首页期刊导航|Industrial Crops and Products
期刊信息/Journal information
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
正式出版
收录年代

    Optimization of extraction and purification processes of six flavonoid components from Radix Astragali using BP neural network combined with particle swarm optimization and genetic algorithm

    Xu, ShouchaoWan, HaitongZhao, XixiZhang, Yangyang...
    14页
    查看更多>>摘要：Background: Radix Astragali (RA), as food and traditional Chinese medicine, has been used for a long history in China. However, few studies on the extraction and purification of the active components from RA have been reported. Thus, the optimal extraction and purification conditions of six flavonoid components (calycosin, calycosin-7-glucoside, formononetin, ononin, 7,2'-dihydroxy-3',4'-dimethoxyisoflav 7-O-glucoside, and 9,10-dimethoxyptercarpan-3-O-beta-D-glucoside) from RA were investigated in this study. Methods: BP neural network combined with particle swarm optimization and genetic algorithm (PSO-GA-BPNN) was used to analyze the relations between the extraction/purification conditions and the response value, and search the optimal extraction/purification conditions. Response surface methodology (RSM) was performed simultaneously as a comparison. Furthermore, the DPPH center dot radical scavenging activity and hydroxyl radical scavenging activity of crude extract and purified extract were detected. Result: A three-layer PSO-GA-BPNN containing 3 input neurons, 3 hidden layer neurons and 1 output neuron was established to investigate the relationship between the extraction/purification conditions and the response value. For extraction, the optimal condition by PSO-GA-BPNN was as follow: ethanol concentration 54%, extraction time 254 min, and solid-to-liquid ratio 18 mL/g. Using the optimal condition, the yield of six components was 2.084 mg/g, which was greater than 1.915 mg/g optimized by RSM. For purification, among nine types of macroporou resins, CAD-40 with higher adsorption ratio and desorption ratio was selected to purify the extract. The optimal adsorption condition by PSO-GA-BPNN was as follow: pH 6.9, adsorption flow rate 1.6 mL/min and solution concentration 0.22 g/mL, while the optimal desorption condition by PSO-GA-BPNN was as follow: ethanol concentration 55%, desorption flow rate 1.5 mL/min and elution volume 8.5 BV. Under the optimal condition, the adsorption capacity and desorption capacity were 1.465 mg/g and 1.259 mg/g, respectively, which were better than 1.381 mg/g and 1.156 mg/g optimized by RSM. These optimal values obtained by PSOGA-BPNN were significant increased compared with these by RSM according statistical analysis. The antioxidant test showed that the purified extract has better antioxidant activity. Conclusion: These results indicate that PSO-GA-BPNN model was more appropriate and has better indicative value for extraction than RSM, while the same as for purification. Consequently, PSO-GA-BPNN model combined with MPR purification enhanced the antioxidant potential of the RA from this medicinal species.
      原文链接:
    • NSTL
    • Elsevier

    Kapok leaves extract and synergistic iodide as novel effective corrosion inhibitors for Q235 carbon steel in H(2)SO(4 )medium

    Wan, ShanZhang, TianChen, HuikaiLiao, Bokai...
    10页
    查看更多>>摘要：The kapok leaves were extracted via absolute ethyl alcohol in a Soxhlet extractor. The acquired kapok leaves extract (KLE) and synergistic iodide ions are firstly used as novel environmental-friendly corrosion inhibitors for Q235 carbon steel in 0.5 mol/L H2SO4 solution. The corrosion inhibition performance was researched by electrochemical tests and surface analysis. Results indicated that the KLE and I- inhibitors exhibit a mixed anodic and cathodic inhibition behavior and outstanding inhibition efficiency of 95%. Moreover, it still achieves more than 90% inhibition efficiency after 72 h long-term immersion in sulfuric solution. The adsorption on the carbon steel surface obeys the Langmuir adsorption isotherm model involving physisorption, and the inhibition efficiency decreases with an elevated temperature. The synergistic inhibition mechanism of KLE and I- inhibitors is further revealed.
      原文链接:
    • NSTL
    • Elsevier

    An efficient strategy to degrade lignin by a novel endophytic fungus Chaetomium globosum combined with ultrasound

