Denitrification characteristics and pathways of a facultative anaerobic denitrifying strain, Pseudomonas denitrificans G1

2020 ◽  
Vol 129 (6) ◽  
pp. 715-722 ◽  
Author(s):  
Zhao Chen ◽  
Yuli Jiang ◽  
Zhiqiang Chang ◽  
Jiajia Wang ◽  
Xiefa Song ◽  
...  
2005 ◽  
Vol 49 (1) ◽  
pp. 170-175 ◽  
Author(s):  
Åsa Sullivan ◽  
Aino Fianu-Jonasson ◽  
Britt-Marie Landgren ◽  
Carl Erik Nord

ABSTRACT The knowledge of the effects of antimicrobial agents on the normal vaginal microflora is limited. The objective of the present study was to study the ecological impact of pivmecillinam on the normal vaginal microflora. In 20 healthy women, the estimated day of ovulation was determined during three subsequent menstrual cycles. Microbiological and clinical examinations were performed on the estimated day of ovulation and on day 3 in all cycles and also on day 7 after ovulation in cycles 1 and 2. Anaerobic and facultative anaerobic gram-positive rods, mainly species of lactobacilli and actinomycetes, dominated the microflora. One woman was colonized on the third day of administration with a resistant Escherichia coli strain, and Candida albicans was detected in one woman on days 3 and 7 in cycle 2. No other major changes in the normal microflora occurred during the study. Administration of pivmecillinam had a minor ecological impact on the normal vaginal microflora.


2011 ◽  
Vol 356-360 ◽  
pp. 161-164
Author(s):  
Cai Xiang Gu ◽  
Xiao Ming Zhao ◽  
Yan Sheng Yin ◽  
Gui Jun Ji

Advantage strains SRB and V.natriegens were obtained from the China East Sea for this study. Polarization curves, corrosion potential, scanning electron microscopy (SEM) and energy dispersive spectroscopy (EDS) analyses were adopted in order to investigate the corrosion behaviors of 0Cr18Ni9 stainless steel under the combination action of anaerobic SRB and facultative anaerobic V.natriegens, The characteristics and mechanisms of microbial corrosion action in sea water were analyzed in this paper. The results show that SRB and V.natriegens promote each other’s growth when cultivated in the mixed microbe medium, in which the rate of corrosion is higher than that in the single microbe; Under the combined action of the mixed microbe, the microbial film gets wider and thicker, and corrosion products and metabolite are produced, which furthermore accelerates the passivation and pit corrosion to the 0Cr18Ni9 stainless steel.


2018 ◽  
Vol 250 ◽  
pp. 03004 ◽  
Author(s):  
A Faisal Alshalif ◽  
JM Irwan ◽  
N Othman ◽  
Adel Al-Gheethi ◽  
Algaifi Hassan ◽  
...  

The present study aimed to investigate the potential of bacterial strains from cement kiln dust (CKD) to sequestrate atmospheric CO2 into aerated concrete as a functional for carbonic anhydrase (CA) and urease enzymes. Five samples of CKD was collected from Cement Industries of Malaysia Berhad (CIMA). The most potent bacterial isolates were selected and adapted to grow in 5% of CO2 and in bio-aerated concrete medium. CA enzyme was detected by using a solution of 1.8 g of p-NPA (p-nitrophenyl acetate) and 25 mg of ampicillin at 7-pH. The results of thioglycolate broth medium assay indicated that the bacterial isolates were facultative anaerobic. Furthermore, the results of candle jar test reflected that the bacterial isolates have the ability to survive with 5% of CO2 concentrations. Two bacterial isolates distinctly grow in bio-aerated concrete simulation medium, while only one bacterial isolate was the most potent and has produced in a powder form using freeze dryer to be ready to apply in bio-aerated concrete.


Author(s):  
Siti Nur Ridhwah Muhamed Ramli ◽  
Tengku Elida Tengku Zainal Mulok ◽  
Sabiha Hanim Mohd Salleh ◽  
Khalilah Abdul Khalil ◽  
Othman Ahmad ◽  
...  

2021 ◽  
Vol 10 (41) ◽  
Author(s):  
W. E. Moore ◽  
G. K. K. Lai ◽  
S. D. J. Griffin ◽  
F. C. C. Leung

Kosakonia cowanii is a Gram-negative, motile, facultative anaerobic enterobacterium that is found in soil, water, and sewage. K. cowanii SMBL-WEM22 is a halotolerant strain that was isolated from seawater in Hong Kong. The complete genome of SMBL-WEM22 (5,037,617 bp, with a GC content of 55.02%) was determined by hybrid assembly of short- and long-read DNA sequences.


2019 ◽  
Vol 24 (2) ◽  
pp. 147-157
Author(s):  
Anthony R. Ariza González ◽  
Alfredo De jesus Jarma Orozco ◽  
Jazmín V Pérez Pazos ◽  
Diana B Sánchez López

Una alternativa para disminuir el efecto de la fertilización química en los suelos y favorecer el crecimiento de los cultivos de batata es la incorporación de microorganismos promotores de crecimiento vegetal en la fertilización. En el Caribe Colombiano actualmente, la batata es uno de los cultivos emergentes debido a sus altas propiedades nutritivas en la dieta humana. El objetivo de este estudio fue evaluar el efecto de dos cepas bacterianas Pseudomonas denitrificans IBVS2  y Azotobacter vinelandii IBVS13 en el rendimiento de batata clon Tainung 66 en condiciones de campo, en el Valle del Sinú, Córdoba, Colombia.  La investigación se desarrolló en segundo semestre del 2017, en el Centro de Investigación Turipaná-Agrosavia, utilizando esquejes apicales del clon Tainung 66, donde se implementó un diseño en bloques completos al azar con un arreglo factorial 3x2+2, evaluando variables del componente fisiológico, análisis químico foliar y edáfico, rendimiento y composición bromatológica. Los resultados mostraron que las variables rendimiento y masa seca radicular presentaron diferencias significativas con respecto al testigo químico cuando se implementó la fertilización empleando la cepa IBVS2 más 50% del fertilizante químico, obteniendo un rendimiento de 11,32 t.ha-1 y  5,78 t.ha-1 respectivamente. Estos resultados demuestran que la inoculación de PGPRs constituye una alternativa en el cultivo de batata, con efectos positivos al compararlo con la práctica de fertilización química completa.


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