Spelling suggestions: "subject:"supplement"" "subject:"asupplement""
151 |
Fate of Nanomaterials in the Environment: Effects of Particle Size,Capping agent and Surface Cleaning Products on the Stability of Silver Nanomaterials In Colloidal Consumer Products.Radwan, Islam Mohamed Othman 01 October 2019 (has links)
No description available.
|
152 |
Biological Treatment of Dietary Supplementary WastewaterButler, Erick Benjamin January 2009 (has links)
No description available.
|
153 |
In vitro approach of dietary and host related factors affecting digestion of animal-origin foods under cystic fibrosis diseaseAsensio Grau, Andrea 02 September 2021 (has links)
Tesis por compendio / [ES] De entre las metodologías disponibles para estudiar la digestión de alimentos, los modelos de digestión in vitro se plantean como procedimientos válidos para este propósito. La digestión in vitro consiste en simular el proceso de digestión en el laboratorio, reproduciendo las condiciones fisiológicas en cuanto a composición de los fluidos digestivos (electrolitos y enzimas), pH, temperatura, fuerzas mecánicas y duración de las etapas oral, gástrica e intestinal.
Abordar el estudio de la digestión de nutrientes es de especial relevancia en patologías que cursan con alteraciones pancreáticas o hepáticas, asociadas a una digestión de lípidos comprometida en la etapa intestinal, debido a la disminución de secreción de pancreatina, bicarbonato y sales biliares. Este es el caso de la fibrosis quística con insuficiencia pancreática, y los pacientes que padecen esta afección deben seguir la terapia de sustitución de enzimas pancreáticas, que consiste en el suministro exógeno de pancreatina encapsulada. Sin embargo, la dosis de este suplemento debe ajustarse a las características de los alimentos y no se dispone de ningún método válido para tal fin. Para hacer frente a este reto, en el proyecto financiado con fondos europeos MyCyFAPP se ha logrado desarrollar un método para ajustar la dosis óptima de los suplementos enzimáticos utilizados en la terapia. La presente tesis doctoral se realizó en el marco de dicho proyecto.
Concretamente, esta tesis tiene como objetivo abordar el estudio de la digestión de lípidos en los alimentos de origen animal (carne y productos cárnicos, huevos, queso y pescado) en el contexto de la fibrosis quística. Para abordar este objetivo se aplicó un modelo de digestión in vitro estático con el fin de explorar el papel de las características inherentes a los alimentos (estructura de la matriz alimentaria como resultado del procesado) y los factores relacionados con el individuo (pH, concentración de sales biliares y concentración de pancreatina) como factores determinantes de la lipólisis en alimentos de origen animal.
A lo largo de los cuatro capítulos presentados, centrados en el huevo, la carne, el queso y el pescado, se presenta un diseño experimental común para estudiar la lipólisis, la proteólisis y la degradación de la matriz. En cada estudio, las diferentes técnicas de procesado aplicadas a los alimentos evaluados también permitieron evaluar el efecto de las propiedades inherentes a los alimentos en los resultados del estudio. Los resultados han contribuido al desarrollo de un nuevo método basado en la evidencia para optimizar la terapia de reemplazo de enzimas pancreáticas e informan a la comunidad científica sobre nuevos conocimientos en el comportamiento de diferentes alimentos sometidos al proceso de digestión. / [CA] De les metodologies disponibles per estudiar la digestió d'aliments, els models de digestió in vitro es plantegen com a procediments vàlids per a aquest propòsit. La digestió in vitro consisteix en simular el procés de digestió al laboratori, reproduint les condicions fisiològiques pel que fa a la composició dels fluids digestius (electròlits i enzims), pH, temperatura, forces mecàniques i durada de les etapes oral, gàstrica i intestinal. Abordar l'estudi de la digestió de nutrients és d'especial rellevància en patologies que cursen amb alteracions pancreàtiques o hepàtiques, associades a una digestió de lípids compromesa en l'etapa intestinal, a causa de la disminució de secreció de pancreatina, bicarbonat i sals biliars. Aquest és el cas de la fibrosi quística amb insuficiència pancreàtica. Els pacients que pateixen aquesta afecció han de seguir la teràpia de substitució d'enzims pancreàtics, que consisteix en el subministrament exogen de pancreatina encapsulada. No obstant això, la dosi d'aquest suplement ha d'ajustar-se a les característiques dels aliments i actualment no es disposa de cap mètode vàlid per a tal fi. Per enfrontar a aquest repte, en el projecte finançat amb fons europeus, MyCyFAPP, s'ha aconseguit desenvolupar un mètode per a ajustar la dosi òptima dels suplements enzimàtics utilitzats en la teràpia. La present tesi doctoral es va realitzar en el marc d'aquest projecte.
Concretament, aquesta tesi té com a objectiu abordar l'estudi de la digestió de lípids en els aliments d'origen animal (ous, carn i productes carnis, formatge i peix) en el context de la fibrosi quística. Per a abordar aquest objectiu es va aplicar un model de digestió in vitro estàtic amb la finalitat d'explorar el paper de les característiques inherents als aliments (estructura de la matriu alimentària com a resultat del processament) i els factors relacionats amb l'individu (pH, concentració de sals biliars i concentració de pancreatina) com a factors determinants de la lipòlisi en aliments d'origen animal.
