Synthesis and characterization of silver-chitosan nanoparticles on textile

Metal nanoparticles these times have gathered huge popularity in the fields of health industry. This study focuses on synthesis of silver and chitosan nanoparticles and study their antibacterial effects and cytotoxicity when they are coated on a fabric. The prepared fabric was subjected to characterization techniques such as XPS, XRD, EDX and SEM. These tests confirmed the presence of silver nanoparticles on the surface of the fabric. Antibacterial and cytotoxicity tests were conducted, and the results exhibited that silver nanoparticles have showed good antibacterial effect on both gram positive and gram-negative bacteria and showed no cytotoxicity. The antibacterial effect was effective after 10 cycles of washing.t PLASMAMED - PTDC/CTM-TEX/28295/2017 fnanced by FCT, FEDER and POCI in the frame of the Portugal 2020 program, the project UID/CTM/00264/2019 of 2C2T under the COMPETE and FCT/MCTES (PIDDAC) co-fnanced by FEDER through the PT2020 progra

Ex-situ and in-situ post-photosynthesis of silver nanoparticles on polyamide fabric using daylight irradiation

Silver nanoparticles (AgNPs) have been ex-situ post-synthesized in an aqueous solution and in-situ synthesized on polyamide fabric through a simple chemical reduction method by using silver nitrate (AgNO3), stannous chloride (SnCl2) and cetyltrimethylammonium bromide (CTAB) under daylight irradiation. SnCl2 and CTAB act as reducing and stabilizing agents in the colloidal silver nanoparticles solution respectively. Post in-situ synthesis of Ag NPs have been carried out on polyamide fabric by spraying solution of AgNO3, CTAB and SnCl2 on the fabric and then irradiating under daylight for 2 h. Ag NPs solutions and Ag NPs loaded polyamide fabrics are characterized by UV-vis spectroscopy, dynamic light scattering (DLS), X-ray diffraction (XRD) and scanning electron microscopy (SEM). Appearing a strong plasmon resonance peak at 400 nm in UV-visible spectrum, XRD patterns and SEM images are found to clearly confirm the formation of silver nanoparticles. The UV-vis spectra also confirm no Ag NPs formation without daylight irradiation

Simultaneous in situ synthesis of nanosilver and dyeing of polyamide 6 fabric

In this research, in situ synthesis of silver nanoparticles (Ag NPs) has been established in an aqueous solution alongwith the dyeing of polyamide 6 fabric through a simple chemical reduction method by using silver nitrate (AgNO3),stannous chloride (SnCl2) and cetyltrimethylammonium bromide (CTAB). SnCl2 is used as a reducing agent in synthesis ofAg NPs and also as mordant in the dyeing of polyamide 6 fabric. The formation and distribution of Ag NPs on surface of thefabric are characterized by X-ray diffraction, scanning electron microscope and energy dispersive X-ray. The SEM imagesindicate the covering of fabric surface with Ag NPs. Loading of Ag NPs on the fabric surface leads to higher color strengthand change in colour. The presence of stannous and silver ions also leads to change in the reflectance behaviour of the dyedfabrics. CTAB has antibacterial properties and shows stabilizing effects in synthesis of Ag NPs, which further showssynergistic effect in antibacterial activities of Ag NPs loaded fabrics

Development of antimicrobial polyester fabric by a green in situ synthesis of copper nanoparticles mediated from chitosan and ascorbic acid

The antimicrobial functionalization of polyester fabrics (PES) is useful to provide protection from pathogens and reducing odors. Copper nanoparticles (CuNPs) have been widely applied due to their antimicrobial properties and higher biocompatibility compared with other metal nanoparticles. However, the inherent instability of CuNPs under atmospheric conditions and the use of harmful chemicals during their synthesis limit their use. Thus, the development of efficient and safe methods for the CuNPs synthesis and their stabilization onto surfaces present high interest. In this work, PES was functionalized with CuNPs via in situ synthesis using cost-effective and safe chemicals in the presence and absence of chitosan. In sample without chitosan, the CuNPs showed a suitable stabilization onto PES due to the doubled stabilization of ascorbic acid (AA) and cetyl trimethyl ammonium bromide (CTAB). In sample with chitosan, less CuNPs were retained by the PES but also less CuNPs agglomeration was observed. Both samples presented excellent antibacterial effect against Staphylococcus aureus (S. aureus) and Escherichia coli (E. coli) as well as laundering durability.(undefined

Comparison of APACHE II and SAPS II Scoring Systems in Prediction of Critically ill Patients’ Outcome

Introduction: Using physiologic scoring systems for identifying high-risk patients for mortality has been considered recently. This study was designed to evaluate the values of Acute Physiology and Chronic Health Evaluation II (APACHE II) and Simplified Acute Physiologic Score (SAPS II) models in prediction of 1-month mortality of critically ill patients.Methods: The present prospective cross sectional study was performed on critically ill patients presented to emergency department during 6 months. Data required for calculation of the scores were gathered and performance of the models in prediction of 1-month mortality were assessed using STATA software 11.0.Results: 82 critically ill patients with the mean age of 53.45 ± 20.37 years were included (65.9% male). Their mortality rate was 48%. Mean SAPS II (p < 0.0001) and APACHE II (p = 0.0007) scores were significantly higher in dead patients. Area under the ROC curve of SAPS II and APACHE II for prediction of mortality were 0.75 (95% CI: 0.64 - 0.86) and 0.72 (95% CI: 0.60 - 0.83), respectively (p = 0.24). The slope and intercept of SAPS II were 1.02 and 0.04, respectively. In addition, these values were 0.92 and 0.09 for APACHE II, respectively.Conclusion: The findings of the present study showed that APACHE II and SAPS II had similar value in predicting 1-month mortality of patients. Discriminatory powers of the mentioned models were acceptable but their calibration had some amount of lack of fit, which reveals that APACHE II and SAPS II are partially perfect

