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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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    UV-activated oxygen scavenging system based on natural rubber latex from Hevea brasiliensis for active packaging applications

    Ramakanth, DakuriAkhila, KonalaGaikwad, Kirtiraj K.Maji, Pradip K....
    10页
    查看更多>>摘要：A novel oxygen scavenger based on natural rubber latex (NRL), photocatalytic system (PCS) comprising acetophenone and manganese chloride was developed and evaluated for its oxygen scavenging capacity and rate for the first time. The oxygen content (20.9%) in glass vials was reduced to 0% after 60 days and 20 days using NRL mixed with 3 wt% of PCS at 25 ? and 45 ? respectively. Colorimetry and Fourier transform infrared spectroscopy (FTIR) was performed before and after oxygen scavenging. The rheology along with particle size (399.6 nm) and zeta (-23.30 mV) was done to know viscosity and stability for the viability of NRL/PCS3 as active coatings in packaging applications. The prepared oxygen scavenging system showed an oxygen absorption capacity of 1045 mL O-2/g (at 25 ?) and a rate of 17.42, 52.25 mL O-2/g.day at 25 ? and 45 ? respectively. The rate constant value was increased to 0.4761 h(-1) from 0.2119 h(-1) when the temperature was raised from 25 ? to 45 ?. Hence, results proved that the NRL-based oxygen scavenging system with UV activation could be an effective alternative for iron-based commercial oxygen scavengers for foods that are moderate to highly susceptible to oxidation.
      原文链接:
    • NSTL
    • Elsevier

    Lignin-based thermo-sensitive hydrogel for selective recovery of butanol from dilute solution

    Li, HaoYang, HongdaDu, JingjingWang, Zhiying...
    11页
    查看更多>>摘要：Currently, biorefinery industry with biobutanol as product are firmly established in China. Corncobs are usually used as feedstock for Acetone-butanol-ethanol (ABE) fermentation. Cellulose and hemicellulose in corncobs could be used as raw materials for fermentation through enzymatic hydrolysis, but the lignin as a by-product has not been effectively used. Meanwhile, the low concentration of biobutanol in fermentation broth leads to highenergy consumption for separation. In this study, lignin obtained from corncobs was found to be a good material to prepare thermo-sensitive hydrogel for biobutanol enrichment, which has high adsorption capacity and unique desorption performance. By free radical polymerization, the excellent lignin-grafted-poly(N,Ndiethylacrylamide) hydrogel (LGD) was successfully prepared. The adsorption capacity of LGD for butanol (544.22 mg g-1) was two times and five times as much as lignin and poly(N,N-diethylacrylamide) (PDEAAm), respectively. The adsorbed saturated hydrogel could first remove a large amount of free water at 50 degrees C to reduce the energy consumed for free water vaporization. Further thermal desorption at 120 degrees C yielded a concentrated desorption solution with a concentration of 118.74 g L-1, which could significantly reduce the energy consumption of subsequent distillation. The aromatic ring and hydrophobic chain in lignin proved to be effective sites for butanol adsorption. PDEAAm not only promoted the effective exposure of adsorption sites on lignin, but also increased the adsorption rate significantly by forming a pore structure. With its high adsorption capacity, fast adsorption rate, and low energy consumption for desorption, the lignin-based thermo-sensitive hydrogels show good prospects for the enrichment of low-concentration biofuels obtained through biological fermentation. It also opens up a new way for efficient and full-component utilization of corncobs.
      原文链接:
    • NSTL
    • Elsevier

    Foliar and soil applications of nanosilicon affected the growth, metals accumulation, and volatile oils of Houttuynia cordata grown in contaminated soils

