scholarly journals DEVELOPMENT OF RESOURCE-SAVING TECHNOLOGIES FOR OBTAINING COMPOSITE MATERIALS BASED ON THE USE OF OILSEED FLAX FIBERS

2021 ◽  
pp. 275-282
Author(s):  
Olga Gorach ◽  
Olena Dombrovska ◽  
Anastasiia Tikhosova
Keyword(s):  
Composite Materials ◽  
Chemical Composition ◽  
Raw Materials ◽  
Scientific Basis ◽  
Resource Saving ◽  
Flax Fibers ◽  
Scientific Substantiation ◽  
And Performance ◽  
Flax Straw

The article examines the ways to solve the problem of developing a scientific basis for obtaining composite materials of different functional purposes from oilseed flax fibers. The paper covers theoretical and experimental research in the area of processing flax raw materials. The purpose of the study is to provide scientific substantiation of developing the technologies for obtaining fillers to reinforce composite materials. In order to do it, we performed modification of oilseed flax fiber and developed technologies for processing oilseed flax straw with regulated technological and performance characteristics. The article also presents the results of the research on determining causes of low wettability of oilseed flax bast. In order to find out the causes of low bast wettability, we conducted research on examining chemical composition and anatomy of straw stems. The formulation for preparing the fiber aimed to be used as a filler for reinforcement of composite materials is offered. The study suggests evaluation of the quality of composite materials produced on the basis of using modified oilseed flax fibers.

IMPACT OF INNOVATIVE METHOD OF PREPARING TOBACCO LEAVES FOR DRYING ON THE BASIC PARAMETERS OF QUALITY OF TOBACCO RAW MATERIAL

2019 ◽  
Author(s):  
Е.Е. Ульянченко
Keyword(s):  
Chemical Composition ◽  
Quality Indicators ◽  
Raw Materials ◽  
Raw Material ◽  
Tobacco Leaves ◽  
Commercial Grade ◽  
Innovative Method ◽  
Main Indicator ◽  
Basic Parameters

Исследовано влияние приема прорезания средней жилки на основные качественные показатели табачного сырья. Исследования проводили на листьях основных сортотипов табака Трапезонд и Остролист по массовым ломкам. Прорезание жилки осуществляли на инновационном оборудовании экспериментальном образце линии подготовки листьев табака к сушке ЛПТС360 (ВНИИТТИ, Краснодар). Качество табачного сырья с прорезанной жилкой определяли по товарным сортам, технологическим и курительным свойствам, химическому составу по методикам лабораторного контроля ВНИИТТИ. Инновационный способ подготовки табака к сушке в едином потоке с применением технологического оборудования, включающего прорезатель, выявил положительный технологический результат. Установлена эффективность приема прорезания средней жилки: срок естественной сушки листьев с прорезанной жилкой сократился в 2,5 раза выход 1го товарного сорта сырья составил 74,60 87,93 выход волокна сырья с прорезанной жилкой превышает минимальное значение технологических норм (75) в 1,15 1,26 раз условный расход сырья на единицу курительных изделий меньше норматива на 6 25 улучшен основной показатель химического состава табачного сырья (число Шмука) в 1,6 4,6 раза у сортотипа Трапезонд, в 1,2 1,5 раза у сортотипа Остролист дегустационные свойства сырья не ухудшились. Инновационный способ подготовки листьев табака к сушке, включающий прием прорезания средней жилки, рекомендуется для применения в производстве табачного сырья. The influence of middle vein cutting method on the main quality indicators of tobacco raw materials is studied. Studies were carried out on the leaves of the main varieties of tobacco Trapezond and Ostrolist, on mass breakdowns. Vein cutting was carried out on the innovative equipment of the line of preparation of tobacco leaves for drying LPTS360 (GNU VNIITTI RAA, Krasnodar). The quality of tobacco raw materials with a cut vein was determined by commercial grades, technological and Smoking properties, chemical composition in accordance with the methods VNIITTI. An innovative method of preparing tobacco for drying in a single stream with the use of technological equipment, including a cutter, revealed a positive technological result. The period of natural drying of leaves with cut veins decreased by 2,5 times. The yield of the 1st commercial grade of raw materials was 74,60 87,93. The output of the fiber raw material with cut vein exceeds the minimum value of technological norms (75) in 1,15 1,26 times. Conditional consumption of raw materials per unit of Smoking products is less than the norm by 6 25. The method of cutting the middle vein of the leaves improves the main indicator in the chemical composition of tobacco raw materials (Schmuck ratio) 1,6 4,6 times in the variety Trapezond and 1,2 1,5 times in the variety Ostrolist. The tasting properties of raw materials have not deteriorated. Analysis of raw material quality indicators showed that the innovative method of cutting the middle vein is effective and recommended for use in the production of tobacco raw materials.

