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玉米醇溶蛋白-海藻酸钠纳米颗粒的制备及其负载姜黄素的研究
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作者 翁玲 张彦慧 +1 位作者 张若宁 毛立科 《中国食品添加剂》 CAS 2024年第3期25-34,共10页
采用反溶剂法制备玉米醇溶蛋白-海藻酸钠纳米颗粒,并用于负载姜黄素的复合纳米颗粒。探究不同质量的海藻酸钠对纳米颗粒环境稳定性的影响及形成纳米颗粒相互作用机制。当负载相同含量的姜黄素时,海藻酸钠的含量对纳米颗粒中姜黄素包埋... 采用反溶剂法制备玉米醇溶蛋白-海藻酸钠纳米颗粒,并用于负载姜黄素的复合纳米颗粒。探究不同质量的海藻酸钠对纳米颗粒环境稳定性的影响及形成纳米颗粒相互作用机制。当负载相同含量的姜黄素时,海藻酸钠的含量对纳米颗粒中姜黄素包埋率、负载率、光稳定性、热稳定性的影响。研究结果表明,静电吸引、氢键和疏水效应是形成复合纳米颗粒的主要驱动力。玉米醇溶蛋白纳米颗粒被海藻酸钠包覆,在宽pH值范围内、高温和盐浓度下保持稳定。当海藻酸钠与姜黄素含量比为20∶3时,包埋率达到最大,为76.02%。海藻酸钠的添加显著提高了姜黄素的包封效率、负载能力以及光稳定性。因此,玉米醇溶蛋白复合纳米颗粒对于保护疏水性生物活性化合物具有良好的应用前景。 展开更多
关键词 玉米醇溶蛋白 海藻酸钠 姜黄素 纳米颗粒 稳定性
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辽宁省泥石流与不同时间尺度下降水因子的关系研究 被引量:1
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作者 曹永强 张若凝 +2 位作者 李玲慧 路洁 宁月 《灾害学》 CSCD 北大核心 2021年第3期51-56,共6页
辽宁省地处中国北方降水性泥石流多发地带,收集了辽宁省1980—2019年由强降水引发的386起泥石流统计资料,采用GIS空间分析、统计分析等方法,探究该省泥石流与不同时间尺度降水因子的关系,同时研究短期内不同有效降水阈值对泥石流发生概... 辽宁省地处中国北方降水性泥石流多发地带,收集了辽宁省1980—2019年由强降水引发的386起泥石流统计资料,采用GIS空间分析、统计分析等方法,探究该省泥石流与不同时间尺度降水因子的关系,同时研究短期内不同有效降水阈值对泥石流发生概率的影响。结果表明:长时间尺度上,泥石流频次与雨季降水量、年暴雨雨量、年大暴雨日数的线性关系最强,与其他降水因子线性关系不明显。泥石流频次与短期有效降水量的相关程度由高到低依次为当日有效降水量、前3 d累计有效降水量、前7 d累计有效降水量。不同前期有效降水阈值下,泥石流发生概率不同,当日有效降水量达50 mm、前3 d累计有效降水量达到77mm或前7 d累计有效降水量达142 mm,有50%的概率会发生泥石流。泥石流风险预测要综合考虑地形地貌与下垫面物质等地理环境特征。 展开更多
关键词 泥石流 降水 空间分析 统计分析 风险预测 辽宁省
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辽宁省玉米水分生产率时空变化规律及影响因素 被引量:1
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作者 曹永强 李玲慧 +2 位作者 路洁 张若凝 宁月 《南水北调与水利科技(中英文)》 CAS 北大核心 2020年第6期201-208,共8页
基于2005-2017年辽宁省14个地级市玉米种植数据、灌溉用水量及气象数据等资料,运用线性倾向估计及全局空间自相关分析等方法,从不同地区、不同降水年型(枯、平、丰)角度出发,分析不同玉米水分生产率指标的时空变化规律及其影响因素,结... 基于2005-2017年辽宁省14个地级市玉米种植数据、灌溉用水量及气象数据等资料,运用线性倾向估计及全局空间自相关分析等方法,从不同地区、不同降水年型(枯、平、丰)角度出发,分析不同玉米水分生产率指标的时空变化规律及其影响因素,结果表明:在时间尺度上,全省玉米灌溉水分生产率多年平均值为1.63kg/m3,玉米水分生产率总体每10a以0.04kg/m3的速率波动上升;在空间尺度上,全省玉米灌溉水分生产率均值呈现出西北高、东南低的空间分异,玉米水分生产率在枯水年(2006)和平水年(2007)总体均表现为东北高、西南低,而丰水年(2012)则表现为西北高、东南低;玉米单产量是影响各水分生产率指标最显著的因素。该研究成果可为提高辽宁省农业用水效率、缓解水资源压力提供一定参考。 展开更多
关键词 水分生产率 时空变化 农业用水 玉米 辽宁省
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辽宁省降雨型泥石流环境特征及分类预警 被引量:1
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作者 曹永强 张若凝 范帅邦 《华北水利水电大学学报(自然科学版)》 北大核心 2022年第2期60-68,共9页
基于辽宁省降雨型泥石流灾害特点,分析泥石流环境因子特征,运用地理探测器探究影响因子对泥石流空间分布的贡献权重,并探究不同环境背景下泥石流发生的前期有效降水量。结果表明:泥石流发生点主要位于海拔100~700 m、坡度大于10°... 基于辽宁省降雨型泥石流灾害特点,分析泥石流环境因子特征,运用地理探测器探究影响因子对泥石流空间分布的贡献权重,并探究不同环境背景下泥石流发生的前期有效降水量。结果表明:泥石流发生点主要位于海拔100~700 m、坡度大于10°的低山丘陵上,土壤砂性较高,多为棕壤土和棕壤性土,以旱地、林地为主;暴雨日数与土壤类型、植被类型、高程的交互作用对泥石流空间分布密度贡献值最高,泥石流风险预测要充分考虑多个因子共同作用的影响;诱发第一、二、三类泥石流的当日有效降雨量均值分别为59、90、110 mm,前3日累计有效降雨量均值分别为91、115、135 mm,前7日累计有效降雨量均值分别为90、120、152 mm。该研究成果可为灾害预警及防治工作提供理论参考。 展开更多
关键词 泥石流 影响因子 危险度 辽宁省
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油凝胶作为氢化油脂替代物的研究进展 被引量:5
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作者 张若宁 张彦慧 +2 位作者 刘楠 高彦祥 毛立科 《中国食品添加剂》 CAS 北大核心 2022年第8期222-234,共13页
减少氢化油脂的使用是目前食品工业面临的一个重要问题。油凝胶是利用凝胶剂自组装形成网络结构并将液态植物油束缚,形成的半固体类脂肪的油脂混合体系。油凝胶保留了植物油的健康属性,具有与固态脂肪相似的理化特性,可以替代氢化油脂... 减少氢化油脂的使用是目前食品工业面临的一个重要问题。油凝胶是利用凝胶剂自组装形成网络结构并将液态植物油束缚,形成的半固体类脂肪的油脂混合体系。油凝胶保留了植物油的健康属性,具有与固态脂肪相似的理化特性,可以替代氢化油脂并减少其在食品中的添加量。通过选择合适的油凝胶剂、控制制备工艺参数,可以有效调控结构特性,包括固体脂肪含量、结晶和熔融行为、流变学,从而使油凝胶具有与氢化油脂更相似的应用品质。当应用在烘焙食品、糖果、乳制品等食品中,油凝胶和商业氢化油有相似品质属性,感官品评接受度良好。本文主要综述油凝胶剂结构性质、油凝胶制备方法和结构影响因素、应用特点等方面的研究进展,以期为减少氢化油脂的使用提供思路。 展开更多
