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  • Open Access


    Biochemical and Thermal Analysis of Spirulina Biomass through FTIR, TGA, CHN

    Ruma Arora Soni1,*, K. Sudhakar1,3,4,*, R. S. Rana2

    Energy Engineering, Vol.118, No.4, pp. 1045-1056, 2021, DOI:10.32604/EE.2021.016082

    Abstract Spirulina is a sort of algae that grows in both fresh and seawater. It is considered the Earth’s most nutritionally dense food. Certain claims about Spirulina’s beneficial health properties are attributed to the relatively high protein content of the cells. Spirulina’s lipid, fatty acid profile, and biochemical composition have received little attention. The purpose of this study is to investigate the nature and decomposition of spirulina biomass at various temperatures. In the present investigation, Fourier transforms infrared spectroscopy, thermogravimetric analysis, and elemental analysis were used to study spirulina biomass biochemical characteristics. The optimal content of spirulina protein, lipid, and the… More >

  • Open Access


    Role of macroalgae in biomonitoring of pollution in «Marchica», the Nador lagoon

    Ben Chekroun K1, A Moumen1, N Rezzoum2, E Sánchez3, M Baghour1

    Phyton-International Journal of Experimental Botany, Vol.82, pp. 31-34, 2013, DOI:10.32604/phyton.2013.82.031

    Abstract The Aquatic system contamination by organic pollutants and heavy metals is one of the most serious problems that might face the environment and organisms as a whole. Interestingly, the accumulation of these pollutants is due to the anthropogenic activity, namely the intensive use of fertilizers to obtain high yields in crop production. In this paper, we compared the levels of chlorophylls, proteins, dry weight and sucrose in some red (Alsidium sp. and Gracilaria sp.) and green algae (Ulva sp.) collected from Mohandis, near Kariat and Bou Areg. Our results indicate that the algae collected nearby Bou Areg, an area well-known… More >

  • Open Access


    Analysis of methodologies for the study of composition and biochemical carbohydrate changes in harvest and postharvest onion bulbs

    Abrameto MA, CM Pozzo Ardizzi, MI Gil, LM Molina

    Phyton-International Journal of Experimental Botany, Vol.79, pp. 123-132, 2010, DOI:10.32604/phyton.2010.79.123

    Abstract Costly investments in storage and transport of onion bulbs makes it increasingly important to identify cultivars with the best chance of long-term storage. This paper discusses our own and other researchers’ results and laboratory procedures on onion’s pungency, soluble solids, dry matter, respiration rate, carbohydrates and catabolism-related enzymes under different storage conditions. The variability in parameters such as carbohydrate composition, pungency, soluble solids and soluble uronic acid concentration in water is growth dependent, and defines the quality of onion bulbs at harvest time. During storage, these parameters can be modified by environmental conditions, presence of pathogens or termination of dormancy.… More >

  • Open Access


    Defoliation frequency affects morphophysiological traits in the bunchgrass Poa ligularis

    Gittins1 C, CA Busso2, G Becker1, L Ghermandi3, G Siffredi1

    Phyton-International Journal of Experimental Botany, Vol.79, pp. 55-68, 2010, DOI:10.32604/phyton.2010.79.055

    Abstract Poa ligularis is an important forage in Patagonian rangelands. Populations of this perennial bunchgrass have been severely affected by overgrazing. We propose that increased defoliation frequencies will decrease (1) aerial- and belowground dry matter production, (2) root survival, and (3) concentration and content of total non-structural crown + root carbohydrates, and (4) increase root mortality. Five defoliation frequencies (plus 1 control) were applied in a representative grassland of the Occidental District in Patagonia during two consecutive growing seasons. All four hypotheses were rejected. Aerial and belowground dry matter production increased from one to two or three defoliations. Root production and… More >

  • Open Access


    Effect of Soluble Components From Plant Aggregates on the Setting of the Lime-Based Binder

    Lepeng Wang1, Hélène Lenormand1,*, Hafida Zmamou1, Nathalie Leblanc1

    Journal of Renewable Materials, Vol.7, No.9, pp. 903-913, 2019, DOI:10.32604/jrm.2019.06788

    Abstract Plant aggregate-based building materials are a viable solution for reducing greenhouse gas emissions and providing good thermal and acoustic performances. In this study, the investigated lightweight mortars require a hydraulic reaction. Laboratory and on-site empirical observations about plant aggregate-based materials indicate a delay in setting time and a decrease in the mechanical performances of concretes based on plant aggregates. The natural origin of plant-aggregates causes a lot of variability in their properties. Related studies have shown that the incompatibility between plant aggregates and cement is mainly caused by the dissolved and decomposed components of plant aggregates in alkaline environments. Currently,… More >

  • Open Access


    Tannin-Based Biofoams-A Review

    Antonio Pizzi*

    Journal of Renewable Materials, Vol.7, No.5, pp. 477-492, 2019, DOI:10.32604/jrm.2019.06511

    Abstract This review details the development of tannin-based biofoams for fire resistance and acoustic insulation and details the different varieties of these foams that have been developed, from tannin-furanic self-blowing foams to tannin-furanic polyurethanes and finally non-isocyanate tannin-based-carbohydrates polyurethanes (NIPU). More >

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