scholarly journals Antimicrobial effects of zero-valent iron nanoparticles on gram-positive Bacillus strains and gram-negative Escherichia coli strains

2017 ◽  
Vol 15 (1) ◽  
Author(s):  
Yi-Huang Hsueh ◽  
Ping-Han Tsai ◽  
Kuen-Song Lin ◽  
Wan-Ju Ke ◽  
Chao-Lung Chiang
Keyword(s):  
Escherichia Coli ◽  
Iron Nanoparticles ◽  
Zero Valent Iron ◽  
Gram Positive ◽  
Gram Negative ◽  
Antimicrobial Effects ◽  
Zero Valent Iron Nanoparticles ◽  
Bacillus Strains

scholarly journals Bactericidal Effect of Zero-Valent Iron Nanoparticles on Escherichia coli

2008 ◽  
Vol 42 (13) ◽  
pp. 4927-4933 ◽  
Author(s):  
Changha Lee ◽  
Jee Yeon Kim ◽  
Won Il Lee ◽  
Kara L. Nelson ◽  
Jeyong Yoon ◽  
...  
Keyword(s):  
Escherichia Coli ◽  
Iron Nanoparticles ◽  
Bactericidal Effect ◽  
Zero Valent Iron ◽  
Zero Valent Iron Nanoparticles

scholarly journals Zero-Valent Iron Nanoparticles for Soil and Groundwater Remediation

2020 ◽  
Vol 17 (16) ◽  
pp. 5817
Author(s):  
Alazne Galdames ◽  
Leire Ruiz-Rubio ◽  
Maider Orueta ◽  
Miguel Sánchez-Arzalluz ◽  
José Luis Vilas-Vilela
Keyword(s):  
Contaminated Soils ◽  
Groundwater Remediation ◽  
Iron Nanoparticles ◽  
Environmental Issues ◽  
High Specific Surface Area ◽  
Zero Valent Iron ◽  
Pilot Studies ◽  
High Effectiveness ◽  
Nanosized Materials ◽  
Zero Valent Iron Nanoparticles

Zero-valent iron has been reported as a successful remediation agent for environmental issues, being extensively used in soil and groundwater remediation. The use of zero-valent nanoparticles have been arisen as a highly effective method due to the high specific surface area of zero-valent nanoparticles. Then, the development of nanosized materials in general, and the improvement of the properties of the nano-iron in particular, has facilitated their application in remediation technologies. As the result, highly efficient and versatile nanomaterials have been obtained. Among the possible nanoparticle systems, the reactivity and availability of zero-valent iron nanoparticles (NZVI) have achieved very interesting and promising results make them particularly attractive for the remediation of subsurface contaminants. In fact, a large number of laboratory and pilot studies have reported the high effectiveness of these NZVI-based technologies for the remediation of groundwater and contaminated soils. Although the results are often based on a limited contaminant target, there is a large gap between the amount of contaminants tested with NZVI at the laboratory level and those remediated at the pilot and field level. In this review, the main zero-valent iron nanoparticles and their remediation capacity are summarized, in addition to the pilot and land scale studies reported until date for each kind of nanomaterials.

scholarly journals Pyelonephritis in Pediatric Uropathic Patients: Differences from Community-Acquired Ones and Therapeutic Protocol Considerations. A 10-Year Single-Center Retrospective Study

Children ◽  
2021 ◽  
Vol 8 (6) ◽  
pp. 436
Author(s):  
Giovanni Parente ◽  
Tommaso Gargano ◽  
Stefania Pavia ◽  
Chiara Cordola ◽  
Marzia Vastano ◽  
...  
Keyword(s):  
Escherichia Coli ◽  
Retrospective Study ◽  
Success Rate ◽  
Pediatric Population ◽  
Gram Negative Bacteria ◽  
Gram Positive ◽  
Gram Negative ◽  
Gram Positive Bacteria ◽  
Significant Difference ◽  
Klebsiella Spp

