1,342 research outputs found
Ultra-High-Resolution Liquid Chromatography Coupled with Electrospray Ionization Quadrupole Time-of-Flight Mass Spectrometry Analysis of Tessaria absinthioides (Hook. & Arn.) DC. (Asteraceae) and Antioxidant and Hypocholesterolemic Properties
No full textRecently, we reported the chemical profile and the hypocholesterolemic effects of a decoction of Tessaria absinthioides (Hook. & Arn.) DC. (Asteraceae). In this study, we evaluated a methanolic extract (METa) instead. Metabolite profiling was conducted using ultra-high-resolution liquid chromatography coupled with electrospray ionization quadrupole time-of-flight mass spectrometry (UHPLC-ESI-QTOF-MS), identifying thirty compounds, including flavonoids, phenolic acids, fatty acids, and phorbolesters. Antioxidant properties were assessed through 2,2-diphenyl-1-picrylhydrazyl (DPPH), Trolox equivalent antioxidant activity (TEAC), ferric-reducing antioxidant power (FRAP), and inhibition of lipid peroxidation in erythrocytes (ILP) assays, exhibiting robust antioxidant activity. The in vivo impact of METa on serum lipid parameters and liver X receptors (LXRs) was evaluated in a hypercholesterolemic animal model. After 14 days on a high-fat diet, male rats received either a vehicle (V) or METa100, METa200 or METa500 (100; 200 and 500 mg METa/kg animal, respectively) for an additional two weeks. METa500 reduced total cholesterol levels (17.62%; p < 0.05) and all doses increased high-density lipoprotein cholesterol levels (METa100: 86.27%; METa200: 48.37%, and METa500: 29.42%; p < 0.0001). However, METa did not alter LXRs expression. The observed antioxidant and hypocholesterolemic properties of METa may be linked to the presence of six di-caffeoylquinic acids. These findings underscore T. absinthioides as a potential candidate for the treatment of metabolic disease.Fil: Rey, Mariana. Consejo Nacional de Investigaciones Científicas y Técnicas. Instituto de Biología y Medicina Experimental. Fundación de Instituto de Biología y Medicina Experimental. Instituto de Biología y Medicina Experimental; ArgentinaFil: Kruse, Maria Sol. Consejo Nacional de Investigaciones Científicas y Técnicas. Instituto de Biología y Medicina Experimental. Fundación de Instituto de Biología y Medicina Experimental. Instituto de Biología y Medicina Experimental; ArgentinaFil: Gómez, Jessica. Universidad Nacional de San Juan. Facultad de Filosofía, Humanidades y Artes. Instituto de Ciencias Básicas; ArgentinaFil: Simirgiotis, Mario J.. Universidad Austral de Chile; ChileFil: Tapia, Alejandro. Universidad Nacional de San Juan. Facultad de Filosofía, Humanidades y Artes. Instituto de Ciencias Básicas; ArgentinaFil: Coirini, Hector. Consejo Nacional de Investigaciones Científicas y Técnicas. Instituto de Biología y Medicina Experimental. Fundación de Instituto de Biología y Medicina Experimental. Instituto de Biología y Medicina Experimental; Argentin
Reconfiguration of a value function-based guidance system
No full textThesis (S.M.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 2003.Includes bibliographical references (leaves 109-111).This electronic version was submitted by the student author. The certified thesis is available in the Institute Archives and Special Collections.by Mario J. Valenti.S.M
Antioxidant Capacity and HPLC-DAD-MS Profiling of Chilean Peumo (Cryptocarya alba) Fruits and Comparison with German Peumo (Crataegus monogyna) from Southern Chile
No full textLiquid chromatography (LC) coupled with UV detection and electrospray ionization (ESI) tandem mass spectrometry (MS/MS) was used for the generation of chemical fingerprints and the identification of phenolic compounds in peumo fruits and aerial parts from southern Chile. Thirty three compounds (19 of these detected in C. alba and 23 in C. monogyna) were identified, mainly flavonoid glycosides, phenolic acids, anthocyanins and flavonoid aglycons. Total phenolic content and total flavonoid content was measured for both species, and were higher in the extracts from C. monogyna fruits and aerial parts than extracts from C. alba. The fruits of Cryptocarya alba (Chilean peumo) presented high antioxidant capacity (9.12 ± 0.01 mg/mL in the DPPH assay), but was three times lower to that of Crataegus monogyna (German peumo) (3.61 ± 0.01 mg/mL in the DPPH assay)
