Search results for "Serp"
showing 10 items of 205 documents
Interés taxonómico de los caracteres micromorfológicos en el género Chaenorhinum (DC.) Rchb. (Plantaginaceae)
2017
TEMA: El objeto de la tesis se enmarca en un tema más amplio en el que el grupo de investigación trabaja, en el que se analizan los caracteres morfológicos y los procesos de especiación de las Antirrhineae del Viejo Mundo, junto con sus implicaciones en la conservación de las especies amenazadas. OBJETIVOS: 1. Profundizar en el conocimiento morfológico de las especies ibéricas perennes y así contrastar los tratamientos previos: • Grupo de Chaenorhinum origanifolium; • Grupo de Chaenorhinum macropodum; • Grupo de Chaenorhinum villosum; • Especies gipsófilas de Chaenorhinum. 2. Sentar las bases morfológicas para la diferenciación de los táxones conflictivos o dudosos del género Chaenorhinum, …
Photochemical derivatization and fluorimetric determination of reserpine in a flow-injection assembly
1991
Abstract The fluorimetric flow-injection determination of reserpine was achieved with the drug being derivatized on-line by photoreaction. PTFE tubing was helically coiled around a germicide lamp located between the injection valve and detector. Two analytical procedures are proposed using either dilute acetic acid or pure methanol as the carrier stream. The influence of foreign compounds was studied and the method was applied to the determination of reserpine in pharmaceutical formulations.
Spectrophotometric Determination of Hydralazine with 2-Hydroxy-1-naphthaldehyde in Pharmaceuticals
1991
Abstract A new extraction-spectrophotometric method for the determination of hydralazine, based on its reaction with 2-hydroxy-1-naphthaldehyde at 25 °C, is described. The calibration curve was linear between 0.4 and 6 mg/mL of hydralazine. The molar absorbtivity of the product at 408 nm is 40 900 L · mol − 1 · cm − 1 . The method described was applied to the analysis of hydralazine in pharmaceutical preparations containing reserpine, hydrochlorothiazide, bendrofluorthiazine, propranolol, and other substances. The agreement with the U.S.P. XXI method was satisfactory for tablets and injections, but not for pellets.
The lack of the effect of DA-1 and DA-2 dopamine agonists on the isolated guinea-pig atria.
1987
1 The effects of dopamine and both DA-1 and DA-2 dopamine receptor agonists have been studied on the contractile force of electrically driven guinea-pig left atria and frequency of spontaneously beating right atria. 2 Pretreatment of animals with reserpine caused a parallel rightward shift of the concentration-response curve to dopamine of either preparation. 3 Propranolol, but not domperidone, shifted to the right the dose-response curve for the positive inotropic and chronotropic effects of dopamine. 4 Neither apomorphine, fenoldopam, bromocriptine nor piribedil had effects on the frequency and contractile force of the isolated guinea-pig atria. 5 These results suggest that DA-1 and DA-2 …
Cavanilles y las mordeduras de víbora
1996
El presente trabajo pretende recordar, en una visión retrospectiva, el tratamiento de las mordeduras de víbora según los escritos de A. J. Cavanilles, de gran vigencia entre 1793 y 1802. Se citan los polvos vegetales integrantes de la mezcla utilizada para el tratamiento, la recolección de los mismos y la dosis a administrar del preparado al uso de la época, especialmente, en tierras de Els Ports y de La Foia de Castalla.
Two Latent and Two Hyperstable Polymeric Forms of Human Neuroserpin
2010
AbstractHuman neuroserpin (hNS) is a serine protease inhibitor that belongs to the serpin superfamily and is expressed in nervous tissues. The serpin fold is generally characterized by a long exposed loop, termed the reactive center loop, that acts as bait for the target protease. Intramolecular insertion of the reactive center loop into the main serpin β-sheet leads to the serpin latent form. As with other known serpins, hNS pathological mutants have been shown to accumulate as polymers composed of quasi-native protein molecules. Although hNS polymerization has been intensely studied, a general agreement about serpin polymer organization is still lacking. Here we report a biophysical chara…
Mediterranean bioconstructions along the Italian coast
2018
Marine bioconstructions are biodiversity-rich, three-dimensional biogenic structures, regulating key ecological functions of benthic ecosystems worldwide. Tropical coral reefs are outstanding for their beauty, diversity and complexity, but analogous types of bioconstructions are also present in temperate seas. The main bioconstructions in the Mediterranean Sea are represented by coralligenous formations, vermetid reefs, deep-sea cold-water corals, Lithophyllum byssoides trottoirs, coral banks formed by the shallow-water corals Cladocora caespitosa or Astroides calycularis, and sabellariid or serpulid worm reefs. Bioconstructions change the morphological and chemicophysical features of prima…
Propagation of three thymus species by stem cuttings
2006
Many herbs native to the Mediterranean region are grown for ornamental purposes and represent an important segment of the bedding plant industry. Although the majority of Thymus species are used as officinal plants, some of them are also used as ornamental bedding plants to provide aesthetic enhancement of public and private garden beds, porches, patios, balconies. The aim of this research was to study the vegetative propagation of T. capitatus, T. serpyllum and T. vulgaris. To verify the rooting response to exogenous application of auxin, softwood cuttings were either treated with a 500 ppm 1H-indol-3-butyric acid (IBA) solution, or not treated (control). Propagation was performed in an un…
Deoxysarpagine Hydroxylase — A Novel Enzyme Closing a Short Side Pathway of Alkaloid Biosynthesis in Rauvolfia
2002
Microsomal preparations from cell suspension cultures of the Indian plant Rauvolfia serpentina catalyze the hydroxylation of deoxysarpagine under formation of sarpagine. The newly discovered enzyme is dependent on NADPH and oxygen. It can be inhibited by typical cytochrome P450 inhibitors such as cytochrome c, ketoconazole, metyrapone, tetcyclacis and carbon monoxide. The CO-effect is reversible with light (450 nm). The data indicate that deoxysarpagine hydroxylase is a novel cytochrome P450-dependent monooxygenase. A pH optimum of 8.0 and a temperature optimum of 35 degrees C were determined. K(m) values were 25 microM for NADPH and 7.4 microM for deoxysarpagine. Deoxysarpagine hydroxylase…
Alcuni disegni e incisioni di architettura e ornato al tempo dei Serpotta
2017
Gli elaborati presentati - e schedati in questa occasione - sono il risultato di una selezione riferita a disegni e incisioni di architettura e ornato che testimoniano l’ambiente culturale e professionale di Palermo entro cui si svolge anche l’attività dei Serpotta. Molti di questi grafici appartengono al corpus di Giacomo Amato custodito a Palazzo Abatellis. Si tratta di un nucleo di fogli sciolti ma inseriti all’interno dei sei volumi miscellanei composti da Amato e per la cui redazione hanno occasionalmente collaborato i pittori Antonino Grano e Pietro Aquila. Affiancano questa serie grafica il noto volume dei Disegni di vari altari e cappelle … (Roma 1690-1691), con le sue pregiate tavo…