scholarly journals Measurement of welding fume production in welding with high-alloy electrodes

2021 ◽  
Vol 1208 (1) ◽  
pp. 012014
Author(s):  
Razija Begić
Keyword(s):  
Stainless Steel ◽  
Chemical Composition ◽  
Structural Steel ◽  
Base Material ◽  
Welding Fumes ◽  
Welding Fume ◽  
High Alloy ◽  
Complex Chemical ◽  
Complex Chemical Composition ◽  
Coated Electrodes

Abstract Due to their good structural properties, stainless Cr-Ni steels have a very wide application in various branches of technology. During the welding of stainless Cr-Ni steels with high-alloy coated electrodes, welding fumes of complex chemical composition are generated, which is very harmful for welders and the environment. For the purposes of this experiment, two variants of one rutile Cr-Ni commercial electrode, designated E 23 12 2 LR 12, were designed and fabricated. Higher production of welding fume particles also means greater danger to humans and the environment. In order to show the influence of the base material on the production of welding fume particles, an experiment for measuring the production of welding fume particles was performed in which two different steels were used as the base material, general structural steel S235JRG2 and stainless steel X6CrNiTi18.10.

Behavior of Some Varieties in the Kernel Group to the Attack of the Main Pathogens

2018 ◽  
Vol 12 (2) ◽  
pp. 1-7
Author(s):  
Sînziana Venera Morărița
Keyword(s):  
Chemical Composition ◽  
Climatic Conditions ◽  
Complex Chemical ◽  
Complex Chemical Composition ◽  
Large Production ◽  
Special Quality

Abstract Although relatively recent, peach culture has grown great in our country due to the special quality of the fruit, its very complex chemical composition and the large production that can be obtained without much effort. Peach is a species slightly adapted to our climatic conditions, suffers from winter frost, but can provide productive and long productions of 10-15 years.

Beans (Phaseolus vulgaris L.): whole seeds with complex chemical composition

2018 ◽  
Vol 19 ◽  
pp. 63-71 ◽  
Author(s):  
Francine Gomes Basso Los ◽  
Acácio Antonio Ferreira Zielinski ◽  
José Pedro Wojeicchowski ◽  
Alessandro Nogueira ◽  
Ivo Mottin Demiate
Keyword(s):  
Chemical Composition ◽  
Phaseolus Vulgaris ◽  
Phaseolus Vulgaris L ◽  
Complex Chemical ◽  
Complex Chemical Composition

scholarly journals Experimental study of the stability and synthesis of the tourmaline supergroup minerals

2019 ◽  
Vol 64 (10) ◽  
pp. 1064-1078
Author(s):  
T. V. Setkova ◽  
V. S. Balitsky ◽  
Yu. B. Shapovalov
Keyword(s):  
Experimental Study ◽  
Growth Rate ◽  
Chemical Composition ◽  
Chemical Stability ◽  
Hydrothermal Solutions ◽  
High Chemical ◽  
Complex Chemical ◽  
Complex Chemical Composition ◽  
The Stability ◽  
High Chemical Stability

Tourmaline is one of the most widespread minerals in nature and one of the most popular gems and promising piezoelectric material. The growth of large crystals is today a topical task. With the growth of tourmaline single crystals appears problems associated with its complex chemical composition, high chemical stability in hydrothermal solutions and a low growth rate. The paper reviews of recent work on the tourmaline synthesis and the results obtained in IEM RAS.

scholarly journals Investigation of electrooptical breakdown threshold in gas mixtures of complex chemical composition

2015 ◽  
Vol 652 ◽  
pp. 012043 ◽  
Author(s):  
E Y Loktionov ◽  
N A Pasechnikov ◽  
A V Pavlov ◽  
Y S Protasov ◽  
V D Telekh
Keyword(s):  
Chemical Composition ◽  
Gas Mixtures ◽  
Breakdown Threshold ◽  
Complex Chemical ◽  
Complex Chemical Composition

scholarly journals Levantamento dos estudos realizados com a própolis produzida no estado da Bahia

2013 ◽  
Vol 13 ◽  
Author(s):  
Aline Silva Costa ◽  
Bruna Aparecida Souza Machado ◽  
Marcelo Andres Umsza-Guez ◽  
Marina Gonçalves Cirqueira ◽  
Silmar Baptista Nunes ◽  
...  
Keyword(s):  
Antimicrobial Activity ◽  
Chemical Composition ◽  
The State ◽  
Complex Chemical ◽  
Scientific Papers ◽  
Complex Chemical Composition ◽  
Almost All

Propolis is a product of varied consistency and colour, produced by bees from materials collected from various parts of the plants. It has a complex chemical composition, which depends on the regional flora. Therefore, there are various types of propolis, making comparison between them a difficult task. In the present study, a survey of studies with propolis from the state of Bahia, Brazil, was carried out. We identified 17 scientific papers and eight patents dealing with propolis produced in Bahia. In these works three amongst the 13 types of propolis reported in Brazil were listed. Almost all studies report the antimicrobial activity potential of propolis types 6, highlighting its low percentage of flavonoids. It was also noted that the incentive given to the production of propolis type 13 in Bahia, also known as “própolis vermelha”, is due to the overall aggregate value of this product.

scholarly journals Linalool and methyl chavicol present basil (Ocimum sp.) cultivated in Brazil

2013 ◽  
Vol 15 (2) ◽  
pp. 309-311 ◽  
Author(s):  
R.A. de Oliveira ◽  
I.S. Moreira ◽  
F.F. Oliveira
Keyword(s):  
Chemical Composition ◽  
Medicinal Plants ◽  
Essential Oils ◽  
Complex Chemical ◽  
Methyl Chavicol ◽  
Ocimum Species ◽  
Complex Chemical Composition

In Brazil, Ocimum species are commonly known as aromatic and restorative herbs. The present research aimed to study the chemical composition of the essential oils of fresh and dry basil (Ocimum sp) leaves obtained by hydrodistillation and analyzed by GC-FID and GC-MS. The obtained yield was 0.70% for dry leaves and 0.26% for fresh leaves. The major compounds were: linalool (29.50-32.26%) and methyl chavicol (36.81-41.62%). Eucalyptol could also be detected (9.99-7.68%). The oil from dry leaves presented a more complex chemical composition. This study serves to contribute to the knowledge of medicinal plants occurring in Brazil.

scholarly journals HPLC Analysis of Sugars in Different Types of Wine from Jidvei Winery

2011 ◽  
Vol 68 (2) ◽  
Author(s):  
Carmen Ioana CHIRCU ◽  
Sevastiţa MUSTE ◽  
Otilia BOBIS ◽  
Victorita BONTA
Keyword(s):  
Chemical Composition ◽  
Phenolic Compounds ◽  
Organic Acids ◽  
Hplc Analysis ◽  
Raw Material ◽  
Complex Chemical ◽  
Wine Making ◽  
Different Types ◽  
Complex Chemical Composition

Grapes, the raw material for wine making, have a complex chemical composition comprising of carbohydrates, organic acids and phenolic compounds, parameters that can be found in wine also, but in different concentrations.

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