    Ma, HongliangHuang, YanjunWang, JiwenHu, Qianqian...
    9页
    查看更多>>摘要：Cadmium (Cd) and lead (Pb) are the most concerning heavy metals that can cause direct and indirect damage to humans, animals and plants. Thus, there is a need to reduce Cd and Pb accumulation in plants grown in Cd and Pb cocontaminated soils and ensure the quality and safety of foods and plant medicines. The objective of this study was to compare and evaluate the effects of foliar and soil applications of nanosilicon (nano-Si) on plant biomass, metal accumulation and volatile oils in Houttuynia cordata grown in Cd and Pb cocontaminated soil. The results showed that foliar and soil applications of nano-Si significantly increased Si concentration and the dry weight of roots, as well as shoots and leaves in Houttuynia cordata, whereas the Cd and Pb concentrations decreased obviously, except the Cd concentration in the roots. High doses of nano-Si were more effective in reducing Cd and Pb concentrations. Compared with soil application, foliar application of nano-Si was not only more effective but also more economical due to 85% less nano-Si application. In addition, the applications of nano-Si affected the volatile oils in H. cordata by increasing the contents of alkanes and aromatic compounds and reducing the ester contents. Overall, nano-Si foliar application was a suitable approach to simultaneously reduce both the Cd and Pb concentrations in plants grown in Cd and Pb cocontaminated soil by alleviating Cd and Pb toxicity in plant and increasing the plant growth and biomass.
      原文链接:
    • NSTL
    • Elsevier

    Dynamic transcriptome profiling revealed key genes and pathways associated with cold stress in castor (Ricinus communis L.)

    Wang, XiaoyuWu, YingSun, MengdiWei, Xue...
    14页
    查看更多>>摘要：Cold stress causes dwarfism in castor plants and delays development, such that the seeds can not fully mature before the frost occurs. However, little is known about the molecular regulatory mechanisms of cold tolerance in castor. In this study, Illumina RNA-sequencing (RNA-Seq) was used to monitor the dynamic transcriptome changes in the cold-tolerant variety Tongbi 5 when exposed to 4 degrees C for 0, 2, 6, or 8 h. A total of 75, 360, and 711 differentially expressed genes (DEGs) were identified after 2, 6, and 8 h of cold stress, respectively, with the number of upregulated DEGs being much greater than that of downregulated DEGs with the duration of cold treatments. Gene ontology (GO) analysis showed that the nucleus, regulation of transcription, transcription factor activity, DNA binding, metal ion binding, and ubiquitin-protein transferase activity were all enriched. Expression of almost all the transcription factors (TFs) were transcriptionally activated after cold treatment, exhibiting three expression patterns. Moreover, KEGG (Kyoto Encyclopedia of Genes and Genomes) analysis showed that DEGs were significantly involved in Ca2+ signal transduction and mitogen-activated protein kinase (MAPK) cascade pathways, plant circadian rhythm, regulation of autophagy, and plant hormone signal transduction. Combing the identified GO terms, KEGG pathways, and possible DEGs functions, we proposed a "trade-off " model between plant growth and cold tolerance in castor. This study expands our understanding of cold stress responses and provides the excellent gene resources for breeding cold tolerant castor varieties via genetic engineering.
      原文链接:
    • NSTL
    • Elsevier

    Genome-wide analysis R2R3-MYB transcription factors in Xanthoceras sorbifolium Bunge and functional analysis of XsMYB30 in drought and salt stresses tolerance

