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Industrial Crops and Products
Elsevier Science Publishers
Industrial Crops and Products

Elsevier Science Publishers

0926-6690

Industrial Crops and Products/Journal Industrial Crops and ProductsSCIISTPEI
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    How does Flourensia microphylla extract affect polyphenolic composition, antioxidant capacity, and antifungal activity?

    Carrillo-Lomeli D.A.Rodriguez-Garcia R.Gonzalez-Morales S.Villarreal-Quintanilla J.A....
    14页
    查看更多>>摘要：? 2022 Elsevier B.V.Tomato (Solanum lycopersicum L.) fruit is one of the most popular vegetables worldwide, as it is widely consumed due to its many nutrients and antioxidants. Fusarium oxysporum and Alternaria alternata are two phytopathogenic fungi that attack tomato in the field and postharvest. To control them, synthetic chemical fungicides are used; however, the fungi develop resistance to them, and they can cause damage to human health and the environment. Therefore, research on plant polyphenolic extracts with fungicidal potential has increased. Flourensia microphylla has shown antifungal activity in vitro against different phytopathogens; however, the extraction process is a main factor affecting this activity. Ultrasound-assisted extraction (UAE) has been reported to increase the bioactivity of plant extracts. Based on the above, the aims of the present study were to evaluate how F. microphylla extract affects polyphenolic composition, antioxidant capacity, and antifungal activity. A total of 9 F. microphylla extracts were obtained by UAE, and a control extract was obtained by conventional extraction. The yield, total phenolic and flavonoid contents (TPC and TFC, respectively), antioxidant activities by three methods, and polyphenol identification by high-performance liquid chromatography (UHPLC) of the extracts were evaluated. The antifungal activity of the extract was evaluated in vitro against F. oxysporum and A. alternata, for which an extract treatment was selected considering the treatment that obtained the highest TFC and antioxidant activity values as a criterion. As a result, three phenolic acids and six flavonoids were detected in the extract treatments: gallic, 4-hydroxybenzoic and ferulic acids, catechin, naringin, quercetin, kaempferol, isorhamentin and chrysin. In addition to reducing the extraction times, the treatment that was selected corresponded to a solvent-to-sample ratio of 40 mL/g and an extraction time of 20 min. The selected extract resulted in an extraction yield of 23.4 g/100 g dry weight (DW), TPC of 252.8 mg gallic acid equivalents (GAE)/g DW, and TFC of 435.9 mg quercetin equivalents (QE)/g DW. For antioxidant activities, the 2,2-diphenyl 1-picrylhydrazyl (DPPH), 2,2-azinobis (3-ethylbenzothiazoline-6-sulfonic acid) (ABTS) and reducing power values were 74.2, 740.4 mM Trolox/g DW and 33.0 mg ascorbic acid/g DW, respectively. Moreover, the F. microphylla treatment selected inhibited 87.72 % of the mycelial growth of F. oxysporum and 100 % of that of A. alternata, demonstrating fungistatic and fungicidal activity, respectively, in the fungi under study. Thus, the phenolic extract obtained by UAE increased the contents of phenolic compounds, mainly flavonoids, as well as antioxidants, which potentiated the bioactivity of F. microphylla against phytopathogenic fungi. In addition, the antifungal activity could be attributed to the presence of flavonoid compounds identified in the selected polyphenolic extract.
      原文链接:
    • NSTL
    • Elsevier

    Wood based quasi-solid-state Zn-air battery with dual honeycomb-like porous carbon and cationic nanocellulose film