El Tlacuache Núm. 456 (2011). 456 Año 11 (2011) febrero. El Tlacuache
No full textLos guardianes de Chalcatzingo: sus trabajadores por Mario Córdova Tello, Carolina Meza Rodríguez, J. Cuauhtli Medina Romero. -Ética de la arqueología morelense por Raúl Francisco González Quezada
Propolis from the Monte Region in Argentina: A Potential Phytotherapic and Food Functional Ingredient
No full textThe aim of this review is to provide overall information on Argentine propolis and to shed light on its potential, especially the one from the Monte region so as to support future research in the field. Around 1999, the Argentine propolis began to be chemically and functionally characterized to give it greater added value. Because Argentina has a wide plant biodiversity, it is expected that its propolis will have various botanical origins, and consequently, a different chemical composition. To date, five types have been defined. Based on their functionality, several products have been developed for use in human and veterinary medicine and in animal and human food. Because the Argentine propolis with the greatest potential is that of the Monte eco-region, this review will describe the findings of the last 20 years on this propolis, its botanical source (Zuccagnia punctata Cav.), its chemical composition, and a description of markers of chemical quality (chalcones) and functionality. Propolis can regulate the activity of various pro-inflammatory enzymes and carbohydrate and lipid metabolism enzymes, as well as remove reactive oxygen and nitrogen species. Consequently, it can modulate metabolic syndrome and could be used as a functional ingredient in food. Furthermore, hydroalcoholic extracts can act against human and animal pathogenic bacteria and human yeast, and mycelial pathogenic fungi. The ability to stop the growth of post-harvest pathogenic bacteria and fungi was also demonstrated. For this reason, Argentine propolis are natural products capable of protecting crops and increasing the lifespan of harvested fruit and vegetables. Several reports indicate the potential of Argentine propolis to be used in innovative products to improve health, food preservation, and packaging. However, there is still much to learn about these natural products to make a wholesome use of them.EEA FamailláFil: Zampini, Iris Catiana. Consejo Nacional de Investigaciones Científicas y Técnicas. Instituto de Bioprospección y Fisiología Vegetal; ArgentinaFil: Zampini, Iris Catiana. Universidad Nacional de Tucumán. Instituto de Bioprospección y Fisiología Vegetal; ArgentinaFil: Zampini, Iris Catiana. Universidad Nacional de Tucumán. Facultad de Ciencias Naturales; Argentina.Fil: Salas, Ana Lilia. Consejo Nacional de Investigaciones Científicas y Técnicas. Instituto de Bioprospección y Fisiología Vegetal; ArgentinaFil: Salas, Ana Lilia. Universidad Nacional de Tucumán. Instituto de Bioprospección y Fisiología Vegetal; ArgentinaFil: Salas, Ana Lilia. Universidad Nacional de Tucumán. Facultad de Ciencias Naturales; ArgentinaFil: Maldonado, Luis Maria. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Famaillá; ArgentinaFil: Simirgiotis, Mario J. Universidad Austral de Chile. Facultad de Ciencias. Instituto de Farmacia; ChileFil: Isla, María Inés. Consejo Nacional de Investigaciones Científicas y Técnicas. Instituto de Bioprospección y Fisiología Vegetal; ArgentinaFil: Isla, María Inés. Universidad Nacional de Tucumán. Instituto de Bioprospección y Fisiología Vegetal; ArgentinaFil: Isla, María Inés. Universidad Nacional de Tucumán. Facultad de Ciencias Naturales; Argentina
Measurement of the ratio of prompt χ c to J / ψ production in pp collisions at √s = 7 TeV
No full textThe prompt production of charmonium χ c and J / ψ states is studied in proton-proton collisions at a centre-of-mass energy of √s = 7 TeV at the Large Hadron Collider. The χ c and J / ψ mesons are identified through their decays χ c → J / ψ γ and J / ψ → μ + μ - using 36 pb - 1 of data collected by the LHCb detector in 2010. The ratio of the prompt production cross-sections for χ c and J / ψ, σ (χ c → J / ψ γ) / σ (J / ψ), is determined as a function of the J / ψ transverse momentum in the range 2 < p T J / ψ < 15 GeV / c. The results are in excellent agreement with next-to-leading order non-relativistic expectations and show a significant discrepancy compared with the colour singlet model prediction at leading order, especially in the low p T J / ψ region
