Industrial Crops and Products最新文献_第5页

Biomass pinecone powder inclusion for mitigating mechanical degradation in recycled polypropylene extrusions 掺入生物质松果粉以减轻再生聚丙烯挤出物的机械降解性能

IF 5.6 1区农林科学 Q1 AGRICULTURAL ENGINEERING

Industrial Crops and Products

Pub Date : 2024-11-13 DOI: 10.1016/j.indcrop.2024.119998

Phuong Van Do , Prabhakar M.N. , Krishnan Jayaraman , Jung-il Song

Recycling of polypropylene (rPP) poses challenges due to the degradation of its mechanical properties during multiple heating and cooling processes, which limits its practical applications. To address this issue, this study explores the incorporation of pinecone powder (PCP) as a sustainable reinforcing filler to improve the thermomechanical properties of rPP. The motivation stems from the need for eco-friendly materials that can reduce the effects of thermal degradation while enhancing mechanical performance. Experimental results showed that rPP composites containing 15 wt% PCP achieved significant improvements, with tensile strength increasing by 22 % (from 21.17 MPa to 25.86 MPa) and flexural strength by 24 % (from 35.2 MPa to 43.75 MPa) compared to neat rPP. Fourier-transform infrared spectroscopy (FTIR) confirmed strong interfacial bonding between the rPP matrix and PCP, contributing to improved tensile and flexural properties. Thermogravimetric analysis (TGA) revealed enhanced thermal stability, delaying the onset of thermal degradation. Scanning electron microscopy (SEM) showed that PCP expansion at high temperatures led to better distribution of particles, though non-uniform particle sizes and interfacial debonding were observed at elevated temperatures. These findings highlight PCP’s potential as a bio-based filler for improving rPP properties, although further optimization of particle size distribution and interfacial adhesion is necessary for industrial applications. The results demonstrate the potential of PCP to address both mechanical and environmental challenges in polypropylene recycling.

由于聚丙烯（rPP）在多次加热和冷却过程中会出现机械性能退化，这限制了其实际应用，因此回收利用聚丙烯（rPP）是一项挑战。为解决这一问题，本研究探讨了加入松果粉（PCP）作为可持续增强填料，以改善 rPP 的热机械性能。其动机源于对既能减少热降解影响又能提高机械性能的环保材料的需求。实验结果表明，与纯 rPP 相比，含有 15 wt% PCP 的 rPP 复合材料实现了显著改善，拉伸强度提高了 22%（从 21.17 兆帕提高到 25.86 兆帕），弯曲强度提高了 24%（从 35.2 兆帕提高到 43.75 兆帕）。傅立叶变换红外光谱（FTIR）证实了 rPP 基体和五氯苯酚之间的强界面结合，有助于改善拉伸和弯曲性能。热重分析（TGA）显示热稳定性增强，热降解开始时间延迟。扫描电子显微镜（SEM）显示，尽管在高温下观察到颗粒尺寸不均匀和界面脱粘现象，但 PCP 在高温下的膨胀使颗粒分布更均匀。这些发现凸显了五氯苯酚作为生物基填料在改善 rPP 性能方面的潜力，不过在工业应用中还需要进一步优化粒度分布和界面粘附性。这些结果表明，五氯苯酚具有解决聚丙烯回收中机械和环境挑战的潜力。

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引用次数: 0

Manipulating flavonoid biosynthesis in Trigonella persica through controlled spectral lighting 通过控制光谱光照操纵柿子三叶草中黄酮类化合物的生物合成

