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Designing plasmonically integrated nanoreactors for efficient catalysis
Acharya Anubhab,이인수 대한화학회 2022 Bulletin of the Korean Chemical Society Vol.43 No.12
Plasmonically coupled nanoreactors capable of harnessing light energy and efficiently transforming it to perform chemical reactions are in significant demand in the field of catalysis. The development of unique solution-phase synthesis techniques for engineering intricate nanoarchitectures by introducing multiple functionalities can dramatically improve the efficacy of these nanos- tructures. In this context, the precise modulation of the nanostructural features and the integration of other components with the plasmonic nanoparticles within an isolated nanoconfined reaction environment is the current state of the art for their synthesis. This account highlights our achievements in design- ing different synthesis strategies and elucidating the mechanistic pathways involved in the development of plasmonically integrated nanoreactors. The range of applications of these plasmonic nanoreactors, which employ plasmon-induced energy for catalytic transformations, is also discussed.
Acharya, Bodhraj,Wang, Kai,Kim, In-San,Kang, WoongChol,Moon, Chanil,Lee, Byung-Heon Elsevier 2013 Journal of controlled release Vol.172 No.1
<P><B>Abstract</B></P> <P>During acute myocardial infarction (AMI), both apoptosis and necrosis of myocardial cells could occur and lead to left ventricular (LV) functional decline. Here we determined whether <I>in vivo</I> imaging signals of myocardial cell death by ApoPep-1 (CQRPPR), a peptide probe that binds to apoptotic and necrotic cells through histone H1, at an early stage after AMI showed correlation with the long-term heart function. AMI was induced using a rat model of ischemia and reperfusion (I/R) injury. Fluorescence-labeled ApoPep-1 was administered by intravenous injection into rats 2h after reperfusion. <I>Ex vivo</I> imaging of hearts isolated 2h after peptide injection showed higher levels of near-infrared fluorescence (NIRF) signals at hearts of I/R rats than those of sham-operated rats. The fluorescent peptide was rapidly cleared from the blood and did not bind to red and white blood cells. Localization of fluorescent ApoPep-1 at the area of cell death was demonstrated by co-staining of myocardial tissue with TUNEL. The intensity of <I>in vivo</I> NIRF imaging signals by homing of ApoPep-1 to injured myocardium of I/R rats obtained 2h after peptide injection (equivalent to 4h after injury) showed strong and moderate correlation with the change in the LV ejection fractions (r<SUP>2</SUP> =0.82) and the size of the fibrotic area (r<SUP>2</SUP> =0.64), respectively, observed at four weeks after injury. These results suggest that ApoPep-1-mediated <I>in vivo</I> imaging signals of myocardial cell death, including both apoptosis and necrosis, at an early stage of AMI could be a potential biomarker for assessment of long-term outcome of heart function.</P> <P><B>Graphical abstract</B></P> <P>Peptide-based <I>in vivo</I> imaging of myocardial cell death for assessment of long-term heart function</P> <P>[DISPLAY OMISSION]</P>
GUNS AND BUTTER : WHY DO HUMAN SECURITY AND TRADITIONAL SECURITY CO-EXIST IN ASIA?
Acharya, Amitav 연세대학교 동서문제연구원 2003 Global economic review Vol.32 No.3
This paper examines the concept of human security as it applies to Asia, in challenging the dominance of the national security paradigm in Asia. To understand the concept of human security, we may combine the interdependent understandings of freedom from fear, freedom from want, and freedom from suffering in times of conflict. To make the distinction between human security and national security, we may highlight the following three important questions: whose security, security against what, and security in which areas.