    Qiu C.Zhang L.Wang B.Yang G....
    9页
    查看更多>>摘要：? 2022 Elsevier B.V.Conversion of low-value biomass to hierarchically porous carbon-based materials for oxygen reduction reactions (ORR), without using conventional template methods, is of particular significant for energy storage technology. Herein, dual honeycomb-like porous carbon inspired by multiscale structure of wood was assembled with cationic nanocellulose film into Zn-air battery. Nitrogen-doped hierarchically porous carbon was obtained by a simple two-step process involving alkaline extraction and pyrolysis with NH4Cl. Alkaline extraction was utilized for partially degrading lignin and heterosaccharide from unprocessed wood to create a porous wood with numerous nanopores and 3D loose structure. The inner and outer parts of obtained porous wood were further pore-optimized and doped with NH4Cl by a consequent pyrolysis step. The resulting carbon-based material (AHWC) possessed high specific surface area (1601.8 m2 g?1), well-developed hierarchical porosity, and high N content enabled excellent electrocatalytic oxygen reduction performance. Compared with commercial Pt/C catalysts in KOH electrolyte, AHWC exhibits nearly two times higher kinetic currents in the low overpotential region, comparable number of transferred electrons, and significantly higher operating stability. This carbon-based material also showed an excellent capacity and energy density equal to 792 mA h g?1 and 927 W h kg?1, together with superior long-term durability (200 h at the current density of 10 mA cm?2) when assembled as the active electrode material into a Zn-air battery. Additionally, cationic modified nanocellulose film (C-CNF-M), acting as a solid electrolyte, was assembled with AHWC for a quasi-solid-state Zn-air battery which exhibited excellent specific capacity (672.2 mA h g?1), energy density (644.11 W h kg?1) and cycling stability (500 min at 1 mA cm?2). The AHWC establish a bridge between papermaking and the field of energy storage by green conversion of biomass and fabrication of porous carbon-based materials and cellulose based electrolyte with excellent properties applicable to electrochemical energy devices.
      原文链接:
    • NSTL
    • Elsevier

    Boosting 2,5-Furandicarboxylic acid production via coating carbon over CeO2 in a Pt catalyst

    Zheng X.Mao H.Li C.Liu X....
    10页
    查看更多>>摘要：? 2022 Elsevier B.V.Production of 2,5-furandicarboxylic acid (FDCA) via aerobic oxidation of 5-hydroxylmethylfurfural (HMF) is promising but still challenging due to the unsatisfied activity and stability of catalyst. Herein, we prepared a composite of CeO2 coated carbon supporting Pt catalyst and use it in the oxidation of HMF with assistance of Na2CO3. A high FDCA yield of 99.0 % was achieved on 5 %Pt/CeO2 @C catalyst under the optimized condition. To reveal the functions of the CeO2 and carbon coating, control experiments, catalyst characterizations and HMF adsorption experiment were conducted. Combining these results, a possible mechanism is proposed. The synergism between CeO2 and carbon is proposed and the role of CeO2 and carbon coating is discussed. CeO2 is in charge of storage/release electrons to activate oxygen due to its superior redox ability, while carbon coating is responsible for adsorbing HMF and conducting electrons between CeO2 core and carbon surface. In addition, the stability was also evaluated and after 5 recycles, the yield of FDCA did not change obviously.
      原文链接:
    • NSTL
    • Elsevier

    Tyrosinase inhibition of major secondary metabolites isolated from endangered Meconopsis bhutanica Tosh.Yoshida & Grey-Wilson

