Search results for "SAP"
showing 10 items of 1142 documents
Structural, Thermoanalytical and Molecular Modeling Studies on N-(3-hydroxypropyl) 3a,12a-Dihydroxy-5b-cholan-24-amide and Its Monohydrates
2007
The synthetic method for preparing N-(3-hydroxypropyl) 3 alpha,12 alpha-dihydroxy-5 beta-cholan-24-amide can lead to formation of at least three different crystal forms - an anhydrous compound and two monohydrates. The structural and thermal properties of these forms have been characterized by 13C-CP/MAS-NMR and IR spectroscopy, thermo- gravimetry, differential scanning calorimetry and by powder and single crystal x-ray crystallography. In addition, theoretical 13C-NMR chemical shift calculations were also performed for the anhydrous compound and for the first monohydrate, starting from single crystal structures and the structures of these species have now been verified. The first monohydra…
Scrittura come vendetta. Gli Inferni di Anton Francesco Doni fra realismo allegorico e sintassi manierista
2022
Esito della contaminazione del modello dantesco con innumerevoli altre fonti - dalla letteratura odeporica a quella utopica, dalla prosa religiosa alla poesia burlesca – gli Inferni (1553) di Anton Francesco Doni rappresentano un’opera irriducibile ad un genere predefinito, aperta al gioco intertestuale e all’interazione fra testo e immagini. In una prosa eccentrica e originale, frutto della sua sensibilità manieristica, lo scrittore cinquecentesco ci consegna infatti una potente allegoria della condizione umana, uno specchio rovesciato del mondo come la luna ariostesca, brandendo la penna come una spada per smascherare – tra moralità e ironia – le menzogne della società del tempo.
New Biologically Active Triterpene-Saponins fromRandia dumetorum
1990
Two new triterpene-saponins, 3-O-[O-beta-D-glucopyranosyl-(1----4)-O-beta-D-glucopyranosyl-(1----3)-( beta- D-glucuronopyranosyl)]oleanolic acid (1), 3-O-[O-beta-D-glucopyranosyl-(1----6)-O-beta-D-glucopyranosyl- (1----3)-(beta-D-glucuronopyranosyl)]oleanolic acid (2) together with five known saponins (3-7) were isolated from the methanolic extract of the fruits of Randia dumetorum (Retz) Lam. (Rubiaceae). Their structures were established on the basis of chemical and spectral data. The compounds 1, 3, 4, 5 were found to enhance significantly the proliferation of human lymphocytes in vitro. The crude saponin fraction showed haemolytic, molluscicidal, and immunostimulating activities.
Monochamus spp. un citu skujkoku saproksilo vaboļu (Coleoptera) sugu sabiedrības un to ievākšanas metodikas efektivitātes novērtējums kaitīgo organis…
2018
Kopš 1999. gadā Portugālē ieviesās priežu koksnes nematode Bursaphelenchus xylophilus, Eiropā Monochamus ģints koskngraužu nozīmība kā meža kaitēkļiem ievērojami pieauga, jo tie ir šīs nematodes galvenie vektori. B. xylophilus izraisa priežu vīti, kuras dēļ iet bojā liels koku daudzums. Latvijā nav pētīta Monochamus ģints sastopamība un feromonu lamatu efektivitāte, kas ir svarīga informācija, ja nākotnē būs vajadzība kontrolēt B. xylophilus riska zonās – teritorijās, kurās ir augstāka varbūtība kaitīgā organisma ieviešanās riskam. Darba mērķis ir noskaidrot Monochamus ģints koksngraužu sastopamību Latvijā riska zonu vietās un feromonu lamatu efektivitāti skujkoku saproksilo vaboļu ķeršanai…
Potential of the EPA/DHA 6/1 formulation to prevent endothelial dysfunction and cardiopulmonary remodeling in pulmonary arterial hypertension in rats
2016
Pulmonary arterial hypertension (PAH) is characterized by remodeling of the small pulmonary arteries leading to a progressive increase in pulmonary vascular resistance and right ventricular failure. Pulmonary endothelial dysfunction, inflammation and oxidative stress promote the development of pulmonary hypertension. Omega-3 polyunsaturated fatty acids such as eicosapentaenoic acid (EPA) and docosahexaenoic acids (DHA) have been shown to protect the cardiovascular system and reduce inflammation and oxidative stress. The present study evaluate the potential of EPA:DHA 6:1 to prevent monocrotaline-induced PAH in rats. EPA:DHA 6:1 treatment (500 mg/kg/d, p.o) prevented the MCT-induced mean pul…
Morphological and chemical evolution of corundum (ruby and sapphire): Crystal ontogeny reconstructed by EMPA, LA-ICP-MS, and Cr3+Raman mapping
2016
The term “ ontogeny ,” which is commonly used in biology, was introduced into the Earth sciences in 1961 to include the genesis and evolution of single crystals and crystal aggregates. The term encompasses nucleation , growth , alteration , and destruction . We present results of studies concerning the ontogeny of natural corundum (rubies and sapphires), and the chemical and morphological evolution of corundum crystals from deposits in Africa (Kenya, Tanzania, Madagascar) and Southeast Asia (Vietnam). Trace-element compositions indicative for different corundum habits were determined by rim-to-rim LA-ICP-MS and electron microprobe analyses. Raman spectroscopy was applied for Cr 3+ photolumi…
Morphology of ZnO grown by MOCVD on sapphire substrates
2004
A quantitative roughness and microstructural analysis of ZnO grown on sapphire by atmospheric metalorganic chemical vapor deposition (MOCVD) is presented. In order to investigate the influence of the substrate on the morphology, different sapphire orientations have been employed. Scanning force microscopy data have been analyzed for a variety of thicknesses to elucidate, if possible, the growth mechanisms involved in the growth process. Our study reveals significant differences between morphologies depending on whether the substrate surface exhibits steps (misoriented a-, c- and r-planes) or not (m-plane); however, no major differences on the calculated roughness coefficients have been foun…
Tikumu mācība: mācība par vērtībām
1927
Contributor other: Apkalns, Pēteris ( tulkotājs)
Multivariate and Multiscale Complexity of Long-Range Correlated Cardiovascular and Respiratory Variability Series
2020
Assessing the dynamical complexity of biological time series represents an important topic with potential applications ranging from the characterization of physiological states and pathological conditions to the calculation of diagnostic parameters. In particular, cardiovascular time series exhibit a variability produced by different physiological control mechanisms coupled with each other, which take into account several variables and operate across multiple time scales that result in the coexistence of short term dynamics and long-range correlations. The most widely employed technique to evaluate the dynamical complexity of a time series at different time scales, the so-called multiscale …
Vector Autoregressive Fractionally Integrated Models to Assess Multiscale Complexity in Cardiovascular and Respiratory Time Series
2020
Cardiovascular variability is the result of the activity of several physiological control mechanisms, which involve different variables and operate across multiple time scales encompassing short term dynamics and long range correlations. This study presents a new approach to assess the multiscale complexity of multivariate time series, based on linear parametric models incorporating autoregressive coefficients and fractional integration. The approach extends to the multivariate case recent works introducing a linear parametric representation of multiscale entropy, and is exploited to assess the complexity of cardiovascular and respiratory time series in healthy subjects studied during postu…