关键词 油凝胶 植物油 油凝胶剂 脂肪替代物
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市售中式糕点产能营养素及能量密度评价 被引量:2
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作者 张若宁 王雨卓 +1 位作者 王薇妍 梁建芬 《食品科技》 CAS 北大核心 2020年第9期155-161,共7页
中式糕点是我国居民非常重要的一类食品。文章采用单位体积能量表征产品的能量密度,通过对这类食品产能营养素的含量及能量密度评价,旨在为消费者提供健康饮食的建议,也为传统糕点产业的新产品开发提供理论依据。结果显示,大多数的中式... 中式糕点是我国居民非常重要的一类食品。文章采用单位体积能量表征产品的能量密度,通过对这类食品产能营养素的含量及能量密度评价,旨在为消费者提供健康饮食的建议,也为传统糕点产业的新产品开发提供理论依据。结果显示,大多数的中式糕点具有典型的甜、香的感官品质,易对消费者产生愉悦感,引起进食量增加。总体上,中式糕点多为水分含量低,蛋白质、糖、脂肪含量高的食品,能量密度较高。其中,以绿豆为主要原料的糕点脂肪含量比较低,蛋白质含量高达12.39%,产品黏度高,可增强饱腹感。糖醇作为代糖应用时,可显著降低食品的可溶性糖含量,从而降低其能量密度。蛋糕类的糕点水分含量可达20%,明显高于其他品类,质地膨松柔软,单位体积能量密度最低,但是含糖量高;酥类和水油皮类糕点营养成分含量相似,高糖、高脂肪含量以支持产品酥、香的口感,产品能量密度高。消费者选用豆类为原料糕点,增加饱腹感和蛋白质营养;选择糖醇类糕点降低蔗糖摄入;食用相同体积时选用蛋糕类和其他类糕点,能量较低。建议企业采用如水溶性多糖、乳化剂等原料组成的脂肪替代品减少和替代饱和脂肪,采用豆类原料增加蛋白质含量,采用部分代糖降低蔗糖含量。 展开更多
关键词 中式糕点 能量密度 营养成分 感官品质 饱腹感
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Ann Paludan and Her Story of Stones Dedicated to Adrian Wang
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作者 zhang ruoning 《Voice of Friendship》 2016年第2期24-30,共7页
China,with its impressive heritage of ancient carved stones,also has a long history of research aimed at understanding the stones and their characters.Epigraphy boomed during the Song Dynasty(960-1279),with specialist... China,with its impressive heritage of ancient carved stones,also has a long history of research aimed at understanding the stones and their characters.Epigraphy boomed during the Song Dynasty(960-1279),with specialists enthusiastically engaged in collecting and studying written records about carvings of previous dynasties.Because modern archaeology started late in China—the result of 展开更多
关键词 engaged HERITAGE impressive ancient SPECIALISTS COLLECTING DYNASTY aimed camera JOURNEY
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CPAFFC Delegation Led by President Chen Haosu Attends UCLG World Council Meeting
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作者 zhang ruoning 《Voice of Friendship》 2009年第2期28-28,共1页
ACPAFFC delegation headed by its president Chen Haosu attended the UCLG World Council Meeting in Istanbul, Turkey from November 27 to 30, 2008. Over 320 local govern- ment leaders from all parts of the world participa... ACPAFFC delegation headed by its president Chen Haosu attended the UCLG World Council Meeting in Istanbul, Turkey from November 27 to 30, 2008. Over 320 local govern- ment leaders from all parts of the world participated in the meeting, at which the nomination of Ted Ellis, mayor of Bafflon, Indiana State, 展开更多
关键词 headed DELEGATION PRESIDENT govern attended TURKEY
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CPAFFC President Chen Haosu Leads Delegation to Local Government Climate Change Leadership Summit
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作者 zhang ruoning 《Voice of Friendship》 2009年第Z1期48-48,共1页
From June 1 to 10, a CPAFFC delegation led by its president Chen Haosu attended the Local Government Climate Change Leadership Summit and the UCLG World Council Meeting in Copenhagen, Demark. The
关键词 LEADERSHIP DELEGATION PRESIDENT attended drought s
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New Leadership of UCLG ASPAC Elected
