scholarly journals Basalt fiber based biocide materials

Surface ◽  
2021 ◽  
Vol 13(28) ◽  
pp. 182-187
Author(s):  
V. M. Shevchenko ◽  
◽  
N. A. Guts ◽  
A. Ye. Shpak ◽  
E. R. Surovtseva ◽  
...  
Keyword(s):  
Basalt Fiber ◽  
Chemical Properties ◽  
Biochemical Properties ◽  
Fungal Resistance ◽  
Fibrous Materials ◽  
Increasing Temperature ◽  
Favorable Conditions ◽  
High Degree ◽  
Physical And Chemical ◽  
Growth Of Fungi

It has long been known that materials containing cellulose fibers in their composition are destroyed by molds, microorganisms, actinomycetes, which use cellulose as a carbon source. Different fibrous materials to varying degrees (but always) are affected by molds. It is known that linseed and cotton types of paper are affected by the smallest number of fungi, and sulphate ones by the largest. The most biostable is cotton paper, the composition of which contains chalk in a sufficiently large amount. The observations carried out by the authors showed that the highest biostability (fungal resistance) is characteristic of papers containing chalk and kaolin, the lowest is glued types of paper with a high degree of sizing. Aging of paper with increasing temperature increases the overall susceptibility of all types of paper tested without exception. Obviously, changes in the physical and chemical properties of paper as a result of aging create more favorable conditions for the growth of fungi. It is well known that paper can serve as a medium for the spread of infectious diseases. The authors of the article studied the thermo-physical properties of basalt fiber and investigated the possibility of using it for the manufacture of heat-insulating technical paper.Obtaining materials that are not affected by bacteria, insects and molds (fungicidal,insecticidal) can be solved by using inorganic fibers, which are obtained from almost unlimited natural resources and which have excellent biochemical properties. It should be noted that the concept of "biocidal" paper (material) is collective. It combines species that differ in their ability to kill bacteria (bactericidal), molds (fungicidal), insects (insecticidal). Each of the biocidal types of materials has two or more of these properties.

scholarly journals DFT calculation for the electronic properties and quantum capacitance of pure and doped Zr2CO2 as electrode of supercapacitors

2021 ◽  
Author(s):  
Shuo Xu ◽  
Shi-Jie Wang ◽  
Li Xiao-Hong ◽  
Hong-Ling Cui
Keyword(s):  
Electronic Properties ◽  
Electrode Materials ◽  
Chemical Properties ◽  
Effect Of Temperature ◽  
Quantum Capacitance ◽  
Substitutional Site ◽  
Level Shifts ◽  
Dirac Distribution ◽  
Increasing Temperature ◽  
Physical And Chemical

Defect and doping are effective methods to modulate the physical and chemical properties of materials. In this report, we investigated the structural stability, electronic properties and quantum capacitance (Cdiff) of Zr2CO2 by changing the dopants of Si, Ge, Sn, N, B, S and F in the substitutional site. The doping of F, N, and S atoms makes the system undergo the semiconductor-to-conductor transition, while the doping of Si, Ge, and Sn maintains the semiconductor characteristics. The Cdiff of the doped systems are further explored. The B-doped system can be used as cathode materials, while the systems doped by S, F, N, Sn atoms are promising anode materials of asymmetric supercapacitors, especially for the S-doped system. The improved Cdiff mainly originates from Fermi-level shifts and Fermi-Dirac distribution by the introduction of the dopant. The effect of temperature on Cdiff is further explored. The result indicates that the maximum Cdiff of the studied systems gradually decreases with the increasing temperature. Our investigation can provide useful theoretical basis for designing and developing the ideal electrode materials for supercapacitors.

scholarly journals Proanthocyanidins: Oligomeric Structures with Unique Biochemical Properties and Great Therapeutic Promise

2012 ◽  
Vol 7 (3) ◽  
pp. 1934578X1200700 ◽  
Author(s):  
Zhanjie Xu ◽  
Peng Du ◽  
Peter Meiser ◽  
Claus Jacob
Keyword(s):  
Protein Interactions ◽  
Biological Activities ◽  
Antioxidant Properties ◽  
Chemical Properties ◽  
Cancer Chemoprevention ◽  
Biochemical Properties ◽  
Synthetic Methods ◽  
Practical Applications ◽  
Wide Range ◽  
Physical And Chemical

