scholarly journals Herbicides Mechanisms Involved in the Sorption Kinetic of Ionisable and Non Ionisable Herbicides: Impact of Physical/Chemical Properties of Soils and Experimental Conditions

2019 ◽  
Author(s):  
Lizethly Caceres Jensen ◽  
Angelo Neira-Albornoz ◽  
Mauricio Escudey
Keyword(s):  
Chemical Properties ◽  
Sorption Kinetic ◽  
Experimental Conditions ◽  
Physical Chemical ◽  
Chemical Properties Of Soils

Effects of physical-chemical properties of soils on 60Co and 65Zn bioavailability

2015 ◽  
Vol 15 (11) ◽  
pp. 2232-2243 ◽  
Author(s):  
Vyacheslav Sergeevich Anisimov ◽  
Ilia Vladimirovich Kochetkov ◽  
Dmitry Vladimirovich Dikarev ◽  
Lydia Nikolaevna Anisimova ◽  
Yuri Nikolaevich Korneev
Keyword(s):  
Chemical Properties ◽  
Physical Chemical ◽  
Chemical Properties Of Soils

scholarly journals MORPHOLOGIC-GENETIC PECULIARITIES OF SOILS IN MOUNTAIN MEADOWS OF THE NORTHERN URAL

2014 ◽  
pp. 36-47
Author(s):  
Ye. V. Zhangurov ◽  
A. A. Dymov ◽  
Yu. A. Dobrovskiy
Keyword(s):  
Chemical Properties ◽  
Physical Chemical ◽  
Different Types ◽  
Mountain Meadows ◽  
Chemical Properties Of Soils

The peculiar morphology and physical-chemical properties of soils in mountain meadows of the Northern Ural are shown. From the position of the latest “Classification and Diagnostics of Soils in Russia” (2004) these soils are referred to 3 different types including the gray-humus (trunk of organo-accumulative soils), illuvial-humus-ferruginous soddy podburs (trunk of Al-humus soils) and gray-humus litozems (trunk of litozems)

scholarly journals Ionic balance of water and physical-chemical properties of soil from marine shrimp farms of the Jaguaruna interior county, Ceará, Brazil

2020 ◽  
Vol 21 ◽  
Author(s):  
Francisco Hiago Gadelha Moreira ◽  
Francisco Roberto dos Santos Lima ◽  
Davi de Holanda Cavalcante ◽  
Marcelo Vinícius do Carmo e Sá
Keyword(s):  
Chemical Properties ◽  
Specific Conductance ◽  
Soil Samples ◽  
Total Alkalinity ◽  
Ionic Balance ◽  
Physical Chemical ◽  
Water And Soil Samples ◽  
Chemical Properties Of Soils ◽  
Shrimp Farms ◽  
Well Waters

Abstract The present work aimed at describing and characterizing the physical-chemical composition and the Na+: K+ and Ca+2: Mg+2 ratios of well waters used to fill L. vannamei culture ponds, belonging to farms located in Jaguaruana, an interior municipality of the State of Ceará, Brazil. Besides that, the study also sought to describe and characterize the physical-chemical properties of soils from the same shrimp farms. Well water and soil samples were taken in four farms, three located in Jaguaruana (Pasta Branca, Sargento and Poró) and one in the municipality of Aracati, which served as a control. Water samples were analyzed for pH, specific conductance, salinity, total alkalinity, total and calcium hardness, potassium and sodium. Soil samples were analyzed for pH, specific conductance, salinity, potential acidity, phosphorus, organic carbon, total nitrogen, sodium and potassium. The well waters from Aracati, Pasta Branca/Sargento and Poró were classified as euhaline, oligohaline and mesohaline, respectively. The results of pH indicated that liming was necessary in all four farms. All well waters demanded potassium fertilization to compensate for K+ deficiency and to adjust Na: K ratio. It has been concluded that, in the productive management of inland shrimp farms, it is important to monitor not only the Na: K and Ca: Mg ratios of the water, but also the absolute concentrations of each ion.

scholarly journals Combined Analytical Approaches to Standardize and Characterize Biomaterials Formulations: Application to Chitosan-Gelatin Cross-Linked Hydrogels

Biomolecules ◽  
2021 ◽  
Vol 11 (5) ◽  
pp. 683
Author(s):  
Sofia Magli ◽  
Lorenzo Rossi ◽  
Cesare Consentino ◽  
Sabrina Bertini ◽  
Francesco Nicotra ◽  
...  
Keyword(s):  
Extracellular Matrix ◽  
Hybrid Material ◽  
Chemical Properties ◽  
Structural Complexity ◽  
Experimental Conditions ◽  
Physical Chemical ◽  
Hybrid Hydrogels ◽  
Ft Ir ◽  
Analytical Approaches

A protocol based on the combination of different analytical methodologies is proposed to standardize the experimental conditions for reproducible formulations of hybrid hydrogels. The final hybrid material, based on the combination of gelatin and chitosan functionalized with methylfuran and cross-linked with 4-arm-PEG-maleimide, is able to mimic role, dynamism, and structural complexity of the extracellular matrix. Physical–chemical properties of starting polymers and finals constructs were characterized exploiting the combination of HP-SEC-TDA, UV, FT-IR, NMR, and TGA.