IF 5.6 1区农林科学 Q1 AGRICULTURAL ENGINEERING

Industrial Crops and Products

Pub Date : 2024-11-13 DOI: 10.1016/j.indcrop.2024.120016

Ehsan Bakhshy , Fatemeh Zarinkamar , Bahram Mohammad Soltani , Mehrdad Nazari

Trigonella persica Boiss., is renowned for its rich phytochemical profile, particularly the presence of the flavonol quercetin. This study explored the effects of various light treatments, including blue, red, blue-red (1:1) radiation (BRR), and pink fluorescent light (PFL), on the biochemical and molecular mechanisms governing quercetin and flavonoid biosynthesis in T. persica at different growth stages. Our results showed that light treatments significantly influenced the activity of key enzymes phenylalanine ammonia-lyase (PAL) and tyrosine ammonia-lyase (TAL) during germination and vegetative growth, with blue light inducing higher PAL and TAL activities compared to control conditions. High-performance liquid chromatography (HPLC) and liquid chromatography-mass spectrometry (LC-MS) analyses revealed that 48-h-old sprouts grown under red light exhibited the highest levels of flavonoid components and phenolic acids, with catechin as the predominant flavonoid. Notably, BRR treatment led to elevated concentrations of the bioavailable quercetin-3-rhamnoside in 48-h-old sprouts, while 15-day-old plants grown under PFL conditions showed a significant accumulation of the sulfated quercetin-3-sulfate. Real-time PCR analysis demonstrated that BRR upregulated the expression of flavonoid biosynthesis genes PAL, chalcone synthase (CHS), and chalcone isomerase (CHI) in sprouts, whereas PFL treatment induced higher expression of these genes, as well as cinnamate 4-hydroxylase (C4H), in aerial parts. These findings suggest that targeted light treatments, particularly blue and red LED light, can enhance the accumulation of bioavailable quercetin-3-rhamnoside during T. persica germination and sprouts exhibit higher levels of flavonoids and phenolic acids than aerial parts during different vegetative growth stages.

Trigonella persica Boiss.以其丰富的植物化学成分而闻名，尤其是黄酮醇槲皮素。本研究探讨了各种光处理（包括蓝光、红光、蓝-红（1:1）辐射（BRR）和粉红荧光灯（PFL））对不同生长阶段柿树槲皮素和黄酮类化合物生物合成的生化和分子机制的影响。结果表明，在萌芽期和无性生长期，光处理对关键酶苯丙氨酸氨解酶（PAL）和酪氨酸氨解酶（TAL）的活性有显著影响，与对照条件相比，蓝光诱导更高的PAL和TAL活性。高效液相色谱（HPLC）和液相色谱-质谱（LC-MS）分析表明，在红光下生长 48 小时的芽表现出最高水平的类黄酮成分和酚酸，其中儿茶素是最主要的类黄酮。值得注意的是，BRR 处理导致 48 小时龄幼芽中生物可利用的槲皮素-3-鼠李糖苷浓度升高，而在 PFL 条件下生长 15 天的植株则显示出硫酸化的槲皮素-3-硫酸盐的显著积累。实时 PCR 分析表明，BRR 上调了芽中黄酮生物合成基因 PAL、查尔酮合成酶（CHS）和查尔酮异构酶（CHI）的表达，而 PFL 处理则诱导这些基因以及肉桂酸 4- 羟化酶（C4H）在气生部分中的高表达。这些研究结果表明，有针对性的光处理，特别是蓝色和红色 LED 光，可以在柿树发芽过程中提高生物可利用的槲皮素-3-鼠李糖苷的积累，而且在不同的无性生长阶段，幼芽比气生组织表现出更高水平的黄酮类化合物和酚酸。

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引用次数: 0

Sustainable straightforward synthesis of hierarchically porous graphitised carbon foams with nanodispersed magnetite and elemental iron particles 可持续地直接合成具有纳米分散磁铁矿和元素铁颗粒的分层多孔石墨化碳泡沫

IF 5.6 1区农林科学 Q1 AGRICULTURAL ENGINEERING

Industrial Crops and Products

Pub Date : 2024-11-13 DOI: 10.1016/j.indcrop.2024.120058

Cristóbal Cuesta, Elena Rodríguez, Sara F. Villanueva, María Antonia Diez, Ana Arenillas, María Antonia López-Antón, M. Rosa Martínez-Tarazona, Roberto García

