A physical change is a change which only affects the form of a substance, but not its chemical composition. So, a physical change in terms of particle arrangement states that particles do not change apart from gaining or losing energy. It can be explained using the examples of freezing and melting.
When a substance is solid, its particles like atoms and molecules are very tightly packed. These cannot move freely but when a substance is in liquid or gaseous state, the particles are loosely packed and can move freely. So when water is solid the particles are tight but when it is in liquid state same particles can move faster. Hence, particles are same but their energy has changed.
Blood coagulation can be triggered by vascular devices including stents, hemodialyzers, and membrane oxygenators; as a result, systemic anticoagulants are frequently needed to prevent specific intravascular thrombotic/embolic events or extracorporeal device failure. Vascular device surface-initiated thrombus development has been demonstrated to be significantly influenced by coagulation factor (F)XII of the contact activation system. Targeting the contact activation system shows promise as a substantially safer method than conventional antithrombotic for avoiding vascular device-associated thrombosis because FXII is not required for hemostasis. Create and describe anti-FXII monoclonal antibodies that block the activation or activity of the enzyme. Methods: In FXII-deficient animals, monoclonal antibodies against FXII were produced, and their binding and anticoagulant abilities were examined in purified plasma systems, whole blood flow-based tests, and an in vitro experiment.
thrombus development caused by a vascular device in a living non-human primate animal. Results: Over 400 candidates were selected from an FXII antibody screen and tested in binding and clotting experiments. Six inhibitor antibodies and one non-inhibitor antibody were chosen for functional test evaluation. The most effective inhibitory antibody, 1B2, has been shown to lengthen clotting durations, inhibit fibrin development on collagen under shear, and inhibit platelet deposition and fibrin formation in an extracorporeal membrane oxygenator used in a non-human primate. Conclusion: Selective contact activation inhibitors have the potential to be helpful research tools as well as secure and efficient thrombosis inhibitors for vascular devices.
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The leaves of a plant contain the most chloroplasts. Plant leaves are the largest area of the plant while chloroplasts are used during photosynthesis to create a reliable source of food for the plant to use. Hence, many chloroplasts are found on the leaves of plants in order to gather light energy from the sun to create the greatest possible amount of food for the plant to consume.
Answer:
Behavioural adaptation
Explanation:
Behavioural adaptation is the actions of organisms that enable their survival in their environment. This behaviour varies with individual species and their environment. Examples
Bears stays in place in winter to escape from the cold temperatures and preserve energy.
Penguins huddles or stays together to prevent heat loss and main a warm environment during cold.
The ability of the male turkey to strut is what attracts the female turkeys to them an ensure continuity through Reproduction via mating.