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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
1

Avaliação de indicadores e metodologia de coleta para estimativa da digestibilidade de nutrientes em bubalinos / Indicators and collection methodology evaluations to estimate the nutrients digestibility on Buffaloes

SOARES, Luciana Felizardo Pereira 12 February 2010 (has links)
Submitted by (edna.saturno@ufrpe.br) on 2017-04-26T15:47:39Z No. of bitstreams: 1 Luciana Felizardo Pereira Soares.pdf: 149490 bytes, checksum: 8975d1fa058398adcff4e9d0db0e75d3 (MD5) / Made available in DSpace on 2017-04-26T15:47:39Z (GMT). No. of bitstreams: 1 Luciana Felizardo Pereira Soares.pdf: 149490 bytes, checksum: 8975d1fa058398adcff4e9d0db0e75d3 (MD5) Previous issue date: 2010-02-12 / Conselho Nacional de Pesquisa e Desenvolvimento Científico e Tecnológico - CNPq / Dry fecal matter production has been estimated from neutral detergent indicators on indigestible fiber (iNDF), acid detergent fiber (iADF), indigestible dry matter (DMi), that were incubated for 144 hours and 288 hours, as well as chromium oxide (Cr2O3) and purified isolated lignin and enriched (LIPE®) in two sampling schemes (3 and 5 days) on buffaloes. Five geldings animals were used with average weight of 300 kg and feed with Cameroon grass(Pennisetum purpureum Schumacher). The experimental design was completely randomized (splitplot). The production of fecal dry matter (PFDM) was overestimated using Cr2O3, iADF 144 h, iNDF 144 h, iNDF 288 h and MSi144, while the iADF 288 h, DMi 288 h and LIPE® do not differ from the total sampling. The same result was observed for dry matter digestibility (DMD). When comparing sampling periods (3 or 5 days) no differences were found to DMS and PFDM, which demonstrate that the sampling period of 3 dayscan be used to estimate the production of dry fecal matter. The use of LIPE®, iADF and DMi as indicators (the last incubated for 288 h on rumen) are more adequate for the dry fecal matter estimation, as the digestibility determination of nutrients using a three-day fecal sampling strategy. / Foi estimada a produção de matéria seca fecal, obtida por meio dos indicadores fibra em detergente neutro indigestível (FDNi), fibra em detergente ácido indigestível (FDAi) e matéria seca indigestível (MSi), incubados in situ durante 144 horas e 288 horas, bem como por óxido de cromo (Cr2O3) e lignina isolada purificada e enriquecida (LIPE®) em dois esquemas de coleta (3 e 5 dias), em bubalinos. Foram utilizados cinco animais castrados com peso médio de 300 kg alimentados com capim elefante cv Cameroon (Pennisetum purpureum Shumacher). O delineamento experimental foi o inteiramente casualizado em parcela subdividida. A produção de matéria seca fecal (PMSF) foi superestimada quando se utilizou Cr2O3, FDAi 144 h, FDNi 144 h, FDNi 288 h e MSi144 h, enquanto que a FDAi 288 h, MSi 288 h e LIPE® não diferiram da coleta total. O mesmo resultado foi observado para a digestibilidade da matéria seca (DMS). Quando se comparou os períodos de coleta (3 ou 5 dias), não houve diferença para a PMSF e DMS, demonstrando assim que o período de coleta detrês dias pode ser utilizado para estimar a produção de matéria seca fecal em bubalinos. O emprego da LIPE®, FDAi e MSi como indicadores, os últimos incubados por 288h no rúmen, são os mais adequados para estimativa da produção de matéria seca fecal, e consequente determinação da digestibilidade dos nutrientes, usando-se três dias de coleta de fezes.
2