Proanthocyanidins represent a unique class of oligomeric and polymeric secondary metabolites found ubiquitously and in considerable amounts in plants and some algae. These substances exhibit a range of rather surprising physical and chemical properties which, once applied to living organisms, are translated into a multitude of biological activities. The latter include antioxidant properties, cancer chemoprevention, anti-inflammatory and anti-diabetic effects as well as some exceptional, yet highly interesting activities, such as anti-nutritional and antimicrobial activity. Despite the wide range of activities and possible medical/agricultural applications of proanthocyanidins, many questions still remain, including issues related to bioavailability, metabolism and the precise biochemical, extra- and intracellular targets and mode(s) of action of these highly potent materials. Among the various physical and chemical interactions of such substances, strong binding to proteins appears to form the basis of many of their biological activities. Once easy-to-use synthetic methods to produce appropriate quantities of pure proanthocyanidins are available, it will be possible to identify the prime biological targets of these oligomers, study oligomer-protein interactions in more detail and develop possible practical applications in medicine and agriculture.

EFFECT OF SUBSOILING ON WHEAT YIELD AND SALT DISTRIBUTION OF A SOLONETZIC SOIL

1986 ◽  
Vol 66 (3) ◽  
pp. 437-443 ◽  
Author(s):  
C. CHANG ◽  
T. G. SOMMERFELDT ◽  
G. B. SCHAALJE ◽  
C. J. PALMER
Keyword(s):  
Spatial Variability ◽  
Soil Salinity ◽  
Wheat Yield ◽  
Chemical Properties ◽  
Triticum Aestivum L ◽  
Solonetzic Soil ◽  
Hard Spring Wheat ◽  
Salt Distribution ◽  
High Degree ◽  
Physical And Chemical

The effects of subsoiling, deep ripping to 52 cm depth, in the amelioration of a Solonetzic soil under irrigated and nonirrigated conditions were examined at the Vauxhall Research Substation in Alberta. All plots were fertilized by broadcasting N and P2O5 at rates of 80 and 42 kg ha−1, respectively. Hard spring wheat (Triticum aestivum L. ’Neepawa’) was grown annually from 1980 to 1984. The plot area had a high degree of spatial variability in both physical and chemical properties of the soil. Subsoiling in the fall of 1979 and 1980 had no significant effects on soil salinity and sodicity or on wheat yield under nonirrigated conditions. However, under irrigated conditions, subsoiling enhanced the downward movement of salts and had a significant overall profile (to 90 cm) effect on soil salinity and sodicity, but it had no significant effect among depths within the profile. Subsoiling also had no significant effect on wheat yield under irrigated conditions. Irrigation alone improved the soil salinity and sodicity conditions, increased wheat yields, and reduced yield variability. Key words: Amelioration, irrigation, salinity, sodicity, spatial variability

Impact of Insufficient Cleaning on the Quality of Molybdenum Layer Applied by Thermal Spraying

2013 ◽  
Vol 801 ◽  
pp. 35-40
Author(s):  
Marián Bujna ◽  
Miroslav Prístavka ◽  
Pavol Kaplík
Keyword(s):  
Erosion Resistance ◽  
Thermal Spraying ◽  
Chemical Properties ◽  
Poor Quality ◽  
Physical And Chemical Properties ◽  
High Degree ◽  
Physical And Chemical ◽  
The Impact ◽  
And Chemical Properties

Thermal spraying influences several physical and chemical properties of the coating surface. The most important of them are hardness, density, porosity, corrosion resistance and adhesion. This technology of surface treatment of material is often used for its high degree of hardness. Hardness and erosion resistance are the parameters that need to be achieved particularly in working conditions where there is excessive component wear. In this paper, we deal with the impact of purifying on the quality of molybdenum layer. Insufficient cleaning may result in a poor quality of the sprayed layer. Our aim is to measure and analyse the quality of molybdenum layer thickness applied by thermal spraying after insufficient cleaning.

scholarly journals Influence of putrefactive decomposition of sheep hooves on the cytomorphological composition and biochemical properties of blood

