DESIGN/METHODOLOGY/APPROACH: The research thoroughly examined the literature for the previous ten years using a comprehensive evaluation, mapping and analyzes research networks of the literature on relational social influence factors through bibliometric analysis. It offers a conceptual framework that explains extrinsic social factors and their effects on the psychological needs satisfaction to share knowledge among people from the viewpoint of a need to belong.
FINDINGS: The study concluded a unique a conceptual framework that provides a solid understanding for the relational social influence phenomenon in the perspective of the need to belong, which satisfy the psychological needs to share knowledge. This will contribute to further investigations in the research area.
RESEARCH LIMITATIONS: The study is a qualitative study and is limited in its generalizability as it needs further investigations to overcome the bias on the part of the researcher.
PRACTICAL IMPLICATIONS: Adopting the proposed conceptual framework serves as a diagnostic tool for researchers to address the social influence that is likely to boost individuals' satisfaction to share knowledge.
ORIGINALITY/VALUE: This research presents a novel understanding of social influence as an extrinsic motivator arising from a sense of belonging that affects individuals' needs satisfaction to share knowledge.
SOCIAL IMPLICATIONS: Increasing the awareness of how social influence is likely to motivate individuals to connect with one another, interact socially, and work together collaboratively to fulfil their satisfaction of psychological needs to share knowledge.
Methods: The scanning electron microscopy-energy dispersive X-ray spectroscopy (SEM-EDX) was used to qualitatively detect the cellular accumulation of ZnO NPs in algal cells, while inductively coupled plasma optical emission spectrometry (ICP OES) was performed to quantify the cell associated-zinc in algal cells. The percentage of cell death, reduction in algal biomass, and loss in photosynthetic pigments were measured to investigate the cytotoxic effects of ZnO NPs on H. pluvialis. Extracellular and intracellular changes in algal cells resulted from the treatment of ZnO NPs were demonstrated through optical, scanning, and transmission electron microscopic studies.
Results: SEM-EDX spectrum evidenced the accumulation of ZnO NPs in algal biomass and ICP OES results reported a significant (p < 0.05) dose- and time-dependent accumulation of zinc in algal cells from 24 h for all the tested concentrations of ZnO NPs (10-200 μg/mL). Further, the study showed a significant (p < 0.05) dose- and time-dependent growth inhibition of H. pluvialis from 72 h at 10-200 μg/mL of ZnO NPs. The morphological examinations revealed substantial surface and intracellular damages in algal cells due to the treatment of ZnO NPs.
Discussion: The present study reported the significant cellular accumulation of ZnO NPs in algal cells and the corresponding cytotoxic effects of ZnO NPs on H. pluvialis through the considerable reduction in algal cell viability, biomass, and photosynthetic pigments together with surface and intracellular damages.
METHODS: The cytotoxic effects were all assessed through quantification of loss in cell viability, reduction in biomass and decrease in photosynthetic pigments such as chlorophyll-a, carotenoids and phycocyanin. The surface interactions of nanoparticles and the subsequent morphological alterations on algal cells were examined by optical and scanning electron microscopy (SEM). The intracellular alterations of algal cells were studied using transmission electron microscopy. Furthermore, Fourier transformed infrared (FTIR) spectrum was obtained to investigate the involvement of algal surface biomolecules in surface binding of ZnO NPs on algal cells.
RESULTS: The treatment of ZnO NPs on S. platensis exhibited a typical concentration- and time-dependent cytotoxicity. Results showed a significant (p