Synthesis and magnetism of single-phase Mn-Ga films" (2015). David Sellmyer Publications. 252. Single-phase noncubic Mn-Ga films with a thickness of about 200 nm were fabricated by an in situ annealing of [Mn(x)/Ga(y)/Mn(x)] 5 multilayers deposited by e-beam evaporation. Mn-Ga alloys prepared in three different compositions Mn 2 Ga 5 and Mn 2 Ga were found to crystallize in the tet-ragonal tP14...

Shoots of mature grafted propagules of Picea abies (L.) Karst. metabolized [(3)H]gibberellin A(4) (GA(4)) to at least 14 acidic substances, two of which were tentatively identified by gas-liquid radiochromatography as GA(2) (possibly an artifact) and GA(34). [(3)H]GA(9) was converted into a number of metabolites, one of which was chromatographically similar to, but not identical with, GA(4). Me...

We present first-principles calculations of the isotropic NMR Ga shielding in metallic MGa2 with M = Ca, Sr, Ba and MGa4 with M = Na, Ca, Sr and Ba. We show that the experimentally observed trend of Ga NMR shifts is as expected driven mainly by the spin part of the response, but the orbital contribution must not be neglected. For all analyzed compounds the spin contact term constitute the major...

To interpret the metabolism of radiolabeled gibberellins A(12)-aldehyde and A(12) in shoots of pea (Pisum sativum L.), the identity of the radiolabeled peaks has to be determined and the endogenous presence of the gibberellins demonstrated. High specific activity [(14)C]GA(12) and [(14)C]GA(12)-aldehyde were synthesized using a pumpkin endosperm enzyme preparation, and purified by high performa...

Bioactive gibberellins (GAs) are phytohormones that regulate growth and development throughout the life cycle of plants. DELLA proteins are conserved growth repressors that modulate all aspects of GA responses. These GA-signaling repressors are nuclear localized and likely function as transcriptional regulators. Recent studies demonstrated that GA, upon binding to its receptor, derepresses its ...

We have previously identified GAMYB, a gibberellin (GA)-regulated transcriptional activator of alpha-amylase gene expression, in aleurone cells of barley (Hordeum vulgare). To examine the regulation of GAMYB expression, we describe the use of nuclear run-on experiments to show that GA causes a 2-fold increase in the rate of GAMYB transcription and that the effect of GA can be blocked by abscisi...

Bioactive hormone concentrations are regulated both at the level of hormone synthesis and through controlled inactivation. Based on the ubiquitous presence of 2beta-hydroxylated gibberellins (GAs), a major inactivating pathway for the plant hormone GA seems to be via GA 2-oxidation. In this study, we used various approaches to determine the role of C(19)-GA 2-oxidation in regulating GA concentr...

Previously, we reported that the rice dwarf mutant, d1, is defective in the alpha subunit of the heterotrimeric G protein (Galpha). In the present study, gibberellin (GA) signaling in d1 and the role of the Galpha protein in the GA-signaling pathway were investigated. Compared with the wild type, GA induction of alpha-amylase activity in aleurone cells of d1 was greatly reduced. Relative to the...

Department of Urology, Emory University School of Medicine, Atlanta, GA 30322, USA. The Atlanta VA Medical Center, Decatur, GA 30033, USA. Emory University Winship Cancer Institute, Atlanta, GA 30322, USA. Department of Pathology and Laboratory Medicine, Emory University School of Medicine, Atlanta, GA 30322, USA. Department of Hematology and Medical Oncology, Emory University School of Medicin...

Clustering method for remote sensing satellite image classification based on Messy Genetic Algorithm: GA is proposed. Through simulation study and experiments with real remote sensing satellite images, the proposed method is validated in comparison to the conventional simple GA. It is also found that the proposed clustering method is useful for preprocessing of the classifications. Keywordsclus...