Prevod pokusa sa engleskog. Pomoć
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Tema: Prevod pokusa sa engleskog. Pomoć

  1. #1
    Nov član
    Učlanjen
    16.03.2008.
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    Podrazumevano Prevod pokusa sa engleskog. Pomoć

    Trebalo bi prevesti sljedeći pokus sa engleskog pa ako netko zna engleski pomozite.

    tekst:

    5 g of .... were cut into small pieces and extracted by reflux with 0.4 g of sodium hydroxide in 25 ml of methanol for 1 to 2 hrs. The methanol extract was then filtered to remove particulate materials. After addition of 1 g of filter aid to the methanol extract, which contained 465 to 485 mg of ...., the methanol was removed under reduced pressure. The residue was then mixed with 5.5 ml of 1.0 N sodium hydroxide solution at 35.degree. C. for 10 min. and the pH adjusted to about 11.5 to 11.9 with 50% acetic acid in water. This aqueous extract was then filtered and the precipitate washed with 5.5 ml of 0.01 N sodium hydroxide solution. The combined aqueous filtrate was stirred with 0.5 g of sodium acetate for 10 minutes and filtered again. The filtrate was then extracted twice with 5 ml of toluene and the pH of the aqueous filtrate was then adjusted to pH 9.1, with 50% acetic acid in water. The mixture was allowed to remain for a period of 6-10 hrs at room temperature for complete precipitation and was then filtered. This precipitate was washed with water and dried at room temperature. This final precipitate contained 400-426 mg of ...., which represented a recovery of 86-88% based upon the amount of p. in the initial methanol extract. The purity of .... following this procedure was 84% to 86% by weight.



  2. #2
    Buduća legenda Lexa (avatar)
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    Podrazumevano Re: Prevod pokusa sa engleskog. Pomoć

    Kol'ko plaćaš?
    Janidebi

  3. #3
    Zainteresovan član Insect (avatar)
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    14.09.2004.
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    Podrazumevano Re: Prevod pokusa sa engleskog. Pomoć

    Lol istina Lexo.
    Hej sto si cenzurisao o cemu je eksperiment? Mozda ekstrahujes marihuanu ili koku ili nesto slicno?! Cccc. Mutne su to radnje.

    Pokus?! Tu rec dugo ne cuh na ovim prostorima.

  4. #4
    Aktivan član winkler (avatar)
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    29.06.2006.
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    Podrazumevano Re: Prevod pokusa sa engleskog. Pomoć

    Ako napises sta preciscavas(predostroznosti radi) mozda ti neko i prevede.Poz

Slične teme

  1. Pomoc! PREVOD SA ENGLESKOG
    Autor snaja88 u forumu Arhiva
    Odgovora: 13
    Poslednja poruka: 01.05.2006., 01:28

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