Als quatre capítols presentats, centrats en l'ou, carn, formatge i peix, es presenta un disseny experimental comú per a estudiar la lipòlisi, la proteòlisi i la degradació de la matriu. En cada estudi, les diferents tècniques de processament aplicades als aliments avaluats també van permetre avaluar l'efecte de les propietats inherents als aliments en els resultats de l'estudi. Els resultats han contribuït al desenvolupament d'un nou mètode basat en l'evidència per a optimitzar la teràpia de substitució d'enzims pancreàtics i informen la comunitat científica sobre nous coneixements en el comportament de diferents aliments sotmesos al procés de digestió. / [EN] Among the available methodologies to study food digestion, in vitro digestion models have raised as a valid procedure. In vitro digestion consists of simulating the digestion process in the laboratory, by reproducing the physiological conditions in terms of digestive fluids composition (electrolytes and enzymes), pH, temperature, mechanical forces and duration of the oral, gastric and intestinal stages.
Addressing the study of nutrient digestion is of special relevance in pathologies coursing with pancreatic or hepatic alterations, which are associated with compromised intestinal lipid digestion due to reduced secretion of pancreatin, bicarbonate and bile salts. This is the case of Cystic Fibrosis along with pancreatic insufficiency, and the patients suffering this condition have to follow pancreatic enzyme replacement therapy, the exogenous supply of encapsulated pancreatin. However, the dose of this supplement should be adjusted to the specific characteristics of foods, and no valid method was available for such purpose. To tackle this challenge, the EU-funded project MyCyFAPP succeed to develop a method to adjust the optimal dose the enzyme supplements used in the therapy. The present doctoral thesis was conducted as a relevant part of this project.
Concretely, this thesis aims at addressing the study of lipid digestion in foods to generate new knowledge regarding nutrient digestion in animal origin dietary sources (egg, meat and meat products, cheese and fish) in the context of Cystic Fibrosis. To address this goal a static in vitro digestion model was applied. The role of inherent-to-food characteristics (resulting food matrix structure from processing) and host related factors (pH and bile salts concentration and pancreatin concentration) were explored as determinants of lipolysis in animal-origin foods.
Along the four chapters presented, focused on egg, meat, cheese and fish, a common experimental design was applied to study lipolysis, proteolysis and matrix degradation. In each study, different processing techniques applied to the assessed foods allowed for evaluating the effect of inherent-to-food properties on the study outcomes as well. The results have contributed to the development of a new evidence-based method to optimise pancreatic enzyme replacement therapy, and inform the scientific community about new insights on the behaviour of different foods undertaking the digestion process. / Authors of this paper acknowledge the European Union and the Horizon 2020
Research and Innovation Framework Programme (PHC-26-2014 call Self-management
of health and disease: citizen engagement and mHealth) for fully funding this research
in the context of MyCyFAPP Project, under grant agreement number 643806.
The authors would like to thank the Conselleria de Educació i Investigació de la
Generalitat Valenciana and also the European Union (“El Fondo Social Europeo (FSE)
invierte en tu futuro”) for the PhD scholarship given to Andrea Asensio Grau
(ACIF/2017/008). This study was developed thanks to the equipment funded with the
support from the Generalitat Valenciana IDIFEDER/2018/041 (PO FEDER Comunitat
Valenciana 2014-2020). Finally, we thank
Antonio Martínez Cañada, from the Data Science and Biostatistics Unit of Instituto de
Investigación Sanitaria La Fe, and Arash Javanidejad for the English corrections. / Asensio Grau, A. (2021). In vitro approach of dietary and host related factors affecting digestion of animal-origin foods under cystic fibrosis disease [Tesis doctoral]. Universitat Politècnica de València. https://doi.org/10.4995/Thesis/10251/171512 / Compendio
|
154 |
迂迴,延宕與延異:《明信片》的書信特質 / Detour, Deferral, and Différance: Epistolarity in The Post Card黃惠瑜, Huang , Hui-yu Unknown Date (has links)
在德希達的《明信片:從蘇格拉底到佛洛伊徳之外》(1987)一書中,〈郵寄〉這個文本由許多交換傳遞的明信片所組成。這些收錄於同一文本中的明信片令我們聯想到書信小說中編纂成冊的信件。許多十七、十八世紀的英國與法國書信經典名著構成了書信文類的主要架構,如吉樂哈格的《葡萄牙修女的情書》(1669)、理查生的《潘蜜拉》(1740)與《克萊麗莎》(1747-1748)、葛芬妮的《祕魯公主的情書》(1747)、盧梭的《茱莉,或新伊珞絲》(1761)以及德拉克勞斯的《危險關係》(1782)。面對這些書信文類的前導者,且處於二十世紀傳統書信寫作式微的時代中,是什麼因素促使德希達創作〈郵寄〉這部書信文本呢?〈郵寄〉的書信文本又與傳統書信小說有何不同呢?
