Shahla Soltani - Academia.edu (original) (raw)
Papers by Shahla Soltani
International journal of basic science in medicine, Feb 14, 2018
Introduction Human breast milk is the best food for infants because it fulfills all the nutrition... more Introduction Human breast milk is the best food for infants because it fulfills all the nutritional requirements for them, additionally; it educates the infant immunity functions and confers a certain degree of protection against infectious diseases. 1 These effects seem a result of the action of many bioactive molecules, present in breast milk, including different antimicrobial compounds, immunoglobulins, and immune cells. 2,3 The breast milk contains prebiotic substances that preserve the beneficiary bacteria in the infant gut. 3,4 Human breast milk is constituted from several bacterial species, such as Staphylococci, Streptococci, Micrococci, Lactobacilli, Enterococci, Lactococci and Bifidobacteria. 5,6 Biosurfactants are heterogeneous amphipathic surface active molecules that belong to a wide range of chemical classes. These are mostly excreted by microorganisms outside the cells, and in some cases attached to the cells. 7 Microbial biosurfactants produced by a wide variety of microorganisms, have a lower toxicity and a higher biodegradability than chemical surfactants. They are also effective at extreme conditions regarding temperatures, pH and saline concentration. Microbial surfactants play an important role in a wide variety of industrial and biotechnological applications such as agriculture, foodprocessing, cosmetics and medical fields as antibacterial, antifungal and antiviral
![Research paper thumbnail of Poly(4-vinylpyridine) Catalyzed Synthesis and Characterization of Pyrano[2,3-d]pyrimidine Derivatives as Potent Antibacterial Agents](https://attachments.academia-assets.com/108420963/thumbnails/1.jpg)
](Current Bioactive Compounds, 2018
Geomicrobiology Journal, 2023
Heavy metal contaminated sites are the potential source of metal resistance microorganisms. The ... more Heavy metal contaminated sites are the potential source of metal resistance microorganisms. The
major focus of this study is to isolate and identify copper ions resistant Pseudomonas from the soil
samples collected from mining and refining sites of Sarcheshmeh copper mine in the Kerman
Province of Iran and investigate on possible mechanisms for copper resistance. Isolates were
selected based on high level of copper ions resistance. The screened isolate was identified as
Pseudomonas putida Cu-2 by morphological, biochemical and 16S rDNA gene sequencing analysis.
A high degree of copper ions resistance associated with multiple antibiotic resistances was also
detected in the screened isolate. The growth pattern of screened isolate with all the studied Cu
concentrations was similar to that of control (without Cu ions) indicating that Cu ions would not
affect the growth of isolated strain. A decrease in the amount of exopolysaccharides (EPS) was
detected after Cu ions – P. Putida Cu-2 culture supernatant interaction. The Fourier transform infrared
spectroscopy (FT-IR) peaks for the EPS extracted from the bacterial culture supernatant and
the interacted Cu ions were nearly similar. The EPS covering of the Cu ions was established by FTIR.
The study of bacterial EPS covered Cu ions with E. coli PTCC 1338 and S. aureus PTCC 1113
exhibited less toxicity compared to uncoated Cu ions. The presence of copA gene that encodes
for the multi-copper oxidase was investigated in the selected strain. The present study suggests
that the capping of Cu ions by bacterially produced EPS and the presence of copA gene serve as
the probable mechanisms of copper resistance.
World Journal of Microbiology and Biotechnology, 2014
The present study deals with isolation and characterization of copper oxide nanoparticles resista... more The present study deals with isolation and characterization of copper oxide nanoparticles resistant Pseudomonas strains that were isolated from the soil collected from mining and refining sites of Sarcheshmeh copper mine in the Kerman Province of Iran. The three isolates were selected based on high level of copper oxide nanoparticles (CuO NPs) resistance. The isolates were authentically identified as Pseudomonas fluorescens CuO-1, Pseudomonas fluorescens CuO-2 and Pseudomonas sp. CuO-3 by morphological, biochemical and 16S rDNA gene sequencing analysis. The growth pattern of these isolates with all the studied CuO NPs concentrations was similar to that of control (without CuO NPs) indicating that CuO NPs would not affect the growth of isolated strains. A reduction in the amount of exopolysaccharides was observed after CuO NPs-P. fluorescens CuO-1 culture supernatant interaction. The Fourier transform infrared spectroscopy (FT-IR) peaks for the exopolysaccharides extracted from the bacterial culture supernatant and the interacted CuO NPs were almost similar. The exopolysaccharide capping of the CuO NPs was confirmed by FT-IR and X-ray diffraction analysis. The study of bacterial exopolysaccharides capped CuO NPs with E. coli PTCC 1338 and S. aureus PTCC 1113 showed less toxicity compared to uncoated CuO NPs. Our study suggests that the capping of nanoparticles by bacterially produced exopolysaccharides serve as the probable mechanism of tolerance.
