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( Kalayarasan R. ),( Sasikumar K. ) 대한간학회 2020 춘·추계 학술대회 (KASL) Vol.2020 No.1
Aims: Additional surgical procedures are often required in patients with chronic pancreatitis (CP) related complications. The present study aims to analyze the type of additional procedures required in patients who underwent Frey’s procedure (Frey’s plus) and to compare with the short-term outcomes and quality of life of patients who underwent only Frey’s procedure. Methods: Retrospective analysis of a prospectively maintained database of patients who underwent surgery for CP between January 2012 and February 2018 and completed at least one year of follow-up. Patients who underwent non-Frey’s surgical procedures were excluded. Clinical parameters, postoperative pain relief (using Izbicki pain score) and functioning scale score (EORTC QLQ C30) of patients who underwent Frey’s plus procedure and only Frey’s procedure were compared. Results: Of the 146 patients who underwent surgery for CP during the study period, 100 patients (Frey’s procedure - 68 Frey’s plus procedure - 32) were included in this study. Rouxen- Y hepaticojejunostomy was the commonly performed additional procedure (n=10). The demographic and clinical parameters were comparable, except for more patients with jaundice (21.9%Vs.2.9%, P=0.002) and prolonged operative time (374.7mins Vs. 326.3 mins, p<0.001) in Frey’s plus group. However, there was no significant difference in mean intraoperative blood loss, postoperative morbidity or duration of hospital stay. At median (range) follow up of 34 (12-86) months, there was no significant difference in the pain control and quality of life between two groups. Conclusions: Frey’s plus procedure for chronic pancreatitis can be safely performed wherever indicated without adversely affecting the postoperative outcome or quality of life.
Liu, Huajun,Dong, Yongqi,Cherukara, Mathew J.,Sasikumar, Kiran,Narayanan, Badri,Cai, Zhonghou,Lai, Barry,Stan, Liliana,Hong, Seungbum,Chan, Maria K. Y.,Sankaranarayanan, Subramanian K. R. S.,Zhou, Hua American Chemical Society 2018 ACS NANO Vol.12 No.5
<P>Memristive devices are an emerging technology that enables both rich interdisciplinary science and novel device functionalities, such as nonvolatile memories and nanoionics-based synaptic electronics. Recent work has shown that the reproducibility and variability of the devices depend sensitively on the defect structures created during electroforming as well as their continued evolution under dynamic electric fields. However, a fundamental principle guiding the material design of defect structures is still lacking due to the difficulty in understanding dynamic defect behavior under different resistance states. Here, we unravel the existence of threshold behavior by studying model, single-crystal devices: resistive switching requires that the pristine oxygen vacancy concentration reside near a critical value. Theoretical calculations show that the threshold oxygen vacancy concentration lies at the boundary for both electronic and atomic phase transitions. Through <I>operando</I>, multimodal X-ray imaging, we show that field tuning of the local oxygen vacancy concentration below or above the threshold value is responsible for switching between different electrical states. These results provide a general strategy for designing functional defect structures around threshold concentrations to create dynamic, field-controlled phases for memristive devices.</P> [FIG OMISSION]</BR>
A. Nagarajan,V. Sethuraman,T.M. Sridhar,R. Sasikumar 한국공업화학회 2023 Journal of Industrial and Engineering Chemistry Vol.120 No.-
In this study, glassy carbon electrode modified by Au@NiO decorated polypyrrole nanocomposite(Au@NiO/PPy-GCE) was fabricated for sensing of cholesterol by non-enzymatic electrochemical method. The composite was characterized by XRD, XPS and morphological studies were examined using FE-SEMand TEM. The redox properties of cholesterol were investigated by cyclic voltammetry. When differentialpulse voltammetry was employed to sense cholesterol, it exhibited a linear range from 1.0 10-5 to1.0 10-4 M, with the sensitivity 7.6 lA lM1 cm2 and detection limit 5.8 x10-7 M. Hence, this compositehas excellent practical applications towards the fabrication of commercial sensors.