摘要:
Processing of .beta.-amyloid precursor protein (.beta.APP) is monitored by detecting the secretion of a soluble amino-terminal fragment or .beta.APP (ATF-.beta.APP) resulting from cleavage of .beta.APP at the amino-terminus of .beta.-amyloid peptide. Secretion of ATF-.beta.APP in animal models may be monitored to identify inhibitors of .beta.-amyloid production. The ATF-.beta.APP may be detected using antibodies and other specific binding substances which recognize a carboxy terminal residue on the fragment. Animals expressing the Swedish mutation of .beta.APP are described which produce abundant amounts of ATF-.beta.APP.
摘要:
The invention provides transgenic non-human animals and transgenic non-human mammalian cells harboring a transgene encoding an APP polypeptide comprising the Swedish mutation.
摘要:
The invention provides transgenic non-human animals and transgenic non-human mammalian cells harboring a transgene encoding an APP polypeptide comprising the Swedish mutation.
摘要:
The invention provides transgenic non-human animals and transgenic non-human mammalian cells harboring a transgene encoding an APP polypeptide comprising the Swedish mutation.
摘要:
The invention provides transgenic non-human animals and transgenic non-human mammalian cells harboring a transgene encoding an APP polypeptide comprising the Swedish mutation.
摘要:
The invention provides transgenic non-human animals and transgenic non-human mammalian cells harboring a transgene encoding an APP polypeptide comprising the Swedish mutation.
摘要:
The invention provides transgenic non-human animals and transgenic non-human mammalian cells harboring a transgene encoding an APP polypeptide comprising the Swedish mutation.
摘要:
The invention provides transgenic non-human animals and transgenic non-human mammalian cells harboring a transgene encoding an APP polypeptide comprising the Swedish mutation.
摘要:
This invention relates to a light delivery and collection device for performing spectroscopic analysis of a subject. The light delivery and collection device comprises a reflective cavity with two apertures. The first aperture receives excitation light which then diverges and projects onto the second aperture. The second aperture is applied to the subject such that the reflective cavity substantially forms an enclosure covering an area of the subject. The excitation light interacts with the covered area of the subject to produce inelastic scattering and/or fluorescence emission from the subject. The reflective cavity reflects the excitation light as well as the inelastic scattering and/or fluorescence emission that is reflected and/or back-scattered from the subject and redirects it towards the subject. This causes more excitation light to penetrate into the subject hence enabling sub-surface measurement and also improves the collection efficiency of the inelastic scattering or fluorescence emission. The shape of the reflective cavity is optimized to further improve the collection efficiency.
摘要:
This invention relates to an apparatus and method for performing bidirectional Raman spectroscopy of a sample, preferably a diffusely scattering sample, in which two excitation light sources are employed to illuminate the sample from two opposite directions to excite Raman scattering signal from the sample. The Raman scattering signal which transmits through the sample are collected by two optical devices each positioned on the opposite side of the sample to obtain two transmission Raman spectra of the sample, which enables the accurate determination of the composition of the whole sample.