A new variant of processing photographic plates for holography based on dichromed gelatin PFG-04 (produced by JSC "Slavich Company", Pereslavl-Zalessky) the manufacture high-frequency relief–phase holographic gratings with a spatial frequency up to 1500 mm-1 is proposed. The technology selective destructive effect short-wave UV radiation and subsequent etching layer various reagents. For first ...

background : labor pain relief has been considered since many years ago. heat as a non pharmacological method of pain relief helps reducing the pain intensity and increases the pain consistency. the aim of the study was to determine the effect of the heat therapy on the labor pain in primigravida women. methods : in this clinical trial study, 64 low risk nulliparous women were randomly divided ...