scholarly journals Spling of slots in chaff as an effect of using mixtures with a regulated composite related basis in the bathroom in gas structures

2018 ◽  
pp. 50-56
Author(s):  
V Kamkin ◽  
S Tokarev ◽  
A Mishalkin ◽  
R Ankudinov ◽  
O Bezshkurenko
Keyword(s):  
Carbon Content ◽  
Disperse Material ◽  
Chemical Properties ◽  
Component Composition ◽  
Extraction Process ◽  
Slag Formation ◽  
Physical And Chemical Properties ◽  
Natural Minerals ◽  
Physical And Chemical ◽  
And Chemical Properties

The purpose of the work is to select a rational mode of slag formation in oxygen converters and chipboard. It should be based on the study of the influence of the chemical and component composition on the physical and chemical properties of slag, which determine its refining capacity. The physicochemical substantiation of the rational component and chemical composition of fluxes for the formation of a slag phase with given physical and chemical properties during the smelting of electric steel is given. It has been shown that when reducing the oxidation intensity of carbon in a metal melt and in the conditions of the extraction process for the formation of a stable gas-slag foam, the use of complex slag-forming mixtures containing natural minerals and man-made wastes on the basis of carbon and iron oxides is used. Increasing the efficiency of applying slag-forming mixtures with an adjustable CaO: CaCO3: C: FexOy ratio is achieved by implementing a method for introducing a disperse material into a carrier gas stream with an oxidizing potential, depending on the carbon content in the metal. It is established that the most rational for conditions of oxygen-converter melting is the use of materials intended for use, which contain lime with cigarette butter 15 - 20%. The material is fed to the bath at the end of the oxidation period with a decrease in carbon content to 0.15-0.2% with a significant increase in the temperature of the liquid steel. For conditions of steel smelting in the chipboard, the cigarette can be 40 60%.

Extraction of Essential Oil from Sedap malam Flower (Polianthes tuberosa) Using Methanol Solvent

2021 ◽  
Vol 872 ◽  
pp. 67-71
Author(s):  
Suharno Rusdi ◽  
Farida Imtiyaz ◽  
Nopia Denvil Wulandari ◽  
Achmad Chafidz
Keyword(s):  
Essential Oil ◽  
Chemical Properties ◽  
Extraction Process ◽  
Physical And Chemical Properties ◽  
Simple Distillation ◽  
Infra Red ◽  
Ft Ir ◽  
Ir Analysis ◽  
Physical And Chemical ◽  
And Chemical Properties

The objectives of this study are to obtain essential oil from Sedap Malam (Tuberose) flower via extraction method and to characterize the physical and chemical properties of the essential oil produced, such as density, rendement, and chemical composition. The extraction process was carried out by using methanol solvent. The ratio between Sedap Malam flower and the methanol solvent was 1:5. After the extraction process of the essential oil finished, the essential oil and the solvent were separated via a simple distillation process. The collected essential oil was then characterized using Gas Chromatography-Mass Spectrophotometry (GC-MS) apparatus and Fourier Transform Infra-Red (FT-IR) analysis to investigate the content of the essential oil extracted from Sedap Malam flower. The physical characterization results showed that the essential oil has average rendement value of 12.605 % and density value of 1.0905 g/mL. Additionally, organoleptic test was carried to test the response of respondents toward the color and odor/fragrance of the essential oil extracted from Sedap Malam flower. Most of the responses were included in categories of “Like” and “Really like”. Additionally, for the fragrance, most of response of the respondents for all the four samples of essential oil were in category of “Really like”.

scholarly journals Characteristics of Sodium Alginate Extracted from Turbinaria sp. and Sargassum sp.

