A REVIEW OF PHYSICAL-CHEMICAL METHODS FOR NITROGEN REMOVAL FROM WASTEWATERS

2013 ◽  
pp. 713-719 ◽  
Author(s):  
Peter F. Atkins ◽  
Dale A. Scherger
Keyword(s):  
Nitrogen Removal ◽  
Chemical Methods ◽  
Physical Chemical

Transmission Electron Microscopy of Protein Macromolecules

1971 ◽  
Vol 29 ◽  
pp. 424-425
Author(s):  
Henry S. Slayter
Keyword(s):  
Biological Systems ◽  
Metal Vapor ◽  
Resolving Power ◽  
Electron Microscopic ◽  
Chemical Methods ◽  
Molecular Weights ◽  
The Past ◽  
Physical Chemical ◽  
Transmission Electron

Electron microscopic methods have been applied increasingly during the past fifteen years, to problems in structural molecular biology. Used in conjunction with physical chemical methods and/or Fourier methods of analysis, they constitute powerful tools for determining sizes, shapes and modes of aggregation of biopolymers with molecular weights greater than 50, 000. However, the application of the e.m. to the determination of very fine structure approaching the limit of instrumental resolving power in biological systems has not been productive, due to various difficulties such as the destructive effects of dehydration, damage to the specimen by the electron beam, and lack of adequate and specific contrast. One of the most satisfactory methods for contrasting individual macromolecules involves the deposition of heavy metal vapor upon the specimen. We have investigated this process, and present here what we believe to be the more important considerations for optimizing it. Results of the application of these methods to several biological systems including muscle proteins, fibrinogen, ribosomes and chromatin will be discussed.

Overview of Physical-Chemical Methods for Determining Aminoglycoside Antibiotics in Tissues and Fluids of Food-Producing Animals

1985 ◽  
Vol 68 (5) ◽  
pp. 1007-1013
Author(s):  
Badar Shaikh ◽  
Edward H Allen
Keyword(s):  
Liquid Chromatography ◽  
Aminoglycoside Antibiotics ◽  
Biological Matrices ◽  
Chemical Methods ◽  
Physical Chemical ◽  
Recent Developments

Abstract A survey of literature is presented dealing with physical-chemical methods for the detection and quantitation of aminoglycoside antibiotics (gentamicin, streptomycin, dihydrostreptomycin, and neomycin) that are used in food-producing animals. Recent developments in cleanup and determinative procedures, particularly liquid chromatography, for these compounds in fluids and tissues are emphasized. Little research has been done on residues in tissues compared with other biological matrices. This review also covers the chemistry, general characteristics, tolerances, and withdrawal times for the approved uses of these antibiotics in animals that are used for food.

Study of the structure of polyphenylsiloxanes containing the metal-ions by physical–chemical methods

2017 ◽  
Vol 1145 ◽  
pp. 300-308 ◽  
Author(s):  
N.P. Shapkin ◽  
V.I. Razov ◽  
V.V. Korochentsev ◽  
E.A. Tokar ◽  
S.V. Gardionov ◽  
...  
Keyword(s):  
Metal Ions ◽  
Chemical Methods ◽  
Physical Chemical

Combination of physical-chemical methods and ozonation

2019 ◽  
pp. 199-246
Author(s):  
Tatyana I. Poznyak ◽  
Isaac Chairez Oria ◽  
Alexander S. Poznyak
Keyword(s):  
Chemical Methods ◽  
Physical Chemical

State and tendency of developing physical-chemical methods for making actinide microspherical particles

1990 ◽  
Vol 143 (1) ◽  
pp. 53-60 ◽  
Author(s):  
E. A. Filippov ◽  
A. I. Karelin ◽  
O. P. Lobas ◽  
A. S. Papkov ◽  
A. N. Zhiganov ◽  
...  
Keyword(s):  
Chemical Methods ◽  
Physical Chemical

OPTIMISATION OF PHYSICAL-CHEMICAL METHODS OF NEAR-WELLBORE ZONES CONSOLIDATION IN SERBIAN OIL AND GAS FIELDS

2021 ◽  
pp. 54-62
Author(s):  
A.A. Kil’mamatov ◽  
◽  
M.M. Tripkovich ◽  
N.N. Efimov ◽  
V.I. Nozdrya ◽  
...  
Keyword(s):  
Oil And Gas ◽  
Chemical Methods ◽  
Oil And Gas Fields ◽  
Physical Chemical ◽  
Gas Fields

scholarly journals Development of processing technology and mathematical model of modification of magnesite raw material

2002 ◽  
Vol 50 ◽  
Author(s):  
MICHAL LESKO ◽  
TOMÁS BAKALÁR
Keyword(s):  
Mathematical Model ◽  
Mineral Processing ◽  
Processing Technology ◽  
Raw Material ◽  
Chemical Methods ◽  
Processing Methods ◽  
Physical Chemical ◽  
Mineralogical Properties

The application of physical and physical-chemical methods of magnesite processing related to the physical, chemical and mineralogical properties of particular magnesite types are presented in this paper. The best product qualities, achieved depending on the degree of liberalization of components contained in the magnesite, are shown. Possibilities and advantages of modelling of mineral processing methods applied to magnesite are also exemplified.

Some Physical, Chemical and Sensory Properties of Fish Oil Extracted from Fish Wastes by Physical and Chemical Methods

2021 ◽  
Vol 5 (1) ◽  
pp. 152-162
Author(s):  
Anwar Salih
Keyword(s):  
Common Carp ◽  
Physical Method ◽  
Thiobarbituric Acid ◽  
Acid Value ◽  
Sensory Properties ◽  
Acid Fermentation ◽  
Chemical Methods ◽  
Physical Chemical ◽  
Significant Difference ◽  
Physical And Chemical

This study was carried out to assess some physical, chemical and sensory properties of fish waste oil extracted by two different methods: physical (boiling) and chemical (acid fermentation). Samples of common carp viscera were collected from local markets in the city of Basrah, which included viscera of the common carp Cyprinus carpio. The most prominent and significant difference was the extraction yield which amounted to 57.14% vs 35.71% (vol./wt.) for the physical and chemical methods, respectively. Other physical properties: refraction index, specific weight, specific gravity, viscosity, cloud point and pour point, Were superior in physical method of the physical method. Measured chemical indices (free fatty acids FFA, fatty acid profile, peroxide value, iodine number and Thiobarbituric acid value TBA) indicated some variability between oil types, the most obvious was FFA which increased significantly from 0.107 to 0.205% for physical and chemical methods, respectively. The sensory tests (color and odor) were in favor of oil extracted with the physical method characterized by a light amber color and a mild fishy flavor.

Physical-Chemical Experimental Study for FGD Wastewater of Coal-Fired Power Plant

2012 ◽  
Vol 610-613 ◽  
pp. 1778-1783
Author(s):  
Lian Qing Yin ◽  
Shan Shan Zhang ◽  
Peng Kang ◽  
Hao Ning Zhao
Keyword(s):  
Experimental Study ◽  
Power Plant ◽  
Suspended Solids ◽  
Inorganic Salts ◽  
Chemical Methods ◽  
Emission Standards ◽  
Physical Chemical ◽  
Harmful Substances ◽  
Physical And Chemical

The volume of FGD wastewater of coal-fired power plant is very large, and it contains a large number of inorganic salts, suspended solids and heavy metals, the directly discharge of wastewater will cause a lot of pollution to the environment. This paper selects the FGD wastewater of Baoding power plant as a research object, it is taken experimental study by physical and chemical methods, the harmful substances in the wastewater are removed, so the quality of FGD wastewater achieves the national emission standards of sewage.

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