This study presents a straightforward synthesis method for producing 3D carbon foams with specific characteristics, including an open macroporous structure combined with microporosity and mesoporosity, as well as the nanodispersion of various iron species within the carbonaceous matrix. The process involves thermo-foaming and carbonisation of sucrose in the presence of an iron nitrate additive, resulting in ordered carbon structures with reduced oxygen content and finely nanodispersed iron species particles within the carbon matrix. The properties of the resulting material vary based on the proportion of the additive and the carbonisation temperature, highlighting the versatility of the method in producing different materials for diverse plications. Above 800 °C, iron nitrate reacts to form Fe₃O₄ and Fe⁰, which catalytically influence the foam structure. Graphitisation consistently occurs between 800 and 900 °C, facilitated by the fine nanodispersion of iron species. The combination of an open macroporous nature with microporosity and mesoporosity, along with a partially graphitised carbonaceous matrix containing nanodispersed active iron species, makes these materials promising candidates for valuable applications such as adsorption, catalysis, and biomedical uses.

本研究提出了一种生产三维碳泡沫的直接合成方法，这种泡沫具有特定的特性，包括开放的大孔结构与微孔和中孔相结合，以及碳质基质中各种铁元素的纳米分散。该工艺涉及蔗糖在硝酸铁添加剂存在下的热发泡和碳化，从而产生有序的碳结构，氧含量降低，碳基质中的铁种颗粒呈精细的纳米分散。根据添加剂的比例和碳化温度的不同，所得材料的性质也不同，这突出表明了该方法在生产不同材料以用于不同用途方面的多功能性。在 800 °C 以上，硝酸铁反应生成 Fe3O4 和 Fe0，对泡沫结构产生催化作用。铁元素的精细纳米分散促进了石墨化在 800 至 900 °C之间持续发生。开放的大孔性质与微孔和中孔相结合，再加上含有纳米分散活性铁元素的部分石墨化碳质基质，使这些材料有望用于吸附、催化和生物医学等有价值的应用领域。

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引用次数: 0

Recyclable polyurethane from castor oil based on dynamic disulfide bonds and multiple hydrogen bonds as adhesive and photothermal conversion materials 基于动态二硫键和多重氢键的可回收蓖麻油聚氨酯，可用作粘合剂和光热转换材料

IF 5.6 1区农林科学 Q1 AGRICULTURAL ENGINEERING

Industrial Crops and Products

Pub Date : 2024-11-13 DOI: 10.1016/j.indcrop.2024.120027

Yan Fang , Qiaoguang Li , Zhimin Kou , Yufeng Ma , Meng Zhang , Yun Hu , Puyou Jia , Yonghong Zhou

As an important polymer material, polyurethane brings convenience to daily life but also causes environmental problems, and the manufacturing of bio-based repairable, re-processable and sturdy materials can effectively reduce environmental pressure. Herein a low temperature recyclable polyurethane (PU) was developed with castor oil (CO) by combining isophorone diisocyanate (IPDI), dynamic disulfide bonds and hydrogen bonds. The castor oil-based PU showed impressive tensile strength (16.1 MPa) remarkable elongation at break (1055.8 %), and high bonding power (up to ∼6 MPa) with bonding wood chips. The dynamic disulfide bonds and hydrogen bonds imparted the bio-based PU with outstanding elastic recovery, impressive self-healing capability (up to ∼90 %), short relaxation time (5–6 min at 180°C), favorable shape memory behavior, and multiple recyclability. By mixing different proportions of carbon nanotubes (CNTs), recyclable and stretchable conductive composites are realized. In addition, an integrated system of high-efficiency bio-based solar photovoltaic generator is demonstrated for simulating the ambient sunlight-heat-electricity conversion, which provides some guidance for the efficient use of solar energy.

