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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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    Supercritical fluid extraction of dried Surangi flowers (Mammea suriga)

    Thorat B.N.Pise V.H.
    11页
    查看更多>>摘要：? 2022 Elsevier B.V.In this study, a restrained aromatic plant endemic to the Western Ghats of India, Mammea suriga (Buch. -Ham. ex Roxb.) Kosterm., belonging to the Clusiaceae family was studied to extract potential volatile oils for perfumery applications. Extraction of dried Surangi flowers, harvested once a year during March and April, was performed using supercritical fluid extraction (SFE). The volatile oil was extracted by CO2 at different process parameters of temperature (X1: 40–60 °C), time for extraction (X2: 90–180 min), pressure (X3: 100–200 bar) and flowrate of CO2 (X4: 2–3 ml/min). The optimisation of process parameters was carried out using response surface methodology (RSM). A total of 30 experiments with six central points (as per the RCCD model) were conducted to understand the interaction of independent variables and the impact on the response factors of overall yield (Y1, % (w/w)), wax yield (Y2, % content), absolute yield (Y3, % content) and characteristic component (Y4, % composition). The optimum condition for maximising the overall yield with minimum wax content and maximum content of α-farnesene were found as 35.03 °C, 179 min, 142 bar and 3 ml/min flow of CO2. Experimental readings at the desired optimised conditions were in good agreement with the predicted responses giving an overall yield of 4.75 %, with 100.00 % absolute and 0.67 % of α-farnesene in the composition.
      原文链接:
    • NSTL
    • Elsevier

    Freezing-induced interfacial growth of polypyrrole layers on hierarchical carbon aerogels for robust ultrasensitive pressure sensors

    Li Z.Chen L.Mu M.Yu H....
    10页
    查看更多>>摘要：? 2022 Elsevier B.V.Constructing carbon-based aerogels with mechanical flexibility and good conductivity remains a challenge. Herein, cellulose nanofibers (CNF) as the building block to prepare CNF-based carbon aerogels (CCAs) by the “Bottom to up” strategy, while the polypyrrole (PPy) was interfacially grown on the CCAs to obtain PPy-carbon aerogels composites (CCAs-P). The PPy was uniformly and firmly loaded onto the CCAs framework, leading to the CCAs-P with excellent mechanical properties. The compressive stress of CCAs-P was over 20 times higher than that of CCAs under 80% strain, and its compressive stress was up to 800 kPa. Meanwhile, the CCAs-P had a great sensitivity to weak signals (~ 69 ms) which was capable of accurately monitoring and recording the signals of varied human motions. This is because the interfacial growth process of PPy produces more conducting channels. This study may help to advance the use of carbon-based aerogels in flexible wearable sensing systems.
      原文链接:
    • NSTL
    • Elsevier

    Valorization of cellulose in waste paper into value-added cellobionic acid by genetically engineered Pseudomonas taetrolens

    Oh Y.-R.Eom G.T.Yoo Y.
    10页
    查看更多>>摘要：? 2022 Elsevier B.V.To expand the applications of waste paper (WP), we attempted to valorize waste office paper (WOP) into cellobionic acid (CBA) using a two-step biocatalytic method. First, we prepared cellobiose from WOP using commercial cellulases. To increase cellobiose production, we optimized various reaction conditions; the type of cellulases, reaction temperature, the amount of WOP, and the amount of cellulases. Under the optimized reaction conditions, 23 g/L cellobiose was generated from 80 g/L of WOP. CBA was then produced from the prepared cellobiose using recombinant Pseudomonas taetrolens homologously expressing quinoprotein glucose dehydrogenase. From 23 g/L cellobiose derived from WOP, this strain produced 24.1 g/L CBA. We demonstrated for the first time that WOP could be successfully valorized into CBA using cellobiogenic cellulases and a CBA-producing strain. This study sets the groundwork to produce CBA at a low price and is expected to expand the application of CBA in industries.
      原文链接:
    • NSTL
    • Elsevier

    Hydrogen production from cotton stalk over Ni-La catalysts supported on spent bleaching clay via hydrothermal gasification

