Extraction method

In the present study, we aimed to evaluate the lead (Pb) partitioning and its ecological risks in tidal creek sediments within the Can Gio mangrove estuary by using a method of sequential extraction.

9p viengfa 28-10-2024 1 1   Download

In this study, we investigated some conditions affecting the extraction of total carotenoids from R. mucilaginosa using environmentally friendly chemicals: cell disruption conditions with organic acids combined with ultrasound-assistant method, using ethanol and petroleum ether solvents to replace acetone in the process of extracting total carotenoids to obtain a benign product, easy to apply in food.

8p viling 11-10-2024 1 0   Download

In this report, the solid phase extraction technique combined with the gas chromatographymass spectrometry method (GC-MS) was optimized to determine the contamination of nine phthalic acid esters (PAEs) in the surface sediment samples collected from Rao Cai River in Ha Tinh, Vietnam.

7p vifilm 11-10-2024 0 0   Download

In this paper, a membership function of the form S-function is applied to improve the quality of extracted linguistic summaries. Besides, the applied algorithm is parallelized to reduce running time. The experimental results with the creep dataset have demonstrated the effectiveness of the proposed method.

12p vibecca 01-10-2024 2 1   Download

This study provides an assessment of the impact of increased temperature in Ba Ria - Vung Tau province based on surface temperature values extracted from thermal infrared Landsat image data during the period 2010-2021.

15p vibecca 01-10-2024 1 0   Download

Zero valent iron (ZVI) nanoparticles have been considered as effective materials for environmental remediation because of their strong reducing ability, high reaction activity, and excellent absorption properties. In this study, we synthesized iron nanoparticles using an environmentally friendly method in order to treat Cr(VI) ions in an aqueous medium.

8p vibecca 01-10-2024 0 0   Download

This study, therefore, investigated the determinants of the labor productivity of garment firms in Nam Dinh province. The data used for this study were extracted from the Enterprise Survey Dataset in 2021, and descriptive statistics, comparative analysis, and the Cobb-Douglas function in logarithm form were the major methods employed for the study.

9p vibecca 01-10-2024 2 1   Download

In this study, nHAp/CS@β–CD–E nanocomposite has been synthesized by incorporating of chitosan (CS), β-cyclodextrin (β-CD), and Ficus pumila (L.) leaf extract with nano-hydroxyapatite (nHAp) via coprecipitation method. Meanwhile, the nHAp obtained from seashells as the starting material sources.

6p vikwong 29-09-2024 4 0   Download

A series of Mg-Cu-Al hydrotalcite/chitosan materials have been synthesized via a co-precipitation method, in which chitosan is synthesized from chitin extraction from waste shrimp shells. The obtained solids were characterized by XRD, BET, EDX, IR techniques. The materials have a well crystallized hydrotalcite structure and medium surface area.

5p vikwong 29-09-2024 1 0   Download

This study seeks to propose a method to automatically assess unsafe postures of lifting and carrying heavy objects by combining the RTMPose deep learning model to detect people from videos and a convolutional neural network (CNN) model to automatically extract, evaluate and classify the worker’s posture skeleton frames into two states “safe posture” and “unsafe posture”.

12p vifaye 20-09-2024 3 1   Download

This research is conducted to evaluate the acute and subchronic toxicities of the extract of Jasminum subtriplinvere Blume leaves through oral administration in experimental animals. The acute toxicity was determined by the Litchfield Wilcoxon method in Swiss mice.

12p vinatisu 23-08-2024 3 1   Download

In this study, we evaluated and compared the effectiveness of four different protocols (D, MJ, MA, and S) for separating MPs from water of different types (brackish, marine, and river). Known combinations of MP particles (polyethylene (PE), polyethylene terephthalate (PET), polystyrene (PS) and polyvinyl chloride (PVC) with size ranging between 150 μm and 700 μm were spiked into water samples. Our results showed that the average recovery effectiveness of microplastics using four studied methods ranged from 53% to 86%.

10p dianmotminh02 03-05-2024 5 3   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 6 2   Download

Semantic extraction from images is a topical problem and is applied in many different semantic retrieval systems. In this paper, a method of image semantic retrieval is proposed based on a set of images similar to the input image. Since then, the semantics of the image are queried on the ontology by the visual word vector.

20p vimurdoch 18-09-2023 7 3   Download

The aim of the research was the processing of the vibration signatures from healthy and damaged composite beams acquired with the help of a Scanning Laser Vibrometer (SLV) upon excitation and analysis of the mode shapes acquired for damage detection. The displacement mode shapes acquired were then converted into curvature mode shapes with the help of a Central Difference Approximation method (CDA).

146p runthenight07 01-03-2023 6 3   Download

The main purpose of the research "Rule extraction method for identifying solar PV generation" is to evaluate the applicability of rule extraction through interim summarisation to the problem of identifying electricity customers who have solar PV systems installed from their electricity consumption data.

112p runthenight04 02-02-2023 5 2   Download

This thesis reports research conducted to: Determine antioxidant capacity of dry and fresh calyxes of Hibiscus sabdariffa; Validate the HPLC method for analysis of the key antioxidant phytochemicals of Hibiscus sabdariffa; Quantify the amounts of key antioxidants in the extracts of Hibiscus sabdariffa calyxes.

130p runordie3 06-07-2022 8 3   Download

The timing of the deposition of the well-preserved Quaternary marine terraces in the coastal region of northeastern Turkey are crucial in understanding the Quaternary tectonics of the Pontides. The chronology of raised marine terraces between Trabzon and Rize has remained unrevealed because of chronologic limitations. This study aims to establish chronology for the terrace deposits by applying optically stimulated luminescence (OSL) dating methods using single aliquot regenerative dose (SAR) techniques on quartz grains extracted from marine terraces.

20p tanmocphong 29-01-2022 22 1   Download

Classification of rocks is one of the basic parts of geological research and is a difficult task due to the heterogeneous properties of rocks. This process is time consuming and requires sufficiently knowledgeable and experienced specialists in the field of petrography. This paper has a novelty in classifying plutonic rock types for the first time using thin section images; and proposes an approach that uses the deep learning method for automatic classification of 12 types of plutonic rocks.

10p tanmocphong 29-01-2022 15 1   Download

Lithium (Li) is the lightest metal, has unique physicochemical properties and is the main component of lithium-ion batteries. Rechargeable lithium-ion batteries play a very important role in maximizing the performance of electric devices and vehicles. It is predicted that the metal and mineral demand for lithium-ion batteries will increase 56 times by 2050. In order to meet the increasing demand, in addition to known methods, lithium recovery from geothermal waters has become a very popular research subject.

13p tanmocphong 29-01-2022 24 2   Download