Oxidative amidation by Cu(ii)–guanidine acetic acid immobilized on magnetized sawdust with eggshell as a natural base

2020 ◽  
Vol 44 (27) ◽  
pp. 11777-11785
Author(s):  
Atefeh Darvishi ◽  
Maryam Kazemi Miraki ◽  
Marzban Arefi ◽  
Akbar Heydari
Keyword(s):  
Acetic Acid ◽  
Low Cost ◽  
Solid Base ◽  
Acid Complex ◽  
Recoverable Catalyst ◽  
Amidation Reaction ◽  
Natural Base ◽  
Oxidative Amidation

Copper(ii)–guanidine acetic acid complex was immobilized on the surface of magnetized raw waste sawdust (SD) as an abundant natural biopolymer and employed as an efficient and recoverable catalyst in oxidative amidation reaction, while waste eggshell (ES) powder was used as a low-cost solid base.

Photodissociation spectroscopy of the Mg+-acetic acid complex

2006 ◽  
Vol 125 (18) ◽  
pp. 184310 ◽  
Author(s):  
Yohannes Abate ◽  
P. D. Kleiber
Keyword(s):  
Acetic Acid ◽  
Acid Complex

scholarly journals Development of algorithms for automated detection of cervical pre-cancers with a low-cost, point-of-care, Pocket colposcope

2018 ◽  
Author(s):  
Mercy Nyamewaa Asiedu ◽  
Anish Simhal ◽  
Usamah Chaudhary ◽  
Jenna L. Mueller ◽  
Christopher T. Lam ◽  
...  
Keyword(s):  
Acetic Acid ◽  
Visual Inspection ◽  
Point Of Care ◽  
Low Cost ◽  
Intraepithelial Neoplasia ◽  
Support Vector ◽  
Machine Model ◽  
Data Set ◽  
Automatic Feature Extraction ◽  
Lugol’S Iodine

AbstractGoalIn this work, we propose methods for (1) automatic feature extraction and classification for acetic acid and Lugol’s iodine cervigrams and (2) methods for combining features/diagnosis of different contrasts in cervigrams for improved performance.MethodsWe developed algorithms to pre-process pathology-labeled cervigrams and to extract simple but powerful color and textural-based features. The features were used to train a support vector machine model to classify cervigrams based on corresponding pathology for visual inspection with acetic acid, visual inspection with Lugol’s iodine, and a combination of the two contrasts.ResultsThe proposed framework achieved a sensitivity, specificity, and accuracy of 81.3%, 78.6%, and 80.0%, respectively when used to distinguish cervical intraepithelial neoplasia (CIN+) relative to normal and benign tissues. This is superior to the average values achieved by three expert physicians on the same data set for discriminating normal/benign cases from CIN+ (77% sensitivity, 51% specificity, 63% accuracy).ConclusionThe results suggest that utilizing simple color- and textural-based features from visual inspection with acetic acid and visual inspection with Lugol’s iodine images may provide unbiased automation of cervigrams.SignificanceThis would enable automated, expert-level diagnosis of cervical pre-cancer at the point-of-care.

Development of Rapid Colorimetric Assay for Detection of Gluconic Acid Using Iron(Ⅱ) and Indigo Carmine

2020 ◽  
Vol 42 (4) ◽  
pp. 525-525
Author(s):  
Yifeng Lan Yifeng Lan ◽  
Lixiang Zuo Lixiang Zuo ◽  
Yangyang Zhou Yangyang Zhou ◽  
Yanli Wei and Chuan Dong Yanli Wei and Chuan Dong
Keyword(s):  
Spectrophotometric Method ◽  
Gluconic Acid ◽  
Limit Of Detection ◽  
Colorimetric Assay ◽  
Low Cost ◽  
Indigo Carmine ◽  
Colorimetric Method ◽  
Food Samples ◽  
Reducing Agent ◽  
Acid Complex

In this work, a simple and rapid spectrophotometric method, which is based on the fact that Iron(Ⅱ) -gluconic acid complex as a kind of reducing agent deterioration of indigo carmine dyes, was developed to detect gluconic acid in food. Under the optimal experimental condition, a linear range of 3.6 M to 900 M was obtained for gluconic acid with a limit of detection of 1.1 μM. The colorimetric method was rapid and robust with a low cost and can be applied to gluconic acid detection in food samples.