Gruppi con pochi sottogruppi non quasinormali
No full textLet be a group. A subgroup of is said to be quasinormal if for every subgroup of , and is called quasi-Hamiltonian if all its subgroups are quasinormal. The structure of quasi-Hamiltonian groups has been described by {\it K. Iwasawa} [in J. Fac. Sci., Univ. Tokyo, Sect. I 4, 171-199 (1941; Zbl 0061.025) and Jap. J. Math. 18, 709-728 (1943; Zbl 0061.025)]. If is a group, let denote the subgroup generated by all subgroups of which are not quasinormal. Then is quasi-Hamiltonian if and only if , and it is easy to show that is generated by all cyclic non-quasinormal subgroups of .\par The author studies the class of all groups for which is a proper subgroup. The corresponding problem for the subgroup generated by all non-normal subgroups was considered by {\it D. Cappitt} [J. Algebra 17, 310-316 (1971; Zbl 0232.20067)]. Clearly every -group is generated by cyclic quasinormal subgroups, and in particular it is locally nilpotent. The author proves that non-periodic -groups are quasi-Hamiltonian. The investigation of periodic -groups can be reduced to the case of a -group ( prime), and the description of -groups in the class is obtained. In particular, it is shown that a -group of infinite exponent is in the class if and only if the subgroup generated by all non-normal subgroups of is properly contained in . Finally, the author proves that if is an -group whose Sylow 2-subgroup is quasi-Hamiltonian, then is metabelian.
[F.de Giovanni (Napoli)
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The Spaghetti Tree: Mario and Franco and the Trattoria Revolution
No full textThe Spaghetti Tree, charts how Britain’s gastronomic revival was largely shaped and coloured by the extraordinary influence of two Italian men. Mario Cassandro and Franco Lagattolla opened their famed La Trattoria Terrazza in London’s Soho in 1959. It was to be the start of a restaurant revolution which was to change the way we eat out now.
Before La Terrazza, most British restaurants were extravagant French affairs or rigidly formal hotel dining rooms: gentlemen wore suits, ladies hats and gloves. The only real alternatives were cheap and cheerful milk bars or a Lyons’ Corner House café. La Terrazza was a revelation: here was a place you could go to eat authentic Italian food in relaxed surroundings. By the early 1960s, the legendary designer Enzo Apicella had given the restaurant a modern look – what became known up and down the country as “Trattoria Style” - tiled floors, white plaster walls and atmospheric down-lighting over the tables. Nothing like it had been seen before and La Terrazza became the most famous and influential restaurant in London. This was the apogee of Sixties’ glamour and if you weren’t seen dining at La Terrazza you weren’t part of the scene. Where else could you be rubbing shoulders with Brigitte Bardot and Gregory Peck or watching David Bailey and Jean Shrimpton? Spaghetti Tree author, Alasdair Scott Sutherland, brings it all alive as he was there, and came to know all the main characters personally.
However, unlike today, this was the era of congenial hosts fronting restaurants, rather than celebrity chefs creating in the kitchen. Everyone wanted to be known by Mario and Franco. The Spaghetti Tree shows how their engaging partnership along with their incredible vision and hard work resulted in one of the most successful restaurant empires of the last few decades, an empire which affected the way Britain eats out today. It’s hard not to be swept along as you read of Mario’s passion and verve and Franco’s dedicated perfectionism, or feel the excitement as we share their successes and failures and meet their staff, their partners and adversaries.
Before Mario and Franco, the food found in British Italian restaurants was limited and could more accurately be described as ‘Mock-Italian’ – an eclectic combination perhaps of pasta with French dishes given Italian names – Pollo Principessa at the old Leoni’s Quo Vadis was in fact a French dish, Poulet à la Princesse. But when La Terrazza opened its doors in 1959 to serve its first 35 customers, Mario and Franco focused on what they knew best - traditional food from Southern Italy - boosting their own Neapolitan roots with two excellent chefs from the region.
