EXPRESS: Sonoluminescence Spectroscopy Application to Analysis of Industrially Used Highly Concentrated Aqueous Solutions of Alkali Metal Chlorides

2021 ◽  
pp. 000370282110520
Author(s):  
Oleg Yurchenko ◽  
Tetyana Chernozhyk ◽  
Alexandr Baklanov ◽  
Larisa Baklanova ◽  
Alexander Rebrov ◽  
...  
Keyword(s):  
Alkali Metal ◽  
Cesium Chloride ◽  
Accurate Analysis ◽  
Metal Chlorides ◽  
Main Substance ◽  
Ultrasound Frequency ◽  
Main Components ◽  
Main Component ◽  
Saline Solutions

The use of the sonoluminescence spectroscopy for the determination of main components in concentrated aqueous solution of alkali metal halides is examined. In concentrated RCl-solutions (R=Li, Na, K; C=100–600 g•dm–3) the sonoluminescence intensity is inversely proportional to ultrasound frequency in the range from 2 МHz up to 5 МHz. In the CsCl case the inverse proportionality is disturbed at ultrasound frequencies higher than 3 MHz. This is the limiting value for the accurate analysis of the concentrated solutions of cesium chloride. The increase of initiating ultrasound frequency leads to the decreasing of sensibility of the main component determination in highly concentrated (more than 300 g∙dm–3) natural and technological solutions. Nevertheless, the metrological characteristics of the results of the main substance determination in these solutions improve. The routines of express determination of the main substance in concentrated saline solutions were developed.

Photometric determination of trace bromide in alkali metal chlorides

1973 ◽  
Vol 45 (6) ◽  
pp. 856-860 ◽  
Author(s):  
E. F. Joy ◽  
J. D. Bonn ◽  
A. J. Barnard
Keyword(s):  
Alkali Metal ◽  
Photometric Determination ◽  
Alkali Metal Chlorides ◽  
Metal Chlorides

ANALYSIS OF COMMERCIAL CAJUPUT OILS EXTRACTED FROM MELALEUCA CAJUPUTI POWELL BY GAS CHROMATOGRAPHY

2019 ◽  
pp. 7-10
Author(s):  
Thi Hoai Nguyen ◽  
Xuan Huyen Trang Hoang
Keyword(s):  
Gas Chromatography ◽  
Economic Development ◽  
Chemical Composition ◽  
Key Words ◽  
Melaleuca Cajuputi ◽  
Main Components ◽  
Main Component ◽  
Production Facilities

Background: Cajuput oil is a traditional and famous product of Thua Thien Hue, it is considered as a potential product, contributing to the economic development of Thua Thien Hue. Currently, there are many different products of cajuput oil in the market. However, the quality of cajuput oils in the production facilities has not been considered. The aim of the present study was to apply GC to the determination of the main components of commercial cajuput oils from M. cajuputi species in the Thua Thien Hue province. Materials and method: The chemical composition of 10 commercial cajuput oils extracted from leaves of Melaleuca cajuputi Powell collected in the Thua Thien Hue province was determined by gas chromatography. Results and conclusion: The major componentsofthe oils wereα-pinene, β-pinene, limonene, 1,8-cineoleand terpineol. The result obtained demonstrate that 1,8-cineole is the main component,present in 10 samples with values ranging from 15 to 59%. Key words: Cajuput oil, Melaleuca cajuputi, 1,8-cineole, α-pinene, β-pinene, limonene, terpineol

scholarly journals Utilisation of Bio-binder Made of Homogenised Peat in Crumb Rubber-containing Composites

2020 ◽  
Author(s):  
Kristine Irtiševa ◽  
Vjaceslavs Lapkovskis ◽  
Viktors Mironovs ◽  
Jurijs Ozolins ◽  
Maksim Plohuta ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Compression Strength ◽  
Value Added ◽  
Crumb Rubber ◽  
Binder Content ◽  
Block Form ◽  
Three Phase ◽  
Main Components ◽  
Main Component

