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  • Open Access


    Potential roles of functional bacterial amyloid proteins, bacterial biosurfactants and other putative gut microbiota products in the etiopathogeny of Parkinson’s Disease


    BIOCELL, Vol.45, No.1, pp. 1-16, 2021, DOI:10.32604/biocell.2021.013452

    Abstract An increasing number of studies provide evidence for the existence of a microbiota-gut-brain axis and its potential involvement in the development of sporadic Parkinson’s disease and other neurodegenerative conditions. The neuropathologic hallmark of Parkinson’s disease is the presence of brain intraneuronal aggregates of misfolded alpha-synuclein, known as Lewy bodies. Some gut microbiota products may trigger alpha-synuclein conformational changes in the neurons of the enteric nervous system, which can then spread to the brain in a prion-like fashion through the vagus nerve. Others may interfere with neuroinflammatory pathways and susceptibility to neurodegeneration. In this review, we assess the potential role of… More >

  • Open Access


    Phytohormonal and metabolism analysis of Brassica rapa L. ssp. pekinensis with different resistance during Plasmodiophora brassicae infection


    BIOCELL, Vol.44, No.4, pp. 751-767, 2020, DOI:10.32604/biocell.2020.012954

    Abstract Clubroot of Chinese cabbage (Brassica rapa L. ssp. pekinensis), caused by the obligate parasite Plasmodiophora brassicae, accounts for serious yield losses. The aim of our study was to explore the phytohormone levels and metabolome changes in the roots of resistant and susceptible B. rapa genotypes at a late stage of infection, i.e., 28 days post-infection. Both genotypes showed decreased auxin levels after P. brassicae infection except for indole-3-acetic acid. Overall, the susceptible genotype had higher auxin and cytokinin levels after infection, with the exception of trans-zeatin and 3- indolebutyric acid as compared to the resistant genotype. Jasmonic acid levels declined… More >

  • Open Access


    Synthesis of Photoactive Compounds from Tall Oil Fatty Acids

    Beatrise Sture1,*, Mikelis Kirpluks1, Sergejs Gaidukovs2, Edgars Vanags1

    Journal of Renewable Materials, Vol.8, No.9, pp. 1077-1089, 2020, DOI:10.32604/jrm.2020.09294

    Abstract Photocurable systems are more effective, faster and require less energy than conventional thermal curing methods. To facilitate the ongoing transition toward a biobased economy, photoactive compounds were synthesized from tall oil fatty acids (TOFA) which is a by-product from wood pulping. In this study, photoactive monomers were synthesized by two different chemical pathways using oleic acid and TOFA as raw materials. Firstly, double bonds present in TOFA were epoxidized, followed by epoxy ring-opening with acrylic acid which introduced photoactive functional groups into the fatty acid backbone. Intermediates and final products were analysed using titration methods (acidic value, epoxy value, iodine… More >

  • Open Access


    Synthesis and Interfacial Properties of Bio-Based Zwitterionic Surfactants Derived from Different Fatty Acids in Non-Edible Vegetable Oils

    Hongze Gang1,2, Qiqi Zhang1, Wei Wang1, Bangxin Cai1, Jinfeng Liu1,2, Shizhong Yang1,2, Bozhong Mu1,2,*

    Journal of Renewable Materials, Vol.8, No.4, pp. 417-429, 2020, DOI:10.32604/jrm.2020.09201

    Abstract Waste cooking oils and non-edible vegetable oils are abundant and renewable resources for bio-based materials which have showed great potential applications in many industries. In this study, five fatty acids commonly found in non-edible vegetable oils, including palmitic acid, stearic acid, linoleic acid, linolenic acid, ricinoleic acid, and their mixtures, were used to produce bio-based zwitterionic surfactants through a facile and high-yield chemical modification. These surfactants demonstrated excellent surface/interfacial properties with the minimum surface tensions ranging from 28.4 mN/m to 32.8 mN/m in aqueous solutions. The interfacial tensions between crude oil and surfactant solutions were remarkably reduced to lower values… More >

