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J Uhrig

Publications and source records attributed to J Uhrig.

7 recordsLinked to original sources
PubMed2007

Epidermal pattern formation in the root and shoot of Arabidopsis.

Root hair formation, stomata development on hypocotyls and trichome formation on leaves in Arabidopsis represent three model systems for epidermal patterning in plants that involve a common set of genes or corresponding homologues. The resulting pattern and the developmental readout are, however, strikingly different. Trichomes become regularly spaced on the leaf surface. Root hairs and stomata-bearing cells are formed in rows at specific locations with reference to the underlying cortex cells. In this review, we summarize the mechanistic similarities and discuss differences that might account for the different outcome of patterning in each system.

Arabidopsis↗
PubMed2000

Effect of a static magnetic field on blood flow to the metacarpus in horses.

OBJECTIVE: To determine the effect of a static magnetic field on relative blood flow to the metacarpus of horses. DESIGN: Randomized controlled clinical trial. ANIMALS: 6 healthy adult horses. PROCEDURE: Red blood cells were radiolabeled in vivo by administration of technetium Tc 99m (pyro- and trimeta-) phosphates, and scintigraphic images were obtained 30 minutes later. A magnetic wrap that emitted a static magnetic field was applied to 1 metacarpus and a control wrap was applied to the contralateral metacarpus. Forty-eight hours later, the wraps were removed, and scintigraphy was repeated. Relative perfusion ratios were calculated by dividing mean count per pixel for the portion of the metacarpus under the wrap by mean count per pixel for a portion of the distal aspect of the antebrachium that was not in the magnetic field. RESULTS: The difference between the relative perfusion ratio prior to application of the wrap and the ratio after application of the wrap for limbs that received the magnetic wrap was not significantly different from the difference in ratio for limbs that received the control wrap. CONCLUSIONS AND CLINICAL RELEVANCE: Results suggest that in horses, the static magnetic field associated with application of commercially available magnetic wraps for 48 hours does not increase blood flow to the portion of the metacarpus underneath the wrap.

Animals↗
PubMed1984

[Fractures in benign bone cysts].

Etiology, clinical manifestations, roentgenographic appearance and histological variations of solitary and aneurysmatic bone cyst are reported. The classification of solitary bone cyst into active and inactive cysts is important therefore prognosis and treatment are different. The critical control of our patients with fractured solitary and aneurysmatic bone cysts since 1973 resulted in a very contenting management of treatment. Active solitary bone cysts, recurrent cysts, fractured cysts and large cysts close to joints are treated by segmental resection, interposing of ribs, homologous or autogenous cancellous bone graft and plate osteosynthesis. We never found recidives under this treatment. The only curettage of active solitary bone cyst frequently is accompanied by recidive and unsatisfying functional results. Reports of local corticoid injections in treatment of bone cysts should be furthermore controlled critical.

Adolescent↗
PubMedDate not supplied

The Rieske protein from purple sulfur bacteria is an extrinsic protein.

The mode of membrane attachment of the Rieske iron-sulfur protein from cytochrome bc1 complex of Rhodospirillum rubrum has been studied using biochemical approaches. In contrast to cytochrome c1 the bacterial Rieske protein was extracted from chromatophores using chaotropic agents (NaSCN, urea, guanidine), an alkaline pH and relatively low concentration of Triton X-100. The results presented here lead to the conclusion, that the Rieske protein from chromatophores is extrinsic and that their association with the rest of the complex involves hydrophobic interactions.

Bacterial Proteins↗