scholarly journals Application of complex instrumental techniques, spectroscopy and chromatography, for the analysis of biofuels and biomass

2019 ◽  
Vol 9 (3) ◽  
pp. 53-59
Author(s):  
Tatjana Tomić ◽  
Jelena Parlov Vuković
Keyword(s):  
Alternative Fuels ◽  
Raw Materials ◽  
Chemical Properties ◽  
Hydrocarbon Composition ◽  
Spectroscopic Methods ◽  
Plant Raw Materials ◽  
Ecological Requirements ◽  
Physical Chemical ◽  
Different Types

Biofuels are environmentally friendly alternative fuels produced from animal and plant raw materials. They have great significance due to limited availability of crude oil and increased ecological requirements. The development of biofuels is followed by the development of new and more efficient analytical procedures for monitoring the composition and physical-chemical properties. This paper presents the application of chromatographic and spectroscopic methods in the analysis of different types of biofuels. The results of the determination of the hydrocarbon composition and functional groups important for the application of biofuels as blending components are shown. In this paper, it has confirmed the possibility of using NMR spectroscopy, HPLC and IC chromatography in biofuel and biomass analysis.

scholarly journals Isolation and determination of some physical and chemical properties of polysaccharide from black elderberry flowers

2020 ◽  
pp. 95-101
Author(s):  
Игорь Анатольевич Сычев ◽  
Татьяна Викторовна Алимкина
Keyword(s):  
Medicinal Plant ◽  
Quantitative Determination ◽  
Raw Materials ◽  
Chemical Properties ◽  
Physical And Chemical Properties ◽  
Plant Raw Materials ◽  
Physical And Chemical ◽  
And Chemical Properties

Предложенный метод количественного определения восстанавливающих моносахаридов в полисахариде позволяет проводить стандартизацию лекарственного растительного сырья цветков бузины черной. На способ стандартизации лекарственного растительного сырья цветков бузины черной по содержанию восстанавливающих моносахаридов в полисахариде оформлено рационализаторское предложение № 1373 от 29.02.2016 г. РязГМУ. The proposed method for the quantitative determination of reducing monosaccharides in a polysaccharide makes it possible to standardize medicinal plant raw materials of black elderberry flowers. On the method of standardization of medicinal plant raw materials of black elderberry flowers in terms of the content of reducing monosaccharides in the polysaccharide, a rationalization proposal No. 1373 dated February 29, 2016 RyazSMU was issued.

CAFFEINE ANALYSIS BY THIN-LAYER CHROMATOGRAPHY RELATED TO THE PHYSICAL-CHEMICAL PROPERTIES OF DIFFERENT VARIETIES OF COFFEE AND SURROGATES

2017 ◽  
Vol 31 (1) ◽  
pp. 69-73
Author(s):  
Cristina Mihali ◽  
◽  
Ionut Grad ◽  
Thomas Dippong ◽  
◽  
...  
Keyword(s):  
Thin Layer ◽  
Thin Layer Chromatography ◽  
Chemical Properties ◽  
Chemical Characteristics ◽  
Physical Chemical ◽  
Different Types ◽  
Decaffeinated Coffee ◽  
Layer Chromatography

The aim of this study was to evaluate the physical-chemical characteristics of different types of coffee, decaffeinated and of two types of coffee substitutes based on barley and chicory. The following physical-chemical characteristics were performed: moisture, pH, content of polyphenols and qualitatively determination of caffeine, by thin-layer chromatography. The moisture of the investigated coffee and substitutes of coffee was in the range 1,5 and 3,6%. By analyzing the moisture of the coffee substitutes, we observed that coffee based on barley has the highest moisture and chicory has the lowest value. The caffeine was qualitatively determined by thin-layer chromatography. It was found that all types of the investigated samples contain caffeine excepting decaffeinated coffee. Polyphenols content of the analysed coffee samples varied in the range of 2.8-3.2 mg/g.