  • Open Access


    Storage lipids and proteins of Euterpe edulis seeds


    BIOCELL, Vol.33, No.2, pp. 99-106, 2009, DOI:10.32604/biocell.2009.33.099

    Abstract Comparative studies on fatty acid and protein composition of the endosperm and embryo of palmito (Euterpe edulis Martius) were conducted using gas-liquid chromatography and sodium dodecyl sulfate–polyacrylamide gel electrophoresis. On a dry weight basis, the embryo contained extremely lower amounts of lipids and proteins than did the endosperm, which was associated with the scarce lipid and protein bodies previously reported in axis and cotyledon. The fatty acid composition also exhibited differences between both tissues: (I) the fatty acid diversity was greater in embryo than in endosperm; (II) embryo and endosperm contained predominantly linoleic, palmitic, oleic and stearic acids even though… More >

  • Open Access


    Comparative analysis of fatty acids, tocopherols and phytosterols content in sunflower cultivars (Helianthus annuus) from a three-year multi-local study

    Ayerdi Gotor A1,5*, M Berger1, F Labalette2, S Centis3, J Daydé1, A Calmon1,4

    Phyton-International Journal of Experimental Botany, Vol.84, No.1, pp. 14-25, 2015, DOI:10.32604/phyton.2015.84.014

    Abstract Sunflower oil is naturally rich in both unsaturated fatty acids and numerous minor components, with high levels of α-tocopherol and phytosterols that could play an important role in plant protection. These micronutriments, tocopherols and phytosterols, also exhibit health benefits for humans including reducing both cardiovascular diseases and aging disorders. α−Tocopherol represents more than 95% of total sunflower tocopherol and has the greatest vitaminic activity. Furthermore, this oil contains high amounts of β-sitosterol which is a promising health beneficial phytosterol. The objective of this study was to compare the content and composition of fatty acids, tocopherols and phytosterols in sunflower oil… More >

  • Open Access


    Influence of soil tillage and Phoma macdonaldii on sunflower (Helianthus annuus L.) yield and oil quality

    Mirleau-Thebaud V1,2, JD Scheiner1, J Dayde1

    Phyton-International Journal of Experimental Botany, Vol.80, pp. 203-210, 2011, DOI:10.32604/phyton.2011.80.203

    Abstract Plant yield and oil content determine sunflower production. Those plant production determinants depend in turn on the plant–environment interaction. In the South West of France, there have been recent advances in soil tillage. To date, 35% of the soil surface dedicated to sunflower is cropped under a reduced tillage system. Major constraints to sunflower cropping are water stress and cryptogamic diseases. The second most important sunflower disease in the South West of France is premature ripening caused by Phoma macdonaldii. Aims of this work were to: 1) understand how these factors influence sunflower yield, and 2) quantify the fatty acid… More >

  • Open Access


    Extraction and Characterization of Aucoumea klaineana Pierre (Okoume) Extractives

    Engozogho Anris Starlin Peguy1,2, Bikoro Bi Athomo Arsene1,2, Vidal Marcia5, Denaud Louis4, Safou Tchiama Rodrigue2,3, Charrier Bertrand1

    Journal of Renewable Materials, Vol.7, No.6, pp. 517-522, 2019, DOI:10.32604/jrm.2019.04051

    Abstract In order to promote convenient strategies for the utilization of wood wastes from aucoumea klaineana pierre (okoume) timber industry, various chemical analysis were carried out on samples from different origins. Total extractives content of the bark, sapwood and heartwood of okoume were evaluated. thermogravimetric analyses were performed and the stiasny number was calculated. it was found that the bark was richer in fatty acid of high molecular weight while the sapwood was rich in fatty acid of low molecular weight. the condensed tannins content varied according to the origin and the part of the tree. these new findings should be… More >

  • Open Access


    Highly Functional Polyol Synthesis from Epoxidized Tall Oil Fatty Acids

    Edgars Vanags*, Mikelis Kirpluks, Ugis Cabulis and Zuzana Walterova

    Journal of Renewable Materials, Vol.6, No.7, pp. 764-771, 2018, DOI:10.7569/JRM.2018.634111

    Abstract In this work, free tall oil fatty acids were epoxidized with in-situ generated peroxyacetic acid. Reaction kinetics of epoxidation was investigated by oxirane content and iodine value titrimetric determination, as well as FTIR spectra analysis. A highly functional biobased polyol was synthesized by functionalizing epoxidized tall oil fatty acids with triethanolamine using Montmorillonite K10 as a catalyst. The obtained polyol was analyzed by FTIR and MALDI-TOF MS. The most common chemical and physical characteristics of obtained polyol were determined. More >

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