Influence of Gypsum Additive on the Formation of Tobermorite in Autoclaved Aerated Concrete

2016 ◽  
Vol 714 ◽  
pp. 116-121 ◽  
Author(s):  
Ester Helanova ◽  
Rostislav Drochytka ◽  
Vit Cerný
Keyword(s):  
Chemical Composition ◽  
Hydrothermal Reaction ◽  
Raw Materials ◽  
Fly Ashes ◽  
Sem Images ◽  
X Ray ◽  
Autoclaved Aerated Concrete ◽  
Variable Chemical ◽  
Aerated Concrete

The quality of the aerated concrete strongly depends on the chemical composition of the raw materials, as well as the process of the hydrothermal reaction during autoclaving. Due to the variable chemical composition of fly ashes, it is necessary to identify the effect of each ion on the formation of the microstructure of aerated concrete. This paper examines the process of formation of tobermorite with the addition of sulphates in various percentage representation. The microstructure of aerated concrete is assessed using SEM images and the mineralogical by means of X-ray analysis.

scholarly journals Determination of the comprehensive indicator of pastille with the use of multi-component fruit-berry paste

2021 ◽  
Vol 3 (3(59)) ◽  
pp. 46-49
Author(s):  
Kateryna Kasabova ◽  
Nataliа Shmatchenko ◽  
Aleksey Zagorulko ◽  
Andreii Zahorulko
Keyword(s):  
Ascorbic Acid ◽  
Chemical Composition ◽  
Raw Materials ◽  
Control Sample ◽  
Comprehensive Assessment ◽  
Biologically Active ◽  
Human Need ◽  
Pectin Substances

The object of research in this work is the technology of pastille with the addition of multicomponent fruit and berry paste. Pastille are becoming more and more popular in the world for all segments of the population. Usually, the main ingredients for their manufacture are fruit raw materials, a structurant and egg white, therefore, the products contain practically no fat and have a low calorie content. It is proposed to replace 75 % of traditional applesauce in the recipe with a multicomponent fruit and berry paste made from apples, cranberries, hawthorn. It was found that such a composition makes it possible to obtain products with an increased content of pectin substances, ascorbic acid, polyphenols, including anthocyanins, catechins and flavonols. The work is aimed at studying the application of the principles of qualimetry to determine a complex indicator of the quality of pastille For this, the organoleptic and physicochemical indicators of the quality of the developed pastille were taken from previous studies and the chemical composition was determined and the content of biologically active substances was calculated relative to the average daily human need. The content of pectin substances in new products increases 1.7 times and satisfies the average daily human need by 18.2 %. The content of ascorbic acid is 4.2 times higher, which is 20.5 % of the average daily human need, and polyphenols 3.2 times higher – 579.0 %. The data obtained make it possible to consider the developed product functional. The next step was to determine the complex indicator of products by the qualimetric method. For a more complete disclosure of product properties, a structure of pastille quality indicators has been developed – a «tree of properties». Thus, the comprehensive assessment of the quality of the control sample corresponds to the indicator «good» (0.66), while the integrated assessment of pastille with multicomponent paste corresponds to the indicator «very good» (0.98). On the basis of organoleptic, physicochemical indicators and chemical composition of products, it was established that the indicator of a comprehensive assessment of the quality of a pastille with a multicomponent paste, taking into account all group indicators, is 48 % higher compared to the control.

scholarly journals MODIFICATION OF THE METHOD FOR DETERMINING THE WETTABILITY OF CELLULOSE FIBROUS RAW MATERIALS FOR POLYMER COMPOSITE MATERIALS

