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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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    Elevated nighttime temperature affects fiber bundle strength via altering cellulose deposition rate during early fiber development

    Wu, YanqinTian, JingshanZhang, XuyiHu, Xiaobing...
    7页
    查看更多>>摘要：The Xinjiang Region is China's major concentrated cotton growing area. But nighttime temperature during the late growing season is a crucial factor affecting fiber quality, especially fiber bundle strength. The objective of this study was to determine the effects of nighttime temperature on fiber bundle strength and cellulose deposition via elevating nighttime temperature at different fiber development stages. The results indicated that elevated nighttime temperature from anthesis to the boll opening stage (Na) significantly advanced the time of cellulose deposition, the onset time and termination time of rapid cellulose deposition were all significant by 4.5 d in advance, and the deposition rate (V1) significant was increased by 0.65%/d in the initial period from anthesis to the onset of rapid cellulose deposition. And these resulted in an increase of fiber bundle strength. When nighttime temperature was elevated either from anthesis to the onset of rapid cellulose deposition (N1) or between the onset and termination of rapid cellulose deposition (N2), it had a significantly shorter duration of rapid cellulose deposition by 3.6-5.7 d, and the deposition rate of rapid cellulose deposition significantly increased by 0.8-1.0%/d. Compared with N1, the V1 was significantly reduced by 7.9% and the maximum cellulose content was increased by 7.3% in N2. Fiber bundle strength was significantly increased at the N2, but significantly decreased by 1.3 cN/tex at the N1. Elevated nighttime temperatures from the termination of rapid cellulose deposition to boll opening (N3) had no significant effect on fiber bundle strength or cellulose deposition characteristics. In conclusion, the effects of nighttime temperature on fiber bundle strength mainly depended on the average cellulose deposition rate from anthesis to the onset of rapid cellulose deposition (V1).
      原文链接:
    • NSTL
    • Elsevier

    T enzymatic esterification of naringin and the properties of naringin esterified derivatization

    Guo, HuiYu, JianweiLei, BingshuangJi, Weiwei...
    13页
    查看更多>>摘要：As a kind of important natural compound with various physiological activities such as anti-oxidation, anti-inflammation, anti-aging, anti-cancer, anti-virus, etc, flavonoid had great application potential in food, cosmetics and pharmaceutical industries. However, the poor solubility limited their application. To solve this problem, one flavonoid glycoside, naringin, was esterified with lipase to improve its performance in the paper. Four fatty acids were selected as acyl donors to be esterified with naringin by single factor experiment, respectively. The results indicated that the optimal reaction conditions were the same: water activity was between 0.11 and 0.69, TLIM lipase was 50 mg/mL, acetone was used as the solvent, the molar ratio of substrate (naringin: fatty acid) was 1:10, and the substrates were first pretreated by ultrasound for 0.5 h, then reacted at 50 degrees C for 16 h. The conversion rates of naringin esterified with different fatty acids were all above 80.0%. Furtherly, the conversion rate of naringin was 93.9%, after the response surface experiment was carried out to optimize the lipase-catalyzed reaction conditions of naringin with palm oil. Lipophilicity and antioxidant ability of naringin esterified de-rivatives were measured. The results showed that the lipophilicity of naringin esterified derivatives was signif-icantly higher than that of naringin. Although the free radical scavenging ability and reducing ability decreased by approximately 8% and 0.8%, respectively, the inhibiting oil peroxidation ability of naringin fatty acid esters were higher than that of naringin, which indicated that naringin esterified derivatives have the potential to become fat-soluble antioxidants.
      原文链接:
    • NSTL
    • Elsevier

    Production of herbal nanocolloids from Rubia tinctorum L. roots by rapid expansion from supercritical solution into suspension system

