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Sample records for addukt tri-n-butil fosfata

  1. EFEITO DA ADUBAÇÃO FOSFATA SOBRE O ACÚMULO DE BIOMASSA E TEOR DE BRIX DE DUAS VARIEDADES DE CANA-DE-AÇÚCAR

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    Sihélio Júlio Silva Cruz

    2009-01-01

    Full Text Available The objective of this study was to evaluate the accumulation of matter, dry matter content of Brix and two varieties of sugar cane, influenced by the phosphorus cultivated on "Zona da Mata" region, State of Alagoas. The experiment, a factorial 2 x 6, was composed of two varieties of cane; RB867515 and RB92579 and six phosphorus levels: zero, 30, 60, 90, 120 and 150 kg ha-1, with the source of the phosphorus triple superphosphate . Was also used nitrogen and potassium in doses equivalent to 100 and 200 kg ha-1 and K, respectively. The soil of the experimental area was set to raise the base saturation to 60%. At the beginning of the first rainfall of the rainy season of 2006 was performed with micro fertilization in coverage, in doses equivalent to 6,0; 6,0 and 7,0 kg ha-1 of Cu, Zn and Mn, respectively. Was The chemical control of weeds. Every month, from August to October 2006, samples were collected in the cane plant. There was initially the number of plants m2, followed by weighing the material. It was subsequently withdrawn a subsample containing ten plants for weighing. After weighing the material was passed in horsemanship and homogenized, again drew up a sample of approximately 300g, leading them to forced ventilation oven at 65 ºC, to obtain constant weight. Resulting in the production of natural (MN and dry matter (DM. In July, we analyzed the levels of Brix% juice in the refractometer Brix. The average values of production of natural (MN, dry matter (DM and contents of Brix% were subjected to analysis of variance and regression for variables. The accumulation of dry matter and were influenced by fertilization. The contents of Brix% in two varieties did not suffer significant influence of fertilization.

  2. Reduktive Synthese zu neuartigen cyclischen und acyclischen Borverbindungen

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    Claes, Christina

    2016-01-01

    Ein Teil der hier vorliegenden Arbeit beschäftigte sich mit der Synthese und Charakterisierung neuer Boran-Addukte. Dabei wurden neben den NHCs IMe und IMeMe die Phosphane PEt3 und PMe3 als stabilisierende Lewisbasen eingesetzt. Neben dem Liganden wurde auch der borgebundene organische Rest variiert (Phenyl und n-Butyl), um deren Einfluss auf die Eigenschaften der Addukte zu untersuchen. Die NHC-stabilisierten Monoborane IMe∙B(nBu)Cl2 (99) und IMeMe∙B(Ph)Cl2 (100) konnten in guten Ausbeuten i...

  3. ESTUDIO CINÉTICO DE CICLACIÓN 5-exo DEL CATIÓN RADICAL a-AMONIO DISTÓNICO, a-[N-(3-METIL-3-BUTENIL,N,N-(DIMETIL] AMONIOMETILO

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    Luz Amalia Ríos

    2008-02-01

    Full Text Available La ciclación del catión radical a-amonio distónico análogo a un sistema 5-hexenilo hidrocarbonado con un sustituyente metilo en la posición 5 y generado a partir de yoduro de N-(3-metil-3-butenil, N,N-(dimetil-N-yodometilamonio vía radicales, se estudió cinéticamente usando el método de competencia unimolecular vs. bimolecular. Así, bajo condiciones de pseudo primer orden con el agente reductor y propagador de cadena por radicales, tri-n-butil estaño (n-Bu3SnH e iniciación fotoquímica, se determinó la constante de ciclación como kc = 2,9 x 107, la cual siendo muy alta no deja dudas de la regioselectividad de esta ciclación en la formación de anillos pirrolidínicos sustituidos en la posición 3, con reconocido potencial sintético.

  4. Primjena industrijskog otpada CaF2 u procesu ozelenjivanja odlagališta fosfogipsa

    OpenAIRE

    Leaković, S.; Lisac, H.; Vukadin, R.

