检索结果-南通市图书馆

猕猴桃果实采后成熟衰老与植物生长调节物质的关系

在线全文

学校读者我要写书评

暂无评论

北方园艺 2011年第24期 228-231页

作者：张计育周振兴宣继萍贾晓东郭忠仁江苏省中国科学院植物研究所江苏南京210014 江苏省农业委员会江苏南京210036

猕猴桃含有丰富的营养价值和独特的保健功能,被誉为"水果之王";属于呼吸跃变型果实,在采后贮藏过程中,容易成熟软化;植物生长调节物质在果实成熟衰老过程中起着非常重要的作用。现对植物生长调节物质与猕猴桃果实成熟衰老之间的关系进... 详细信息

猕猴桃含有丰富的营养价值和独特的保健功能,被誉为"水果之王";属于呼吸跃变型果实,在采后贮藏过程中,容易成熟软化;植物生长调节物质在果实成熟衰老过程中起着非常重要的作用。现对植物生长调节物质与猕猴桃果实成熟衰老之间的关系进行了综述,以其为今后猕猴桃果实采后机理以及果实贮藏保鲜技术的研究提供参考。

关键词：猕猴桃成熟衰老植物生长调节物质

Transforming waste particles into valuable adsorbents via amyloid-mediated molecular engineering

在线全文

学校读者我要写书评

暂无评论

Science China Chemistry 2025年第1期68卷 317-328页

作者： Qingmin Yang Jian Zhao Yujia Zhang Xingyu Zhou Hao ren Bowen Hu zhongli Lei Lixin Chen Peng Yang School of Material and Chemical Engineering Bengbu University Anhui Provincial Engineering Laboratory of Silicon-Based Materials School of Chemistry and Chemical Engineering Northwestern Polytechnical University Key Laboratory of Applied Surface and Colloid Chemistry Ministry of Education School of Chemistry and Chemical EngineeringShaanxi Normal University Xi'an Key Laboratory of Polymeric Soft Matter School of Chemistry and Chemical Engineering Shaanxi Normal University International Joint Research Center on Functional Fiber and Soft Smart Textile School of Chemistry and Chemical EngineeringShaanxi Normal University

The high-value utilization of industrial solid waste using a facile and eco-friendly process is of great interest and significance in reducing environmental pollution and developing a green circular economy. Herein, we propose an amyloid-mediated molecular engineering strategy to transform particulate waste into valuable adsorbents for metal ions. Our method has the advantage of aqueous solution fabrication under mild conditions without the use of high-temperature hydrothermal methods and toxic chemical reagents. Amyloid-mediated molecular engineering manipulates the phase transition of bovine serum albumin(BSA)on particulate waste surfaces, resulting in a remarkable ～3.1 times improvement in the adsorption capacity of fly ash, a typical industrial solid waste for gold ions after modification with the phase-transitioned BSA(PTB). The resultant adsorption ability was 69–1,980 times higher than those of conventional and emerging adsorbent materials such as ion exchange resins, activated carbon(AC), covalent organic frameworks(COFs), and metal-organic frameworks(MOFs). We further demonstrated the application of our PTB-modified materials in the recovery of precious metals from low-grade gold ore and electronic waste leachates. Consequently, this strategy could increase the value of waste materials nearly 27 times. In addition, this method is generally extendable to other conventional industrial adsorbents such as resin, clay, and Al2O3, and enhances their adsorption capabilities at least twofold. Overall, this work provides a simple and green approach for improving the adsorption performance of solid particles, and is expected to develop into a universal strategy for transforming waste particles into high-value-added products.

