Chemical Characteristics and Immuno-Stimulatory Activity of Polysaccharides from Fermented Vinegars Manufactured with Different Raw Materials

2015 ◽  
Vol 44 (2) ◽  
pp. 191-199 ◽  
Author(s):  
Dong-Su Kim ◽  
Byung Serk Hurh ◽  
Kwang-Soon Shin
Keyword(s):  
Raw Materials ◽  
Chemical Characteristics ◽  
Stimulatory Activity

Fabrication and Properties of Panicum repens Reinforced Cement

2018 ◽  
Vol 879 ◽  
pp. 161-165
Author(s):  
Varinthorn Boonyaroj ◽  
Sirichai Saramanus
Keyword(s):  
Compressive Strength ◽  
Raw Materials ◽  
Chemical Characteristics ◽  
Sodium Hydroxide Concentration ◽  
X Ray ◽  
Optimal Ratio ◽  
Panicum Repens ◽  
Reinforced Cement ◽  
Materials Used ◽  
Scanning Electron

This research aims to fabrication and evaluation the properties of cement reinforcement made from Panicumrepens. The research is divided into two parts are as follows; to determined the optimal ratio selection, and to compare the properties of Panicumrepens reinforced cement, and without grasses by using the optimal ratio. The raw materials used in this research were cut in length of 2.0-2.5 cm. In this research was determined the properties of Panicumrepens reinforced cement in terms of bulk density, water absorption, and compressive strength. The influence of fibers soaked with 5% of sodium hydroxide concentration was also conducted in this research. The surface structure and chemical characteristics of fibers used to produce reinforced cement were observed by using scanning electron microscope (SEM), and energy dispersive x-ray spectrometer (EDS), respectively. Moreover, relationships of information collected from this research were concerned. Furthermore, the addition of Panicumrepens fibers could improve the flexural strength of composite materials.

Synthesis and Structure Determination of Carbonized Nano Mesoporous Materials Based on Vegetable Raw Materials

2012 ◽  
Vol 535-537 ◽  
pp. 1041-1045 ◽  
Author(s):  
Seitkhan Azat ◽  
Valodia V. Pavlenko ◽  
Almagul R. Kerimkulova ◽  
Zulkhair A. Mansurov
Keyword(s):  
Mesoporous Materials ◽  
Structure Determination ◽  
Carbon Nanomaterials ◽  
Raw Materials ◽  
Agricultural Products ◽  
Chemical Characteristics ◽  
Physico Chemical ◽  
Vegetable Raw Materials ◽  
Waste Agricultural Products

This article presents the results of the synthesis of carbon nanomaterials: Nanoscale materials obtained by carbonization of waste agricultural products (apricot kernel, walnut, rice husk). The results of physico-chemical characteristics of the obtained nanomaterials.

scholarly journals CHEMICAL-MINERАLOGICAL CHARACTERIZATION OF BAUXITES FROM DIFFERENT DEPOSITS

2014 ◽  
Vol 5 (1) ◽  
Author(s):  
Gordana Оstojić ◽  
Dragica Lazić ◽  
Branko Škundrić ◽  
Jelena Penavin Škundrić ◽  
Slavica Sladojević ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Thermal Analysis ◽  
Raw Materials ◽  
Mineralogical Composition ◽  
Chemical Characteristics ◽  
X Ray Diffraction ◽  
X Ray ◽  
Scanning Electron

From the aspect of their chemical and mineralogical composition, bauxites are very complex multicomponent raw materials. The paper presents the characterization of bauxite from several different deposits: Brazil, Milići, Čitluk and Kosovo. Chemical characteristics were determined by a combination of different analytical methods: gravimetry, potentiometric titration, atomic absorption spectroscopy (AAS) and UV-VIS spectrophotometry. Mineralogical composition was determined using X-ray diffraction and thermal analysis methods. Chemical and structural characterization is complemented by the results of scanning electron microscopy with EDX analysis. The information obtained was used for the assessment of the quality of investigated bauxites from the aspect of their application in the production of alumina.

scholarly journals Manifestations and causes of meromixis in lakes resulting from mineral extraction in Czechia

