Stability

Bài giảng Xúc tác - Chương 1: Giới thiệu chung về hiện tượng xúc tác. Chương này cung cấp cho học viên những nội dung gồm: giới thiệu về xúc tác; cơ chế của phản ứng xúc tác; hấp phụ hóa học trên xúc tác rắn; hoạt tính của chất xúc tác (catalyst activity); độ chọn lọc của chất xúc tác (catalyst selectivity); tuổi thọ của chất xúc tác (catalyst stability);... Mời các bạn cùng tham khảo!

13p mothuahoa 04-05-2024 4 2   Download

Mesoporous silica nanoparticles (MSNs) have been used as an anticancer drug delivery system with high safety and entrapment capacity thanks to their large internal space for drug accommodation, durable structure, and good biocompatibility. However, the treatment efficiency of the bare MSNs is limited due to its drug leakage and burst release. In this study, a phospholipid bilayer was covered on the MSNs surface (MSN@Lip) as a liposomal cap that not only reduced drug leakage but also improved the stability of the colloidal system.

8p dianmotminh02 03-05-2024 3 1   Download

This modeling is performed on an experimental data set of complexes, where the metal ions of these complexes include transition ion metals and lanthanide ion metals. We use these models to develop a series of new thiosemicarbazone and their complexes; simultaneously, the complexes are worked out the stability constants from the novel models.

9p dianmotminh02 03-05-2024 6 2   Download

In the present study, we have made an attempt to prepare complexed PVA-PVP-KNO3-BaTiO3 blend composite polymer electrolyte membranes composed of potassium nitrate (KNO3) as salt and BaTiO3 of various concentrations as filler and studied their properties. The advantages of addition the fillers are the increase in ionic conductivity at room temperatures and the improvement of the stability at the interface with electrodes.

12p dianmotminh02 03-05-2024 9 2   Download

The paper results showed that the more than ten years mangrove community is a stable forest biome. Mangroves from 10 years old should be planned with different species to increase the diversity in species structure and enhance the ability to stabilize the community and withstand changes in coastal habitats.

12p dianmotminh02 03-05-2024 3 1   Download

The geometries and relative stabilities of 15 tautomeric forms and the corresponding isomers of the studied molecules have been identified and their relative stabilities are investigated. The potential energy profiles and intrinsic reaction coordinates (IRC) calculations along the proton transfer coordinates both in the ground and in the excited state are monitored as well. The impact of the donating (OMe) and withdrawing (NO2) groups on the single and double proton transfers are investigated both in the gas phase and solution.

9p dianmotminh02 03-05-2024 6 1   Download

The present study focuses on the preparation of silver/copper bimetallic hybrid nanoparticles by green method from precursor solutions of silver nitrate & copper nitrate and the locally available citrus fruit (lemon) peel extract which behaves as the stabilizing and reducing agent. Initially, the formation of hybrid nanoparticles was noticed in the reaction mixture by colour change.

7p dianmotminh02 03-05-2024 4 1   Download

In this work, gold nanorods (AuNRs) with well-controlled aspect ratios were prepared using a modified seedgrowth method and covered by TiO2 layers through the hydrothermal reaction to improve stability. Integrating TiO2 with plasmonic rod-like gold nanoparticles could enhance their photo activity by the local surface plasmon resonance (LSPR) effect. AuNRs aspect ratios were controlled by varying the amount of seed solution, reducing agents, surfactant (CTAB), and titanium (IV) but oxide.

7p dianmotminh02 03-05-2024 4 2   Download

A major challenge for outdoor uses of methylammonium lead halide (MAPbX3) solar cells is the poor durability of the perovskite film under humidity. This instability is due to limitations of the dipping or spin coating process in producing MAPbX3 films through a direct reaction between PbI2 and methylammonium iodide (MAI) in an organic solvent. In this study, we devised an eco-friendly and cost-effective method to fabricate MAPbX3 films using an aqueous solution of Pb(NO3)2 and MAI vapour. I

7p dianmotminh02 03-05-2024 8 2   Download

In this study, we propose a novel approach for the synthesis of AISe core and highly luminescent AISe/ZnS core/shell NCs in a 2-step procedure. First, the AISe core NCs were produced using both glutathione and citric acid as dual stabilizers at 96 °C for 20 min at different pH values of the reaction solution.

