Uncertainty, unfolding in the most extreme forms in the period of one of the greatest global challenges – a threat to the health and wellbeing of people, caused by the pandemic, is gaining a form difficult to conceive in temporal and conceptual terms. In the perception of students, the young people on the brink of the first employment, the uncertainty primarily reflects in the estimate of possibilities of finding a job and opportunities to construct a professional identity. This paper examines the potential role of personal branding in the improvement of student opportunities to find the desired job, as well as the importance of higher education institutions as strategic partners in the process. This paper, among others, also emphasizes the importance of empowering students towards the recognition of the role of their knowledge and competencies acquired during the studies; the role which does not correspond to banal, oversimplified reduction of the role of education as means to meet the labour market needs.

The biosensors are based on the electrons movement, i.e. electronic current determination as a reaction of enzyme-catalyzed redox reaction. Generally a normal contact voltage passes through the electrodes to analyze. In the enzymatic reaction which produces the substrate or product can transfer the electrons with the surface of electrodes to be reduced. As a result an alternate current flow can be measured. The substrate concentration is directly proportional to the magnitude of the current. The reduction of oxygen is acquired through the oxygen electrodes and it is a simple way to from an amperometric biosensor (Figure 2). The example is the determination of glucose by glucose. The above description is about the first generation of amperometric biosensor and it has a direct transfer of electrons which are released from the electrodes are having some difficulties. The second generation amperometric biosensors are developed in a mediator takes the electrons and transfer to the electrodes.