Sampling method
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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 3 2 Download
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The main objective of this study is to examine the effect of intellectual capital, debt policy, company size, supply chain and liquidity on earnings per share and dividends per share as intervening variables in companies registered in the LQ 45 stock market index that consists of 45 companies for the 2014-2016 period in Indonesia. Using a purposive sampling method obtained data (panels) of 60 observation data from 20 companies.
7p longtimenosee09 08-04-2024 4 1 Download
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Compare to other documents, our study was for the first time validated the quality criteria of ICP-MS for analyzing nineteen metal levels in wastewater samples. The application of this method was then tested by analyzing nineteen metal levels in twenty-three wastewater samples in the Tham Luong Canal in Ho Chi Minh City. Based on these results, the correlation of the concentration of these metals in wastewater samples was determined.
7p viengels 25-08-2023 7 3 Download
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Amorphous alloy ribbons of (Fe50Ni50)73.5Si13.5B9Nb3Cu1 were fabricated by rapid cooling technique on single copper wheel. After fabrication, the crystalline structure of the ribbons were examined by X-ray diffraction method. The results show that the samples possess a complete amorphous state.
6p viberkshire 09-08-2023 12 5 Download
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The incidence of hypervirulent epidemic Clostridium difficile has increased around the world and now in Australia. Assays that are capable of rapidly identifying these strains would enable earlier diagnosis and timely infection control response. The aims of the first part of the study were to validate and develop a molecular technique for the rapid diagnosis of toxigenic C.
134p runthenight07 01-03-2023 8 2 Download
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The objectives of the present study are: Justifying the possibility of using laser cladding technology as a repair method for refurbishment of worn railway axles without jeopardizing their fatigue properties; Analysis of crack initiation and propagation in laser clad samples.
130p runthenight07 01-03-2023 6 3 Download
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The thesis is organised as follows: Chapter 1 comprises the literature review of protein structure, amyloid fibrils and of the effect of nanomaterials on protein aggregation. Chapter 2 reviews the computational methods used to perform simulations and analysis. Chapter 3 comprises my published article on benchmarking forcefields and sampling methods for disordered proteins using amylin as a case study. Chapter 4 comprises my published article on the effect of oxidation on the properties of graphene oxide flakes in solution.
56p runthenight04 02-02-2023 11 3 Download
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This thesis consists of seven chapters. Chapter 1 provides a brief summary of the background of the study in addition to a discussion of the importance of safety, the evolution of aviation safety, an overview of the research context, the research objectives and questions, the significance of the research, and the structure of the thesis. Chapter 2 discusses military safety and in particular, the Indonesian military. Chapter 3 presents a literature review of culture in general and safety culture in particular, and the literature referenced to support the research questions.
244p runthenight04 02-02-2023 4 1 Download
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This research investigates a means of negating such shortcomings and reaping the benefits of both LPBF additive manufacturing and traditional manufacturing methods by joining such parts together using laser welding in the autogenous mode (no fillers required). Based on the literature review conducted in this field and the gaps identified, a two-stage methodology was utilised, as per following.
191p runthenight04 02-02-2023 5 4 Download
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The aim of this study was to analyze the level of CD33 expression in patients with newly diagnosed AML and determine its correlation with clinical characteristics. Methods: Samples were collected for analysis from AML patients at diagnosis. We evaluated the level of CD33 expression by flow cytometry analysis of bone marrow.
7p vielonmusk 21-01-2022 14 1 Download
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Aim of the thesis: Development of a new method for determining concentration of the radionuclides in enviromental samples by mean of gamma spectroscopy. Establishing a data set of the soil-plant transfer factor (TF) of radionuclides 238U, 232Th and 40K for some vegetables in Truong Sa island and that of 238U, 232Th, 40K and 137Cs for tea tree from Luong My farm, Hoa Binh province, Vietnam and evaluate the influence of natural radionuclide concentration to the soil-plant transfer process of artificial radionuclide 137Cs.
30p extraenglish 24-05-2021 22 3 Download
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Developed a chemometric-photometric analysis process in combination with Kalman filter method to simultaneously analyze mixtures of 2 and 3 substances with molecular absorption spectra overlapping in pharmaceutical samples; apply the process has been built to simultanneously analyze mixtures 2 and 3 substances in some pharmaceuticals are on the market Vietnam.
26p nguathienthan12 23-05-2021 22 2 Download
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Speaking skill is one of the most necessary skills to communicate in the real life. In learning a foreign language, it is more and more important to learn this skill. This study aims to enhance the oral communication skills (conversations) of HPU (Hải Phòng Private University) first-year English majors. The sample of the study consists of 25 students (20 female students and 5 male students from NA2101); all of them are juniors students at English department (ED) at HPU. I have used random sample method.
44p nguathienthan12 18-05-2021 34 5 Download
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The aim and content of research: Establishing scientific basis and method of analyzing the law of sound velocity change in seawater in the Gulf of Tonkin region of Vietnam to complete the process of sampling sound velocity to effectively exploit hydroacoustics equipment.
20p dolphintaletale 23-04-2021 25 4 Download
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India is the most popular country for the production of poultry eggs which lead to the problem with the disposal off spent hens. Utilization of such spent hen meat is a big challenge to modify into potential palatable value-added products. The present study was carried out to study the shelf life of spent hen meat papad stored at ambient temperature.
9p chauchaungayxua10 19-03-2021 16 2 Download
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The object of this study is the two groups of factors of human capital, including personality traits (noncognitive human capital), experience, and education (cognitive human capital) and SEI. The author coordinated with the Vietnam Social Enterprises Community (SSEC) to collect data from individuals participating in social entrepreneurship-related activities. The sample in this study is selected according to the conventional method. The questionnaire survey link created on Google Forms is sent to individuals who participate in the activities organized by SSEC.
24p caygaocaolon10 19-02-2021 20 2 Download
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Develop a rapid and simple method for analysis of multi-residue pesticides, including organophosphate, organochlorine, carbamate, and pyrethroid compounds in soil, with sample preparation based on QuEChERS technique and determination by GC-MS.
26p capheviahe26 25-01-2021 28 3 Download
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Research to develop an analytical method for methyl mercury in biological samples with high sensitivity, selectivity, and accuracy; research and assessment of the transformation and bioaccumulation of mercury in sediment and biological samples in Than Sa gold mining area, Vo Nhai district, Thai Nguyen province.
27p capheviahe26 25-01-2021 23 4 Download
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In this paper, we present one method to determine the band gap energy of ZnO and ZnO:Tb3 materials. ZnO:Tb3 material has prepared by forced hydrolysis method. All samples have zinc oxide hexagonal wurzite structure. The obtained results show that the energy of the band gap depends on Tb3 molar ratio.
6p tamynhan5 10-12-2020 9 1 Download
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The present study was carried out on Mustard crop in Karauli District of Rajasthan. Objective of the study is to see the extent of adoption level of improved production practices of Mustard by the farmers. For the study purpose ten villages selected with simple random sampling method. Data collected and tabulated under statistical manner.
7p gaocaolon9 22-12-2020 11 2 Download