zwakke – -Translation – Keybot Dictionary

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  Cryo SEM  
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De cryomethode heeft het grote voordeel dat het materiaal zo snel ingevroren wordt dat kwetsbare biologische structuren goed behouden worden en dat bij breuk door de kou het materiaal bij voorkeur langs zwakke plekken (bijv. membranen) gekliefd wordt zonder dat er veel vervormingen optreden.
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The cryo-method has the great advantage that the material is so rapidly frozen that vulnarable biological structures are well preserved and that when using cryo-fracture the material breaks clean along weak edges (e.g. membranes) without causing much malformation.
  Haar  
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Als nat haar dat gewenteld is om krulspelden met een foehn gedroogd wordt, worden er ten gevolge van hitte en uitdroging de structurele banden (o.a. zwakke waterstofbanden) in de haarvezels verbroken, waardoor een tijdelijk gekruld aspect verkregen wordt.
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The uneven distribution of consolidating disulphide bridges in the ellipsoid hairs is responsible to for a variable degree of curling. In general people from African ethnical origin have rather flat hair viewed in cross-section compared to Caucasian people, while Asian people have the most roundish and even-sized hairs. Heat and low humidity produced by a hair dryer disrupt the structural bonds (particularly weak hydrogen bonds) enough to give hairs wounded around a roller some temporary curly aspect. However, this effect can be easily abolished by an increase in humidity or contact with water. Setting agents such as gel, hairspray and mousse provide support by coating hairs with a soluble resin. Longer lasting permanents use chemicals such as thioglycolic acid to disrupt the disulphide bonds. While the molecular structure is disrupted the hairs can be shaped to curls. Then, a counteracting product is added to restore the disulphide bridges and retain a semi-permanent wavy structure.
  Lasermicroscopie  
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CLSM biedt de mogelijkheid om zwakke emissie-signalen, die met een gewone microscoop nauwelijks waar te nemen zouden zijn, gevoelig te detecteren en zodanig te versterken dat als resultaat een helder en contrastrijk beeld is weergegeven op een computer monitor (dit is mogelijk ihb dankzij het gebruik van fotomultipliers buizen = PMTs en charge-coupled device = CCD cameras, samen met digitale beeldverwerking).
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The illumination source in CLSM is due to one or several lasers (Light Amplification by the Stimulated Emission of Radiation; More about lasers ...). Lasers have the characteristics that they emit strong and monochromatic light that can be focused to a point-shaped light source, which is favorable for the resolution. In some system the laser beam is pivotted by means of rotating mirrors in order to perform a xy-scan pattern over the object. Synchronously the reflection, transmission or fluorescence signal is collected point-by-point and reconstructed into a xy image. In order to achieve the scan function some microscopes utilize a Nipkow disk instead of mirrors, while others bear a stage able to perform accurate and rapid translations (more about scanning methods ...). CLSM offers possibilities to sensitively detect and enhance weak emission signals, which would be barely distinguished with a normal microscope, so that the final result is a bright and contrasted image displayed on a computer monitor (this is accomplished in particular thanks by the use of photomultipliers tubes = PMTs and charge-coupled device = CCD cameras, in conjunction with digital image enhancement).