## 3 Results and Discussion  
### UV-Vis Spectroscopy  
An essential and effective technique for the comprehensive categorization of synthesized nanoparticles is UV-vis spectroscopy. It is also used to examine AgNPs' stability and manufacturing process [33]. Due to the distinct optical characteristics of AgNPs, they strongly interact with specific light wavelengths [34]. Moreover, UV-Vis spectroscopy is said to be quick, easy, and simple to use. It is quick to measure different types of NPs and is both sensitive and selective for them. Additionally, colloidal suspension particle characterization does not require calibration [35].  
According to the reports, since the valence band and conduction band are so close together in AgNPs, electrons can move freely between them. An SPR absorption band is formed when the electrons of silver nanoparticles collectively oscillate in resonance with the light wave, which is caused by the free electrons discussed here [36]. The chemical environment, particle size, and dielectric medium all play a role in the absorption of AgNPs [37]. When the extract was incorporated into the AgNO\({}_{3}\) solution, the color gradually changed from yellow to reddish-brown due to the reduction of silver salts Ag1+ to Ag0 by the bioactive compound present in the flaxseed extract.  
The successful production of AgNPs was shown by the identification of the surface plasmon resonance which generates a single broad peak at 530 nm after 25 min (Figure 1).  
According to a study by [PERSON], and [PERSON], sesame husk, rice bran, and flaxseed are good fiber sources that can be added to a variety of foods (2015) [38]. It has been noted that flaxseed contains phytochemicals such as phenolic acids, cinnamic acids, flavonoids, and lignins that can act as reducing agents due to its capacity to donate electrons, the phenolic group enhances the transformation of silver nitrate into AgNPs [39], whereas proteins and several other phytochemicals act as capping agents for AgNPs [40]. The generation of the SPR peak is affected by variables such as size, shape, and particles produced. Furthermore, the variations in absorbance peak are directly correlated with changes in nanoparticle concentration. More AgNPs are produced as a result, which leads the peak intensity to increase over time as the extracted content becomes active [41]. When assessing these synthesized NPs, it is important to take into account several variables that impact the release rates of Ag ions. These variables primarily include particle size and environmental variables, including pH, temperature, time, radiation, dissolved oxygen, and capping agents [42].  
However, in most cases, the bioreduction of silver ions to create silver nanocrust by biocompounds derived from a biological source of plant or organism is rarely achieved.  
Generally, flavonoids, membrane proteins, NAD (P)+ reductases, dehydrogenases, citric acid, polyphenols, and secondary metabolites are examples of reducing agents [43],  
Figure 1: Shows the color change patterns of silver nitrate (AgNO\({}_{3}\)) (**A**), flaxseed extract (**B**), and biosynthesized AgNPs (**C**). As well as (**D**). Illustrates the UV–Vis spectrophotometer measurement of the biosynthesized AgNPs (a), AgNO\({}_{3}\) (b), and flax-seed extract (c).  
whereas extracellular proteins, enzymes, peptides, and tann acids are examples of capping agents [44].