Dissolution of Zirconium Power and Detection of Zirconium Powder Content by ICP-AES Method

2014 ◽  
Vol 936 ◽  
pp. 1571-1575
Author(s):  
Xiao Lian Zhang ◽  
Wei Hua Zhu ◽  
Xin Zheng ◽  
Hong Xia Liu
Keyword(s):  
Atomic Emission ◽  
Deionized Water ◽  
Analysis Method ◽  
Plasma Atomic Emission ◽  
Factors Affecting ◽  
Instrument Analysis ◽  
Main Factors ◽  
Effects Of Temperature ◽  
Powder Content ◽  
Zirconium Powder

Instrument analysis method is used in this experiment, which detecting the zirconium content of zirconium powder by using plasma-atomic emission spectrometer. In this experiment, the instrumental detective conditions were determined, and analyzed several main factors affecting the experimental results, concluded the effects of temperature, hydrofluoric acid and deionized water on dissolving zirconium powder, summarized the method to detect zirconium powder content directly by ICP.

scholarly journals Analysis of Mercury in Skin Lightening Cream by Microwave Plasma Atomic Emission Spectroscopy (MP-AES)

Molecules ◽  
2021 ◽  
Vol 26 (11) ◽  
pp. 3130
Author(s):  
Hardoko I. Qudus ◽  
Purwadi Purwadi ◽  
Iis Holilah ◽  
Sutopo Hadi
Keyword(s):  
Emission Spectroscopy ◽  
Microwave Plasma ◽  
Atomic Emission ◽  
Atomic Emission Spectroscopy ◽  
Solution Stability ◽  
Analysis Method ◽  
Plasma Atomic Emission ◽  
Relative Standard ◽  
The Stability ◽  
Skin Lightening

This research aimed at developing an analysis method, which was optimized and validated to determine the content of mercury in skin lightening cream discovered in the market in Bandar Lampung, Indonesia, through the use of microwave plasma atomic emission spectroscopy (MP-AES). The optimization on the analysis method was conducted on pump rate, viewing position, and reductant concentration in order to obtain the highest mercury emission intensity, while the solution stability was optimized to know the stability of mercury in the solution. The result showed that the method developed had precision with a relative standard deviation of 2.67%, recovery value of 92.78%, and linearity with an r value of 0.993, respectively. The sensitivity of the instrument detection had a limit of analysis method detection and quantification of 0.59 and 1.98 µg/L, respectively. The results of the test of the lightening cream (8 of 16 samples) positively contained mercury in the range of 422.61–44,960.79 ng/g. Therefore the method of analysis developed may be used for routine analysis of chemicals in any cosmetics products.

Impact factor analysis of aquatic species diversity in the Huai River Basin, China

2019 ◽  
Vol 19 (7) ◽  
pp. 2061-2071
Author(s):  
Hao Chen ◽  
Qi-ting Zuo ◽  
Yong-yong Zhang
Keyword(s):  
Species Diversity ◽  
River Basin ◽  
Environmental Indicators ◽  
Analysis Method ◽  
Factors Affecting ◽  
Physicochemical Variables ◽  
Huai River Basin ◽  
Huai River ◽  
Main Factors ◽  
The Huai River Basin

Abstract Water pollution has been a significant issue in the Huai River Basin (HRB) of China since the late 1970s. From December 2012, five experiments were carried out along the main streams of the HRB. The monitoring indices contained physicochemical variables, habitat environmental indicators and the community structure of phytoplankton, zooplankton and zoobenthos. The correlations between species diversity and physicochemical variables were analyzed using cluster analysis, correlation analysis method and redundancy analysis method. Results indicated that the species diversities of the Shaying River's upstream and Huai River's mainstream were better than the Shaying River's midstream and downstream. All the sections were divided into five clusters, and different clusters were affected by different physicochemical factors. Dissolved oxygen (DO), habitat quality index (HQI) and chemical oxygen demand (CODCr) were the main factors affecting the species diversity of the Shaying River's upstream; total phosphorus (TP), total nitrogen (TN), ammonia nitrogen (NH4-N), CODCr and permanganate index (CODMn) had a great influence on the Shaying River's midstream and downstream; DO, water temperature (WT), HQI and CODCr were the main factors affecting the Huai River's mainstream. These results provide valuable information for policy decision makers and stakeholders on water quality assessment, water ecosystem restoration, and sustainable watershed management in the HRB.

Atomic emission spectrometry in liquid electrode plasma using an hourglass microchannel

2015 ◽  
Vol 30 (10) ◽  
pp. 2125-2128 ◽  
Author(s):  
Yoshinobu Kohara ◽  
Yasushi Terui ◽  
Megumi Ichikawa ◽  
Kazuko Yamamoto ◽  
Toshihiro Shirasaki ◽  
...  
Keyword(s):  
High Voltage ◽  
Elemental Analysis ◽  
Vapor Bubble ◽  
Atomic Emission ◽  
Atomic Emission Spectrometry ◽  
Emission Spectrometry ◽  
Analysis Method ◽  
Plasma Atomic Emission ◽  
Plasma Atomic Emission Spectrometry ◽  
Liquid Electrode

Liquid electrode plasma atomic emission spectrometry (LEP-AES) is a new elemental analysis method that uses microplasma. LEP forms in a vapor bubble generated inside a narrow-center microchannel by using high-voltage DC pulse power.

