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Introduction Valve is an important fluid flow adjusting device in the chemistry industry and food industry.
In this study, the FEM analysis and structure improvement for the pinch valves of process system of polymer with high viscosity and high solid content in the chemistry industry were conducted to improve the fatigue performance and the lifetime of the pinch valves.
For simplicity of the structure of the rubber hose.
Structure Improvement of the Pinch Valve Structure Improvement.
Then, the improved structure of the pinch valve is a valve with rubber hose thickness 10mm, and cone length 100mm.

In this paper, the internal structure and category of fuel cell were firstly described as well as the electricity-generating system.
Different from normal plate electrode, fuel cell used the porous structure.
The structure of SOFC system using coal was complicated, but it was much easier using pipeline gas.
The area of chemistry: find new chemistry batteries (find new spontaneous exothermic redox reactions with obvious trend); improve and combine the existed chemistry batteries to increase the ratio of atom utilization; find catalysts to increase the reactivity and decrease activation energy the reactions need. 3.
Reduce or Eliminate the Dependence on Using Fossil Energy to Generate through the Development of Chemistry Batteries 1.

However MHM such as TiN generates other issues such as i) metal contamination in the patterned structures and ii) growth of metal based residues on the top of the hard mask [3, 4, 5].
The impact of such chemistries on the physical and electrical properties of the integrated p-SiOCH has also been evaluated.
In particular time dependent dielectric breakdown (TDDB) has been performed at 125°C-28V for 70nm space, 7000µm length structure and 300°C-0.2mA for 70nm space, 250µm length structure, respectively in order to determine the impact of the PET on the dual damascene structures reliability and lifetime.
On the other hand, with the CH4 PET the residues formation is no time dependent and less etching chemistry dependent even if large fluorine concentration is still detected on the TiN surface.
H2, O2, NH3 PET can limit residues formation of Ti based residues by acting on fluorine consumption but it strongly dependents of the etching conditions (time and etching chemistry).

The changes in the structure of powder were observed with metallographic microscope LaboMet-1.
Figures 3 and 4 demonstrate the structure of powders.
Structure of powder ECP-1 (×40) a) non-activated, b) 1.5 min. activation, c) 3 min. activation.
Avakumov, А.А.Gusev; Russian Academy of Sciences, Siberian subdivision, Institute of chemistry of solids and mechanical chemistry. – Novosibirsk: Academic publisher «Geo», 2009. – 155 p
Mechanical chemistry and mechanical activation of solids // Success of chemistry. – 2006. – №75. – P. 203-216

China. 2 State Key Laboratory Cultivation Base for the Chemistry and Molecular Engineering of Medicinal Resources; School of Chemistry & Chemical Engineering of Guangxi Normal University, Guilin 541004, P.
China. 3 School of Chemistry and Material, Yulin Normal University, Yulin 537000, P.
Introduction DNA is the basie genetic material of living and the basis of gene expression, and its structure is polymorphic.
Chemical structure of [(p-HOIP)Pt(en)]·2Cl 2.
So it suggested that complex may stabilization of human telomeric G-quadruplex structure in the presence of K+ [8].

Synthesis of thin film by self-assembly of perovskite nanosheets Akira Sugawara 1, Kazuyoshi Uematsu 1, Kenji Toda 2 and Mineo Sato1 1 Department of Chemistry and Chemical Engineering, Niigata University 8050 Ikarashi 2-nocho, Niigata 950-2181, Japan 2Graduate School of Science and Technology, Niigata University 8050 Ikarashi 2-nocho, Niigata 950-2181, Japan Keywords: Soft chemistry, Perovskite, Layered perovskite, Nanosheet, Self-assembly ABSTRACT Layered perovskite, K2NbO3F, includes rock-salt type KF blocks in a K2NiF4 type structure.
The reaction mechanism of this new colloidal chemistry technique is explained as follows.

Hematite has the corundum structure and it belongs to the D3d point group.
(a) Molecular structure of methyl orange (MO).
Duguet, Progress in Solid State Chemistry, 2006, 34, 237-247
Leite, Physical Chemistry Chemical Physics, 2009, 11, 1215-1219
Kang, New Journal of Chemistry, 2013, 37, 4004-4009

Industrial & Engineering Chemistry Research. 61 (2022) 3952-3961
Frontiers in Chemistry. 11 (2024) 1326454
European journal of inorganic chemistry. 27 (2019) 3126-3141
Chemistry of Materials. 36 (2024) 1172-1187
New Journal of Chemistry. 46 (2022) 20985-20994

The effects of chain length on the transportation behavior were discussed in terms of the electronic structures and transmission spectra.
Porphyrin as a large molecular conjugated system has good electron transport properties, but in the past decade or so, mainly for the porphyrin geometry and electronic structure studies, and for oligomeric porphyrin molecule electron transport properties of low coverage[2-3].
And Crossley synthesized the four conjugated porphyrin chain structure[6].
In addition, the full structure optimization of the model molecules was performed by relaxing all atoms within a force tolerance of 0.1 eV/ Å.
Coordination Chemistry Reviews, 2002,230, 5-27 [9]Yin X, Liu HM and Zhao JW, Electronic transportation through asymmetrically substituted oligo(phenylene ethynylene)s: Studied by first principles nonequilibrium Green's function formalism, Journal of Chemical Physics,2006,125:094711-1-6

Preparation and Characterization on Self-catalytic of SnO2 Nanowire Junctions Xiaoyong Xu1,2,a, Zhonghe Wen1,b, Xianzhong Wang1 and Yun Xiang1 1Department of Chemistry and Engineering, Pingxiang College , Pingxiang 337055, China 2College of Materials Science and Engineering, Hunan University, Changsha 410082, China adreamxxy@sina.com, bwzh6682@163.com Keywords: Characterization, Crystal Structure, Nanomaterials, Self-catalysts.
Introduction In recent years, the semiconductor nanomaterial's research has aroused enormous attention and interest in scientists of many discipline domains, such as the material, physics, chemistry[1-3].
Structure of rutile SnO2 has space group P42/mnm and its cell parameters are a = 0.473nm, c = 0.318nm.
But in the structure of orthorhombic SnO2, its cell parameters are a = 0.473nm, c = 0.318nm, which can only formed in the phenomenon of 158KPa 800 ℃ and rapidly cooling makes the high temperature phase keep stable in room temperature.
Klabunde: Nanomaterials Chemistry (Chemical industry press, Beijing 2004) [3] Huanbin Liu, Xiaoquan Chen: Nanometer science and technical Introduction (Chemical industry press, Beijing 2005.