Derivatives

In this study, a composite material between MnFe2O4 and activated carbon from coffee husks (MFO/AC) was synthesized using co-precipitate and hydrothermal methods to remove ammonium from aqueous solutions. The characteristics of MFO/AC were characterized and evaluated by scanning electron microscopy (SEM) and Fourier transform infrared spectra (FTIR).

9p vijiraiya 19-05-2025 2 1   Download

Legal English is characterized by complex vocabulary, including derivational, semantic, and syntactic challenges, as well as the cultural and historical nuances embedded in legal terminology. This study investigated the challenges faced by legal English major students learning legal English, particularly focusing on legal lexicology.

9p vijiraiya 19-05-2025 2 1   Download

Bài nghiên cứu này tập trung vào việc điều khiển Ballbot, một loại robot có khả năng di chuyển cân bằng trên mặt phẳng nghiêng. Mục tiêu là phát triển và áp dụng các phương pháp điều khiển để duy trì sự ổn định và kiểm soát chuyển động của Ballbot khi di chuyển trên các bề mặt nghiêng. Các kỹ thuật điều khiển như PID (Proportional-Integral-Derivative) hoặc điều khiển trạng thái có thể được sử dụng để đảm bảo robot có thể di chuyển một cách mượt mà và không bị mất thăng bằng. Nghiên cứu có thể mang lại ứng dụng trong các lĩnh vực như robot di động, tự động hóa và các công nghệ tương lai.

3p vimaito 11-04-2025 1 1   Download

The present research develops soybean curd biochar loading goethite (SBCG) and soybean curd activated carbon loading goethite (SACG), a magnetic material made from soybean curd residue and Fe precursor (α-FeOOH), for advanced oxidation processes (AOPs) of TCH in aqueous solutions.

9p viling 11-10-2024 3 1   Download

A novel series of s-triazine derivatives was designed and screened for in silico an cancer activity in histone deacetylase 6 (HDAC6) target by molecular docking method using AutoDock Vina.

10p vifilm 11-10-2024 3 1   Download

The study's purpose is to in silico molecular docking of some new s-triazine derivatives for anticancer activity on the VEGFR2 receptor. Fifty s-triazine derivatives were screened for anticancer activity through inhibition of VEGFR2 (vascular endothelial growth factor receptor-2) by molecular docking method using AutoDock Vina software.

10p vifilm 11-10-2024 1 1   Download

The rest of this paper is arranged as follows. Section II shows some theoretical bases as PID controller, fuzzy PID controller, DC motor, microcontroller STM32F103C8T6… System design steps are provided in section III. The results of the proposed system are presented and discussed in section IV. Finally, section 5 closed the paper with some relevant conclutions.

7p viengfa 28-10-2024 3 2   Download

To evaluate the changes of clinical and paraclinical characteristics in chronic obstructive pulmonary disease patients after treatment of umbilical cord-derived mesenchymal stem cells. Subjects and method: 21 stable COPD patients were enrolled with C and D groups in accordance with GOLD 2018.

7p viengfa 28-10-2024 4 2   Download

This study used the Google Earth Engine (GEE) platform to calculate the water capacity of the Saigon-Dongnai basin using remote sensing-derived products related to evapotranspiration (ET) and precipitation (P). The GEE was used to retrieve two important inputs: MODIS evapotranspiration spanning the drainage basin and CHIRPS satellite precipitation.

7p vimitsuki 30-03-2025 2 1   Download

In this work we studied the robust stability for implicit integro-dynamic equations on time scales with nabla derivative, which is considered as a generation of differential algebraic equations and implicit difference equations. We showed the reservation of exponential stability of these equations under small Lipschitz perturbations.

11p vimitsuki 30-03-2025 3 1   Download

Stictic acid, a depsidone in many lichen species, is a potentially bioactive compound. Derivatives of stictic acid were synthesised by halogenation or esterification. However, the effects of these conditions on the decomposition of stictic acid have yet to be studied. Hence, the modification of stictic acid was investigated using an AlCl3 catalyst and dimethylformamide solvent.

8p viaburame 14-03-2025 2 1   Download

A fragment-based approach has been applied to derive 2-(7-hydroxy-2-oxo-2H-chromen-4- yl)acetic acid 1 into 4 new coumarin derivatives 2a-d through amide bonds. The compounds were screened for their anticancer activity using MTT assay on MCF-7 and HepG2 cell lines.

10p viaburame 14-03-2025 4 0   Download

Ocimum africanum L. is a distinctive Vietnamese herb, especially common in Tuy Hòa, Phú Yên. This study focuses on extracting and analyzing the chemical composition of the essential oil derived from the leaves of Ocimum africanum. The essential oil was extracted using the steam distillation method and its chemical composition was analyzed using gas chromatography-mass spectrometry (GC-MS).

7p viaburame 14-03-2025 3 1   Download

The article presents a model and derives analytical expressions for Helmholtz free energy, the nearest neighbor distance, isothermal compressibility, the thermal expansion coefficient, the heat capacities at constant volume and constant pressure as functions of temperature, concentration of interstitial atoms, and film’s thickness for an interstitial binary alloy with a BCC structure based on the statistical moment method (SMM).

16p viaburame 14-03-2025 2 1   Download

Topical medications derived from traditional medicines play a crucial role in dermatological treatment, often serving as the primary therapeutic approach. The underlying causes of dermatological conditions may include external factors such as wind, cold, dampness, heat, parasites, or internal imbalances such as stagnation of qi, blood stasis or deficiencies in liver and kidney function. Treatment methods in traditional medicine may incorporate remedies, surgical interventions, or a combination of both.

6p tuongmotranh 18-03-2025 4 1   Download

To develop the Bio-pharmacology major at the university level, a comprehensive survey of invertebrate arthropods (Arthropoda) and annelids (Annelida) utilized as Vietnamese traditional medicines was conducted. The survey was organized according to six criteria: (1) Vietnamese and medicinal name, (2) classification and scientific name, (3) distribution and habitat, (4) medicinal properties, (5) pharmaceutical effects, (6) discussion and comments.

11p tuongmotranh 18-03-2025 3 1   Download

The projection, also called the symmetrization mapping, from spectral ball to symmetrized polydisc is closely related to the spectral Nevanlinna-Pick interpolation problem. We prove that the rank of the derivative of the projection from the spectral unit ball to the symmetrized polydisc is equal to the degree of the minimal polynomial of the matrix at which we take the derivative.

8p viaburame 14-03-2025 2 1   Download

In this paper, the problem of exponential stability of linear time-delay systems with mixed discrete and distributed delays is studied. Based on an asymmetric Lyapunov–Krasovskii functional approach, sufficient conditions are derived in terms of linear matrix inequalities to guarantee the exponential convergence of the system state trajectories with a prescribed decay rate.

14p viaburame 14-03-2025 7 1   Download

A benzothiazole ring plays an important role in pharmacological target diseases, including metabolic diseases, cancer, anti-inflammatory, neurodegeneration, viral diseases, bacterial infections, fibrosis, and thrombosis. Hydrazone-hydrazide derivatives are present in numerous biological molecules and play a significant role in medicine and pharmacology.

9p viaburame 14-03-2025 2 1   Download

In this work, the characterization of kaolin-based additives for the combustion of sugarcane bagasse-derived biomass was investigated using thermogravimetric-derivative thermogravimetric (TG-DTG) analysis and differential thermal analysis (DTA).

11p viaburame 14-03-2025 1 0   Download