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Plant-protein-enabled biodegradable triboelectric nanogenerator for sustainable agriculture

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Fundamental Research 2022年第6期2卷 974-984页

作者： Chengmei Jiang Qi Zhang chengxin he Chi Zhang Xiaohui Feng Xunjia Li Qiang Zhao Yibin Ying Jianfeng Ping School of Biosystems Engineering and Food Science Zhejiang University866 Yuhangtang RoadHangzhouZhejiang 310058China State Key Laboratory of Food Science and Technology Nanchang UniversityJiangxi 330047China Hangzhou Thunder Agricultural Technology Co. LtdHangzhouZhejiang 311100China

As the use of triboelectric nanogenerators(TENGs)increases,the generation of related electronic waste has been a major ***,the development of environmentally friendly,biodegradable,and low-cost TENGs must be *** discovered that plant proteins,by-products of grain processing,possess excellent triboelectric properties,we explore these properties by evaluating the protein *** proteins are recycled to fabricate triboelectric layers,and the triboelectric series according to electrical properties is determined for the first *** a special structure design,we construct a plant-protein-enabled biodegradable TENG by integrating a polylactic acid film,which is used as a new type of mulch film to construct a growth-promoting system that generates space electric fields for ***,from the plant protein to the crop,a sustainable recycling loop is *** bean seedlings as a model to confirm the feasibility of the mulch film,we further use it in the cultivation of greenhouse *** results demonstrate the applicability of the proposed plant-protein-enabled biodegradable TENG in sustainable agriculture.

关键词： Energy harvesting Triboelectric nanogenerator Plant protein Sustainability Biodegradable Nanodevice

Trophic transfer of nanoparticles in food chain:A review

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Trophic transfer of nanoparticles in food chain:A review

Productivity and the Survival Rate after Winter Management of Seven Tropical Forage Accessions in Subtropical Region of China

全国环境纳米技术及生物效应学术研讨会

作者： Gaozhong Pu Guangping Xu chengxin he Yuqing Huang Guangxi Key Laboratory of Plant Conservation and Restoration Ecology in Karst Terrain Guangxi Institue of BotanyGuangxi Zhuang Autonomous Region and Chinese Academy of Sciences

Nanoparticles from the rapidly increasing number of consumer products have led to concerns about the health risks and environmental impacts of such nanosized materials. One of the most significant and currently not well-understood risks is their potential transfer and magnification in food chains. The present review summarizes and evaluates the characters of nanoparticles, the mechanism, impact factors and models of bioaccumulation and biomagnification of nanoparticles in both terrestrial and aquatic food chain. Differences of these nanoparticles physiological parameters in different groups of terrestrial or aquatic animals are discussed. The potential trophic transfer factor of nanoparticles along terrestrial or aquatic food chains can be predicted based on a simple kinetic equation by incorporating nanoparticles assimilation efficiency（AE）, nanoparticles efflux rate and ingestion activity of the animals. In general, during the transfer of nanoparticles along food chain, whether the concentration of nanoparticles will be biological amplification or dilution, depending on the different food chains and different nanoparticles. Although there are some studies of the bioaccumulation and biomagnification of nanoparticles in food chain, which mostly researched trophic transfer of nanoparticles in a simplified food chain, only a few researchers focused their studies on the integrity food chain. Furthermore, the physicochemical properties of nanoparticles in controlling food chain transfer are generally considered in many past studies, we suggest that the physiological and biochemical processes need to be emphasized in any future study. Therefore, it is necessary to study the bioaccumulation and biomagnification, as well as the related treatment models of nanoparticles in food chain since there are more and more applications of nanoparticles in various fields.

关键词： Food chain Nanoparticles Biomagnification Trophic transfer Nanoecotoxicology

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Agricultural Sciences 2017年第5期8卷 451-464页

作者： chengxin he Ling Mo Yuqing Huang Zhongfeng Zhang Michael Hare Danjuan Zen Gaozhong Pu Guangxi Key Laboratory of Plant Conservation and Restoration Ecology in Karst Terrain Guangxi Institute of Botany CAS Guilin China Faculty of Agriculture Ubon Ratchathani University Ubon Ratchathani Thailand

