 25.71% and...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Agricultural and biosystems Engineering cowpea; Mechanical damage; Moisture content; Threshing efficiency; Variety.
Ano: 2013
URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/2693

Does mechanical damage on soybean induces the production of flavonoids?
Provedor de dados: 42
Autores: SILVA,PAULO LUIZ DA; CORDEIRO,GLÁUCIA; SILVA,CAROLINA R. DA; BARROS,RAFAEL A.; SILVA,CAMILA R. DA; ZANUNCIO,JOSÉ C.; CAMPOS,WELLINGTON G.; OLIVEIRA,MARIA G.A.
Abstract The response of plants to grazing includes the production of chemical defense compounds such as proteases inhibitors and secondary metabolites as flavonoids, which makes them less palatable to feeding and negatively affecting the physiology of insects. The aim of this study was to evaluate the phytochemical response of soybean cultivars (Glycine max (L.) Merrill) resistant (IAC-17, IAC-24) and susceptible (IAC-P1) to insects after mechanical damage. These cultivars were mechanically injured, and after 24 hours samples of these plants were analyzed by HPLC to identify and quantify flavonoids. The flavonoids daidzein, quercetin, and rutin were quantified, with the highest concentration of daidzin in soybean cultivars after mechanical damage. Rutin...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Glycine max; Flavonoid; Herbivory; Mechanical damage; Secondary metabolite.
Ano: 2018
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652018000703415