Results 141 to 150 of about 2,125,466 (224)

一种由烯烃氢甲酰化制取有机醛的生产方法

, 2003
一种由烯烃氢甲酰化制取各类有机醛的生产过程，采用多相催化剂匀相化方法研制的催化剂，浆态床反应工艺，气、液体产品和浆态液与催化剂分离，气、液体产品与浆态液分离及催化剂循环使用等组成。该催化过程产生的液体产品经简单过滤后与催化剂分离，浆态液与产品经闪蒸分离或精馏后可直接作为比相应的烯烃多一个碳数的有机醛。所生产的有机醛经加氢后可生产相应的醇。由本发明的催化过程可用于各种增塑剂的有机伯醇的生产 ...
严丽, 吕元, 朱何俊, 丁云杰
core  

浅谈《野生动物保护法》的合理利用制度

野生动物学报, 2003
野生动物是我国一项宝贵的自然资源,1988年全国人大常委会颁布了《野生动物保护法》,使野生动物保护工作开始步入法制化、规范化管理的轨道。《野生动物保护法》颁布十几年来,在党中央和各级人民政府的领导下 ...
邹丽梅, 王跃先
doaj  

A Wearable Colorimetric Sensor for Ultraviolet Monitoring via Radical‐Triggered Gold Nanoparticle Clustering

Rare Metals, Volume 45, Issue 6, June 2026.
ABSTRACT Reliable monitoring of ultraviolet (UV) radiation is critical for protecting human health, yet existing sensors often rely on costly or rigid components that hinder portability. Here we report a wearable, low‐cost colorimetric sensor for quantitative UV dosimetry, enabled by radical‐triggered aggregation of gold nanoparticles (AuNPs).
Yahuang Li, Huixi Guo, Minghao Huang, Lei Zhang, Qinxia Wu, Qiushui Chen, Lili Xie   +6 more
wiley   +1 more source

甲酸气相催化脱水制备高纯一氧化碳的方法

, 2001
一种实验室和小规模生产高纯ＣＯ的方法，是一种甲酸气相催化脱水制备高纯ＣＯ的方法。反应温度为１５０—350℃，空速为０．１—１．０ｈ-1,催化剂为酸性陶瓷环、活性炭、Al2O3、ZrO2、ＭｇＯ等。本发明生产ＣＯ的方法，甲酸转化率大于９５％，ＣＯ纯度大于９９．５％。催化剂制备简单，价格便宜，使用寿命长。对设备的腐蚀及环境的污染小 ...
刘菁, 李德才, 徐杰
core  

[Determination of 13 prohibited alkaloids in essential oil-based cosmetics by ultra performance liquid chromatography-tandem mass spectrometry combining QuEChERS purification]. [PDF]

Se Pu
Liu Z, Wang YM, Pan JB, Zong LL, Song YH, Sun XJ, Chen HY.   +6 more
europepmc   +1 more source

Upcycling of Waste Polyethylene Terephthalate Plastics to Fabricate Cobalt–Nickel Metal–Organic Frameworks and Their Phosphides for Efficient Oxygen Evolution Reaction

Rare Metals, Volume 45, Issue 6, June 2026.
ABSTRACT The urgent environmental crisis caused by polyethylene terephthalate (PET) waste necessitates efficient upcycling strategies. Herein, we establish a novel pathway to transform waste PET plastic into a high‐performance catalytic material for mediating the oxygen evolution reaction (OER). Through a one‐step hydrothermal process, waste PET serves
Xin Wang, Pan Liu, Hui Wang, Wenhao Li, Duqiang Zhang, Zhipeng Yu   +5 more
wiley   +1 more source

一种用固定化酶生产果寡糖和高果糖浆的方法

, 2010
本发明提供一种用固定化酶生产果寡糖和高果糖浆的方法，包括“氧化-固定化-还原”三步法固定化菊粉酶，并利用该固定化酶生产果寡糖和高果糖浆，采用这种固定化技术，酶活性收率高，固定化酶稳定性好，用该固定化酶生产果寡糖和高果糖浆，可以回收并重复利用酶，降低生产成本 ...
陈受衍, 赵静玫, 杜昱光, 陈伟, 白雪芳, 曹海龙, 李曙光, 袁中一   +7 more
core  

[Experimental teaching design of instrument analysis for undergraduate study： detection of bifenthrin pesticide residues in tea by response surface methodology-optimized QuEChERS combined with gas chromatography-mass spectrometry]. [PDF]

Se Pu
Gu CX.
europepmc   +1 more source

Structural Modulation of Magnetic Softness in Fe‐Based Amorphous Alloys via Pulse Current Training

Rare Metals, Volume 45, Issue 6, June 2026.
ABSTRACT Fe‐based amorphous alloys, despite their intrinsically low magnetocrystalline anisotropy, suffer from quasi‐dislocation dipoles and localized stress fields that impede domain‐wall motion and increase coercivity. Here, we introduce pulse current training (PCT) as an energy‐efficient technique to overcome these limitations in a Fe76Si9B10P5 ...
Shumin Ye, Zida Zhang, Rie Umetsu, Huaping Ding, Xiong Liang, Yuanfei Cai, Yan Zhang, Yuqiang Yan, Zhenduo Wu, Jiang Ma, Xing Tong, Haibo Ke, Hai‐Yang Bai, Wei‐Hua Wang   +13 more
wiley   +1 more source

[Determination of 40 carbonyl compounds in ambient air by high performance liquid chromatography-triple quadrupole mass spectrometry]. [PDF]

Se Pu
Li GH, Deng S, Li QQ, Zhang CL, Liu YF, Jiang B, Yao Q, Wang H, Wang BG.   +8 more
europepmc   +1 more source