聚氨酯作为一种重要的高分子材料，在给人们日常生活带来便利的同时，也带来了环境问题，而制造可修复、可再加工、坚固耐用的生物基材料可有效减轻环境压力。本文通过结合异佛尔酮二异氰酸酯（IPDI）、动态二硫键和氢键，用蓖麻油（CO）开发了一种低温可回收聚氨酯（PU）。蓖麻油基聚氨酯显示出惊人的拉伸强度（16.1 兆帕）、显著的断裂伸长率（1055.8%）以及与木屑的高粘合力（高达 6 兆帕）。动态二硫键和氢键赋予了生物基聚氨酯出色的弹性恢复能力、令人印象深刻的自愈能力（高达 ∼ 90 %）、较短的松弛时间（180°C 下 5-6 分钟）、良好的形状记忆行为和多重可回收性。通过混合不同比例的碳纳米管，实现了可回收和可拉伸的导电复合材料。此外，还展示了一个高效生物基太阳能光伏发电机集成系统，用于模拟环境日光-热-电转换，为高效利用太阳能提供了一些指导。

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引用次数: 0

Engineering xylanase from Trichoderma harzianum enhances xylan hydrolysis to produce xylooligosaccharides 对哈茨真菌的木聚糖酶进行工程改造，提高木聚糖水解能力以生产木寡糖

IF 5.6 1区农林科学 Q1 AGRICULTURAL ENGINEERING

Industrial Crops and Products

Pub Date : 2024-11-13 DOI: 10.1016/j.indcrop.2024.120008

Qian Chen , Fei He , Bo-Wen Zheng, Xue-Mei Luo, Jia-Xun Feng, Shuai Zhao

Saccharification of xylan from lignocellulosic wastes into xylooligosaccharide prebiotics, specifically xylobiose and xylotriose, is of great economic importance and relies on specific endo-β-1,4-xylanases. Our previous studies identified endo-β-1,4-xylanase TXyn11A from Trichoderma harzianum that mainly produces xylobiose and/or xylotriose from hydrolysis of beechwood and sugarcane bagasse xylan. However, its catalytic mechanisms remain unclear, and yields from native T. harzianum are very low. In the present study, recombinant TXyn11A (rTXyn11A) purified from Pichia pastoris catalysed the conversion of xylan into xylobiose and xylotriose via its combined endo-β-1,4-xylanase and β-1,4-xylosidase activities, and transglycosidation. Random mutagenesis and point mutation based on auto-docking identified eight key residues essential for specific activity and hydrolysis ability. Notably, glutamine 156 and aspartic acid 201 respectively control hydrolysis of xylotriose and xylotetraose to generate xylobiose. Mutant enzymes Q156A and D201I, and double mutant Q156A-D201I, displayed enhanced specific activity and ability to hydrolyze xylan into xylooligosaccharide. Auto-docking analysis revealed that the active centres of the three mutant enzymes bound xylotriose and xylotetraose more strongly than wild-type enzyme via more hydrogen bonds. These results provide novel insights into the mechanism of xylanase action to produce mainly xylobiose from hydrolysis of xylan, and engineered xylanases with improved catalytic activity.

将木质纤维素废料中的木聚糖糖化为木寡糖益生元（特别是木糖和木三糖）具有重要的经济意义，这有赖于特定的内酵母-β-1,4-木聚糖酶。我们之前的研究发现了来自哈茨真菌的内切-β-1,4-木聚糖酶 TXyn11A，它主要通过水解榉木和甘蔗渣木聚糖产生木糖和/或木三糖。然而，它的催化机理仍不清楚，本地哈茨真菌的产量也很低。在本研究中，从 Pichia pastoris 中纯化的重组 TXyn11A（rTXyn11A）通过其联合的内β-1,4-木聚糖酶和β-1,4-木糖苷酶活性以及转糖苷化作用，催化木聚糖转化为木糖和木三糖。基于自动对接的随机突变和点突变确定了对特定活性和水解能力至关重要的八个关键残基。值得注意的是，谷氨酰胺 156 和天冬氨酸 201 分别控制着木三糖和木四糖的水解以生成木糖。突变体酶 Q156A 和 D201I 以及双突变体 Q156A-D201I 显示出更强的特异性活性和将木聚糖水解为木寡糖的能力。自动对接分析表明，与野生型酶相比，这三种突变体酶的活性中心通过更多的氢键与木三糖和木四糖结合得更紧密。这些结果为了解木聚糖酶主要通过水解木聚糖产生木寡糖的作用机理提供了新的视角，并使工程木聚糖酶具有更高的催化活性。