The Study about Fuel Tank Flammability Analysis Method of Civil Aircraft

2013 ◽  
Vol 333-335 ◽  
pp. 2097-2100 ◽  
Author(s):  
Wei Fan Liu ◽  
Tao Zeng ◽  
Min Fan
Keyword(s):  
Monte Carlo ◽  
Engineering Application ◽  
Fuel Tank ◽  
Analysis Method ◽  
Factors Affecting ◽  
The Monte Carlo Method ◽  
Aircraft Fuel ◽  
Civil Aircraft ◽  
Quantitative Analysis Method ◽  
Main Factors

This article discusses the aircraft fuel tank flammability. Firstly, Given the qualitative analysis of aircraft fuel tank flammability, Based on this, Detailed discussion of the quantitative analysis method based on the Monte Carlo method of aircraft fuel tank, and verified through the instance. The results show that the analysis can determine the main factors affecting fuel tank flammability and fuel tank flammable levels of exposure. And have engineering application value on aircraft fuel tank safety.

scholarly journals Theoretical analysis of factors affecting the development of logistics centre

2020 ◽  
Author(s):  
Nadina Moroza ◽  
◽  
Inguna Jurgelane-Kaldava ◽  
Keyword(s):  
Qualitative Analysis ◽  
Scientific Literature ◽  
Service Level ◽  
Great Success ◽  
Analysis Method ◽  
Factors Affecting ◽  
Efficient Management ◽  
Factors Influencing ◽  
Main Factors ◽  
Stable Growth

Profitable logistics complex system is an important factor for stable growth in economics of the state. Efficient management is the key to success, especially in logistic sector. To achieve great success in logistics it is decisive to understand and analyse all factors which influence on development of current sector. The aim of the present study was to review scientific literature about the factors affecting development of logistics centre. Furthermore, the sustainability construction qualitative analysis method was employed as basis to conduct the research. Based on the literature, authors defined different factors influencing on the development of logistics centre and conducted groups of factors. Using qualitative analysis, the author developed main factors and elaborated definitions for each factor to provide information about included sub-factors. Service level was indicated as one of the important categories. It shows level of clients’ satisfaction with service given by the logistic centres. Finally, all factors were ranged by importance, to show gradation and influence on development.

scholarly journals Morphomolecular characterization of Pleurotus ostreatus (Jacq. Fr.) kummer strains in relation to luminosity and temperature of frutification

2003 ◽  
Vol 60 (3) ◽  
pp. 531-535 ◽  
Author(s):  
Regina Helena Marino ◽  
Augusto Ferreira da Eira ◽  
Eiko Eurya Kuramae ◽  
Elvio Cardoso Queiroz
Keyword(s):  
Genetic Variability ◽  
Molecular Characterization ◽  
Pleurotus Ostreatus ◽  
Random Amplified Polymorphic Dna ◽  
Factors Affecting ◽  
Formation Pattern ◽  
Main Factors ◽  
Effects Of Temperature ◽  
Rapd Method

Temperature is one of the main factors affecting mushrooms development and introduction in new areas. Effects of temperature (15ºC and 28ºC) and luminosity (120 and 900 lux) were evaluated for eight P. ostreatus strains in relation to precocity, yield, pileus area, stalk formation pattern, coloration and handling resistance. Genetic variability of strains was analysed by the Random Amplified Polymorphic DNA (RAPD) method. The Pos 98/37 strain was the only to yield white pileus at 28ºC - 900 lux, and grey ones at 15ºC and 120 lux. The Pos 96/05 strain, the latest, produced lead-coloured pileus at 15ºC, as did the remaining strains at this temperature. Strains cultivated at 15ºC did not differ in relation to handling resistance. At 28ºC mushrooms were less resistant. In relation to yield, the Pos 98/38 strain was significantly more efficient. The Pos 98/37 strain, at 28ºC, as compared to the same strain at 15ºC, was more efficient and had an asymmetric stalk formation pattern. Among strains cultivated at 15ºC, the stalk formation pattern was symmetric, except for the Pos 97/15 and Pos 97/17 strains. Molecular characterization of the Pos 98/37 strain was 30% similar to the remaining strains. The temperature of fructification and luminosity influence the induction and development of the isolates.

scholarly journals Method of evaluating indicator of the quality of development and commissioning the automated system for preparing aircraft flight data

2020 ◽  
Author(s):  
A.G. Andreev ◽  
G.V. Kazakov ◽  
V.V. Koryanov ◽  
N.N. Kotyashev
Keyword(s):  
Methodological Approach ◽  
Automated System ◽  
Analysis Method ◽  
Factors Affecting ◽  
Flight Data ◽  
Aircraft Flight ◽  
Hierarchy Analysis ◽  
Main Factors ◽  
Mathematical Processing