關於這個議題,我所提出的論點是,德希達的〈郵寄〉企圖解構書信文類。〈郵寄〉一方面強化了書信文類特有的書信特質,另一方面又以明信片的郵件傳遞效果取代替換傳統書信小說的書信文類特質。明信片的郵件傳遞效果主要呈現出「傳送終點」與「預期的收信者」這兩種特定規範的不可能性。明信片總是暗示信件傳送過程中「被攔截」與「多元收信者」的可能性。這樣的特質使明信片得以打破囿於最初起點與最後終點做為邊界的直線軌道。如此的突破有助於德希達解構西方知識體系的架構。明信片的郵件傳遞效果動搖了源自蘇格拉底的知識遺產直線傳承,顯示出知識遺產是經由多元讀者所傳遞的,且容許眾多不同的詮釋方法參與其中。多樣性的想法損毀了「原作與衍生」,「在場與缺席」以及「公開與隱私」之間的二元對立邏輯。明信片「半私密,半公開」(《明信片》62)的形式在多樣化所隱含的不確定性之間來回擺盪,游移不定。這種不確定性正是德希達藉由〈郵寄〉這個文本所要強調的。因此,即使身處電信通訊網絡遍佈的時代,德希達依然期望引發「不受拘束的明信片化帝國」(《明信片》104)的可能性。明信片化的意義並非加速書信寫作的「衰微」(《明信片》104),而是希望能夠不斷地散佈差異產生的可能性。
在本論文中,我從迂迴、延宕與延異這三項特性來闡述明信片的書信特質。這三項特性同時交織於我對〈郵寄〉這個書信文本的討論中。在第一章〈書信文類:強化與替代〉裡,我提出了〈郵寄〉所呈現的似非而是的矛盾,既強化又替代書信文類的特質。書信文類因此被置於差異的迂迴內,而延遲了其文類身份認同的最後裁定。在第二章〈書信他/她者:欲望投射〉裡,我援引拉岡「小寫他/她者」的概念來闡釋書信寫作行為中的自我建構過程。由於寄信者需要缺席收信者的存在以召喚差異的產生,因此寄信者的自我認同總是不斷地在迂迴的信件傳遞空間中被延宕。第三章〈書信寫作:添補的矛盾〉裡,我將德希達對「添補」的概念與書信寫作中添加與替代的效果作了連結。書信寫作彌補了距離造成的溝通差距,同時也以距離替代了最後與缺席收信者真實相遇的那一刻。第四章〈書信交換:Fort Da消失與返轉的遊戲〉中,我比較了佛洛伊德、拉岡與德希達對於fort da遊戲不同的觀察角度。在書信交換的過程裡,當多元讀者的可能性被納入考量時,書信的傳送與接收便會持續地滯留迂迴於讀者的多元閱讀與詮釋,而延遲了到達預定目的地的時間。在第五章〈書信傳承:知識遺產的明信片〉裡,我探討了德希達對於〈郵寄〉中明信片上蘇格拉底與柏拉圖位置返轉圖所做的種種推敲。這些推測暗示了脫離知識體系直線傳承,迂迴而行的可能性。為了再現知識的意涵而創造出的多元詮釋角度會不斷地延宕知識傳承的最終意義。 / In Jacques Derrida’s The Post Card: From Socrates to Freud and Beyond (1987), the part of “Envois” is composed of many exchanged post cards. This collection of post cards reminds us of the letters compiled in epistolary novels. There is a lot of prestige attached to many seventeenth- and eighteenth-century English and French epistolary novels, such as Gabriel de Guilleragues’ The Portuguese Letters (1669), Samuel Richardson’s Pamela (1740) and Clarissa (1747-1748), Françoise de Graffigny’s Letters from a Peruvian Woman (1747), Jean-Jacques Rousseau’s Julie, ou la nouvelle Héloïse (1761), and Choderlos de Laclos’ Les Liaisons dangereuses (1782). These epistolary novels constitute the main frame of the epistolary genre. Then, confronted with the epistolary predecessors, what prompts Derrida to write the epistolary text of “Envois” in the twentieth century, in which the telecommunications networks appear to overpower the importance of writing letters or post cards? What is the difference between “Envois” and the previous epistolary novels?
On this issue, I want to argue in my thesis that Derrida’s “Envois” is intended to deconstruct the epistolary genre by paradoxically valorizing and substituting the postal effects of the post card for the generic identities of epistolary novels. The postal effects of the post card primarily invoke the impossibility of the predestined destination and intended receiver. The post card always implies the possibilities of interception and multiple receivers in the process of transmission. In this way, the post card disrupts the linear path confined in the hierarchical opposites between the original departure point and the final destination. This disruption facilitates Derrida’s attempt to deconstruct the construction of knowledge in the Western intellectual genealogy. The postal effects are applied to destabilize the linear succession of intellectual inheritance originated since Socrates. The inheritance is transmitted by multiple readers and hence susceptible to a myriad of interpretations. The binary logic between the original and the derivative, the present and the absent, and the public and the private is undermined in the multiplicity. The form of the post card, which is “half-private half public” (Post Card 62), oscillates in the indeterminacy of multiplicity. The postal effects of indeterminacy aroused in the post card are what Derrida emphasizes in “Envois.” As a result, even in the age replete with the telecommunications networks, Derrida still proposes the possibility of “the unlimited empire of a postcardization” (104). The postcardization does not mean to precipitate the “decadence” (104) of epistolary writing, but it aims to disseminate and recurrently stimulate the possibility of difference.
In my thesis, I propose three perspectives to illuminate the epistolarity of the post card: detour, deferral, and différance. They are interwoven in my discussion of Derrida’s “Envois.” In chapter one “Epistolary Genre: Valorization and Substitution,” I propound a paradox that “Envois” simultaneously valorizes and substitutes for the epistolary genre. “Envois” therefore puts the epistolary genre in a detour of difference and defers its determination of identity. In chapter two “Epistolary Otherness: The Object of Desire,” I apply Jacques Lacan’s concept of the object of desire to elucidate the self-construction in the act of writing post cards. The sender’s self-identity is continually deferred in a detour, because s/he requires the absent receiver to evoke his/her difference. In chapter three “Epistolary Writing: Paradox of the Supplement,” I relate Derrida’s concept of the supplement to the paradoxical effects of addition and substitution in epistolary writing. Writing post cards adds to a compensation of the distance, but it also simultaneously substitutes the distance for the final encounter with the absent receiver. In chapter four “Epistolary Exchange: Play of the Fort Da,” I compare Sigmund Freud’s, Lacan’s, and Derrida’s different observations on the fort da game. The fort da movements of epistolary exchanges are interminably deferred in a detour, when multiple readers in the process of transmission are taken into consideration. The multiple readers replenish possibilities of differences with a variety of interpretations. In chapter five “Epistolary Inheritance: Post Card of Intellectual Legacy,” I explore Derrida’s speculations on the scene of reversal copied on the post cards collected in “Envois.” The scene of reversal between Socrates and Plato is speculated to imply possible detours away from the linear succession of genealogy. Different representations of knowledge persistently defer the final determinate meaning of the intellectual inheritance.
