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treatment, industrial and household products, textiles, and especially in many fields connected to medicine; this is because of their excellent antibacterial, anti-fungal, anti-viral, and anti-inflammatory properties [ 7 , 8 ]. The possibilities of silver nanoparticle modification were used in textile technologies in the production of antibacterial textiles due to their potential to reduce infection transmission in medical environments [ 9 ]. The functionalization of textile products with the use of silver nanoparticles can be accomplished by depositing silver

polyurethane induces antimicrobial activity in central venous catheters”, Infection, Vol. 27, 16-23, 1999. DOI:10.1007/BF02561612 [9] S. Gurunathana, K.J. Leeb, K. Kalishwaralala, S. Sheikpranbabua, R. Vaidyanathan, and S.H. Eom, “Antiangiogenic properties of silver nanoparticles”, Biomaterials, Vol. 30, 6341-6350, 2009. DOI: 10.1016/j.biomaterials.2009.08.008. [10] Y.H. Hsin, C.F. Chen, S. Huang, T.S. Shih, P.S.Lai, and P.J. Chueh, “The apoptotic effect of nanosilver is mediated by a ROS- and JNK-dependent mechanism involving the mitochondrial pathway in NIH3T3 cells

References 1. Ahamed, M., AlSalhi, M. S., & Siddiqui, M. K. J. (2010). Silver nanoparticle applications and human health. Clin. Chim. Acta, 411, 1841-1848. DOI: 10.1016/j.cca.2010.08.016. 2. Capek, I. (2004). Preparation of metal nanoparticles in water-in-oil (w/o) microemulsions. Adv. Colloid Interface Sci., 110, 49-74. DOI: 10.1016/j. cis.2004.02.003. 3. Mahendra, R., Alka, Y., & Aniket, G. (2009). Silver nanoparticles as a new generation of antimicrobials. Biotechnol. Adv., 27(1), 76-83. DOI: 10.1016/j. biotechadv.2008.09.002. 4. Frattini, A., Pellegri, N

Introduction Nanotechnologies are involved in finding new inexpensive, rapid and safe solutions for synthesis of nanoparticles, especially silver and gold nanoparticles ( 1 , 2 , 3 ), efficient against spoiling or pathogenic microorganisms producing important economic loss in agriculture and food industry or seriously affecting plants, animals and human health ( 4 , 5 , 6 , 7 , 8 ). A lot of research is devoted to biosynthesis of silver nanoparticles (AgNPs) with antimicrobial properties, mediated by various natural sources such as extracts of plant parts

References Aebi H. (1984). Catalase in vitro. Method. Enzymol., 105: 121-126. Ahmadi F., Rahimi F. (2011). The effect of different levels of nano silver on performance and retention of silver in edible tissues of broilers. World Appl. Sci., 12: 1-4. Ahmadi F., Khah M.M., Javid S., Zarneshan A., Akradi L., Salehifar P. (2013). The effect of dietary silver nanoparticles on performance, immune organs, and lipid serum of broiler chickens during starter period. Int. J. Biosci., 3: 95-100. Balasubramanian S.K., Jittiwat J., Manikandan J., Ong C.N., Yu L.E., Ong W

.00027 3. Jain, J., Arora, S., Rajwade, J.M., Omray, P., Khandelwal, S., Paknikar, K.M. (2009). Silver nanoparticles in therapeutics: development of an antimicrobial gel formulation for topical use. Mol Pharm. 6(5): 1388-1401. https://doi.org/10.1021/mp900056g PMid:19473014 4. Rigo, C., Ferroni, L., Tocco, I., Roman, M., Munivrana, I., Gardin, C., Cairns, W.R., et al. (2013). Active silver nanoparticles for wound healing. Int J Mol Sci. 14(3): 4817-4840. https://doi.org/10.3390/ijms14034817 PMid:23455461 PMCid:PMC3634485 5. Klasen, H.J. (2000). A historical review of

Abstract

Colloidal silver nanoparticles were prepared by rapid green synthesis using different tannin sources as reducing agent viz. chestnut (CN), mangrove (MG) and quebracho (QB). The aqueous silver ions when exposed to CN, MG and QB tannins were reduced which resulted in formation of silver nanoparticles. The resultant silver nanoparticles were characterized using UV-Visible, X-ray diffraction (XRD), scanning electron microscopy (SEM/EDX), and transmission electron microscopy (TEM) techniques. Furthermore, the possible mechanism of nanoparticles synthesis was also derived using FT-IR analysis. Spectroscopy analysis revealed that the synthesized nanoparticles were within 30 to 75 nm in size, while XRD results showed that nanoparticles formed were crystalline with face centered cubic geometry.

., & Reisfeld, R. (2010). Synthesis of silver nanoparticles and their stabilization in different sol-gel matrices: Optical and structural characterization. Phys. Status Solidi C , 7 (11/12), 2648–2651. DOI: 10.1002/pssc.200983784. 13. Kansy, J. (1996). Microcomputer program for analysis of positron annihilation lifetime spectra. Nucl. Instrum. Methods Phys. Res., Sect. A-Accel. Spectrom. Dect. Assoc. Equip. , 374 (2), 235–244. DOI: 10.1016/0168-9002(96)00075-7. 14. Shukla, A., Peter, M., & Hoffmann, L. (1993). Analysis of positron lifetime spectra using quantified maximum

Abstract

Silver colloidal nanoparticles were prepared according to the chemical reduction method in which the ascorbic acid was used as a reducing agent and sodium citrate as a stabilizing agent. The absorption spectra of all prepared samples obtained using the UV-Vis spectrophotometer showed a surface plasmon peak at a wavelength of about 420 nm. The size of the silver nanoparticles was controlled by changing the pH values of the reaction system. At high pH, smaller size silver nanoparticles were obtained compared to low pH values. This difference can be attributed to the difference in the reduction rate of the precursor. In addition to the inverse proportionality between the size and the pH value it is clear that increasing the pH value enables us to obtain spherical nanoparticles while at low pH, rods and triangular particle shapes were formed. Poor balance between nucleation and growth processes could be the cause of this result.

Acta. 2010;411:1841-1848. PubMed: 20719239. [8] Kim CJ, Jung YH, Oh HM. J Microbiol. 2007;45:122-127. [9] Belay A, Ota Y, Miyakawa K, Shimamatsu H. J Appl Phycol. 1993;5:235-241. [10] Doshi H, Ray A, Kothari IL. Biotechnol Bioeng. 2007;96;1051-1063. DOI 10.1002/bit.21190. [11] Sadowski Z. Biosynthesis and Application of Silver and Gold Nanoparticles. In: Pozo Perez D, editor. Silver nanoparticles. InTech; 2010. DOI: 10.5772/8508. [12] Govindaraju K, Basha SK, Kumar VG, Singaravelu G, J Mater Sci. 2008;43:5115-5122. [13] Mosulishvili LM, Belokobylsky AI, Kirkesali EI