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作者 zhang ruoning 《Voice of Friendship》 2008年第5期46-46,共1页
ACPAFFC Delegation headed by its president Chen Haosu attended the Second UCLG ASPAC Congress in Pattaya, Thailand from July 14 to 19. With the theme "Sustainable Cities and Local Governments for a Sustainable Wo... ACPAFFC Delegation headed by its president Chen Haosu attended the Second UCLG ASPAC Congress in Pattaya, Thailand from July 14 to 19. With the theme "Sustainable Cities and Local Governments for a Sustainable World", the congress organized four theme forums and eight workshops. Thai Deputy Prime Minister Sahas Bunditkul was present at the opening ceremony. 展开更多
关键词 LEADERSHIP headed CEREMONY MINISTER Thailand presi
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CPAFFC President Chen Haosu Leads Delegation to Attend 2nd UCLG World Congress in Jeju, ROK
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作者 zhang ruoning 《Voice of Friendship》 2008年第1期6-8,共3页
A CPAFFC delegation headed by its president Chen Haosu attended the Second World Congress of United Cities and Local Governments (UCLG) in Jeju, the Republic of Korea from October 27 to November 1, 2007. With "Ch... A CPAFFC delegation headed by its president Chen Haosu attended the Second World Congress of United Cities and Local Governments (UCLG) in Jeju, the Republic of Korea from October 27 to November 1, 2007. With "Changing Cities Are Driving Our World" as its theme, the Congress consisted of UCLG statutory meetings, plenary sessions, forums and the world urban fair. Twenty forums on spe- 展开更多
关键词 headed DELEGATION PRESIDENT attended REPUBLIC Mini
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CPAFFC President Chen Haosu Attends UCLG-ASPAC Council Meeting
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作者 zhang ruoning 《Voice of Friendship》 2007年第4期33-33,共1页
A CPAFFC delegation headed by its president Chen Haosu attended the meetings of the Executive Bureau and the Council of United Cities and Local Governments-Asia Pacific Regional Section (UCLG-ASPAC) and the Annual Reg... A CPAFFC delegation headed by its president Chen Haosu attended the meetings of the Executive Bureau and the Council of United Cities and Local Governments-Asia Pacific Regional Section (UCLG-ASPAC) and the Annual Regional Training Forum with the themes of "Investment Climate: Economic Development and Employment Growth; City Cleanliness: Environmental Sustainability" in Batam, Indonesia from April 14 to 17. About 200 local government representatives from Indonesia and other countries and regions in the Asia Pacific region participated in the meeting. Chen Haosu who is also president of UCLG-ASPAC made an opening speech at the Annual Training Forum, in which he called on UCLG-ASPAC members to join the efforts to make the Second UCLG World Congress that would be held in Jeju, ROK in October this year a grand gathering of solidarity of local governments the world over and to show the achievement of unity and cooperation of the Asia Pacific region. At the Annual Training Forum, Liu Yang, deputy director of the Foreign Affairs Office of the Beijing Municipal Government, spoke on the theme of "Investment Climate". He gave an account of the efforts made and results achieved by Beijing in creating a favourable investment environment. Members of the next UCLG World Council and World Executive Bureau were elected at the meeting. Beijing was elected member of the World Council and the Executive Bureau. 展开更多