Modificación de tejido de poliéster mediante la fabricación de compuestos de nano-cobre

This research introduces a new method of polyester fabric surface modification in order to achieve distinctive features. The copper sulfate, sodium hydroxide and cetyl trimethylammonium bromide (CTAB) were used to synthesize copper nanoparticles, and loaded on the polyester fabric surface. The optimal sample was considered by SEM-EDX, FT-IR and XRD devices. SEM images showed copper nanoparticles in shape of nano-plates with 150 to 600 nm in length and thickness of about 30 nm. The best results obtained on the modified fabric processed at boil for 120 min. According to the results of experiments CuO and Cu0 were synthesized on the fabric.This research introduces a new method of polyester fabric surface modification in order to achieve distinctive features. The copper sulfate, sodium hydroxide and cetyl trimethylammonium bromide (CTAB) were used to synthesize copper nanoparticles, and loaded on the polyester fabric surface. The optimal sample was considered by SEM-EDX, FT-IR and XRD devices. SEM images showed copper nanoparticles in shape of nano-plates with 150 to 600 nm in length and thickness of about 30 nm. The best results obtained on the modified fabric processed at boil for 120 min. According to the results of experiments CuO and Cu0 were synthesized on the fabric

Preparation of a naturally driven cotton wound dressing via honey, Tragacanth and Sumac

An antibacterial wound dressing with wound healing effects of honey (H), Tragacanth Gum (TG) and Sumac (S) (Rhus coriaria L.) has been prepared. The antibacterial properties of five different concentrations of water extracted Sumac has been examined to find out the best sample. Ratios of honey and Tragacanth Gum are investigated along with the chosen concentration of Sumac in order to find out the optimum compound with desirable antibacterial and healing effects. The results of the well diffusion test indicate antibacterial activities against S. aureus and E. coli on all samples. Scratch test results demonstrate improvement in the proliferation of fibroblasts on the fabric treated with compounds. The prepared wound dressing accelerates the healing process and eliminates bacterial growth causing wound infection.

Preparation of a naturally driven cotton wound dressing via honey, Tragacanth and Sumac

260-266An antibacterial wound dressing with wound healing effects of honey (H), Tragacanth Gum (TG) and Sumac (S) (Rhus coriaria L.) has been prepared. The antibacterial properties of five different concentrations of water extracted Sumac has been examined to find out the best sample. Ratios of honey and Tragacanth Gum are investigated along with the chosen concentration of Sumac in order to find out the optimum compound with desirable antibacterial and healing effects. The results of the well diffusion test indicate antibacterial activities against S. aureus and E. coli on all samples. Scratch test results demonstrate improvement in the proliferation of fibroblasts on the fabric treated with compounds. The prepared wound dressing accelerates the healing process and eliminates bacterial growth causing wound infection

Association of two high-risk strains of human papillomavirus (HPV18 and HPV16) with breast cancer in the patients using polymerase chain reaction

Introduction: Two high-risk strains of human papillomavirus (HPV18 and HPV16) immortalize human mammary epithelial cells and reduce their growth factor requirements. Recent studies have identified HPV in a broad range of breast cancer samples. Therefore, the study aimed to assess the association of the mentioned high-risk HPV strains (HPV18, HPV16) with breast cancer in the patients using polymerase chain reaction (PCR) due to the increasing prevalence of breast cancer. Methods: The current work was a retrospective study involving 60 participants (40 patients with breast cancer and 20 healthy people) at Tabriz University of Medical Sciences in 2018-2019. The participants were selected using a convenience sampling method. PCR was used to detect DNA genomes of HPV18 and HPV16. Data was analyzed using Phi and Cramér’s V with SPSS v. 21 by taking into account OR=95% and P=0.05. Results: There was a significant relationship (P value=0.014) between HPV18 and HPV16 infection and breast cancer. Conclusion: A significant relationship was found between the presence of DNA genomes of HPV16 and HPV18 and breast cancer. Therefore, HPV has a significant role in breast cancer

Usage of alkaline glucose for Synthesis Copper Nano particle on Polyester Fabric

In this study, Nano copper from the chemical reaction between copper salt and sodium hydroxide was produced. Interestingly, simultaneous synthesis of Nano-copper chemical method and depositing Nano materials on the fabric's surface. The glucose is used as a stabilizer. An important feature of this study is, simplicity, availability, low cost and etc. The results create Nano-copper with a thickness of 30-40 nanometers on the surface of the fabric is shown. The treated fabrics could be used in diverse areas such as defense, aerospace, electronics, medical and health industries