Geografie ◽  
2010 ◽  
Vol 115 (1) ◽  
pp. 96-112 ◽  
Author(s):  
Tomáš Hrdinka ◽  
Miroslav Šobr
Keyword(s):  
Water Surface ◽  
Raw Materials ◽  
Raw Material ◽  
Chemical Characteristics ◽  
Specific Character ◽  
Mineral Extraction ◽  
Physical Chemical ◽  
Morphometric Feature ◽  
Physical And Chemical ◽  
Qualitative Characteristics

Anthropogenic lakes (lakes that have developed in mined-out pits as a consequence of mineral raw material mining) exhibit many interesting phenomena. Specific water features are the most remarkable, including physical, chemical and the biological characteristics. Other very specific morphometric feature of anthropogenic lake basins include the unusual location of the lake’s water surface: often several dozen meters below the adjacent terrain and the specific character of the mined-out raw materials. All of these factors affect the qualitative characteristics of lake’s water, even decades after flooding. The interaction of the factors mentioned above has resulted in the creation of a permanent meromixis in some anthropogenic lakes. The author’s primary objectives are to present some physical and chemical symptoms of meromixis at selected localities, to discuss the mutual interaction between the physical and chemical characteristics of lake water and to explore some probable causes of the origin of meromixis at the selected localities.

scholarly journals Investigation of the Physical and Chemical Characteristics of the Zeolites of the Kholinsky Deposit

2021 ◽  
Vol 10 (4) ◽  
pp. 65-71
Author(s):  
A. V. Bondarev ◽  
E. T. Zhilyakova ◽  
N. B. Demina ◽  
K. K. Razmakhnin
Keyword(s):  
Specific Surface ◽  
Surface Area ◽  
Raw Materials ◽  
Molecular Model ◽  
Three Dimensional ◽  
Chemical Characteristics ◽  
Structural Level ◽  
Mineral Raw Materials ◽  
Physical And Chemical ◽  
Sorption Characteristics

Introduction. The mineral resource base of Russia has effective sorption substances that meet pharmaceutical requirements. Promising mineral raw materials are Zeolites, which combine the properties of an adsorbent and a "molecular sieve" due to the porous structure. In addition to the enterosorption direction, natural Zeolites are a source of macro-and microelements, which determines their use as biologically active food additives.Aim. Study of the physical and chemical characteristics of the Zeolites of the Kholinsky deposit.Materials and methods. The zeolite mineral raw materials of the Kholinsky deposit were used as objects of research. Optical microscopy was performed using a Leica DM direct microscope (Microsystems, Germany). Energy dispersion analysis was performed using an electron scanning microscope JSM-5300 (Jeol Ltd, Japan). The sorption characteristics were studied using the ASAP 2400 device (Micromeritics, USA) according to the method. The construction of a virtual three-dimensional molecular model of the Zeolite was carried out using the program Java Applet Jmol.Results and discussion. The physicochemical properties of Zeolites are investigated. It is established that morphologically the particles of the zeolite phase have a size of 5-30 microns, they are evenly distributed over the entire area of the site and represent the first structural level. Particles of the zeolite phase with a size of 5-6 microns form the second structural level due to Clinoptilolite crystals, microcracks and microgeodes. Based on the energy-dispersion spectral analysis, an increased content of the elements K, Na was revealed, which indicates the alkaline composition of the cation exchange complex. The studied Zeolite samples have micropores (volume 0.0031 cm3/g), mesopores (volume 0.0675 cm3/g), and a specific surface area of 29.1840 m2/g. A virtual three-dimensional molecular model of the Zeolite of the Kholinsky deposit has been developed. According to the molecular model, the sorption characteristics of the Kholinsky deposit Zeolite were: specific surface area - 1096.31 m2/g (1916.34 m2/cm3), the average diameter of the spherical molecule for adsorption in the pores is 5.97 A.Conclusion. The analysis of the sorption characteristics of the Zeolite revealed the following features: the pores occupy half the volume of the entire Zeolite, which are available for the sorption of water and low-molecular substances. Each pore in three mutually perpendicular directions communicates with the neighboring ones through "windows". A system of intracrystalline pores and cavities is formed, in which the occlusion and adsorption of molecules of the appropriate size easily occurs.