    Yin Z.-H.Li Y.-F.Gong Y.Gu J....
    6页
    查看更多>>摘要：? 2022 Elsevier B.V.Meconopsis bhutanica Tosh.Yoshida & Grey-Wilson (Meconopsis Vig., fam: Papaveraceae), is a Critically Endangered species utilized in Tibetan medicine. Due to the very limited numbers of wild individuals, the chemical and biological basis of its medicinal value has not been studied. The objective of this study was to explore the chemical constituents of Meconopsis bhutanica and to determine the antityrosinase activity and influence on human melanoma cell lines A375. The chemical constituents were mainly isolated through column chromatography and semipreparative high performance liquid chromatography, and the structures were elucidated by nuclear magnetic resonance spectra. The inhibition on tyrosinase was examined by microplate reader. High performance liquid chromatography, spectrofluorophotometer, and molecular docking were used to analyze the effects on the function and structure of tyrosinase. The influence on A375 cells were measured by the Cell Counting Kit. Finally, a total of eleven phenolic compounds were isolated and identified from Meconopsis bhutanica. All of these compounds were found in this plant for the first time. The results of antityrosinase activity assay showed that compound 9 exhibited tyrosinase inhibition obviously. Furthermore, compound 9 could decrease the oxidation products and fluorescence emission intensity of tyrosinase. However, compound 9 had no effect on the proliferation of human melanoma A375 cells at high concentrations. The present paper uncovered the chemical composition of Meconopsis bhutanica and assessed the tyrosinase inhibition activity, which will provide data for comparing bioactive chemical constituents between the wild and cultivated ones. This study paved the way for the conservation, cultivation, and application of Meconopsis bhutanica.
      原文链接:
    • NSTL
    • Elsevier

    Spatial and temporal patterns of secoiridoid and xanthone biosynthetic pathways during early development of Centaurium erythraea Rafn, as altered by ploidy level

    Siler B.Milutinovic M.Misic D.Bohanec B....
    12页
    查看更多>>摘要：? 2022 Elsevier B.V.Centaurium erythraea, used as medical plant from the earliest times, is an immense depot of quite rare bioactive compounds. Secoiridoids (sweroside, swertiamarin, and gentiopicrin) and xanthones (methylbellidifolin and decussatin) are predominant bioactive compounds in C. erythraea. The present study aims at providing new insights into how the content of these bioactive principles can be related with plant ploidy level by characterizing possible differences in their biosynthesis and accumulation between diploid and tetraploid genotypes from both spatial and temporal aspects. In general, shoots are determined as the major site of secoiridoids’ and xanthones’ accumulation, whose ratio vary during the development. Genes involved in iridoid and xanthone metabolic pathways were found to be coordinately regulated at the transcriptional level both during the development and among organs. Biosynthetic gene expression levels were found highly correlated with the content of major compounds from these two classes. Diversification in chemical profiles between tetraploid and diploid genotypes may result from the expression difference between homologous loci correspondent to several key biosynthetic genes, which trigger changes in the two metabolic routes. Thus, enhanced expression of genes coding for geraniol synthase (GES), 8-hydroxygeraniol oxidoreductase (8HGO), and 7-deoxyloganic acid hydrolase (7DLH2) is strongly associated with intensive production of iridoids. Interestingly, transcript levels of beta-glucosidase (CebGLU), a candidate to catalyze the first step in the secoiridoid catabolism, is significantly positively correlated with the content of major secoiridoids. Elevated expression of genes coding for benzophenone synthase (BS) and 3-hydroxybenzoate:CoA ligase (3HBL) appear to account for enhanced production of hexa-substituted xanthones. Regarding content of iridoids and xanthones, a diploid genotype appeared to be more productive than a tetraploid genotype under controlled in vitro conditions, therewithal displaying significantly higher biomass.
      原文链接:
    • NSTL
    • Elsevier

    Sambucus nigra L. cell cultures produce main species-specific phytochemicals with anti-inflammatory properties and in vitro ACE2 binding inhibition to SARS-CoV2