    Zhao, ChunjianLiu, ZhiguoGu, ChengboFu, Yujie...
    11页
    查看更多>>摘要：Green biological pretreatment of lignocellulose is the critical step in the degradation of biomass in the sustainable economy for biofuels and bio-based chemicals. In the present study, a novel laccase-producing endophytic fungus Chaetomium globosum was screened out from the flower of Hibiscus manihot L. in combination with ultrasound to improve the degradation of lignin in larch sawdust. Under the optimized conditions with the material to liquid ratio 1:20, temperature 30 degrees C, time 4 days, pH 7, the ultrasonic power 200 W, time 20 min, the degradation rate of lignin reached 34.29%, which increased 1.5-fold and 2-fold higher than that of fungus and ultrasonic treatment correspondingly. In addition, SEM and FTIR analysis showed that the combined treatment changed the surface morphology and chemical structure, and found that mycelium colonized in the interior of sawdust. Analysis of three types of lignin contents showed that the contents of p-Hydroxyphenyl and Guaiacyl increased from 0.46 to 0.70 mg/g and from 9.31 to 11.87 mg/g, while the contents of Syringyl propane did not change significantly, the results indicated that laccase from Chaetomium globosum might have special selectivity. After docking the three lignin monomers and laccase molecules, it was found that the hydroxyl group of Coniferyl alcohol was formed by the active groups of GLU-460 and SER-113 amino acids. The hydrogen bond distances were 1.8 angstrom and 2.2 angstrom, which were far smaller than the traditional hydrogen bond of 3.5 angstrom, this indicated that the compound binds strongly to the protein. The benzene ring of Sinapyl alcohol contained two methoxy groups increasing the molecular volume and hydrophobicity, which reduced laccase's ability to oxidize phenols. In general, as indicated by the results of this study, the novel endophytic fungus Chaetomium globosum from Hibiscus manihot L. has great potential to selectively degrade lignin in larch sawdust.
      原文链接:
    • NSTL
    • Elsevier

    A wood-based fluid catalytic reactor with directional channels and porous inner walls for efficient degradation of 4-NP by immobilized laccase

    Shen, Yu-ShiYao, Xiao-HuiHe, Chen-XiHu, Run-Ze...
    10页
    查看更多>>摘要：Modern bioreactors primarily focus on fixing enzymes on materials to form fixed bed reactors, but the reaction efficiency is unstable. More importantly, the enzymes easily fall off or even inactivate, and the fluid risks leaking due to excessive pressure during flow. In this study, a directional channel continuous microfluidic reactor with laccase covalently immobilized in the internal channel is made from natural wood. After dimethylacetamide/ lithium chloride (DMAc/LiCl) treatment of delignified wood, the micropores (ray cells, pits and nanopores) in directional channel walls are fully exposed. When the fluid passes through, the turbulence near the pits increases, resulting in good mass and heat transfer, which enhances the catalytic efficiency of laccase. The reactor has good stability and maintains more than 80% substrate conversion in the pH range of 3-7 and the temperature range of 15-55 celcius. In the degradation of 4-nitrophenol (4-NP), a 94.42% degradation rate is achieved in only 30 min, and 86.93% efficiency is maintained after 25 cycles of catalysis, indicating its excellent reusability. The directional reactor with porous inner walls is simple to prepare and easy to scale up, which provides excellent convenience for continuous industrial production and shows great commercial application potential.
      原文链接:
    • NSTL
    • Elsevier

    Single cell oil production from hydrolysates of alkali pre-treated giant reed: High biomass-to-lipid yields with selected yeasts

    Cianchetta, StefanoPolidori, NakiaVasmara, CiroCeotto, Enrico...
    14页
    查看更多>>摘要：Single cell oil (SCO) produced by oleaginous yeasts represents an intriguing source for second generation biofuels or other biobased oleochemicals. This study aimed at improving SCO production from giant reed (Arundo donax L.). Five different yeast species were used to evaluate the lipid yield and fatty acids profile obtained in six media prepared with two enzymatic hydrolysates of mild alkali pre-treated giant reed fibers (washed or not after filtration) and variable nitrogen supplementation (three levels). After pre-treatment and hydrolysis, up to 489 +/- 9 mg of reducing sugars per g of initial untreated biomass were obtained. C/N ranged widely (38-258) among the different formulated media, depending on both washing and nitrogen supplementation, and strongly affected SCO accumulation by most of the strains. Lipomyces starkeyi, Rhodosporidiobolus azoricus, and Cutaneotrichosporon oleaginosum reached the highest lipid contents (54-68%) and concentrations (4.8-5.6 g/L). The highest lignocellulosic biomass-to-lipid conversions were obtained with C. oleaginosum, R. azoricus, and L. starkeyi (102 +/- 9, 95 +/- 9, and 89 +/- 3 mg of lipids per g of untreated giant reed biomass, respectively). Oleic, palmitic, linoleic, and stearic acid were predominant in the fatty acids profile, similarly to seed oils. In conclusion, hydrolysates derived from the alkali pre-treated biomass of giant reed are suitable to obtain high lipid yields with selected yeasts, to be used for the biobased industry.
      原文链接:
    • NSTL
    • Elsevier

