1
|
Kim DS, Yoon YI, Kim BK, Choudhury A, Kulkarni A, Park JY, Kim J, Sinn DH, Joo DJ, Choi Y, Lee JH, Choi HJ, Yoon KT, Yim SY, Park CS, Kim DG, Lee HW, Choi WM, Chon YE, Kang WH, Rhu J, Lee JG, Cho Y, Sung PS, Lee HA, Kim JH, Bae SH, Yang JM, Suh KS, Al Mahtab M, Tan SS, Abbas Z, Shresta A, Alam S, Arora A, Kumar A, Rathi P, Bhavani R, Panackel C, Lee KC, Li J, Yu ML, George J, Tanwandee T, Hsieh SY, Yong CC, Rela M, Lin HC, Omata M, Sarin SK. Asian Pacific Association for the Study of the Liver clinical practice guidelines on liver transplantation. Hepatol Int 2024; 18:299-383. [PMID: 38416312 DOI: 10.1007/s12072-023-10629-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/15/2023] [Accepted: 12/18/2023] [Indexed: 02/29/2024]
Abstract
Liver transplantation is a highly complex and challenging field of clinical practice. Although it was originally developed in western countries, it has been further advanced in Asian countries through the use of living donor liver transplantation. This method of transplantation is the only available option in many countries in the Asia-Pacific region due to the lack of deceased organ donation. As a result of this clinical situation, there is a growing need for guidelines that are specific to the Asia-Pacific region. These guidelines provide comprehensive recommendations for evidence-based management throughout the entire process of liver transplantation, covering both deceased and living donor liver transplantation. In addition, the development of these guidelines has been a collaborative effort between medical professionals from various countries in the region. This has allowed for the inclusion of diverse perspectives and experiences, leading to a more comprehensive and effective set of guidelines.
Collapse
Affiliation(s)
- Dong-Sik Kim
- Department of Surgery, Korea University College of Medicine, Seoul, Republic of Korea
| | - Young-In Yoon
- Division of Hepatobiliary Surgery and Liver Transplantation, Department of Surgery, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Republic of Korea
| | - Beom Kyung Kim
- Department of Internal Medicine, Yonsei University College of Medicine, Seoul, Republic of Korea
| | | | | | - Jun Yong Park
- Department of Internal Medicine, Yonsei University College of Medicine, Seoul, Republic of Korea
| | - Jongman Kim
- Department of Surgery, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Republic of Korea
| | - Dong Hyun Sinn
- Department of Medicine, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Republic of Korea
| | - Dong Jin Joo
- Department of Surgery, Yonsei University College of Medicine, Seoul, Republic of Korea
| | - YoungRok Choi
- Department of Surgery, Seoul National University Hospital, Seoul National University College of Medicine, Seoul, Republic of Korea
| | - Jeong-Hoon Lee
- Department of Internal Medicine and Liver Research Institute, Seoul National University College of Medicine, Seoul, Republic of Korea
| | - Ho Joong Choi
- Department of Surgery, Seoul St. Mary's Hospital, College of Medicine, The Catholic University of Korea, Seoul, Republic of Korea
| | - Ki Tae Yoon
- Department of Internal Medicine, Pusan National University College of Medicine, Yangsan, Republic of Korea
| | - Sun Young Yim
- Department of Internal Medicine, Korea University College of Medicine, Seoul, Republic of Korea
| | - Cheon-Soo Park
- Department of Surgery, Eunpyeong St. Mary's Hospital, College of Medicine, The Catholic University of Korea, Seoul, Republic of Korea
| | - Deok-Gie Kim
- Department of Surgery, Yonsei University College of Medicine, Seoul, Republic of Korea
| | - Hae Won Lee
- Department of Surgery, Seoul National University Bundang Hospital, Seoul National University College of Medicine, Seongnam, Republic of Korea
| | - Won-Mook Choi
- Department of Gastroenterology, Liver Center, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Republic of Korea
| | - Young Eun Chon
- Department of Internal Medicine, CHA Bundang Medical Center, CHA University, Seongnam, Republic of Korea
| | - Woo-Hyoung Kang
- Division of Hepatobiliary Surgery and Liver Transplantation, Department of Surgery, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Republic of Korea
| | - Jinsoo Rhu
- Department of Surgery, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Republic of Korea
| | - Jae Geun Lee
- Department of Surgery, Yonsei University College of Medicine, Seoul, Republic of Korea
| | - Yuri Cho
- Center for Liver and Pancreatobiliary Cancer, National Cancer Center, Ilsan, Republic of Korea
| | - Pil Soo Sung
- Department of Internal Medicine, College of Medicine, The Catholic University of Korea, Seoul, Republic of Korea
| | - Han Ah Lee
- Department of Internal Medicine, Ewha Womans University, Seoul, Republic of Korea
| | - Ji Hoon Kim
- Department of Internal Medicine, Korea University College of Medicine, Seoul, Republic of Korea
| | - Si Hyun Bae
- Department of Internal Medicine, College of Medicine, The Catholic University of Korea, Seoul, Republic of Korea
| | - Jin Mo Yang
- Department of Internal Medicine, College of Medicine, The Catholic University of Korea, Seoul, Republic of Korea.
