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Molecularly engineered lignin to polyphenol via organocatalysis as an active sunscreen ingredient

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Journal of Bioresources and Bioproducts 2024年第2期9卷 197-210页

作者： Yuanlong Guo Pengcheng Liu Lei Deng Changwei Lui Michael North Gang Hu Qitian Huang Zongbao Kent Zhao haibo Xie Department of Polymeric Materials&Engineering Guizhou UniversityGuiyang 550025China KZJ New Materials Group Guizhou Co.Ltd. Guizhou 551200China Green Chemistry Centre of Excellence Department of ChemistryUniversity of YorkYork YO105DDUK Dalian Institute of Chemical Physics Chinese Academy of SciencesDalian 116023China

Phenolation is one of the effective strategies to synthesize lignin-based polyphenols,improve lignin’s properties,and extend its value-added applications in biological,medicinal and cosmetic ***,by taking the structural feature advantage of lignin,an effective and green strategy was developed to molecularly engineer lignin into a robust lignin-3-(2-hydroxyphenyl)propionate ester(LPPE)derivative via a transesterification reaction between 3,4-dihydrocoumarin(DHC)and the aliphatic hydroxyls in lignin under *** strategy is optimized and the novel derivative was systematically characterized by ^(1)H,^(13)C and ^(31)P nuclear magnetic resonance(NMR)and Fourier transform infrared(FT-IR)*** findings indicated that the successful introduction of 3-(2-hydroxyphenyl)propionate groups using a OH groups/DHC/organic base mo-lar ratio of 1꞉1꞉0.3 at 120℃ for 6 h increased the content of phenolic hydroxyl groups from 1.7931 to 3.0179 mmol/g,and the LPPE exhibited excellent ultraviolet-absorbing and antioxidant per-formance with up to 90%free radical scavenging activity within 20 min using 5 mg/mL of *** addition,good biocompatibility and a high Sun protection factor(SPF)value of 40.9 were achieved at 5%(w)dosage of LPPE in the cream,indicating its significant application potential in sunscreen.

关键词： Phenolation of lignin Organocatalysis 3,4-dihydrocoumarin Antioxidant Sunscreen cream

Position Tracking Control for Permanent Magnet Linear Motor via Discrete-time Terminal Sliding Mode Control

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Position Tracking Control for Permanent Magnet Linear Motor ...

A Novel Yawing Suppression Model and Control of Robotic Fish via Stable Point

第37届中国控制会议

作者： Jin Li Xiuping Chen haibo du Wenwu Zhu Canghua Jiang Guanghui Wen School of Electrical Engineering and Automation Hefei University of Technology School of Mathematics Southeast University

In this paper, for the position control problem of permanent magnet linear motors, a digital control algorithm based on terminal sliding mode control method is proposed. At the first step, based on Euler’s discretization, the approximate discretetime model is obtained. By introducing a new discrete-time terminal sliding surface, then an improved discrete-time terminal sliding mode control method is designed. By a rigorous stability analysis, it is demonstrated that the improved discrete-time terminal sliding mode control method can offer a higher accuracy than the discrete-time linear sliding mode control method. The comparing simulation results are given to verify the effectiveness of the proposed approach.

关键词： Position control Digital control Terminal sliding mode Permanent magnet linear motors

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A Novel Yawing Suppression Model and Control of Robotic Fish...

Estimating SVCV waterborne transmission and predicting experimental epidemic development:A modeling study using a machine learning approach

第37届中国控制会议

作者： Zhenghao Li Hai Wang Yunzhi Huang haibo du Guangming Xie Shuanglong Yang Hefei University of Technology Peking University

This paper proposes a dynamic model and control for the four-joint biomimetic robotic fish with yawing *** robotic fish is composed of fusiform head,flexible body and wide caudal fin which can produce a fish body wave through the swinging of the body and tail in order to push itself *** is shown that the stable point,based on the classical function by Lighthill,is presented to control the yawing amplitude of robotic ***,the dynamic model and the influence for the position of stable point on the swimming speed of the robotic fish can be *** nonlinear central pattern generators（CPGs） are then used to control the coordinated movement of the four joints for our robotic *** results are presented in support of the effectiveness of stable point to suppress the yawing amplitude of the robotic fish.

