Vaccine is an important means to prevent diseases, which have attracted the attention of many researchers. However, the immune efficacy of vaccine is limited and requires effective antigen delivery and adjuvant systems to provide appropriate vaccines or immunotherapy antigens for improving the immune efficacy of the mucosal immune system. Recent years, the application of chitosan and its derivatives in immunization have attracted a lot of attention. Many research results proved that chitosan and its derivatives were promising vaccine adjuvants and carriers, which improved immune response for its promising mucoadhesive properties. Among the derivatives, TMC and HTCC are currently the most studied quaternized chitosans. In the first part of our review, we elucidate the preparation methods of chitosan, TMC and HTCC and the factors that may affect their immunity. In the second part, not only we introduce their application as adjuvants and carriers to improve the efficacy of vaccines, but also their application as surface modification materials to improve immune response. All in all, we hold that chitosan, TMC and HTCC are promising biomaterials that can be used to improve immune efficacy, of which TMC may have good development potential. V.Scaffolds of tissue engineering for particular sites, for example, nerve, cardiac, and bone tissues, require a comprehensive design of 3D biomaterials that covers all aspects of physical structures and chemical composition, needed for desired cell regeneration. Injectable and in situ forming hydrogel scaffolds, possessing highly hydrated and interconnected structures, have demonstrated several advantages for use in regenerative medicine. In this study, we have developed a new design of injectable hydrogels based on collagen, aldehyde modified-nanocrystalline cellulose, and chitosan loaded with gold nanoparticles (Collagen/ADH-CNCs/CS-Au). The results of experiments exposed that the various molar ratios of Collagen/CNCs and the presence of CS-Au content have a significant effect on the microscopic morphology, equilibrium swelling, in vitro degradation, and mechanical properties of the hydrogels. The cytotoxicity analysis was performed for the NIH 3T3 cell line, which displays the effectiveness and non-toxicity of the developed hydrogels towards the destruction of the cells. The achieved results suggested that the prepared hydrogel network has great potential as a new biomaterial for tissue engineering applications. V.An efficient composite adsorbent was fabricated based on carboxymethyl cellulose (CMC) microbeads incorporated carboxylated graphene oxide (GOCOOH) for the adsorptive removal of cationic methylene blue dye (MB). The developed CMC/GOCOOH composite microbeads were characterized by means of FTIR, TGA, SEM, XPS, BET and zeta potential analysis tools. Various parameters affecting the removal of MB dye such as the amount of GOCOOH, initial MB concentration, adsorbent dosage, pH and medium temperature were optimized using a series of batch adsorption experiments. The experimental data of the adsorption process were more fitted to Langmuir isotherm (R2 = 0.998) with a maximum adsorption capacity of 180.32 mg/g and followed the pseudo-second order kinetic model. Moreover, the adsorption of MB dye onto CMC/GOCOOH composite microbeads was an exothermic process with a maximum capacity at pH 10. Besides, the fabricated adsorbent exposed also better reusability for nine repetitive cycles with highly adsorption properties. The gained results imply that the CMC/GOCOOH microbeads could be potentially applied as an effective and reusable adsorbent for MB dye removal from aqueous solutions. Clozapine is an atypical antipsychotic used for the treatment of schizophrenia. The prescribed target daily doses may reach 900 mg. Literature studies report a connection between clozapine usage and thrombosis development. Our in vitro study aimed to provide insight into molecular bases of this observation, investigating clozapine binding to fibrinogen, the main plasma protein involved in hemostasis. Fibrinogen/clozapine interaction was confirmed by protein fluorescence quenching, with an affinity constant of 1.7 × 105 M-1. Direct interactions did not affect the structure of fibrinogen, nor fibrinogen melting temperature. Clozapine binding affected fibrin formation by reducing coagulation speed and thickness of fibrin fibers suggesting that in the presence of clozapine, fibrinogen may acquire thrombogenic characteristics. Although no difference in fibrin gel porosity was detected, other factors present in the blood may act synergistically with altered fibrin formation to modify fibrin clot, thus increasing the risk for development of thrombosis in patients on clozapine treatment.  https://www.selleckchem.com/products/polybrene-hexadimethrine-bromide-.html  ORAC and HORAC assays showed that clozapine reduced free radical-induced oxidation of fibrinogen. All observed effects of clozapine on fibrinogen are dose-dependent, with the effect on fibrin formation being more pronounced. V.Lectins are proteins capable of specific and reversible binding to mono- and/or oligosaccharides, and within this group, Legume lectins are the most studied. However, most of these studies focus on the Papilionoideae subfamily, with Caesalpinioideae and Mimosoideae lectins being significantly less explored in the literature. The Mimosoideae subfamily consists of at least 79 genera and 3275 species, but, to date, only about 14 lectins have been purified, a fact which shows the lack of studies for this group. Based on their purification protocols, as well as physicochemical and structural properties, Mimosoideae lectins are very heterogeneous. Despite the few studies, a wide variety of biological activities have been tested, including, for example, inflammatory, anticancer, antibacterial, and antifungal. In this context, the present review aims to summarize the available data regarding the purification, physicochemical and structural properties, as well as biological activities, of lectins extracted from plants of the Mimosoideae subfamily in order to bring more insight to researchers interested in further exploring the potential of these molecules. V.