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Yadav, Dolly,Yadav, Rajesh K.,Kumar, Abhishek,Park, No‐,Joong,Kim, Jae Young,Baeg, Jin‐,Ook John WileySons, Inc. 2020 Journal of applied polymer science Vol.137 No.14
<P><B>ABSTRACT</B></P><P>C<SUB>60</SUB>‐based polymeric systems have been constantly anticipated for sustainable solar energy conversion. Reported, herein is a C<SUB>60</SUB> polymer film as visible light active photocatalyst for efficient and selective reduction of CO<SUB>2</SUB> for the first time. The C<SUB>60</SUB> polymer photocatalyst is synthesized via covalent coupling of C<SUB>60</SUB> monomer units consisting of tetra substituted C<SUB>60</SUB>‐pyrene conjugates through spacer groups. The synthesized C<SUB>60</SUB> polymer photocatalyst possesses an extended network of well‐defined repeating monomer units with good stability and visible light‐induced photocatalytic activity. The enhanced visible light harvesting ability of C<SUB>60</SUB> polymer photocatalyst reasonably yields it with higher catalytic ability than its monomer unit. The C<SUB>60</SUB> polymer film photocatalyst upon coupling with the biocatalyst carries out highly selective visible light driven reduction of CO<SUB>2</SUB> to HCOOH (239.46 μmol). The tandem way of incorporating C<SUB>60</SUB> into visible light active polymeric films for continuous use may be highly rewarding for their extended photocatalytic activity for solar fuel production from CO<SUB>2</SUB>. © 2019 Wiley Periodicals, Inc. J. Appl. Polym. Sci. <B>2020</B>, <I>137</I>, 48536.</P>
Yadav, Rajesh K.,Oh, Gyu Hwan,Park, No-Joong,Kumar, Abhishek,Kong, Ki-jeong,Baeg, Jin-Ook American Chemical Society 2014 JOURNAL OF THE AMERICAN CHEMICAL SOCIETY - Vol.136 No.48
<P>The successful development of a photocatalyst/biocatalyst integrated system that carries out selective methanol production from CO<SUB>2</SUB> is reported herein. The fine-tuned system was derived from a judicious combination of graphene-based visible light active photocatalyst (CCG-IP) and sequentially coupled enzymes. The covalent attachment of isatin-porphyrin (IP) chromophore to chemically converted graphene (CCG) afforded newly developed CCG-IP photocatalyst for this research endeavor. The current work represents a new benchmark for carrying out highly selective methanol formation from CO<SUB>2</SUB> in an environmentally benign manner.</P><P><B>Graphic Abstract</B> <IMG SRC='http://pubs.acs.org/appl/literatum/publisher/achs/journals/content/jacsat/2014/jacsat.2014.136.issue-48/ja509650r/production/images/medium/ja-2014-09650r_0007.gif'></P><P><A href='http://pubs.acs.org/doi/suppl/10.1021/ja509650r'>ACS Electronic Supporting Info</A></P>
Yadav, Rajesh K.,Kumar, Abhishek,Park, No-Joong,Kong, Ki-Jeong,Baeg, Jin-Ook The Royal Society of Chemistry 2016 Journal of Materials Chemistry A Vol.4 No.24
<P>Two-dimensional covalent organic frameworks (2D COFs) are a class of crystalline polymers with a design controllable platform that may be developed into a new type of metal-free photocatalyst. The exploration of new frameworks is, however, critical for further progress in this emerging field. To realize their full potential in practical light harvesting applications, the fabrication of a film type photocatalyst is equally essential. Here, we report the successful development of a triazine based covalent organic framework (2D CTF) as an inexpensive and highly efficient visible light active flexible film photocatalyst for solar fuel production from CO2. For this research work, the condensation polymerization between cyanuric chloride and perylene diimide has been exploited for the first time as a new synthetic approach to the construction of 2D CTFs. The visible light-harvesting capacity, suitable band gap and highly ordered π electron channels contribute to the excellent performance of the film photocatalyst. The current study is a benchmark example of COF based photocatalysts for solar fuel production from CO2and is expected to trigger further interest in potential solar energy conversion applications such as wearable devices.</P>
Sachin Yadav,Praveen Kumar Sharma,Sudhir Kumar Singh,Atul Abhishek Jha,Reethesh,Anurag Garg 소화기인터벤션의학회 2022 Gastrointestinal Intervention Vol.11 No.3
In the modern era, endoscopic retrograde cholangiopancreatography (ERCP) and therapeutic endoscopic ultrasound (EUS) are increasingly being performed in day-care settings. The safety of these procedures in elderly admitted patients has been established in previous studies, but evidence for the safety of day-care ERCP/therapeutic EUS is limited. We retrospectively analyzed the outcomes of day-care ERCP/EUS in patients more than 80 years of age. All procedures were done under total intravenous anesthesia (ketamine- and propofol-based) and the intra-procedural and immediate postprocedural complications (within 6 hours) were noted. Thirty patients (24 male and 6 female) were enrolled. The most common indication for the procedure was choledocholithiasis (46.6%), followed by malignant stenosis (30.0%) and benign strictures (20.0%). One patient had transient desaturation during the procedure and two patients had hypotension. The dreaded complications of bleeding, perforation, or pancreatitis did not occur in any patients, and none required admission. In conclusion, day-care therapeutic ERCP/EUS is safe and cost-effective in the oldest old patients.
