Search results for " ROS."
showing 10 items of 424 documents
Flowers, Water accumulation and Corporate Social Responsibility: Certification of the Production of Roses and Claims for Environmental Justice in Ecu…
2018
La producción comercial de flores, el acaparamiento del agua y las luchas sociales por un reparto equitativo y un ambiente sano tienen una estrecha relación. Ecuador es el tercer exportador mundial de rosas. Cayambe-Tabacundo es la principal zona de producción y presenta una fuerte presión sobre los recursos hídricos. El agua es acaparada por las grandes empresas florícolas, quedando el resto para agricultura/ganadería de subsistencia en comunidades indígenas. Las florícolas utilizan las certificaciones ambientales y de comercio justo privadas, pero los estándares son permisivos. Este artículo analiza las relaciones de poder detrás de las prácticas de certificación de flores. Concluye que s…
4 – 5 gadīgu bērnu intereses par dabu rosināšana rotaļās dabā
2022
Kvalifikācijas darba tēma ir „4 – 5 gadīgu bērnu intereses par dabu rosināšana rotaļās dabā”. Problēmas aktualitāte: Šī brīža paaudzei ir nepieciešams rast mērenību starp laiku, kas tike pavadīt pie ekrāna un rotaļām dabā. Mijiedarbība ar dabisku vidi ļauj bērniem gūt zināšanas darot un eksperimentējot ar idejām – domāt, apšaubīt un izvirzīt hipotēzes, iejūtoties zinātnieku lomā. Šī bērnu paaudze nekad nav pazinusi dzīvi bez datora vai interneta. Pētījuma mērķis: pētīt un izzināt 4 – 5 gadīgu bērnu intereses pret rotaļām dabā veidošanos. Darba pirmajā nodaļā atspoguļotas intereses būtība dažādu autoru skatījumā, veikts pētāmā vidējā pirmsskolas vecuma bērnu raksturojums, apkopotas dažādu au…
Study of quantitative and qualitative variations in essential oils of Sicilian Rosmarinus officials L.
2015
In this study the chemical characterizations of 10 sicilian biotypes of Rosmarinus officinalis L. essential oils are reported. The main goal was to analyze the relationship between the essential oils yield and the geographical distribution of the species plants. The essential oils were analyzed by GC-FID and GC-MS. The statistical methods Hierarchical Cluster Analysis and Principal Component Analysis were used to cluster biotypes according to the chemical composition of the essential oils. The essential oil yield ranged from 0.8 - 2.3 (v/w). 82 compounds have been identified, these represent 96.7-99.9% of the essential oil. The compounds mostly represented in the essential oils were: 1.8- C…
Ernesto Rossi e La Riforma Sociale (1926-1930). La carriera interrotta di un economista politico
2022
Con questo saggio si intende ricostruire la breve ma intensa fase di collaborazione di Ernesto Rossi con La Riforma Sociale, prestigiosa rivista di economia e scienze sociali fondata da Francesco Saverio Nitti nel 1894 e diretta da Luigi Einaudi dal 1908. Fra il 1926 e il 1930 Rossi è autore di sette lunghi saggi su tematiche di finanza pubblica, economia applicata e statistica economica che sono stati relativamente trascurati dalla storiografia. La rilettura di questi contributi consente di approfondire alcuni momenti centrali nella sua formazione di economista. In particolare: l’influenza di Einaudi e di De Viti de Marco; la predilezione per un approccio empirico all’analisi economica; la…
EFFECT OF EXTRACTS FROM LEAVES AND RHIZOMES OF THE SEAGRASS POSIDONIA OCEANICA ON HEPG2 HEPATOCARCINOMA (HCC) CELLS
2022
Parthenolide induces caspase-independent and AIF-mediated cell death in human osteosarcoma and melanoma cells
2013
The mechanism of the cytotoxic effect exerted by parthenolide on tumor cells is not clearly defined today. This article shows that parthenolide stimulates in human osteosarcoma MG63 and melanoma SK-MEL-28 cells a mechanism of cell death, which is not prevented by z-VAD-fmk and other caspase inhibitors. In particular treatment with parthenolide rapidly stimulated (1-2 h) reactive oxygen species (ROS) generation by inducing activation of extracellular signal-regulated kinase 1/2 (ERK 1/2) and NADPH oxidase. This event caused depletion of thiol groups and glutathione, NF-κB inhibition, c-Jun N-terminal kinase (JNK) activation, cell detachment from the matrix, and cellular shrinkage. The increa…
Zinc accelerates respiratory burst termination in human PMN
2021
The respiratory burst of phagocytes is essential for human survival. Innate immune defence against pathogens relies strongly on reactive oxygen species (ROS) production by the NADPH oxidase (NOX2). ROS kill pathogens while the translocation of electrons across the plasma membrane via NOX2 depolarizes the cell. Simultaneously, protons are released into the cytosol. Here, we compare freshly isolated human polymorphonuclear leukocytes (PMN) to the granulocytes-like cell line PLB 985. We are recording ROS production while inhibiting the charge compensating and pH regulating voltage-gated proton channel (HV1). The data suggests that human PMN and the PLB 985 generate ROS via a general mechanism,…
A Genomic, Transcriptomic and Proteomic Look at the GE2270 Producer Planobispora rosea, an Uncommon Actinomycete.
2015
We report the genome sequence of Planobispora rosea ATCC 53733, a mycelium-forming soil-dweller belonging to one of the lesser studied genera of Actinobacteria and producing the thiopeptide GE2270. The P. rosea genome presents considerable convergence in gene organization and function with other members in the family Streptosporangiaceae, with a significant number (44%) of shared orthologs. Patterns of gene expression in P. rosea cultures during exponential and stationary phase have been analyzed using whole transcriptome shotgun sequencing and by proteome analysis. Among the differentially abundant proteins, those involved in protein metabolism are particularly represented, including the G…
Analisi molecolare in popolazioni di Prunus mahaleb s.l. (Rosaceae) della Sicilia
2010
Zvaigžņotā Debess: 2011/12, Ziema (214)
2011
Saturs: Gamma staru astronomijas problēmas ; Apollo-14 Mēness ekspedīcija ; A.Laure. Protoplanetāro miglāju stadija zvaigžņu evolūcijā ; A.A. Jaunumi īsumā: Oglekļa zvaigzne un rentgenstaru avots ; A.Alksnis. Heršels ielūkojas Miras galvā ; D.Docenko. Jauns dziļš debess apskats WiggleZ ir pabeigts: gaidām rezultātus ; A.A. Jaunumi īsumā: Pundurplanēta Erīda ir precīzi izmērīta. Atvērto durvju dienā Garhingā... ; M.Gertāns. Iepazīstot Kenedija kosmosa centru un atvadoties no Space Shuttle ; J.Dambītis. Ievērojams Latvijas matemātiķis – docents Nikolajs Brāzma (1913-1966) ; J.Jansons. Fiziķu centieni 1950.-1960. gados atgriezt fundamentālo zinātni Universitātē ; V.Fļorovs, A.Cēbers, D.Bočarov…