    2012-01-01

    U procesu proizvodnje fosforne kiseline nastaje fosfogips kao sporedni produkt reakcije sirovog fosfata i sumporne kiseline. On se kao neopasni otpad trajno odlaže na posebno uređenom odlagalištu. Prilikom proizvodnje fosforne kiseline nastaje i otpadna voda onečišćena fluoridima i fosforom. Takva otpadna voda se prije ispuštanja u prirodni prijamnik obrađuje neutralizacijom vapnenim hidratom. Nastali produkt neutralizacije je kalcijev fluorid (CaF2), koji se kao neopasni otpad odlaže u po...

  5. EFEITO DA ADIÇÃO DE HIDROCOLÓIDES EM SISTEMAS MODELO CARNE-ÁGUA

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    Garcia-Cruz, Crispin Humberto; Scamparini,Adilma Regina Pippa

    2009-01-01

    RESUMO: Foram testados diferentes tipos de hidrocolóides comerciais num sistema carne-água na proporção 1:2. Utilizaram-se diferentes concentrações (1% a 6%) dos hidrocolóides: carboximetilcelulose de sódio, gelatina, amido de mandioca, amido modificado por fosfatação, goma arábica, goma guar, goma tragacanta, goma xantana, goma locusta, carragena, alginato de sódio, pectina de alto e baixo teor de metoxilação e a mistura das gomas xantana-locusta. Dos resultados obti...

  6. Product analysis and kinetics of Br-initiated gas-phase oxidation of dimethyl sulphide; Produktanalyse und Kinetik der Br-initiierten Gasphasenoxidation von Dimethylsulfid

    Energy Technology Data Exchange (ETDEWEB)

    Becker, K.H.; Maurer, T.

    1996-07-01

    High Br concentrations in maritime environments may render the reaction between Br radicals and dimethyl sulphide an important process. According to the literature this system has as yet not been studied with a mind to clarifying the reaction mechanisms and performing a product analysis. Thus, for example, the decomposition of the DMS-Br adduct remains to be clarified. The purpose of the present study was therefore to examine the reaction between dimethyl sulphide and Br radicals and so gain information on the decomposition mechanism. This implied a determination of the velocity constant and a product analysis of the reaction between Br radicals and dimethyl sulphide. In addition the velocity constant of the reaction between Br radicals and dimethylsulphoxide (a consequent product of DMS oxidation) was to be determined. (orig.) [Deutsch] Hohe Br-Konzentrationen in maritimen Gebieten machen die Reaktion von Br-Radikalen mit Dimethylsulfid moeglicherweise zu einem wichtigen Prozess. In der Literatur fehlen eingehende Untersuchungen dieses Systems hinsichtlich der Aufklaerung der Reaktionsmechanismen und der Produktanalyse. So ist zum Beispiel der Zerfall des DMS-Br-Adduktes nicht aufgeklaert. Aus diesen Gruenden soll im Rahmen dieser Arbeit die Reaktion von Dimethylsulfid mit Br-Radikalen untersucht werden, um Informationen ueber den Abbaumechanismus zu erhalten. Darunter fallen die Bestimmung der Geschwindigkeitskonstanten und die Produktanalyse der Reaktion von Br-Radikalen mit Dimethylsulfid. Zusaetzlich soll die Geschwindigkeitskonstante der Reaktion vom Br-Radikalen mit Dimethylsulfoxid (einem Folgeprodukt der DMS-Oxidation) bestimmt werden. (orig.)

  7. Long term results of surgery in Perthes disease: Comparison of X-ray and MR-studies; Spaetergebnisse nach operativer Behandlung des Morbus Perthes: Vergleich der roentgenologischen und kernspintomographischen Untersuchung

    Energy Technology Data Exchange (ETDEWEB)

    Tosch, U. [Strahlenklinik und Poliklinik, Universitaetsklinikum Rudolf Virchow, Berlin (Germany); Sparmann, M. [Orthopaedische Klinik im Oskar-Helene-Heim, Berlin (Germany); Stelling, E. [Orthopaedische Klinik im Oskar-Helene-Heim, Berlin (Germany); Tomala, D. [Strahlenklinik und Poliklinik, Universitaetsklinikum Rudolf Virchow, Berlin (Germany)