关键词： amyloid-like protein aggregates surface engineering fly ash solid waste adsorption

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

大别山冬青扦插繁殖技术研究

北方园艺 2012年第1期 110-112页

作者：李乃伟李云龙王传永陆小清郭忠仁江苏省中国科学院植物研究所(南京中山植物园) 江苏南京210014

以8a生大别山冬青为试材,研究了插穗年龄、扦插季节、扦插基质、生根激素种类及浓度对大别山冬青生根的影响。结果表明:适宜大别山冬青扦插的条件为1a生插穗、7月份扦插、泥炭土和珍珠岩(体积比1∶1)的混合基质、2 000mg/L的IBA处理;各... 详细信息

以8a生大别山冬青为试材,研究了插穗年龄、扦插季节、扦插基质、生根激素种类及浓度对大别山冬青生根的影响。结果表明:适宜大别山冬青扦插的条件为1a生插穗、7月份扦插、泥炭土和珍珠岩(体积比1∶1)的混合基质、2 000mg/L的IBA处理;各因素对大别山冬青扦插生根均具有显著影响,其中,插穗年龄和扦插季节的各处理间生根率差异达极显著水平。

关键词：大别山冬青扦插繁殖生根激素

薄壳山核桃MADS-box基因CiMADS9的克隆与功能分析

在线全文

学校读者我要写书评

暂无评论

园艺学报 2015年第6期42卷 1049-1056页

作者：张计育莫正海李永荣王刚宣继萍贾晓东郭忠仁江苏省中国科学院植物研究所南京210014 南京绿宙薄壳山核桃科技有限公司南京210007

以薄壳山核桃(Carya illinoinensis)‘马罕’雄花为材料,利用获得的MADS-box基因保守片段设计特异引物,通过RACE技术克隆MADS-box家族基因的c DNA序列,命名为Ci MADS9。该基因长为1 077 bp,开放阅读框(ORF)768 bp,编码255个氨基酸残基... 详细信息

以薄壳山核桃(Carya illinoinensis)‘马罕’雄花为材料,利用获得的MADS-box基因保守片段设计特异引物,通过RACE技术克隆MADS-box家族基因的c DNA序列,命名为Ci MADS9。该基因长为1 077 bp,开放阅读框(ORF)768 bp,编码255个氨基酸残基。生物信息学分析表明该基因具有典型的MADS-box结构域和半保守的K区,是MIKC型MADS-box基因。聚类分析分析表明该基因属于AGL15亚家族。实时荧光定量PCR结果表明,Ci MADS9在生殖器官(雄花、雌花、幼果)中的表达量高于营养器官(叶、枝条)中的,并且在雄花中的表达量最大。将目的基因通过农杆菌介导法转化拟南芥,获得了转基因植株。与对照相比,转基因拟南芥中过量表达该基因使植株开花延期,基生叶增加。

关键词：薄壳山核桃花器官发育 Ci MADS9 基因表达功能分析

Bacterial indole-3-propionic acid inhibits macrophage IL-1β production through targeting methionine metabolism

在线全文

学校读者我要写书评

暂无评论

Science China Life Sciences 2025年

作者： Ziyi Han Jian Fu Aiyan Gong Wenkai ren State Key Laboratory of Livestock and Poultry Breeding College of Animal Science South China Agricultural University Animal Disease-resistant Nutrition Key Laboratory of Sichuan Province Sichuan Agricultural University China Institute of Veterinary Drug Control

The gut microbiota plays key roles in host health by shaping the host immune responses through their metabolites, like indole derivatives from tryptophan. However, the direct role of these indole derivatives in macrophage fate decision and the underlying mechanism remains unknown. Here, we found that bacterial indole-3-propionic acid(IPA) downregulates interleukin-1beta(IL-1β) production in M1 macrophages through inhibition of nuclear factor-kappa B(NF-κB) signaling. Mechanistically, IPA binds specifically with methionine adenosyltransferase 2A(MAT2A) to promote S-adenosylmethionine(SAM) synthesis, which facilitates the DNA methylation of ubiquitin-specific peptidase 16(USP16, a deubiquitinase), and in turn promotes Toll-like receptor 4(TLR4) ubiquitination and NF-κB inhibition. Furthermore,IPA administration attenuates sepsis in mouse models induced by lipopolysaccharides(LPS), showcasing its potential as a microbial-derived adjunct in alleviating inflammation. Collectively, our findings reveal a newly found microbial metabolite-immune system regulatory pathway mediated by IPA.

