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Neha Kohli,Shivayogi M Hugar,Vidyavathi H Patil,Nivedita Saxena,Krishna S Kadam,Sanika Karmarkar 대한치과마취과학회 2022 Journal of Dental Anesthesia and Pain Medicine Vol.22 No.3
Background: Injections are one of the most fear-provoking stimuli in dentistry. Painless administration of an injection is a vital step in alleviating anxiety, which in turn leads to good behavior in children. The aim is to evaluate and compare anxiety levels and pain perception using conventional, insulin, and deception syringes during the administration of local anesthesia in children. Methods: Forty-five children aged 6–12 were selected using a standard sample size formula and equally divided into three groups. Local anesthesia was administered using a conventional syringe to Group A participants and an insulin syringe for Group B participants. Group C participants were administered local anesthesia using a deception syringe by showing the patient disposable obturation tips, and eventually a conventional syringe was used for administration of local anesthesia after hiding them from the patient. Anxiety levels were assessed using Venham’s Picture Scale and pulse rate at baseline and after administration of local anesthesia. The Wong-Baker Faces Pain Rating Scale was used to assess pain perception after the administration of local anesthesia. Results: Insulin and deception syringes showed better reduction in anxiety levels and pain perception than conventional syringes, demonstrating a high statistically significant difference. Conclusion: The use of insulin and deception syringes for administration of anesthesia was demonstrated to be effective in alleviating anxiety in children and is therefore recommended as an alternative to conventional syringes.
Sudhir Kumar,Neha Saxena,Ajay Mandal 한국공업화학회 2016 Journal of Industrial and Engineering Chemistry Vol.43 No.-
In this study an attention has been paid to synthesize polymer grafted anionic surfactant (PMES) derivedfrom nonedible vegetable oil (Jatropha) for its application in enhanced oil recovery (EOR). The polymericsurfactant was prepared by reacting acrylamide monomer with methyl ester sulfonate (MES) synthesizedfrom Jatropha oil by free radical polymerization mechanism. Polymeric surfactant with properties of bothsurfactant and polymer can control the mobility ratio and reduce interfacial tension (IFT), which aredesirable for EOR. The synthesized polymeric surfactant was characterized through FTIR, 1H NMR, FESEM,EDX, TGA, DLS analysis. The effectiveness of PMES for chemically enhanced oil recovery process wasinvestigated by measurement of physiochemical properties of its aqueous solution viz. reduction of IFT,wettability alteration and rheological behaviour. Rheological studies shows shear thinning behaviourwith apparent viscosity comparable to conventional polymers. The IFT between crude oil and aqueousPMES solution at its critical micelle concentration (CMC) was observed as 2.74 mN/m, which was furtherreduced to 0.37 mN/m on addition of 2.5 wt% NaCl. Coreflooding experiments were conducted insandpack system, to study the EOR efficiency using the synthesized polymeric surfactant and more than26% additional recovery was observed after usual waterflooding. Higher recoveries at highertemperature were observed because of swelling of crude oil and lowering of IFT.
Rahul,Kulbhushan Haldeniya,Ashish Singh,Neha Bhatt,Prabhakar Mishra,Rajneesh Kumar Singh,Rajan Saxena 한국간담췌외과학회 2021 Annals of hepato-biliary-pancreatic surgery Vol.25 No.4
Backgrounds/Aims: Re-resection of incidental gallbladder carcinoma (IGBC) is possible in a select group of patients. However, the optimal timing for re-intervention lacks consensus. Methods: A retrospective analysis was performed for a prospective database of 91 patients with IGBC managed from 2009 to 2018. Patients were divided into three groups based on the duration between the index cholecystectomy and re-operation or final staging: Early (E), < 4 weeks; Intermediate (I), > 4 weeks and < 12 weeks; and Late (L), > 12 weeks. Demographic data, tumor characteristics, and operative details of patients were analyzed to determine factors affecting the re-resectability of IGBC. Results: Twenty-two patients in ‘E’, 48 in ‘I’, and 21 in ‘L’ groups were evenly matched. Nearly two thirds were asymptomatic. Curative resection was possible in 48 (52.7%) patients. Metastasis was detected during staging laparoscopy (SL)/laparotomy in 26 (28.6%) patients. The yield of SL was more in the ‘L’ group (30.8%) than in the ‘I’ (11.1%) or ‘E’ (nil) group, avoiding unnecessary laparotomy in 13.6%. Only 28.5% of patients in the ‘L’ group could undergo curative resection (R0/R1 resection), significantly less than that in the ‘E’ (50.0%) or ‘I’ group (64.6%) (both p < 0.001). On multivariate analysis, presentation in intermediate period and tumor differentiation increased the chance of curative resection (p < 0.05). Conclusions: Asymptomatic patients in the ‘I’ group with well differentiated IGBC have the best chance of obtaining a curative resection.