关键词 cooperation EMPLOYMENT DIRECTOR PRESIDENT DEPUTY T
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CPAFFC President Chen Haosu Leads Delegation to Australia to Attend UCLG ASPAC Meeting
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作者 zhang ruoning 《Voice of Friendship》 2006年第4期25-25,共1页
关键词 AUSTRALIA headed DELEGATION concerning FORMALLY at
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CPAFFC Delegation Attends Fourth World Water Forum
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作者 zhang ruoning 《Voice of Friendship》 2006年第4期34-34,共1页
关键词 DELEGATION headed Jiangsu DEPUTY govern AWARENESS
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China-Europe People-to-People Dialogue on Friendship and Cooperation Held in Beijing and Tianjin
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作者 zhang ruoning 《Voice of Friendship》 2011年第4期6-7,共2页
"The world today is experiencing profound adjustments and world economic recovery faces increasing uncertain and unstable factors. As the world multi-polarization and economic globalization move forward, China an... "The world today is experiencing profound adjustments and world economic recovery faces increasing uncertain and unstable factors. As the world multi-polarization and economic globalization move forward, China and Europe have become more interdependent, share more interests and shoulder more common responsibilities." 展开更多
关键词 Tianjin GLOBALIZATION uncertain UNSTABLE SHOULDER
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EU Climate Change Exhibition Held
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作者 zhang ruoning 《Voice of Friendship》 2008年第4期20-20,共1页
On April 25, the CPAFFC, the China-EU Association (CEUA) and the Delegation of the European Commission to China jointly held the opening ceremony for the EU Exhibition on Climate Change in the CPAFFC. He Luli, former ... On April 25, the CPAFFC, the China-EU Association (CEUA) and the Delegation of the European Commission to China jointly held the opening ceremony for the EU Exhibition on Climate Change in the CPAFFC. He Luli, former vice chairperson of the NPC Standing Committee and honorary president of the CEUA, Jose Manuel Barroso, president of the European Commission, and Li Jianping, vice president of the CPAFFC, attended the opening ceremony and made speeches. Honorary President He Luli highly praised the achievements made by China and the EU in their longtime cooperation of mutual benefits in various fields including environmental protection. She said, for many years China and EU have both committed to the development of all-round strategic partnership and establishment of a multi-level mechanism of political dialogue. She expressed, with increasing enthusiasm the CEUA would continue to actively carry out nongovernmental exchanges between China and the EU, and promote cooperation between the two sides in the fields of economy, society, environmental protection, science and technology, culture, etc. 展开更多
关键词 COOPERATION CEREMONY POLITICAL EXHIBITION presiden
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