scholarly journals Development of a New Reclamation Material by Hazardous Waste Solidification/Stabilization

2012 ◽  
Vol 446-449 ◽  
pp. 2793-2799
Author(s):  
Bozena Vacenovska ◽  
Rostislav Drochytka
Keyword(s):  
Hazardous Waste ◽  
Laboratory Testing ◽  
Dry Matter ◽  
Ground Surface ◽  
Raw Material ◽  
Fluidized Bed Combustion ◽  
Short Term ◽  
S Matrix ◽  
Unconfined Strength

This paper deals with the possibility of hazardous waste solidification/stabilization (S/S) using a secondary raw material – fly ash from fluidized bed combustion – in order to find and verify a suitable S/S formula and an appropriate way to ensure that the properties of the S/S product will allow its further use in civil engineering as a reclamation material. The aim of this paper is to examine the properties of the S/S product and to assess its impact on the environment. Laboratory testing was focused on screening those properties that may adversely affect the environment during the use of the product on the ground surface. During laboratory testing the S/S product’s properties were verified using leaching tests, unconfined strength testing, ecotoxicological tests and the determination of pollutant content in dry matter. This paper also considers the two-year durability of the S/S product’s properties in order to verify the short-term durability of the S/S matrix.

scholarly journals Study of the effect of narrow-leaved cypress extract on the properties of baking yeast

2018 ◽  
Vol 80 (3) ◽  
pp. 243-247
Author(s):  
A. G. Belyaev ◽  
M. A. Zaikina ◽  
A. E. Kovaleva ◽  
E. A. Pyanikova
Keyword(s):  
Aqueous Solution ◽  
Dry Matter ◽  
Raw Material ◽  
Yeast Cells ◽  
Additional Source ◽  
Lemon Grass ◽  
Other Substances ◽  
The Individual ◽  
Constant Growth

This article presents the results of the study of the beneficial properties of narrow-leaved rosebay willowherb (Chamerion angusti folium (L.) Holub) (the contents of vitamins, minerals and other substances which positively affect the human body). The process of extraction of a narrow-leaved spray from a dry plant raw material with an aqueous solution was looked at. The investigation of the concentration of narrow-leaved rosebay willowherb in an aqueous solution using a refractometer revealed that a 20 min. infusion shows the constant growth of dry matter in the extract. However after the 20 min. period the concentration of solids stays constant. Therefore, the optimum infusion time was set to 20 min. As a result of the study, the accelerated method of lifting the pressed yeast using an aqueous solution and a lemon grass extract revealed that, with the addition of the plant additive, the lifting power of the yeast decreased by 10.5%.This indicates that the products of narrow-leaved rosebay willowherb favorably affect yeast cells. Yeast suspensions from water and yeast and aqueous extract of narrow-leaved rosebay willowherb and yeast spray have been studied. After 60 min. of thermostating and further microscope study, with the determination of the concentration of yeast cells with the help of Goryaev's chamber, allowed to establish that the concentration of yeast cells in suspension with the extract of narrow-leaved rosebay willowherb exceeds the concentration in the control suspension by almost 1.5 times. This phenomenon is caused by the stimulating effect of the individual components that make up the narrow-leaved rosebay willowherb (sugars, vitamins, minerals and other components), which are an additional source of energy. It is proposed to use the spray extract of the narrow-leaved rosebay willowherb as a raw material in the preparation of bakery products for preventive purposes.

scholarly journals Determination of Chemical Composition of Plums During Pre-Treatment and Drying

2012 ◽  
Vol 19 (1) ◽  
pp. 89-96 ◽  
Author(s):  
Dorota Walkowiak-Tomczak
Keyword(s):  
Chemical Composition ◽  
Dry Matter ◽  
Sucrose Solution ◽  
Osmotic Dehydration ◽  
Reference Sample ◽  
Raw Material ◽  
Pre Treatment ◽  
Pretreatment Conditions ◽  
Drying Conditions