|
155 |
Évaluation de suppléments alimentaires pour deux espèces d’acariens prédateurs, Amblyseius swirskii et Neoseiulus cucumeris (Acari: Phytoseiidae) pour l’optimisation du contrôle biologique du thrips des petits fruits (Frankliniella occidentalis) en serricultureFaucher Delisle, Julie 01 1900 (has links)
Projet réalisé en cotutelle avec Jacques Brodeur et Les Shipp / Ce projet de recherche a examiné le supplément alimentaire comme technique pour accroître l'efficacité de deux espèces d’acariens prédateurs, Neoseiulus cucumeris et Amblyseius swirskii contre le thrips des petits fruits Frankliniella occidentalis. Des tests en laboratoire ont vérifié l’adéquation de trois espèces de pollen – de quenouille, de maïs et de pomme – ainsi que des œufs de la pyrale Méditerranéenne de la farine pour les acariens prédateurs à l'étude. En termes de valeur rm, les œufs de pyrale et les pollens de quenouille et de pomme étaient de qualité égale pour A. swirskii, tandis que le pollen de pomme s’est distingué pour N. cucumeris. Lorsque nourris d’oeufs de la pyrale, les deux espèces ont complété leur développement avec des valeurs de rm élevées. Le pollen de pomme est apparu comme étant un supplément alimentaire accessible et adéquat pour les deux prédateurs. À court terme (période de 24h), l’influence du pollen de pomme sur les interactions trophiques (larves de F. occidentalis comme proie) et intraguildes (entre les espèces de prédateurs) sur chrysanthèmes standardisés a été examinée. La présence de pollen a considérablement réduit la prédation de N. cucumeris sur les thrips ainsi que la prédation intraguilde pour les deux prédateurs. L'impact du pollen de pomme sur les populations de thrips et sur la rétention des prédateurs dans une culture de chrysanthèmes a été évalué sur une période de 4 semaines. L'introduction de A. swirskii avec pollen a permis le meilleur contrôle des populations de thrips tandis que N. cucumeris ne s’est pas établi dans la culture lorsqu'il a été introduit seul. Le pollen de pomme a amélioré la lutte au thrips par A. swirskii dans une culture de chrysanthème via une réponse numérique de la proie et la rétention des prédateurs dans la culture. Le plus bas taux de dommages importants a été observé lorsque les deux acariens prédateurs étaient utilisés de concert. / This research investigated supplemental food source as a technique to increase the efficiency of two species of predatory mites, Neoseiulus cucumeris and Amblyseius swirskii against the western flower thrips Frankliniella occidentalis. Laboratory assays aimed to assess the suitability of three pollen species – cattail, maize and apple – and eggs of the Mediterranean flour moth as supplemental food source for the predatory mites under study. In terms of rm value, flour moth eggs, cattail pollen and apple pollen were food sources of equal quality for A. swirskii, while apple pollen appeared to stand out for to N. cucumeris. Maize pollen was a less suitable food source for both species. When fed flour moth eggs, A. swirskii and N.cucumeris completed development and showed high rm values. Apple pollen appeared to be an accessible and suitable food source for both predators. Short term (24h period) influence of apple pollen availability on trophic (F. occidentalis larvae as prey) and intraguild (between the predator species) interactions on standardized chrysanthemum was examined. It significantly lowered predation on thrips by N. cucumeris and led to a decrease in intraguild predation for both predators. Following this, the impact of apple pollen on thrips populations and predator’s maintenance on chrysanthemum greenhouse crop was assessed over a 4 weeks period. The introduction of A. swirskii with pollen provided the best control on thrips while N. cucumeris did not remain on the crop when introduced alone. Apple pollen improved thrips control by A. swirskii in chrysanthemum crops through prey numerical response and retention of predators on plants. The lowest rate of heavy dammages were observed when both predators were used together.