关键词：

Joint application of feature extraction based on EMD-AR strategy and multi-class classifier based on LS-SVM in EMG motion classification

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Journal of Zhejiang University-Science A(Applied Physics & Engineering) 2007年第8期8卷 1246-1255页

作者： YAN Zhi-guo WANG Zhi-zhong ren Xiao-mei Departmen of Biomedical Engineering Shanghai Jiao Tong University Shanghai 200030 China

This paper presents an effective and efficient combination of feature extraction and multi-class classifier for motion classification by analyzing the surface electromyografic(sEMG) signals. In contrast to the existing methods,considering the non-stationary and nonlinear characteristics of EMG signals,to get the more separable feature set,we introduce the empirical mode decomposition(EMD) to decompose the original EMG signals into several intrinsic mode functions(IMFs) and then compute the coefficients of autoregressive models of each IMF to form the feature set. Based on the least squares support vector machines(LS-SVMs) ,the multi-class classifier is designed and constructed to classify various motions. The results of contrastive experiments showed that the accuracy of motion recognition is improved with the described classification scheme. Furthermore,compared with other classifiers using different features,the excellent performance indicated the potential of the SVM techniques embedding the EMD-AR kernel in motion classification.

关键词： Electromyografic signal Empirical mode decomposition (EMD) Auto-regression model Wavelet packet transform Least squares support vector machines (LS-SVM) Neural network

Gradient‑Layered MXene/Hollow Lignin Nanospheres Architecture Design for Flexible and Stretchable Supercapacitors

在线全文

学校读者我要写书评

暂无评论

Nano-Micro Letters 2025年第2期17卷 447-462页

作者： Haonan Zhang Cheng Hao Tongtong Fu Dian Yu Jane Howe Kaiwen Chen Ning Yan Hao ren Huamin Zhai Jiangsu Provincial Key Lab of Sustainable Pulp and Paper Technology and Biomass Materials NanJing Forestry UniversityNanjing 210037People’s Republic of China Department of Chemical Engineering and Applied Chemistry University of Toronto200 College StreetTorontoON M5S 3E5Canada Department of Materials Science and Engineering University of Toronto184 College StreetTorontoON M5S 3E4Canada College of Materials Science and Engineering Nanjing Forestry UniversityNanjing 210037People’s Republic of China

With the rapid development of flexible wearable electronics,the demand for stretchable energy storage devices has *** this work,a novel gradient-layered architecture was design based on single-pore hollow lignin nanospheres(HLNPs)-intercalated two-dimensional transition metal carbide(Ti_(3)C_(2)T_(x) MXene)for fabricating highly stretchable and durable *** depositing and inserting HLNPs in the MXene layers with a bottom-up decreasing gradient,a multilayered porous MXene structure with smooth ion channels was constructed by reducing the overstacking of MXene ***,the micro-chamber architecture of thin-walled lignin nanospheres effectively extended the contact area between lignin and MXene to improve ion and electron accessibility,thus better utilizing the pseudocapacitive property of *** these strategies effectively enhanced the capacitive performance of the *** addition,HLNPs,which acted as a protective phase for MXene layer,enhanced mechanical properties of the wrinkled stretchable electrodes by releasing stress through slip and deformation during the stretch-release cycling and greatly improved the structural integrity and capacitive stability of the *** electrodes and symmetric flexible all-solid-state supercapacitors capable of enduring 600%uniaxial tensile strain were developed with high specific capacitances of 1273 mF cm^(−2)(241 F g^(−1))and 514 mF cm^(−2)(95 F g^(−1)),***,their capacitances were well preserved after 1000 times of 600%stretch-release *** study showcased new possibilities of incorporating biobased lignin nanospheres in energy storage devices to fabricate stretchable devices leveraging synergies among various two-dimensional nanomaterials.