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引用次数: 0

Allelopathic characterization and allelochemicals identification of hemp (Cannabis sativa L.) leaf residue 大麻（Cannabis sativa L.）叶残留物的等位表征和等位化学物质鉴定

IF 5.6 1区农林科学 Q1 AGRICULTURAL ENGINEERING

Industrial Crops and Products

Pub Date : 2024-11-13 DOI: 10.1016/j.indcrop.2024.120003

Thiprada Poonsawat, Nutnicha Srilasak, Intira Koodkaew

Allelopathy presents significant potential in sustainable agriculture as a defensive mechanism for plants. Hemp (Cannabis sativa L.) exhibited allelopathic properties, and the cultivation of hemp as an economic crop yields substantial leaf residue. This study aims to evaluate the allelopathic effects as well as a mode of action of hemp leaf on target plants and to identify the allelochemicals released from hemp leaf. The investigation focused on the phytotoxic effects of hemp leaf leachate, obtained via the sandwich method at concentrations of 0.25 %, 0.50 % and 1.00 %, on wheat, itchgrass, lettuce, pea bean and hemp species. Results indicated that a high concentration of hemp leaf inhibited seed germination and seedling growth across the tested plants with varying degrees of inhibition observed among recipient species. Analysis of hemp leaf’s allelopathic action revealed its efficacy in inducing reactive oxygen species (ROS) overproduction, diminishing cell viability and inhibiting mitosis division, leading to root growth inhibition. These effects are attributed to the synergistic action of phenolic compounds and cannabinoids released from hemp leaves. Pot culture experiments incorporating hemp leaf into soil corroborate observations made under laboratory conditions, demonstrating consistent impacts on germination and seedling growth. Hemp leaf had no effect on pigment accumulation, but at high concentrations, it reduced the leaf area of all tested plants. Hemp leaf residues became intricately intertwined with soil factors. The biomass of hemp leaf emerges as a potential source of herbicidal substances, offering a promising prospect for integration into agricultural systems to achieve effective and sustainable weed control.

作为植物的一种防御机制，等位效应在可持续农业中具有巨大潜力。大麻（Cannabis sativa L.）具有等位病理特性，大麻作为一种经济作物在种植过程中会产生大量残留叶片。本研究旨在评估大麻叶对目标植物的等位病理效应和作用模式，并确定大麻叶释放的等位化学物质。调查的重点是麻叶浸出液对小麦、痒草、莴苣、豌豆和大麻物种的植物毒性作用，浸出液采用夹心法获得，浓度分别为 0.25%、0.50% 和 1.00%。结果表明，高浓度的大麻叶对所有受试植物的种子萌发和幼苗生长都有抑制作用，不同受试物种的抑制程度不同。对大麻叶等效作用的分析表明，大麻叶能诱导活性氧（ROS）过量产生，降低细胞活力，抑制有丝分裂，从而抑制根系生长。这些作用归因于大麻叶释放的酚类化合物和大麻素的协同作用。在土壤中加入大麻叶的盆栽培养实验证实了在实验室条件下的观察结果，表明大麻叶对发芽和幼苗生长的影响是一致的。大麻叶对色素积累没有影响，但在高浓度下，所有受测植物的叶面积都会减少。麻叶残留物与土壤因素错综复杂地交织在一起。大麻叶的生物质成为除草物质的潜在来源，为将其纳入农业系统以实现有效和可持续的杂草控制提供了广阔的前景。

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引用次数: 0

A green approach for delignification of corn husks and their application as an unpowered thermo-responsive sensor 玉米皮脱木质素的绿色方法及其作为无动力热响应传感器的应用

IF 5.6 1区农林科学 Q1 AGRICULTURAL ENGINEERING

Industrial Crops and Products

Pub Date : 2024-11-12 DOI: 10.1016/j.indcrop.2024.119986

Saqib Mehmood , Jianquan Wang , Zhimao Li , Wenwen Qiu , Amna Arshad , Yanlong Shang , Bochao Yang , Junxiong Zhu , Ziqiang Shao , Hamayoun Mahmood