    Sotol bagasse (Dasylirion sp.) as a novel feedstock to produce bioethanol 2G: Bioprocess design and biomass characterization

    Gonzalez-Chavez, Jesica de JesusArenas-Grimaldo, ChristianAmaya-Delgado, LorenaVazquez-Nunez, Edgar...
    13页
    查看更多>>摘要：Sotol (Dasylirion spp.) is a plant endemic to northern Mexico used since ancient times by North American Indians. In the present research, we studied the transformation of lignocellulosic Sotol Bagasse (SB) components as a feedstock for bioethanol 2G production. For this purpose, SB was pretreated with diluted acid (AP) and alkali (BP). In AP, biomass was exposed to different acid concentrations and reactions proceeded at different times according to a 3(2) experimental design. BP was performed by stirring SB with a 3 M NaOH solution at 30 degrees C and 120 rpm for 6 h. Pretreated samples were hydrolyzed using the Cellic CTec2 (R) enzyme complex. These experiments were performed at the micro-level. Two conditions presented the best performance: AP1 (0.5% v/v acid; 15 min; 121 degrees C) and AP2 (1% v/v acid; 30 min; 121 degrees C). Then, AP1 and AP2 were selected for process scale-up, resulting in RS yields of 22.4% and 19.46%, respectively. The sugars produced were fermented in presence of Kluyveromyces marxianus producing an 81.85% ethanol yield. Data indicated that fermentation of SB treated with AP1 produced ethanol. In addition, fermentation of SB pretreated with AP2 generated ethanol and low concentrations of iso-butanol, acetaldehyde, and isoamyl alcohol. Ethanol and energy yield of AP1 treated biomass were 0.19 L bioethanol and 4.09 MJ per kg SB. These results proved that the proposed process is sustainable and can potentially be used for bioethanol 2G production using SB. As a result, circular bioeconomy will be stimulated.
      原文链接:
    • NSTL
    • Elsevier

    Comparing the effect of Thymus spp. essential oils on Candida auris

    Ribeiro, RitaFernandes, LilianaCosta, RaquelCavaleiro, Carlos...
    6页
    查看更多>>摘要：Candida auris is an emergent yeast pathogen responsible for many invasive fungal infections due to its multidrug-resistant character and its huge transmission ability. Essential oils (EOs) obtained from several aromatic plants have been regarded as an alternative treatment upon to fungal infections. For example, Thymus spp. are known by their antifungal effect due to the presence of some volatile compounds in their EOs, such as carvacrol, thymol, linalool and gamma-terpinene. So, the main goal of this work was to compare the effect of several EOs from Thymus spp. on C. auris biofilm. The antifungal activity of Thymus vulgaris, Thymus zygis, Thymus satureioides and Thymus mastichina against planktonic cells of C. auris NCPF 8971 was assessed by agar disk diffusion method. The effect of these EOs with direct or vapour phases on preformed biofilms was evaluated by colony-forming units' enumeration. Importantly it was noticed a completely different range of action between the EOs from the same genus. While T. vulgaris showed the biggest antifungal effect with a halo of 59.75 +/- 15.75 mm, T. mastichina for the other side, presented a halo of 13.13 +/- 1.36 mm, showing a very low activity. In addition, the direct application of T. vulgaris and T. zygis EOs demonstrated higher antifungal activity against C. auris biofilms than vapour phase application. However, T. vulgaris also showed significant action in the vapour phase mode. The chemical composition of Thymus EOs was analysed by GC and GC-MS, and was demonstrated that they have different chemical profiles, namely in the amount of phenolic compounds, which justify the different antifungal actions. In conclusion, T. vulgaris and T. zygis oils, can be pointed out as a great contribution to the treatment of C. auris infections, being promising alternatives to conventional therapy. However, the efficiency of the EOs differs substantially between the four species of Thymus. Therefore, the selection of natural therapies should always have in account EOs composition.
      原文链接:
    • NSTL
    • Elsevier

    Changes in the essential oil, fixed oil constituents, and phenolic compounds of ajowan and fenugreek in intercropping with pea affected by fertilizer sources