|
156 |
Processamento de grãos de milho flint e sua substituição por polpa cítrica em dietas para tourinhos Nelore terminados em confinamento / Flint corn grain processing and increasing levels of citrus pulp in finishing diets for Nellore bulls.Gouvêa, Vinícius Nunes de 18 June 2012 (has links)
O objetivo do presente estudo foi avaliar os efeitos de métodos de processamentos de grãos de milho flint (floculação (MF), 310 g/L x moagem (MM), 1,3 mm de tamanho médio de partícula - TMP) e sua substituição parcial por polpa cítrica peletizada (0, 25, 50 e 75% da MS da dieta) no desempenho e nas características da carcaça de tourinhos terminados em confinamento. Foram utilizados 216 tourinhos da raça Nelore, com peso inicial de 350 kg, alojados em 40 baias coletivas, distribuídos um delineamento em blocos casualizados em arranjo fatorial 2 x 4, perfazendo um total de oito tratamentos (MM0, MM25, MM50, MM75, MF0, MF25, MF50, MF75). O experimento teve duração de 103 dias, após a adaptação dos animais às dietas experimentais, que apresentaram na composição da MS, 12% de bagaço de cana de açúcar in natura (BIN) e 88% de concentrado. Os dados foram analisados através do procedimento MIXED do pacote estatístico SAS, sendo a baia considerada a unidade experimental. Houve interação significativa (P<0,05) para as variáveis IMS, PF, GPD e GPD/IMS entre os tipos de processamento de milho e sua substituição por polpa cítrica na dieta. A substituição do milho floculado por polpa cítrica não afetou (P>0,05) a IMS dos animais, entretanto, houve efeito positivo (P<0,05) da polpa cítrica na IMS dos animais alimentados com milho moído quando a polpa substituiu 50% desse milho (MM50) em comparação com os tratamentos MM0 e MM75. A inclusão de polpa cítrica diminuiu o GPD dos animais nas dietas contendo milho floculado (1,80; 1,52; 1,70; 1,58 kg.cab-1), e aumentou o GPD nas dietas contendo milho moído (1,60; 1,74; 1,85; 1,70 kg.cab-1). A maior eficiência alimentar foi observada nos animais alimentados exclusivamente com milho floculado, seguido pelos animais alimentados com a dieta MF50. Inclusão de polpa cítrica diminuiu a eficiencia alimentar dos animais alimentados com milho floculado (0,222; 0,190; 0,200; 0,184) e não teve nenhum efeito para os animais recebendo dietas contendo milho moído (0,180; 0,176; 0,180; 0,186). A Elg foi maior para as dietas contendo milho floculado (1,73; 1,51; 1,56; 1,45 e 1,42 Mcal kg.MS-1) em comparação com as dietas contendo milho moído (1,42; 1,37; 1,39; 1,44 Mcal kg.MS-1), com um efeito negativo da polpa cítrica nas dietas contendo milho floculado. A espessura de gordura foi maior nos animais alimentados com milho moído em comparação aos animais alimentados com milho floculado (4,4 mm x 5,0 mm). Quando a polpa cítrica substituiu até 50% do milho nas dietas, o teor de amido fecal foi menor para as dietas contendo milho floculado em comparação as dietas contendo milho moído (2,0% x 9,3%). Em conclusão, a floculação aumenta a Elg para bovinos Nelore alimentados com dietas ricas em concentrado, em comparação à moagem fina. A polpa cítrica diminui a Elg nas dietas contendo milho floculado e não apresenta efeitos negativos sobre as dietas contendo milho moído para bovinos da raça Nelore terminados em confinamento. / The effects of flint corn processing (steam flaking, 310 g/l vs. gridding, 1.3 mm GMD) and the partial replacement of corn with citrus pulp (0, 25, 50 or 75%) in feedlot diets were evaluated. A total of 216 Nellore bulls (IBW 350 kg) were allotted to 40 pens and used in a randomized complete block design with a 2 × 4 factorial arrangement of treatments (SF100:CP0; SF75:CP25; SF50:CP50; SF25:CP75; GC100:CP0; GC75:CP25; GC50:CP50; GC25:CP75) for 103-d. The diets contained (% DM) 12% sugar cane bagasse and 88% concentrate. Data was analyzed using mixed procedure of SAS with pens as experimental units. For DMI, ADG, G/F and observed NEg the effects of grain processing, the effects of citrus pulp inclusion in the diets and interactions were significant (P < 0.01). All the diets containing SFC presented less DMI than the GC75:CP25 and the GC50:CP50 diets. Citrus pulp had no effect on DMI of the SFC diets, however it increased DMI when it replaced up to 50% of the GC. Inclusion of CP decreased ADG in the SFC diets (1.80; 1.52; 1.70; 1.58 kg.head-1 and it increased ADG in the GC diets (1.60; 1.74; 1.85; 1.70 kg.head- 1. The greatest G/F was observed for Nellore cattle fed the SF100:CP0 diet followed by the SF50:CP50 diet. Inclusion of citrus pulp decreased G/F of cattle fed SFC (0.222; 0.190; 0.200; 0.184) and had no effect for cattle fed GC diets (0.180; 0.176; 0.180; 0.186). Diet NEg was greater for SFC diets (1.73; 1.51; 1.56; 1.45 Mcal kg.DM-1 than for GC diets (1.42; 1.37; 1.39; 1.44 Mcal kg.DM-1, with a negative effect of CP in the SFC diets. Fat thickness was greater for GC than for SFC diets (4.4 mm vs. 5.0 mm). When CP replaced up to 50% of corn in the diets fecal starch was less for SFC diets than for GC diets (2.0% vs. 9.3%). In conclusion, SFC increases diet NEg for Nellore cattle fed high concentrate diets compared to ground corn. Citrus pulp decreases NEg in SFC diets and has no negative effects on ground corn diets NEg for Nellore cattle.