The world is adopting biodegradable materials to replace existing petroleum-based plastics, owing to their toxicity and unfriendly environmental aspects. Biodegradable corn husk (CH) is considered a promising alternative due to its environmental friendliness and widespread availability as agricultural waste. In this work, a green process for the delignification of corn husk was developed and preparation of CH-based reversible thermo-responsive delignified corn husk (RTDCH) sensors was done which exhibit different colors corresponding to particular temperature ranges. These RTDCH sensors employed with reversible thermo-responsive nanoparticles (RTNPs) were characterized thoroughly using X-ray Diffraction (XRD), scanning electron microscopy (SEM), thermo-gravimetric analysis (TGA), and Fourier transform spectroscopy (FTIR), which ensures their successful synthesis. Upon deploying them for sensing temperatures from 20 to 80℃, different color displays appeared rapidly within 5 seconds, which helps to identify the particular temperature range. The RTDCH exhibited excellent reusability for several cycles and maintained consistency in color displays at certain exposed temperatures. The RTDCH, being unpowered, fast responsive, accurate, biodegradable, economical, and scalable production feasibilities, has the necessary traits to become practical at the industrial level. Such materials have tremendous potential for the food industry, scientific laboratories, and monitoring the temperature of industrial processes. The strategy adopted in this work is crucial since it is paving the way for the development of advanced functional materials from natural wastes through green synthesis approaches.

由于石油基塑料的毒性和对环境的不友好性，全世界都在采用生物降解材料来替代现有的石油基塑料。可生物降解的玉米皮（CH）因其环境友好性和可作为农业废弃物广泛利用而被认为是一种有前途的替代品。在这项工作中，开发了一种玉米皮脱木质素的绿色工艺，并制备了基于 CH 的可逆热响应脱木质素玉米皮（RTDCH）传感器。使用 X 射线衍射 (XRD)、扫描电子显微镜 (SEM)、热重分析 (TGA) 和傅立叶变换光谱 (FTIR) 对这些采用可逆热响应纳米粒子 (RTNPs) 的 RTDCH 传感器进行了全面的表征，从而确保了它们的成功合成。将它们用于感测 20 至 80℃ 的温度时，在 5 秒钟内迅速显示出不同的颜色，这有助于识别特定的温度范围。热电阻和热电阻开关在多次循环使用后表现出卓越的可重复性，并在特定暴露温度下保持颜色显示的一致性。热电阻和热电偶无动力、反应快、准确、可生物降解、经济、生产规模大，具备了在工业层面实用的必要特性。这种材料在食品工业、科学实验室和工业过程温度监测方面具有巨大的潜力。这项工作采用的策略至关重要，因为它为通过绿色合成方法从天然废物中开发先进功能材料铺平了道路。

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引用次数: 0

Integrated physiological, transcriptomic and metabolomic analyses of glossy mutant under drought stress in rapeseed (Brassica napus L.) 油菜（Brassica napus L.）干旱胁迫下光泽突变体的生理、转录组和代谢组综合分析

IF 5.6 1区农林科学 Q1 AGRICULTURAL ENGINEERING

Industrial Crops and Products

Pub Date : 2024-11-12 DOI: 10.1016/j.indcrop.2024.120007

Ru Zhang , Ruolin Gong , Zhanling An, Guangze Li, Chunyan Dai, Rong Yi, Yaqian Liu, Jungang Dong, Jihong Hu

Rapeseed (Brassica napus L.), the second most important oil crop in the world, is extremely vulnerable to drought stress, resulting in severe reductions in yield and quality. Leaf epidermal wax plays an important role in drought stress. However, the genetic basis and regulatory mechanism of wax synthesis in B. napus remain unclear. Here, the integrated analysis of physiology, transcriptome, and metabolome was performed on a glossy mutant under drought stress to reveal the molecular basis of cuticular wax accumulation in rapeseed. Integrated transcriptomic and metabolomic analyses revealed the important roles of unsaturated fatty acids, wax biosynthesis, and plant hormone signal transduction in leaves for enhancing drought tolerance. Several candidate genes were identified to be involved in alkane synthesis and alcohol synthesis of the wax synthesis pathway, including CER1, MYB, FAR3, and MAH1, based on transcriptome and metabolome with weighted gene co-expression network analysis (WGCNA). And RT-qPCR also validated the expression patterns of these candidate genes in the glossy mutant under drought stress. This study provides new insights into the molecular mechanism of leaf epidermis wax synthesis and lays a foundation for breeding drought-resistant varieties and further functional research on the cuticular wax synthesis pathway in rapeseed.

