Search results for "ASTER"
showing 10 items of 2223 documents
UDP-glucosyltransferase activity toward exogenous substrates in Drosophila melanogaster.
1991
To investigate the capacity of Drosophila extracts to glucosylate exogenous substrates we have developed a fast and sensitive method for the detection of UDP-glucosyltransferase activity using 4-nitrophenol, 1-naphthol, or 2-naphthol as substrates. High-performance liquid chromatography was used to separate and quantitate the reaction products, allowing detection of activities that produced as little as 1 pmol of 2-naphthol glucoside (fluorescence detection) or 16 pmol of 4-nitrophenol glucoside (absorbance detection). Optimal activity was found at 43 degrees C and alkaline pH. The affinity of the Drosophila enzyme was 250-fold higher for 1-naphthol or 2-naphthol (Km approximately 4 microM)…
Association of Birth Weight With Type 2 Diabetes and Glycemic Traits: A Mendelian Randomization Study.
2019
Key Points Question Is birth weight associated with type 2 diabetes and glycemic traits? Findings This mendelian randomization study found that a 1-SD decrease in birth weight due to the genetic risk score was associated with a higher risk of type 2 diabetes among European and East Asian populations. In addition, a 1-SD decrease in birth weight was associated with a 0.189-SD increase in fasting glucose concentration, but not with fasting insulin, 2-hour glucose, or hemoglobin A1c level. Meaning A genetic predisposition to lower birth weight was associated with an increased risk of type 2 diabetes and increased fasting glucose, suggesting potential mechanisms through which perturbation of th…
P1475Impact of automatic screening and parasternal rights positions in the eligibility of patients with hypertrophic cardiomyopathy for subcutaneous …
2020
Abstract Background A high percentage of failures in the detection of QRS and T wave in patients (pts) with hypertrophic cardiomyopathy (HCM) have been reported. This finding would prevent them from being eligible for an implantable subcutaneous automatic defibrillator (S-ICD). However, recently 2 changes in the detection have been proposed, automatic screening and the use of right parasternal position of the lead. The aim of our work was to study if the elegibility proportion of patients was increased with both 2 advacements. Methods We included 31 patients (18 male)with a diagnosis of HCM and at least 1 risk factor for sudden death, in follow-up at the outdoor clinic of of 2 cardiology …
Synthesis of chiral 1,5-disubstituted pyrrolidinones via electrophile-induced cyclization of 2-(3-butenyl)oxazolines derived from (1R,2S)- and (1S,2R…
2006
Starting from (1R,2S)- and (1S,2R)-norephedrine, enantiomers of the corresponding 2-(3-butenyl)oxazolines were prepared in a two-step process. The cyclization of the intermediate alkenylamides with phenylselenyl bromide afforded cyclic imidates instead of the expected pyrrolidinones. The electrophile-induced cyclizations of 2-alkenyloxazolines with bromine or iodine produced diastereomeric mixtures of chiral 1,5-disubstituted pyrrolidinones. The ring closure of the all-cis (1R,2S,5R)-diastereomer 7 with NaH resulted in the tetrahydropyrrolo[2,1-b]oxazol-5-one derivative 18, which was alternatively prepared by the cyclocondensation of (1R,2S)-norephedrine with levulinic acid.
Ikonoklazm – spór religijny czy polityczny? Leona III idea obrony czystości wiary i uniformizacji państwa
2017
W historii kultu obrazów oraz jego właściwego pojmowania zrodził się w starożytności ruch, który – zgodnie z tradycją starotestamentową – sprzeciwiał się takiej formie pobożności. Reformy ikonoklastyczne, zapoczątkowane przez kalifa Jazyda II, zyskiwały coraz szersze poparcie w kręgach chrześcijańskich, szczególnie wśród monofiytów. Autor wskazuje nie tylko na aspekty teologiczne sporu o obrazy w VIII w., ale także naświetla problem jego politycznego wykorzystania przez cesarza Leona III, dążącego (po częściowym odzyskaniu ziem Bizancjum spod panowania islamskiego) do uniformizacji państwa i chrześcijaństwa. Po naszkicowaniu ogólnej sytuacji politycznej, autor przedstawia zarzuty, jakie cec…
Competitive interactions are mediated in a sex-specific manner by arbuscular mycorrhiza inAntennaria dioica
2017
Plants usually interact with other plants, and the outcome of such interaction ranges from facilitation to competition depending on the identity of the plants, including their sexual expression. Arbuscular mycorrhizal (AM) fungi have been shown to modify competitive interactions in plants. However, few studies have evaluated how AM fungi influence plant intraspecific and interspecific interactions in dioecious species. The competitive abilities of female and male plants of Antennaria dioica were examined in a greenhouse experiment. Females and males were grown in the following competitive settings: (i) without competition, (ii) with intrasexual competition, (iii) with intersexual competitio…
Sintētiska pieeja enantiotīro ciklisko sulfinamīdu sintēzei
2021
Sintētiska pieeja enantiotīro ciklisko sulfinamīdu iegūšanai. Jeršovs G. Zinātniskie vadītāji: Dr. chem. Sūna E., Mg.chem. Kazak M. Maģistra darbs, 92 lappuses, 40 attēli, 4 tabulas, 71 literatūras avots. Latviešu valodā. Maģistra darba ietvaros ir izstrādātas jaunas sintētiskās metodes SN2 un SN2’ tipa iekšmolekulārai sulfinamīdu S-alkilēšanai. Ir izveidots substrātu klāsts SN2’ tipa S-ciklizācijai un piedāvāts tās augstas diastereoselektevitātes skaidrojums. Literatūras apskatā apkopota informācija par sulfinamīdu iekšmolekulārām ciklizācijām un enantiotīro S (VI) atvasinājumu sintēzi no sulfinamīdiem.
Non-radial pulsations in be stars. Preparation of the corot space mission
2006
The general objective of the present work is to contribute to the knowledge of the physics of Be Stars. In particular, we are interested in studying and characterizing their pulsational properties. A very suitable tool to reach this goal is the study and analysis of photometric time series with the maximum time baseline, density and photometric accuracy.The space mission COROT scheduled to be launched in December 2006, will provide ultra high precision, relative stellar photometry for very long continuous observing runs. Up to ten stars will be observed in the seismology fields with a photometric accuracy of a few 10-4 and color information during 150 days.The observations of Be stars with …
Hieracium terraccianoi (Asteraceae), a new species endemic to the Pollino National Park (Southern Italy)
2014
Gristina, Emilio Di, Gottschlich, Günter, Raimondo, Francesco M. (2014): Hieracium terraccianoi (Asteraceae), a new species endemic to the Pollino National Park (Southern Italy). Phytotaxa 188 (1): 55-60, DOI: 10.11646/phytotaxa.188.1.8, URL: http://dx.doi.org/10.11646/phytotaxa.188.1.8
La Gipsoteca del Dipartimento Culture e Società e il valore didattico delle raccolte di calchi in gesso di scultura antica
2020
The recent opening of the Plaster Cast Collection of the Department Cultures and Societies at the University of Palermo, after a long recovery and restoration work, is the starting point for some considerations about today’s possibilities of use of the academic plaster cast galleries of ancient sculpture. These collections, since their origin devoted to serve as a help for teaching the history of ancient art, and above all the Greek sculpture, are still worthy of interest. First of all they attest an important moment of the scientific history of the subject. But they can be also useful for the present study of ancient art, on condition that we are always aware of the functional and decontex…