关键词： Yawing suppression stable point dynamic model central pattern generators(CPGs)

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Water Biology and Security 2024年第1期3卷 60-70页

作者： Jiaji Pan Qijin Zeng Wei Qin Jixiang Chu haibo Jiang Haiyan Chang Jun Xiao Hao Feng State Key Laboratory of Developmental Biology of Freshwater Fish College of Life ScienceHunan Normal UniversityChangsha410081China College of Engineering and Design Hunan Normal UniversityChangsha410081China

Viral infectious diseases significantly threaten the sustainability of freshwater fish *** lack of studies on epidemic transmission patterns and mechanisms inhibits the development of containment strategies from the viewpoint of veterinary public *** study raises an epidemic mathematical model considering water transmission with the aim of analyzing the transmission process more *** basic reproduction number R0 was derived by the model parameter including the water transmission coefficient and was used for the analysis of the virus *** viremia of carp virus(SVCV)and zebrafish were used as model viruses and animals,respectively,to conduct the transmission *** through water was achieved by connecting two aquarium tanks with a water channel but blocking the fish movement between the *** the collected experimental data,we determined the optimal hybrid machine learning algorithm to analyze the transmission process using an established mathematical *** addition,future transmission was predicted and validated using the epidemic model and an optimal ***,the sensitivity of model parameters and the simulations of R0 variation were performed based on the modified complex epidemic *** study is of significance in providing theoretical guidance for minimizing R0 by manipulating model parameters with containment *** importantly,since the modified model and algorithm demonstrated better performance in handling freshwater fish transmission problems,this study advances the future application of transmissible disease modeling with larger datasets in freshwater fish aquaculture.

关键词： Epidemic mathematical model Hybrid machine learning algorithm Reproduction number Sensitivity analysis SVCV transmission

科技成果转移转化人员收益分配模式的实践与探索--以对中国科学院15家院属单位调研为基础

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中国科学院院刊 2024年第6期39卷 1060-1071页

作者：姚畅杜伟张超王春博刘海波中国科学院大学公共政策与管理学院北京100049 中国科学院科技战略咨询研究院北京100190 中国科学院理化技术研究所北京100190 中国科学院大连化学物理研究所大连116023

科技成果转移转化(以下简称“转移转化”)作为实现科技向生产力和经济发展转变的关键,是提升科技创新体系运转效能、发展新质生产力的重要一环。目前,我国促进转移转化的政策内容不断充实、覆盖范围愈加全面,但产学研用衔接难、技术转... 详细信息

科技成果转移转化(以下简称“转移转化”)作为实现科技向生产力和经济发展转变的关键,是提升科技创新体系运转效能、发展新质生产力的重要一环。目前,我国促进转移转化的政策内容不断充实、覆盖范围愈加全面,但产学研用衔接难、技术转化比例与效率双低、知识产权运营及转移转化服务专业度不够等直接影响转移转化的难题,仍未得到很好解决。一个重要原因是转移转化人员的收益分配模式不能有效匹配相关人员的工作属性和贡献,从而导致未能充分发挥转移转化人员的专业积极性。本研究从分析现有收益分配模式的问题入手,调研了15家中国科学院院属单位转移转化收益分配情况,对比国外成功案例与中国科学院案例收益分配模式的异同,分析造成收益分配模式不合理的学术和实践原因,提出工作建议,为转移转化工作的提质增效提供新思路。

关键词：科技成果转移转化人员收益分配模式案例分析

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安全生产信息化的建设与应用

氯碱工业 2022年第7期58卷 43-45页

作者：杜海波翟鲁波山东鲁泰化学有限公司山东济宁272350

通过安全生产信息化的建设与应用,企业实现双重预防机制、风险监测预警、人员定位、视频智能分析、作业许可管理等功能。并结合GIS卫星地图服务,将企业安全相关信息与数据进行实时展示,提高企业风险管控能力,提升企业本质安全水平。

关键词：安全生产信息化风险管控

土地利用冲突特征识别及驱动力分析——以滇中城市群为例

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山地学报 2024年第2期042卷 210-224页

作者：周泽全斌张海波衡阳师范学院地理与旅游学院联合国教科文组织国际自然与文化遗产空间技术中心衡阳分中心

识别土地利用冲突演变特征及驱动机制，是确定区域国土资源配置可持续发展路径的基础。单一的土地利用分析方法，对地类内部间转化的更多潜在信息挖掘不足，致使冲突演变过程中的地类变化状态特征不够明确。本研究以滇中城市群为研究对... 详细信息

