Abstract A novel multi-wavelength densitometer was built for the purpose of continuous and simultaneous measurements light obscuration in smoke layers, concurrently five bands (λ = 450 nm, 520 658 830 nm 980 nm). This device used determining transmittance visibility parameters a layer from fire 1.00 dm 3 n-Heptane 0.33 × m tray located test chamber (9.60 9.80 4.00 ). The performance compared wi...

An ultramicro electrophoretic technique for the separation of serum lipoproteins is described using agarose gel on microscope slides.The interaction between the agarose gel and lipoproteins has been reduced and the separation between beta- and pre-beta-lipoproteins has been improved over existing methods. A semiquantitative assay of the lipoproteins can be done in a densitometer. It is suggeste...

Thin-layer acrylamide gel electrophoretic technique, based on the method described by Nandi and Lewis,' has been used in our laboratory for the electrophoresis of blood and malaria parasite enzymes. It was found that preservation of the enzyme electropherograms in acid solution is cumbersome, space-occupying, and unstable. Alternative methods for permanent recording of the electropherograms are...

The amount of light received by a document during a scanning or photocopying process has been addressed in different papers. The purpose of this study is to propose an alternative way to evaluate the irradiation that reaches the surface of the documents during these operations measuring the density produced on a photographic paper during the scanning. This method, requiring a densitometer and a...

An increase in femoral and tibio/fibular bone mass following periosteal membrane stimulation by Moloney sarcoma virus inoculation into thigh muscles of mice was measured in situ on formalin fixed excised hind limbs using a Hologic 4500A Fan Beam X-ray bone densitometer adapted for small bone samples. These results were verified by measurements of constant dry bone mass of the same bones liberat...

FIG. 1.-Ultraviolet pH 12.15 2 photographs and densitometer tracings of typical pneumococcal DNA bands in CsCl, with reference bands of dAT polymer (1) and M. lysodeikticus DNA (2). Top: pH 12.15; mid. N D die: dAT plus nativeandi heat-enatured pneumopH7 coccal DNA, pH 7; bottom: J native, pH 7. Centrifuged 21 hr at 44,770 rpm, 2 25.00C. The dAT andM. lysodetkticus bands at pH 12 are still rath...

Identical amounts of each protein were analyzed by SDSPAGE and with the Experion system (Bio-Rad Laboratories). For SDS-PAGE, samples were prepared by mixing equal volumes of protein sample and 2x Laemmli sample buffer with or without 5% β-mercaptoethanol. Following separation on CriterionTM Tris-HCl 4–20% precast gels, gels were stained with Bio-SafeTM colloidal Coomassie Blue stain and imaged...