    Chiyaneh, Satar FotohiRezaei-Chiyaneh, EsmaeilAmirnia, RezaAfshar, Reza Keshavarz...
    11页
    查看更多>>摘要：Intercropping systems combined with the application of organic and biofertilizers can create more sustainable and cleaner plant production systems. This study investigated the effect of organic/biofertilizers and intercropping patterns on the seed yield of ajowan (Carum copticum L.), fenugreek (Trigonella foenum-graecum L.), and pea (Pisum sativum L.) and the essential oil and fatty acid profiles and phenolic compounds of the two medicinal and aromatic plants. The five fertilizer treatments were: no fertilizer (control), 100% chemical fertilizer (NPK), 50% chemical fertilizer+ 100% biofertilizer (CH+B), 50% chemical fertilizer + 100% humic acid (CH+H), and 100% biofertilizer + 100% humic acid (B+H). The six intercropping treatments were ajowan pure stand (Aps), fenugreek pure stand (Fps), pea pure stand (Pps), intercropping one row each of fenugreek + ajowan + pea (1 F:1 A:1 P), intercropping two rows each of fenugreek + ajowan + pea (2 F:2 A:2 P) and intercropping three rows each of fenugreek + ajowan + pea (3 F:3 A:3 P). The results showed that pure stands with CH+H fertilizer produced the highest seed yields for ajowan, fenugreek, and pea, being 29%, 25%, and 30% higher than the unfertilized control. The 2 F:2 A:2 P intercropping ratio fertilized with CH+H had the highest concentrations of ajowan essential oil (3.9%) and main chemical constituents, including thymol (51.3%) and p-cymene (19.6%). The main oil chemical constituents of ajowan included petroselinic acid (69-75.7%) oleic acid (18-23.9%), and palmitic acid (2.1-5.2%). The main chemical constituents of fenugreek oil were linoleic acid (32.4-38.9%), oleic acid (18-24.3%), linolenic acid (16.1-20.9%), and palmitic acid (7.2-14.1%). The 2 F:2 A:2 P intercropping ratio fertilized with CH+H and CH+B had the highest concentrations of coumaric and rosmarinic acids in ajowan and fenugreek, respectively. The results suggest that the 2 F:2 A:2 P intercropping ratio combined with chemical and organic fertilizer application is a more sustainable and cleaner strategy for improving secondary metabolites and fatty acid profiles in ajowan and fenugreek than pure stands.
      原文链接:
    • NSTL
    • Elsevier

    Construction of a novel B/N/Si synergistic flame retardant system and its application on cotton fabric

    Kong, DezhengChen, HongfeiWang, ZhengLu, Zhou...
    10页
    查看更多>>摘要：In view of the fact that a large number of fire accidents are directly or indirectly caused by cotton fabrics every year, it is extremely urgent to endow cotton fabrics with flame retardant properties. A neotype boron-nitrogen silicon synergistic flame retardant BTDU-PTMS was successfully synthesized and applied to cotton fabric. The morphology and elemental changes were determined by SEM-EDX, which proved that BTDU-PTMS was successfully finished on cotton fabric. The flame retardancy was assessed by LOI and vertical combustion test, when the weight gain (WG) was 30%, the LOI value of 32.7% with char length of 85 mm can be achieved. The thermal stability of samples was researched by TG analysis, and the char residue can reach 35.85% in the nitrogen atmosphere. The combustion action was evaluated by cone calorimetry test. With the WG was 20%, the TSP decreased by 43.3%, showing excellent smoke suppression ability. Eventually, the possible flame retardant mechanism was discussed, demonstrating BTDU-PTMS was a solid-gas two-phase flame retardant.
      原文链接:
    • NSTL
    • Elsevier

    Porous biomass foam of polypyrrole-coated cattail fibers for efficient photothermal evaporation

    Sun, YanFan, LinglingLin, XiulingFeng, Changqi...
    11页
    查看更多>>摘要：Solar-driven interfacial water evaporation has become a prospective approach for freshwater production, desalination, and sewage treatment via efficient photothermal conversion. Nevertheless, the development of high-performance, low-cost and environment-friendly solar evaporator is still a major challenge. In this work, a three-dimensional porous solar evaporator is proposed based on polypyrrole (PPy) decorated cattail fiber (CF) foam. The CF foam exhibits superior water transport capacity owing to the unique grooved structure of the cattail fiber. The as-prepared PPy@CF foam shows low thermal conductivity, good salt resistance, and superior light absorption of -97% in a wide wavelength region (300-2500 nm) after the introduction of PPy coating. The PPy@CF foam exhibits a vapor evaporation rate of 1.678 kg m(-2) h(-1) as well as a photothermal conversion efficiency of 99.6% under one sun illumination. In addition, the PPy@CF foam may be applied for clean water production from seawater and sewage with prominent rejection of ions and dye. The present work demonstrates the excellent potential of the PPy@CF foam as an economical biomass material for high-performance solar evaporators.
      原文链接:
    • NSTL
    • Elsevier