The utilisation of the industrial residual products to create new value-added materials and to reduce footprint is a modern challenge of science and industry. Development of the new multifunctional and bio-based composites is an excellent opportunity for complex utilisation of industrial residual products. The study describes the preparation and characterisation of the three-phases bio-based composites. The main components are bio-based binder made of peat, devulcanised crumb rubber (DCR) from used tires and part of the fly ash the cenosphere (CS). Three-phase composite prepared in the form of a block for investigation of the mechanical properties and density and a form of granules for determination of the water and oil products sorption was investigated. This work investigated the dependence of the properties on the main component DCR and CS fraction. Is found, that maximum compression strength (in block form) observed for composition without CS and DCR addition - 79.3 MPa, the second highest value of compression strength is 11.2 MPa for composition with 27.3 wt% of CS. For compositions with bio binder content from 17.4 to 55.8 wt% and with DCR contents in range from 11.0 to 62.0 wt% compression strength is in range 1.1 to 2.0 MPa. Liquid sorption analysis (water and diesel) showed that the maximum saturation of liquids in both cases is set after 35 minutes and ranges from 1.05 to 1.4 g·g -1 for water and 0.77 to 1.25 g·g-1 for diesel. It was noted that 90% of the maximum saturation with diesel fuel comes after 10 minutes and for water after 35 minutes.

OIL CONTENT AND CHEMICAL COMPOSITION IN THE PARTS OF OIL PALM FRUIT FROM 8 IOPRI VARIETIES

2018 ◽  
Vol 24 (2) ◽  
pp. 67-76
Author(s):  
Sujadi Sujadi ◽  
Hasrul Abdi Hasibuan ◽  
Meta Rivani ◽  
Abdul Razak Purba
Keyword(s):  
Fatty Acid ◽  
Palmitic Acid ◽  
Oil Palm ◽  
Oil Content ◽  
Mean Value ◽  
Oleic Acid Content ◽  
Palm Fruit ◽  
Fruit Samples ◽  
Main Components ◽  
Main Component

Fresh fruit bunches (FFB) consist of fruit be composed grade in few spikelet. Fruit at a spikelet can be distinguished into performed fruit namely internal fruit, middle fruit and outer fruit as soon as each section contain parthenocarpy fruits. This research was conducted for determine composition and content fatty acid of oil at internal fruit, middle, outer and parthenocarpy fruit from oil palm fruit. Samples of fruit came from 3 – 5 spikelet the central of FFB. Result showed that oil content of outer fruit (46.9 + 9.9)% trend higher be compared middle fruit (42.8 + 10.3)% and internal fruit (39.1 + 9.5)%. Parthenocarpy fruits have a low oil content (14.2 + 16.2)% except yellowish fruit trend high relatively oil content. The main components of fatty acid at outer fruit, middle and internal are palmitic acid, oleic, linoleic and stearic with mean value respectively (44.8 – 45.8)%, (37.6 – 38.0)%, (9.9 – 10.9)% and (4.6 – 4.8)%. Oil content at parthenocarpy fruit have amount main component of fatty acid with performed fruit but composition of palmitic acid (40.0 + 5.9)% and oleic (34.6 + 8.4)% lower while linoleic acid (16.9 + 8.5)% and linolenic (1.6 + 1.8)% higher be compared to performed fruit. Simalungun variety has the highest oil content in the part of fruit, with that PPKS 540 and La Mé respectively. PPKS 540 variety has the highest oleic acid content while PPKS 718 has the highest linoleic content.

scholarly journals Determination of Environmental Factors for the Implementation of the Exploitability Index in Industrial Aggregate Mining Using Multi-Criteria Analysis

2021 ◽  
Vol 10 (4) ◽  
pp. 196
Author(s):  
Julio Manuel de Luis-Ruiz ◽  
Benito Ramiro Salas-Menocal ◽  
Gema Fernández-Maroto ◽  
Rubén Pérez-Álvarez ◽  
Raúl Pereda-García
Keyword(s):  
Environmental Factors ◽  
Environmental Factor ◽  
Human Life ◽  
Accurate Estimation ◽  
Analytic Hierarchy ◽  
Main Components ◽  
Hierarchy Process ◽  
Made In