Pyelonephritis (PN) represents an important cause of morbidity in the pediatric population, especially in uropathic patients. The aim of the study is to demonstrate differences between PNs of uropathic patients and PNs acquired in community in terms of uropathogens involved and antibiotic sensitivity; moreover, to identify a proper empiric therapeutic strategy. A retrospective study was conducted on antibiograms on urine cultures from PNs in vesicoureteral reflux (VUR) patients admitted to pediatric surgery department and from PNs in not VUR patients admitted to Pediatric Emergency Unit between 2010 and 2020. We recorded 58 PNs in 33 patients affected by VUR and 112 PNs in the not VUR group. The mean age of not VUR patients at the PN episode was 1.3 ± 2.6 years (range: 20 days of life–3 years), and almost all the urine cultures, 111 (99.1%), isolated Gram-negative bacteria and rarely, 1 (0.9%), Gram-positive bacteria. The Gram-negative uropathogens isolated were Escherichia coli (97%), Proteus mirabilis (2%), and Klebsiella spp. (1%). The only Gram-positive bacteria isolated was an Enterococcus faecalis. As regards the antibiograms, 96% of not VUR PNs responded to beta-lactams, 99% to aminoglycosides, and 80% to sulfonamides. For the VUR group, mean age was 3.0 years ± 3.0 years (range: 9 days of life–11 years) and mean number of episodes per patient was 2.0 ± 1.0 (range: 1–5); 83% of PNs were by Gram-negatives bacteria vs. 17% by Gram-positive: the most important Gram-negative bacteria were Pseudomonas aeruginosa (44%), Escherichia coli (27%), and Klebsiella spp. (12%), while Enterococcus spp. determined 90% of Gram-positive UTIs. Regimen ampicillin/ceftazidime (success rate: 72.0%) was compared to ampicillin/amikacin (success rate of 83.0%): no statistically significant difference was found (p = 0.09). The pathogens of PNs in uropathic patients are different from those of community-acquired PNs, and clinicians should be aware of their peculiar antibiotic susceptibility. An empiric therapy based on the association ampicillin + ceftazidime is therefore suggested.

Synthesis of silver and silver@zero valent iron nanoparticles using Chromolaena odorata phenolic extract for antibacterial activity and hydrogen peroxide detection

2021 ◽  
Vol 9 (3) ◽  
pp. 105224
Author(s):  
Titilope John Jayeoye ◽  
Fredrick Nwude Eze ◽  
Oladipupo Odunayo Olatunde ◽  
Soottawat Benjakul ◽  
Thitima Rujiralai
Keyword(s):  
Hydrogen Peroxide ◽  
Antibacterial Activity ◽  
Iron Nanoparticles ◽  
Zero Valent Iron ◽  
Chromolaena Odorata ◽  
Hydrogen Peroxide Detection ◽  
Phenolic Extract ◽  
Zero Valent Iron Nanoparticles

Removal of hexavalent chromium from contaminated ground water using zero-valent iron nanoparticles

2011 ◽  
Vol 184 (6) ◽  
pp. 3643-3651 ◽  
Author(s):  
Ritu Singh ◽  
Virendra Misra ◽  
Rana Pratap Singh
Keyword(s):  
Ground Water ◽  
Hexavalent Chromium ◽  
Iron Nanoparticles ◽  
Zero Valent Iron ◽  
Zero Valent Iron Nanoparticles

Anodic coulometry of zero-valent iron nanoparticles

2021 ◽  
Vol 896 ◽  
pp. 115331
Author(s):  
Annelis O. Sánchez-Álvarez ◽  
Jeffrey E. Dick ◽  
Eduardo Larios ◽  
Carlos R. Cabrera
Keyword(s):  
Iron Nanoparticles ◽  
Zero Valent Iron ◽  
Zero Valent Iron Nanoparticles
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