Retraction notice to “Nanosilver — The burgeoning therapeutic molecule and its green synthesis” [Biotech Adv. 27 (2009) 924–937]

Vaidyanathan, Ramanathan; Kalishwaralal, Kalimuthu; Gopalram, Shubaash; Gurunathan, Sangiliyandi

doi:10.1016/j.biotechadv.2010.08.010

Cited by 17 publications

(9 citation statements)

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“…1, inset). As several microorganisms have been shown to be capable of synthesising Ag NPs from Ag ions both intra-and extracellularly, 9 it could be assumed that T. thermophila secreted Ag + -reducing compounds into the surrounding environment. Interestingly, under the illuminated conditions the colour changes in the test environment appeared within minutes, whereas no colour change was observed in the dark even aer 7 days of incubation.…”

Section: Discussionmentioning

confidence: 99%

“…It has been proposed in the literature that the biosynthesis of Ag NPs is one of the detoxication routes for Ag ions. 10,11 Although several organisms synthesize Ag NPs intracellularly, 9 T. thermophila created an environment that reduced Ag ions to Ag NPs extracellularly. Considering the fact that Ag NPs were less toxic to T. thermophila than Ag ions and the toxicity of Ag NPs decreased with the increasing size of the particle, we attribute the formation of Ag NPs catalysed by SEF as one of the primary adaptation mechanisms of T. thermophila to toxic metal ions.…”

Section: Discussionmentioning

confidence: 99%

“…8 Specically, bacteria, fungi, algae and other organisms that are capable of synthesizing Ag NPs either intra-or extracellularly have already been successfully applied for the green synthesis of nanosilver. 9 The main driving force for NP biosynthesis by the microorganisms is presumably derived from the need for detoxication of Ag ions into insoluble, less or nontoxic nanoclusters. 10,11 Although the current focus on biosynthesis of Ag NPs has shied from empirical observations towards mechanistic studies, the exact mechanisms explaining the formation of these NPs remain to be elucidated.…”

Section: Introductionmentioning

confidence: 99%

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Extracellular conversion of silver ions into silver nanoparticles by protozoan Tetrahymena thermophila

Juganson

Mortimer

Ivask

et al. 2013

Environ. Sci.: Processes Impacts

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In the current study, cell-free exudates of the ciliated protozoan Tetrahymena thermophila were shown to progressively convert silver nitrate to silver nanoparticles (Ag NPs) under illumination at ambient temperature. The formation of Ag NPs in the reaction mixture was evidenced by gradual colour changes, appearance of a specific absorbance peak (420–450 nm) and visualization using scanning electron microscopy coupled to an energy-dispersive X-ray spectrometer. After 2 h of incubation the mean hydrodynamic size of the Ag NPs was 70 nm. Seven days of incubation resulted in larger agglomerates and a significant decrease in silver toxicity to T. thermophila, accompanied by about 100-fold reduction in the silver ion concentration. Protein analysis indicated an extensive extracellular protein binding by the Ag NPs formed in the protozoan exudates. As protozoa are important components in wastewater treatment, their ability to sequester silver ions into a less bioavailable and less toxic form of silver (e.g. NPs) may be one of the adaption mechanisms of ciliate survival in contaminated environments.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Extracellular conversion of silver ions into silver nanoparticles by protozoan Tetrahymena thermophila

Juganson

Mortimer

Ivask

et al. 2013

Environ. Sci.: Processes Impacts

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“…These have proven to be better methods due to slower kinetics and as they offer better manipulation over control of the crystal growth and their stabilization. 13 This method has motivated an increase in research into synthesis routes that could allow a better control of the size and shape for a wide variety of nanotechnological applications.…”

mentioning

confidence: 99%

Amelioration of diethylnitrosamine (DEN)-induced hepatocellular carcinogenesis in animal modelsviaknockdown oxidative stress and proinflammatory markers byMadhuca longifoliaembedded silver nanoparticles

Singh

Yadav

et al. 2018

RSC Adv.

