Natuurlijke androgenen, oestrogenen en progestagenen in bloed, urine en faeces van jonge runderen : een literatuurstudie

Een literatuurstudie is verricht betreffende de gehalten aan androgenen, oestrogenen en progestagenen in bloed, urine en faeces bij vleeskalveren. Omdat er niet voldoende gegevens beschikbaar waren voor genoemde hormonen in de 3 genoemde matrices bij vleeskalveren zijn ook literatuurgegevens van mannelijke en vrouwelijke fokkalveren in de leeftijdscategorie van ca. 7 tot ca. 11 maanden verwerkt. De meeste analyses zijn uitgevoerd met een radioimmunochemische methode (RIA)

Using a satellite swarm for building a space-based radio telescope for low frequencies

In radio astronomy, as in astronomy in general, a wide range of frequencies is observed as each spectral band o_ers a unique window to study astrophysical phenomena. In the recent years, new observatories have been designed and built at the extreme limits of the radio spectrum. For the low frequencies several Earth-based radio telescopes are constructed at this moment. In the Netherlands, the Low Frequency Array (LOFAR) is being constructed at this moment and will be operational later this year. LOFAR observes the sky between 30 and 240 MHz. Observing at even lower frequencies is very interesting, but, due to the inuence of the Earth's ionosphere this is not possible from Earth. Thus, the only option to observe low frequencies is a telescope in spac

OLFAR - orbiting low frequency array; using a satellite swarm for building a space-based radio telescope for low frequencies

In radio astronomy, as in astronomy in general, a wide range of frequencies is observed as each spectral band offers a unique window to study astrophysical phenomena. In the recent years, new observatories have been designed and built at the extreme limits of the radio spectrum. For the low frequencies several Earth-based radio telescopes are constructed at this moment. In the Netherlands, the Low Frequency Array (LOFAR) is being constructed at this moment and will be operational later this year. LOFAR observes the sky between 30 and 240 MHz. Observing at even lower frequencies is very interesting, but, due to the influence of the Earth’s ionosphere this is not possible from Earth. Thus, the only option to observe low frequencies is a telescope in space

Het effect van de fysieke omgeving op de vorm van anaforen in instructies

Contains fulltext : 62330.pdf (publisher's version ) (Open Access)12 p

Overspecification in written instruction

Contains fulltext : 94593.pdf (publisher's version ) (Open Access)20 p

Gel-chromatographic analysis of 99mTc-labeled human serum albumin prepared with Sn(II) as the reductant

The labeling of human serum albumin (HSA) with 99mTc using Sn(II) as the reductant has been reinvestigated in view of the possibility of formation of Sn-Tc colloids. Preparations of 99mTc-HSA and mixtures of 99mTc-TcO4− with Sn(II)Cl2 have been analyzed by means of gel chromatography using various gel matrices and eluents. No Sn-Tc colloids could be eluted from samples of 99mTc-HSA preparations. The percentage of labeling was about 90%. A comparative investigation of a number of gel-chromatographic systems for the detailed analysis of 99mTc-HSA has been made. It is found that a long column with Sephadex G-200 gives the best results

Gel-chromatographic analysis of 99mTc-labeled human serum albumin prepared with Sn(II) as the reductant

The labeling of human serum albumin (HSA) with 99mTc using Sn(II) as the reductant has been reinvestigated in view of the possibility of formation of Sn-Tc colloids. Preparations of 99mTc-HSA and mixtures of 99mTc-TcO4− with Sn(II)Cl2 have been analyzed by means of gel chromatography using various gel matrices and eluents. No Sn-Tc colloids could be eluted from samples of 99mTc-HSA preparations. The percentage of labeling was about 90%. A comparative investigation of a number of gel-chromatographic systems for the detailed analysis of 99mTc-HSA has been made. It is found that a long column with Sephadex G-200 gives the best results

Overspecification facilitates object identification

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De rol van overspecificatie in instructieve teksten

Contains fulltext : 63193.pdf (publisher's version ) (Closed access