| | - Kyung-Suk Suh
- Department of Surgery, Seoul National University Hospital, Seoul National University College of Medicine, Seoul, Republic of Korea.
| | - Mamun Al Mahtab
- Department of Hepatology, Bangabandhu Sheikh Mujib Medical University, Dhaka, Bangladesh
| | - Soek Siam Tan
- Department of Medicine, Hospital Selayang, Batu Caves, Selangor, Malaysia
| | - Zaigham Abbas
- Sindh Institute of Urology and Transplantation, Karachi, Pakistan
| | - Ananta Shresta
- Department of Hepatology, Alka Hospital, Lalitpur, Nepal
| | - Shahinul Alam
- Crescent Gastroliver and General Hospital, Dhaka, Bangladesh
| | - Anil Arora
- Department of Gastroenterology and Hepatology, Sir Ganga Ram Hospital New Delhi, New Delhi, India
| | - Ashish Kumar
- Department of Gastroenterology and Hepatology, Sir Ganga Ram Hospital New Delhi, New Delhi, India
| | - Pravin Rathi
- TN Medical College and BYL Nair Hospital, Mumbai, India
| | - Ruveena Bhavani
- University of Malaya Medical Centre, Petaling Jaya, Selangor, Malaysia
| | | | - Kuei Chuan Lee
- Division of Gastroenterology and Hepatology, Department of Medicine, Taipei Veterans General Hospital, Taipei, Taiwan
| | - Jun Li
- College of Medicine, Zhejiang University, Hangzhou, China
| | - Ming-Lung Yu
- Department of Medicine, Kaohsiung Medical University, Kaohsiung, Taiwan
| | | | | | | | | | | | - H C Lin
- Endoscopy Center for Diagnosis and Treatment, Taipei Veterans General Hospital, Taipei, Taiwan
| | - Masao Omata
- Department of Gastroenterology, Yamanashi Central Hospital, Yamanashi, Japan
- University of Tokyo, Bunkyo City, Japan
| | | |
Collapse
|
2
|
Bhavani R, Vasanth K. Brain image fusion-based tumour detection using grey level co-occurrence matrix Tamura feature extraction with backpropagation network classification. Math Biosci Eng 2023; 20:8727-8744. [PMID: 37161219 DOI: 10.3934/mbe.2023383] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/11/2023]
Abstract
Most challenging task in medical image analysis is the detection of brain tumours, which can be accomplished by methodologies such as MRI, CT and PET. MRI and CT images are chosen and fused after preprocessing and SWT-based decomposition stage to increase efficiency. The fused image is obtained through ISWT. Further, its features are extracted through the GLCM-Tamura method and fed to the BPN classifier. Will employ supervised learning with a non-knowledge-based classifier for picture classification. The classifier utilized Trained databases of the tumour as benign or malignant from which the tumour region is segmented via k-means clustering. After the software needs to be implemented, the health status of the patients is notified through GSM. Our method integrates image fusion, feature extraction, and classification to distinguish and further segment the tumour-affected area and to acknowledge the affected person. The experimental analysis has been carried out regarding accuracy, precision, recall, F-1 score, RMSE and MAP.
