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Science China(Technological Sciences) 2024年第5期67卷 1391-1400页

作者： HU JiaJun QIAN Shuo WU Hui HU DongXu niu lixin BI XiaoXue ZHANG Jie HOU XiaoJuan GENG WenPing MU JiLiang HE Jian CHOU XiuJian Science and Technology on Electronic Test and Measurement Laboratory North University of ChinaTaiyuan030051China School of Software North University of ChinaTaiyuan030051China

In our daily lives,low-frequency kinetic energy primarily manifests as ***,effective harnessing of lowfrequency kinetic energy remains a formidable *** paper proposes a rope-driven rotor that rotates around an axis and consists of an ultra-high-molecular-weight polyethylene(UHMWPE)wire wrapped around a metal *** rotor can convert ultra-low frequency vibration/linear motion into rapid rotation by pressing the top at low frequencies and driving the rope for a quick *** harvester can generate up to 36.25 m W power using a 0.1-mm-diameter UHMWPE wire as the rotor when periodically pressed down to 20 mm at a frequency of 1 Hz.A simple power generation floor is assembled,generating 28.58-m W power with a matching load at a frequency of 1.5 ***,the harvester can increase the charging voltage of a 0.47-F supercapacitor from 0 to 6.8 V within 10 *** addition,the harvester can harvest energy through a light finger press motion,and the energy obtained can also support the continuous operation of multiple electronic devices *** study introduces an effective method for harvesting ultra-low frequency energy and has great prospects in the field of power generation floor and human movement energy harvesting.

关键词： electromagnetic energy harvester rope-shaft coupling structure human motion ultra-low frequency

A petunia transcription factor, PhOBF1, regulates flower senescence by modulating gibberellin biosynthesis

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Horticulture Research 2023年第4期10卷 38-52页

作者： Xiaotong Ji Ziwei Xin Yanping Yuan Meiling Wang Xinyi Lu Jiaqi Li Yanlong Zhang lixin niu Cai-Zhong Jiang Daoyang Sun College of Landscape Architecture and Arts Northwest A&F UniversityYanglingShaanxi 712100China Department of Plant Sciences University of CaliforniaDavisDavisCA 95616USA Crops Pathology and Genetics Research Unit USDA-ARSDavisCA 95616USA

Flower senescence is commonly enhanced by the endogenous hormone ethylene and suppressed by the gibberellins(GAs)in ***,the detailed mechanisms for the antagonism of these hormones during f lower senescence remain *** this study,we characterized one up-regulated gene PhOBF1,belonging to the basic leucine zipper transcription factor family,in senescing petals of petunia(Petunia hybrida).Exogenous treatments with ethylene and GA3 provoked a dramatic increase in PhOBF1 *** with wild-type plants,PhOBF1-RNAi transgenic petunia plants exhibited shortened f lower longevity,while overexpression of PhOBF1 resulted in delayed flower *** abundances of two senescence-related genes PhSAG12 and PhSAG29 were higher in PhOBF1-silenced plants but lower in PhOBF1-overexpressing *** and overexpression of PhOBF1 affected expression levels of a few genes involved in the GA biosynthesis and signaling pathways,as well as accumulation levels of bioactive GAs GA1 and *** of GA3 restored the accelerated petal senescence to normal levels in PhOBF1-RNAi transgenic petunia lines,and reduced ethylene release and transcription of three ethylene biosynthetic genes PhACO1,PhACS1,and ***,PhOBF1 was observed to specifically bind to the PhGA20ox3 promoter containing a G-box *** silencing of PhGA20ox3 in petunia plants through tobacco rattle virus-based virus-induced gene silencing method led to accelerated corolla *** results suggest that PhOBF1 functions as a negative regulator of ethylene-mediated f lower senescence by modulating the GA production.

关键词： senescence pet flower

Integrative lipidomics profile uncovers the mechanisms underlying high-level α-linolenic acid accumulation in Paeonia rockii seeds

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Horticulture Research 2023年第7期10卷 152-164页

作者： Weizong Yang Ziwei Xin Lihang Xie Yuhui Zhai Yanlong Zhang lixin niu Qingyu Zhang College of Landscape Architecture and Arts Northwest A&F UniversityYangling 712100ShaanxiChina Academy of Medical Sciences Zhengzhou UniversityZhengzhou 450000China

Tree peony(Paeonia rockii)is an excellent woody oilseed crop,known for its highα-linolenic acid(ALA,∼45%)content,which is of great value for human ***,the mechanisms underlying this high-level ALA accumulation in tree peony seeds are poorly *** this study,we evaluated the dynamic changes in the lipidomic profile of *** seeds during development.A total of 760 lipid molecules were identified in *** seeds;triacylglycerol(TAG)lipid molecules showed the highest abundance and diversity,both increasing during seed ***,ALA was the predominant fatty acid at the TAG sn-3 *** further characterized two diacylglycerol acyltransferase(DGAT)genes and three phospholipid:diacylglycerol acyltransferase(PDAT)genes involved in the transfer of fatty acids to the TAG sn-3 *** expression and subcellular localization analyses suggested that PrDGATs and PrPDATs may function as endoplasmic reticulum-localized proteins in seed TAG *** vitro functional complementation analysis showed different substrate specificities,with PrPDAT2 having a specific preference for *** biological assays demonstrated that PrDGAT1,PrDGAT2,PrPDAT1-2,and PrPDAT2 promote oil ***,PrPDAT2 leads to preferential ALA in the *** findings provide novel functional evidence of the roles of PrDGAT1 and PrPDAT2,which are potential targets for increasing the ALA yield in tree peony and other oilseed crops.

