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Analysis of Antioxidant Properties and Major Components of the Extract of Paulownia tomentosa Steud Flowers Zhifen Meng1, a, Xuefeng Guo 2,b, Yong Zhu1 and Shuke Jing1 1 Department of Chemistry and Chemical Engineering, Henan Institute of Science and Technology, Henan Xinxiang 453003, PR China 2 State Forestry Administration Key Open Laboratory, International Centre for Bamboo and Rattan, Beijing 100102, PR China a mengzf@yeah.net, b Corresponding author: gxf71622@ icbr.ac.cn Keywords: UPLC-TOF-MS/MS, Paulownia tomentosa Steud flower, DPPH, superoxide anion, hydroxyl, IC50 value Abstract: Paulownia tomentosa Steud flowers have been used for many therapeutic purposes in traditional pharmacopeia.
Materials and methods General procedures Column chromatography was performed on an AB-8 macroporous resin adsorption glass column.
Plant material Fresh flowers of Paulownia tomentosa Steud were collected from northern area in Henan Province.

Implications of the Global Race to Net-Zero by 2050 for the Strategic Fleet of Coal-Fired Power Plants in SADC MASHINGAIDZE Melvin Mununuri* University of Namibia, School of Engineering & the Built Environment, Department of Mechanical & Metallurgical Engineering, Ongwediva 15006, Namibia mmashingaidze@unam.na Keywords: coal power and energy access; greenhouse gas emissions; United Nations Sustainable Development Goals and energy policy; just energy transition; energy security and climate finance.
Thus, decarbonisation of this sector is the key to the attainment of net-zero [2,3,6,18–21].
The outcome of the 26th UN Climate Change Conference of the Parties (COP26) – the Glasgow Climate Pact, cites the phase-down of coal power and transitioning to clean energy as key components of the global decarbonisation strategy [1,15,60,61].
Energy Agency 224 [3] Gür T M 2021 Carbon Dioxide Emissions, Capture, Storage and Utilization: Review of Materials, Processes and Technologies Prog.
[105] Banktrack 2021 Medupi coal power plant - South Africa [106] Irlam P 2006 Upgrading of a boiler feed pump in a UK coal fired power station Institution of Mechanical Engineers, Fluid Machinery Group - Ninth European Fluid Machinery Congress: Applying the Latest Technology to New and Existing Process Equipment vol 2006 [107] Liao S, Li Z, Li G, Wang J and Wu X 2015 Modeling and optimization of the medium-term units commitment of thermal power Energies 8 [108] Agora Energiewende 2017 Flexibility in thermal power plants with a focus on existing coal-fired power plants [109] Liu W H, Ho W S, Lee M Y, Hashim H, Lim J S, Hoo P Y and Klemeš J J 2018 Optimising thermal power plant with generation flexibility and heat rate factor Chem.

These advantages associated with their handling requirements, simplicity and versatility of process engineering, catalyst regeneration, decreasing reactor and plant corrosion problems, and environmentally safe disposal [1-12].
Synthesis of pyrrole derivatives Pyrroles and their derivatives are very important heterocyclic compounds, which constitutes the core unit of many natural products, synthetic materials and useful in medicinal chemistry.
Lercher, Labile sulfates as key components in active sulfated zirconia for n-butane isomerization at low temperatures, J.
Ramesh, Selectivity engineering in the O-versus C-alkylation of p-cresol with cyclohexene over sulfated zirconia, Can.
Xiao, Sulfated zirconia supported in mesoporous materials, Appl.

Mehrer, Diffusion in Solids: Fundamentals, Methods, Materials, Diffusion-Controlled Processes, Springer Series in Solid-State Sciences, vol. 155, 2007. ].
The physical situation is analogous to frequency-shift keying (FSK) in communications, with shifts occurring with each jump of the tracer atoms [12].
Okamoto, eds., Phase Diagrams of Indium Alloys and Their Engineering Applications, ASM International, Materials Park, OH, 1992. ] and the solubility limit of In in solid-Ga has been found using PAC to be at a mole-fraction of 10-11 [[] Xiangyu Yin, Indium solubility in a-gallium and gallium-indium eutectic alloys studied using PAC, MS thesis, Washington State University, 2011 (unpublished). ].
Okamoto, eds., Phase Diagrams of Indium Alloys and Their Engineering Applications, ASM, Materials Park, OH, 1992. ].
Collins, Nonstoichiometry in line compounds, Journal of Materials Science 42 (2007) 1915-1919. ].