Collapse
Affiliation(s)
- R Bhavani
- Department of ECE, Sathyabama Institute of Science and Technology, Chennai 600119, India
| | - K Vasanth
- Department of ECE, Vidya Jyothi Institute of Technology, Hyderabad 500075, India
| |
Collapse
|
3
|
Kanagathara N, Bhavani R, Lo AY, Marchewka M, Janczak J. Structural, vibrational characterization and DFT calculations of urea: DL-malic acid (1:1) – co-crystal. J Mol Struct 2022. [DOI: 10.1016/j.molstruc.2022.133930] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
|
4
|
Thakare A, Bhende M, Tesema M, Dighriri M, Bhavani R, Mahmoud A. An Intelligent Classification System for Cancer Detection Based on DNA Methylation Using ML and Semantic Knowledge in Healthcare. Comput Intell Neurosci 2022; 2022:4334852. [PMID: 38501034 PMCID: PMC10948228 DOI: 10.1155/2022/4334852] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 07/24/2022] [Revised: 09/01/2022] [Accepted: 09/10/2022] [Indexed: 03/20/2024]
Abstract
To consistently assess a patient's internal and external wellness and diagnose chronic conditions like cancer, Alzheimer's disease, and cardiovascular disease, wearable sensing devices are being used. Wearable technologies and networking websites have become incredibly common in the medical sector in recent times. The condition of a patient's health can be influenced by a number of factors, including psychological response, emotional stability, and anxiety levels, which can be evaluated using social network analysis based on graph theory-based techniques and these ideas, known as "social network analysis" (SNA) are used to study relationship phenomena. Therefore, numerous uses for SNA in health research are possible, ranging from social science to exact science. For example, it can be used to research cooperative networks of healthcare providers and hazard-prone behaviors, infectious disease transmission, and the spread of initiatives for health promotion and prevention. Recently, a number of machine learning-based healthcare solutions have been proposed to track chronic illnesses utilizing data from social networks and wearable monitoring devices. In our suggested approach, we are using an intelligent system with the assistance of wearable sensors for the classification of cancer based on DNA methylation, an important epigenetic process in the human genome that controls gene expression and has been connected to a number of health issues. A mixed-sampling imbalanced data ensemble classification technique is created with the help of biomedical sensors to address the problem of class imbalance and high dimensionality in the Cancer Genome Atlas (TCGA) massive data. This technique is based on the Intelligent Synthetic Minority Oversampling (SMOTE) algorithm. The false-negative rate significantly rises as a result of this, to give a larger data set, a new minority class sample will be first obtained. The noise created during the sample expansion process is actually any data that has been acquired, preserved, or altered in a way that prevents the system that initially conceived it from accessing or utilizing it. Noisy data boosts the amount of space needed excessively and can also drastically influence the findings of any data collection investigation and therefore can also affect the sample sets of one or the other class, resulting in the class imbalance which acts as a common problem in ML datasets. The Tomek Link method is then used to eliminate this noise, producing a reasonably balanced data set. Each layer selects two random forest structures using the cascading forest structure of the deep forest (GC-Forest) algorithm to increase the generalization ability of the model and create the final classification model. Experiments using DNA methylation data collected by employing biosensors from six tumor patients reveal that the mixed-sampling unbalanced data ensemble classification technique may increase the sensitivity to the minority class while maintaining the majority class's classification accuracy.
Collapse
Affiliation(s)
- Anuradha Thakare
- Department of Computer Engineering, Pimpri Chinchwad College of Engineering, Pune, India
| | - Manisha Bhende
- Marathwada Mitra Mandal's Institute of Technology, Pune, India
| | - Mulugeta Tesema
- Department of Chemistry (Analytical), College of Natural and Computational Sciences, Dambi Dollo University, Dambi Dollo, Oromia Region, Ethiopia
| | - Mohammed Dighriri
- Department of Basic Sciences and General Requirements -IT skills, Fakeeh College for Medical Sciences (FCMS), Jeddah, Saudi Arabia
| | - R. Bhavani
- Department of CSE, Saveetha School of Engineering, Saveetha Institute of Medical and Technical Sciences, Chennai 602105, India
| | - Amena Mahmoud
- Computer Science Department, Faculty of Computers and Information, Kafrelsheikh University, Kafr El Sheikh, Egypt
| |
Collapse
|
5
|
Bhavani R, Kanagathara N, Marchewka M, Janczak J. Structural and spectroscopic characterization of the products formed in aqueous solution of hydrazine and maleic acid. J Mol Struct 2022. [DOI: 10.1016/j.molstruc.2022.134077] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/14/2022]
|
6
|
Rita MRH, Deepa M, Gitanjali VC, Tinu SR, Subbulakshmi B, Sujitha D, Palthya G, Saradha M, Vedhavalli T, Sowmiya B, Akalya R, Mathivadhani LS, Uma M, Bhavani R, Violet JR. Lagophthalmos: An etiological lookout to frame the decision for management. Indian J Ophthalmol 2022; 70:3077-3082. [PMID: 35918976 PMCID: PMC9672712 DOI: 10.4103/ijo.ijo_3017_21] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022] Open