关键词： synthesis. finding predominant

Integrating full-length transcriptomics and metabolomics reveals the regulatory mechanisms underlying yellow pigmentation in tree peony(Paeonia suffruticosa Andr.)flowers

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Horticulture Research 2021年第1期8卷 3242-3256页

作者： Xiaoning Luo Daoyang Sun Shu Wang Sha Luo Yaqi Fu lixin niu Qianqian Shi Yanlong Zhang College of Landscape Architecture and Art Northwest A&F UniversityYanglingChina

Tree peony(Paeonia suffruticosa Andr.)is a popular ornamental plant in China due to its showy and colorful ***,yellow-colored flowers are rare in both wild species and domesticated *** molecular mechanisms underlying yellow pigmentation remain poorly ***,petal tissues of two tree peony cultivars,“High Noon”(yellow flowers)and“Roufurong”(purple–red flowers),were sampled at five developmental stages(S1–S5)from early flower buds to full *** petal color indices(brightness,redness,yellowness,chroma,and hue angle)and the contents of ten different flavonoids were *** to“Roufurong,”which accumulated abundant anthocyanins at S3–S5,the yellow-colored“High Noon”displayed relatively higher contents of tetrahydroxychalcone(THC),flavones,and flavonols but no anthocyanin *** contents of THC,flavones,and flavonols in“High Noon”peaked at S3 and dropped gradually as the flower bloomed,consistent with the color index ***,RNA-seq analyses at S3 showed that structural genes such as PsC4Hs,PsDFRs,and PsUFGTs in the flavonoid biosynthesis pathway were downregulated in“High Noon,”whereas most PsFLSs,PsF3Hs,and PsF3’Hs were *** transcription factor(TF)genes related to flavonoid biosynthesis were also upregulated in“High Noon.”One of these TFs,PsMYB111,was overexpressed in tobacco,which led to increased flavonols but decreased ***-luciferase assays further confirmed that PsMYB111 upregulated *** results improve our understanding of yellow pigmentation in tree peony and provide a guide for future molecular-assisted breeding experiments in tree peony with novel flower colors.

关键词： yellow flowers tree

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中国野生葡萄花粉形态学研究

园艺学报 2000年第5期27卷 361-363页

作者：牛立新张延龙西北农林科技大学园艺学院陕西杨凌712100

对原产中国 2 3种或变种 ,共计 71个类型的野生葡萄及 9个其它栽培种或品种的花粉形态进行了系统观察研究。根据花粉大小 ,可将葡萄花粉分为五类 ,并给出了分类标准 ;花粉粒赤道宽与极轴长之比 (E/P) ,既可用于正常花粉的形态分类 ,又... 详细信息

对原产中国 2 3种或变种 ,共计 71个类型的野生葡萄及 9个其它栽培种或品种的花粉形态进行了系统观察研究。根据花粉大小 ,可将葡萄花粉分为五类 ,并给出了分类标准 ;花粉粒赤道宽与极轴长之比 (E/P) ,既可用于正常花粉的形态分类 ,又可作为不同种类花粉育性的形态鉴定指标 ;除巨峰为四沟孔类型外 ,其它正常花粉种类的花粉粒均为三沟孔型 ,雌能花种类的花粉无萌发沟孔存在 ;另外还对花粉壁表面孔穴大小。

关键词：葡萄属野生种花粉形态学

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秦岭芍药属植物及其地理分布修订

西北植物学报 2016年第5期36卷 1046-1054页

作者：张晓骁张延龙牛立新西北农林科技大学风景园林艺术学院陕西杨陵712100

在野外调查的基础上,结合查阅标本和文献比对,对秦岭地区芍药属(Paeonia)植物及其地理分布进行修订。结果表明,秦岭地区分布有芍药属8个野生种及1个栽培种,可分为牡丹组(Section Mouton DC.)和芍药组(***)。地理分布格局研究表明:芍药组... 详细信息