Acharya, S.,Adamová,, D.,Aggarwal, M. M.,Rinella, G. Aglieri,Agnello, M.,Agrawal, N.,Ahammed, Z.,Ahmad, N.,Ahn, S. U.,Aiola, S.,Akindinov, A.,Alam, S. N.,Albuquerque, D. S. D.,Aleksandrov, D.,Al Springer 2017 European Physical Journal C Vol.77 No.5
<P>The invariant differential cross sections for inclusive [FORMULA OMISSION] and [FORMULA OMISSION] mesons at midrapidity were measured in pp collisions at [FORMULA OMISSION] TeV for transverse momenta [FORMULA OMISSION] GeV/<I>c</I> and [FORMULA OMISSION] GeV/<I>c</I>, respectively, using the ALICE detector. This large range in [FORMULA OMISSION] was achieved by combining various analysis techniques and different triggers involving the electromagnetic calorimeter (EMCal). In particular, a new single-cluster, shower-shape based method was developed for the identification of high-[FORMULA OMISSION] neutral pions, which exploits that the showers originating from their decay photons overlap in the EMCal. Above 4 GeV/[FORMULA OMISSION], the measured cross sections are found to exhibit a similar power-law behavior with an exponent of about 6.3. Next-to-leading-order perturbative QCD calculations differ from the measured cross sections by about 30% for the [FORMULA OMISSION], and between 30–50% for the [FORMULA OMISSION] meson, while generator-level simulations with PYTHIA 8.2 describe the data to better than 10–30%, except at [FORMULA OMISSION] GeV/[FORMULA OMISSION]. The new data can therefore be used to further improve the theoretical description of [FORMULA OMISSION] and [FORMULA OMISSION] meson production.</P>
Acharya, S.,Adamová,, D.,Aggarwal, M. M.,Aglieri Rinella, G.,Agnello, M.,Agrawal, N.,Ahammed, Z.,Ahmad, N.,Ahn, S. U.,Aiola, S.,Akindinov, A.,Alam, S. N.,Albuquerque, D. S. D.,Aleksandrov, D.,Al Springer 2017 European Physical Journal C Vol.77 No.6
<P>We present results on transverse momentum ([FORMULA OMISSION]) and rapidity ([FORMULA OMISSION]) differential production cross sections, mean transverse momentum and mean transverse momentum square of inclusive [FORMULA OMISSION] and [FORMULA OMISSION] at forward rapidity ([FORMULA OMISSION]) as well as [FORMULA OMISSION]-to-[FORMULA OMISSION] cross section ratios. These quantities are measured in pp collisions at center of mass energies [FORMULA OMISSION] and 13 TeV with the ALICE detector. Both charmonium states are reconstructed in the dimuon decay channel, using the muon spectrometer. A comprehensive comparison to inclusive charmonium cross sections measured at [FORMULA OMISSION], 7 and 8 TeV is performed. A comparison to non-relativistic quantum chromodynamics and fixed-order next-to-leading logarithm calculations, which describe prompt and non-prompt charmonium production respectively, is also presented. A good description of the data is obtained over the full [FORMULA OMISSION] range, provided that both contributions are summed. In particular, it is found that for [FORMULA OMISSION] GeV/<I>c</I> the non-prompt contribution reaches up to 50% of the total charmonium yield.</P>
Neutral pion and η meson production at midrapidity in Pb-Pb collisions at sNN=2.76 TeV
Acharya, S.,Acosta, F. T.-.,Adamová,, D.,Adolfsson, J.,Aggarwal, M. M.,Aglieri Rinella, G.,Agnello, M.,Agrawal, N.,Ahammed, Z.,Ahn, S. U.,Aiola, S.,Akindinov, A.,Al-Turany, M.,Alam, S. N.,Albuqu American Physical Society 2018 Physical review. C Vol.98 No.4
<P>Neutral pion and eta meson production in the transverse momentum range 1 < p(T) < 20 GeV/c have been measured at midrapidity by the ALICE experiment at the Large Hadron Collider (LHC) in central and semicentral Pb-Pb collisions at root S-NN = 2.76 TeV. These results were obtained using the photon conversion method as well as the Photon Spectrometer (PHOS) and Electromagnetic Calorimeter detectors. The results extend the upper p(T) reach of the previous ALICE pi(0) measurements from 12 to 20 GeV/c and present the first measurement of eta meson production in heavy-ion collisions at the LHC. The eta/pi(0) ratio is similar for the two centralities and reaches at high p(T) a plateau value of 0.457 +/- 0.013(stat) +/- 0.018(syst) A suppression of similar magnitude for pi(0) and eta meson production is observed in Pb-Pb collisions with respect to their production in pp collisions scaled by the number of binary nucleon-nucleon collisions. We discuss the results in terms of Next to Leading Order (NLO) pQCD predictions and hydrodynamic models. The measurements show a stronger suppression than observed at lower center-of-mass energies in the p T range 6 < p(T) < 10 GeV/c. For p(T) < 3 GeV/c, hadronization models describe the pi(0) results while for the eta some tension is observed.</P>