油菜籽（Brassica napus L.）是世界上第二重要的油料作物，极易受到干旱胁迫，导致产量和质量严重下降。叶表皮蜡质在干旱胁迫中发挥着重要作用。然而，油菜叶蜡合成的遗传基础和调控机制仍不清楚。本文对干旱胁迫下的光泽突变体进行了生理学、转录组和代谢组的综合分析，以揭示油菜角质蜡积累的分子基础。转录组和代谢组的综合分析揭示了叶片中不饱和脂肪酸、蜡的生物合成和植物激素信号转导对提高耐旱性的重要作用。基于转录组和代谢组与加权基因共表达网络分析（WGCNA），确定了多个参与蜡合成途径中烷烃合成和醇合成的候选基因，包括CER1、MYB、FAR3和MAH1。RT-qPCR 也验证了这些候选基因在干旱胁迫下光泽突变体中的表达模式。该研究为叶片表皮蜡质合成的分子机制提供了新的见解，为培育抗旱品种和进一步开展油菜角质蜡质合成途径的功能研究奠定了基础。

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引用次数: 0

Functionalized cellulose nanocrystals for enhanced wood protection: Synthesis, characterization, and performance 用于增强木材保护的功能化纤维素纳米晶体：合成、表征和性能

IF 5.6 1区农林科学 Q1 AGRICULTURAL ENGINEERING

Industrial Crops and Products

Pub Date : 2024-11-12 DOI: 10.1016/j.indcrop.2024.120021

Azar Haghighi Poshtiri , Sima Sepahvand , Mehdi Jonoobi , Alireza Ashori , Ali Naghi Karimi , Fatemeh Hasanzadeh Fard , Laura Bergamonti , Claudia Graiff , Sabrina Palanti

This study developed eco-friendly protective materials for wood preservation, focusing on enhancing fungal decay resistance, insect damage prevention, and improving physical and mechanical properties. The research examined the penetration of cellulose nanocrystals (CNCs) and their functionalized compounds into wood tissue, evaluating their impact on poplar wood. Methodology included optimizing CNC production through acid hydrolysis, testing various temperature and time combinations. CNCs were then functionalized with Poly(dimethylsiloxane)-bis(3-aminopropyl) terminated (PDMS-NH), copper hydroxide, zinc oxide, and silver nanoparticles. Characterization techniques such as AFM, TEM, ESEM, XRD, FTIR, and μ-Raman spectroscopy analyzed CNCs and their derivatives. Wood samples were impregnated with CNCs and functionalized CNCs using pressure and vacuum treatments, then tested for weight gain, durability against white rot (Trametes versicolor) and brown rot (Coniophora puteana) fungi, resistance to insect attack (Trichoferus holosericeus), leaching resistance, and mechanical properties. Key findings included successful optimization of CNC production and functionalization, improved resistance against decay fungi (especially with CNC3/Cu treatment), elevating durability classification from "non-durable" to "low durability". However, treatments showed limited effectiveness against insect infestation. Leaching resistance varied among treatments, with CNC3/PDMS-NH performing best. Mechanical properties, particularly modulus of elasticity, improved significantly with CNC3 impregnation, especially in less degraded wood samples. The study contributes to eco-friendly wood protection systems development, demonstrating functionalized CNCs' potential to enhance wood durability and mechanical properties. Further research is needed to improve insect resistance and optimize the leaching performance of CNC-based treatments, paving the way for more sustainable wood preservation methods.

