Filaments of the blue-green alga Anabaena variabilis permeabilized by dimethylsulfoxide (DMSO) produce increased amounts of 5-aminolevulinate in the presence of levulinic acid. The metabolic activity of the filaments remains unperturbed in the presence of up to 7.5% (v/v) DMSO. Studies utilizing DMSO-permeabilized filaments confirm that 5-aminolevulinate is synthesized preferably from glutamate...

To provide information on the identification and quality evaluation of Q. variabilis virgin cork from Korea, qualitative anatomical characteristics were observed by optical scanning electron microscopy compared with those suber reproduction Portugal. showed a narrower growth ring than suber. A dark-brown zone sclereids was found only in cork. The lenticular channel is larger that distinct bound...

Clinical and epidemiological characterization of dengue hemorrhagic fever cases in northeastern Brazil. To the Editor: The fungus Apo-physomyces elegans (order Mucorales) is a thermotolerant species that causes severe infections among humans. In contrast to other fungi that cause zy-gomycosis, which have a worldwide distribution and are rarely found in immunocompetent hosts, A. elegans has been...

Erythrokeratoderma variabilis, characterized by migrating erythema and fixed keratotic plaques, is a rare congenital disorder which has recently been connected with connexin (Cx)30.3 or Cx31 gene mutations. We present a 9-month-old Japanese girl who exhibited the typical clinical features of the disease, but carried no Cx30.3 or Cx31 gene mutations. Histopathologically, regular acanthosis with ...

As part of a continuing and more general study of the diversity of parasites from subterranean mammals in central North America, individuals of the Plains Pocket Gopher, Geomys bursarius bursarius, were collected from 7 localities in northwestern Minnesota from September 1991 through October 1996. Arthropods collected included the fleas, Opisocrostis bruneri (4 of 124, 3.2%), Foxella ignota ign...

We study scalar field and electromagnetic perturbations on Locally Rotationally Symmetric (LRS) class II spacetimes, exploiting a recently developed covariant and gauge-invariant perturbation formalism. From the Klein-Gordon equation and Maxwell’s equations, respectively, we derive covariant and gaugeinvariant wave equations for the perturbation variables and thereby find the generalised Regge-...