关键词： Hollow lignin nanospheres MXene Gradient-layered architecture Wrinkled electrodes Stretchable supercapacitors

在线全文

学校读者我要写书评

暂无评论

黑尾蜡嘴雀冬季对树木果实的取食作用

生物学杂志 2012年第3期29卷 20-23页

作者：史永红李新华郭忠仁南京农业大学生命科学学院南京210095 中国科学院植物研究所南京中山植物园南京210014

2009年11月至2011年2月,在江苏省南京市观察到黑尾蜡嘴雀冬季取食12种树木的果实及种子。该鸟通常咬破果皮或种皮,取食种子的胚和胚乳等营养物质,为种子捕食者。由于其他一些食果鸟类也同期取食有关树木的果实,并传播其种子,黑尾蜡嘴雀... 详细信息

2009年11月至2011年2月,在江苏省南京市观察到黑尾蜡嘴雀冬季取食12种树木的果实及种子。该鸟通常咬破果皮或种皮,取食种子的胚和胚乳等营养物质,为种子捕食者。由于其他一些食果鸟类也同期取食有关树木的果实,并传播其种子,黑尾蜡嘴雀的取食对这些树木的种子传播的影响是有限的。在初冬季节,黑尾蜡嘴雀常在树冠层取食果实,而在深冬季节,则主要在地表取食落果。黑尾蜡嘴雀能够咬碎枫杨等坚果的坚硬果皮,可为一起在地表觅食的麻雀取食种子碎屑物提供便利条件。黑尾蜡嘴雀与麻雀之间的偏利取食关系属于首次报道。文中对于城市环境管理中合理利用树木落果,为黑尾蜡嘴雀等鸟类提供越冬食物等方面提出了相关建议。

关键词：黑尾蜡嘴雀树木果实取食偏利取食

Progress of research in the application of ultrasound technology for the treatment of Alzheimer’s disease

在线全文

学校读者我要写书评

暂无评论

Neural Regeneration Research 2025年第10期20卷 2823-2837页

作者： Qiuquan Cai Lianghui Meng Meina Quan Ling Wang Jing ren Chenguang Zheng Jiajia Yang Dong Ming Academy of Medical Engineering and Translational Medicine Tianjin UniversityTianjinChina Innovation Center for Neurological Disorders Xuanwu HospitalCapital Medical UniversityBeijingChina Brain-Computer Interaction and Human-Machine Fusion Haihe Laboratory Tianjin UniversityTianjinChina Tianjin Key Laboratory of Brain Science and Neural Engineering Tianjin UniversityTianjinChina

Alzheimer’s disease is a common neurodegenerative disorder defined by decreased reasoning abilities,memory loss,and cognitive *** presence of the blood-brain barrier presents a major obstacle to the development of effective drug therapies for Alzheimer’s *** use of ultrasound as a novel physical modulation approach has garnered widespread attention in recent *** a safe and feasible therapeutic and drug-delivery method,ultrasound has shown promise in improving cognitive *** article provides a summary of the application of ultrasound technology for treating Alzheimer’s disease over the past 5 years,including standalone ultrasound treatment,ultrasound combined with microbubbles or drug therapy,and magnetic resonance imaging-guided focused ultrasound *** is placed on the benefits of introducing these treatment methods and their potential *** found that several ultrasound methods can open the blood-brain barrier and effectively alleviate amyloid-βplaque *** believe that ultrasound is an effective therapy for Alzheimer’s disease,and this review provides a theoretical basis for future ultrasound treatment methods.

关键词： Alzheimer’s disease blood-brain barrier drugs magnetic resonance imaging-guided focused ultrasound microbubbles scanning ultrasound ultrasound ultrasound stimulation