这项研究开发了用于木材防腐的环保型保护材料，重点是提高抗真菌腐烂能力、防止虫害以及改善物理和机械性能。研究考察了纤维素纳米晶体（CNC）及其功能化化合物对木材组织的渗透，评估了它们对杨木的影响。研究方法包括通过酸水解优化 CNC 的生产，测试各种温度和时间组合。然后，用端基聚（二甲基硅氧烷）-双（3-氨基丙基）（PDMS-NH）、氢氧化铜、氧化锌和纳米银颗粒对 CNC 进行功能化。AFM、TEM、ESEM、XRD、FTIR 和 μ-Raman 光谱等表征技术对 CNC 及其衍生物进行了分析。使用压力和真空处理方法对木材样品进行氯化萘和功能化氯化萘浸渍，然后测试其增重、抗白腐病（Trametes versicolor）和褐腐病（Coniophora puteana）真菌的耐久性、抗虫害（Trichoferus holosericeus）能力、抗浸出能力和机械性能。主要发现包括成功优化了 CNC 的生产和功能化，提高了对腐烂真菌的抗性（尤其是 CNC3/Cu 处理），将耐久性分类从 "非耐久性 "提升到 "低耐久性"。不过，处理对虫害的效果有限。不同处理的耐浸出性各不相同，其中 CNC3/PDMS-NH 的表现最好。浸渍 CNC3 后，机械性能（尤其是弹性模量）明显改善，特别是在降解程度较低的木材样本中。这项研究表明功能化 CNC 具有提高木材耐久性和机械性能的潜力，有助于环保型木材保护系统的开发。还需要进一步研究如何提高抗虫性和优化基于 CNC 的处理剂的浸出性能，从而为更可持续的木材防腐方法铺平道路。

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引用次数: 0

Wood-based phase change energy storage composite material with reversible thermochromic properties 具有可逆热变色特性的木基相变储能复合材料

IF 5.6 1区农林科学 Q1 AGRICULTURAL ENGINEERING

Industrial Crops and Products

Pub Date : 2024-11-12 DOI: 10.1016/j.indcrop.2024.120042

Wenjie Zhu , Linping Tian , Zhiyuan Yin , Yingxuan Feng , Wenjie Xia , Huinan Wang , Qingfeng Sun , Yingying Li

With the continuous increase in global energy demand and environmental challenges, the efficient utilization and storage of energy have become critical areas of scientific research. This study presents the preparation and performance assessment of a wood-based phase change composite (TPW) with reversible thermochromic properties. Thermogravimetric analysis (TG) confirmed thermal stability across 26 °C to 270 °C, while differential scanning calorimetry (DSC) demonstrated that TPW has good thermal cycling performance, and suitable phase change temperature at about 34 °C. Thermal insulation tests showed that TPW can reduce heat exchange between inside and outside environment, maintaining the internal temperature for longer time. Below the transition temperature, the material displays a bluish-purple color, transitioning to light yellow upon heating, with a notable color difference (ΔE*) increase from 3.46 to 67.89. Since the phase transition temperature close to human body temperature, enhances TPW’s compatibility for applications in home decor, temperature indicators, and anti-counterfeit labeling. This research contributes novel insights and foundational data for advancing wood-based functional materials in sustainable applications.

随着全球能源需求的持续增长和环境挑战的日益严峻，能源的高效利用和储存已成为科学研究的关键领域。本研究介绍了一种具有可逆热致变色特性的木基相变复合材料（TPW）的制备和性能评估。热重分析（TG）证实了其在 26 ℃ 至 270 ℃ 范围内的热稳定性，而差示扫描量热法（DSC）则证明了 TPW 具有良好的热循环性能，并在 34 ℃ 左右具有合适的相变温度。隔热测试表明，TPW 可以减少内外环境之间的热交换，从而长时间保持内部温度。在转变温度以下，材料呈现蓝紫色，加热后转变为淡黄色，色差（ΔE*）从 3.46 显著增加到 67.89。由于相变温度接近人体体温，因此提高了 TPW 在家居装饰、温度指示器和防伪标签等应用领域的兼容性。这项研究为推动木基功能材料在可持续应用领域的发展提供了新的见解和基础数据。

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引用次数: 0