    Yekefallah, MiladRaofie, Farhad
    11页
    查看更多>>摘要：The current study was done to confirm the existence of stable nanoparticles of phyto-compounds, such as alizarin, lucidin, and rubiadin from Rubia tinctorum L. roots by employing the supercritical procedure. These compounds have a low bioaccessibility since; they are rarely soluble in aqueous media. Hence, preparation of a stable colloid of herbal extract in a nano suspension system can resolve this problem by reducing particle size. Moreover, central composite design (CCD) was exploited for analyzing the effect of pressure, CO2 flow rate, modifier volume, and oven temperature on antioxidant activity index (AAI) following application of supercritical procedure. Furthermore, dynamic light scattering (DLS), field-emission scanning electron microscopy (FESEM), energy-dispersive X-ray spectroscopy (EDS), and liquid chromatography-mass spectrometry (LCMS) techniques were utilized to appraise properties of the prepared nanocolloids. Based on the results, demeanor of the particles changed after particle creation, demonstrating that the supercritical procedure results in the diminished accumulation of the particle and raising AAI for the extract. Hence, bioaccessibility of medicinal herb can be significantly enhanced in biological media and in -vitro testing determined their valuable antioxidant properties by comparison with standards and classifications.
      原文链接:
    • NSTL
    • Elsevier

    Response surface methodology and artificial neural network modeling for optimization of ultrasound-assisted extraction and rapid HPTLC analysis of asiaticoside from Centella asiatica

    Kumari, PoonamKaur, PrabhjotKumar, VijayPandey, Babita...
    10页
    查看更多>>摘要：The present study optimizes various extraction conditions for better yield of asiaticoside in Centellaasiatica. Response surface methodology (RSM) and artificial neural network (ANN) were used for the first time here in order to model and optimize the ultrasonic extraction parameters of asiaticoside from C.asiaticaleaves for comparing and establishment of effective prediction models.The quantitative determination of asiaticoside was carried out on silica gel 60 F254HPTLC plates by using the mobile phase consisting of butanol: ethyl acetate: water (4:1:5). The optimum sonication parameters solid:solvent ratio (1:15), sonication time (18 min), solvent composition (35% aqueous-ethanol), the experimental maximum yield obtained for asiaticoside were 0.198% and the maximum predicted yield were found to be 0.201% i.e closely related to the experimental yield. The results showed that RBF gives better performance as compared to MLP and RSM. The study suggests that RSM and ANN model system can be manipulated for the optimization and production of valuable bioactive compounds.
      原文链接:
    • NSTL
    • Elsevier

    Hydrogen cyanamide enhances flowering time in tea oil camellia (Camellia oleifera Abel.)

    Lin, MengfeiWang, SuLiu, YingyingLi, Juncheng...
    13页
    查看更多>>摘要：Appropriate flowering time is one of the most important traits for oilseed production and crop yield in tea oil camellia (Camellia oleifera Abel.). It secures the availability of pollinators and balances the growth period after flowering with respect to cold winter temperatures and rainfall. However, the effective regulator of flowering time and its mechanisms in C. oleifera are not clearly understood. This study demonstrates that hydrogen cyanamide (HC), rather than gibberellin A(3), gibberellin A(4+7), thidiazuron, or 6-benzylaminopurine, acts as a potentially effective agent to promote flowering time by similar to 12 days. Accumulation of indole acetic acid, ethylene, salicylic acid, and reactive oxygen species (ROS) in floral buds of C. oleifera was significantly increased by HC treatment. Transcriptome analysis suggested that exogenous HC application promoted flowering via regulating genes involved in auxin metabolism, ethylene-MAPK (mitogen-activated protein kinase) signaling, and ROS metabolism. These results demonstrate that HC can advance flowering by enhancing cell expansion, cell cycle progression, and flower development in floral buds. These findings help understand the role of HC in flowering regulation in autumn/winter-flowering perennials and provide new insights into the potential utilization of HC as a flower inducer in C. oleifera cultivation.
      原文链接:
    • NSTL
    • Elsevier

    A suspension culture of the hormone autotrophic cell line of Aralia elata (Miq.) Seem. for production of oleanolic acid and flavonoids

