scholarly journals On the relationship between the structural and volumetric properties of solvated metal ions inO-donor solvents using new structural data in amide solvents

2018 ◽  
Vol 20 (21) ◽  
pp. 14525-14536 ◽  
Author(s):  
Daniel Lundberg ◽  
Dorota Warmińska ◽  
Anna Fuchs ◽  
Ingmar Persson
Keyword(s):  
Metal Ions ◽  
Chemical Properties ◽  
Structural Data ◽  
Volumetric Properties ◽  
Physico Chemical ◽  
Solvated Metal Ions ◽  
The Relationship

The relationship between the structural and volumetric properties of ions in solvents with different physico-chemical properties has been studied for 19 cations and six anions in six solvents.

scholarly journals New Activated Carbon from Mine Coal for Adsorption of Dye in Simulated Water or Multiple Heavy Metals in Real Wastewater

Materials ◽  
2020 ◽  
Vol 13 (11) ◽  
pp. 2498 ◽  
Author(s):  
Marwa Elkady ◽  
Hassan Shokry ◽  
Hesham Hamad
Keyword(s):  
Activated Carbon ◽  
Nitric Acid ◽  
Metal Ions ◽  
Low Cost ◽  
Dye Adsorption ◽  
Chemical Properties ◽  
Batch Adsorption ◽  
Maximum Adsorption Capacity ◽  
Physico Chemical ◽  
Multiple Heavy Metals

Nano-activated carbon (NAC) prepared from El-Maghara mine coal were modified with nitric acid solution. Their physico-chemical properties were investigated in terms of methylene blue (MB) adsorption, FTIR, and metal adsorption. Upon oxidation of the ACS with nitric acid, surface oxide groups were observed in the FTIR spectra by absorption peaks at 1750–1250 cm−1. The optimum processes parameters include HNO3/AC ratio (wt./wt.) of 20, oxidation time of 2 h, and the concentration of HNO3 of 10% reaching the maximum adsorption capacity of MB dye. Also, the prepared NAC was characterized by SEM, EDX, TEM, Raman Spectroscopy, and BET analyses. The batch adsorption of MB dye from solution was used for monitoring the behavior of the most proper produced NAC. Equilibrium isotherms of MB dye adsorption on NAC materials were acquired and the results discussed in relation to their surface chemistry. Langmuir model recorded the best interpretation of the dye adsorption data. Also, NAC was evaluated for simultaneous adsorption of six different metal ions (Fe2+, Ni2+, Mn2+, Pb2+, Cu2+, and Zn2+) that represented contaminates in petrochemical industrial wastewater. The results indicated that the extracted NAC from El-Maghara mine coal is considered as an efficient low-cost adsorbent material for remediation in both basic dyes and metal ions from the polluted solutions.

scholarly journals Geomorphic Classification and Assessment of Mangrove Degradation in the Henry’s and Patibania Island, South Western Sundarban

2020 ◽  
Vol 3 (9) ◽  
pp. 111-115
Author(s):  
Debasmrity Mukherjee ◽  
Ashis Kumar Paul
Keyword(s):  
Chemical Properties ◽  
Environmental Parameters ◽  
Bottom Current ◽  
Gis Analysis ◽  
Humid Climate ◽  
Remote Sensing Technique ◽  
Physico Chemical ◽  
Tidal Estuaries ◽  
The Relationship ◽  
Mangrove Degradation

The coast of Henry's island, extending from Saptamukhi River in the east to Bakkhali River in the West. In the hot and humid climate of the Sundarban, a negligible input of fresh water through tidal creeks, high evaporation rate at the surface area are the probable reasons behind the evolution of Hypersaline patches of Henry's and Patibunia Island. The dense salt patches develop in the abandoned portion of the surface then sinks and move out of the tidal estuaries as subterranean flow or a bottom current to make the environment more saline. Development of Saltpan is one of the major hindrances for the growth of mangroves and hampers the ecological balance of Sundarban. Present paper attempts to highlight- I) To study and identification of Geomorphological settings of both island. ii) Analysis of Physico-chemical properties of hyper saline soil. iii) Identification of hyper-saline patches and their impact on mangrove degradation. Application of remote sensing technique and GIS analysis help to find out the relationship between mangrove degradation and salinity within the islands area in the last few decades. Development of hyper saline patches and changing environmental parameters are how much responsible for the mangrove degeneration process are major issues of this paper. The Forest Department has attempted to restore the growth of mangrove and improve fragile ecosystem but without understanding the geomorphology and environmental condition, it is not possible to implement proper managemental strategies for wetland restoration process.

ON THE RELATIONSHIP BETWEEN BLOOD COMPATIBILITY AND SURFACE PHYSICO-CHEMICAL PROPERTIES OF NONTHROMBOGENIC POLYMERS

ASAIO Journal ◽  
1997 ◽  
Vol 43 (2) ◽  
pp. 2
Author(s):  
K. Uchida ◽  
C. Nojiri ◽  
M. Waki ◽  
D. Mizumoto ◽  
T. Kido ◽  
...  
Keyword(s):  
Blood Compatibility ◽  
Chemical Properties ◽  
Physico Chemical ◽  
The Relationship

scholarly journals Study of physico-chemical properties of potential beta-adrenolytics

2014 ◽  
Vol 61 (2) ◽  
pp. 49-54
Author(s):  
M. Stankovičová ◽  
Ž. Bezáková ◽  
P. Mokrý ◽  
P. Salát ◽  
M. Kočík ◽  
...  
Keyword(s):  
Partition Coefficients ◽  
Spectral Characteristics ◽  
Chemical Properties ◽  
Side Chain ◽  
Log P ◽  
Structure Activity ◽  
Physico Chemical ◽  
The Relationship ◽  
Layer Chromatography ◽  
Derivatives Of