|
157 |
Nutrição pós-eclosão de frangos de corte / Post-hatch nutrition of broiler chickensGomes, Gilson Alexandre 15 March 2007 (has links)
Realizaram-se dois experimentos com o objetivo de avaliar os efeitos da nutrição pós-eclosão em frangos de corte. No primeiro experimento avaliaram-se o efeito do tempo de fornecimento da dieta pré-inicial (DPI) nas características histomorfométricas do duodeno (CHD), em parâmetros de desempenho (PDES), de rendimento de carcaça (RC) até os 49 dias de idade. Foram utilizadas 960 aves distribuídas em delineamento inteiramente casualizado em esquema fatorial 2x4 (2 pesos de pintainhos - até 42 gramas e acima de 45 gramas; 4 tempos de fornecimento da DPI - 0, 1 a 7 dias, 1 a 10 dias e 1 a 14 dias), totalizando 8 tratamentos com 5 repetições de 30 aves cada. No segundo experimento avaliaram-se o tempo para alojamento e o fornecimento de suplementos pós-eclosão (SPO) para pintainhos com diferentes pesos à eclosão, na atividade mitótica de células satélites da musculatura peitoral, na alometria dos órgãos do trato gastrintestinal (TGI), em CHD, em PDES, e RC até os 42 dias de idade. Foram utilizadas 1.280 aves distribuídas em delineamento inteiramente casualizado em esquema fatorial 2x2x2 (2 pesos dos pintainhos à eclosão: até 44g e acima de 48g; 2 SPO: 1 suplemento com 8% PB e 16% carboidratos - SPO 8/16 - e 1 suplemento com 10% PB e 20% de carboidratos - SPO 10/20 - ; 2 períodos de fornecimento dos SPO: 24 e 48h), totalizando 8 tratamentos com 4 repetições de 40 aves cada. Adicionalmente, foram alojadas 160 aves da mesma linhagem, que apresentavam peso médio de 49g à eclosão, e foram submetidas a um período de jejum de 24h, sendo que as mesmas provinham do mesmo lote de matrizes das aves submetidas aos tratamentos supracitados. Os animais de ambos os experimentos foram submetidas a programas alimentares que compreenderam três ou quatro fases (préinicial e/ou inicial; engorda; final), sendo as dietas formuladas a base de milho e farelo de soja. Os dados obtidos foram analisados com auxílio do procedimento GLM do software estatístico SAS, e as médias comparadas pelo teste de Tukey ao nível de 5% de probabilidade. Para o presente estudo, o peso dos pintainhos ao alojamento/eclosão causou efeito significativo no desempenho dos animais, sendo que animais mais pesados apresentaram peso vivo superior, apesar de terem apresentado menores alturas de vilosidade. Observou-se que o fornecimento da DPI por um período de 7 dias, causou efeito benéfico no desempenho dos animais, acarretando, entretanto, numa diminuição no RC das aves. Pintainhos mantidos em jejum por um período de 24h demonstraram um melhor desenvolvimento do TGI no período pós-eclosão, permitindo que estas aves apresentassem crescimento compensatório. O fornecimento de SPO demonstrou ser eficaz em reduzir a perda de peso dos animais no período pré-alojamento, sendo que o oferecimento do SPO 10/20 mostrou ser mais vantajoso, devido ao fato do mesmo ter causado efeitos benéficos nas CHD, e também um aumento no rendimento de filé de peito. Entretanto, deve-se priorizar o fornecimento dos SPO pelo menor período possível, já que os mesmos não são capazes de suprir de maneira adequada às exigências nutricionais das aves recém-eclodidas. / It were performed two experiments with the aim of evaluate the effects of posthatch nutrition of broiler chickens. In the first trial were evaluated the effects of feeding a pre-starter diet (PSD) on duodenal morphology (DM), live performance (LP), and carcass yield (CY). Nine hundred and sixty day-old male Cobb-500 broiler, with two different weights at housing (until 42 g and more than 45 g) were placed in 32 floor pens, and then submitted to four different periods of feeding a PSD (0, 1 to 7 days, 1 to 10 days and 1 to 14 days), totalizing 8 treatments with 4 replications of 30 birds each. In the second trial were evaluated the effects of feeding different hatchling supplements (HS) for different periods on breast muscle satellite cell mitotic activity (SCMA), alometric growth of digestive organs, DM, LP, and CY of broiler chickens up to 42 days. One thousand and two hundred and eighty day-old male Cobb-500 broiler were used on a 2x2x2 factorial study (two different weights at hatch :until 44 g and more than 49 g; two HS: 8% of crude protein and 16% of carbohydrates - HS 8/16 - or 10% of crude protein and 20% of carbohydrates - HS 10/20; two feeding periods of HS: 24 or 48h), totalizing 8 treatments with 4 replications of 40 birds each. Additionally, it were housed 160 male chicks from the same broiler breeder flock, of 49g of mean weight at hatch, which were submitted to 24h fasting prior to placement. The animals of both experiments were fed with basal corn-soy pre-starter/starter/grower/finisher diets. All data were analyzed using SAS\'s GLM procedures, and significance were measured at p<0,05 using Tukey\'s multiple range test to determine differences between treatments means. Overall, heavier birds at hatch/housing caused significative effect on LP, presenting decreased villus height, and an increased body weight. The birds that were fed with the PSD up to 7 days presented an increased LP, and a smaller CY. Chicks which were fasted for 24h presented a better development of DM on the post-hatch period, showing a compensatory growth. Both HS were efficient on minimize the chick\'s weight loss prior to placement, however birds that were fed with 10/20 HS showed satisfactory effects not only on DM but also an increased breast meat yield. However, the period of feeding of HS should be as small as possible, because this supplement is not capable to supply efficiently the nutritional requirements of newly hatched chicks.