Geomicrobiology Journal, Mar 31, 2019
Abstract Many types of researches have been carried out on sandy soils to improve the fertility t... more Abstract Many types of researches have been carried out on sandy soils to improve the fertility through bacteria. In this regard, after measuring the activity of urease enzymes in urea bacterial sediments, calcium carbonate was applied in Sirjan soil (southeast of Iran), and the native bacteria of this soil were isolated. The strains of these microorganisms, because of the Come and aridity in the region and the severity of the environmental conditions in the area, have a greater resistance to chemical and physical factors and are compatible with the environment of this region. In this study, we tried to use two types of soil bacteria: one is Sporosaercina pasturii, many researchers have been working on this bacterium and the effects of soil improvement, and another is the native bacterium found in Sirjan soil (Acinetobacter calcoaceticus strain Nima). Thirty samples were taken in the same conditions and experiments to evaluate the use of native bacteria of Sirjan in soil remediation by direct shear testing, seismic electronic microscopy, and microscopic scanning (SEM) were performed on the samples. The treatment period for this study was 28 days. The results showed that the angle of internal friction increased for the treated A. calcoaceticus Nima (42%) and S. paturii (39%) compared to untreated samples. Also, adhesion between particles increased by 14.5 times for A. calcoaceticus Nima and 13.5 times for S. paturii. Finally, shear strength for soil treatment increased by4.6 times for A. calcoaceticus Nima and 3.9 times for S. pasturii. The use of indigenous strains in the natural environment due to the adaptation of strains to environmental conditions can increase the production of bio-cementation. It is, therefore, possible to use native bacteria for biologically improved soil as an appropriate alternative rather than traditional methods due to environmental problems.
The present study deals with isolation and characterization of copper oxide nanoparticles resista... more The present study deals with isolation and characterization of copper oxide nanoparticles resistant Pseudomonas strains that were isolated from the soil collected from mining and refining sites of Sarcheshmeh copper mine in the Kerman Province of Iran. The three isolates were selected based on high level of copper oxide nanoparticles (CuO NPs) resistance. The isolates were authentically identified as Pseudomonas fluorescens CuO-1, Pseudomonas fluorescens CuO-2 and Pseudomonas sp. CuO-3 by morphological, biochemical and 16S rDNA gene sequencing analysis. The growth pattern of these isolates with all the studied CuO NPs concentrations was similar to that of control (without CuO NPs) indicating that CuO NPs would not affect the growth of isolated strains. A reduction in the amount of exopolysaccharides was observed after CuO NPs-P. fluorescens CuO-1 culture supernatant interaction. The Fourier transform infrared spectroscopy (FT-IR) peaks for the exopolysaccharides extracted from the bacterial culture supernatant and the interacted CuO NPs were almost similar. The exopolysaccharide capping of the CuO NPs was confirmed by FT-IR and X-ray diffraction analysis. The study of bacterial exopolysaccharides capped CuO NPs with E. coli PTCC 1338 and S. aureus PTCC 1113 showed less toxicity compared to uncoated CuO NPs. Our study suggests that the capping of nanoparticles by bacterially produced exopolysaccharides serve as the probable mechanism of tolerance.
Biological Journal of Microorganism, 2014
Arabian Journal of Geosciences
World Journal of Microbiology and Biotechnology (Formerly MIRCEN Journal of Applied Microbiology and Biotechnology)
The present study deals with isolation and characterization of copper oxide nanoparticles resista... more The present study deals with isolation and characterization of copper oxide nanoparticles resistant Pseudomonas strains that were isolated from the soil collected from mining and refining sites of Sarcheshmeh copper mine in the Kerman Province of Iran. The three isolates were selected based on high level of copper oxide nanoparticles (CuO NPs) resistance. The isolates were authentically identified as Pseudomonas fluorescens CuO-1, Pseudomonas fluorescens CuO-2 and Pseudomonas sp. CuO-3 by morphological, biochemical and 16S rDNA gene sequencing analysis. The growth pattern of these isolates with all the studied CuO NPs concentrations was similar to that of control (without CuO NPs) indicating that CuO NPs would not affect the growth of isolated strains. A reduction in the amount of exopolysaccharides was observed after CuO NPs-P. fluorescens CuO-1 culture supernatant interaction. The Fourier transform infrared spectroscopy (FT-IR) peaks for the exopolysaccharides extracted from the b...