2021 ◽  
pp. 111-117
Author(s):  
Д.В. Чащилов ◽  
А.А. Генина
Keyword(s):  
Composite Materials ◽  
Polymer Composite ◽  
Raw Materials ◽  
Standard Procedure ◽  
Polymer Composite Materials ◽  
Test Material ◽  
Plant Fibers ◽  
Modified Method ◽  
Cellulose Materials

Для полимерных композиционных материалов (ПКМ) с армирующим наполнителем из натуральных волокон одними из проблем являются оценка качества подготовки волокон и определение динамики взаимодействия волокон и полимерной матрицы. Актуальность проблем обусловлена расширяющимся объёмом исследований ПКМ с растительными волокнами и разнообразными видами и глубиной предварительной обработки растительных волокон. Предметом исследования выступил стандартный метод определения смачиваемости целлюлозных материалов. Цель экспериментального исследования – предложить модифицированный метод определения смачиваемости, потенциально пригодный для оценки качества подготовки армирующих наполнителей ПКМ из растительных волокон. Использован стандартный по ГОСТ и модифицированный метод определения смачиваемости. В качестве пробного материала использовали целлюлозу древесную, полубелёную сульфитную из хвойной древесины в форме целлюлозной папки. Образцы целлюлозы механически разрыхляли до элементарных волокон и испытывали на смачиваемость. Использовали три схемы испытаний – взвешивание стаканчика с навеской, погруженного в воду (схема 1), взвешивание сосуда с водой (схема 2), стандартную методику по ГОСТ (схема 3). По схемам 1 и 2 измерения проводили в течение до 120 секунд, по схеме 3 – 30 секунд. Эксперименты проводили в трёхкратной повторности. Сущность модифицированного метода определения смачиваемости основана на постоянном контроле массы навески по мере сорбции водной влаги. Полученные закономерности кинетики процесса показали, что количество водной влаги, впитываемой образцами, нелинейно меняется во времени. Величины смачиваемости, определённых по различным схемам, с учётом отклонений, соответствуют друг другу. Определение смачиваемости по модифицированному методу предложено проводить в течение 120 секунд, периодически контролируя показания весов. Предложенный модифицированный метод может быть использован в исследовательских целях для изучения динамики впитывания воды и сравнения поведения различных целлюлозных материалов для ПКМ с матрице на основе гидрофильных полимеров. For polymer composite materials (PCM) with a reinforcing filler made of natural fibers, one of the problems is to assess the quality of fiber preparation and determine the dynamics of the interaction of fibers and a poly-dimensional matrix. The urgency of the problems is due to the expanding volume of research on PCM with plant fibers and various types and depth of pretreatment of plant fibers. The subject of the study was a standard method for determining the wettability of cellulose materials. The purpose of the experimental study is to propose a modified method for determining wettability, potentially suitable for assessing the quality of preparation of reinforcing fillers of PCM from plant fibers. The standard GOST and modified method for determining wettability were used. As a test material, wood cellulose, semi-green sulfite from coniferous wood in the form of a cellulose folder was used. Cellulose samples were mechanically loosened to elementary fibers and tested for wettability. Three test schemes were used – weighing a cup with a suspension immersed in water (scheme 1), weighing a vessel with water (scheme 2), standard procedure according to GOST (scheme 3). According to schemes 1 and 2, measurements were carried out for up to 120 seconds, according to scheme 3 – 30 seconds. The experiments were carried out in threefold repetition. The essence of the modified method for determining the permeability is based on the constant control of the weight of the suspension as the sorption of water moisture. The obtained laws of the kinetics of the process showed that the amount of water moisture absorbed by the samples varies non-linearly over time. The wettability values determined according to various schemes, taking into account deviations, correspond to each other. The determination of wettability by the modified method is proposed to be carried out within 120 seconds, periodically monitoring the readings of the scales. The proposed modified method can be used for research purposes to study the dynamics of water absorption and compare the behavior of various cellulose materials for PCM with a matrix based on hydrophilic polymers.

