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A MEZŐGAZDASÁGI JÖVEDELMEK STABILITÁSA AgEcon
Lamfalusi, Ibolya.
A mezőgazdasági jövedelmek stabilitásának megteremtése mindenkor az ag-rárpolitika fontos törekvése. A mezőgazdaságból élőknek a termelői jövedelem nagysága és alakulása meghatározza a gazdálkodói életszínvonal minőségét. Az EU országok jövedelemstabilitási mutatóival összevetve a magyar mezőgazda-ságét meg¬állapítható, hogy a hazai gazdálkodók helyzete igen kedvezőtlen. Az ágazatban mind a nominális értéken vett jövedelem stabilitása, mind pedig a jövedelem re¬ál¬értéke kedvezőtlenül alakult. A reáljövedelem 1998 és 2005 között egyetlen évben sem érte el az 1998. évi 80%-át, sőt 2003-ban 50%-nál kevesebb volt. A mezőgazdasági termelés jövedelemstabilitását a mezőgazdasági kibocsátás kiegyensúlyozottsága határozza meg alapvetően. A kibocsátás már magában...
Tipo: Journal Article Palavras-chave: Jövedelem; Stabilitás; Instabilitás; EU; Mezőgazdaság; Income; Stability; Instability; EU; Rural economy; Agricultural and Food Policy; Community/Rural/Urban Development; Production Economics.
Ano: 2007 URL: http://purl.umn.edu/57674
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A new approach for obtaining rapid uniformity in rice (Oryza sativa L.) via a 3x x 2x cross Genet. Mol. Biol.
Xing,Shaochen; Cai,Yuhong; Zhou,Kaida.
A triploid (2n = 3x = 36) rice plant was obtained by screening a twin seedling population in which each seed germinated to two or three sprouts that were then crossed with diploid plants. One diploid plant was chosen among the various F1 progenies and developed into an F2 population via self-pollination. Compared with the control variety Shanyou 63, this F2 population had a stable agronomical performance in field trials, as confirmed by the F-test. The stability of the F2 population was further substantiated by molecular analysis with simple sequence repeat markers. Specifically, of 160 markers assayed, 37 (covering all 12 chromosomes) were polymorphic between the parental lines. Testing the F1 hybrid individually with these markers showed that each PCR...
Tipo: Info:eu-repo/semantics/article Palavras-chave: F-test; Polyploidy; Rice; SSR marker; Stability.
Ano: 2010 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572010000200020
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A new biosurfactant produced by Candida glabrata UCP 1002: characteristics of stability and application in oil recovery BABT
Luna,Juliana Moura de; Sarubbo,Leonie; Campos-Takaki,Galba Maria de.
The production of a new biosurfactant by Candida glabrata UCP1002 was studied to evaluate the influence of the concentration of the cotton seed oil, glucose and yeast extract. The dynamics of the growth and surfactant production were showed for all the cultivation conditions studied. The best emulsification of the n-hexadecane, quantified by the emulsifying index was observed in the medium containing 7.5% cotton seed oil, 5% glucose and 0.3% yeast extract. The isolated biosurfactant showed a CMC of 2.5% and the surface tension at that point showed to be 31mN/m. The potential application of the biosurfactant in oil recovery from the sand, in acid and alkaline environments and over exposure to high salinity and different temperatures was demonstrated by the...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Biosurfactant; Candida glabrata; Surface tension; Stability; Cotton seed oil; Oil removal.
Ano: 2009 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132009000400001
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A stability-indicating HPLC-PDA method for the determination of ferulic acid in chitosan-coated poly(lactide-co-glycolide) nanoparticles BJPS
Lima,Isabela Angeli de; Khalil,Najeh Maissar; Mainardes,Rubiana Mara.
ABSTRACT The development and validation of a simple and efficient method for the quantification of ferulic acid in poly (D,L-lactide-co-glycolide) (PLGA) nanoparticles coated with chitosan (CS) by reverse phase high performance liquid chromatography coupled to photodiode array detection was described. For the chromatographic analysis, a reverse phase C-18 column was used, mobile phase consisting of acetonitrile and 0.5% acetic acid (37:63, v/v), isocratically eluted at a flow rate of 1 mL/min. Drug determination was performed at 320 nm. The method was validated in terms of the selectivity, linearity, precision, accuracy, robustness, limits of detection and quantification. The method was linear in the range of 10 to 100 μg/mL (r=0.999) and presented limit...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Nanoparticles; Ferulic acid/encapsulation efficiency; Ferulic acid/quantification; Stability; High performance liquid chromatography/validation; PLGA-poly(lactide-co-glycolide)/nanoparticles; Chitosan..