Investigation of the Possibilities of Using Soybean Oil as an Ecological Additive to Petroleum Diesel Fuel

2022 ◽  
pp. 39-52
Author(s):  
S.N. Devyanin ◽  
V.A. Markov ◽  
A.G. Levshin ◽  
T.P. Kobozeva ◽  
V.A. Neverov
Keyword(s):  
Diesel Engine ◽  
Soybean Oil ◽  
Diesel Fuel ◽  
Alternative Fuels ◽  
Combustion Engine ◽  
Raw Materials ◽  
Experimental Studies ◽  
Chemical Properties ◽  
Promising Alternative ◽  
Plant Raw Materials

One of the most important areas of internal combustion engine improvement is its adaptation to work on alternative fuels. Motor fuels obtained from renewable plant raw materials are considered to be promising alternative fuels. The article considers the possibility of using soybean oil as an ecological additive in petroleum diesel fuel. The features of soybean oil production and the physico-chemical properties of soybean oil and a mixture containing 80 % (by volume) of petroleum diesel fuel and 20 % of soybean oil are researched. Computational studies of the processes of fuel atomization and mixture formation in the D-245 diesel engine operating on mixtures of petroleum diesel fuel and seed oil have been performed. Experimental studies of the D-245 diesel engine operating on petroleum diesel fuel and the specified blended fuel have been carried out. Conversion of a diesel engine from petroleum fuel to mixed one leads to a decrease in integral emissions per test cycle: nitrogen oxides by 19.1 %, carbon monoxide — by 10.5 %, unburned hydrocarbons - by 8.9 %.

scholarly journals Born out of Fire and Ice: Polymorph Studies of the Antiviral Famciclovir

Crystals ◽  
2021 ◽  
Vol 11 (2) ◽  
pp. 129
Author(s):  
Liana Vella-Zarb ◽  
Ulrich Baisch
Keyword(s):  
Variable Temperature ◽  
Chemical Properties ◽  
Crystal Form ◽  
X Ray Diffraction ◽  
Crystal Forms ◽  
X Ray ◽  
Physical Chemical ◽  
Diffraction Patterns ◽  
Crystalline Forms

There is much interest and focus on solid forms of famciclovir. However, in spite of the abundance of reported differences in oral bioavailability, compressibility, and other physical–chemical properties of the various crystal forms of this drug, very little precise structural analysis is available in the literature to date. The form used in the commercial formulation is the anhydrous form I. Patents and patent applications report three different anhydrous crystalline forms on the basis of unindexed powder diffraction patterns. Single-crystal and variable-temperature X-ray diffraction experiments using the commercially available anhydrous form of famciclovir were carried out and led not only to the crystal structure determination of the anhydrous form I, but also to discovery of a new crystal form of anhydrous famciclovir from powder data.

scholarly journals Comparative pharmakognostical study of roots of Rosa Majalis Herrm. and Rosa Canina L.

2021 ◽  
pp. 71-78
Author(s):  
Tetiana Oproshanska ◽  
Olga Khvorost ◽  
Kateryna Skrebtsova ◽  
Konradas Vitkevicius
Keyword(s):  
Cell Walls ◽  
Raw Materials ◽  
Total Polyphenols ◽  
Diagnostic Features ◽  
Rosa Canina ◽  
Plant Raw Materials ◽  
Quantitative Content ◽  
Microscopic Features ◽  
Boundary Limits

The aim is to conduct a comparative pharmacognostical study of the series of roots of Rosa (R.) majalis Herrm. and Rosa (R.) canina L. with the establishment of diagnostic features of morphological and anatomical structure and boundary limits of numerical indicators of raw materials. Materials and methods. The fresh and dry raw materials were used to study the macroscopic microscopic features by microscope Delta optical BioLight 300 (Poland). Determination of total polyphenols was performed by spectrophotometry (on a spectrophotometer Optizen POP (Korea)) and HPLC (chromatograph an Agilent 1200 3 D LC System Technologies (USA)). Results. The morphological (nature of the surface (periderm) and fracture) and anatomical (color of cell walls and their cavities; location of the sclerenchyma; the presence of a crystalline coating of the sclerenchyma at the root of R. canina; of various elements of the remains of the tetraarchic conducting bundle in the center of the root) diagnostical features of roots of R. majalis and R. Canina were established. Comparing the numerical values of loss on drying (not more than 10 %), total ash (not more than 5 %), extractable matter (not less than 9 %) and the quantitative content of total polyphenols (not less than 4 %) it was determined that both types of raw materials according to these indicators are almost indistinguishable. Conclusions. Loss on drying, total ash, extractable matter and content of total polyphenols of the root of R. majalis and R. canina do not have significant differences, that is why the root of both plant species can be used as medicinal plant raw materials such as “Rose root”. The obtained data will be used in further research when creating methods of quality control of plant raw materials and phytomedicines

scholarly journals DEvELopMENT of TEOHNiQuEs FoR THE DETERMiNATioN oF MoisTuRE (Loss oN DRYING) oF MEDiOiNAL PLANT RAW MATERiALS oF MoRPHoLoGiOAL group “FRUiT” by infrared thermogravimetric method

