Publish in OALib Journal

ISSN: 2333-9721

APC: Only $99


Any time

2019 ( 3 )

2018 ( 9 )

2017 ( 15 )

2016 ( 19 )

Custom range...

Search Results: 1 - 10 of 5291 matches for " Angela Kwiatkowski "
All listed articles are free for downloading (OA Articles)
Page 1 /5291
Display every page Item
Agronomic traits and chemical composition of single hybrids of sweet corn
Kwiatkowski, Angela;Clemente, Edmar;Scapim, Carlos Alberto;
Horticultura Brasileira , 2011, DOI: 10.1590/S0102-05362011000400015
Abstract: in brazil, the greengrocery market of sweet corn has been expanding along the country. in contrast, there have been few agri-industries canning sweet corn (zea mays) because of the lack of cultivars with agronomic characteristics proper to industrial purposes. the purpose of this study was to evaluate the general combining ability (gca) of seven inbred lines of sweet corn, and the specific combining ability (sca) of their hybrid combinations based on their agronomic traits, and the chemical composition of the grain. in the growing season 2006/2007, twenty-one single hybrids were evaluated in the iguatemi research station, maringá county, northwestern paraná, in brazil using a complete randomized block design with four replications. data were subjected to the analysis of variance and the genotypes were clustered by the scott-knott test. we estimated the gca and sca effects using the griffing's method iv with the fixed model for plant height (ph), height of ear (eh), dehusked ears yield (dey), reducing (rs) and total sugars (ts), starch (st), proteins (ptn), ether extract (ee) and fibers (fb). the inbred line l4, which was originated from the 'doce de cuba', had the best gca for crop yield and grain quality and therefore should be used in the next hybrid combinations. the hybrids l4xl5 and l3xl7 were the most promising with regard to crop yield and grain quality.
Polyphenoloxidase and peroxidase in avocado pulp (Persea americana Mill.)
Vanini, Lucimara Salvat;Kwiatkowski, Angela;Clemente, Edmar;
Ciência e Tecnologia de Alimentos , 2010, DOI: 10.1590/S0101-20612010000200036
Abstract: the aim of the present investigation was to evaluate the enzymatic activity of polyphenoloxidase and peroxidase in avocado pulps, from the northwest area of paraná-brazil, in order to compare the varieties on their enzymatic activity for both, minimum and industrial processing. enzymatic extracts were prepared from avocado pulp of choquete, fortuna and quintal varieties, in green and ripe maturation stage. thermal treatment was applied with temperatures 60, 65, 70, 75 and 80 °c. the enzymatic activities were determined by using spectrophotometer. a decline of polyphenoloxidase activity was observed in all of the varieties when both, temperature and time increased. total inactivation of enzymes was not observed in the largest temperature. fortuna and choquete variety showed the lowest polyphenoloxidase activity in the ripe stage. soluble peroxidase showed activity in the green stage, whereas, ionically bound peroxidase activity increased with the change from green to ripe maturation stage in choquete variety.
Post-harvest conservation of organic strawberries coated with cassava starch and chitosan
Campos, Raquel P;Kwiatkowski, Angela;Clemente, Edmar;
Revista Ceres , 2011, DOI: 10.1590/S0034-737X2011000500004
Abstract: the strawberry is as non-climacteric fruit, but has a high post-harvest respiration rate, which leads to a rapid deterioration at room temperature. this study aimed to evaluate the application of biodegradable coating on postharvest conservation of organic strawberries, cv. camarosa, packed in plastic hinged boxes and stored at 10oc. the treatments consisted of: a) control; b) 2% cassava starch; c) 1% chitosan; and d) 2% cassava starch + 1% chitosan. physical and chemical characteristics of fruits were evaluated at 3, 6 and 9 days of storage, and microbiological and sensory analyses were carried out at the end of the storage period. the treatments influenced positively the post-harvest quality of organic strawberries. the coating cassava starch + chitosan provided the best results, with less than 6% of loss in fruit mass, lower counts of yeast and psychrophilic microorganisms and the best appearance according to the sensory analysis.
Physical-chemical and Microbiological Characteristics of Organic Strawberries Conserved with Biofilms and Refrigeration