    Li, JingbinZhou, HuiXiong, ChaoweiPeng, Zijia...
    14页
    查看更多>>摘要：Xanthoceras sorbifolium Bunge, commonly called yellowhorn, is a unique woody oil plant and virescence forestation trees species with environmental stress tolerance in northern China. The R2R3-MYB transcription factor family plays a critical role in the response of plants to abiotic stress. Until now, genome-wide identification and characterization of yellowhorn R2R3-MYB genes has not been elucidated. In this study, 126 putative R2R3-MYB genes were found in the yellowhorn genome. The phylogenetic analysis showed yellowhorn R2R3-MYBs and Arabidopsis R2R3-MYBs were clustered into 33 subgroups, and 28 subgroups of them included members from 2 species, while 4 subgroups were specific to one species. A total of 9 and 34 gene pairs were found to have tandem duplication and segmental duplication events, the latter might have been the main contributor to the expansion of yellowhorn R2R3-MYB genes. Moreover, the promoter region of these gene contains multiple cis-acting regulatory elements involved in plant adversity and phytohormone responses. Subsequently, we cloned XsMYB30 gene and its expression was strongly upregulated by treatment with drought, salt, ABA, MeJA and SA. Silencing of XsMYB30 markedly weakened tolerance to both drought and salt stresses, probably because of more ROS production and MDA content but less antioxidative enzyme activities, proline and ABA are accumulated in the silenced plants. Furthermore, silencing of XsMYB30 decreased the expression levels of several stress-related genes involved in encoding the key enzymes in ROS-scavenging system, proline biosynthesis and ABA signaling pathway after stress treatments. Our findings provide important information for future research on the function and regulation mechanisms of yellowhorn R2R3-MYB transcription factors.
      原文链接:
    • NSTL
    • Elsevier

    Ozone pretreatment facilitating cellulase hydrolysis of unbleached bamboo pulp for improved fiber flexibility

    An, XingyeZhang, RunqingLiu, LiqinYang, Jian...
    11页
    查看更多>>摘要：In this study, an integrated and feasible approach by combining ozone pretreatment and cellulase hydrolysis of unbleached bamboo kraft pulp (UBKP) to improve the fiber flexibility was proposed. Ozone was utilized as green facilitator of cellulase treatment for increased enzyme accessibility and improved fiber flexibility by removing lignin and particle carbohydrates. Ozone was found to decrease the fiber stiffness and reduce the lignin content of UBKP fibers from 14.46 wt% to 9.96 wt%. The DP of UBKP was also decreased to 1210 after ozone-cellulase treatment, with a reduced carboxyl content of 0.064 mmol/g. The flexibility of UBKP fibers treated by ozone-cellulase system was 34.68 x 10(14)/(N.m(2)), which was 7 times higher than that of the original UBKP fibers. This study put forward a practical and sustainable approach to improve the flexibility of UBKP fibers, and to further study the possibility of ozone oxidation chemistry in cellulase hydrolysis process, thus would further broaden the high-value application of UBKP and ozone technology in tissue paper production.
      原文链接:
    • NSTL
    • Elsevier

    Boosting Portland cement-free composite performance via alkali-activation and reinforcement with pre-treated functionalised wheat straw

    Chougan, MehdiGhaffer, Seyed HamidrezaSikora, PawelMijowska, Ewa...
    12页
    查看更多>>摘要：Utilising wheat straw reinforced OPC-free composites in the construction industry requires efficient, eco-friendly pre-treatment coupled with surface functionalisation methods to turn it into a high-performance material. Herein, alkali-activated material (AAM) was used as an OPC-free matrix, while eco-friendly hybrid pre-treatment and surface functionalisations were applied to mitigate the surface quality deficiencies of wheat straw and improve its compatibility with low-carbon binders. Wheat straw particles were subjected to a mild physical pretreatment (hot-water followed by steam) and surface functionalisation using attapulgite nanoclay and graphene nanoplatelets to improve their capacity as an effective reinforcing material in AAM. Comprehensive characterisation verified successful pre-treatment and surface functionalisation, which led to the improved interfacial bond between wheat straw and AAM. The best results were obtained for the AAM samples reinforced with pretreated straw that was functionalised with attapulgite nanoclay (i.e., H+S-AT), in which the volume of permeable voids decreased by 18%, while compressive and flexural strength at 90 d increased by 41% and 27%, respectively, compared to the control sample. However, the effect on the thermal properties of the resulted composites was not significant.
      原文链接:
    • NSTL
    • Elsevier

    Comparative transcriptome study of the elongating internode in elephant grass (Cenchrus purpureus) seedlings in response to exogenous gibberellin applications