X-ray photoelectron spectrometry (XPS) is a non-destructive characterization technique and is a very useful tool that allows to identify the elements that exist within a material (elemental composition) or are covering its surface, as well as its chemical state, the general electronic structure and density of electronic states in the material.
Additionally, the inset in Fig. 4a shows the simulated electron diffraction by Fourier transform of the TEM micrograph, where a reciprocal space of a monocrystalline material can be seen.
Since CdS is a direct bandgap material, n=2.
These kind of modifications enables band gap engineering, which is a key element of the design and fabrication of efficient optoelectronic devices [58,59] Fig. 6.
Mahdi, Optical and structural properties of cadmium sulphide quantum dots based thin films as potential sensing material for dengue virus E-protein, Results in Physics 11 (2018) 734-739

As many of the engineering properties of steel or malleable iron can be duplicated with ductile iron casting, the world production of ductile iron castings has continued to increase since it discovered (Fig. 1b, c) [1, 4].
The following three charge variants can have an effect on whether REE are required and the quantity needed: (1) High quality/cost charge materials, i.e. high purity pig iron (HPPI), premium steel scrap and controlled ductile iron scrap, will lead to very low levels of trace elements in the base iron [K < 0.8].
(2) Medium quality/cost charge materials, i.e. inexpensive pig iron, controlled ductile iron returns iron and steel scrap, having relatively reduced levels of trace elements [K values between 0.8 to 1.2].
(3) Using low quality/cost charge materials, i.e. inexpensive pig iron and inexpensive ferrous scrap, which result in a high level of detrimental trace elements in the base iron [K > 1.20].
REEs are a key factor in developing modern military technology, including critical military-based technologies such as precision-guided weapons and night-vision goggles.

In addition to the low-molecular materials, the polymer materials have also been widely examined.
Such strong injection into low mobility materials inevitably leads to charge accumulation in organic materials.
(viii) Cathode materials: Commonly used materials for cathode are: Mg:Ag, Mg:In and Li:Al alloys.
Chen, Recent progress of molecular organic electroluminescent materials and devices, Materials Science and Engineering R39 (2002) 143 - 222
Malachowski , Organic light emitting diode: Operation and application in displays, Archives of Materials Science and Engineering 40 (2009) 5 -12

Materials and Methods The distribution network is composed of medium voltage feeders, distribution substations, protection devices and other devices that may be connected to the networks.
Eguchi, Modeling and simulation of DVR and D-STATCOM in presence of wind energy system, Computers, Materials & Continua, 74 (2023) 4547–4570
Harmonic Mitigation and Neutral Line Currents Reduction of Distribution Systems Using Adaptive Neuro-Fuzzy Inference System Based D-STATCOM, Journal of Engineering and Applied Sciences. 13 (2018) 5517-5522
Bassi, Reducing Fault Current by Using FACTS Devices to Improve Electrical Power Flow, Mathematical Problems in Engineering. 2021 (2021) 9 pages
Parmar, Improve Voltage Profile of Power System Network using D-STATCOM and DVR with Matlab Simulation, International Journal of Engineering Research & Technology. 01 (2014)

Materials and Methods Synthesis of a n+pp+ Si junction.
Materials Letters 363 (2024) 136255
Materials Letters 359 (2024) 135895
Materials Letters 366 (2024) 136571
Materials 16 (2023) 16 5723

In the early 1990s, at Eket in Niger Delta of Nigeria, ten engineers including many oil rig workers lost their lives following oil-well blow out.
The analysis of the collected cases showed that the removal of the human errors is the key to preventing these near miss cases that have the potential to lead to actual accidents [33].
The aim of this study is to underscore the need for the application of concurrent engineering during the design stage of oil facilities projects and also to point up the need to imbibe apposite HAZOPS and HAZIDS philosophies, in work locations as a means arresting trend in work related accidents in the Nigerian oil industry.
The Markovian model employed provided decision support tool for assessing the effectiveness of HAZOPS and HAZID schemes adopted based on the case material obtained.
Journal of Chemical Engineering Communications, vol.193, No.8, (2006), pp.10241037(14).