Raquel Pires Campos,Angela Kwiatkowski,Carolina Dario Tonhi,Edmar Clemente
Journal of Food Research (JFR) , 2012, DOI: 10.5539/jfr.v1n3p247
Abstract: Biodegrabable and edible coatings were applied on fresh strawberries (Fragaria x ananassa Duch), ‘Camarosa cultivar’, produced in organic system and stored at 10oC for nine days. Color, mass loss, incidence of rottenness and chemical analyses contents was evaluated. Suspension of cassava starch and grains of kefir milk reduced evolution of fruit coloration when compared uncoated fruits. Treatment associated cassava starch and kefir liquid resulted in a lower rottenness incidence and less mass loss of the fruits, is therefore recommended for postharvest organic strawberries. Anthocyanin and titrable acidity contents increased during storage, regardless of the treatments in general.
Phase-Space Areas of the Body Motion in the Solar System Deduced from the Bohr-Sommerfeld Atomic Theory and Approximate Invariance of Their Ratios for the Pairs of Planets and Satellites  [PDF]
Stanislaw Olszewski, Tadeusz Kwiatkowski
Journal of Modern Physics (JMP) , 2012, DOI: 10.4236/jmp.2012.329149
Abstract: Energy-time and momentum-position phase spaces defined by the electron orbits in the hydrogen-like atom exhibit special properties of equivalence. It is demonstrated that equivalence of the same kind can be obtained for the phase-space areas defined by the orbit pairs of planets, or satellites, which compose the solar system. In the choice of the examined areas it is useful to be guided by the Bohr-Sommerfeld atomic theory.
Biodegradable coatings on the postharvest of blackberry stored under refrigeration
Oliveira, Dalany Menezes;Rosa, Cassia Ines Lourenzi Franco;Kwiatkowski, Angela;Clemente, Edmar;
Revista Ciência Agron?mica , 2013, DOI: 10.1590/S1806-66902013000200012
Abstract: blackberry is a notable fruit due to bioactive compounds. however it has a fragile structure, which reduces the consumption in natura. the aim of this study was to evaluate the physical and chemical quality of the cv. tupy blackberry fruits, produced in an organic system, and coated with emulsions based on cassava starch and water kefir grains stored under refrigeration. the fruits were divided into three groups: a control (t1) and two treatments with coatings. the coatings used were: cassava starch solution 2.5% (t2); water kefir grains at 20% (t3). the fruits of the three treatments were stored at 10 ± 2 oc and rh 85 ± 3%, and were evaluated every three days for 12 days period. it was determined: weight loss, firmness, ph, titratable acid, soluble solids, ratio, anthocyanins and decay incidence. the results for the chemical features showed statistical differences (p>0.05) except for the ph value at the end of the storage. there were differences between crop for all parameters. during the storage period, the anthocyanin content increased on the 2008 crop and reduced on the fruits of 2009. to reduce the decay incidence it is recommended to use the coating with kefir grains. these fruits can be consumed until the third day of storage at 10 oc.
Chemical evaluation of pulp and residue pulp of organic blackberry, cv. Tupy.
Angela Kwiatkowski,Gislaine Fran?a,Dalany Menezes Oliveira,Cássia Inez Lourenzi Franco Rosa
Revista Brasileira de Pesquisa em Alimentos , 2011,
Abstract: The objective of this study was to evaluate the pulp and the residue pulp of blackberry (Rubus spp), cultivar Tupy, produced in organic system. The concentrations of phenolic compounds, anthocyanins, total soluble solids (TSS), titratable acidity (TTA), TSS/TTA and vitamin C were analysed. The results of phenolic compounds and anthocyanins ranged from 41.94 to 91.23 and from 103.00 to 150.32 mg/100 g, respectively. For both samples SST resulted in 8.60, 8.00 and 7.85 °Brix fruit, pulp and residue pulp respectively. ATT ranged from 0.286 to 0.315 g/citric acid L, and for whole fruit and pulp residue, respectively. The content of vitamin C was lower for the residue pulp analysis. The values of TSS and TTA did not differ significantly by Tukey test (p> 0.05). From these results we can make the inference that the residue pulp of blackberry cv. Tupy, produced in an organic system, has the amount of anthocyanins and compounds that can be used by the industry as a source for food enrichment.