Abstract
Purpose: To describe the etiology, clinical profile, duration of lagophthalmos cases and thereby, framing a decision for the management based on the severity of Exposure keratitis (EK), Facial palsy (FP) with each etiology and to describe the outcome of the management options. Methods: The method was a prospective review of 120 lagophthalmos cases treated at a single tertiary center from January 2018 to January 2019. The main outcome measures were analysing the association between age, etiology, duration and management of lagophthalmos. Results: Of the 120 patients studied, paralytic etiology was noted in 86 and eyelid etiology in 34 patients. The percentage of various lagophthalmos etiology documented were Bell’s palsy (35.83%), lagophthalmos in ICU patients (15%), traumatic facial palsy(FP) (10.80%), stroke associated FP (6.67%), infection associated FP (6.67%), iatrogenic FP, cicatricial lagophthalmos (5%), lagophthalmos post eyelid surgeries (5%), neoplastic FP(3.33%), congenital FP (1.67%), proptosis induced lagophthalmos (1.67%), floppy eyelid syndrome induced lagophthalmos (0.83%) and lid coloboma associated lagophthalmos (0.83%). A statistically significant correlation was noted between exposure keratitis and age, with an increased prevalence age advances. The management showed significant variation with individual etiology, with some etiologies unquestionably requiring surgical management. Surgical management is crucial as the duration of lagophthalmos increases more than 6 weeks, EK involving pupillary axis and poor FP recovery. Conclusion: This study concludes that the conservative management was sufficient in all cases when the duration is less than 1 week, Exposure keratitis not involving the pupillary axis (EK< Grade II) and FP with good functional recovery ( FP < Grade III). The predominant causes being Bell’s palsy, lagophthalmos in ICU patients and vascular FP. Whereas, cases with poor functional recovery of facial palsy(FP) and permanent eyelid deformation require definitive surgical management like Traumatic FP & cicatricial lagophthalmos.
Collapse
Affiliation(s)
- M Rani H Rita
- Department of Ophthalmology, Tirunelveli Medical College Hospital, Tirunelveli, Tamil Nadu, India
| | - M Deepa
- Department of Ophthalmology, Tirunelveli Medical College Hospital, Tirunelveli, Tamil Nadu, India
| | - V C Gitanjali
- Department of Ophthalmology, Tirunelveli Medical College Hospital, Tirunelveli, Tamil Nadu, India
| | - S R Tinu
- Department of Ophthalmology, Tirunelveli Medical College Hospital, Tirunelveli, Tamil Nadu, India
| | - B Subbulakshmi
- Department of Ophthalmology, Tirunelveli Medical College Hospital, Tirunelveli, Tamil Nadu, India
| | - D Sujitha
- Department of Ophthalmology, Tirunelveli Medical College Hospital, Tirunelveli, Tamil Nadu, India
| | - Gopinayik Palthya
- Department of Ophthalmology, Tirunelveli Medical College Hospital, Tirunelveli, Tamil Nadu, India
| | - M Saradha
- Department of Ophthalmology, Tirunelveli Medical College Hospital, Tirunelveli, Tamil Nadu, India
| | - T Vedhavalli
- Department of Ophthalmology, Tirunelveli Medical College Hospital, Tirunelveli, Tamil Nadu, India
| | - B Sowmiya
- Department of Ophthalmology, Tirunelveli Medical College Hospital, Tirunelveli, Tamil Nadu, India
| | - R Akalya
- Department of Ophthalmology, Tirunelveli Medical College Hospital, Tirunelveli, Tamil Nadu, India
| | - L S Mathivadhani
- Department of Ophthalmology, Tirunelveli Medical College Hospital, Tirunelveli, Tamil Nadu, India
| | - M Uma
- Department of Ophthalmology, Tirunelveli Medical College Hospital, Tirunelveli, Tamil Nadu, India
| | - R Bhavani
- Research Analyst, Queen Mary's College, Tamil Nadu, India
| | - Joy R Violet
- Research Analyst, Queen Mary's College, Tamil Nadu, India
| |
Collapse
|
7
|
Saxena K, Zamani AS, Bhavani R, Sagar KVD, Bangare PM, Ashwini S, Rahin SA. Appropriate Supervised Machine Learning Techniques for Mesothelioma Detection and Cure. Biomed Res Int 2022; 2022:2318101. [PMID: 35845952 PMCID: PMC9283031 DOI: 10.1155/2022/2318101] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/18/2022] [Accepted: 06/20/2022] [Indexed: 11/17/2022]
Abstract
Mesothelioma is a dangerous, violent cancer, which forms a protecting layer around inner tissues such as the lungs, stomach, and heart. We investigate numerous AI methodologies and consider the exact DM conclusion outcomes in this study, which focuses on DM determination. K-nearest neighborhood, linear-discriminant analysis, Naive Bayes, decision-tree, random forest, support vector machine, and logistic regression analyses have been used in clinical decision support systems in the detection of mesothelioma. To test the accuracy of the evaluated categorizers, the researchers used a dataset of 350 instances with 35 highlights and six execution measures. LDA, NB, KNN, SVM, DT, LogR, and RF have precisions of 65%, 70%, 92%, 100%, 100%, 100%, and 100%, correspondingly. In count, the calculated complication of individual approaches has been evaluated. Every process is chosen on the basis of its characterization, exactness, and calculated complications. SVM, DT, LogR, and RF outclass the others and, unexpectedly, earlier research.
