Caracterisation agronomique, physico-chimique et nutritionnelle de quatre varietes hybrides de carotte (Daucus carota) au nord de la Cote d’Ivoire

La carotte est prisée à cause de ses vertus nutritionnelles et thérapeutiques qui concourent à un régime sain et équilibré. La présente étude vise à déterminer et comparer les caractéristiques agronomiques, physico-chimiques et nutritionnelles de quatre variétés hybrides de carotte cultivées au nord de la Côte d’Ivoire. Le dispositif expérimental était composé de blocs complets randomisés, avec quatre traitements et quatre répétitions. Les écartements entre les plants ont été de 25 cm x 8 cm. Les facteurs de croissance et le rendement ont été évalués et les paramètres physico-chimiques et nutritionnels ont été dosés, à partir d’échantillons de racines des variétés. Les résultats ont montré que le témoin Amazonia est caractérisé par des taux élevés en acidité titrable et en cendre. La variété Pamela+ est caractérisée par un nombre de feuilles, un taux d’humidité, une longueur des racines et un rendement élevés. La variété Bahia est marquée par des teneurs plus élevées en protéines et en glucides. La variété Madona se distingue plutôt par un pH et des teneurs en lipides relativement plus importants. La variété Pamela+ contribuera à augmenter les revenus des producteurs et à réduire la pauvreté au nord de la Côte d’Ivoire.Mots-clés: Caractéristiques, carotte, Côte d’Ivoire, hybrides, rendementEnglish Title: Agronomic, physicochemical and nutritional characterization of four hybrids varieties of carrot (Daucus carota) in northern Côte d’IvoireEnglish AbstractCarrot is appraisal because of its nutritional and therapeutic virtues that contribute to a healthy and balanced diet. The current study aims to determine and compare the agronomic, physicochemical and nutritional characteristics of four hybrids varieties of carrot cultivated in northern Côte d’Ivoire. The experimental lay out was composed of randomized complete blocks with four treatments and four replicates. The spacings between seedlings were of 25 cm x 8 cm. Growth parameters and yield were assessed and physicochemical and nutritional parameters were determinate using samples of roots of the varieties. The results of study showed that the control Amazonia is characterized by high rates of titratable acidity and ash content. The variety Pamela+ is characterized by high values of leaves number, humidity rate, length and yield of roots. Bahia variety is marked by high levels of protein and carbohydrates. Madona variety distinguishes itself rather by relatively high pH and lipid contents. The variety Pamela+ will contribute to increase farmers’ incomes and thus reduce poverty in northern Côte d’Ivoire.Keywords: Characteristics, carrot, Côte d’Ivoire, hybrids, yiel

Autoantibodies neutralizing type I IFNs are present in ~4% of uninfected individuals over 70 years old and account for ~20% of COVID-19 deaths

Circulating autoantibodies (auto-Abs) neutralizing high concentrations (10 ng/ml; in plasma diluted 1:10) of IFN-α and/or IFN-ω are found in about 10% of patients with critical COVID-19 (coronavirus disease 2019) pneumonia but not in individuals with asymptomatic infections. We detect auto-Abs neutralizing 100-fold lower, more physiological, concentrations of IFN-α and/or IFN-ω (100 pg/ml; in 1:10 dilutions of plasma) in 13.6% of 3595 patients with critical COVID-19, including 21% of 374 patients >80 years, and 6.5% of 522 patients with severe COVID-19. These antibodies are also detected in 18% of the 1124 deceased patients (aged 20 days to 99 years; mean: 70 years). Moreover, another 1.3% of patients with critical COVID-19 and 0.9% of the deceased patients have auto-Abs neutralizing high concentrations of IFN-β. We also show, in a sample of 34,159 uninfected individuals from the general population, that auto-Abs neutralizing high concentrations of IFN-α and/or IFN-ω are present in 0.18% of individuals between 18 and 69 years, 1.1% between 70 and 79 years, and 3.4% >80 years. Moreover, the proportion of individuals carrying auto-Abs neutralizing lower concentrations is greater in a subsample of 10,778 uninfected individuals: 1% of individuals <70 years, 2.3% between 70 and 80 years, and 6.3% >80 years. By contrast, auto-Abs neutralizing IFN-β do not become more frequent with age. Auto-Abs neutralizing type I IFNs predate SARS-CoV-2 infection and sharply increase in prevalence after the age of 70 years. They account for about 20% of both critical COVID-19 cases in the over 80s and total fatal COVID-19 cases. © 2021 The Authors, some rights reserved