|
158 |
A atividade artesanal com fibra de bananeira em Comunidades Quilombolas do Vale do Ribeira (SP). / Activities in handcraft from banana plant fibre in Quilombola communities in The Ribeira Valley (São Paulo State).Santos, Katia Maria Pacheco dos 19 May 2005 (has links)
O presente estudo trata da descrição e análise da atividade artesanal com fibra de bananeira praticada pelas comunidades quilombolas de Ivaporunduva, André Lopes e Sapatu, município de Eldorado, região do Vale do Ribeira, tendo como referencial teórico o conceito de ecodesenvolvimento proposto por Sachs (1980). A atividade artesanal com fibra de bananeira foi iniciada no ano de 1997, através de um projeto de pesquisa executado pela Escola Superior de Agricultura "Luiz de Queiroz" (ESALQ) - Universidade São Paulo (USP): "Projeto de Aproveitamento de Resíduos da Agroindústria da Banana no Vale do Ribeira, SP" cujo objetivo consistia em realizar estudos que resultassem em alternativas economicamente viáveis para o aproveitamento dos resíduos da bananicultura na região. Desde de então, a atividade artesanal com fibra de bananeira vêm sendo praticada por integrantes das comunidades referidas. Para coletas de dados foram utilizadas técnicas comumente trabalhadas pelas nas ciências sociais como: observação participante, entrevistas informais não-estruturadas e semi-estruturadas com os artesãos envolvidos e com representantes de Instituições governamentais e não governamentais atuantes no processo. Verificou-se neste trabalho a contribuição da atividade artesanal na valorização da mulher, a compatibilidade da tecnologia repassada com os contextos social e ambiental locais, o aproveitamento dos recursos locais disponíveis e o papel dessa atividade na economia familiar. Analisando o processo de geração, adoção e disseminação da atividade artesanal com fibra de bananeira e seus resultados nas comunidades conclui-se que esta atividade: (1) representa hoje um significativo complemento na renda familiar dos artesãos que a praticam; (2) é praticada em conformidade com a organização sócio-cultural local, (3) não gera impacto ambiental negativo e (4) dispõe, em quantidade significativa, da matéria prima necessária para realização da atividade. Portanto, sua prática é compatível com os preceitos do ecodensenvolvimento. / This study focuses on a description and analysis of activities in handcraft from banana plant fibre in practice among Quilombola communities in Ivaporunduva, André Lopes, and Sapatu, municipality of Eldorado, in the region of the Ribeira Valley, with the concept of ecodevelopment proposed by Sachs (1980) as theoretical reference. Activities in handcraft from banana plant fibre began in 1997 through a research project carried out by the Escola Superior de Agricultura "Luiz de Queiroz" (ESALQ) - USP - the University of São Paulo: "Project for Use of Agroindustrial Residue from Banana in the Ribeira Valley, SP", the objective of which consisted in carrying out studies that would result in economically viable alternatives for the use of the residues of banana crops in the region. Activities in handcraft have been in practice by members of these same communities as from then. Data were collected by means of techniques in common use in social sciences such as: participant observation, non-structured and semi-structured informal interviews with the craftsmen involved and with representatives of government and non-government institutions active in the process. The study records the contribution of handcraft activities in enhancing the role played by women, in technological compatibility conveyed within local social and environmental contexts, in the use of local resources available, and in the role of these activities in terms of family economy. As a result of analyzing the process of generating, adopting, and disseminating handcraft activities from banana plant fibre and the results in the communities, it can be concluded that these same handcraft activities: (1) today, account for a significant supplement to the family income for the craftsmen who engage in handcraft; (2) are in practice in accordance with local socio-cultural organization; (3) do not generate a negative impact on the environment and (4) have resort to a significant quantity of the raw material necessary to carry out these same activities. This handcraft activity is, therefore, compatible with the precepts of ecodevelopment.
|
159 |
Consumo de monensina sódica via suplemento mineral por bovinos de corte em pastagens / Monensin intake via mineral supplement by beef cattle under grasslandsFranco, Fernando Masello Junqueira 18 January 2008 (has links)
Quatrocentos e trinta bovinos de corte em crescimento (peso vivo inicial médio de 250 kg) foram alocados de acordo com o sexo e raça em 3 blocos completos, contendo 3 tratamentos, num total de 9 parcelas experimentais. Semanalmente avaliou-se o consumo de um suplemento mineral controle (TC = Nutron PROBEEF 60), e dois suplementos medicados com monensina sódica (TR = Nutron PROBEEF 60 + 1500 ppm de monensina sódica na forma de Rumensin 200 e TM = Nutron PROBEEF 60 + 1500 ppm de monensina sódica em veículo especial da ELANCO SAÙDE ANIMAL). Os animais foram mantidos em pastagem de gramíneas tropicais, sob lotação contínua. O consumo de suplemento também foi estimado individualmente em cada animal por 4 ocasiões a intervalos de 28 dias, utilizando-se lítio como marcador sanguíneo. A adição de monensina sódica ou Rumensin reduziu o consumo médio de suplemento pelo rebanho (TC=56,9g/cab/dia, TR=27,5g/cab/dia, TM=36,1g/cab/dia, P<0,05). Os tratamentos aditivados com monensina apresentaram menor consumo médio (P<0,01), menor quantidade consumida por visita ao cocho (P<0,01), menor freqüência de visitas (P<0,01) e menor probabilidade de consumo do suplemento (P<0,01). / A four hundred thirty growing beef cattle (250 kg initial live weight) were allocated by gender and breed in three complete blocks, comprising three treatments, in a total of nine plots. Weekly there were made intake evaluations of the control plot with mineral supplement (TC = Nutron PROBEEF 60), and of the two with monensin supplements added (TR = Nutron PROBEEF 60 + 1500 ppm monensin sodium as Rumensin 200 and TM = Nutron PROBEEF 60 + 1500 ppm monensin sodium in a special medium made by ELANCO ANIMAL HEALTH). The animals were maintained in tropical grasslands under continuous stocking. The individual intake was estimated in four occasions with a twenty eight days interval, using lithium as blood marker. The addition of monensin sodium or Rumensin reduced the mean intake of supplement by the herd. (TC=56,9g/head/day, TR=27,5g/head/day, TM=36,1g/head/day, P<0,05). The treatments with added monensin showed reduced mean intake (P<0,01), reduced amount consumed per trough visit (P<0,01) reduced visit frequency (P<0,01) and reduced the probability of intake (P<0,01).