    Yan, QiLi, JieLu, LiyanYi, Xianfeng...
    12页
    查看更多>>摘要：Bioenergy grass provides an important biomass resource for biofuel production worldwide. The internode elongation of grass stems is central to biomass production for biofuels; however, this process is poorly understood in elephant grass because it is a complex trait regulated by many genes. In this study, we adopted phenotypic, histological, transcriptomic, and phytohormone methods to investigate the regulatory mechanisms of internode elongation mediated by gibberellin (GA) in a dwarf cultivar and a standard cultivar. Phenotypic analysis revealed that exogenous GA(3) increased plant height by inducing both internode length and internode number in two cultivars with contrasting internode lengths. Histological analysis revealed that the GA(3) application increased the internode elongation through inducing both cell division and cell elongation. Phytohormone analysis indicated that exogenous GA(3) treatment significantly increased endogenous indole-3-acetic acid (IAA), and zeatin (ZR) contents but decreased abscisic acid (ABA) contents, while the expression levels of genes related to hormone metabolism and signaling were substantially changed. Consistent with the expression pattern, a significant increase in lignin and cellulose content were also observed after GA(3) treatment. Genes and transcription factors related to hormone metabolism and signaling, cell division, cell wall biosynthesis, and plant growth were identified as hub genes in the core coexpression network of the response to GA(3) application. This study showed that active cell division, cell elongation, and cell wall biosynthesis contribute to internode elongation following exogenous GA(3) applications and identified hub genes for these complex regulatory networks. These data elucidate mechanisms governing internode elongation in elephant grass and help breeders to develop elite cultivars with high biomass.
      原文链接:
    • NSTL
    • Elsevier

    Selective production of lignin-derived monomers from corn stover by tuning the acid and hydrogenation sites of aluminum phosphate catalysts

    Li, WenzhiLi, XuZhang, Baikai
    9页
    查看更多>>摘要：This work is dedicated to the selective conversion of lignin. A nickel, tin, and sulfur-doped aluminum phosphate zeolite catalyst was developed for the selective production of lignin-derived monomers. The acidity and hydrogenation sites of this catalyst can be flexibly adjusted, and it exhibits a high yield (26.7%) for monomers with a nearly 68.8% conversion of lignin at 235 degrees C. The results show that Bronsted acid can increase the conversion of lignin and has a high selectivity for trans-ferulic acid, while Lewis acid and hydrogenation sites can promote the production of monomers with low oxygen content. The excellent stability and simple preparation method provide the possibility for the application of this depolymerization technology. This work could be a reference for the development of lignocellulosic biomass.
      原文链接:
    • NSTL
    • Elsevier

    Experimental analysis of Sterculia foetida biodiesel and butanol blends as a renewable and eco-friendly fuel

    Devarajan, YuvarajanMunuswamy, Dinesh BabuNalla, Bhanu TejaChoubey, Gautam...
    7页
    查看更多>>摘要：The current research intended to investigate the performance, emission and combustion characteristics of Sterculia foetida biodiesel blending with n-butanol at two different proportions (5% and 10%). The non-edible nature of the Sterculia foetida kernel oil favored choosing as feedstock. It comprises more than 70% of sterculic acid, a cyclopropane ring in its chemical structure. The base-catalyzed transesterification process converted Sterculia foetida kernel oil into biodiesel. The n-butanol additive was added in 5% & 10% volume as an oxygenated fuel to S. foetida / diesel blends for reducing emissions and improving thermal efficiency. Investigations revealed that brake thermal efficiency was improved by adding n-butanol in the blends compared with 20% S. foetida biodiesel + 80% Diesel. The emissions such as carbon monoxide, smoke opacity and hydrocarbons have significantly reduced vis-a-vis standard diesel. The oxides of nitrogen (NOX) and carbon dioxide (CO2) decreased relative to 20% S. foetida biodiesel + 80% Diesel. The analysis in combustion registered an improvement for butanol/diesel/biodiesel blends relative to S. foetida biodiesel owing to the innate content of oxygen in Heat Release Rate and In-Cylinder Pressure. Hence the addition of butanol with S. foetida biodiesel appears as a good substitute for straight diesel.
      原文链接:
    • NSTL
    • Elsevier