Search results for "onion"
showing 10 items of 41 documents
Doubled haploid production in onion (Allium cepa L.): from gynogenesis to chromosome doubling
2020
Bulb onion (Allium cepa L.) is an allogamous diploid (2n = 16) important for its culinary uses, nutritional value, and medicinal benefits. Despite its economic importance, onion yields and bulb quality are declining, emphasizing the need for new and improved strategies for maintaining and enhancing overall crop quality. Development of inbred lines in onion through traditional breeding is often difficult due to its biennial life cycle, inbreeding depression, and comparatively high heterozygosities. Moreover, genetic research in onion has been hampered by large nuclear genome size. In this regard, gynogenic doubled haploids promise several advantages over inbred lines in support of onion bree…
English Language Policy in Relation to Teachers and Teacher Educators in Latvia: Insights from Activity Systems Analysis
2020
The ambitious objectives of European language policy and the strive for competitiveness have led to an increasing emphasis on foreign language competence at the level of national education systems. Using Spolsky’s onion model of language policy (2004) and Engeström’s Expansive Learning theory (1987, 2008), the study attempts to determine the formative influence of the existing multilayered language policy on the professional development of Latvian educators with the aim to compare the situation for teachers and teacher educators in respect of their English language proficiency.Given the prioritisation of English and strategic differences in foreign language management in relation to teacher…
Kinetic studies on the oxidative stabilization effect of red onion skins anthocyanins extract on parsley ( Petroselinum crispum ) seed oil
2018
Abstract Cold pressed parsley seed oil gained special interest for the development of new functional foods. Similar to other edible oils it needs protection against oxidation. The present study evaluated the protective effects of anthocyanins extracted from outer skins of red onion on parsley seed oil. The natural extract-oil samples and control have been subjected to storage at 45 °C for 10 days. The results of thermal analysis by DSC showed an optimal concentration of anthocyanins of 3 mL/100 g oil. Kinetic studies using the Ozawa-Flynn-Wall and Kissinger-Akahira-Sunose methods were performed on the sample optimally prepared. The results regarding the activation energy indicated improved …
Contribución al estudio de las comunidades vegetales del orden Potentilletalia caulescentis en la Península Ibérica: la alianza Jasionion foliosae
1985
Se ha efectuado un estudio de la alianza Jasionion foliosae (Asplenietea rupestria) en varios sectores corológicos de la Península Ibérica, describiéndose seis asociaciones de las que tres se proponen como nuevas: Antirrhino pulverulenti-Rhamnetum pumili, Sileno horyii-Saxifragetum cuneatae y Antirrhino granitici-Rhamnetum pumili. A study fon the allince Jasionion foliosae (Asplenietea rupestria) is made in several chorological sectors of the Iberian Peninsula. Six associations are described, of which, three of them are propossed as new: Antirrhino pulverulenti-Rhamnetum pumili, Sileno horyii-Saxifragetum cuneatae and Antirrhino granitici-Rhamnetum pumili. mateo@uv.es
Preparation and characterization of bio-organoclays using nonionic surfactant
2015
The present study was aimed at the preparation and characterization of tailor made hybrid materials, whose peculiar hosting capability could be exploited in biotechnological applications. With this purpose, the modification of K10 montmorillonite by intercalation of Tween 20 surfactant, was accomplished. The influence of two internal parameters, namely pH and surfactant/clay ratio, on the surfactant uptake ability by clay was investigated. The adsorption mechanism was elucidated on the basis of complementary kinetic and equilibrium studies and, then, corroborated by the useful information provided by the FT-IR, TGA and XRD characterization. The gathered results allow to draw the conclusion …
Symmetric and asymmetric cryptographic key exchange protocols in the octonion algebra
2019
AbstractWe propose three cryptographic key exchange protocols in the octonion algebra. Using the totient function, defined for integral octonions, we generalize the RSA public-key cryptosystem to the octonion arithmetics. The two proposed symmetric cryptographic key exchange protocols are based on the automorphism and the derivation of the octonion algebra.
Analytical methods for the characterization and determination of nonionic surfactants in cosmetics and environmental matrices
2013
Nonionic synthetic surfactants, constituted of an assortment of classes, are common ingredients of industrial, household and body-care products. Alone or in combination with anionic surfactants, they perform a variety of functions including cleaning action, emulsification, skin conditioning, appearance and consistency modification, solubilization and dispersing agents. By far fatty alcohol ethoxylates (AEs) and alkylphenol ethoxylates (APEs) are more extensively used than any other nonionic surfactant class; however, works appearing in the literature making reference to the analysis of other nonionic surfactant classes have also been collected in this review. The production volume worldwide…
Comparative analysis of radical scavenging and antioxidant activity of phenolic compounds present in everyday use spice plants by means of spectropho…
2010
Comparative analysis of radical scavenging and antioxidant activities of phenolic compounds present in everyday use spice plants was carried out by means of spectrophotometric and chromatographic methods. Six spice plant samples, namely onion (Allium cepa), parsley (Petroselinum crispum) roots and leaves, celery (Apium graveolens) roots and leaves and leaves of dill (Anethum graveolens) were analyzed. Total amount of phenolic compounds and radical scavenging activity (RSA) was the highest in celery leaves and dill extracts and was the lowest in celery roots. Comparing commonly used spectrophotometric analysis of 2,2-diphenyl-1-picrylhydrazyl (DPPH) RSA of extracts with the results obtained …
Il lavoro e l'arte della ricerca: Antonino Buttitta
2018
Si tratta della ricostruzione del profilo intellettuale e scientifico di Antonino Buttitta, tra i capiscuola delle discipline demoetnoantropologiche in Italia, al quale si deve una originale declinazione dell'approccio strutturalista nell'analisi dei fatti culturali nell'ambito della semiotica della cultura.
Recent advances in smart biotechnology: Hydrogels and nanocarriers for tailored bioactive molecules depot
2017
Over the past ten years, the global biopharmaceutical market has remarkably grown, with ten over the top twenty worldwide high performance medical treatment sales being biologics. Thus, biotech R&D (research and development) sector is becoming a key leading branch, with expanding revenues. Biotechnology offers considerable advantages compared to traditional therapeutic approaches, such as reducing side effects, specific treatments, higher patient compliance and therefore more effective treatments leading to lower healthcare costs. Within this sector, smart nanotechnology and colloidal self-assembling systems represent pivotal tools able to modulate the delivery of therapeutics. A comprehens…