    Sui, YueJia-Xi LiuZhao, YueWen-Hua Guo...
    8页
    查看更多>>摘要：The hormone autotrophic cell (HAC) line of Aralia elata grows quickly in vitro without a plant-growth regulator and is thus a potential platform cell line for high-value metabolite production. In this study, a suspension culture of this HAC line was established by optimizing the concentration of sucrose (30-90 g/L), the inoculation amount, and the strength of the Murashige and Skoog (MS) medium. Then, different concentrations of the elicitors methyl jasmonate (MJ; 0, 50, 100, 250, and 500 mu mol/L) and salicylic acid (SA; 0, 10, 25, 50, 100 and 250 mg/L) were used to improve its oleanolic acid accumulation, and the precursors phenylalanine, sodium acetate, and cinnamic acid were screened to enhance flavonoid accumulation. The optimal conditions for HAC line growth were 1.0 g HACs suspended in 100 mL liquid MS medium (in a 250-mL flask) with the addition of 70 g/L sucrose, and the time-points for the highest accumulations of oleanolic acid and total flavonoids were 18 and 21 days, respectively. The treatment of HACs with 250 mu mol/L MJ for 6 days or 25 mg/L SA for 3 days improved oleanolic acid accumulation efficiency by 1.597-times (12.065 mu g/d) and 3.59-times (22.860 mu g/d) that of the control, respectively. The most effective concentrations of the three precursors were 50 mg/L for phenylalanine and sodium acetate, and 5 mg/L for cinnamic acid. Of these, sodium acetate treatment for 14 days proved most effective, providing a total flavonoids content (4.124 mg/L) 1.87-times that of the control and an accumulation efficiency 2.37-times that of the control. Therefore, the most effective treatments for HACs after 10 days of culturing were 25 mg/L SA for 3 days and 5 mg/L sodium acetate for 14 days, which improve the accumulations of oleanolic acid and total flavonoids, respectively.
      原文链接:
    • NSTL
    • Elsevier

    Identification of potential accessions of Bacopa monnieri L. for herbage yield and bacosides A content

    Damor, Hiteksha, ISaran, Parmeshwar LalLodaya, Darshan H.Suthar, Manish Kumar...
    8页
    查看更多>>摘要：Bacopa monnieri is well recognized medicinal herb for promoting mental strength, longevity, life energy, and sleep. Conservation and cultivation of overexploited species like Brahmi are the key factors for the restoration of diversity. The diversity in species can be implied to screen the elite accessions. Morphological, chemical, and genetic parameters of five elite accessions were studied and evaluated for sustainable cultivation as well as in-dustrial uses. The evaluated accessions varied in quantitative, qualitative, and molecular characters. Accession DBM-5 (Directorate Bacopa monnieri-5), exhibited maximum herbage yield, while the accession DBM-4 was rich in Bacoside A content. DBM-2, DBM-4, and DBM-5 accessions were most diverse, therefore, can be used in crop improvement programs. Overall, DBM-4 is suitable accession for commercial cultivation as an alternative to traditional rice-wheat cropping system under low-lying conditions. The accession DBM-4 is also suitable for product development or pharmaceutical industries due to rich quality parameters viz., total chlorophyll, ca-rotenoids, bacosides A content, low in drying/ash, and high in water and alcohol extractive.
      原文链接:
    • NSTL
    • Elsevier

    Flexible conductive gasket based on Eucommia ulmoides gum and carbon fillers

    Yue, PanpanLeng, ZejianRao, JunChen, Gegu...
    9页
    查看更多>>摘要：Eucommia ulmoides gum (EUG) is an eco-friendly and biodegradable novel polymer having the characteristics of both rubber and plastic, which shows excellent potential for conductive gasket material. A flexible, lightweight, and biodegradable EUG-based/carbon fillers composite was prepared via the hot pressing. The obtained composite demonstrates the advantageous properties, including preferable mechanical performance, thermal stability, thermal and electrical conductivity. Notably, the electrical conductivity of the nanocomposite exhibits preferable stability under several physical and chemical damages. Moreover, the EP/r3.8-C19.2 film delivers the average electromagnetic interference shielding effectiveness (EMI SE) of 21.2 dB, which is further enhanced by increasing the carbon nanotubes (CNTs) content and film thickness. Considering the increased abuse of nondegradable polymers, this green, degradable, facile, and low-cost strategy opens an alternative route for conductive gaskets, facilitating the practical application of EUG.
      原文链接:
    • NSTL
    • Elsevier