    Borodusie A.Balode M.Nakurte I.Berga M....
    9页
    查看更多>>摘要：? 2022 Elsevier B.V.Sambucus nigra fruit and flower extracts exhibit anti-viral and anti-inflammatory properties however, the potential of S. nigra in vitro cell suspension cultures to produce biologically active compounds remains unexplored. This study describes the establishment of S. nigra cell suspension cultures and their phytochemical content and biological activity. S. nigra cell cultures contain major compounds characteristic for whole-plant S. nigra tissues albeit at uncharacteristic ratios. Elicitation with methyl jasmonate, visual selection of pigmented cells, and optimization of culture parameters resulted in cell suspensions with high contents of anthocyanins, organic acids, and phenolic compounds. Enzyme-linked immunosorbent assay (ELISA) and fluorometric assay-based assessment of biological activity of developed cultures demonstrated inhibitory capacity against cyclooxygenase enzyme COX2 activity and against the binding of SARS-CoV2 receptor-binding domain (RBD) to angiotensin-converting enzyme 2 (ACE2) in vitro suggesting that S. nigra cell suspensions exhibit anti-inflammatory and viral entry blocking potential. Differences in phytochemical content and biological activity of S. nigra cell suspensions subjected to different optimization approaches indicate potential for optimization towards desired biotechnological products with anti-inflammatory properties and inhibitory capacity against viral binding.
      原文链接:
    • NSTL
    • Elsevier

    Second-generation bioethanol production from corncob – A comprehensive review on pretreatment and bioconversion strategies, including techno-economic and lifecycle perspective

    Gandam P.K.Pabbathi N.P.P.Baadhe R.R.Chinta M.L....
    10页
    查看更多>>摘要：? 2022 Elsevier B.V.Bioethanol is highly produced and most used biofuel, with lignocellulosic biomass as an ideal choice of feedstock. This study particularly highlights various strategies of second-generation (2 G)-bioethanol production from corncobs. A detailed account of the effects of different pretreatment methods, detoxification methods and fermentation approaches on ethanol yield obtained from corncobs is given to make the reader understand the possibilities of further research improvements in this field. About 31 % of the works, reported dilute sulphuric acid pretreatment. H2SO4, NaOH and their combination pretreatments collectively accounted for 50 % of the total reports. Most other pretreatments were either less reported or completely missing. A combination of acid and alkali pretreatments along with a proper detoxification step is proven to achieve ethanol yield as high as 100 % of the theoretical yield. Techno-economic analysis (TEA), established that the overall cost of operation is essentially comprised of chemical cost and energy consumption. Hence pretreatment and detoxification are key steps in determining process economics. Genetic engineering to construct inhibitor tolerant and consolidated bioprocessing (CBP) compatible microbes for ethanol fermentation is another way to achieve an economical process. Techno economic analysis (TEA) and life cycle assessment (LCA) studies suggested that the key to achieving an overall sustainable corncob-biorefinery is to simultaneously valorize xylan and lignin along with glucan. Based on the market value of the final products, xylooligosaccharides (XOS) are much more beneficial than xylose based ethanol. Hence an ideal corncob-biorefinery would involve the production of high valued end-products from lignocellulose components. However, methods for uniform research data representation, greener pretreatment technologies, and integrated approaches to put together TEA and LCA studies are yet to be developed to assess the corncob-based 2 G bioethanol technologies.
      原文链接:
    • NSTL
    • Elsevier

    Renewable phosphorous-based flame retardant for lignocellulosic fibers

    El Hage R.Nakhl M.Sonnier R.Le Moigne N....
    12页
    查看更多>>摘要：? 2022 Elsevier B.V.An easy-to-use and environmentally friendly method is proposed to increase the fire retardancy of natural fibers. Hemp fibers were phosphorylated by the grafting of phytic acid, a renewable and environmentally friendly phosphorous flame retardant and urea in aqueous solution. The fibers were characterized by X-ray fluorescence, solid state 13C and 31P NMR analysis, pyrolysis combustion flow calorimetry and tensile testing. The swelling behavior of the fibers evaluated by optical microscopy observations showed that urea promotes swelling and consequently the grafting of P and N in the fiber. It has been also shown by a bleaching step that delignification makes the cellulose slightly more accessible for grafting. Non-flammable fibers were produced with relatively low P and N contents (> 0.5 % w/w and > 0.7 % w/w respectively). However, the phosphorylation process significantly decreased cellulose crystallinity and mechanical properties of the resulting fibers. For P = 0.9 %, a 30 % decrease in the tensile strength of hemp fibers was observed. The production of phytic pyrophosphate by thermal dehydration of phytic acid has been proposed from 31P NMR results.
      原文链接:
    • NSTL
    • Elsevier

