scholarly journals Physico-chemical interaction in the Tl2Se–SnSe–PbSe quasiternary system

2012 ◽  
Vol 5 (3/4) ◽  
pp. 118-122
Author(s):  
M.J. FILEP ◽  
◽  
M.Yu. SABOV ◽  
I.E. BARCHIY ◽  
◽  
...  
Keyword(s):  
Chemical Interaction ◽  
Physico Chemical ◽  
Quasiternary System

Physico-chemical interaction in the Tl2Se–HgSe–DIVSe2 systems (DIV – Si, Sn)

2012 ◽  
Vol 47 (11) ◽  
pp. 3830-3834 ◽  
Author(s):  
M.Yu. Mozolyuk ◽  
L.V. Piskach ◽  
A.O. Fedorchuk ◽  
I.D. Olekseyuk ◽  
O.V. Parasyuk
Keyword(s):  
Chemical Interaction ◽  
Physico Chemical

scholarly journals PHYSICO-CHEMICAL INTERACTION OF THE COPPER AND ANTIMONY IODIDES

2021 ◽  
pp. 43-47
Author(s):  
P.R. Mammadli ◽  
Keyword(s):  
Thermal Analysis ◽  
Phase Diagram ◽  
Differential Thermal Analysis ◽  
Chemical Interaction ◽  
Equilibrium Temperature ◽  
Polymorphic Transformations ◽  
X Ray ◽  
Immiscibility Region ◽  
Physico Chemical ◽  
Concentration Interval

The character of the mutual interaction of the components in the CuI-SbI3 system was studied by differential thermal analysis and X-ray phase analysis methods and its phase diagram was constructed. It was found that the system is quasi-binary and forms a monotectic phase diagram. The immiscibility region covers ~15-93 mol% SbI3 concentration interval at the monotectic equilibrium temperature (~ 4930С). The temperatures of polymorphic transformations of the CuI compound in the system drop slightly and these phase transitions take place by metatectic reactions

scholarly journals Effect of polymeric biocide polyhexamethylene guanidine hydrochloride on morpho-physiological and biochemical parameters of wheat seedlings under copper stress

2020 ◽  
Vol 7 (1) ◽  
pp. 49-58 ◽  
Author(s):  
L. Lyoshyna ◽  
O. Tarasyuk ◽  
O. Bulko ◽  
S. Rogalsky ◽  
T. Kamenieva ◽  
...  
Keyword(s):  
Copper Sulfate ◽  
Chemical Interaction ◽  
Copper Ions ◽  
Guanidine Hydrochloride ◽  
Copper Stress ◽  
Wheat Seed ◽  
Wheat Seedlings ◽  
Water Solutions ◽  
Polyhexamethylene Guanidine ◽  
Physico Chemical

Aim. To study the effect of polymeric biocide polyhexamethylene guanidine hydrochloride (PHMG-Cl) on morphophysiological and biochemical parameters of wheat seedlings in the presence of toxic concentration of copper ions. Methods. The growth-stimulating activity of PHMG-Cl in pure state, as well as in the presence of elevated concentrations of copper ions was studied by phytotesting method using wheat seed as a test culture. Physico-chemical interaction between PHMG-Cl and CuSO4 in water solutions was studied by spectrophotometry. Results. Wheat seed treatment with water solutions of polymeric biocide PHMG-Cl in the concentration range of 0.01–0.1 % causes an increase in the length of roots and shoots by over 50 % after 7 days of incubation. The concentration of PHMG-Cl of 1 % was found to have a depressive effect on growth characteristics of the tested plants. This fact indicates that the phytotoxicity of PHMG-Cl is at least two orders of magnitude lower compared with a common pesticide copper sulfate. Thus, wheat seed soaking in 200 μM (0.003 %) water solution of copper sulfate causes reduced length of shoots and roots (by 65 and 34 %, respectively), as well as reduced weight of shoots (by 20 %) and roots (by 74 %) The analysis of green mass showed signifi cantly reduced content of carotenoids (by 26 %) and water soluble fl avonoids (by 37 %), as well as chlorophyll a/b ratio (by 18 %) that indicates decreased plant metabolic activity. However, the toxic effect of copper sulfate ions signifi cantly diminished in the presence of PHMG-Cl (0.01 %). Thus, the length of shoots and roots was found to increase by 24 and 64 %, respectively, compared to the samples treated with CuSO4. Moreover, the content of pigments and fl avonoids in the green mass of seedlings reached the level of control samples. The results of spectrophotometric studies indicate the absence of physico-chemical interaction between PHMG-Cl and copper sulfate in water solutions. Conclusions. The polymeric biocide PHMG-Cl effectively stimulates growth and development of wheat seedlings in the concentration range of its water solutions of 0.01–0.1 %. In the presence of toxic copper sulfate concentration, PHMG-Cl does not possess the growth stimulating activity. However, the polymeric biocide signifi cantly improves copper stress resistance of plants, and normalizes their morpho-physiological indicators, photosynthetic characteristics and secondary exchange.