|
160 |
Níveis de suplemento energético para bovinos em pastagens tropicais e seus efeitos no consumo de forragem e fermentação ruminal / Effects of levels of energetic supplement for beef cattle grazing tropical pastures on forage intake and ruminal fermentationDórea, João Ricardo Rebouças 19 January 2011 (has links)
O estudo teve como objetivo avaliar os efeitos de diferentes níveis de suplementação energética sobre os parâmetros metabólicos (ruminais e sanguíneos), consumo de forragem, comportamento animal e cinética de fermentação ruminal de novilhos Nelore recriados em pastagem tropical na época das águas. Os tratamentos foram: T1) controle (somente suplementação mineral); T2) 0,3% PC; T3) 0,6% PC; e T4) 0,9% PC em milho moído fino e monensina sódica. Foram utilizados 8 novilhos Nelore, fistulados no rúmen, com aproximadamente 410 kg e 48 meses de idade. O delineamento estatístico utilizado foi o de quadrado latino, com 2 quadrados latinos 4x4. Os animais foram alocados em 1 ha de pastagem de capim Brachiaria brizantha cv. Marandu. Os parâmetros avaliados foram o consumo de forragem, comportamento animal, pH e amônia ruminais, concentrações de ácidos graxos de cadeia curta (AGCC), teores plasmáticos de glicose e uréia, cinética de degradação ruminal, síntese de proteína microbiana e excreção de nitrogênio. Dois marcadores foram testados para estimar o consumo, LIPE e óxido crômico, e o escolhido para estimar o consumo foi o óxido crômico. A suplementação energética reduziu linearmente (P<0,05) o consumo de forragem, mas aumentou o consumo total de MS e de NDT (P<0,05). As taxas de substituição foram mais altas no nível 0,3%, intermediária no nível 0,6% e mais baixa no nível 0,9% do PC (P<0,05). Entre as variáveis do comportamento animal houve efeito apenas para o tempo de pastejo (P<0,05), que foi reduzido, e para o tempo de ócio (P<0,10) que foi aumentado com a suplementação. Houve efeito da suplementação apenas na produção de propionato, entre os AGCC, sendo aumentada linearmente (P<0,05) em função da suplementação. O pH não foi alterado em função dos níveis de suplementação, estando entre valores recomendados para manutenção dos microrganismos celulolíticos. A concentração ruminal de N-NH3 e a excreção de nitrogênio foram reduzidas com a suplementação (P<0,05). A síntese de proteína microbiana foi aumentada (P<0,05) em função dos níveis crescentes de suplementação, o que demonstra o efeito da sincronia de energia e proteína no rúmen. Não houve efeito significativo para os parâmetros sanguíneos (glicose e uréia). A suplementação melhorou a degradação da fração fibrosa, aumentando a fração potencialmente degradável da FDN (P<0,05), e reduzindo a fração indigestível da FDN. Não houve efeito (P<0,05) no lag time para a degradação da fibra. A redução no consumo de forragem em função da suplementação energética não está associada a prejuízos no pH ruminal e na degradação da fração fibrosa. A suplementação energética de bovinos de corte mantidos em pastagens de bom valor nutritivo e manejadas intensivamente no período das águas promove aumentos na síntese de proteína microbiana e melhorias na degradação da fibra. / The objective of this trial was to evaluate the effects of different levels of energy supplementation on metabolic parameters (blood and ruminal), forage intake, animal behavior and ruminal kinetics of Nelore steers raised in tropical pasture during the rainy season. Each level of supplementation was considered a treatment and consisted of: T1) control (only mineral supplementation); T2) supply of 0.3% BW of energetic concentrate; T3) supply of 0.6% of BW of energetic concentrate; T4) supply of 0.9% of BW of energetic concentrate. Eight Nelore rumen-cannulated steers, averaging 410 kg BW and 48 months of age were assigned to two 4x4 Latin square and allotted in 1 ha of Brachiaria brizantha cv. Marandu pasture. The parameters evaluated were forage intake, ruminal pH and concentration of NH3 and short chain fatty acids (SCFA), blood nitrogen urea and blood glucose, ruminal kinetics, microbial synthesis, nitrogen excretion and animal behavior. The marker that better estimated the intake was chromium oxide. Forage intake (% BW) decreased (P<0.05) and total DM intake increased (P<0.05) as levels of supplementation increased. Substitution rates decreased (P<0.05) as the supplementation level increased, explaining the higher total DM intake. Among the ingestive behavior variables, only grazing time, that decreased (P<0.05), and rest time, that increased (P<0.10), as the supplement level increased, were affected by supplementation. Among the SCFA, only the propionate concentration was affected (P<0.05) by the treatments, increasing as the levels increased. The ruminal pH was not affected by supplementation and was among the recommended values for maintenance of cellulolytic microorganisms. The concentration of NH3 and nitrogen excretion decreased (P<0.05), and the microbial synthesis increased (P<0.05) as levels of supplement increased, as a result of the better synchronization between energy and protein in the rumen. Blood variables (glucose and urea nitrogen content) were not affected by treatments. Supplementation improved fiber degradation, by increasing the potential degradable fraction of NDF (P<0.05). There was no effect on the lag time of fiber degradation, confirming that the supplementation had no negative effects on the ruminal environment. The decreasing on forage intake as the supplement level increased was not associated neither to inadequate ruminal pH nor to impairment of fiber degradation. Energetic supplementation for beef cattle grazing tropical pastures intensively managed during rainy season improves microbial synthesis and fiber degradation.
|
Page generated in 0.0643 seconds