    Climate change adversely affects the medicinal value of Aconitum species in Alpine region of Indian Himalaya

    Chandra S.Chandola V.Sultan Z.Purohit V.K....
    12页
    查看更多>>摘要：? 2022 Elsevier B.V.Atmospheric CO2 has an apparent impact on plant growth and physiological processes, especially at higher altitudes. Generally considered to boost photosynthetic rate and biomass accumulation, the effects of elevated CO2 (eCO2) have been shown to vary amongst different species. The present study explored the effects of eCO2 on two native Himalayan alpine species viz., Aconitum balfourii and A. heterophyllum of the botanical family Ranunculaceae, known for their potent medicinal properties. Both the species were grown inside open-top chambers and treated with eCO2 (650 ppm; likely scenario by the year 2100 under RCP6) for three growing seasons along with ambient controls. The primary, secondary (Alkaloids) metabolites, tissue nitrogen (N), antibacterial and antioxidant activity of the experimental plants were examined. In both the species under eCO2, total soluble sugars (TSS) were found increased whereas starch content decreased. The secondary metabolites (specific and total alkaloids) and plant N were found declined under elevated CO2 and the antibacterial activity of the plant extracts from eCO2 also subsided. However, an increase in the proline content, lipid peroxidation and antioxidant activity was found under eCO2. Our results thus conclude a reduction in secondary metabolites of Aconites due to eCO2 exposure which can not only affect their survival under extreme environmental conditions but also alter the antimicrobial potency against various pathogens. These significant negative plant responses may ultimately impact trade, economy and industrial application of such herbal drugs.
      原文链接:
    • NSTL
    • Elsevier

    Isolation and characterization of lignin-rich particles as byproducts of bioethanol production from wheat straw to reinforce starch composite films

    Roostazadeh R.Behzad T.Karimi K.
    11页
    查看更多>>摘要：? 2022 Elsevier B.V.Bioethanol was produced from wheat straw by a concentrated alkali pretreatment at specific conditions with a yield of 88 g ethanol per 1 kg of dry straw. To economically improve the bioethanol production process and valorize residual waste, the lignin-rich solid waste particles were isolated from the pretreatment waste liquid and characterized, and finally employed to reinforce starch-based biodegradable film. The solid waste particles were characterized by chemical analysis, dynamic light scattering (DLS), field emission scanning electron microscopy (FESEM), Fourier transform infrared spectroscopy (FTIR), differential scanning calorimetry (DSC), and thermogravimetric analysis (TGA). As bioethanol byproducts, they have mainly contained 88 wt% lignin. The average diameter of the uniform spherical shape extracted particles was determined to be 160 nm by DLS and FESEM. The presence of syringyl and guaiacyl rings were conducted by FTIR. Due to their suitable mechanical performance and thermal resistance, the lignin nanoparticles were employed as reinforcement for green biodegradable starch films. To prepare films, suspensions containing starch, glycerol, and different concentrations of lignin (0–30 wt%) were molded by the solution casting process. The starch-lignin composite films were analyzed by mechanical tensile tests, crystallinity analysis, FESEM, and thermal analysis. From the results, it was found that by adding 20 wt% lignin particles, the tensile strength and modulus of the pure starch film were increased from 4.8 and 0.9–8 and 2.4 MPa which can be partially explained due to crystallinity enhancement of film from 29 % to 48.3 %. In addition, the thermal resistance and the hydrophilic property of the composite films were enhanced due to lignin nanoparticle presence. It can be concluded that the isolation of lignin nanoparticles as waste solid in bioethanol production could be considered as a promising stage in the sustainability of second-generation products from the bioethanol production process.
      原文链接:
    • NSTL
    • Elsevier