Chlorinated Organics in Nearshore Waters and Tributaries of the St. Clair River

1986 ◽  
Vol 21 (3) ◽  
pp. 344-350 ◽  
Author(s):  
Barry G. Oliver ◽  
Klaus L.E. Kaiser
Keyword(s):  
United States ◽  
Suspended Sediment ◽  
Waste Disposal ◽  
Large Volume ◽  
Water Samples ◽  
Chemical Properties ◽  
Low Level ◽  
Chemical Company ◽  
Physical Chemical ◽  
The Individual

Abstract The concent rat ions of hexachloroethane (HCE), hexachlorobutadiene (HCBD), pentachlorobenzene (QCB), hexachlorobenzene (HCB) and octachlorostyrene (OCS) in large volume water samples show that the major sources of these chemicals to the St. Clair River are Dow Chemical Company effluents and, to a lesser degree, Sarnia’s Township ditch which drains one of Dow’s waste disposal sites. Tributaries entering the river on both sides of the Canada/United States border contain measurable concentrations of these chemicals indicating low level contamination throughout the area. The degree of water/suspended sediment partitioning of the chemicals (Kp) was studied. Kp values for the individual chemicals changed in a manner consistent with changes in their physical-chemical properties.

Polymer-Graphene Nanoassemblies and their Applications in Cancer Theranostics

2020 ◽  
Vol 20 (11) ◽  
pp. 1340-1351 ◽  
Author(s):  
Ponnurengam M. Sivakumar ◽  
Matin Islami ◽  
Ali Zarrabi ◽  
Arezoo Khosravi ◽  
Shohreh Peimanfard
Keyword(s):  
Mechanical Stability ◽  
Chemical Properties ◽  
The Other ◽  
Hydrophilic Polymer ◽  
Two Dimensional ◽  
Normal Tissues ◽  
Physical Chemical ◽  
Anti Cancer ◽  
Good Biocompatibility ◽  
Cancer Theranostics

Background and objective: Graphene-based nanomaterials have received increasing attention due to their unique physical-chemical properties including two-dimensional planar structure, large surface area, chemical and mechanical stability, superconductivity and good biocompatibility. On the other hand, graphene-based nanomaterials have been explored as theranostics agents, the combination of therapeutics and diagnostics. In recent years, grafting hydrophilic polymer moieties have been introduced as an efficient approach to improve the properties of graphene-based nanomaterials and obtain new nanoassemblies for cancer therapy. Methods and results: This review would illustrate biodistribution, cellular uptake and toxicity of polymergraphene nanoassemblies and summarize part of successes achieved in cancer treatment using such nanoassemblies. Conclusion: The observations showed successful targeting functionality of the polymer-GO conjugations and demonstrated a reduction of the side effects of anti-cancer drugs for normal tissues.

scholarly journals Shellfish Chitosan Potential in Wine Clarification

2021 ◽  
Vol 11 (10) ◽  
pp. 4417
Author(s):  
Veronica Vendramin ◽  
Gaia Spinato ◽  
Simone Vincenzi
Keyword(s):  
Molecular Structure ◽  
Chemical Properties ◽  
Allergic Reactions ◽  
Chitin Content ◽  
Deacetylation Degree ◽  
Physical Chemical ◽  
Similar Chemical ◽  
Fungal Chitosan ◽  
Significant Difference ◽  
Fish Industry

Chitosan is a chitin-derived fiber, extracted from the shellfish shells, a by-product of the fish industry, or from fungi grown in bioreactors. In oenology, it is used for the control of Brettanomyces spp., for the prevention of ferric, copper, and protein casse and for clarification. The International Organisation of Vine and Wine established the exclusive utilization of fungal chitosan to avoid the eventuality of allergic reactions. This work focuses on the differences between two chitosan categories, fungal and animal chitosan, characterizing several samples in terms of chitin content and degree of deacetylation. In addition, different acids were used to dissolve chitosans, and their effect on viscosity and on the efficacy in wine clarification were observed. The results demonstrated that even if fungal and animal chitosans shared similar chemical properties (deacetylation degree and chitin content), they showed different viscosity depending on their molecular weight but also on the acid used to dissolve them. A significant difference was discovered on their fining properties, as animal chitosans showed a faster and greater sedimentation compared to the fungal ones, independently from the acid used for their dissolution. This suggests that physical–chemical differences in the molecular structure occur between the two chitosan categories and that this significantly affects their technologic (oenological) properties.

scholarly journals Electrospinning: A promising technique for drug delivery systems

2020 ◽  
Vol 59 (1) ◽  
pp. 441-454
Author(s):  
Carlos A. Martínez-Pérez
Keyword(s):  
Drug Delivery ◽  
Drug Delivery Systems ◽  
Chemical Properties ◽  
Delivery Systems ◽  
Extrinsic Factor ◽  
Promising Technique ◽  
Physical Chemical ◽  
Set Up ◽  
Final System ◽  
Intense Research

AbstractIn the last years, electrospinning has become a technique of intense research to design and fabricate drug delivery systems (DDS), during this time a vast variety of DDS with mainly electrospun polymers and many different active ingredient(s) have been developed, many intrinsic and extrinsic factor have influence in the final system, there are those that can be attributed to the equipment set up and that to the physical-chemical properties of the used materials in the fabrication of DDS. After all, this intense research has generated a great amount of DDS loaded with one or more drugs. In this manuscript a review with the highlights of different kind of systems for drug delivery systems is presented, it includes the basic concepts of electrospinning, types of equipment set up, polymer/drug systems, limitations and challenges that need to be overcome for clinical applications.

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