Search results for "fenol"
showing 10 items of 164 documents
Pupu sēklgrauža (Bruchus rufimanus) bioloģija, ekoloģija un to ietekmējošie faktori lauka pupas (Vicia faba) sējumos
2018
Palielinoties lauka pupas sējas platībām gan Eiropas gan Latvijas teritorijas ietvaros, palielinās arī ar tām saistīto kaitēkļu apdzīvotās vietas. Pupu sēklgrauzis (Bruchus rufimanus Boh.) ir zināms lauka pupas kaitēklis, kura kāpurs barojas ar tās sēklām auga jaunajās pākstīs. Daļa sēklgrauža populācijas pārziemo sēklās sēklu glabātavās. Pētījuma mērķis ir izprast pupu sēklgrauža attīstības bioloģiju un ekoloģiju un to ietekmējošos faktorus. Pētījums veikts septiņos lauka pupas sējumos 2017. gada veģetācijas sezonā. Sēklgrauža ekoloģijas izprašanai veica imago uzskaites lauka pupās, olu uzskaites uz jaunajām pākstīm, pākstu paraugu un sējas materiāla analīzi. Pākstu paraugus analizēja pēc …
Variacions sobre el tema "Corella i els contemporanis valencians"
1998
The author provides data concerning the interrealtion between Corella's work and that of some of hiscontemporaries -precisely Ausiàs March, Joan Moreno and Bernat Fenollar-. He analyses in detail the jovial poem dedicated to Bernat del Bosch - a character here identified as historical, and executed for his homosexuality.
De la sublimitat cortesa a l'efusió llibertina. L'altra cara de la «fin'amor»
2003
Review of satirical and obscene poetry, from the Galician/Portuguese and Provençal traditions to the «Cancionero de obras provocantes a risa» including Baena’s «Cancionero» and the «Cancionero General» by Hernando del Castillo. The author shows there is continuity in the use of these themes that is independent of their treatment and the rhetorical settings.The last pages are dedicated to the «Carajicomedia», the work of an author who is familiar with Valencia and perhaps with the milieu of Fenollar and company.
Ligniinin osuuden vaikutus ligniini-fenoliformaldehydihartsien kemiaan
2017
Fenoliformaldehydihartsia valmistetaan fenolista ja formaldehydistä, joka toimii ristisilloitusagenttina. Katalyyttinä käytetään natriumhydroksidia. Formaldehydi liittyy fenolin renkaaseen hydroksyyliryhmän para- tai orto-asemiin additioreaktiolla alkalisissa olosuhteissa. Fenolin alkalointi saa aikaa renkaaseen karbanioneja, joihin formaldehydin elektrofiilinen hiiliatomi voi liittyä. Reaktio tunnetaan Lederer-Manasse-reaktiona. Ligniini on amorfinen biopolymeeri, jota saadaan esimerkiksi sulfaattiprosessin sivutuotteena. Rakenteellisesti ligniinistä voidaan erottaa kolme fenyylipropaaniyksikköä, jotka ovat p-kumaryylialkoholi, koniferyylialkoholi ja sinapyylialkoholi. Ligniinillä voidaan …
Interazione fra il lisozima estratto da uovo e da alcuni macrocomponenti di mosti e vini
2009
I trucioli in affinamento modificano la componente polifenolica e sensoriale dei vini, ma le differenze non sono sempre apprezzabili. La micro-ossigenazione migliora le caratteristiche cromatiche, anche se comporta una diminuizione di flavani e antociani monomeri. La feccia fine favorisce ulteriormente la stabilità e migliora il profilo sensoriale.
Response to dopamine agonists of the rat isolated uterus.
1993
1. Quinpirole did not produce any effect in isolated uterus from oestrogenized rats even when it is contracted by KCl (37 mM). 2. Fenoldopam produced a relaxant effect on rat isolated uterus contracted by KCl which was not significantly modified by SCH 23390. 3. Reserpine decreased the effect of the lowest doses of fenoldopam. In reserpinized rats, propranolol (10(-9), 10(-8), 10(-7) M) antagonized the effect of the lowest doses of fenoldopam and neither SCH 23390, sulpiride nor ranitidine modified the effect of fenoldopam. 4. The results confirm our previous finding that DA1-receptors are not functional in our preparation. The effect of fenoldopam was partially due to a catecholamine-relea…
Variazioni di miRNA circolanti in casi di carcinoma mammario sottoposti a regime dietetico con oli addizionati di polifenoli
Dal 2002, quando i primi risultati relativi alla possibile associazione tra espressione di alcuni miRNA e cancro furono pubblicati, numerosi studi hanno evidenziato un intervento diretto dei miRNA nella regolazione di geni e di pathways collegati alla sviluppo tumorale. Recentemente si sta sempre più confermando l’evidenza che cambiamenti epigenetici, alterazioni molecolari e componenti bioattivi della dieta possono genericamente modificare l'espressione genica attraverso la modulazione di specifici miRNA. Scopo principale della ricerca è la valutazione dei livelli di espressione di particolari miRNA circolanti nel sangue periferico sia di donne sane che di pazienti affette da carcinoma mam…
Metody izolacji i oznaczania związków fenolowych występujących w miodach
2016
In vitro toxicity assessment and mitigation strategies of beauvericin, sterigmatocystin and patulin / Evaluación de la toxicidad in vitro y estrategi…
2016
Las micotoxinas son contaminantes químicos naturales presentes en los alimentos y piensos que representan un problema preferente económico y de salud pública. El conocimiento de los efectos tóxicos y exposición a las micotoxinas permite caracterizar los riesgos de la población. Se ha evaluado la toxicidad de la beauvericina, esterigmatocistina y patulina de forma individual y combinada mostrando efectos citotóxicos. Se ha observado que todas las micotoxinas produjeron citotoxicidad de manera individual al aumentar la concentración y el tiempo de exposición, siendo las células CHO-K1 más sensibles de mayor a menor potencia a la patulina, beauvericina y esterigmatocistina. Además, se observar…