scholarly journals Heat Processing and Change of Proper Indicators of Basalts

Land Science ◽  
2020 ◽  
Vol 2 (2) ◽  
pp. p1
Author(s):  
Rashidova R K ◽  
Kurbanov Abdirakhim Ahmedovich ◽  
Aliyev T ◽  
Jiyanov A B ◽  
Turdieva O J ◽  
...  
Keyword(s):  
Heat Treatment ◽  
Chemical Composition ◽  
Raw Materials ◽  
Practical Interest ◽  
Heat Processing ◽  
High Quality ◽  
Mineral Raw Materials ◽  
Different Color ◽  
Basalt Rock

This paper presents the results of the analysis of the quality of basalts, their heat treatment and studies of changes in the chemical composition of basalts, which leads to a change in the external color of partially processed basalt raw materials (hereinafter referred to as semi-finished product). The results of a study of purified basalt from slime, impurities and hydroxides, changes in the chemical composition of basalt rock are presented. The prospects of heat treatment of a semi-finished product and obtaining multi-colored products from mineral raw materials is shown. It was found that the optimal firing temperature of the semi-finished product, the possible options for changing the external color and the criterion points of the thermal effect at which the basalt semi-finished product changes the external shade. These statements are of great scientific and practical interest in the fact that during the heat treatment of a semifinished product, basalt easily overheats and gradually acquires a different color, which occurs to a liquids temperature and allows the future to plan to obtain high-quality multi-colored products from basalts, for example, products for design.

scholarly journals LOW-MELTING UNFRITTED GLAZE IN THE MATERIALS SYSTEM "QUARTZ SAND-ULEXIT-SODA-FELVESPATCH CONCENTRATE

2021 ◽  
Vol 6 (9) ◽  
pp. 87-96
Author(s):  
V. Onishchuk ◽  
S. Ageeva ◽  
E. Doroganov
Keyword(s):  
Chemical Composition ◽  
Quartz Sand ◽  
Raw Materials ◽  
Glassy State ◽  
Chemical Properties ◽  
Chemical Compositions ◽  
Fundamental Possibility ◽  
Feldspar Concentrate ◽  
Optimal Values

The article presents the results of studies aimed at establishing the possibility of obtaining low-melting nephritized glazes for majolica with a glass transition temperature of not more than 1000 ° C in the system of materials "quartz sand - ulexite - soda - feldspar concentrate". A rational choice of raw materials will ensure the production of slips that are able to maintain their design chemical composition during the application of majolica to the shard, therefore, provide the specified chemical composition of the glaze and contribute to obtaining the required physical, mechanical and chemical properties of the glaze layer. The design of the material compositions of the charges and the chemical compositions of the glaze coatings was carried out using the mathematical planning of the experiment, which significantly reduced the time and material costs for research. The parameters that determine the quality of slips and glaze coatings have been established, their most optimal values have been identified, which ensure the production of acceptable glaze coatings, and the ways to optimize work in the studied direction have been determined. As a result, the fundamental possibility of obtaining low-melting nephritized glazes in the system of materials "quartz sand - ulexite - soda - feldspar concentrate, capable of transforming into a glassy state at temperatures not exceeding 1000 ºC, has been proved.

scholarly journals Hypericum Perforatum Grass: Chemical Composition, Properties, Use

2021 ◽  
pp. 57-63
Author(s):  
И.Ю. Постраш
Keyword(s):  
Chemical Composition ◽  
Hypericum Perforatum ◽  
Raw Materials ◽  
Extraction Process ◽  
Pharmaceutical Products ◽  
The Body ◽  
Biologically Active ◽  
Quantitative Relation ◽  
Resource Saving ◽  
Two Phase

