We demonstrate here a local- and remote-control of gel disintegration by using photoinduced proton transfer chemistry of photoacid generator (PAG). The gels were prepared by simply mixing two polymers, poly(N-isopropylacrylamide-co-5-methacrylamido-1,2-benzoxaborole) (P(NIPAAm-co-MAAmBO)) and poly(3-gluconamidopropyl methacrylamide) (PGAPMA) via the synergistic interaction of benzoxaborole and diol groups. The o-nitrobenzaldehyde (o-NBA) was then loaded into the gel as a PAG. The benzoxaborole-diol interaction was successfully disintegrated upon UV irradiation due to the local pH decrease inside the gel. When the gel was irradiated to a specific gel region, the synergistic interactions were disintegrated only at the exposed region. Of special interest is that the whole material eventually transitioned from gel to sol state, as the generated protons diffused gradually toward the nonilluminated region. The ability of the proposed gel-sol transition system via photoinduced proton diffusion may be beneficial for not only prompt pH changes within the gel but also the design of predictive and programmable devices for drug delivery.
World Health Organization (WHO) defined stroke as "rapidly developing clinical signs of focal or global disturbance of cerebral function, lasting more than 24 hours or leading to death with no apparent cause other than vascular origin."
OBJECTIVESThe purpose of this study was to determine the frequency of raised hs-CRP levels in patients with first-ever acute ischaemic and haemorrhagic stroke. To evaluate the ability of hs-CRP levels as a biomarker to differentiate between haemorrhagic and ischaemic stroke. To evaluate whether hs-CRP levels in stroke correlate with other risk factors.
BACKGROUND AND OBJECTIVECerebrovascular accident, which has considerable mortality and morbidity deserves attention towards its prevention. The first line of defence in stroke prevention are detecting and adequately treating manageable risk factors.
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