Results 21 to 30 of about 4,628,843 (306)

An Efficient Synthesis of Ginsenoside Rg5 via Conversion of PPD Type Saponins: Unusual Application of 4A Molecular Sieves

Natural Product Communications, 2021
Ginsenoside Rg5 is a rare secondary ginsenoside with good pharmacological activity. However, preparation of Rg5 is time consuming, gives a low yield and has poor selectivity and efficiency.
Cheng Le-qin, Ye An-qi, Zhang Hao-ran, Zhang Yue-wei, Li Ling   +4 more
doaj   +1 more source

Size-selective molecular recognition based on a confined DNA molecular sieve using cavity-tunable framework nucleic acids

Nature Communications, 2020
Size selectivity is an important mechanism for molecular recognition based on the size difference between targets and non-targets. However, rational design of an artificial size-selective molecular recognition system for biological targets in living ...
Xiaoyi Fu, Guoliang Ke, Fangqi Peng, Xue Hu, Jiaqi Li, Yuyan Shi, Gezhi Kong, Xiaobing Zhang, W. Tan   +8 more
semanticscholar   +1 more source

The Adsorption of VOCs by Honeycomb Ceramics Loaded with Molecular Sieves

Journal of Chemistry, 2022
In order to improve the adsorption performance of molecular sieve honeycomb ceramics for VOCs, the author proposes a research method for the adsorption performance of VOCs based on the honeycomb ceramics loaded with molecular sieves.
Ping Zhang
doaj   +1 more source

Technical aspects of circulating tumor cells (CTC) isolation using molecular sieve [PDF]

Biuletyn Wojskowej Akademii Technicznej, 2017
The article presents the characteristics of circulating tumor cells (CTC) in the context of their enrichment. It presents the possibility of the use of molecular sieves in CTC isolation.
Paweł Pastuszka, Zdzisław Bogdanowicz, Artur Kowalik, Krzysztof Gruszczyński, Mariusz Łapiński   +4 more
doaj   +1 more source

Sieve Plate Pores in the Phloem and the Unknowns of Their Formation

Plants, 2019
Sieve pores of the sieve plates connect neighboring sieve elements to form the conducting sieve tubes of the phloem. Sieve pores are critical for phloem function.
Lothar Kalmbach, Ykä Helariutta
doaj   +1 more source

Adsorption properties of environmentally friendly insulating medium C4F7N and its common decomposition products in NaA, NaZSM‐5, and NaX molecular sieves

High Voltage, 2023
Selecting suitable materials to adsorb the C4F7N mixtures decomposition products could not only keep the stable operation of the environmentally friendly insulating gas switch cabinet, but also ensure the safety of operation and maintenance personnel. It
Shuangshuang Tian, Zian Yuan, Xiaoxing Zhang, Yingxiang Wang, Weifeng Luo, Yang Liu   +5 more
doaj   +1 more source

Envisioned role of slit bypass pores in physical aging of carbon molecular sieve membranes

, 2020
Carbon molecular sieve (CMS) hollow fibers are a special class of rigid, molecular sieving membranes with unique scalability and excellent separation properties for challenging gas-pairs.
Samuel S. Hays, Oishi Sanyal, Nicholas E. León, Pezhman Arab, W. Koros   +4 more
semanticscholar   +1 more source

The catalytic performance of acid-modified Hβ molecular sieves for environmentally friendly acylation of 2-methylnaphthalene

Green Processing and Synthesis, 2022
2,6-Methylacylnaphthalene is an important organic chemical raw material, mainly used as a precursor for synthesizing polyethylene 2,6-naphthalene dicarboxylate (PEN).
Sun Jingjing, Zhang Nan, Jin Haibo, Mao Xuefeng, He Guangxiang, Li Junfang, Yan Zihao, Hu Fating, Ma Lei, Guo Xiaoyan, Yang Suohe   +10 more
doaj   +1 more source

Creation of well-defined "mid-sized" micropores in carbon molecular sieve membranes.

Angewandte Chemie, 2019
Carbon molecular sieve (CMS) membranes are candidates for the separation of organic molecules due to their stability, ability to be scaled at practical form factors, and the avoidance of expensive supports or complex multi-step fabrication processes.
Yao Ma, Melinda L. Jue, Fengyi Zhang, Ronita Mathias, H. Jang, Ryan P. Lively   +5 more
semanticscholar   +1 more source

Preparation of NaA zeolite molecular sieve based on solid waste fly ash by high-speed dispersion homogenization-assisted alkali fusion-hydrothermal method and its performance of ammonia-nitrogen adsorption

Journal of Science: Advanced Materials and Devices
A high-speed dispersion homogenization-assisted alkali fusion-hydrothermal method was successfully developed for the preparation of NaA zeolite molecular sieve with excellent adsorption performance for ammonia nitrogen using solid waste fly ash.
Guoqing Liu, Yuxing Lin, Lili Zhang, Maowei Zhang, Cuncun Gu, Jing Li, Tucai Zheng, Jun Chai   +7 more
doaj   +1 more source