3 The physico-chemical interaction of fluorine with the environment

2021 ◽  
pp. 17-38
Author(s):  
Rubina Sahin ◽  
Anil Kumar ◽  
Rituraj Chandrakar ◽  
Marta Michalska-Domańska ◽  
Vikas Dubey
Keyword(s):  
Chemical Interaction ◽  
Physico Chemical

scholarly journals Physico–Chemical Interaction between Clay Minerals and Albumin Protein according to the Type of Clay

Minerals ◽  
2019 ◽  
Vol 9 (7) ◽  
pp. 396 ◽  
Author(s):  
Kim ◽  
Oh
Keyword(s):  
Circular Dichroism ◽  
Fluorescence Quenching ◽  
Conformational Change ◽  
Clay Minerals ◽  
Protein Denaturation ◽  
Chemical Interaction ◽  
Harmful Effect ◽  
Chemical Effect ◽  
Physico Chemical ◽  
Circular Dichroïsm

Clay minerals are widely utilized in pharmaceutical and dermatological sciences as a gastrointestinal medicine or skin remediation agent. In order to verify the feasibility of clays as an injection, pill, or topical agent, it is important to study their interactions with biological components, such as proteins. In this study, we utilized a protein fluorescence quenching assay and circular dichroism spectroscopy to evaluate general aspects of protein denaturation and conformational change, respectively. Three different clays; layered double oxide (LDO), montmorilonite (MMT) and halloysite nanotube (HNT), were treated with albumin and the physico-chemical effect on the protein’s conformation was investigated. MMT was shown to influence the conformational change the most, owing to the large accessible adsorption site. HNT showed meaningful circular dichroism (CD) band collapse as well as fluorescence quenching in the protein, suggesting a potential harmful effect of HNT toward the protein. Among the three tested clays, LDO was determined to affect protein structure the least in terms of three-dimensional conformation and helical structure.

scholarly journals Mortars for 3D printing

2018 ◽  
Vol 143 ◽  
pp. 02013
Author(s):  
Olga Demyanenko ◽  
Ekaterina Sorokina ◽  
Natalya Kopanitsa ◽  
Yurij Sarkisov
Keyword(s):  
3D Printing ◽  
Cement Paste ◽  
Chemical Interaction ◽  
Early Age ◽  
Hardened Cement ◽  
Hardened Cement Paste ◽  
Operational Characteristics ◽  
Physico Chemical ◽  
Key Factor ◽  
Technical Specifications

The paper is aimed at developing scientifically proven compositions of mortars for 3D printing modified by a peat-based admixture with improved operational characteristics. The paper outlines the results of experimental research on hardened cement paste and concrete mixture with the use of modifying admixture MT-600 (thermally modified peat). It is found that strength of hardened cement paste increases at early age when using finely dispersed admixtures, which is the key factor for formation of construction and technical specifications of concrete for 3D printing technologies. The composition of new formations of hardened cement paste modified by MT-600 admixture were obtained, which enabled to suggest the possibility of their physico-chemical interaction while hardening.

Sign in / Sign up

Export Citation Format

Share Document