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At least 1,423 records · Page 79Linked to original sources
PubMed2001

[Spectral emissivity of thin films].

In this paper, the contribution of multiple reflections in thin film to the spectral emissivity of thin films of low absorption is discussed. The expression of emissivity of thin films derived here is related to the thin film thickness d and the optical constants n(lambda) and k(lambda). It is shown that in the special case d-->infinity the emissivity of thin films is equivalent to that of the bulk material. Realistic numerical and more precise general numerical results for the dependence of the emissivity on d, n(lambda) and k(lambda) are given.

Absorption↗
PubMedDate not supplied

[The SRK formula for calculating the power of intraocular anterior-chamber lenses].

Presented is the evaluation of the usefulness of the SRK formula for the calculation of the power of the intraocular anterior chamber lens of Pannu type. This accuracy is characterised by the value of the postoperative deviation of refraction of the operated eye. It has been noticed that the value of this deviation is fluctuating in the early postoperative period. Its stabilization comes out not before the 6th-9th month after surgery. This points out to the necessity of calculating the correcting coefficient A for the SRK formula into the late postoperative period.

Anterior Chamber↗
PubMed2003

[Evaluation of molecular weights of hyaluronate preparations by multi-angle laser light scattering].

Hyaluronate (HA), a glycosaminoglycan polysaccharide, has been used for osteoarthritis, periartritis of the shoulder and rheumatoid arthritis by intraarticular administration, and in ophthalmic surgery such as anterior segment surgery, and eye lotion. In this study, the molecular weight (Mw) of HA preparations were estimated by size-exclusion chromatography (SEC) system consisted of a refractometer (RI) and a multi-angle laser light scattering (MALS). From the results, it has been clarified that a successful characterization of HA samples with Mw up to 2 - 3 x 10(6) g/mol was possible by multidetector system.

Chromatography, Gel↗