MINIESTAQUIA E QUALIDADE DE MUDAS DE ERVA-MATE / MINI-CUTTING AND QUALITY OF HOLLY PLANTLETS

Pimentel, Nathalia 26 February 2016 (has links)
Coordenação de Aperfeiçoamento de Pessoal de Nível Superior / The aim of this study were to evaluate the productivity of mini-stumps, the rooting capability of mini-cuttings, and the plantlet quality of holly clones. For rooting, shoots were collected from mini-stumps of four holly clones (10SM07, 06SM17, 06SM15 and 06SM12) in four times during the year. The survival percentage of mini-stumps and the number of mini-cuttings per mini-stump were evaluated. Produced shoots were cut in single-budded mini-cuttings with one leaf reduced to 50% of its original area, which were treated or not with 2000 mg L-1 of indolbutyric acid (IBA). At 30 and 60 days in humid chamber, the percentages of survival, rooting and callus formation in mini-cuttings, and the number and length of roots were evaluated. To determine the optimal time for mini-cuttings rooting, shoots were collected and cut into single-budded ones, which were treated or not with 2000 mg L-1 of IBA and evaluated as to the percentage of rooting, number and length of roots at seven-day intervals from 30 to 107 days of cultivation. To evaluate the quality of the plantlets, mini-cuttings were collected four times during the year and cultivated for 60 days in a humid chamber. Rooted mini-cuttings were transferred to rigid polyethylene tubes of 100 cm³ and polyethylene bags of 500, 1500 and 3000 cm3. At 30, 60, 90 and 120 days of cultivation in green house, the plantlets were evaluated for the percentage of survival, shoot height, stem diameter, ratio of shoot height / stem diameter and number of leaves. At 120 days of cultivation, plantlets were also evaluated for the Dickson quality index, shoot and root dry mass ratio, largest total length, surface area, total volume and number of root tips. The mini-stumps of the four holly clones had high survival, constant production of mini-cuttings by mini-stump of clones 06SM17, 06SM12 and 06SM15 during the four collection times. IBA treatment is not required for rooting mini-cuttings. Rooting of mini-cuttings varied among clones and collection times of the year. The best rooting percentage was gotten at fall and winter for all clones. The clone 06SM15 had the highest rhizogenesis capability in all collection times. The intercept between the daily current increment and the daily medium increment can be used to determine the optimal time for mini-cuttings rooting in humid chamber, which ranged from 58 to 100 days of cultivation, depending on the clone. The best shoot and root dry mass ratio, the largest total length, surface area, and total volume of roots, and Dickson quality index were observed in plantlets produced in July, without differing from those produced in October and January. The polyethylene bags, regardless of the volume (500, 1500 and 3000 cm³), allowed the production of holly plantlets with satisfactory morpho-physiological quality, for both shoot and root system. Holly plantlets can be produced by minicuttings from July to January and grown in polythene bags of 500 cm3. / Os objetivos deste trabalho foram avaliar a produtividade de minicepas, o enraizamento de miniestacas e a qualidade das mudas de clones de erva-mate. Para o enraizamento, brotos foram coletados de minicepas de quatro clones (10SM07, 06SM17, 06SM15 e 06SM12) em quatro épocas do ano. Em cada coleta foi avaliada a porcentagem de sobrevivência das minicepas e o número de miniestacas produzidas. Os brotos foram seccionados em miniestacas de gema única com uma folha reduzida em 50% da área original, as quais foram ou não tratadas com 2000 mg L-1 de ácido indolbutírico (AIB). Aos 30 e 60 dias foram avaliados as porcentagens de sobrevivência, enraizamento e calogênese, o número e comprimento das raízes das miniestacas. Para determinar o tempo ótimo de permanência das miniestacas em câmara úmida, brotos foram coletados e seccionados em miniestacas de gema única, as quais foram ou não tratadas com 2000 mg L-1 de AIB e avaliadas quanto à porcentagem de enraizamento e o número e o comprimento das raízes, em intervalo de sete dias dos 30 aos 107 dias de cultivo. Para avaliar a qualidade das mudas produzidas, miniestacas coletadas em cada época do ano, após serem cultivadas por 60 dias em câmara úmida para o enraizamento, foram transferidas para tubetes de polietileno rígido de 100 cm³ e sacos de polietileno de 500, 1500 e 3000 cm3. As avaliações ocorreram aos 30, 60, 90 e 120 dias de cultivo em casa de vegetação, avaliando-se a porcentagem de sobrevivência, a altura da parte aérea, o diâmetro de colo, a relação altura da parte aérea e diâmetro de colo e o número de folhas. Também, aos 120 dias de cultivo, foi realizada a avaliação do índice de qualidade de Dickson, relação entre a massa seca da parte aérea e das raízes, comprimento total, área superficial, volume total e número de extremidades das raízes das mudas de erva-mate produzidas por miniestaquia. As minicepas dos quatro clones de erva-mate apresentaram alta sobrevivência, além de produção constante de miniestacas por minicepa dos clones 06SM17, 06SM12 e 06SM15 durante as quatro épocas do ano. O tratamento com AIB não é necessário para o enraizamento de miniestacas de erva-mate. O enraizamento das miniestacas variou conforme o clone e a sazonalidade. As melhores porcentagens de enraizamento foram verificadas nas épocas do outono e inverno para os quatro clones avaliados. O clone 06SM15 apresentou alta capacidade rizogênica nas quatro épocas do ano. O ponto de intercepto entre as curvas de incremento corrente diário e incremento médio diário pode ser utilizado para determinar o tempo ótimo de permanência das miniestacas de erva-mate em câmara úmida, o qual variou de 58 a 100 dias, conforme o clone. A melhor relação massa seca da parte aérea e raízes, bem como o maior comprimento total, área superficial, volume total das raízes e índice de qualidade de Dickson foram observadas em mudas de miniestacas coletadas em julho, sem diferir estatisticamente das mudas produzidas em outubro e janeiro. Os sacos de polietileno, independentemente do volume (500, 1500 e 3000 cm³), permitiram a produção de mudas de erva-mate com qualidade morfo-fisiologica satisfatória, tanto da parte aérea quanto do sistema radicular. Mudas de erva-mate podem ser produzidas por miniestaquia durante, pelo menos, os meses de julho a janeiro e cultivadas em sacos de polietileno de 500 cm3.
3

Lhůty při správě daní / Time limits in tax administration

Alexa, Karel January 2013 (has links)
Time limits in tax administration Time limits have an irreplaceable role in law. They are of a crucial importance especially in situations where a certain act (exercise of a right or a fulfillment of obligation) is limited by time so that after a certain time expiration it is possible to state that such an act was not performed and thus to draw legal consequences hereof. The main purpose of a time limit is the demarcation of the state of uncertainty as to whether the act will be performed or not and thus to determine either the legal consequence of the performance of the act or the consequences of the default of time. It is clear that the tax proceedings legislation also needs its time limits. Quite frequently it is necessary to set a certain time period for the performance of an act. This time period is set by a time limit. Otherwise it would be only possible to state that an act has already been performed or not yet been performed. It would however not be possible to state that the act was supposed to be performed, i.e. if a person who could have acted or was supposed to act, in fact did not act, the whole process of administration of taxes would come to a deadlock. The aim of this thesis is, firstly, to generally analyze the concept of time limits. The legal sciences deal with the general...

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