Abstract The aim of this paper is the study of physico-chemical properties of the chosen compounds, derivatives of 2-hydroxy-3-[2-(4-methoxyphenyl) ethylamino]propyl-4-[(alkoxycarbonyl)amino]benzoates and 2-hydroxy-3-[2-(2-methoxyphenyl)ethylamino]propyl-4-[(alkoxycarbonyl) amino]benzoates with potential ultra-short beta-adrenolytic activity. The studied compounds are different in the position of the substituent on the benzene ring in the side chain as well as in the aromatic ring in position 4 with alkyl- (methylto butyl-) carbamate. The physico-chemical characteristics, for example, lipophilicity, surface activity, adsorbability, acidobasic properties etc., are very important for the explanation of the relationship between structure and biological activity of the drug. These parameters serve as the base of quantitative structure-activity study. The goal of this work is to establish the spectral characteristics of studied compounds in UV-area, pKa values, the parameters of lipophilicity (the values of Rf and RM from thin layer chromatography, retention time t´R and capacity factor k´ from liquid chromatography and experimental partition coefficients log P´ values), surface tension, critical micelle concentrations, the adsorbability of compounds expressed by percent of adsorbed compound on active charcoal β% as well as by Freundlich adsorption isotherms. The obtained values are correlated with the parameters characterising the size of molecule, for example, the number of carbon atoms on carbamate functional group.

scholarly journals Synthesis, characterization and analytical applications of chelating resin containing orcinol

2012 ◽  
Vol 14 (2) ◽  
pp. 88-96
Author(s):  
Bhavna Shah ◽  
Ajay Shah ◽  
Nayan Patel ◽  
Pathik Shah
Keyword(s):  
Metal Ions ◽  
Chemical Properties ◽  
Transition Metal Ions ◽  
Exchange Capacity ◽  
Chelating Resin ◽  
Alkaline Solutions ◽  
Analytical Applications ◽  
Physico Chemical ◽  
Chelating Sorbent ◽  
Ft Ir

Synthesis, characterization and analytical applications of chelating resin containing orcinol A chelating resin based on Salicylic acid-Formaldehyde copolymer, containing Orcinol (SFO), has been synthesized and characterized on the basis of Elemental Analysis, Particle Size Distribution, FT-IR Analysis, XRD, SEM and Optical Photographs. The Physico-Chemical properties have been studied. This resin is highly stable in acidic and alkaline solutions and has been studied as a chelating sorbent for heavy metal ions and transition metal ions. The Exchange capacity order is Ni(II) > Cu(II) > Zn(II) > Cd(II) > Pb(II). The effect of nature and concentration of different electrolytes on distribution coefficient (Kd) for metal ions have been investigated. Separation of synthetic mixtures containing Cu(II)-Pb(II), Ni(II)-Cd(II) and Brass constituents has been carried out using a column prepared from the synthesized chelating resin. The developed procedure was also tested for the removal of Cd(II) and Pb(II) from natural water of Purna River near by Navsari, Gujarat, India.

scholarly journals The Relationship between the Physico-chemical Properties of Longissimus-Rib and of Major Muscles

2006 ◽  
Vol 77 (1) ◽  
pp. 37-43
Author(s):  
Naoto NAKANISHI ◽  
Shinichi KAWAKAMI ◽  
Tomoya YAMADA ◽  
Yasuhiro AOKI
Keyword(s):  
Chemical Properties ◽  
Physico Chemical ◽  
The Relationship

scholarly journals Hybrid Methacrylated Gelatin and Hyaluronic Acid Hydrogel Scaffolds. Preparation and Systematic Characterization for Prospective Tissue Engineering Applications

2021 ◽  
Vol 22 (13) ◽  
pp. 6758
Author(s):  
B. Velasco-Rodriguez ◽  
T. Diaz-Vidal ◽  
L. C. Rosales-Rivera ◽  
C. A. García-González ◽  
C. Alvarez-Lorenzo ◽  
...  
Keyword(s):  
Tissue Engineering ◽  
Hyaluronic Acid ◽  
Engineering Application ◽  
Chemical Properties ◽  
Tissue Engineering Application ◽  
Hydrogel Scaffolds ◽  
Hybrid Hydrogels ◽  
Physico Chemical ◽  
Scaffold Structure ◽  
The Relationship

Hyaluronic acid (HA) and gelatin (Gel) are major components of the extracellular matrix of different tissues, and thus are largely appealing for the construction of hybrid hydrogels to combine the favorable characteristics of each biopolymer, such as the gel adhesiveness of Gel and the better mechanical strength of HA, respectively. However, despite previous studies conducted so far, the relationship between composition and scaffold structure and physico-chemical properties has not been completely and systematically established. In this work, pure and hybrid hydrogels of methacroyl-modified HA (HAMA) and Gel (GelMA) were prepared by UV photopolymerization and an extensive characterization was done to elucidate such correlations. Methacrylation degrees of ca. 40% and 11% for GelMA and HAMA, respectively, were obtained, which allows to improve the hydrogels’ mechanical properties. Hybrid GelMA/HAMA hydrogels were stiffer, with elastic modulus up to ca. 30 kPa, and porous (up to 91%) compared with pure GelMA ones at similar GelMA concentrations thanks to the interaction between HAMA and GelMA chains in the polymeric matrix. The progressive presence of HAMA gave rise to scaffolds with more disorganized, stiffer, and less porous structures owing to the net increase of mass in the hydrogel compositions. HAMA also made hybrid hydrogels more swellable and resistant to collagenase biodegradation. Hence, the suitable choice of polymeric composition allows to regulate the hydrogels´ physical properties to look for the most optimal characteristics required for the intended tissue engineering application.

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