2021 ◽  
Vol 37 ◽  
pp. 00075
Author(s):  
Daria Kazakova ◽  
Sergey Kolomiytsev ◽  
Vera Suvorova
Keyword(s):  
Blood Serum ◽  
Biochemical Composition ◽  
Chemical Properties ◽  
Clinical Analysis ◽  
Biochemical Properties ◽  
Sodium Potassium ◽  
Blood Samples ◽  
Healthy Sheep ◽  
Calcium Phosphorus ◽  
Physical And Chemical

We studied the effect of putrefactive decomposition of sheep hooves on the cellular composition, physical and chemical properties of blood, as well as on the biochemical composition of its serum. In the production conditions of the sheep-breeding complex, orthopedic medical examination and identification of sheep with putrefactive decay of the hooves were carried out. Subsequently, blood samples were collected from 10 sick sheep and 10 clinically healthy animals for general clinical analysis and biochemical analysis of their serum. The selected blood samples were analyzed on the haematological automatic analyser "Abacus vet 10" and the semi-automatic biochemical analyser "Stat fax 300". In the biochemical composition of blood serum, putrefactive decay of hooves increased the concentration of total protein by 7.94%, total bilirubin by 22.08%, urea by 75.18%, and reduced the concentration of glucose by 17.88% relative to clinically healthy sheep. At the same time, the activity of aspartate aminotransferase, alanine aminotransferase, alkaline phosphatase, and creatine kinase in the blood serum of sheep with putrefactive hoof decay exceeded similar indicators in clinically healthy sheep by 9.65%, 9.16%, 13.70%, and 19.90%, respectively. In addition, the concentration of sodium, potassium, calcium, phosphorus and magnesium in the blood serum of sheep with putrefactive decay of hooves was by 15.44%, 9.64%, 3.49%, 25.35% and 9.78% less than in the blood serum of clinically healthy sheep.

On Research of Basalt Fiber Used in Asphalt Concrete

2013 ◽  
Vol 791-793 ◽  
pp. 456-459
Author(s):  
Jian Jun Li ◽  
Yan Chun Liu
Keyword(s):  
Asphalt Concrete ◽  
Basalt Fiber ◽  
Chemical Properties ◽  
Market Value ◽  
Physical And Chemical Properties ◽  
Basalt Fibers ◽  
Green Material ◽  
New Type ◽  
Physical And Chemical ◽  
And Chemical Properties

As a new type of green material with excellent physical and chemical properties and mechanical properties. Basalt fiber are widely used in the field of civil construction. This paper focused on the use of basalt fibers to improve the mechanism of asphalt concrete, demonstrated the prospects and market value of the basalt fiber that are widely used in asphalt concrete

In Situ Conservation of the Roman Mosaics at the Villa of Boscéaz (Orbe, Switzerland): Diagnosis of Risks Involved

1996 ◽  
Vol 462 ◽  
Author(s):  
R.J. Flatt ◽  
F.J. Girardet ◽  
D.C. Weidmann
Keyword(s):  
In Situ Conservation ◽  
Chemical Properties ◽  
Climatic Conditions ◽  
The Alps ◽  
Thermal Dilatation ◽  
High Degree ◽  
Physical And Chemical

ABSTRACTIn order to maintain the archaeological integrity of the site of Boscéaz, one of the most remarkable north of the Alps because of the number and quality of its roman mosaics, it is intended to maintain these in situ and on their original support. This mode of conservation implies many risks, mainly linked to the climatic variations and to the presence of water and salts in the ground and the mosaics. The high degree of damage observed on these mosaics discovered more than 150 years ago illustrates this fact.The aim of this study has been to establish a diagnosis of the risks linked to the uncovering and the in situ conservation of a mosaic recently discovered (currently covered with protective materials). This diagnosis has been established on the basis of the measurement of the physical and chemical properties of the mosaic and the ground.It turned out that the rising of salts from the ground to the mosaic would be the major problem and that consequently a dessalaision will have to be carried out. Concerning the choice of the climatic conditions for conservation, the critical zone in which the salts present crystallize was determined. The thermal dilatation of the materials appeared relatively small, but might become damageable in the long term because of a possible hysteresis. The hydrie dilatation turned out to be negligible.