Sachin Yadav,Praveen Kumar Sharma,Sudhir Kumar Singh,Atul Abhishek Jha,Reethesh,Anurag Garg 소화기인터벤션의학회 2022 International journal of gastrointestinal interven Vol.11 No.3
In the modern era, endoscopic retrograde cholangiopancreatography (ERCP) and therapeutic endoscopic ultrasound (EUS) are increasingly being performed in day-care settings. The safety of these procedures in elderly admitted patients has been established in previous studies, but evidence for the safety of day-care ERCP/therapeutic EUS is limited. We retrospectively analyzed the outcomes of day-care ERCP/EUS in patients more than 80 years of age. All procedures were done under total intravenous anesthesia (ketamine- and propofol-based) and the intra-procedural and immediate postprocedural complications (within 6 hours) were noted. Thirty patients (24 male and 6 female) were enrolled. The most common indication for the procedure was choledocholithiasis (46.6%), followed by malignant stenosis (30.0%) and benign strictures (20.0%). One patient had transient desaturation during the procedure and two patients had hypotension. The dreaded complications of bleeding, perforation, or pancreatitis did not occur in any patients, and none required admission. In conclusion, day-care therapeutic ERCP/EUS is safe and cost-effective in the oldest old patients.
Charu Sharma,Pratibha Singh,Shashank Shekhar,Abhishek Bhardwaj,Manisha Jhirwal,Navdeep Kaur Ghuman,Meenakshi Gothwal,Garima Yadav,Priyanka Kathuria,Vibha Mishra 대한산부인과학회 2023 Obstetrics & Gynecology Science Vol.66 No.4
Objective Due to its comprehensive, reliable, and valid format, the objective structured clinical examination (OSCE) is the gold standard for assessing the clinical competency of medical students. In the present study, we evaluated the importance of the OSCE as a learning tool for postgraduate (PG) residents assessing their junior undergraduate students. We further aimed to analyze quality improvement during the pre-coronavirus disease (COVID) and COVID periods. Methods This quality-improvement interventional study was conducted at the Department of Obstetrics and Gynecology. The PG residents were trained to conduct the OSCE. A formal feedback form was distributed to 22 participants, and their responses were analyzed using a five-point Likert scale. Fishbone analysis was performed, and the ‘plan-do-study-act’ (PDSA) cycle was implemented to improve the OSCE. Results Most of the residents (95%) believed that this examination system was extremely fair and covered a wide range of clinical skills and knowledge. Further, 4.5% believed it was more labor- and resource intensive and time-consuming. Eighteen (81.8%) residents stated that they had learned all three domains: communication skills, time management skills, and a stepwise approach to clinical scenarios. The PDSA cycle was run eight times, resulting in a dramatic improvement (from 30% to 70%) in the knowledge and clinical skills of PGs and the standard of OSCE. Conclusion The OSCE can be used as a learning tool for young assessors who are receptive to novel tools. The involvement of PGs in the OSCE improved their communication skills and helped overcome human resource limitations while manning various OSCE stations.