Biological Journal of Microorganism, Nov 15, 2014
International journal of basic science in medicine, Feb 14, 2018
Introduction Human breast milk is the best food for infants because it fulfills all the nutrition... more Introduction Human breast milk is the best food for infants because it fulfills all the nutritional requirements for them, additionally; it educates the infant immunity functions and confers a certain degree of protection against infectious diseases. 1 These effects seem a result of the action of many bioactive molecules, present in breast milk, including different antimicrobial compounds, immunoglobulins, and immune cells. 2,3 The breast milk contains prebiotic substances that preserve the beneficiary bacteria in the infant gut. 3,4 Human breast milk is constituted from several bacterial species, such as Staphylococci, Streptococci, Micrococci, Lactobacilli, Enterococci, Lactococci and Bifidobacteria. 5,6 Biosurfactants are heterogeneous amphipathic surface active molecules that belong to a wide range of chemical classes. These are mostly excreted by microorganisms outside the cells, and in some cases attached to the cells. 7 Microbial biosurfactants produced by a wide variety of microorganisms, have a lower toxicity and a higher biodegradability than chemical surfactants. They are also effective at extreme conditions regarding temperatures, pH and saline concentration. Microbial surfactants play an important role in a wide variety of industrial and biotechnological applications such as agriculture, foodprocessing, cosmetics and medical fields as antibacterial, antifungal and antiviral
Current Bioactive Compounds, 2018
Geomicrobiology Journal, 2023
Heavy metal contaminated sites are the potential source of metal resistance microorganisms. The ... more Heavy metal contaminated sites are the potential source of metal resistance microorganisms. The
major focus of this study is to isolate and identify copper ions resistant Pseudomonas from the soil
samples collected from mining and refining sites of Sarcheshmeh copper mine in the Kerman
Province of Iran and investigate on possible mechanisms for copper resistance. Isolates were
selected based on high level of copper ions resistance. The screened isolate was identified as
Pseudomonas putida Cu-2 by morphological, biochemical and 16S rDNA gene sequencing analysis.
A high degree of copper ions resistance associated with multiple antibiotic resistances was also
detected in the screened isolate. The growth pattern of screened isolate with all the studied Cu
concentrations was similar to that of control (without Cu ions) indicating that Cu ions would not
affect the growth of isolated strain. A decrease in the amount of exopolysaccharides (EPS) was
detected after Cu ions – P. Putida Cu-2 culture supernatant interaction. The Fourier transform infrared
spectroscopy (FT-IR) peaks for the EPS extracted from the bacterial culture supernatant and
the interacted Cu ions were nearly similar. The EPS covering of the Cu ions was established by FTIR.
The study of bacterial EPS covered Cu ions with E. coli PTCC 1338 and S. aureus PTCC 1113
exhibited less toxicity compared to uncoated Cu ions. The presence of copA gene that encodes
for the multi-copper oxidase was investigated in the selected strain. The present study suggests
that the capping of Cu ions by bacterially produced EPS and the presence of copA gene serve as
the probable mechanisms of copper resistance.
World Journal of Microbiology and Biotechnology, 2014
The present study deals with isolation and characterization of copper oxide nanoparticles resista... more The present study deals with isolation and characterization of copper oxide nanoparticles resistant Pseudomonas strains that were isolated from the soil collected from mining and refining sites of Sarcheshmeh copper mine in the Kerman Province of Iran. The three isolates were selected based on high level of copper oxide nanoparticles (CuO NPs) resistance. The isolates were authentically identified as Pseudomonas fluorescens CuO-1, Pseudomonas fluorescens CuO-2 and Pseudomonas sp. CuO-3 by morphological, biochemical and 16S rDNA gene sequencing analysis. The growth pattern of these isolates with all the studied CuO NPs concentrations was similar to that of control (without CuO NPs) indicating that CuO NPs would not affect the growth of isolated strains. A reduction in the amount of exopolysaccharides was observed after CuO NPs-P. fluorescens CuO-1 culture supernatant interaction. The Fourier transform infrared spectroscopy (FT-IR) peaks for the exopolysaccharides extracted from the bacterial culture supernatant and the interacted CuO NPs were almost similar. The exopolysaccharide capping of the CuO NPs was confirmed by FT-IR and X-ray diffraction analysis. The study of bacterial exopolysaccharides capped CuO NPs with E. coli PTCC 1338 and S. aureus PTCC 1113 showed less toxicity compared to uncoated CuO NPs. Our study suggests that the capping of nanoparticles by bacterially produced exopolysaccharides serve as the probable mechanism of tolerance.