    Song Y.-Q.Cong W.-J.Sun J.Dong G.-H....
    10页
    查看更多>>摘要：? 2022 Elsevier B.V.Cotton stalk was gasified to produce H2 with Ni-La based catalysts in subcritical and supercritical water. Approximately 90% H2 yield was obtained under optimized conditions (360 °C, 0.5 g Ni-La catalyst loading, 0.5 g biomass and 10 min) by an orthogonal design with Ni-La/spent bleaching clay (SBC) materials. In addition, the H2 yield of rice and wheat straw increased by 41.5 and 39.5 times, respectively at optimized conditions. It was found that the activity of Ni-La materials supported on SBC ash and Al2O3 was similar, with H2 yields of 108.3% and 115.1% at 380 °C, respectively in 5 min. SBC ash provided a high specific surface area (94.4 m2/g) for the Ni-La catalyst. La-promoted Ni/SBC (0.19 mmol/g) had a stronger acidity than Ni/SBC (0.16 mmol/g). Ni-La/SBC had a broad reduction peak, indicating the uniform dispersion of Ni on the support. Ni-La/SBC materials not only realized the reuse of SBC but also effectively promoted the hydrothermal gasification of agricultural wastes.
      原文链接:
    • NSTL
    • Elsevier

    Highly efficient and low pollution catalytic oxidation of ramie degumming by NHPI

    Yang S.Yu C.Zhang B.Zhang P....
    10页
    查看更多>>摘要：? 2022 Elsevier B.V.A new ramie degumming method, N-Hydroxyphthalimide (NHPI) catalytic oxidation degumming method (NCODM), was proposed to solve the environmental pollution problems as well as the energy consumption problems of the traditional alkaline degumming method (TADM) and the 2,2,6,6-tetramethylpiperidine-1-oxyl (TEMPO) oxidation degumming method (TODM). In this paper, the effect of parameters on the properties of ramie fibers degummed by NCODM was investigated. Then, the degumming process was optimized by comparing with the different degumming methods using central composite design method. The results showed that the H2O2 concentration and reaction time were significant factors that determined the properties of ramie fibers. The optimum H2O2 concentration was 16.70 g/L and the optimum reaction time was 19.38 min. The time required for NCODM was only 79.38 min, which was 26.46% and 62.19% of that of TADM (300 min) and TODM (127.64 min), respectively. Moreover, the chemical oxygen demand (COD) value of the wastewater from NCODM was 31% and 3% lower than that of TADM and TODM, respectively. Therefore, NCODM has great potential to replace the TADM and TODM for ramie degumming.
      原文链接:
    • NSTL
    • Elsevier

    Preparation, structure-function relationship and application of Grifola umbellate polysaccharides

    Li B.Huang G.
    11页
    查看更多>>摘要：? 2022 Elsevier B.V.Polysaccharides are the main active components of Grifola umbellate, most of which are β-glucans with (1→3)-β-glucose main chain and (1→6)-β-glucose side chain structures. Grifola umbellate polysaccharides (GUPs) have antioxidant, immune regulation, anti-tumor, and other effects. But so far, for different types of GUPs, the relationship between their structures and functions has not explicitly been classified and summarized. Herein, the extraction, isolation and purification, structures, derivatization, biological activities and applications of GUPs were reviewed. It provided a reference for the research and development of GUPs in the future.
      原文链接:
    • NSTL
    • Elsevier

    Development of soy protein concentrate/hemp fiber-based biocomposite foams: Effects of alkaline treatment and poly(lactic acid) coating

    Kim B.S.Garcia C.V.Shin G.H.Kim J.T....
    14页
    查看更多>>摘要：? 2022 Elsevier B.V.Petroleum-based foams are used in packaging applications where thermal insulation and shock absorption are needed. However, their associated environmental problems motivate the development of bio-based alternatives. Here, biocomposite foams were prepared using soy protein concentrate (SPC) and alkali-treated hemp fibers. The hemp fibers were treated with 6% NaOH to remove non-cellulose components. The foams were coated by dipping in a poly(lactic acid) (PLA) solution. A concentration of 4% PLA was determined to be optimal for the coating. The mechanical and water barrier properties of the PLA-coated foams were evaluated. The compression modulus, compression strength, and bulk density of the PLA-coated foams were 1045.7 kPa, 2022.5 kPa, and 118.6 mg/mL, respectively, being significantly higher than those of the uncoated foams (404.0 kPa, 590.7 kPa, and 69.4 mg/mL). The moisture uptake and water uptake of the PLA-coated foams were significantly decreased by the coating procedure, indicating 16.2% and 138.3%, respectively. By contrast, the uncoated foams had a moisture uptake and water uptake of 31.8% and 1399.3%, respectively. The observed improvement in mechanical and water barrier properties is likely due to the hydrophobic nature of PLA.
      原文链接:
    • NSTL
    • Elsevier

    Evaluation of harvest time effects on the combustion quality of warm- and cool-season perennial grasses in two contrasting semi-arid environments