Collapse
Affiliation(s)
- Komal Saxena
- Amity Institute of Information Technology, Amity University, Noida, Uttar Pradesh, India
| | - Abu Sarwar Zamani
- Department of Computer and Self Development, Preparatory Year Deanship, Prince Sattam Bin Abdulaziz University, Al-Kharj, Saudi Arabia
| | - R. Bhavani
- Institute of Computer Science and Engineering, Saveetha School of Engineering, Saveetha Institute of Medical and Technical Sciences, Chennai 600124, India
| | - K. V. Daya Sagar
- Electronics and Computer Science, Koneru Lakshmaiah Education Foundation, Vaddeswaram, Guntur, Andhra Pradesh, India
| | - Pushpa M. Bangare
- Department of E&TC, Sinhgad College of Engineering, Savitribai Phule Pune University, Pune, India
| | - S. Ashwini
- Computer Science and Engineering, Saveetha School of Engineering, Saveetha Institute of Medical and Technical Sciences, Tamilnadu, India
| | | |
Collapse
|
8
|
Bhavani R, Prakash V, Chitra K. An efficient clustering approach for fair semantic web content retrieval via tri-level ontology construction model with hybrid dragonfly algorithm. ACTA ACUST UNITED AC 2019. [DOI: 10.1504/ijbidm.2019.096836] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
|
9
|
Vijayalakshmi J, Koshy T, Kaur H, Mary FA, Selvi R, Parvathi VD, Bhavani R, Jayanth RV, Venkatchalam P, Paul SFD. Cytogenetic Analysis of Patients with Primary Amenorrhea. INT J HUM GENET 2017. [DOI: 10.1080/09723757.2010.11886087] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Affiliation(s)
- J. Vijayalakshmi
- Department of Human Genetics, Sri Ramachandra University, Porur, Chennai, Tamil Nadu, India
| | - Teena Koshy
- Department of Human Genetics, Sri Ramachandra University, Porur, Chennai, Tamil Nadu, India
| | - Harpreet Kaur
- Department of Human Genetics, Sri Ramachandra University, Porur, Chennai, Tamil Nadu, India
| | - F. Andrea Mary
- Department of Human Genetics, Sri Ramachandra University, Porur, Chennai, Tamil Nadu, India
| | - R. Selvi
- Department of Human Genetics, Sri Ramachandra University, Porur, Chennai, Tamil Nadu, India
| | - V. Deepa Parvathi
- Department of Human Genetics, Sri Ramachandra University, Porur, Chennai, Tamil Nadu, India
| | - R. Bhavani
- Department of Human Genetics, Sri Ramachandra University, Porur, Chennai, Tamil Nadu, India
| | - R. Vikram Jayanth
- Department of Human Genetics, Sri Ramachandra University, Porur, Chennai, Tamil Nadu, India
| | - P. Venkatchalam
- Department of Human Genetics, Sri Ramachandra University, Porur, Chennai, Tamil Nadu, India
| | - Solomon F. D. Paul
- Department of Human Genetics, Sri Ramachandra University, Porur, Chennai, Tamil Nadu, India
| |
Collapse
|
10
|
Bhavani R, Sadasivam GS. A novel feature selection based on apriori property and correlation analysis for protein sequence classification using MapReduce. INT J DATA MIN BIOIN 2017. [DOI: 10.1504/ijdmb.2017.085282] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
|
11
|
Sudha Sadasivam G, Bhavani R. A novel feature selection based on apriori property and correlation analysis for protein sequence classification using MapReduce. INT J DATA MIN BIOIN 2017. [DOI: 10.1504/ijdmb.2017.10006248] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
|
12
|
Bhavani R, Sivasamy A. Sonocatalytic degradation of malachite green oxalate by a semiconductor metal oxide nanocatalyst. Ecotoxicol Environ Saf 2016; 134:403-411. [PMID: 26552649 DOI: 10.1016/j.ecoenv.2015.10.029] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/10/2014] [Revised: 10/05/2015] [Accepted: 10/26/2015] [Indexed: 06/05/2023]
Abstract