    1995-05-01

    Twenty patients treated by surgery for Perthes` disease were studied between 4 and 9 years postoperatively. In the clinical investigation eight patients complained of persistent stress-induced pain. In nine patients flexion, extension, ab- and adduction of the hip joint was limited. In the MRI-Study of ten hip joints a reduction of fatty marrow was seen in the femoral head. In 11 hip joints of patients complaining of persistent pain, a deformation of the femoral head (n = 2), a dysplasia of the femoral metaphysis (n = 2), and diaphysis (n = 4) or both (n = 2) were seen. In another five patients an additional dysplasia of the acetabulum was visualized. All these findings were diagnosed by X-ray studies as well. However, only by MRI were the extents of the postoperative defects of femoral spongiosa diagnosed in fifteen hip joints. (orig.) [Deutsch] 20 wegen eines Morbus Perthes operierte Patienten wurden 4-9 Jahre nach einer Umstellungsosteotomie klinisch, radiologisch und kernspintomographisch untersucht. Bei der klinischen Nachuntersuchung gaben 8 Patienten persistierende Beschwerden bei Belastung an. Bei der koerperlichen Untersuchung war die Flexion und Extension bei 9 sowie die Abduktion und Adduktion bei einem Patienten eingeschraenkt. Bei der kernspintomographischen Untersuchung liessen sich bei 10 Hueftgelenken Residuen des M. Perthes im Fettmark des Femurkopfs nachweisen. An 11 Hueftkoepfen wurden pathologische Veraenderungen wie eine Femurkopfentrundung (n = 2), eine Deformierung der Femurmeta- (n = 3) und -diaphyse (n = 4) bis hin zur hirtenstabfoermigen Konfiguration (n = 2) nachgewiesen. Bei 5 Patienten wurde eine Pfannendysplasie gefunden. Diese Befunde waren auch roentgenologisch darzustellen. Als postoperative Defekte waren im Schaftmark des Femurs eine langstreckige Hoehlenbildung mit Zysten oder durch Fettmark aufgefuellte Spongiosadefekte bei 15 Hueftgelenken nur kernspintomographisch nachweisbar. (orig.)

  8. EFEITO DA ADIÇÃO DE HIDROCOLÓIDES EM SISTEMAS MODELO CARNE-ÁGUA

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    CRISPIN HUMBERTO GARCIA-CRUZ

    2009-07-01

    Full Text Available

    RESUMO: Foram testados diferentes tipos de hidrocolóides comerciais num sistema carne-água na proporção 1:2. Utilizaram-se diferentes concentrações (1% a 6% dos hidrocolóides: carboximetilcelulose de sódio, gelatina, amido de mandioca, amido modificado por fosfatação, goma arábica, goma guar, goma tragacanta, goma xantana, goma locusta, carragena, alginato de sódio, pectina de alto e baixo teor de metoxilação e a mistura das gomas xantana-locusta. Dos resultados obtidos, selecionaram-se aqueles hidrocolóides que proporcionaram maior estabilidade ao sistema após o cozimento. Os hidrocolóides selecionados foram as gomas guar, xantana, locusta e a mistura xantana-locusta, sendo que, destes, a goma xantana, a goma guar e a goma locusta proporcionaram melhores resultados na estabilidade do sistema ao cozimento (99,0%, 90,5% e 91,0%, respectivamente e a menor sinerese (0,01; 0,08 e 0,10 ml/g de pasta na concentração de 1,0%. Determinou-se também a capacidade emulsificante dos hidrocolóides anteriormente selecionados. Os resultados obtidos mostraram que a goma xantana proporcionou a capacidade emulsificante mais elevada, quando comparada com a capacidade emulsificante obtida com as gomas guar, locusta e a mistura xantana-locusta. PALAVRAS-CHAVE: Hidrocolóides; sistema modelo; emulsão; gomas.