Ano: 2017 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1984-82502017000200627
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Activity and Stability of Dispersed Multi Metallic Pt-based Catalysts for CO Tolerance in Proton Exchange Membrane Fuel Cell Anodes Anais da ABC (AABC)
HASSAN,AYAZ; TICIANELLI,EDSON A..
ABSTRACT Studies aiming at improving the activity and stability of dispersed W and Mo containing Pt catalysts for the CO tolerance in proton exchange membrane fuel cell (PEMFC) anodes are revised for the following catalyst systems: (1) a carbon supported PtMo electrocatalyst submitted to heat treatments; (2) Pt and PtMo nanoparticles deposited on carbon-supported molybdenum carbides (Mo2C/C); (3) ternary and quaternary materials formed by PtMoFe/C, PtMoRu/C and PtMoRuFe/C and; (4) Pt nanoparticles supported on tungsten carbide/carbon catalysts and its parallel evaluation with carbon supported PtW catalyst. The heat-treated (600 oC) Pt-Mo/C catalyst showed higher hydrogen oxidation activity in the absence and in the presence of CO and better stability,...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Heat treatment; CO tolerance; Stability; Carbides; Quaternary catalysts.
Ano: 2018 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652018000200697
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Activity of encapsulated Lactobacillus bulgaricus in alginate-whey protein microspheres BABT
Chen,Meng-Yan; Zheng,Wei; Dong,Qiu-Yue; Li,Zhen-Hua; Shi,Lu-E; Tang,Zhen-Xing.
In this work, alginate-whey protein was used as wall materials for encapsulating Lactobacillus delbrueckii subsp. bulgaricus (L. bulgaricus). The characteristics of encapsulated and free L. bulgaricus showed that the free L. bulgaricus lost viability after 1 min exposure to simulated gastric fluid (SGF) at pH 2.0 and 2.5. However, the viability of encapsulated L. bulgaricus did not decrease in SGF at pH 2.5 for 2 h incubation. The viable numbers of encapsulated L. bulgaricus decreased less than 1.0 log unit for 2 h incubation in SGF at pH 2.0. For bile stability, only 1.2 log units and 2.0 log units viability of the encapsulated L. bulgaricus was lost in 1 and 2% bile for 1 h exposure, respectively, compared with no survival of free L. bulgaricus under the...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Encapsulation; Alginate; Whey protein; Probiotics; Stability.
Ano: 2014 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132014000500736
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Amylase production by solid-state fermentation of agro-industrial wastes using Bacillus sp. BJM
Saxena,Rajshree; Singh,Rajni.
Solid state fermentation was carried out using various agro- industrial wastes with the best amylase producing strain isolated from soil. Different physicochemical conditions were varied for maximum enzyme production. The strain produced about 5400 units/g of amylase at 1:3 moisture content, 20% inoculum, after 72 h of incubation with Mustard Oil seed cake as the substrate. The optimum temperature and pH of the enzyme activity were found to be 50ºC and 6 respectively. The enzyme was found to be thermostable at 70ºC for about 2 h without any salt. It showed stability at pH range 5-7. The metal ions as Na+, Ca++, Mg++ and Co++ enhanced the enzyme activity.
Tipo: Info:eu-repo/semantics/article Palavras-chave: Solid State Fermentation; Agro-industrial wastes; Amylase; Enzyme optimization; Stability; Bacillus sp.
Ano: 2011 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822011000400014
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Análise da estabilidade do rendimento em cultivares de caupi (Vigna unguiculata (L.) Walp.) na região amazônica. Infoteca-e
OLIVEIRA, A. F. F. de; BARRIGA, R. H. M. P.; PEREIRA, I. C. M..
bitstream/item/31908/1/CPATU-BP37.pdf
Tipo: Séries anteriores (INFOTECA-E) Palavras-chave: Caupi; Estabilidade; Maranhao; Pará; Amapa; Brasil; Cowpea; Stability; Variety; Revenue.; Rendimento; Variedade; Vigna Unguiculata.; Amazonia..
