Results 21 to 30 of about 127,413 (298)

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

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

Influence of Organic Structure Directing Agent Isomer Distribution on the Synthesis of SSZ-39 [PDF]

, 2015
The aluminosilicate molecular sieve with the AEI framework topology (SSZ-39) is currently of great interest for use in a number of important applications such as exhaust gas NO_x reduction and the methanol-to-olefins reaction.
Davis, Mark E., Dusselier, Michiel, Haymore, Barry, Hellums, Mark, Moulton, Roger, Schmidt, Joel E.   +5 more
core   +2 more sources

A passive sampling method for radiocarbon analysis of atmospheric CO₂ using molecular sieve [PDF]

, 2010
Radiocarbon (14C) analysis of atmospheric CO2 can provide information on CO2 sources and is potentially valuable for validating inventories of fossil fuel-derived CO2 emissions to the atmosphere.
Garnett, M.H., Hartley, I.P.
core   +1 more source

Sintesis dan Karakterisasi Titanium Silika Heksagonal Molecular Sieve

Jurnal Kimia dan Kemasan, 2015
Molecular sieve titanium silika heksagonal dapat digunakan untuk memurnikan larutan yang bersifat azeotrop dan sulit dilakukan menggunakan metode lain.
Hens Saputra, Ali Nurdin
doaj   +1 more source

Isotope (¹⁴C and ¹³C) analysis of deep peat CO₂ using a passive sampling technique [PDF]

, 2009
We developed and tested a new method to collect CO₂ from the surface to deep layers of a peatland for radiocarbon analysis. The method comprises two components: i) a probe equipped with a hydrophobic filter that allows entry of ...
Garnett, M.H., Hardie, S.M.L.
core   +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

Sorption and activation of hydrocarbons by molecular sieves [PDF]

, 1997
Substantial progress has been made recently in the understanding of sorption and activation of alkanes. This progress reflects the emergence of new theoretical and experimental results, leading to a more quantitative picture of the elementary steps ...
Lercher, Johannes A., Seshan, Kulathuiyer   +1 more
core   +2 more sources

Characteristic Study on Water Absorption and Dehydration of 4A Molecular Sieve

Kuangchan zonghe liyong, 2023
This is a paper in the field of ceramics and composites. In order to understand the water content distribution characteristics of 4A molecular sieve in the process of water absorption and dehydration, the calculation methods of high temperature ...
Hongliang Wang, Zhen Zhang, Yongping Zhang, Hongjie Hu, Hongzhao Liu, Wei Wang   +5 more
doaj   +1 more source

Zeolite crystal layers coupled to piezoelectric sensors [PDF]

, 1991
Microporous zeolite crystals were successfully coupled onto the gold electrodes of quartz crystal microbalances (QCM). A self-assembled monolayer of thiol-alkoxysilane coupling agent on the gold surface was used as the interfacial layer to promote ...
Bein, Thomas, Yan, Yongan
core   +1 more source