在野外调查的基础上,结合查阅标本和文献比对,对秦岭地区芍药属(Paeonia)植物及其地理分布进行修订。结果表明,秦岭地区分布有芍药属8个野生种及1个栽培种,可分为牡丹组(Section Mouton DC.)和芍药组(***)。地理分布格局研究表明:芍药组内4个种:草芍药(***)、美丽芍药(***)、芍药(***)、川赤芍(*** ***)和牡丹组中的牡丹(*** Andrews)、紫斑牡丹(***)为秦岭广布种,卵叶牡丹(***)和杨山牡丹(***)为秦岭中东部分布种,矮牡丹(***)为秦岭东部分布种。根据修订,给出了秦岭地区芍药属植物分种检索表。

关键词：芍药属牡丹组芍药组秦岭野外调查

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台湾台中市绿道规划设计及其功能的调查分析

城市发展研究 2013年第4期20卷 137-141页

作者：李天颖张延龙牛立新西北农林科技大学

伴随着城市化进程的高速发展,城市绿地系统已成为我国城市规划设计面临的重要任务,而绿道是城市绿地系统的重要组成部分。台湾台中市在绿道建设中取得了显著成效,对该市的绿道进行了实地调查,系统分析概括规划设计特点、发展历史及其主... 详细信息

伴随着城市化进程的高速发展,城市绿地系统已成为我国城市规划设计面临的重要任务,而绿道是城市绿地系统的重要组成部分。台湾台中市在绿道建设中取得了显著成效,对该市的绿道进行了实地调查,系统分析概括规划设计特点、发展历史及其主要功能(交通、防灾避难、环境教育、文化传播及提升经济价值),从而为我国内地城市绿道规划建设作参考。

关键词：台湾绿园道城市型绿道绿道功能

高强稳定型锚网索耦合支护在大断面硐室中的应用研究

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煤矿现代化 2017年第1期26卷 25-26,29页

作者：钮利新晋神能源沙坪煤业有限公司山西忻州034000

针对硐室围岩岩性差、原有支护设计不合理、无控制底板措施、高地应力作用下硐室围岩发生局部变形破坏。采取在原有一次锚网支护的基础上,采取二次锚网支护加固技术,并针对支护承载结构的薄弱部位,采用锚索对锚网支护形成的承载结构进... 详细信息

针对硐室围岩岩性差、原有支护设计不合理、无控制底板措施、高地应力作用下硐室围岩发生局部变形破坏。采取在原有一次锚网支护的基础上,采取二次锚网支护加固技术,并针对支护承载结构的薄弱部位,采用锚索对锚网支护形成的承载结构进行结构补偿的支护方式,有效的控制了硐室围岩变形,锚杆失效和载荷分布不均造成的支架承载能力降低。

关键词：硐室围岩控制变形破坏二次支护

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大采高综采工作面煤壁片帮机理及控制技术

能源与节能 2015年第2期 137-138,184页

作者：钮利新太原理工大学矿业工程学院山西太原030024 山西煤炭运销集团猫儿沟煤业公司山西河曲036500

为更好地保障煤炭生产的高效和安全,对大采高综采工作面煤壁片帮现象展开探究。首先介绍了工作面煤壁片帮的主要形式,然后对大采高综采面煤壁片帮的影响因素进行了分析和总结,并就如何有效控制片帮现象的发生提出几点见解。

关键词：大采高综采工作面煤壁片帮控制机理控制技术

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不同方法提取‘凤丹’牡丹籽油品质比较

食品科学 2017年第1期38卷 136-141页

作者：白章振张延龙于蕊李健牛立新西北农林科技大学风景园林艺术学院陕西杨凌712100 西北农林科技大学林学院陕西杨凌712100

采用超临界CO_2萃取法、冷榨法和有机溶剂浸提法对‘凤丹’牡丹(Paeonia?ostii?‘Fengdan’)籽油进行提取,研究不同提取方法对牡丹籽油的出油率、理化特性、脂肪酸组成及体外抗氧化能力的影响。结果表明:3种方法中以有机溶剂浸提法的出... 详细信息

采用超临界CO_2萃取法、冷榨法和有机溶剂浸提法对‘凤丹’牡丹(Paeonia?ostii?‘Fengdan’)籽油进行提取,研究不同提取方法对牡丹籽油的出油率、理化特性、脂肪酸组成及体外抗氧化能力的影响。结果表明:3种方法中以有机溶剂浸提法的出油率最高(28.61%),超临界CO_2萃取居中(28.17%),冷榨法最低(19.14%);3种提取方法对牡丹籽油的皂化值、折光指数、相对密度影响差异不大,而对牡丹籽油的酸值、过氧化值、碘值、水分及挥发物和颜色等方面影响差异较大;3种方法对牡丹籽油主要脂肪酸组成和相对含量无显著影响,对体外抗氧化能力有显著影响,以指标1,1-二苯基-2-三硝基苯肼自由基清除率和半最大效应浓度(EC_(50))计,体外抗氧化能力依次为有机溶剂浸提法>冷榨法>超临界CO_2萃取法。3种方法各有特点,相比之下冷榨法成本少,操作简单,工艺流程简单,安全性好,更适宜牡丹籽油提取。

关键词：理化指标脂肪酸组成 α-亚麻酸抗氧化能力