The present paper reports alterations in osteogenesis recorded in mandibular condyles 3-18 days after the removal of marrow tissue from tibial bones. Computerized histomorphometric evaluation of undecalcified condyles revealed a considerable increase in the thickness of condylar cartilage, in particular, the zone of provisional calcification. Measurements of the subcartilaginous trabecular bone suggested an increase in the number of osteoblasts and in their activity. The systemic enhancement of osteogenesis may be initiated by circulating factors released at the affected limb during regeneration of the marrow.
The effect of primary emulsifier concn. (Span 80) in a system contg. Tween 80, mineral oil, and H2O on H2O transport due to an osmotic gradient was studied by a Coulter counter method. Diln. of W/O/W emulsions with dil. NaCl caused a decrease in multiple drop diam. due to loss of internal H2O. The primary mechanism appears to be micelle transport. [on SciFinder(R)]
Water-in-oil microemulsions provide an organized environment that effectively controls photosensitized electron transfer processes. Effective charge sepn. and stabilization of the intermediate photoproducts against back electron transfer processes are achieved by means of hydrophobic and hydrophilic interactions of the photoproducts with the water-oil phases. Water-oil 2-phase systems also provide a means for induced disproportionation of a photogenerated 1-electron transfer product to the corresponding 2-electron charge relay. This induced disproportionation can be achieved by design of opposite soly. properties of the comproportionation products in the 2 phases. The 2-electron charge relay mediates the redn. of meso-1,2-dibromostilbene to trans-stilbene. An alternative route for generating multielectron charge relays involves the enzyme-catalyzed prodn. of NADPH using the 4,4'-bipyridinium radical cation as an electron carrier. NADPH is subsequently utilized in the redn. of 2-butanone to (-)-2-butanol in the presence of the enzyme alc. dehydrogenase. [on SciFinder(R)]
In a terminological note with the title, “The Possessive Relation Marker in Coptic” (Enchoria 12:191–193, 1984), P. Swiggers criticizes and corrects the conventional designation “possessive article” or “possessive prefix” for ⲡⲁ-/ⲧⲁ-/ⲛⲁ- “he/she/they of-” and, much less explicitly, {ⲡⲉϥ-} “his”. Following several arguments meant to establish that these morpheme set(s) are “neither an article, nor a prefix”, Dr. Swiggers offers to replace the current terms with a new one, namely “possessive relation-marker”, presumably for both {ⲡⲁ-} and {ⲡⲉϥ-}.