1HE BAIRD ASSOCIATES FLAME PHOTOMETER designed by White (1) has many advantages in the clinical laboratory for the measurement of serum sodium and potassium because of its simplicity and reliability. A balanced 2-photocell circuit with lithium salt in the diluent as an internal standard largely eliminates the effect of liquid height in the entrance funnel, gas and air pressure, flame’temperatur...

OBJECTIVE The purpose of this study was to assess funnel type and pregnancy duration in women with previous spontaneous preterm birth and cervical length <25 mm. STUDY DESIGN We performed a secondary analysis of a multicenter randomized trial of cerclage. At the randomization scan that documented short cervix, the presence and type of funnel (U or V) were recorded. RESULTS One hundred forty...

A modified ion funnel is described. Counterintuitively, increased spacing between electrodes results in enhanced "focusing" of the ions through the funnel. Consequently, the internal diameter (i.d.) of the funnel need not decrease to the conductance limit (as in previous designs). A simple dc-only lens, which also serves as the conductance limit, combined with the natural flow of gas is used to...

in order to investigate the influence of bio- and chemical fertilizers on growth parameters and essential oil of fennel (foeniculum vulgare miller.), an experiment based on randomized complete blocks design with five treatments and three replications was carried out. arbuscular mycorrhizal fungi (strain sebacina vermifera) and phosphate dissolving bacteria (genera peseudomonas) were applied as ...

In fiber concretes, microcracks in the boundary area between the cement paste and the surface of aggregates or fibers are higher. Natural and artificial pozzolans can be used for reinforcing this area. In this research, the combination of glass fiber, zeolite, and nano silica particles were used in lightweight self-compacting concrete containing scoria. Fiber volume fractions between 0% to 1.5%...

SCGC (self-compacting geopolymer concrete) contains a new hybrid of self-compacting concrete and concrete, under the development in recent years, regarded to be an environmentally beneficial building material, as it does not use Portland cement traditional binder, its flowability eliminates need for vibrator application. Local pozzolanic materials containing silica (SiO2) alumina were utilized ...