识别土地利用冲突演变特征及驱动机制，是确定区域国土资源配置可持续发展路径的基础。单一的土地利用分析方法，对地类内部间转化的更多潜在信息挖掘不足，致使冲突演变过程中的地类变化状态特征不够明确。本研究以滇中城市群为研究对象，构建土地利用转换图谱直观表达土地利用的转换模式；从景观斑块的角度构建土地利用冲突测算模型识别滇中城市群1990—2020年土地利用冲突；将变化成分方法和强度分析方法相结合，探讨不同冲突演变下各地类的增加和减少强度特征；基于斑块生成模型(PLUS),揭示土地利用冲突驱动机制。研究结论：(1)土地利用强度指数由0.11%增长到0.79%,以交换变化为主，耕地和建设用地的数量变化显著，且耕地趋向性转变为建设用地。土地利用平均冲突指数增长了0.07,在空间上呈现西强东弱的分布特征，集中表现在东部地势平坦的耕地、林地和草地被建设用地侵占。耕地数量的减少主要受人口密度的影响，建设用地的扩张则受人口密度和GDP的影响较大。土地利用冲突与地类之间剧烈的转换密不可分，在冲突增强的区域，建设用地的增加强度和耕地的减少强度较大，且耕地和草地减少、建设用地的增加强度活跃。(2)兼顾自然禀赋大的生态用地和脆弱耕地的可持续利用是城市发展的必然选择。山地城市群土地利用冲突的缓解需重点保护地势平坦的生态用地。山地城市的开发建设需规避耕地、基本农田碎片化的风险。缓解高原山地城市群土地利用冲突的关键在于严格控制人口高度聚集和客观追求经济发展。本研究可为滇中城市群的国土空间动态监测和山地城市群的城市规划和土地可持续发展提供依据和参考。

关键词：土地利用冲突景观格局强度分析驱动力滇中城市群

Edible prodelphinidins that improve postprandial hyperglycemia were first discovered in Chinese bayberry(Myrica rubra Sieb. et Zucc.) fruits

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Food Science and Human Wellness 2024年

作者： Yi Wang Laiming Zhang Jiaxiong Wu Chengxiao Yu Xingqian Ye haibo Pan Shiguo Chen Ningbo Research Institute Zhejiang University College of Biosystems Engineering and Food Science Zhejiang Key Laboratory for Agro-Food Processing Integrated Research Base of Southern Fruit and Vegetable Preservation Technology Zhejiang International Scientific and Technological Cooperation Base of Health Food Manufacturing and Quality Control Zhejiang University Zhejiang University Zhongyuan Institute Innovation Center of Yangtze River Delta Zhejiang University

Plant polyphenols are potential substitutes for clinical α-glucosidase inhibitors. Our previous studies indicated that prodelphinidins from Chinese bayberry leaves (BLPs) have stronger α-glucosidase inhibitory activity than other common polyphenols， but they have no safe history of consumption. There is a reasonable prospect that prodelphinidins from Chinese bayberry fruits (BFPs) can improve postprandial hyperglycemia， though known active components are only myricetin and cyanidin-3-O-glucoside. Hence， the aim of this study was to analyze structure and hypoglycemic effect of BFPs of “Biqi” (BQPs) and “Dongkui” (DKPs) cultivars， and compare their difference with BLPs. The contents of BQPs and DKPs were (221.73±0.60) and (136.82±4.33) mg EC equivalents/g dry weight， respectively. The most subunits were EGCG along with a small amount of EGC， ECG and EC connected by B-type linkages and a small portion of A-type linkages with mean polymerization degree of 4.25 and 4.08， respectively. Importantly， BQPs and DKPs were α-glucosidase inhibitors with IC50of 11.91 and 9.47 μg/mL respectively， which were significantly stronger than BLPs. DKPs could also improve postprandial hyperglycemia of normal mice and high fat diet-induced type Ⅱ diabetic mice. Therefore， edible prodelphinidins， which have stronger hypoglycemic effect than BLPs， were first found in Chinese bayberry fruits.

关键词：

Excel在水质分析标准曲线及回归方程截距检验计算中的应用

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水文 2011年第3期31卷 88-89,81页

作者：杜海波甘肃省临洮水文水资源勘测局甘肃临洮730500

在水质分析标准曲线及回归方程截距检验的统计计算工作中,为解决日常工作中经常遇到的计算容易出错、各种计算方法及过渡数据有效位数的人为取舍对计算结果的一致性影响较大等问题,就如何应用计算机Excel计算模板快速准确地完成上述有... 详细信息

在水质分析标准曲线及回归方程截距检验的统计计算工作中,为解决日常工作中经常遇到的计算容易出错、各种计算方法及过渡数据有效位数的人为取舍对计算结果的一致性影响较大等问题,就如何应用计算机Excel计算模板快速准确地完成上述有关计算工作进行探讨;阐述了应用Excel计算模板的方法原理,介绍了计算模板的建立、验证、应用、保存、借用等实用经验;在相关计算工作的快速准确及提高工作效率等方面得到了满意的结果。

关键词： Excel 计算模板水质分析标准曲线截距检验