Ano: 1982 URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/382453
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Aptitud combinatoria y estabilidad de líneas de alto rendimiento derivadas de maíz exótico tropical. Colegio de Postgraduados
Pérez López, Francisco Javier.
Para generar híbridos de maíz (Zea mays L.) de cruza simple de manera rentable, es necesario que las líneas progenitoras hembras sean de alto rendimiento y que los híbridos generados, así como sus líneas parentales muestren buena estabilidad y adaptación ante los cambios en los ambientes de producción. El objetivo de este trabajo fue estimar la aptitud combinatoria general y aptitud combinatoria específica de 10 líneas de maíz altamente homocigóticas y de alta capacidad de rendimiento, derivadas de poblaciones de maíces exóticos adaptados a condiciones de clima templado, para emplearlas como progenitoras de híbridos de cruza simple; y determinar a través de métodos multivariados (AMMI y SREG) la estabilidad y adaptación de dichas líneas y de sus híbridos...
Palavras-chave: Zea mays L.; Adaptación; Aptitud combinatoria; Alto rendimiento; Estabilidad; Germoplasma exótico; Adaptation; Combinatory ability; High yield; Stability; Exotic germplasm; Genética; Maestría.
Ano: 2013 URL: http://hdl.handle.net/10521/2148
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Assessment of stability of expression of various male-sterile genes in muskmelon in sub-tropical field conditions National Institute of Agronomic Research
Dhillon, N.P.S.; Kumar, J..
Five melon (Cucumis melo L.) progenies segregating for five male-sterile genes (ms-1, ms-2, ms-3, ms-4, and ms-5) along with two male-fertile cultivars were evaluated for phenotypic variation in expression of fertility in sub-tropical field conditions, for two years. Male-fertile plants of three progenies of ms-1, ms-2, and ms-3 were phenotypically unstable and produced more male-sterile flowers than plants of normal male-fertile cultivars. Progenies of ms-4 and ms-5 were stable for the expression of male-fertile plants.
Tipo: Poster Palavras-chave: Cucumis melo; Phenotype; Stability; Hybrid; Male-sterility.
Ano: 2008 URL: http://hdl.handle.net/2174/260
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Cambios en los compuestos volátiles de un concentrado de sabor limón por la presencia de ácido cítrico OceanDocs
Pino, J. A.; Sauri-Duch, E.; Cuevas-Glory, L..
En el presente trabajo se estudiaron los cambios de los componentes volátiles de un concentrado de sabor limón para preparar bebidas de limón durante 6 meses de conservación a 40 ºC. Se identificaron 44 compuestos aislados mediante microextracción en fase sólida del espacio de cabeza en combinación con la cromatografía de gases- espectrometría de masas. El limoneno, γ-terpineno, acetato de citronelilo, acetato de nerilo y acetato de geranilo, disminuyeron su contenido significativamente, mientras que el 1,4-cineol, 1,8-cineol, p-cimeno, p-cimeneno, p-menta-1,3- dien-8-ol, α-terpineol, trans-α-bergamoteno, ar-curcumeno, (E,E)-α-farneseno y β-bisaboleno la incrementaron. El neral y geranial parecen disminuir su contenido, pero estos cambios no explican todo...
Tipo: Journal Contribution Palavras-chave: Volatile compounds; Stability; Flavourings; Concentrates; Lemons; Spoilage; Citric acid.
Ano: 2008 URL: http://hdl.handle.net/1834/4893
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Clonal stability of latex yield in eleven clones of Hevea brasiliensis Muell. Arg. Genet. Mol. Biol.
Omokhafe,K.O.; Alika,J.E..
Eleven Hevea brasiliensis clones were evaluated for clonal stability of latex yield. A randomized complete block design was used with four replicates, two locations, seven years and three periods per year. Stability analysis was based on clone x year and clone x year x location interactions. Five stability parameters viz environmental variance, shukla's stability variance, regression of clonal latex yield on environmental index, variance due to regression and variance due to deviation from regression were applied. There was significant clone x environment effect at the two levels of interaction. Among the eleven clones, C 162 was outstanding for clonal stability and it can serve as donor parent for stability alleles. Three clones (C 76, C 150 and C 154)...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Hevea; Clones; Latex; Stability.