  9. Fracionamento a seco da farinha de aveia e modificação química da fração rica em amido Dry fractionation of oatmeal and chemical modification of starch rich fraction

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    Ana Paula Daniel

    2006-12-01

    Full Text Available O estudo teve por objetivo obter frações de farinha de aveia enriquecidas em amido e em fibras pelo fracionamento a seco e modificar quimicamente (fosfatação o amido da fração rica neste constituinte, avaliando suas propriedades funcionais. O fracionamento foi efetuado utilizando-se as granulometrias > 300, 212-300, 150-212, e 300 µm e 212-300 µm foram semelhantes, com aumento de aproximadamente 1,5 e 2,7 vezes nos teores de proteína e fibra, e redução de 0,5-0,6 vezes no teor de amido, quando comparadas à farinha integral. As frações 212-150 µm e The objective of this study was to obtain starch and fiber enriched oatmeal fractions through sieving, chemically modifying (phosphorylation the starch enriched fraction, and evaluating its functional properties. Fractionation was performed using > 300, 212-300, 150-212, and 300 µm and 212-300 µm were similar and had increased protein and fiber content (1.5 and 2.7 fold, but reduced starch content (0.5-0.6 fold when compared to whole oatmeal. Fractions 212-150 µm and < 150 µm were similar and had the highest starch content (around 70%. The starch-rich fraction < 150 µm that had the highest yield during sieving (35.5% was phosphorylated with sodium tripolyphosphate at 150-155 °C for 20 and 40 min, yielding 0.39 and 0.32% phosphorus bound, respectively. Cold water binding capacity increased (1.9-3.3 fold, while syneresis at 5 °C or after freezing/thawing was significantly reduced (6-20 and 5-6 fold, respectively in phosphorylated starch fraction when compared to the native starch fraction. Phosphorylation reduced the increase of pasta opacity during storage at 5 °C, which indicates a lower retrogradation tendency. Thus, oatmeal sieving yielded fractions either enriched in fiber and protein or enriched in starch. Moreover, phosphorylation of the starch-rich fraction improved their functional properties, which may increase the potential applicability and economic value of this

  10. The effect of prostaglandin synthase inhibitor, aspirin on the rat intestinal membrane structure and function El efecto del inhibidor de la sintasa de prostaglandina, aspirina, sobre la estructura y función de la membrana intestinal de la rata

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    G. Kaur

    2010-04-01

    and biological functions of the intestinal membrane.Se encontró que la aspirina a una dosis de 50 mg/kg de peso corporal disminuye la actividad de las enzimas asociadas a la membrana con borde en cepillo (MBC del intestino de la rata como la sucrasa, lactasa, maltasa y fosfata alcalina. El tratamiento con aspirina también produjo una disminución de la microviscosidad en la membrana nativa así como en la membrana tratada con alcohol bencílico, lo que podría deberse a la lesión de peroxidación lipídica de la membrana. La correlación física de la lesión oxidativa de la membrana fue evidente como mostró el estudio Fourier Transformation Infra Red (FTIR de la membrana tratada con aspirina, que incluía un aumento en la proporción de la conformación levo a trans, un cambio en las frecuencias de estiramiento metileno C-H asimétrico y simétrico, el estiramiento de los dobles enlaces C = O, la curvatura NH, la curvatura anti-simétrica (N-CH3, el estiramiento C-N y el estiramiento anti-simétrico CNC, mientras que no hubo cambios en el movimiento y retorcimiento CH2 ni en la curvatura NH del enlace amida I y II. El tratamiento con aspirina también produjo una alteración en el transporte de glucosa e histidina, como se evidenció por una disminución del valor de la Vmax mientras que la Km aparente permaneció inalterada en los animales control y tratados con aspirina, lo que confirma que no hubo cambios en la constante de afinidad por el sustrato de las proteínas transportadoras de membrana para la glucosa y el aminoácido básico, si bien la tasa de transporte disminuyó considerablemente. Se apreció un descenso en la energía de activación del transporte de glucosa e histidina cuando se estudiaron a temperaturas distintas, pero no hubo cambios en la temperatura de la fase de transición de la MBC con el tratamiento con aspirina, lo que implica que quizás la fase de transición termotrópica en la membrana pudiera tener un efecto relativamente peque