Results 91 to 100 of about 5,834,879 (181)

一种化学刻蚀机

open access: yes, 2005
一种小型化学刻蚀机是由振荡器、刻蚀槽、固定支架、加热器和温度控制器组成。刻蚀机的振荡器速度可调,刻蚀槽温度可从室温至90℃之间可调,特别适合于不锈钢薄板的化学刻蚀。同时也可以用于硅片、瓷片、铝片、玻璃、有机玻璃、及合金材料的化学刻蚀。本刻蚀机具有体积小,重量轻,能耗小,结构简单,价格低廉,操作方便,控温精度高的特点。是一种小巧,经济实用的湿法化学刻蚀机 ...
陈光文, 李恒强
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Amino‐Functionalized Mesoporous SiO2 Hollow Nano‐Doughnuts for Enhanced Gas Adsorption and Specific Foodborne Pathogen Recognition in Point‐of‐Care Detection

open access: yesRare Metals, Volume 45, Issue 10, October 2026.
ABSTRACT Developing rapid, precise gas sensors for Listeria monocytogenes (LM) biomarker detection faces challenges due to suboptimal gas‐solid interactions. Herein, we report the rational synthesis of amino‐functionalized mesoporous SiO2 hollow nano‐doughnuts (MS‐2‐NH2‐2) via modification with (3‐aminopropyl) trimethoxysilane (AAPTMS), which enables ...
Xingyu Wang   +7 more
wiley   +1 more source

一种直接催化氧化脂肪伯醇成酯的方法

open access: yes, 2009
本发明涉及催化氧化脂肪伯醇的方法,具体地说是一种高选择性直接催化氧化脂肪伯醇成酯的新方法,以氧气或空气为氧化剂,以2,4,4,6-四溴 -2,5-环己二烯酮、N-溴代化合物、溴素分子中的一种或一种以上为主催化剂,以氮氧化合物为助催化剂,一步氧化脂肪伯醇成酯;主催化剂和助催化剂的摩尔比为1∶1~100∶1;催化剂的使用量为脂肪伯醇用量的0.1~50.0 %mol;反应温度为-10~150℃;反应压力为0.1~10.0MPa。该方法的特点是反应步骤少、反应条件温和、选择性高 ...
高 进   +6 more
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Ultrasonic Vibration Assisted Laser Processing: A Hybrid Paradigm for Extreme Surface Enhancement

open access: yesRare Metals, Volume 45, Issue 10, October 2026.
ABSTRACT Traditional laser processing techniques offer many advantages, but they often encounter limitations such as heat‐affected zones, recast layers, residual tensile stresses, and poor surface finish. The integration of ultrasonic vibration (UV) presents a promising hybrid approach to overcome these challenges by introducing beneficial effects like
Aziz Ul Hassan Mohsan   +6 more
wiley   +1 more source

一种积雪草甙化学对照品的分离制备方法

open access: yes, 2008
本发明涉及一种积雪草甙化学对照品的制备方法。以重量含量30~97 %的积雪草甙提取物为原料,以制备型高效液相色谱为分离手段,以一定比例的甲醇-水溶液为洗脱体系,获得纯度大于98%的积雪草甙化学对照品。工艺步骤有:样品预处理,色谱柱处理,进样,洗脱,在线检测,收集含有积雪草甙的洗脱液,减压浓缩积雪草甙洗脱液至干,即得积雪草甙化学对照品。经高效液相色谱法检测,积雪草甙的含量可达到98%以上 ...
肖红斌, 高明哲
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Recent Advances in the Preparation, Structural Modulation, and Applications of Metal–Organic Framework (MOF) Membrane Materials in the Field of Separation

open access: yesRare Metals, Volume 45, Issue 10, October 2026.
ABSTRACT Metal–organic framework (MOF) membranes are a novel class of composite membranes. They use crystalline porous MOF materials as separation layers or functional fillers. Because of their well‐ordered and tunable pore structures and highly controllable chemical environments, MOF membranes show broad application prospects in gas separation ...
Yanqing Qu   +7 more
wiley   +1 more source

纳米Cu2O光催化杀菌的原位热动力学研究

open access: yes, 2016
光催化杀菌是一种高效、无毒、经济的杀菌方法,已成为当今的前沿研究热点。纳米Cu2O是一种窄带隙半导体,在可见光下产生的光生电子和空穴能直接和细胞组成分进行反应,或是光生电子或光生空穴与水或水中的溶氧反应,形成具有很强氧化能力的活性氧类高活性物质,穿透菌类的细胞壁进入胞体,阻止成膜物质的传输,阻断破坏其呼吸和电子传输系统,从而达到彻底杀菌的目的。本文采用本实验室在国内率先设计研发的光-热联用系统,国家自然科学基金(20963001,21273050,21573048); 广西高校科技研究项目 ...
韦慧, 廖艳娟, 汤焕丰, 黄在银
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From Tetracycline to Sulfamethoxazole: Photocatalytic Degradation and Mechanistic Insights in Aquatic Environments

open access: yesRare Metals, Volume 45, Issue 10, October 2026.
ABSTRACT The pollution caused by antibiotics to aquatic ecosystems is becoming increasingly serious, thus more effective treatment methods are urgently required. Although the photocatalytic degradation behavior of tetracycline (TC) is relatively well understood, sulfamethoxazole (SMZ), an emerging pollutant originating from large‐scale livestock ...
Yihang Yang   +6 more
wiley   +1 more source

广西民族大学2018年硕士研究生入学考试初试自命题科目试题:刑法与刑事诉讼法

open access: yes, 2018
广西民族大学2018年硕士研究生入学考试初试自命题科目试题:刑法与刑事诉讼法;试卷代号 ...
广西民族大学法学院
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法学家眼中的和谐社会 [PDF]

open access: yes, 2005
从现有权威性文献看,“和谐社会”是执政党要追求的一种社会状态,更是一种涉及面极其广泛的治国方略。在这个过程中,法律、法学和法学家的作用举足重轻。面对如此重大议题,法学家应当表达观点、提出诉求、发挥专业功能。基于这种考虑,本刊特邀部分中青年法学家进行了笔谈,希望他们的文章能引起讨论,促进法律界、法学界形成一些基本共识。中文核心期刊要目总览(PKU)中国社会科学引文索引(CSSCI)0053 ...
王立民   +10 more
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