Трава зверобоя является ценным лекарственным растением, так как содержит большое число разнообразных биологически активных соединений, важнейшими из которых являются флавоноиды (1,5–5%), нафтодиантроны, дубильные вещества (10–13%), эфирное масло (0,1–0,33%) и др. Препараты, содержащие зверобой, комплексно воздействуют на организм, они оказывают противовоспалительное, антимикробное, антидепрессивное, противовирусное, кровоостанавливающее действие. Трава зверобоя применяется в виде чаёв, отваров, водных настоев, спиртовых и масляных настоек, мазей, сухих экстрактов. В ветеринарной медицине широко применяют настои и отвары травы зверобоя при заболеваниях ЖКТ: диспепсиях, гастроэнтеритах, острых и хронических колитах (КРС, овцы, козы, свиньи, собаки и др.), а также при лечении смешанных инвазий. Настои и настойку применяют также наружно при стоматитах, гингивитах, фарингитах. Несмотря на перечисленный выше ассортимент лекарственных форм зверобоя, активно ведутся научные исследования по оптимизации способов извлечения биологически активных веществ (БАВ) из травы зверобоя продырявленного. В ходе экспериментов исследователи варьируют различные параметры процесса экстракции: химический состав экстрагентов (монофазная и двухфазная экстракция), время и температуру экстракционного процесса, количественное соотношение сырья и экстрагентов, степень измельчения сырья, последовательность технологических операций, возможность применения излучения и др. Разработки новых ресурсосберегающих технологий переработки зверобоя продырявленного будут способствовать снижению себестоимости фармацевтической продукции и улучшению её фармакологических свойств. Hypericum perforatum grass is a valuable medicinal plant, since it contains a large number of various biologically active compounds, the most important of which are flavonoids (1.5–5%), naphthodianthrones, tannins (10–13%), aethereal oil (0.1–0.33%), etc. Preparations containing Hypericum perforatum have a complex effect on the body, they have an anti-inflammatory, antimicrobial, antidepressant, antiviral, hemostatic effect. Hypericum perforatum grass is used in the form of teas, apozems, water infusions, alcohol and oil tinctures, ointments, dry extracts. In veterinary medicine, infusions and decoctions of Hypericum perforatum grass are widely used in diseases of the gastrointestinal tract: dyspeptic disorder, gastroenteritis, acute and chronic colitis (cattle, sheep, goats, pigs, dogs, etc.), as well as in the treatment of mixed invasions. Infusions and tincture are also used externally for stomatitis, gingivitis, blennisthmia. Despite the above range of dosage forms of Hypericum perforatum, researches are actively conducted to optimize methods of extracting biologically active substances (BAS) from Hypericum perforatum grass. During the experiments, researchers vary various parameters of the extraction process: the chemical composition of extragents (monophasic and two-phase extraction), the time and temperature of the extractive process, the quantitative relation of raw materials to extragents, the dispersity of raw materials, the sequence of technological operations, the possibility of using radiation, etc. The development of new resource-saving technologies for processing Hypericum perforatum will help reduce the cost of pharmaceutical products and improve its pharmacological properties.

scholarly journals THE EFFECT OF THE ENERGY PROCESS ON THE CHEMICAL COMPOSITION OF PLANT RAW MATERIAL OB-TAINED FROM LEAVES OF THE ASPEN OF THE GENERAL

2018 ◽  
pp. 251-259
Author(s):  
Aleksandra Viktorovna Nekhorosheva ◽  
Sergey Viktorovich Nekhoroshev ◽  
Aleksey Anatol'yevich Drenin ◽  
Erkin Hozhiakbirovich Botirov ◽  
Nikolay Viktorovich Gornikov ◽  
...  
Keyword(s):  
Chemical Composition ◽  
Raw Materials ◽  
Biologically Active ◽  
Raw Material ◽  
Comparative Characteristic ◽  
Active Components ◽  
Extractive Substances ◽  
Vegetable Raw Materials ◽  
Analytical Approaches

The analysis of the chemical composition of the vegetable raw materials received from leaves of an aspen ordinary, family plants Willow (Salicaceae), growing in the territory of the Khanty-Mansi autonomous district Yugra is provided in article. The choice of raw materials is caused by a large supply and fast reproducibility of a raw resource. In work numerical indicators and indicators of high quality of raw materials are established (humidity, the general ashes, sulphatic ashes, ashes not soluble in 10% to hydrochloric acid, extractive substances). The way of extraction of vegetable raw materials is reasonable, the comparative characteristic of content of extractive substances is provided in the received extracts. It is shown that the average content of extractive substances in native samples is 27.9%, the content of polysaccharides – 10.9%. The qualitative and quantitative analysis of biologically active agents is carried out by method of a highly effective liquid chromatography. The dominating components in samples of the plants growing in the territory of one land plot are салицин 510 mg of %, гиперозид 170 mg of %, routines of 210 mg of %. Influence of process of fermentation on the chemical composition of the vegetable raw materials received from leaves of an aspen ordinary is studied. The greatest exit of phenolic connections at impact on vegetable raw materials of fermentation is established by cold. The positive effect of impact of fermentation by crushing on quantity of the identified biologically active components is defined. Work was carried out for assessment of phytochemical parameters of quality of vegetable raw materials and formation of justification of analytical approaches to diagnostics of vegetable raw materials of the explored territory.