Determination of Chemical Composition of Plums During Pre-Treatment and DryingThanks to drying, fruits are available on the market throughout the year. Parameters of drying conditions affect eg the content of bioactive compounds in the product. The aim of the study was to investigate the effect of pretreatment conditions and the applied drying method on changes in the chemical composition of plums. Analyses were conducted on plums cv. 'Valor', which were subjected to pre-treatment including blanching, drilling and osmotic dehydration. Next they were dried by the convection method at air temperature of 60°C and flow rate of 1.5 m/s. Dehydration was run in a 61.5% sucrose solution at a temperature of 50°C for 1 or 2 h. Convection-dried plums, with no osmotic dehydration applied, constituted the reference sample. In fresh, dehydrated and dried fruits determinations included dry matter, polyphenols by colorimetry with the Folin reagent and contents of sugars by colorimetry using 3,5-DNS acid. As a result of blanching and dehydration the content of dry matter increased. Water loss after dehydration amounted to as much as 1.45 g H2O/g d.m.0after 2 h in comparison with blanched plums. As a result of dehydration total contents of sugars and polyphenols in plums decreased (mg/100 g d.m.). In convection-dried prunes the content of polyphenols was by 30÷50% higher than in the raw material, but lower than in the reference sample.

DETERMINATION OF FATTY ACIDS COMPONENTS COMPOSITION IN THYMUS X CIRIODORUS VAR. «SILVER QUEEN» HERBAL RAW MATERIAL

Fitoterapia ◽  
2019 ◽  
Vol 4 (4) ◽  
pp. 55-58
Author(s):  
J. M. Steshenko ◽  
◽  
O. V. Мazulin ◽  
G. P. Smoylovska ◽  
G. V. Mazulin ◽  
...  
Keyword(s):  
Fatty Acids ◽  
Raw Material

Storage Problems of Poplar Chips from Short Rotation Plantations with Special Emphasis on Fungal Development

2012 ◽  
Vol 8 (1) ◽  
pp. 123-132 ◽  
Author(s):  
Zsuzsanna Horváth ◽  
Béla Marosvölgyi ◽  
Christine Idler ◽  
Ralf Pecenka ◽  
Hannes Lenz
Keyword(s):  
Particle Size ◽  
Health Risk ◽  
Dry Matter ◽  
Ph Value ◽  
Wood Chips ◽  
Raw Material ◽  
Special Focus ◽  
Fungal Development ◽  
Short Rotation ◽  
Fungal Particles

Abstract - There are several problems in storing wood chips freshly harvested from short rotation plantations, which result in quality losses as well as in dry matter and energy losses. The factors influencing the degradation of raw material are examined in this paper with special focus on fungal development. An excessive growth of fungi is connected to dry matter losses and also to an increased health risk during raw material handling. The following factors were measured during 6 months storage of poplar wood chips depending on particle size: box temperature, moisture content, pH-value, appearance of fungi in the storage and the concentration of fungal particles in the air. The results show a close connection between particle size, temperature and attack of fungi. During the storage mesophilic and termophilic species of the genera Alternaria, Aspergillus, Cladosporium, Mucor and Penicillium appeared. The concentration of fungal particles is the highest for fine chips and decreases in bigger particles. There was a special focus on the investigation of the properties of coarse chips (G 50), which represent a good compromise between handling, storage losses and health risk due to fungal development.

Determination of allostatic load dynamics in the assessment of adaptation in temporary workers in the Arctic

2020 ◽  
pp. 547-548
Author(s):  
O. Yu. Atkov ◽  
S. G. Gorokhova
Keyword(s):  
Body Mass Index ◽  
Glucose Level ◽  
Shift Work ◽  
Allostatic Load ◽  
The Arctic ◽  
Temporary Workers ◽  
Short Term ◽  
Short Term Adaptation ◽  
The Individual

The individual dynamics of the allostatic load index was revealed mainly due to changes in the glucose level, body mass index, which makes it applicable for assessing the short-term adaptation to the stay in the conditions of shift work

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