Anatomical and chemical characteristics of leaves and branches of Juniperus deppeana var. deppeana (Cupressaceae): A potential source of raw materials for the perfume and sweet candies industries

2018 ◽  
Vol 113 ◽  
pp. 50-54 ◽  
Author(s):  
Maite Lascurain Rangel ◽  
José A. Guerrero-Analco ◽  
Juan L. Monribot-Villanueva ◽  
Ana L. Kiel-Martínez ◽  
Sergio Avendaño-Reyes ◽  
...  
Keyword(s):  
Raw Materials ◽  
Chemical Characteristics ◽  
Potential Source

scholarly journals SEMI-INDUSTRIAL TECHNOLOGY FOR SYNTHESIS OF TETRACYANOETHYLENE

2020 ◽  
Vol 63 (6) ◽  
pp. 72-79
Author(s):  
Konstantin V. Lipin ◽  
Sergey V. Fedoseev
Keyword(s):  
Carbon Disulfide ◽  
Raw Materials ◽  
Synthesis Method ◽  
Sodium Cyanide ◽  
Reaction Mass ◽  
Technological Scheme ◽  
Chemical Characteristics ◽  
Auxiliary Equipment ◽  
Physico Chemical ◽  
Selection Of

The goal of our work is to develop a synthesis of tetracyanoethylene suitable for scaling and to design a technological scheme of the process based on it. To achieve this goal, a tetracyanoethylene synthesis method was originally developed, which consists of the following stages: obtaining sodium cyanodithioformate based on carbon disulfide and sodium cyanide using N, N-dimethylformamide as a solvent; obtaining tetracyano-1,4-dithiine by treating sodium cyanodithioformate with chlorine; obtaining tetracyanoethylene from tetracyano-1,4-dithiine by sequential interaction with sodium cyanide and chlorine. The developed method was tested in the laboratory, where it showed its suitability. Therefore, further on the base of this method, a technological scheme of the process was designed. A description of the scheme and the necessary sequence of operations are compiled. The interaction takes place in the reactors R-1, R-2, R-3. Pumps N-1–4 provided the pumping the reaction mass. Also, in the technological scheme there is an F-1 Nutsche filter for separation of the suspension. To isolate and purify the obtained tetracyanoethylene, an I-1 vacuum evaporator and a SA-1 sublimation apparatus are used. The necessary equipment was selected for the technological scheme: Р-1 reactor made of Teflon with a volume of 200 l with a stirrer and a jacket; two reactors Р-2 and Р-3 made of glass with a volume of 200 l with a stirrer and a jacket; Ф-1 Nutsche filter made of thick-walled polypropylene pipes; sublimation apparatus CA-1 continuous. The selection of the main and auxiliary equipment was carried out on the base of the chemical and physico-chemical characteristics of the reagents, technological conditions and the characteristics of the process. This method of obtaining compares favorably with the use of simple and cheap raw materials common in the chemical industry and the use of standard processing equipment.

scholarly journals Physico-chemical Characteristics and Utilization of Raw Materials for Mushroom Substrates

2010 ◽  
Vol 38 (2) ◽  
pp. 136-141 ◽  
Author(s):  
Jong-Chun Cheong ◽  
Chang-Sung Jhune ◽  
Chan-Jung Lee ◽  
Jin-A Oh
Keyword(s):  
Raw Materials ◽  
Chemical Characteristics ◽  
Physico Chemical ◽  
Characteristics And Utilization

scholarly journals Karakalpakstan Bentonite Clays - Perspective Raw Materials for Obtaining Ceramic Heat-Insulating Materials

2020 ◽  
Vol 9 (8) ◽  
pp. 417-420
Keyword(s):  
Raw Materials ◽  
Bentonite Clay ◽  
Chemical Characteristics ◽  
Insulating Materials ◽  
The North ◽  
Physico Chemical ◽  
Bentonite Clays ◽  
Comprehensive Study

The article presents the results of a comprehensive study of bentonite clays of the North Jamansay deposit of Karakalpakstan for the production of ceramic heat-insulating materials. The possibility of using this bentonite clay as a result of studying their chemical and mineralogical, fractional compositions and physico-chemical characteristics for ceramic heat-insulating materials for various purposes has been established.

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