Advanced Oxidation Process (AOP) technologies are considered to be better technique for the degradation or mineralization of many recalcitrant compounds and pollutants. In the present study heterogeneous sonocatalytic degradation of a model organic compound such as Malachite green oxalate (MGO) was carried out in the aqueous phase. Zinc oxide nanorods were prepared by precipitation method employing zinc acetates as precursors and were characterized by FT-IR, XRD, FE-SEM and EDAX analysis. Degradation of MGO in the aqueous phase was studied in detail under the sonocatalytic process. Effects of pH, dye concentration, oxidant concentration, kinetics and effect of electrolytes on dye degradation were carried out to check the efficiency of the sonocatalyst. Effect of energy input on the degradation processes was also investigated. The degradation of dye molecules were monitored by UV-visible spectrophotometer and Chemical Oxygen demand (COD). The dye molecules were readily degraded at above 90% in the pH range 5.0-7.0 under ultrasound with zinc oxide nanorods. The interference of electrolytes like NaCl, KCl, Na2CO3, NaHCO3 and MgSO4 on the degradation of dye molecules were also studied on the sonocatalytic degradation of MGO. From the kinetic studies it was observed that at lower initial concentration of dye molecules the degradation efficiency was above 90%. The rate of the reaction decreased on increasing the initial dye concentrations of the dye molecules. It was observed that the complete mineralization of dye molecules was achieved without the formation of toxic by-products. The reusability of the catalyst also showed the effective degradation of the dye molecules up to five cycles without loss of the catalytic activities.
Collapse
Affiliation(s)
- R Bhavani
- Chemical Engineering Area, CSIR-Central Leather Research Institute, Adyar, Chennai 600020, India
| | - A Sivasamy
- Chemical Engineering Area, CSIR-Central Leather Research Institute, Adyar, Chennai 600020, India.
| |
Collapse
|
13
|
Puviarasan N, Bhavani R. A new indexing technique to retrieve images using integration of colour-size, texture and shape features. IJAPR 2015. [DOI: 10.1504/ijapr.2015.073847] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
|
14
|
|
15
|
|
16
|
Maheshwari R, Bhavani R, Dhathathreyan A. Solid–liquid interfacial energy as a tool to estimate shifts in isoelectric points of adsorbed proteins on solid surfaces. J Colloid Interface Sci 2006; 293:500-4. [PMID: 16102778 DOI: 10.1016/j.jcis.2005.06.076] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2005] [Revised: 05/10/2005] [Accepted: 06/24/2005] [Indexed: 11/16/2022]
Abstract
This work reports the estimation of isoelectric points (pIs) of adsorbed amino acids and proteins on solid surfaces in the pH range between 3.5-11.0 from a measurement of solid/liquid interfacial energy. The values thus obtained are compared with the pIs determined in solution phase by other methods. Both glass and Teflon have been chosen as model solid surfaces. Close agreement between the reference pI values, obtained by the capillary isoelectric focusing and those obtained at solid/liquid interface is observed within an average difference of 0.04-0.08 pH unit when the pIs are above the pI of glass. For systems whose pIs are far away from that of glass (either in the acidic or highly alkaline range), a large shift in the isoelectric point is observed. In case of Teflon the pIs are closer to the reported values than at glass/liquid interface. This could be due to the fact that Teflon being a hydrophobic surface, its surface is dominated by dispersive forces, which may not be seriously affected by pH changes. The shift in the values at solid/liquid interface compared to that in solution have been examined using an 'image charge approach.'
Collapse
Affiliation(s)
- R Maheshwari
- Chemical Laboratory, CLRI, Adyar, Chennai 600020, India
| | | | | |
Collapse
|