scholarly journals State of the Art in the Production of Charcoal: a Review

2021 ◽  
Vol 15 (1) ◽  
pp. 61-73
Author(s):  
Serhiy Pyshyev ◽  
◽  
Denis Miroshnichenko ◽  
Ivan Malik ◽  
Aquilino Bautista Contreras ◽  
...  
Keyword(s):  
Chemical Composition ◽  
State Of The Art ◽  
Raw Materials ◽  
Carbonization Temperature ◽  
Oxygen Level ◽  
Charcoal Production ◽  
Yield And Quality ◽  
Factors Influencing ◽  
Temperature Heating

The use of charcoal (CC) for various industries was analysed; the modern ideas about the factors influencing the process of obtaining CC were considered. The effect of raw materials nature (wood or agricultural wastes) and their characteristics (size, physical properties, chemical composition), as well as carbonization temperature, heating rate, oxygen level and pressure on the yield and quality of CC was described. The existing technologies for charcoal production were analyzed; they were classified according to the type of heating initiation and temperature maintenance during the carbonization process. The Lambiotte, DPC and Carbonex technologies were considered.

scholarly journals Chemical composition of complete fodder mixes for pig diet during 2007-2009

2012 ◽  
Vol 66 (3-4) ◽  
pp. 311-323
Author(s):  
Dragan Sefer ◽  
Branislav Petrujkic ◽  
Radmila Markovic ◽  
Svetlana Grdovic ◽  
Stamen Radulovic ◽  
...  
Keyword(s):  
Chemical Composition ◽  
Animal Feed ◽  
Raw Materials ◽  
Growing Pigs ◽  
Cellulose Content ◽  
Official Gazette ◽  
Growing Pig ◽  
Accredited Laboratory ◽  
The Republic

Intensive pig breeding implies, among other things, the use of complete mixes in their diet in correspondence with the animals? age and purpose. In the course of a threeyear period (2007-2009) the accredited laboratory of the Department for Nutrition and Botanics of the Faculty for Veterinary Medicine, Univerisity of Belgrade, analysed 65 fodder mix samples from the territory of Serbia intended for the diet of all categories of pigs, namely: 6 samples of complete mixes for the diet of pregnant sows and gilts, 9 samples of complete mixes for the diet of nursing sows and boar, 4 samples of complete mixes for enhanced diet of piglets, 13 samples of complete mixes for piglets in programme I up to 15 kg, 12 samples of complete mixes for piglets in programme II from 15-25 kg, 10 samples of complete mixes for growing pigs in fattening programme I from 25-60 kg, and 11 samples of complete mixes for pigs in fattening programme II from 60-100 kg. The analyses covered the contents of the elementary nutritive matter and the obtained results were compared with the quality conditions prescribed under the Regulations on the quality of animal feed (Official Gazette of the Republic of Serbia No. 41/09). It was established that there were certain deviations with regard to the values presented in the Regulations on the quality of animal feed (Official Gazette of the Republic of Serbia No. 41/09) in the average protein content in complete mixes for piglet diet II, 15-25 kg (17.89?1.19%) and in the mixes for growing pig diet II, 60-100 kg (13.95?0.53%). The established average fat content was lower in the mixes for enhanced piglet diet (5.99? 0.72%) and in mixes for piglet diet I, up to 15 kg (4.95?1.41%). A higher average cellulose content (4.08?0.73%) was established in mixes for enhanced piglet diet. Furthermore, significant differences from the values prescribed under the Regulations were established in certain samples. The established differences in the chemical composition of certain samples of the examined mixes without a doubt indicate the need for constant and multilevel monitoring of raw materials and finished products in order to preserve health and to ensure the best possible utilization of the production potential of animals.

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