Bài báo mới

Bacterial cellulose (BC) is a promising polymer due to its ability to manage wound exudation and create a moist environment conducive to healing, alongside its high tensile strength. The natural form of BC hydrogel prevents it from maintaining its shape; therefore, water needs to be removed. The preparation of BC for wound dressing use often […]

Introduction: This study aimed to optimize the conditions of ultrasound-assisted extraction to simultaneously obtain the highest yields of polysaccharides and polyphenols from passion fruit (Passiflora edulis) peels. Methods: Box–Behnken design (BBD) and response surface methodology were employed for the optimization. The factors and their levels studied in BBD included a solvent-to-solid ratio (X1) of 30-70 […]

Condoms serve as a method of birth control. During sexual activity, silicon condom lubricant lowers friction and the chances of harm. Additionally, it increases the protection against STIs, including HIV, by decreasing the likelihood that they may break or fall off. The aim of this study was to perform microbiological and molecular assessments of silicon […]

Various noises and artifacts affect EEG (electroencephalogram) signals and should be removed for effective diagnosis and treatment. The adaptive filter is designed using adders, multipliers and delay elements. In this paper, the design of the adder is presented. The adders form the foundational block of all arithmetic and computational processes of biomedical systems. They form […]

Introduction: α-Fe2O3 nanorods (α-Fe2O3 NRs), also known as hematite, possess a narrow band gap, high chemical stability, extensive surface area, controllable size, and outstanding photoelectric properties. These attributes make hematite a promising material for various applications, including gas sensors, optical sensors, and notably, photocatalysis. In previous studies, α-Fe2O3 nanorods were synthesized using various processes. However, […]

The development of an oxidized bacterial cellulose membrane (OBC) for hemostasis application is essential for preventing death from excessive bleeding. In previous research, OBC membranes were fabricated by using many different oxidation systems, notably the HNO3/H3PO4-NaNO2 system. In this study, the effects of oxidation conditions, such as temperature and reaction time, on the structure and […]

This paper proposes a convolutional neural network (CNN) method for human motion detection and tracking on a quadcopter. To address the challenges mentioned above, the proposed methodology is designed on computer vision techniques with an object tracking algorithm and a CNN model. The object tracking algorithm is implemented using a proportional integral differential (PID) controller […]

Introduction: Pyrolysis of plastic is a green technology for converting plastic into fuel. This work studies the thermal and catalytic pyrolysis of polyethylene. Methods: In this work, polyethylene was pyrolyzed in a batch reactor at temperatures ranging from 500 to 600 °C. Acid oxides (Al2O3 and TiO2) and base oxides (MgO and CaO) were used […]

Introduction: Glycerol tert-butyl ethers (GTBEs) can be used as diesel additives due to their physico-chemical properties, such as flash point, viscosity, and cetane number. GTBEs were produced from the reaction between tert-butyl alcohol and glycerol using a stirred reactor at moderate temperatures. This study aims to discuss the effect of reaction conditions on the etherification […]

Introduction: In this work, we developed a wireless, remote, real-time radiation monitoring system designed to oversee beam delivery in a radiation therapy room equipped with a medical linear accelerator (LINAC). Methods: This system utilizes a Geiger-Müller detector paired with embedded electronic hardware to accurately record radiation count rates in real-time. The data collected by this […]

Introduction: Although poly(styrene sulfonic acid) (PSSA)-grafted poly(ethylene-co-tetrafluoroethylene) polymer electrolyte membranes (ETFE-PEMs) are potential polymer electrolyte membranes for fuel cells, there are only a few reports on the effect of synthesis steps and grafting degree (GD) on the features of ionic domains. These ionic features are related to the conductance and thus directly affect the fuel […]

Let $(R, \frak m)$ be a Noetherian local ring, $I$ an ideal of $R$ and $M$ a finitely generated $R$-module with $\dim_R(M)=d$. The annihilator of the top local cohomology module $H_I^d(M)$ related to the catenarity of the ring is given in this paper.

Heavy metals and persistent organic pollutants (POPs) in surface and core sediments can reflect the status and trend of pollution in the study area and help to assess negative impacts on the ecosystem. However, comprehensive studies dealing with multiple classes of inorganic and organic contaminants, such as toxic heavy metals and POPs, in sediment core […]

Introduction: This study, which was first conducted in Vietnam, aimed to develop a multivariable and simple-variable linear regression model from the direct measurement of the UV‒Vis absorption of copper(II) ions in aqueous solution without using other reagents (chelating agents and solvents), which reduces environmental pollution and analysis fees. Methods: Simple-variable and multivariable linear regression models […]