The quality of human life is linked to the exploitation of mining resources. The Exploitability Index (EI) assesses the actual possibilities to enable a mine according to several factors. The environment is one of the most constraining ones, but its analysis is made in a shallow way. This research is focused on its determination, according to a new preliminary methodology that sets the main components of the environmental impact related to the development of an exploitation of industrial minerals and its weighting according to the Analytic Hierarchy Process (AHP). It is applied to the case of the ophitic outcrops in Cantabria (Spain). Twelve components are proposed and weighted with the AHP and an algorithm that allows for assigning a normalized value for the environmental factor to each deposit. Geographic Information Systems (GISs) are applied, allowing us to map a large number of components of the environmental factors. This provides a much more accurate estimation of the environmental factor, with respect to reality, and improves the traditional methodology in a substantial way. It can be established as a methodology for mining spaces planning, but it is suitable for other contexts, and it raises developing the environmental analysis before selecting the outcrop to be exploited.

scholarly journals Behavioral and Antennal Responses of Tribolium confusum to Varronia globosa Essential Oil and Its Main Constituents: Perspective for Their Use as Repellent

Molecules ◽  
2021 ◽  
Vol 26 (15) ◽  
pp. 4393
Author(s):  
Cesar Auguste Badji ◽  
Jean Dorland ◽  
Lynda Kheloul ◽  
Dimitri Bréard ◽  
Pascal Richomme ◽  
...  
Keyword(s):  
Essential Oil ◽  
Tribolium Confusum ◽  
High Dose ◽  
Synthetic Chemicals ◽  
Stored Product Pest ◽  
Indigenous Plant ◽  
Main Components ◽  
Electroantennogram Recordings ◽  
The Individual ◽  
Main Component

Essential oils of aromatic plants represent an alternative to classical pest control with synthetic chemicals. They are especially promising for the alternative control of stored product pest insects. Here, we tested behavioral and electrophysiological responses of the stored product pest Tribolium confusum, to the essential oil of a Brazilian indigenous plant, Varronia globosa, collected in the Caatinga ecosystem. We analyzed the essential oil by GC-MS, tested the effects of the entire oil and its major components on the behavior of individual beetles in a four-way olfactometer, and investigated responses to these stimuli in electroantennogram recordings (EAG). We could identify 25 constituents in the essential oil of V. globosa, with anethole, caryophyllene and spathulenole as main components. The oil and its main component anethole had repellent effects already at low doses, whereas caryophyllene had only a repellent effect at a high dose. In addition, the essential oil abolished the attractive effect of the T. confusum aggregation pheromone. EAG recordings revealed dose-dependent responses to the individual components and increasing responses to the blend and even more to the entire oil. Our study reveals the potential of anethole and the essential oil of V. globosa in the management of stored product pests.

scholarly journals Characterization of the Antibiotic Compound No. 70 Produced byStreptomycessp. IMV-70

2012 ◽  
Vol 2012 ◽  
pp. 1-8 ◽  
Author(s):  
Lyudmila P. Trenozhnikova ◽  
Almagul K. Khasenova ◽  
Assya S. Balgimbaeva ◽  
Galina B. Fedorova ◽  
Genrikh S. Katrukha ◽  
...  
Keyword(s):  
Optimal Growth ◽  
Growth Conditions ◽  
Culture Broth ◽  
Producer Strain ◽  
New Class ◽  
New Antibiotics ◽  
Actinomycete Strain ◽  
Main Component

We describe the actinomycete strain IMV-70 isolated from the soils of Kazakhstan, which produces potent antibiotics with high levels of antibacterial activity. After the research of its morphological, chemotaxonomic, and cultural characteristics, the strain with potential to be developed further as a novel class of antibiotics with chemotherapeutics potential was identified asStreptomycessp. IMV-70. In the process of fermentation, the strainStreptomycesspp. IMV-70 produces the antibiotic no. 70, which was isolated from the culture broth by extraction with organic solvents. Antibiotic compound no. 70 was purified and separated into individual components by HPLC, TLC, and column chromatography methods. The main component of the compound is the antibiotic 70-A, which was found to be identical to the peptolide etamycin A. Two other antibiotics 70-B and 70-C have never been described and therefore are new antibiotics. The physical-chemical and biological characteristics of these preparations were described and further researched. Determination of the optimal growth conditions to cultivate actinomycete-producer strain IMV-70 and development of methods to isolate, purify, and accumulate preparations of the new antibiotic no. 70 enable us to research further the potential of this new class of antibiotics.

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