Ano: 2003 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572003000300016
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Clonal stability of tree dryness in Hevea brasiliensis Muell. Arg. Genet. Mol. Biol.
Omokhafe,K.O..
Clonal stability of tree dryness was evaluated in eleven clones of Hevea brasiliensis at the Rubber Research Institute of Nigeria. The experimental design was the randomized complete block with three replicates and ten trees per replicate. The clones were evaluated in three locations. Four stability parameters were applied. The stability parameters were: environmental variance, regression index, variance due to regression, and Shukla's stability variance. Clone C 202 was outstanding for clonal stability and could be useful for further studies and genetic improvement of tree dryness. Other four clones (C 76, C 150, C 159 and RRIM 600) were also stable.
Tipo: Info:eu-repo/semantics/article Palavras-chave: Hevea; Tree dryness; Clones; Stability.
Ano: 2004 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572004000200019
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Coalitional Matchings AgEcon
Dimitrov, Dinko; Lazarova, Emiliya A..
A coalitional matching is a two-sided matching problem in which agents on each side of the market may form coalitions such as student groups and research teams who - when matched - form universities. We assume that each researcher has preferences over the research teams he would like to work in and over the student groups he would like to teach to. Correspondingly, each student has preferences over the groups of students he wants to study with and over the teams of researchers he would like to learn from. In this setup, we examine how the existence of core stable partitions on the distinct market sides, the restriction of agents’ preferences over groups to strict orderings, and the extent to which individual preferences respect common rankings shape the...
Tipo: Working or Discussion Paper Palavras-chave: Coalitions; Common Rankings; Core; Stability; Totally Balanced Games; Two-Sided Matchings; C78; J41; D71.
Ano: 2008 URL: http://purl.umn.edu/37523
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Co-crystallization of paprika oleoresin and storage stability study Ciênc. Tecnol. Aliment.
FEDERZONI,Veronica; ALVIM,Izabela Dutra; FADINI,Ana Lúcia; SILVA,Lidiane Bataglia da; QUEIROZ,Marise Bonifácio.
Abstract Paprika oleoresin was co-crystallized to formulate a natural and hydrophilic dye for use in food applications. The color stabilities of the co-crystallized and free oleoresins were evaluated at different temperatures (25 and 35 °C, 70% RH) and light exposures (light 70 watts and dark, 25 °C, 70% RH). Co-crystallization from supersaturated sucrose syrup (S = 1.32) was found to be optimum for the formation of sugar agglomerates in a few minutes, with the paprika oleoresin entrapped inside. With time, decreases in the values ​​of the a* parameter and the β-carotene content were observed with increasing temperature and with the incidence of light. The color degradation kinetics were dependent on both factors. The loss of color was greater for the...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Co-crystallization; Paprika oleoresin; Β-carotene; Stability; Kinetics; Color.
Ano: 2019 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-20612019000500182
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Colour and stability of pure anthocyanins in aqueous solutions at high pH values IPB - Escola Superior Agrária
Andersen, Øyvind M.; Fossen, Torgils; Cabrita, Luís.
This study on anthocyanin colour variation (intensity, lambda max, molar absorbptivity) over the pH range 1-9 during 60 days of storage, was conducted on petunidin 3-[6-O-(4-O-E-p-coumaroyl-O-alfa-L-rhamnopyranosyl)-beta-D-glucopyranoside]-5-O-beta-D-glucopyranoside (petanin) and cyanidin 3-O-beta-D-glucopyranoside (cy3glc) at 10 and 23ºC. Compared to cy3glc, petanin afforded higher colour intensity and higher or similar stability throughout the whole pH range. At pH 4.0, 84% of petanin was intact after 60 days storage at 10ºC, while the corresponding solution of cy3glc was totally degraded. At pH 8.1 the colour intensity of petanin was even higher than at the lowest pH values. The visible lmax absorption of petanin after 5 days at pH 8.1 at 10ºC was...
Tipo: ConferenceObject Palavras-chave: Anthocyanins; Stability; Colour; Alkaline pH.
Ano: 1998 URL: http://hdl.handle.net/10198/3013
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Colour and stability of the six common anthocyanidin 3-glucosides IPB - Escola Superior Agrária
Cabrita, Luís; Fossen, Torgils; Andersen, Øyvind M..