Geomicrobiology Journal, Mar 31, 2019
Abstract Many types of researches have been carried out on sandy soils to improve the fertility t... more Abstract Many types of researches have been carried out on sandy soils to improve the fertility through bacteria. In this regard, after measuring the activity of urease enzymes in urea bacterial sediments, calcium carbonate was applied in Sirjan soil (southeast of Iran), and the native bacteria of this soil were isolated. The strains of these microorganisms, because of the Come and aridity in the region and the severity of the environmental conditions in the area, have a greater resistance to chemical and physical factors and are compatible with the environment of this region. In this study, we tried to use two types of soil bacteria: one is Sporosaercina pasturii, many researchers have been working on this bacterium and the effects of soil improvement, and another is the native bacterium found in Sirjan soil (Acinetobacter calcoaceticus strain Nima). Thirty samples were taken in the same conditions and experiments to evaluate the use of native bacteria of Sirjan in soil remediation by direct shear testing, seismic electronic microscopy, and microscopic scanning (SEM) were performed on the samples. The treatment period for this study was 28 days. The results showed that the angle of internal friction increased for the treated A. calcoaceticus Nima (42%) and S. paturii (39%) compared to untreated samples. Also, adhesion between particles increased by 14.5 times for A. calcoaceticus Nima and 13.5 times for S. paturii. Finally, shear strength for soil treatment increased by4.6 times for A. calcoaceticus Nima and 3.9 times for S. pasturii. The use of indigenous strains in the natural environment due to the adaptation of strains to environmental conditions can increase the production of bio-cementation. It is, therefore, possible to use native bacteria for biologically improved soil as an appropriate alternative rather than traditional methods due to environmental problems.
The present study deals with isolation and characterization of copper oxide nanoparticles resista... more The present study deals with isolation and characterization of copper oxide nanoparticles resistant Pseudomonas strains that were isolated from the soil collected from mining and refining sites of Sarcheshmeh copper mine in the Kerman Province of Iran. The three isolates were selected based on high level of copper oxide nanoparticles (CuO NPs) resistance. The isolates were authentically identified as Pseudomonas fluorescens CuO-1, Pseudomonas fluorescens CuO-2 and Pseudomonas sp. CuO-3 by morphological, biochemical and 16S rDNA gene sequencing analysis. The growth pattern of these isolates with all the studied CuO NPs concentrations was similar to that of control (without CuO NPs) indicating that CuO NPs would not affect the growth of isolated strains. A reduction in the amount of exopolysaccharides was observed after CuO NPs-P. fluorescens CuO-1 culture supernatant interaction. The Fourier transform infrared spectroscopy (FT-IR) peaks for the exopolysaccharides extracted from the bacterial culture supernatant and the interacted CuO NPs were almost similar. The exopolysaccharide capping of the CuO NPs was confirmed by FT-IR and X-ray diffraction analysis. The study of bacterial exopolysaccharides capped CuO NPs with E. coli PTCC 1338 and S. aureus PTCC 1113 showed less toxicity compared to uncoated CuO NPs. Our study suggests that the capping of nanoparticles by bacterially produced exopolysaccharides serve as the probable mechanism of tolerance.
Biological Journal of Microorganism, 2014
Arabian Journal of Geosciences
World Journal of Microbiology and Biotechnology (Formerly MIRCEN Journal of Applied Microbiology and Biotechnology)
The present study deals with isolation and characterization of copper oxide nanoparticles resista... more The present study deals with isolation and characterization of copper oxide nanoparticles resistant Pseudomonas strains that were isolated from the soil collected from mining and refining sites of Sarcheshmeh copper mine in the Kerman Province of Iran. The three isolates were selected based on high level of copper oxide nanoparticles (CuO NPs) resistance. The isolates were authentically identified as Pseudomonas fluorescens CuO-1, Pseudomonas fluorescens CuO-2 and Pseudomonas sp. CuO-3 by morphological, biochemical and 16S rDNA gene sequencing analysis. The growth pattern of these isolates with all the studied CuO NPs concentrations was similar to that of control (without CuO NPs) indicating that CuO NPs would not affect the growth of isolated strains. A reduction in the amount of exopolysaccharides was observed after CuO NPs-P. fluorescens CuO-1 culture supernatant interaction. The Fourier transform infrared spectroscopy (FT-IR) peaks for the exopolysaccharides extracted from the b...
Biological Journal of Microorganism, Nov 15, 2014