2019 ◽  
Vol 19 (1-2) ◽  
pp. 13-18
Author(s):  
D. A Zhdanov ◽  
V. B Braslavsky
Keyword(s):  
Medicinal Plant ◽  
Russian Federation ◽  
Raw Materials ◽  
The State ◽  
Moisture Loss ◽  
Anethum Graveolens ◽  
Thermogravimetric Method ◽  
Plant Raw Materials ◽  
The Russian Federation

The article is devoted to the development of new and perspective for the State Pharmacopoeia of the Russian Federation (SP RF) techniques for determining of the moisture (loss on drying) of medicinal plant raw materials of the morphological group “Fruit” and medicinal plant preparations by the use of infrared thermogravimetric (IRTGM) method. The techniques for determination of moisture (loss on drying) IRTGM-method as exemplified by the fruit of the following medicinal plants: Silybum marianum (L.) Gaertn., Rosa cinnamomea L. and Anethum graveolens L. were developed. The comparable results for determining of the moisture (loss on drying) of the medicinal plant raw materials of investigated plants were obtained by means of two methods: IRTGM and pharmacopoeial method, which allow us to recommend the developed techniques for inclusion into the relevant monographs of the State Pharmacopoeia of the Russian Federation.

The issue of "oil shrinkage" during the compounding of oils in the processes of production, collection, preparation and transportation of hydrocarbon raw materials

2021 ◽  
pp. 104-113
Author(s):  
O. P. Deryugina ◽  
E. A. Trapeznikov
Keyword(s):  
Raw Materials ◽  
Raw Material ◽  
Colloidal System ◽  
Main Pipelines ◽  
Different Types ◽  
Preliminary Study ◽  
The Stability ◽  
Mixed Oil

The article discusses the issue of industrial compounding, which improves the quality of the raw materials supplied to the main pipelines. Compounding from "to compound" (English) - to mix. When mixing different types of oil obtained, "incompatibility" is possible, which is expressed in the precipitation of a solid sediment and violation of the stability of the colloidal system and due to the differing properties of oils. Attention to this problem is due to the tightening of requirements for the quality of raw materials that must comply with modern standards. The article discusses the causes of the problem of "incompatibility" of oil during compounding and effective ways of solving it, substantiates the need for a preliminary study of the properties of mixed oil in order to identify possible incompatibility of various types of oil. The standard tests for determination of incompatibility indices characterizing the ability of raw materials to mix are considered. The article substantiates the need to develop methods for diagnosing the incompatibility of oils as the most important task of modern chemical science, the solution of which will improve the quality of the raw material obtained and solve many technological problems in the compounding process.

scholarly journals Technology of functional bread using sorghum flour

2020 ◽  
Vol 17 ◽  
pp. 00196
Author(s):  
Olga Temnikova ◽  
Elena Rudenko ◽  
Galina Mukovnina ◽  
Anna Ruzyanova
Keyword(s):  
Mathematical Modeling ◽  
Daily Intake ◽  
Chemical Properties ◽  
Optimal Dosage ◽  
Sorghum Flour ◽  
Physical Chemical ◽  
Functional Bread

The production of functional bread is considered in this paper. It is suggested to make bread using mix of wheat and sorghum flour. Mathematical modeling of experiment in order to calculate the optimal dosage of sorghum flour in the recipe was carried out. It was established that introduction of sorghum flour allows decreasing the amount of sugar in the recipes. The determination of physical-chemical properties of bread samples was conducted. Acidity, wet content and porosity of bread samples were determined. Obtained bread can be classified as functional because the portion of the bread contains more than 15 % of magnesium, manganese and silicon daily intake.

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