Search results for "Pyrus"

Pyrus ciancioi (Rosaceae), a new species from Sicily

2012

A new species of Pyrus L. from the Nebrodi Mountains (NE Sicily) is described, named, and illustrated. It differs from P. spinosa in the shape and diameter/length ratio of its fruits and in the width/length ratio of the leaf lamina. An analytical key to the Pyrus species growing in Sicily is provided.

The ecological role of Pyrus Spinosa Forssk. in the ecosystem recovery and land restoration of Mediterranean woodlands

2021

In the Mediterranean basin, large areas still call for active reforestation, having a very low woody cover, thus resulting less resistant and resilient to climate change and suffering from a higher risk of soil degradation processes. Knowing the effects on soil fertility and carbon sequestration of single woody species can be of great practical importance, although being rarely tested. We aimed to assess the effect of Pyrus spinosa on soil fertility (soil carbon and nitrogen), microbial biomass and carbon sequestration (in aboveground stems) of Mediterranean pasturelands. The research was carried out in Ficuzza Nature Reserve (NW Sicily), where large areas are composed of extensive pasturel…

Note nomenclaturali, tassonomiche e corologiche su Cyperus papyrus L. (Cyperaceae)

2011

Profiling of compounds and degradation products from the postharvest treatment of pears and apples by ultra-high pressure liquid chromatography quadr…

2010

This study deals with a simple strategy to pinpoint potential unknown compounds in full scan mass spectrometry (MS) experiments. Forty samples of apples and pears intended for human consumption were analyzed by ultra-high performance liquid chromatography quadrupole-time-of-flight (UPLC–QqTOF-MS), after extraction of the possible contaminants by rinsing the peel of the fruit with ethyl acetate. The peaks were visually recognized in the total ion chromatogram (TIC). Two major types of postharvest treatments were detected in this set of samples: imazalil (IMZ)/ethoxyquin (EQ) and thiabendazole (TBZ)/diphenylamine (DPA). The present work also describes the metabolites formed by degradation of …

Increased resistance to oxidation of betalain-enriched human low density lipoproteins

2003

Betalains are natural pigments recently considered as compounds with potential antioxidative properties. In this work, ex vivo plasma spiking of pure either betanin or indicaxanthin, followed by isolation of low density lipoprotein (LDL), and measurement of its resistance to copper-induced oxidation, has been used to research if these betalains can bind to LDL and prevent oxidation of LDL lipids. When pooled human plasma from 10 healthy volunteers was incubated in the presence of 25-100 microM either betanin or indicaxanthin, incorporation of both compounds in LDL was observed, with a maximum binding of 0.52 +/- 0.08, and 0.51 +/- 0.06 nmoles of indicaxanthin and betanin, respectively, per …

Mais quelle tête a donc le papyrus ? A propos de l'usage et de la circulation des images naturalistes imprimées au sein de la République des lettres

2008

Il nuovo Artemidoro

2009

Note critiche al papiro di Derveni

2010

Bumbieru-kadiķu rūsas (ier. Gymnosporangium sabinae) ietekme uz dažādu bumbieru Pyrus communis genotipu lapu anatomiju un morfoloģiju

2019

Bumbieru-kadiķu rūsa ir saimnieciski nozīmīga augu slimība, taču maz ir pētīts par tās ierosinātāja Gymnosporangium sabinae un sekundārā saimniekauga bumbieres mijiedarbību. Pētījumu veica APP „Dārzkopības Institūts” laika posmā no 2018. gada jūnijam līdz 2018. gada augustam. Darba mērķis bija izpētīt anatomiskās un morfoloģiskās izmaiņas lapās bumbieru genotipiem ar dažādu Gymnosporangium sabinae ieņēmību visā patogēna attīstības periodā. Darba mērķa sasniegšanai veikta bumbieru-kadiķu rūsas infekcijas attīstības vērtēšana 35 bumbieru genotipiem, no atlasītās genotipu kopas 26 genotipiem veikti lapas ūdens satura, lapas laukuma, lapas laukuma un masas attiecības mērījumi un anatomisko stru…

Otto Neugebauer and the Göttingen Approach to History of the Exact Sciences

2018

Otto Neugebauer (1899–1990) was, for many, an enigmatic personality. Trained as a mathematician in Graz, Munich, and Gottingen, he had not yet completed his doctoral research when in 1924 Harald Bohr, brother of the famous physicist, invited him to Copenhagen to work together on Bohr’s new theory of almost periodic functions. Quite by chance, Bohr asked Neugebauer to write a review of T. Eric Peet’s recently published edition of the Rhind Papyrus (Neugebauer 1925). In the course of doing so, Neugebauer became utterly intrigued by Egyptian methods for calculating fractions as sums of unit fractions (e.g. 3/5 = 1/3 + 1/5 + 1/15). When he returned to Gottingen, he wrote his dissertation on thi…