    Kusvuran A.Nazli R.I.Tansi V.Ozturk H.H....
    9页
    查看更多>>摘要：? 2022 Elsevier B.V.In order to achieve economically viable and sustainable solid biofuel production from perennial grasses, high biomass productivity must be complemented by good combustion quality. The aim of this research was to compare the combustion quality of 7 cool-season perennial grasses, comprising bulbous canary grass, reed canary grass, smooth brome grass, orchard grass, tall wheatgrass, tall fescue, and perennial ryegrass, and 3 warm-season perennial grasses, comprising switchgrass, miscanthus, and giant reed, over 2 harvest times (autumn, winter/early spring) in 2 contrasting semi-arid environments (Adana, and Cankiri, Turkey). Delaying the harvest from the autumn to the winter or the spring significantly increased the lignin contents of each of the 3 warm-season grasses and generally decreased the contents of all of the minerals, except for Al and Fe, in miscanthus and switchgrass, and K and Na in giant reed, at both locations. Similar trends were also generally observed for all of the cool-season grasses, except for the orchard grass that was grown in Cankiri. Additionally, delayed harvest resulted in lower slagging tendency and sintering risk in all of the perennial grass species, except for giant reed in Cankiri. However, the autumn harvest caused significantly higher lignin, but generally lower N, P, K, Ca, S, Si, Al, and Fe contents, slagging tendency, and sintering risk in most of the cool-season grasses that were grown in Adana. On the other hand, despite the autumn harvest in Adana, and the spring harvest in Cankiri provided a substantial improvement in combustion quality of the cool-season grasses, mainly due to the reduced mineral and increased lignin contents, they still exhibited relatively lower combustion quality than miscanthus and switchgrass, especially in Adana. These results showed that further effort is needed to improve the combustion quality of cool-season grasses in order for them to be primary biomass feedstock alternatives for dry marginal lands of semi-arid environments.
      原文链接:
    • NSTL
    • Elsevier

    Characterization of industry grade soybean wax for potential applications in natural fiber reinforced composite (NFRC) filaments

    Surendran A.N.Ajjarapu K.P.K.Arumugham A.A.Kate K....
    14页
    查看更多>>摘要：? 2022A characterization study was conducted to obtain and analyze the thermal, chemical, and mechanical properties of industry grade wax soybean (Glycine max) for coating soy hull fibers from soybean processing in order to incorporate the soy wax coated soy fibers in additive manufacturing applications. The waxes when coated onto soy hull fibers are expected to better the fiber-polymer interface to produce additive manufacturing filaments with improved mechanical properties to be printed using fused filament fabrication technique. The printed parts can then be used in the automotive industry because the parts will be more sustainable, have less carbon footprint, and increased mechanical properties. The information obtained from this characterization study will be the preliminary step to determine the suitability of the waxes for fiber coating application. Applying soybean waxes in this manner increases the value of soybean waxes from being a source for candle making to being incorporated in manufacturing parts. Four wax samples were analyzed by thermogravimetric analysis, differential scanning calorimetry, viscometry, Fourier Transformed Infrared Spectroscopy, X-Ray Diffraction, Vickers micro-hardness testing, compression, and flexural testing. One sample was chosen with the most suitable properties for polymer composites and 3D printing filaments were produced.
      原文链接:
    • NSTL
    • Elsevier

    Rich variant phenotype of Gossypium hirsutum L. saturated mutant library provides resources for cotton functional genomics and breeding

    Wei Y.Liu Y.Ali A.M.Xiao R....
    15页
    查看更多>>摘要：? 2022 Elsevier B.V.Cotton is not only a raw material for the textile industry, but also an important strategic material. However, traditional breeding methods have narrowed the genetic diversity of current cotton cultivars. Abundant germplasm resources is a solid foundation for breeding, the use of chemical mutagenesis to create abundant mutation is of great significance to cotton breeding. This study used ethyl methanesulfonate (EMS) to mutagenize upland cotton material TM-1. First, we obtained a mutant library with abundant mutations and abundant phenotypes of the leaf, boll, locules numbers and plant architecture,. Second, based on the genome-wide analysis of the leaf and plant structure mutant., it showed that the library had a saturated genome mutations. Further GO and KEGG analysis showed SNPs were significantly enriched in DNA repair and response to hormone, non-homologous end joining (NHEJ) and homologous recombination (HR) pathways, which explained the mutated trait. In addition, we screened candidate gene (Gh_D05G364200) for crumpled leaf by BSA and transcriptome sequencing. Above all, the mutant library we obtained provides abundant resources for cotton functional genomics and breeding.
      原文链接:
    • NSTL
    • Elsevier