    Dialdehyde starch reinforced polyacrylate-polyethylene glycol resin for impregnated decorative paper with improved toughness and ultra-low formaldehyde emission

    Liu, RuXu, JianfengWang, JinLong, Ling...
    8页
    查看更多>>摘要：To solve the problems of brittleness and formaldehyde emission of melamine-formaldehyde (MF) impregnated decorative paper, a polyacrylate-polyethylene glycol (PEG)-dialdehyde starch (DAS) was used to modify MF. The impregnation adhesive was characterized and the properties of impregnated decorative paper and laminated to plywood were tested. DAS showed better dispersion in the compound resin and higher reactivity with MF compared to the control. The MF can react with active aldehyde groups of DAS by Schiff base reaction and hydroxyl groups of polyacrylate, PEG, and DAS. Thus, the cross-linked structure was formed in the impregnated decorative paper interlayer. At mass ratio of polyacrylate-PEG-DAS:MF= 2:1, the abrasion value, surface bonding strength, fouling capacity of plywood was comparable to MF impregnated decorative paper bonded plywood, improved with crack resistance. In addition, the formaldehyde emission was sharply lowered down with ultra-low value of 0.03 mg/L, which was classified as F* ** * for very high JAS 234:2003 standard (<= 0.3 mg/L).
      原文链接:
    • NSTL
    • Elsevier

    Physiological and biochemical responses of Stevia rebaudiana Bertoni to nutri-priming and foliar nutrition under water supply restrictions

    Nakhaei, FatemehMosavi, SeyedgholamrezaSeghatoleslami, MohammadjavadAfshari, Fatemeh...
    19页
    查看更多>>摘要：Poor germination capacity of stevia is a major problem in its cultivation. Moreover, the water restrictions stress (WRS) are negatively affected germination, growth, yield, and secondary metabolites of stevia (Stevia rebaudiana Bertoni). In the present study, three separate experiments (growth-chamber, greenhouse, and field) were designed to assess the responses of stevia to nutri-priming and foliar nutrition with paclobutrazol (PBZ), nano potassium fertilizer (NKF), and salicylic acid (SA) treatments under water restriction stress (WRS). Water re-striction stress included 0, -3, -6, and -9 bar induced by PEG-8000 in germination and irrigation after 90 +/- 2, 75 +/- 2, 50 +/- 2, and 25 +/- 2% field water capacity (FC) in greenhouse and field conditions. Based on the results, WRS affected germination indices, physiological characteristics, growth and yield attribute, and Steviol glycoside (SVgly) biosynthesis negatively. It decreased germination percentage and rate, seedling vigor index, leaf number and yield, and photosynthetic pigment content, while increased the activity of catalase, peroxidase, and superoxide dismutase, and level of proline. Following the seed nutri-priming and foliar nutrition, morpho-physiological traits improved under stress and non-stress conditions. In the germination experiment, the integrated application of NKF, PBZ, and SA enhanced germination indices under the high PEG amount. Additionally, the foliar nutrition, especially PBZ and NKF, resulted in synthesising more photosynthetic pigments and proline, and rising antioxidant enzyme activity, and consequently increasing growth indices and WRS tolerance. The SVgly content and yield were maximised under partial WRS (75% FC) and high WRS stress reduced the secondary compounds of stevia significantly. Further, a significant enhancement was observed in the metabolite production after foliar treating with NKF and PBZ compared with the control. The results suggested the more sensitivity of stevia to WRS stress during germination. The integrated application of NKF, PBZ, and SA as a nutri-priming treatment can promote the poor germination performance of this plant and protect it from the negative effects of WRS. However, the use of NKF and PBZ changed physiological processes, leading to an improvement in stress tolerance, growth, yield, and secondary metabolite synthesis. Finally, the role of PBZ on yield attributes and metabolite production in this plant requires more extensive studies.
      原文链接:
    • NSTL
    • Elsevier