Through the 1960s many of Mario and Franco’s former employees left to open their own places – taking with them Mario and Franco’s menu, their recipes, their style, their staff, their designer – and even their customers. Dozens of similarly styled trattorie eventually spilled outside London. As the “godfather of modern British cooking,” Alastair Little, comments in the book ‘The Trattoria Revolution was the biggest leap forward in Britain’s culinary development since Escoffier’.
Even today, fifty years later, as the author discovered when he visited the kitchens of Giorgio Locatelli’s Michelin-starred Locanda Locatelli, Mario and Franco’s legacy lives on.
The Spaghetti Tree is a deeply evocative piece of social and food history which maps out the Italian invasion of Britain’s food and restaurant culture. With its cast of flamboyant characters spliced with high drama and an ear for the mood of the times, this is a missing piece of the social jigsaw that was London in the sixties.
Read it - and you’ll never again twirl spaghetti on your fork without thinking of Mario and Franco
El Tlacuache Núm. 455 (2011). 455 Año 11 (2011) febrero. El Tlacuache
No full textLos guardianes de Chalcatzingo: sus trabajadores por Mario Córdova Tello, Carolina Meza Rodríguez, J. Cuauhtli Medina Romero. -Ética de la arqueología morelense por Raúl Francisco González Quezada
UHPLC-HESI-OT-MS-MS biomolecules profiling, antioxidant and antibacterial activity of the “orange-yellow resin” from zuccagnia punctata Cav
No full textThis research was designed to investigate the metabolite profiling, phenolics, and flavonoids content as well as the potential antioxidant and antibacterial, properties of orange-yellow resin from Zuccagnia punctata Cav (ZpRe). Metabolite profiling was obtained by a ultrahigh resolution liquid chromatography orbitrap MS analysis (UHPLC-ESI-OT-MS-MS). The antioxidant properties were screened by four methods: 2,2-diphenyl-1-picrylhydrazyl assay (DPPH), trolox equivalent antioxidant activity assay (TEAC), ferric-reducing antioxidant power assay (FRAP), and lipid peroxidation in erythrocytes (LP)). The antibacterial activity was evaluated according to the Clinical and Laboratory Standards Institute (CLSI) rules. The resin displayed a strong DPPH scavenging activity (IC50 = 25.72 µg/mL) and showed a percentage of inhibition of LP close to that of the reference compound catechin (70% at 100 µg ZpRe/mL), while a moderated effect was observed in the FRAP and TEAC assays. The resin showed a content of phenolic and flavonoid compounds of 391 mg GAE/g and 313 mg EQ/g respectively. Fifty phenolics compounds were identified by ultrahigh resolution liquid chromatography orbitrap MS analysis (UHPLC-PDA-OT-MS) analysis. Thirty-one compounds are reported for the first time, updating the knowledge on the chemical profile of this species. The importance of the biomolecules identified support traditional use of this endemic plant. Furthermore, additional pharmacological data is presented that increase the potential interest of this plant for industrial sustainable applications.Fil: Gómez Pelaytay, Jessica Belén. Universidad Nacional de San Juan. Facultad de Ingeniería. Instituto de Biotecnología; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - San Juan; ArgentinaFil: Simirgiotis, Mario Juan. Universidad Austral de Chile; Chile. Consejo Nacional de Investigaciones Científicas y Técnicas; ArgentinaFil: Manrique, Sofia. Universidad Nacional de San Juan. Facultad de Ingeniería. Instituto de Biotecnología; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - San Juan; ArgentinaFil: Lima, Beatriz Viviana. Universidad Nacional de San Juan. Facultad de Ingeniería. Instituto de Biotecnología; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - San Juan; ArgentinaFil: Bórquez, Jorge. Universidad de Antofagasta; ChileFil: Feresin, Gabriela Egly. Universidad Nacional de San Juan. Facultad de Ingeniería. Instituto de Biotecnología; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - San Juan; ArgentinaFil: Tapia, Aníbal Alejandro. Universidad Nacional de San Juan. Facultad de Ingeniería. Instituto de Biotecnología; Argentin
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