Injection molding is a method commonly used to manufacture plastic products. This technology makes it possible to obtain products of specially designed shape and size. In addition, the developed mold allows for repeated and repeatable production of selected plastic parts. Over the years, this technology grew in importance, and nowadays, products produced by injection molding are used in almost every field of industry. This paper is a review and provides information on recent research reports in the field of modern injection molding techniques. Selected plastics most commonly processed by this technique are discussed. Next, the chosen types of this technique are presented, along with a discussion of the parameters that affect performance and process flow. Depending on the proposed method, the influence of various factors on the quality and yield of the obtained products was analyzed. Nowadays, the link between these two properties is extremely important. The work presented in the article refers to research aimed at modifying injection molding methods enabling high product quality with high productivity at the same time. An important role is also played by lowering production costs and reducing the negative impact on the environment. The review discusses modern injection molding technologies, the development of which is constantly progressing. Finally, the impact of the technology on the ecological environment is discussed and the perspectives of the process were presented.

Silver nanoparticles (AgNPs) were prepared by a chemical reduction method in an aqueous solution of silver nitrate and sodium borohydride as a reducing agent in the presence of polyvinylpyrrolidone as a stabiliser. The effect of silver salt concentration on the synthesis and properties of AgNPs was investigated. The nanosized silver colloids have been characterised by using scanning electron microscopy and atomic absorption spectrometry. The optical properties of the silver nanoparticles were studied through UV–vis spectroscopy and Fourier transformed infrared (FTIR) spectroscopy. Dynamic light scattering measurement using Zetasizer nano ZS was applied for the size estimation of AgNPs. The results confirmed that silver nanoparticles were formed in each sample independently of silver salt content; however, silver nitrate concentration had a significant influence on silver nanoparticles morphology and other properties. The absorption intensity, the band of the FTIR spectra intensity increases with an increase of silver nitrate concentration. Also, the shape and size of particles depends on the silver nitrate concentration.

Regenerative medicine is becoming a rapidly evolving technique in today’s biomedical progress scenario. Scientists around the world suggest the use of naturally synthesized biomaterials to repair and heal damaged cells. Hydroxyapatite (HAp) has the potential to replace drugs in biomedical engineering and regenerative drugs. HAp is easily biodegradable, biocompatible, and correlated with macromolecules, which facilitates their incorporation into inorganic materials. This review article provides extensive knowledge on HAp and collagen-containing compositions modified with drugs, bioactive components, metals, and selected nanoparticles. Such compositions consisting of HAp and collagen modified with various additives are used in a variety of biomedical applications such as bone tissue engineering, vascular transplantation, cartilage, and other implantable biomedical devices.