Forage production and quality of five tropical grass accessions (Guimu-1 hybrid elephant grass (PG1), Mulato II (M II), Ubon paspalum (PU), hybrid elephant grass (PH) and Reyan 11 paspalum (PR11)) and two tropical legume accessions (Reyan 5 stylo (SR5) and Ubon stylo (SU)) were evaluated in a field experiment in a subtropical area with hot summers and cold winters in Guangxi, China. Three forage stubble cover managements: no cover (CK), dry mass cover (MC) and plastic cover (PC) were applied at the end of the summer period to evaluate cold tolerance and accession survival over the winter. Photosynthesis measurements were taken from the forages in mid-summer. The results showed that PG1 accession produced significantly higher dry matter yields (67.0 t·ha-1) than the other grass and legume accessions. Legume accessions SU and SR5 produced much less dry matter (6.4 - 7.2 t·ha-1) compared to the grasses. M II, PU and PR11 contained the largest proportion of leaf. PG1 and PH showed good cold tolerance (survival rate >85%) under -1°C conditions without any cover management. PR11 had better cold tolerance than PU. M II exhibited very poor winter survival under no cover and with massive cover, and only survived well under plastic cover. The two stylo accessions died completely under all winter cover management treatments. In the growing season, under a given photosynthesis photon flux density (PPFD) = 1500 μmol m-2 s-1, the net photosynthesis rate Pn of all the seven accessions was above 28 μmol m-2 s-1, of which hybrid elephant grass and M II were above 42 μmol m-2 s-1. Though these 7 tropical accessions yielded high production in the grow season, stylo and M II are sensitive to cold in subtropical region of Guangxi. The result suggests that PG1 and PU are good accessions and can be used as productive perennial pasture, while stylo and M II are simply considered as annual one. Additionally, if paspalum was trained in cool region before being introduced to subtropical regio

关键词： Cold Tolerance Production Photosynthesis Tropical Grasses Winter

Point pattern analysis on Potentilla fruticosa population along altitudinal gradient in Qilian Mountains

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Point pattern analysis on Potentilla fruticosa population al...

生态文明建设中的植物学：现在与未来——中国植物学会第十五届会员代表大会暨八十周年学术年会

作者： Guangping Xu Zhengqiang Qiu chengxin he Daxing Gu Denan Zhang Yuqing Huang Guangxi Institute of Botany Guangxi Zhuang Autonomous Region and the Chinese Academy of Sciences hebei Institute of Architecture Civil Engineering

Potentilla fruticosa was sampled from Qilian Mountains, Qinghai province at altitudes of 2430m, 2990 m and 3522m respectively for investigation of its spatial distribution pattern. here we employed the technique of point pattern analysis which could analyze patterns under all scale along a gradient. The results showed that the population density decreased remarkably with increasing elevation, the ratio of root to shoot at 2430 m was significantly higher than that at 3522 m .The middle aged were the most, young ones were letter, and the old were the least in the population from the whole aspect. The populations of Potentilla fruticosa was randomly distributed at the small spatial scales, and was clumped at the most spatial scales which ranged from 0. 1 m to 7.5m .With the altitude elevation, the scale of the clumping distribution tends to decrease. The findings suggested that the spatial distribution patterns of Potentilla fruticosa at different altitudinal depended on their biological characteristics at small scale, but on the environmental heterogeneity at larger scales. The shift of balance between competition and facilitation among neighboring individual, might be partially responsible to the observed patterns. The spatial variations o f distribution pattern reflected the competition between different species and the trends of succession of plant community.

关键词： Point pattern analysis Ripley K function Altitudinal gradient Qilian Mountains.

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面向知识超图链接预测的生成对抗负采样方法

计算机研究与发展 2022年第8期59卷 1742-1756页

作者：郭正山左劼段磊李仁昊何承鑫肖英劼王培妍四川大学计算机学院成都610065

知识超图作为知识图谱的拓展,对多元关系事实具有良好表达能力.利用知识超图对现实世界中已知事实进行建模,并通过链接预测发现未知事实成为当前研究热点.在现有知识超图(知识图谱)链接预测方法中,构建样本真实标签与预测标签间的损失... 详细信息

