Search results for "NILL"

Remarks on the type material of Linaria cavanillesii Chav. (Antirrhineae, Veronicaceae)

2013

ABSTRACT Some aspects concerning the type material of Linaria cavanillesii Chav. (Antirrhineae, Veronicaceae), which are conserved in different herbaria, are discussed. This name had previously been lectotypified on Tournefort's collections that are kept at the herbarium P, though they had been regarded erroneously as syntypes. Evidence is shown on the existence of a duplicate of the lectotype (isolectotype), which is conserved among the Salvador herbarium at BC (Institut Botanic de Barcelona), as well as of syntypes deposited in MA on which the illustration by Cavanilles cited in the protologue was drawn. Historical data are reported on collection sites and dates for all cited syntypes of …

Sorption behavior of volatile phenols at the oak wood/wine interface in a model system.

2006

The sorption in a model system of aroma compounds of enological interest (mixture of the eight derivatives from guaiacol, 4-ethylphenol, and whiskylactone) onto wood was investigated to assess the influence of wood on the concentration of these volatiles during the aging of wine. To evaluate the influence of the solubility of aroma compounds in sorption phenomena, this parameter was determined for each volatile compound in model wine at 10 and 25 degrees C. The solubility is significantly higher in the model wine than in water and remains constant in the range of temperatures studied, except for guaiacol and vanillin. Kinetic and equilibrium sorptions were investigated. Sorption kinetics sh…

RP-HPLC-DAD determination of the differences in the polyphenol content of Fucus vesiculosus extracts with similar antioxidant activity.

2021

Abstract Significant quantities of bioactive compounds have been found in the chemical composition of seaweeds. This source of natural antioxidants such as polyphenols appears to attenuate lipid peroxidation caused by oxidative stress, preventing the harmful effects of a number of injuries including ischemia–reperfusion (I/R). Conventional extraction (CE) has been used for years as a traditional method for obtaining bioactive components from seaweeds. However, recent studies highlight ultrasonic-assisted extraction (UAE) as an alternative and more eco-friendly technique. Therefore, the two methods were optimised and compared to obtain a Fucus vesiculosus extract (FVE) with high antioxidant …

Is <i>Limonium cavanillesii</i> Erben (Plumbaginaceae) really an extant species?

1999

A new triploid apomictic species (Limonium perplexum) is described from a single coastal locality of E Spain. The new species has been previously confused with L cavanillesii Erben, which is only known from few herbarium specimens and it is believed to be extinct. Overall morphology, chromosome number, and the pollen/stigma combination suggest that L perplexum belongs to the L. duriusculum complex. Based on morphological grounds it is suggested that L. cavanillesii Erben could have been originated through a crossing between L perplexum and L dufourii .

Sociālie mediji kā mārketinga komunikācijas instruments: "Manilla" un "Coo Culte" piemēri

2016

Bakalaura darba tēma ir “Sociālie mediji kā mārketinga komunikācijas instruments: “Manilla” un “Coo Culte” piemēri”, kuras ietvaros tiek noskaidrota problēmas aktualitāte Latvijas uzņēmumu vidū. Pētījuma mērķis ir noskaidrot, kādā veidā un kādam nolūkam tādi uzņēmumi kā “Manilla” un “Coo Culte” izmanto sociālos medijus mārketinga komunikācijai, kā arī kādus rezultātus tie snieguši abiem uzņēmumiem. Darba izvirzītie uzdevumi ir izpētīt un apkopot literatūru par mārketingu, sociālajiem medijiem un patērētāju uzvedību, veikt pētījumu (kontentanalīzi, aptauju un interviju) un tā analīzi, kā arī formulēt secinājumus. Bakalaura darba gaitā tika secināts, ka rūpīgi pārdomāta mārketinga komunikācij…

Mens sana in corpore exhausto. Emociones y gestión de sí en escuelas secundarias del sur global

2020

In recent years, emotional education has become a central element in a series of guidelines on a global scale that have been translated into various state initiatives aimed at education. Thus, Mens sana in corpore exhausto proposes to demonstrate the tension that is expressed between the growing series of discourses on emotional education and the school climate and the exhaustive bodies of teachers and directors of public secondary schools in the Metropolitan Region of Buenos Aires (RMBA). By way of hypothesis, these policies are considered to work on the bodies of teachers and directors, encouraging them to continue and not stop under the logic of management and self-management that throw …

CONNESSIONI ECOLOGICO-FUNZIONALI NEGLI STRUMENTI DI PIANIFICAZIONE: IL CASO DI VITORIA-GASTEIZ IN SPAGNA

2019

L’articolo si propone di indagare il tema delle connessioni ecologico-funzionali sotto il profilo del riconoscimento normativo all’interno degli strumenti di pianificazione. La questione, non adeguatamente affrontata dalla letteratura scientifica di riferimento in tema di reti ecologiche, diviene di nodale rilevanza nel processo di radicamento dei modelli ecologico-reticolari nei dispositivi che regolano le trasformazioni dell’uso del suolo. Il caso di Vitoria-Gasteiz, capoluogo del Pais Vasco in Spagna, appare significativo in tal senso in quanto, in seno ad un lungo percorso di costruzione del suo Anillo verde all’interno del piano urbanistico, riconosce sotto il profilo regolativo tali e…

Highly selective generation of vanillin by anodic degradation of lignin: a combined approach of electrochemistry and product isolation by adsorption

2015

The oxidative degradation of lignin into a variety of valuable products has been under investigation since the first half of the last century. Especially, the chance to claim this cheap, abundant and renewable source for the production of the important aroma chemical vanillin (1) was one of the major driving forces of lignin research. So far most of the developed methods fail in technical application since no viable concept for work-up is included. This work represents a combined approach of electrochemical conversion of Kraft lignin and product recovery by adsorption on a strongly basic anion exchange resin. Electrolysis conditions are optimized regarding reaction temperatures below 100 °C…

Propuesta metodológica para el diagnóstico del autobús urbano en ciudades medias-pequeñas

2016

Preparation of fouling resistant and highly perm-selective novel PSf/GO-vanillin nanofiltration membrane for efficient water purification

2022

International audience; To meet the rising global demand for water, it is necessary to develop membranes capable of efficiently purifying contaminated water sources. Herein, we report a series of novel polysulfone (PSf)/GO-vanillin nanofiltration membranes highly permeable, selective, and fouling resistant. The membranes are composed of two-dimensional (2D) graphite oxide (GO) layers embedded with vanillin as porogen and PSf as the base polymer. There is a growing interest in addressing the synergistic effect of GO and vanillin on improving the permeability and antifouling characteristics of membranes. Various spectroscopic and microscopic techniques were used to perform detailed physicoche…