This study on anthocyanin stability and colour variation (lambda max, absorptivity) in the pH range 1-12 during a period of 60 days storage at 10 and 23ºC, was conducted on the 3-glucosides of the six common anthocyanidins. It was mostly in the alkaline region that differences in colour and stability became significant. Although it has been generally accepted that anthocyanins are stable only at low pH values, this study revealed that, for some of the anthocyanin 3-glucosides (e.g. malvidin 3-glucoside), the bluish colours were rather intense and stability relatively high in the alkaline region. Thus, they can be regarded as potential colorants for some slightly alkaline food products.
Tipo: Article Palavras-chave: Anthocyanins; Colour; Stability.
Ano: 2000 URL: http://hdl.handle.net/10198/3208
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Common bean cultivars and lines interactions with environments Scientia Agricola
Carbonell,Sérgio Augusto Morais; Azevedo Filho,Joaquim Adelino de; Dias,Luiz Antônio dos Santos; Garcia,Antonio Augusto Franco; Morais,Lizz Kezzy de.
The performance of bean lines brought forth in breeding programs or of cultivars in use can be affected by environmental variability. The adaptability and stability of grain yield of 18 common bean cultivars and lines in 23 environments (combinations of seasons, years and locations) were evaluated in the State of São Paulo, Brazil. 'IAC-Carioca' and 'IAC-Carioca Eté' were used as standard cultivars for the carioca grain type, while 'FT-Nobre' and 'IAC-Una' represented the standard for black grains. The experiment was set up in a randomized complete block design with four replications and plots consisting of two, two central five meters rows flanked by border rows. Stability parameters were estimated by the methods Maximum Yield Deviations (MYD) and by the...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Phaseolus vulgaris; AMMI; Adaptability; Stability; Cultivar.
Ano: 2004 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162004000200008
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Comparison of methods for phenotypic stability analysis of cassava (Manihot esculenta Crantz) genotypes for yield and storage root dry matter content BABT
Kvitschal,Marcus Vinícius; Vidigal Filho,Pedro Soares; Scapim,Carlos Alberto; Gonçalves-Vidigal,Maria Celeste; Sagrilo,Edvaldo; Pequeno,Manoel Genildo; Rimoldi,Fabrício.
The objective of this work was to compare different phenotypic stability methods by using yield and storage root dry matter content data of eight cassava genotypes, assessed in eight environments in northwest of Paraná State, Brazil. All the methodologies applied showed to be able to study the stability of cassava genotypes, but each with its peculiarities. The methodologies of Eskridge, Annicchiarico and Lin and Binns were the most appropriated on situation with smaller effect of G x E interaction. The AMMI analysis and the Toler and Burrows methodology were the most specific on detailing specific adaptations of cassava genotypes to favorable and unfavorable environments. It could be suggested to use simultaneous AMMI analysis and Toler and Burrows...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Manihot esculenta; Correlation; Stability; Safety first indexes; Non-linear regression; AMMI analysis.
Ano: 2009 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132009000100022
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Composition and color stability of anthocyanin-based extract from purple sweet potato Ciênc. Tecnol. Aliment.
He,Xiu-li; Li,Xue-li; Lv,Yuan-ping; He,Qiang.
AbstractPurple sweet potato (PSP) can provide products with attractive color besides nutritious benefits in food processing. So, the compositions and color stability of an aqueous anthocyanin-based PSP extract were investigated in order to promote its wide use in food industry. PSP anthocyanins were extracted with water, and nine individual anthocyanins (48.72 ug mL–1 in total, 24.36 mg/100 g fresh PSP in yield) were found by HPLC analysis. The PSP extract also contained 17.11 mg mL–1 of protein, 0.44 mg mL–1 of dietary fiber, 2.82 mg mL–1 of reducing sugars, 4.02 ug mL–1 of Se, 54.21 ug mL–1 of Ca and 60.83 ug mL–1 of Mg. Changes in color and stability of the PSP extract, as affected by pH, heat, light and extraction process, were further evaluated....
Tipo: Info:eu-repo/semantics/article Palavras-chave: Purple sweet potato; Anthocyanins; Color; Stability.
Ano: 2015 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-20612015000300468
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