Fluid catalytic cracking (FCC) is a major process in oil refineries to produce gasoline and base chemicals from crude oil fractions. The spatial distribution and acidity of zeolite aggregates embedded within the 50-150 μm-sized FCC spheres heavily influence their catalytic performance. Single-molecule fluorescence-based imaging methods, namely nanometer accuracy by stochastic chemical reactions...

Nghiên cứu này trình bày một quy đơn giản, tiết kiệm thời gian và năng lượng để tổng hợp vật liệu composite NaX/Fe3O4, với tỷ lệ khối zeolite NaX:Fe3O4 = 1,5:1 (g/g), khuấy trộn 2 giờ, nhiệt độ phòng, nồng chất liên kết tetraethyl orthosilicate (TEOs) 1%. Các phương pháp phân tích XRD, TEM, FTIR cho thấy NaX/Fe3O4 có dạng hình cầu, kích thước khá đồng đều đầy đủ các dao động đặc trưng của compo...

Over the years, many strategies have been developed to address the problem of sintering of nanoparticle catalysts, including encapsulating metal nanoparticles in protective shells, and trapping nanoparticles in the cavities of certain zeolites in post-synthesis steps. In general, materials that contain metal nanoparticles that are only accessible via zeolite micropores are intriguing, specifica...

Mammals feel thirsty or develop an appetite for salt when the correct balance between water and sodium in the body fluid has been disrupted, but little is known about the mechanism in the brain that controls salt homeostasis. It has been postulated that the existence of both an osmoreceptor and a specific sodium receptor is required to accommodate the experimental data (Johnson and Edwards, 199...

Different from a bulk phase, a gas nanophase can have a significant effect on liquid motion. Herein we report a series of experimental results on molecular behaviors of water in a zeolite β of molecular-sized nanopores. If sufficient time is provided, the confined water molecules can be "locked" inside a nanopore; otherwise, gas nanophase provides a driving force for water "outflow". This is du...

Supporting Information S4 Fig. Immunohistochemical staining of rat and mouse brains with anti-Nax antibodies. Immunohistochemical staining of the coronal sections of rat and mouse brains, containing the median preoptic nucleus (MnPO) (A) and median eminence (B) with anti-rat Nax [12] and anti-mNax antibodies. Immunohistochemical staining was performed as described in S5 File. Neither rat nor mo...

The purpose of this work is to study the process neutralization vapors a mixed solvent brand 650 by adsorption‑catalytic method. essence method consists in concentration components on sorbent, thermal desorption followed periodic flameless catalytic oxidation accumulated organic substances carbon dioxide and water. Synthetic zeolite NaX was used as porous material based foam ceramics Al 2 O 3 /...

This paper revisits the problem of the string decay contribution to the axion cosmological energy density. We show that this contribution is proportional to the average relative increase when axion strings decay of a certain quantity Nax which we define. We carry out numerical simulations of the evolution and decay of circular and non-circular string loops, of bent strings with ends held fixed,...