The quality of development and commissioning the automated system for preparing aircraft flight data (ASPD) depends on many factors, among which it is necessary to identify and justify those most significantly affecting quality of the system being commissioned. The practice of designing an ASPD has shown that the quality assessment based on its characteristics is nothing more than a consequence. This situation is due to the presence of deeper factors that will only appear during the operation of the system. To eliminate this situation, the problem is formulated as a task of determining the factors affecting the quality of development and commissioning the system, based on the data obtained by mathematical processing of expert estimates of each factor significance. To solve this problem, it is proposed to use the hierarchy analysis method. Developed on its basis the methodological approach makes it possible: – to identify the main factors significantly affecting the quality of the ASPD being commissioned, and to propose qualitative scales for assessing the degree of feasibility of each generic criterion; – to formalize a multi-criteria indicator of the degree of the ASPD quality compliance with the requirements of generic criteria and obtain its dependence on the levels of development and commissioning the system; – to justify the requirements for ASPD operational suitability, perform its evaluation, as well as determine the necessary measures for implementing the specified requirements on operational and technical characteristics of the ASPD.

Moving on the Chain: Push-Pull Factors Affecting the Migration of Laotian Workers to Udon Thani, Thailand

2018 ◽  
Vol 5 (2) ◽  
pp. 99-105
Author(s):  
Thanapauge Chamaratana ◽  
Thawatchai Sangseema
Keyword(s):  
Social Network ◽  
Additional Data ◽  
Analysis Method ◽  
Pull Factors ◽  
Factors Affecting ◽  
Content Analysis Method ◽  
Depth Interview ◽  
Additional Data Collection ◽  
Study Unit ◽  
Participatory Observation

Abstract The tendency of migration of Lao workers to Thailand is likely to increase especially migration pattern is social network. The objective of this research was to study factors effecting the migration through social network of Lao workers in Udon Thani. Qualitative research method was applied in the study. Unit of analysis was group level. In-depth interview guideline was applied to collect data from 15 Laotian workers. The research site was Udon Thani, Thailand. Participatory observation and non-participatory observation were use for additional data collection. The ATLAS.ti programme was applied to categorize data, and data analysis was based on the content analysis method. The research results showed that the crucial push factors which contributed migration among Laotian workers included Udon Thani Unemployment in residency, and low revenue in residency and important pull factors include higher compensation, worker demand of establishments in Udon Thani province, Laotian employers' values in Udon Thani, and social network of Laotian workers in destination.

Recent Rapid Climate Changes in Antarctic and their Influence on Low Diversity Ecosystems

2010 ◽  
Vol 17 (1) ◽  
pp. 17-30 ◽  
Author(s):  
Katarzyna J. Chwedorzewska
Keyword(s):  
Environmental Variables ◽  
Climate Changes ◽  
Biological Significance ◽  
Global Changes ◽  
Factors Affecting ◽  
Low Diversity ◽  
Main Factors ◽  
The Antarctic ◽  
High Diversity ◽  
Temperature Water

ABSTRACTThe geographic position, astronomic factors (e.g. the Earth’s maximum distance from the Sun during winter), ice cover and altitude are the main factors affecting the climate of the Antarctic, which is the coldest place on Earth. Parts of Antarctica are facing the most rapid rates of anthropogenic climate change currently seen on the planet. Climate changes are occurring throughout Antarctica, affecting three major groups of environmental variables of considerable biological significance: temperature, water, UV-B radiation.Low diversity ecosystems are expected to be more vulnerable to global changes than high diversity ecosystems

Rapid Catalyst Capture Enables Metal-Free Parahydrogen-Based Hyperpolarized Contrast Agents

2018 ◽  
Author(s):  
Danila Barskiy ◽  
Lucia Ke ◽  
Xingyang Li ◽  
Vincent Stevenson ◽  
Nevin Widarman ◽  
...  
Keyword(s):  
Magnetic Resonance ◽  
Contrast Agents ◽  
Inductively Coupled Plasma ◽  
Organometallic Compounds ◽  
Atomic Emission ◽  
Platinum Group Metals ◽  
Resonance Spectroscopy ◽  
Plasma Atomic Emission ◽  
Inductively Coupled

<p>Hyperpolarization techniques based on the use of parahydrogen provide orders of magnitude signal enhancement for magnetic resonance spectroscopy and imaging. The main drawback limiting widespread applicability of parahydrogen-based techniques in biomedicine is the presence of organometallic compounds (the polarization transfer catalysts) in solution with hyperpolarized contrast agents. These catalysts are typically complexes of platinum-group metals and their administration in vivo should be avoided.</p> <p><br></p><p>Herein, we show how extraction of a hyperpolarized compound from an organic phase to an aqueous phase combined with a rapid (less than 10 seconds) Ir-based catalyst capture by metal scavenging agents can produce pure parahydrogen-based hyperpolarized contrast agents as demonstrated by high-resolution nuclear magnetic resonance (NMR) spectroscopy and inductively coupled plasma atomic emission spectroscopy (ICP-AES). The presented methodology enables fast and efficient means of producing pure hyperpolarized aqueous solutions for biomedical and other uses.</p>

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