11p dianmotminh02 03-05-2024 5 2   Download

The research found that most foreign workers are of unskilled labor with less pay and longer working hours, and this justifies their recruitment, which means that local workers with skilled skills are more affected by the increasing numbers of foreign workers. Therefore, it is necessary to protect national workers against foreign labor competition. In the labor market through the establishment of strict laws protect the local factor and restrict the work of foreign workers and contribute to the stability of wage rates

10p longtimenosee10 26-04-2024 5 1   Download

Nội san Nghiên cứu khoa học sinh viên – Tập 5/2023 gồm có một số bài viết liên quan tới các vấn đề về tài chính vĩ mô, tài chính doanh nghiệp như: Vai trò của chi ngân sách nhà nước với mục tiêu giảm nghèo, Quản lý hải quan đối với hoạt động thương mại điện tử xuyên biên giới tại Việt Nam, The solution to stabilizing gasoline prices in the Vietnamese market, Bàn thêm về phát triển ngân hàng số, Thực trạng và một số giải pháp nhằm phát triển nguồn nhân lực chất lượng cao cho các doanh nghiệp ở Việt Nam,... Mời các bạn cùng đón đọc để biết thêm những nội dung chi tiết.

80p longtimenosee09 08-04-2024 11 2   Download

The thesis "Stability of some classes of degenerate two-phase difference systems with delay" is to study the stability of degenerate two-phase systems with mixed delay in the direction of variation; Stability and dissipation in finite domain of degenerate 2-D system with variable delay; Evaluation of the gain set and control design for a degenerate 2-D system in the Roesser model with variable delay;... Please refer to it!

120p gaupanda019 21-03-2024 4 1   Download

Bài viết sử dụng phần mềm mô phỏng Matlab Simulink làm công cụ dùng để kiểm tra, so sánh tính hiệu quả của một hệ thống an toàn chủ động trên xe ô tô có trang bị hệ thống VSC (Vehicle Stability Control). Các kết quả nghiên cứu giúp cho mọi người hiểu rõ hơn về hệ thống VSC, đưa ra các lời khuyên cho người sử dụng ô tô, đồng thời cũng là cơ sở để nghiên cứu sâu hơn về động lực học quay vòng của xe ô tô.

8p kimphuong1123 18-08-2023 9 3   Download

The geometric structure, stability, dissociation channel and magnetism of AgnCo clusters (n = 1–12) have been studied using density functional theory. The results show that the Co atom tends to choose the highest coordination position.

7p videadpool 05-05-2023 5 3   Download

To achieve the aim, the first objective is preliminary experiments on preparation of polypropylene blends with silicone elastomer masterbatch and characterize by analysis of mass composition, mechanical properties, and dynamic mechanical properties to investigate any improvement of properties. The silicone elastomer masterbatch will then be substituted with propylene-maleic anhydride graft copolymer waxes or other compatibilizers.

147p runthenight05 01-03-2023 5 3   Download

The main aims of this research are: To determine the phase inversion temperatures for the formation of oil-in-brine nanoemulsions at various salt concentrations using conductivity measurements; To prepare the nano-emulsions at PIT points, and study their stability by measuring their droplet size, polydispersity and size distribution using dynamic light scattering technique; To confirm the DLS results using Cryo-SEM technique;...

324p runthenight07 01-03-2023 5 3   Download

This study focuses on the stability of nano-emulsions produced by phase inversion temperature method using n-Decane and n-Dodecane as the dispersed phase and pure water/brine as the aqueous phase (continuous phase). A non-ionic surfactant (Brij 30) was used in the preparation of the nano-emulsions. Three different types salt namely \(NaCl\), \(KCl\) and \(MgC{l_2}\) were used at different concentrations.

173p runthenight07 01-03-2023 3 3   Download

The objectives of this research work are: Study the clay intercalation by organic dye and develop a process to produce nanoclay-dye pigment with better stability and good performance; Conduct structural characterization to verify the level of intercalation and stability of clay-dye pigment by using X-Ray diffraction (XRD) and Transmission Electron Microscopy (TEM); Investigate the thermal stability of clay dye pigment using Thermo Gravimetric Analysis (TGA) to reveal the effect of dye intercalation into the clay on improving thermal stability of organic dye; Compound the clay- pigment with ...

141p runthenight07 01-03-2023 3 3   Download

The main objective of this research "Dynamic modelling of an aggregated solar-PV system for power system transient stability studies" is to develop an aggregated solar-PV model and critically analyse its performance under various operating conditions and faults.

104p runthenight04 02-02-2023 5 2   Download