2018 ◽  
Vol 13 (2) ◽  
pp. 79 ◽  
Author(s):  
Rinta Kusumawati ◽  
Jamal Basmal ◽  
Bagus Sediadi Bandol Utomo
Keyword(s):  
Water Content ◽  
Sodium Alginate ◽  
Raw Materials ◽  
Chemical Properties ◽  
Brown Seaweed ◽  
Extraction Process ◽  
Physical And Chemical Properties ◽  
Physical And Chemical ◽  
And Chemical Properties

Characterization of sodium alginate extracted from two species of brown seaweed (Turbinaria sp. and Sargassum sp.) has been conducted. The aim of the study was to evaluate physical and chemical properties of the two different types of sodium alginates produced from this extraction process. Extraction was conducted in alkaline solution followed by acid treatment with the following steps: sortation of seaweed, washing, alkaline extraction, bleaching, alginic acid and sodium alginate conversion, dehydration using isopropyl alcohol (IPA), drying, chopping and grinding. Each extraction was conducted in duplicate using approximately 1 kg of the raw materials. The physical and chemical properties of the final products (sodium alginate powders) were analyzed. The results of the analysis were as follows: the yield of alginate powder from Turbinaria sp. was 14.77% having water content of 13.48%; whiteness degree of 23.77%; and viscosity of 133.67 cPs while the yield of sodium alginate powder extracted from Sargassum sp. was 24.56% with water content of 12.69%; whiteness degree of 43.80%; and viscosity of 217.50 cPs. Both alginate powders had better physical characteristics compared to commercial grade alginate which had water content of 16.07%, whiteness degree of 29.37%, and viscosity of 102.67cPs.

Statistical criteria of stellar population types

1966 ◽  
Vol 24 ◽  
pp. 101-110
Author(s):  
W. Iwanowska
Keyword(s):  
Stellar Population ◽  
Chemical Properties ◽  
Spectrophotometric Study ◽  
Physical And Chemical Properties ◽  
Population Type ◽  
The Galaxy ◽  
Distribution Parameters ◽  
Physical And Chemical ◽  
Statistical Criteria ◽  
And Chemical Properties

In connection with the spectrophotometric study of population-type characteristics of various kinds of stars, a statistical analysis of kinematical and distribution parameters of the same stars is performed at the Toruń Observatory. This has a twofold purpose: first, to provide a practical guide in selecting stars for observing programmes, second, to contribute to the understanding of relations existing between the physical and chemical properties of stars and their kinematics and distribution in the Galaxy.

Response of corn (Zea mays L.) to various organic-based fertilizers in marginal upland of Sta. Rita, Samar

2017 ◽  
pp. 31-43
Author(s):  
Berta Ratilla ◽  
Loreme Cagande ◽  
Othello Capuno
Keyword(s):  
Block Design ◽  
Management Strategies ◽  
Chemical Properties ◽  
Organic Fertilizers ◽  
Growth And Yield ◽  
Physical And Chemical Properties ◽  
Total N ◽  
Randomized Complete Block Design ◽  
Physical And Chemical ◽  
And Chemical Properties

Organic farming is one of the management strategies that improve productivity of marginal uplands. The study aimed to: (1) evaluate effects of various organic-based fertilizers on the growth and yield of corn; (2) determine the appropriate combination for optimum yield; and (3) assess changes on the soil physical and chemical properties. Experiment was laid out in Randomized Complete Block Design, with 3 replications and 7 treatments, namely; T0=(0-0-0); T1=1t ha-1 Evans + 45-30-30kg N, P2O5, K2O ha-1; T2=t ha-1 Wellgrow + 45-30-30kg N, P2O5, K2O ha-1; T3=15t ha-1 chicken dung; T4=10t ha-1 chicken dung + 45-30-30kg N, P2O5, K2O ha-1; T5=15t ha-1 Vermicast; and T6=10t ha-1 Vermicast + 45-30-30kg N, P2O5, K2O ha-1. Application of organic-based fertilizers with or without inorganic fertilizers promoted growth of corn than the control. But due to high infestation of corn silk beetle(Monolepta bifasciata Horns), its grain yield was greatly affected. In the second cropping, except for Evans, any of these fertilizers applied alone or combined with 45-30-30kg N, P2O5, K2O ha-1 appeared appropriate in increasing corn earyield. Soil physical and chemical properties changed with addition of organic fertilizers. While bulk density decreased irrespective of treatments, pH, total N, available P and exchangeable K generally increased more with chicken dung application.

Sign in / Sign up

Export Citation Format

Share Document