COMPLEX RESEARCH OF E.coli VITAL ACTIVITY DYNAMICS IN PRESENCE OF TRANSITION METAL IONS
Annotation
Subject of Research.The paper presents the study of the effect of the most stable ionic forms of the fourth period Periodic table transition metals with different concentrations on the vital activity of Еscherichia coli. Method. The research was carried out using a complex microbiotest system, which provides for instrumental recording of changes in the intensity of elastic light scattering at 520 nm(Iod), optical density at 300 nm (Auv), pH and the redox potential (E)of samples containing initially the same number of viable test microorganisms incubated in the presence and absence of various concentrations of the test substances during the predetermined time, at given temperature and in liquid nutrient medium of defined composition. Main Results. It is shown, that the most stable ionic forms of the fourth period transition metals can be arranged in the following row according to the decrement of their antimicrobial activity: Cu2+ > Ni2+ > Mn2+ > Cr3+ > Co2+ > Fe3+ > Zn2+. We have carried out a study of fine dynamics of the vital activity of test microorganisms in the presence of the mentioned metal ions. The study has demonstrated, that the maximum growth rate of E.coli (characterized by ΔIod/Δτvalues) in all cases was reached earlier than the maximum rate of change in the metabolic activity of these microorganisms (characterized by ΔE/Δτvalues), and also that in the initial incubation period ΔE/Δτchanged non-monotonically with time as a result of E.coli life activity (it probably has reflected the metabolic processes of E.coli adaptation to the presence of excess metal ions in the test medium). Practical Relevance. The results of this study can be applied in the development of various methods for assessment of the environment ecological state, as well as regulation of the vital activity of microorganisms involved in various biotechnological processes (as producers, biodegradants of various products and materials, etc.), causing various infectious diseases, being part of the beneficial microflora of various water bodies, soils and multicellular living organisms.
Keywords
Постоянный URL
Articles in current issue
- RESONANT AND NON-RESONANT INTERACTION OF SEMICONDUCTOR NANOCRYSTALS WITH LOCALIZED PLASMONS
- LIGHT PROPAGATION IN PLANAR TOTAL INTERNAL REFLECTION WAVEGUIDE WITH QUANTUM WELL
- DETECTION OF DIABETES MELLITUS TYPE II BY INFRARED SPECTROSCOPY AND MULTIVARIATE ANALYSIS
- MULTI-ROTOR UNMANNED AERIAL VEHICLE CONTROL SYSTEM BASED ON HYBRID NEUROREGULATOR
- STABILITY OF NONLINEAR DYNAMICAL SYSTEM MOTION UNDER CONSTANTLY ACTING PERTURBATIONS
- SPECTRAL AND LUMINESCENT PROPERTIES OF GLASSES DOPED WITH ERBIUM IONS BASED ON 98MgCaSrBaYAl2F14-2Ва(РО3)2
- THERMOELECTRIC COOLING MODULE WITH DAMPING CONDUCTOR ON COLD SPAYS
- CHEMICAL MECHANICAL POLISHING OF NONLINEAR OPTICAL ORGANIC CO-CRYSTALS BASED ON AMINOPYRIDINE SERIES
- MICROSTRUCTURE RESEARCH OF FLOAT-TYPE GYRO ROTORS BY SCANNING ELECTRON MICROSCOPE
- APPLICATION OF DIGITAL FACIAL ANTHROPOMETRY (Review paper)
- MODEL OF MULTI-LEVEL DATA STORAGE SYSTEM
- ORTHOGONAL NOISE-LIKE SIGNAL SYMBOLS FOR BROADBAND CHANNEL PROTECTION
- RATIONAL SELECTION OF WORK PERFORMERS FOR INFORMATION SYSTEM DESIGN PROJECTS
- CRITERIA FOR TEXT CONFORMITY TO SCIENTIFIC STYLE
- HIGH-LEVEL SYNTHESIS SYSTEM BASED ON HYBRID RECONFIGURABLE MICROARCHITECTURE
- CONTROL METHODS FOR UPPER EXTREMITY PROSTHESES
- SIGNAL FILTRATION ALGORITHMS FOR ULTRASONIC SENSORS IN OBSTACLE DETECTION DEVICES
- TRANSFER LEARNING FOR IMAGE CLASSIFICATION OF PRIMARY MORPHOLOGICAL ELEMENTS OF SKIN LESIONS
- RELATIVE ORDER OF SAMPLED LINEAR TIME-INVARIANT SYSTEMS
- PARAMETRIC IDENTIFICATION OF SHIP MODEL BY SYMMETRIC MOTIONS AROUND ROLL ANGLE WITH TAUTWIRE REFERENCE POSITION SENSOR
- STUDY OF ELECTROMAGNETIC TORQUE PULSATIONS IN PRECISION SERVO DRIVES WITH SINUSOIDAL PULSE-WIDTH MODULATION
- ULTRAVIOLET SPECTROPHOTOMETRIC METHOD AND WATER HYDROCARBON IMPURITY SENSOR
- HOLOGRAPHIC RECORDING IN PHOTOPOLYMERIZED NANOCOMPOSITE WITH DAST NANOCRYSTALS
- FLUORESCENCE ENHANCEMENT OF SCANDIUM COMPOUNDS WITH2-NAPHTHOYLTRIFLUOROACETONE IN WATER SOLUTION
- PROGRAM CODE OPTIMIZATION OF RELACY RACE DETECTOR LIBRARY