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In hepatocellular carcinoma (HCC), primary liver cancer is primarily responsible for inflammation-related cancer as more than 90% of HCCs emerge with regard to hepatic damage and inflammation. Tenacious inflammation is known to advance and intensify liver tumours. Nanomaterials, for example, silver nanoparticles synthesized from plant-derived materials have shown great outcomes in reducing the precancerous nodules and have anticancer properties. The aim of the present investigation was to biosynthesize, characterize and evaluate the anticancer activity of nanoparticles-embedded Madhuca longifolia extract (MLAgNPs) on an experimental model of hepatic cancer in rats. M. longifolia contains a high amount of flavonoids and other phenolic derivative. The silver nanoparticles synthesized by M. longifolia were characterized by various instruments, including UV-Vis spectrophotometry, X-ray beam diffraction, field-emission scanning electron microscopy with energy dispersive X-ray analysis, transmission electron microscopy and Fourier transform infrared spectroscopy. Liver cancer was induced to 36 Wistar rats by a single dose of diethylnitrosamine (DEN) (200 mg kg À1 BW). Hepatic cancer byMLAgNPs dose-dependently limited macroscopical variation compared with the DEN-induced hepatic cancer groups. The serum and liver were taken to measure the antioxidant parameters, proinflammatory cytokines and for a histopathological study. Serum hepatic and serum non-hepatic along with inflammatory cytokines were also assessed. Reduction in the levels of proinflammatory cytokines, namely tumour necrosis factor-a, interleukin-6, interleukin-1b, nuclear factor kappa beta (NF-kB), and improved membrane-bound enzyme activity were also detected. It was found that minor morphological anomalies were identified in the histopathology analysis in the MLAgNPs-treated groups. It could be concluded that silver nanoparticles introduce an extraordinary potential for use as adjuvants in hepatic cancer treatment because of their antioxidant abilities and ability to diminish inflammation in liver tissue by attenuating the NF-kB pathway.

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“…Also, all food processing activities must be protected from direct contact with the body. Food handlers can make some efforts to avoid contamination of food by wearing clean clothes, using disposable gloves, and using food tongs when working [16]. Another step to maintain food quality remains good by storing foodstuffs in an appropriate place because contamination can occur during the food processing or through containers and food handlers that leave food at room temperature.…”

Section: Issn: 2252-8806 mentioning

confidence: 99%

Relationship of knowledge and attitude with food handling practices: A systematic review

Ernawati

Nadhifah

Muslikha

et al. 2021

IJPHS

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Foodborne disease is still a public health problem in several countries. Food handler's knowledge, attitude, and practice (KAP) are factors that are risk factors for foodborne disease incidence. The research objective was to assess the level of knowledge, attitudes, and behavior of food handlers in maintaining food hygiene using a systematic review approach. The research method used is the preferred reporting items for systematic review and meta-analyses (PRISMA) protocol approach. The article search process was accessed on PLOS ONE, Pro-Quest, and Google Scholar. A descriptive analysis was carried out on each research variable. The results obtained eight papers (100% sociodemography, 100% knowledge, 62.5% attitude, and 87.5% behavior). The mean of significant articles on sociodemographic variables was 18.5%, experience 59.38%, attitudes 13.33%, and 23.81%. There are 37.5% of the articles showed significant relationship between knowledge and attitude with food handling practice.

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Retraction notice to “Nanosilver — The burgeoning therapeutic molecule and its green synthesis” [Biotech Adv. 27 (2009) 924–937]

Cited by 17 publications

References 0 publications

Extracellular conversion of silver ions into silver nanoparticles by protozoan Tetrahymena thermophila

Extracellular conversion of silver ions into silver nanoparticles by protozoan Tetrahymena thermophila

Amelioration of diethylnitrosamine (DEN)-induced hepatocellular carcinogenesis in animal modelsviaknockdown oxidative stress and proinflammatory markers byMadhuca longifoliaembedded silver nanoparticles

Relationship of knowledge and attitude with food handling practices: A systematic review

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