Study on the Physical and Chemical Properties of Lueyang’s Basalt Fiber

2011 ◽  
Vol 239-242 ◽  
pp. 1376-1381 ◽  
Author(s):  
Jian Jun Li ◽  
Ying Meng ◽  
Yan Chun Liu
Keyword(s):  
Basalt Fiber ◽  
Chemical Properties ◽  
Melting Process ◽  
Composite Fiber ◽  
Chemical Components ◽  
Physical And Chemical Properties ◽  
Fiber Materials ◽  
New Generation ◽  
Physical And Chemical ◽  
And Chemical Properties

By deeply analyzing and studying the physical and chemical properties of Lueyang’s basalt fiber, its characteristics such as the chemical components, the crystallization’s upper limit temperature and lower limit temperature during the melting process, and the the viscosity and temperature change during melting process are verified to provide theoretical bases for the industrial production of a new type composite materials, and meanwhile to offer grounds for the development of a new generation of composite fiber materials.

The Performance of Green Basalt Fiber and its Application in the Civil Engineering Field

2012 ◽  
Vol 193-194 ◽  
pp. 548-552 ◽  
Author(s):  
Jian Jun Li ◽  
Ying Meng ◽  
Yan Chun Liu
Keyword(s):  
Basalt Fiber ◽  
Chemical Properties ◽  
Melting Process ◽  
Composite Fiber ◽  
Chemical Components ◽  
New Type ◽  
Fiber Materials ◽  
New Generation ◽  
Physical And Chemical ◽  
Type Composite

By deeply analyzing and studying the physical and chemical properties of Lueyang’s basalt fiber, its characteristics such as the chemical components, the crystallization’s upper limit temperature and lower limit temperature during the melting process, and the the viscosity and temperature change during melting process are verified to provide theoretical bases for the industrial production of a new type composite materials, and meanwhile to offer grounds for the development of a new generation of composite fiber materials.

scholarly journals Assessment of Some Heavy Metals Using Sediments and Bivalvia (Mytilus galloprovincialis) Samples Collected from Tobruk Coast

2021 ◽  
Vol 1 (2) ◽  
pp. 25-31
Keyword(s):  
Heavy Metals ◽  
Mytilus Galloprovincialis ◽  
Chemical Properties ◽  
Absorption Spectrometry ◽  
Control Site ◽  
The Other ◽  
Copper Zinc ◽  
High Degree ◽  
Physical And Chemical ◽  
And Chemical Properties

This study is designed to assess the concentrations of lead, copper, zinc, iron, cadmium and manganese in sediments and bivalvia (Mytilus galloprovincialis) tissues of Tobruk coast. The samples of sediments and bivalvia were collected from four sites around Tobruk city namely as Main port, Ledo, Andolus and Rasbayad (control site), during summer, 2021. The heavy metals of sediments and bivalvia tissues were determined using atomic absorption spectrometry. Also water samples were taken from four sites and physical and chemical properties of water were measured. The results of sediments showed that the Ledo site significantly recorded the higher concentrations of lead (0.624 mg/kg), zinc (73.77 mg/kg), copper (0.450mg/kg) and iron (94.38mg/kg) than those of the other sites, however, the metals of sediments collected from Rasbayad recorded the lowest concentrations. The results of bivalvia tissues revealed that Main port site recorded the greater concentration of lead (0.420 mg/l), zinc (2.185mg/l), cadmium (0.385 mg/l) and copper (3.010 mg/l) than that of other sites. Moreover, Andolus site recorded significantly the higher concentration of iron (14.135 mg/l) than that of other three sites. On the other hand, the Rasbayad recorded the lowest concentration of lead (0.070 mg/l), zinc (0.115 mg/l), cadmium (0.020 mg/l) and copper (0.030 mg/l) in bivalvia tissues. In general, the results indicated a high degree of contamination by heavy metals in sediments and bivalvia of three sites when compared with the control site (Rasbayad) and it is reflect the environmental pressure surrounding the coast of Tobruk, an urgently action is needed to reduce the causes of pollution and contamination by heavy metals.

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