知识超图作为知识图谱的拓展,对多元关系事实具有良好表达能力.利用知识超图对现实世界中已知事实进行建模,并通过链接预测发现未知事实成为当前研究热点.在现有知识超图(知识图谱)链接预测方法中,构建样本真实标签与预测标签间的损失函数是关键步骤,其中负样本对链接预测模型的训练具有极大的影响.将知识图谱链接预测的负采样方法(如均匀随机负采样)用于知识超图链接预测会面临负样本质量低下、复杂度过高等问题.对此,设计了面向知识超图链接预测的生成对抗负采样方法HyperGAN,通过对抗训练生成高质量负样本以解决“零损失”问题,从而提升链接预测模型的准确度.HyperGAN方法无需预训练,因此在辅助链接预测模型进行训练时相比现有负采样方法具有更高的效率.在多个真实数据集上的对比实验表明:HyperGAN在性能与效率方面均优于基线方法.此外,具体案例分析及定量分析亦验证了HyperGAN方法在提升负样本质量方面的有效性.

关键词：知识超图链接预测生成对抗网络负采样多元关系

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基于热消散技术的毛竹林蒸腾耗水估算

林业科学 2019年第1期55卷 31-37页

作者：顾大形黄科朝何文周翠鸣徐广平曾丹娟何成新黄玉清广西喀斯特植物保育与恢复生态学重点实验室广西壮族自治区中国科学院广西植物研究所桂林541006

【目的】试验不同长度热消散探针(TDP)测量毛竹液流的可行性,分析年龄对立竹液流的影响,并据此对立竹液流进行尺度扩展,估算桂北毛竹林的蒸腾耗水,为区域毛竹林的生态水文效应研究和指导关键生态功能区植被结构调整提供依据。【方法】... 详细信息

【目的】试验不同长度热消散探针(TDP)测量毛竹液流的可行性,分析年龄对立竹液流的影响,并据此对立竹液流进行尺度扩展,估算桂北毛竹林的蒸腾耗水,为区域毛竹林的生态水文效应研究和指导关键生态功能区植被结构调整提供依据。【方法】显微镜观察毛竹输水结构在竹壁上的径向分布。基于热消散方法,用5 mm和10 mm长度的TDP探针对1～2年生立竹和3龄以上立竹的基部液流进行连续测量,并同步测定环境因子。【结果】维管束在毛竹竹壁上不均匀分布,竹壁外侧维管束小而密,导管分化不完全,竹壁内侧维管束大而疏,导管分化完全,直径较大。10 mm TDP探针测得的液流密度显著高于5 mm探针,其平均液流密度是5 mm探针的4.03倍。在生长旺季的7月,基于10 mm TDP探针测量的1～2年生立竹正午液流密度显著高于3龄以上立竹,而在早上和傍晚二者基本相同。1～2年生立竹液流的平均日通量在测量生长季内均高于3龄以上立竹,二者的平均日液流通量分别为51.15和33.80 g·cm^(-2) d^(-1)。以立竹年龄和基径作为液流尺度扩展依据估测的桂北毛竹林日蒸腾耗水量在观测生长季内为0.01～0.72 mm·d^(-1),平均日蒸腾耗水量为0.31 mm·d^(-1)。【结论】10 mm长度的TDP探针较5 mm探针更适宜用于毛竹液流的测量。1～2年生立竹比3龄以上立竹具有更高的液流密度和日液流通量,因此年龄是毛竹液流由立竹到林分尺度扩展时除立竹直径外另一个必须要考虑的因素。

关键词：热消散毛竹年龄效应尺度扩展水分利用

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大戟科主要油料植物的开发利用研究进展

中国油脂 2009年第10期34卷 57-61页

作者：郭伦发何金祥王新桂林春蕊何成新中国科学院广西植物研究所广西桂林541006

对我国大戟科20种主要油料植物的含油量,油脂的脂肪酸组成、理化性质及近年来国内外的开发利用研究现状进行了综述,并根据国际生物柴油的相关标准,筛选出了6种最适合作为生物柴油原料的植物种类。同时分析了大戟科主要油料植物的利用前... 详细信息

对我国大戟科20种主要油料植物的含油量,油脂的脂肪酸组成、理化性质及近年来国内外的开发利用研究现状进行了综述,并根据国际生物柴油的相关标准,筛选出了6种最适合作为生物柴油原料的植物种类。同时分析了大戟科主要油料植物的利用前景和存在问题。