Microbiological quality study of Apis mellifera honey produced in the "Cerrado" – MT
Dayane Aparecida dos Santos,Angela Kwiatkowski,Marcos Vieira da Silva,Dalany Menezes
Revista Brasileira de Pesquisa em Alimentos , 2011,
Abstract: Monitoring the microbiology of honey is necessary to ensure its final quality. The microbial contamination is a danger to public health, a major concern for the surveillance agency. The objective of this study was to evaluate the microbiological quality of honey produced in the cerrado region, Mato Grosso State. The apiary was installed in the town of Conquista D'Oeste city, a total of 30 boxes of honey covered with asbestos tile and exposed to the sun. The honey was collected in November of 2008. The physical and chemical analysis were carried out: moisture, total soluble solids (TSS) and pH. Microbiological analysis were: mesophilic bacteria facultative aerobic, yeast and mold, Staphylococcus, the most probable number (MPN) of coliforms at 35oC and 45oC, and the presence of Salmonella sp. The methods used followed the directions of the Normative Instruction no. 62, August 23, 2003 of Ministério da Agricultura, Pecuária e Abastecimento - MAPA. The pH value resulted in 3.80, SST at 81.5 and humidity at 17 %. Microbiological analysis showed no presence of Salmonella, Staphylococcus and yeast. The count of facultative aerobic bacteria was 5.0 x 101, the two groups of coliforms in NMP was <3.0, and 3.0 x 101 mold. The samples of honey studied showed appropriate microbiological quality.
Mineral evaluation of honey of Africanized Apis Mellifera
Dalany Menezes Oliveira,Cassia Inês Lourenzi Franco Rosa,Angela Kwiatkowski,Edmar Clemente
Revista Brasileira de Pesquisa em Alimentos , 2011,
Abstract: Honey contains small amounts and a wide variety of vitamins, minerals, aminoacids and antioxidants. Mineral content includes calcium, copper, iron, magnesium, manganese, phosphorus, potassium and zinc. The objective of this study was to quantify the amount of ash and minerals in the honey collected in the states of Mato Grosso and S o Paulo. It was evaluated the mineral and ashes contents of the honey of Africanized Apis mellifera from the Brazilian cerrado in the city of Conquista D'Oeste-(MT), and of the beehives located in a cassava plantation on the border of the cities of Marília and Ocau u - SP. The combs were centrifuged and decanted for 48 hours, then packed in nontoxic plastic and sent to the Laboratory of Food Biochemistry DQI / UEM. The determination of minerals of honey was done by atomic absorption spectrometry. The ashes were obtained from the incineration of the samples in muffle furnace heated to 600 o C. The results were: ash 0.06 and 0.44%, the minerals in g / kg Ca 0.043 and 0.386, 0.060 and 0.210 Mg, 0.376 and 2.11 K, 0.050 and 0.014 P, 0.011 and 0.005 Cu, for cerrado and cassava honey respectively. The honey in the region of S o Paulo state had ash and minerals in larger quantities. This is due to the different vegetation and nature of the soil of the regions studied.
Physical-chemical evaluation of pequi pulp crude oil
Andressa Ferraz dos Santos,Marcos Vieira da Silva,Angela Kwiatkowski,Edmar Clemente
Revista Brasileira de Pesquisa em Alimentos , 2011,
Abstract: Pequi (Caryocar brasiliense Camb.) is a fruit from Brazilian “cerrado”, whose pulp has a substantial oil content, which represents great economic, nutritional and sensory importance. This oil is mainly constituted by saturated and monounsaturated fatty acids, which gives it a good oxidating stability. The aim of this study was to evaluate the pequi pulp crude oil regarding its quality as comestible vegetable oil. The oil was purchased from the state of Minas Gerais, and subjected to physical and chemical analysis for proper characterization. The results for acid value (3.23 mg KOH/ g), peroxide (11.16 meq/1000 g) saponification (97.58 mg KOH/ g), iodine (60.39%), index of refraction (1.4613), moisture content (1.00%), and instrumental color (L = 64.00 a * = 23.57 b * = 68.04) showed that the pequi pulp crude oil was in good condition, according to current legislation requirements, and with characteristics similar to those previously reported. Thus, the pequi pulp crude oil was qualified as suitable for human consumption, considering the adopted forms of assessment.
Page 1 /5291
Display every page Item

Copyright © 2008-2017 Open Access Library. All rights reserved.