Mechanism of Excited State Double Proton Transfer in 2-Amino-3-Methoxypyridine and Acetic Acid Complex

2018 ◽  
Vol 35 (9) ◽  
pp. 098201 ◽  
Author(s):  
Qing-Chi Meng ◽  
Song-Qiu Yang ◽  
Guang-Hua Ren ◽  
Tian-Shu Chu
Keyword(s):  
Acetic Acid ◽  
Excited State ◽  
Proton Transfer ◽  
Acid Complex ◽  
Double Proton Transfer

scholarly journals Visual inspection of cervix with acetic acid as a feasible screening test for cervical neoplasia among women attending at OPD in Rajshahi Medical College Hospital

KYAMC Journal ◽  
2018 ◽  
Vol 9 (2) ◽  
pp. 56-60
Author(s):  
Nahid Yusuf ◽  
Md Ahmed Ali ◽  
Nazmun Nahar ◽  
Shipra Chaudhury ◽  
Md Zillur Rahman
Keyword(s):  
Acetic Acid ◽  
Predictive Value ◽  
Urban Areas ◽  
Visual Inspection ◽  
Pap Smear ◽  
Low Cost ◽  
Low Grade ◽  
College Hospital ◽  
Health Care Centre ◽  
Simple Method

Background: Visual inspection of cervix after application of 3-5% acetic acid (VIA) is a potential alternative to Pap smear cytology for screening of cervical cancer in resource poor settings.Objectives: This study was to evaluate the performance of visual inspection based screening approach in the detection of precancerous and early cancerous lesions of the cervix.Materials & Methods: VIA was carried out in 540 eligible women attending Gynae OPD. Detection of well-defined, opaque, acetowhite lesion close to squamocolumnar junction or in transitional zone of the cervix constituted positive VIA. All screened women evaluated by colposcopy and biopsy were taken from colposcopically suspected areas. The final diagnosis was based on histology.Results: Out of 540 patients, 328 were VIA negative and 212 were VIA positive. Colposcopy showed normal results in 340 cases, low grade CIN in 138 cases, high grade CIN in 44 cases and cancer in 18 cases. There were biopsy proven chronic cervicitis and metaplastic changes in 423 cases, CIN I in 66 cases, CIN II in 25 cases, CIN III / carcinoma-in-situ in 5 cases. The sensitivity of VIA was 74.36%, specificity 70.45%, positive predictive value 41.04%, & negative predictive value 90.85%.Conclusion: VIA can differentiate a normal cervix from a precancerous cervix with reasonable accuracy. As it is low cost and simple method, it can be set in any hospital or any health care centre of rural or urban areas of poor resource settings.KYAMC Journal Vol. 9, No.-2, July 2018, Page 56-60

A Total Synthesis of Yellowish Aphid Pigment Furanaphin through Fries Rearrangement Assisted by Boron Trifluoride-Acetic Acid Complex

Synlett ◽  
2012 ◽  
Vol 23 (12) ◽  
pp. 1789-1792 ◽  
Author(s):  
Tetsuto Tsunoda ◽  
Taichi Nishimura ◽  
Takeki Iwata ◽  
Hironori Maegawa ◽  
Takeshi Nishii ◽  
...  
Keyword(s):  
Acetic Acid ◽  
Total Synthesis ◽  
Boron Trifluoride ◽  
Acid Complex ◽  
Fries Rearrangement
Sign in / Sign up

Export Citation Format

Share Document