关键词：大戟科油料植物脂肪酸组成生物柴油研究进展

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漓江流域表层土壤水分物理性质空间异质性

水科学进展 2016年第5期27卷 696-704页

作者：姚月锋何成新曾丹娟周翠鸣莫凌黄玉清徐广平广西喀斯特植物保育与恢复生态学重点实验室广西桂林541006 广西壮族自治区中国科学院广西植物研究所广西桂林541006

为了解漓江流域土壤水分空间变化特征及其影响因素,基于2＇经纬网格,采用地统计学方法对该流域表层（0～10 cm）土壤水分物理性质的空间变异进行分析。结果表明：从空间结构比上,漓江流域表层土壤含水量、容重、最大和最小持水量均具有... 详细信息

为了解漓江流域土壤水分空间变化特征及其影响因素,基于2＇经纬网格,采用地统计学方法对该流域表层（0～10 cm）土壤水分物理性质的空间变异进行分析。结果表明：从空间结构比上,漓江流域表层土壤含水量、容重、最大和最小持水量均具有高度的空间自相关性（各指标空间结构比均大于0.87）,且其空间分布趋势基本一致,由流域上游向中下游逐渐变化。土地利用对流域表层土壤水分物理性质及其空间变异具有显著影响。受时间尺度和土地利用类型等因素的影响,漓江流域表层土壤含水量相比其他土壤水分物理性质,其空间异质性由随机引起的空间变异增加,空间自相关减小,为0.87;而土壤容重最大,为0.92。相关结果对于漓江流域土壤水分动态模拟与预测研究具有一定参考价值。

关键词：地统计学克里金空间异质性半方差函数土壤容重

喀斯特湿地水葫芦(Eichhornia crassipes)生长及表型可塑性特征对不同富营养化水体的响应

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湖泊科学 2021年第1期33卷 123-137页

作者：滕秋梅孙英杰沈育伊张德楠徐广平周龙武张中峰黄科朝何文何成新广西壮族自治区中国科学院广西植物研究所广西喀斯特植物保育与恢复生态学重点实验室桂林541006 广西壮族自治区中国科学院广西植物研究所广西植物功能物质研究与利用重点实验室桂林541006 中国地质科学院岩溶地质研究所自然资源部/广西岩溶动力学重点实验室桂林541004

选择桂林会仙喀斯特湿地,以不同富营养化水体中生长时期为6月(生长旺盛期)和8月(暴发高峰期)的水葫芦(Eichhornia crassipes)为研究对象,探讨不同富营养化条件下水葫芦的生长及表型可塑性响应特征,以揭示水葫芦对不同富营养化水体的生... 详细信息

选择桂林会仙喀斯特湿地,以不同富营养化水体中生长时期为6月(生长旺盛期)和8月(暴发高峰期)的水葫芦(Eichhornia crassipes)为研究对象,探讨不同富营养化条件下水葫芦的生长及表型可塑性响应特征,以揭示水葫芦对不同富营养化水体的生态适应机制.结果表明:水葫芦的株高、根长和叶绿素含量均随水体富营养化程度的增加而降低,叶柄数、叶柄宽、叶片数、叶长、叶宽、匍匐茎数和分株速率随着水体富营养化程度的增加而升高;各性状参数在暴发高峰期均略高于生长旺盛期;根生物量、茎生物量、叶生物量和总生物量均随水体富营养化程度的加深而增加,茎生物量高于根生物量和叶生物量;水葫芦生物量的分配以及性状间的权衡关系(根生物量比、茎生物量比、叶生物量比和茎叶比等)因生长时期的不同而呈现差异性,表现出较强的表型可塑性特征;水体总有机碳、总氮、总磷、硝态氮、氨氮和叶绿素a浓度分别与水葫芦的茎生物量、叶宽、匍匐茎数和分株速率间存在显著的正相关关系,与根长、株高、叶生物量比和茎叶比间存在显著的负相关关系;水葫芦的表型可塑性指数在0.009~0.792之间,叶重比的可塑性指数最大,根冠比最小,重度富营养化水体下的可塑性指数最大.在会仙喀斯特湿地不同富营养化水体环境中,水葫芦通过外部形态结构调节和生物量的配比关系,产生了有利于其入侵和存活的较强的表型可塑性,是其生存繁殖的重要响应机制之一.

关键词：喀斯特湿地水葫芦富营养化水体表型可塑性生态适应性