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Babu S. Engineering Fronts: Medicine and Health. DRUG FUTURE 2020. [DOI: 10.1358/dof.2020.45.7.3182911] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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Babu S. New product intros [almonertinib, bempedoic acid (first-in-class), cetirizine hydrochloride (new formulation), calaspargase pegol-mknl, eptinezumab-jjmr, lumateperone tosylate, luspatercept (new indication), remimazolam tosylate, teprotumumab-trbw]. Drugs Today (Barc) 2020. [DOI: 10.1358/dot.2020.56.5.3160353] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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Babu S. Research Fronts 2019: Clinical Medicine and Biological Sciences. DRUG FUTURE 2020. [DOI: 10.1358/dof.2020.45.4.3151952] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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Goyal S, Rudresha A, Lokanatha D, Jacob L, Babu S, Lokesh K, Rajeev L, Smitha S, Sansar B. Differences in disease characteristics and survival outcomes of follicular lymphoma in young adults and older population: An institutional analysis. Ann Oncol 2019. [DOI: 10.1093/annonc/mdz427.017] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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Saldanha S, N L, D L, Jacob L, Babu S, H R, Lakkavalli R, Thottian A. EP1.16-37 Correlation of Serum Albumin and CRP Levels with Chemotherapy Toxicity in Patients of Metastatic Lung Cancer. J Thorac Oncol 2019. [DOI: 10.1016/j.jtho.2019.08.2402] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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Hassan S, D L, Jacob L, Babu S, Kn L, Ah R, Lk R, Saldanha S, Thottian A. Socioeconomic and Administrative Factors Associated with Healthcare Delay and Treatment of Esophageal and Gastric Carcinoma: Experience at a Tertiary Care Centre in a Developing Country. Ann Oncol 2019. [DOI: 10.1093/annonc/mdz155.276] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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Kathamuthu GR, Moideen K, Baskaran D, Sekar G, Rathinam S, Bharathi VJ, Ganeshan GR, Babu S. Tuberculous lymphadenitis is associated with altered levels of circulating angiogenic factors. Int J Tuberc Lung Dis 2019; 22:557-566. [PMID: 29663962 DOI: 10.5588/ijtld.17.0609] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022] Open
Abstract
BACKGROUND Angiogenic factors are important in granuloma formation and serve as biomarkers in pulmonary tuberculosis (PTB). The relationship between these markers and tuberculous lymphadenitis (TBL) is not known. OBJECTIVE AND DESIGN To examine the association of vascular endothelial growth factor (VEGF) and angiopoietin (Ang) family molecules in TBL, we measured systemic levels of VEGF-A, C, D, R1 (VEGF-receptor 1), R2, R3, Ang-1, Ang-2 and TIE2 (tyrosine kinase with immunoglobulin-like and epidermal growth factor-like domains 2) levels in TBL, latent tuberculous infection (LTBI) and lymph node culture supernatants (VEGF-A, C and Ang-2) of the same TBL patients. RESULTS Circulating levels of VEGF-A and VEGF-C were significantly diminished, whereas VEGF-R2, R3, Ang-2 and TIE2 levels were significantly increased, in TBL. Likewise, VEGF-A, C and Ang-2 levels were significantly increased in lymph node supernatants compared with plasma in individuals with TBL. Receiver operating characteristic curve analysis showed that VEGF-C and VEGF-R2 markers clearly distinguished TBL from LTBI. Following treatment, VEGF-C and Ang-1 levels were significantly altered. No association was observed between angiogenic factors and culture grade or lymph node size, except for VEGF-A. VEGF-A was also significantly decreased in multiple lymph nodes compared with single lymph nodes. CONCLUSIONS Our data suggest that altered levels of circulating angiogenic factors in TBL might reflect underlying vasculo-endothelial dysfunction. Reversal of angiogenic markers after anti-tuberculosis treatment suggests that these angiogenic markers may serve as biomarkers of disease severity or response to treatment in TBL.
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Budde L, Vallurupalli A, Babu S, Lossos I, Alderuccio J, Chavez J, Eradat H, Holmes H, Hamadani M, Karur V, Olszewski A, Seymour E, Althaus B, Medeiros B, Li C, Kwan A, Wei M, Yin S, O'Hear C, Munoz J. ONGOING PHASE 1B/2 TRIALS OF MOSUNETUZUMAB INVESTIGATING NOVEL TREATMENT REGIMENS FOR PATIENTS WITH B-CELL NON-HODGKIN LYMPHOMA (NHL). Hematol Oncol 2019. [DOI: 10.1002/hon.12_2632] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Pitchai R, Babu S, Supraja P, Anjanayya S. Prediction of availability and integrity of cloud data using soft computing technique. Soft comput 2019. [DOI: 10.1007/s00500-019-04008-0] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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Bhatia S, Shukla A, Johnson D, Thatte U, Lawate P, Babu S, Rathi P, Khanna S, Sandeep MS, Rai V, Parchure N, Agrawal V. An Expert Review and Recommendations on the Rational Use of Proton Pump Inhibitors: Indian Perspective. THE JOURNAL OF THE ASSOCIATION OF PHYSICIANS OF INDIA 2019; 67:88-96. [PMID: 31309811] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
BACKGROUND Proton pump inhibitors (PPIs) are the mainstay of treatment for acid peptic diseases (APDs), but are often irrationally prescribed in clinical practice. Appropriate prescription of PPIs is needed to optimize outcomes, and minimize risks and cost burden on the healthcare system. OBJECTIVE To review available literature on efficacy and safety of proton pump inhibitors (PPIs) and give recommendations for rational use of PPIs from an Indian perspective. METHODS Twelve healthcare professionals (9 gastroenterologists, 1 cardiologist, 1 orthopedist, 1 clinical pharmacologist) comprised the expert group; members disclosed conflicts of interest. The creation of the expert review was through a process that included meetings (in-person, online, telephone) where each professional contributed their experiences with regards to efficacy and safety of PPIs. Articles published between the years 2000 and 2017 were reviewed for evaluation of safety and efficacy of PPIs in treatment of various APDs. CONCLUSION This expert review provides key recommendations for decision making in order to minimize the irrational use of PPIs. Some significant recommendations include: patients with GERD and acid-related complications should take a PPI for minimum 12 weeks for healing of esophagitis, and for maximum up to 48 weeks for symptom control. Patients with Barrett's esophagus should take long-term PPI. Patients at high risk for ulcer-related bleeding from NSAIDs including aspirin should take a PPI if they continue to take NSAIDs. Best practice recommendations are meant to merely assist with decision making in conjunction with patients' clinical history, and are not intended to dictate mandatory rules.
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Hoffman J, Chakrabarti J, Wainberg ZA, Plotka A, Babu S, Milillo Naraine A, Kanamori D, Moroose R, Nguyen L, Wang D. Abstract P3-14-07: Evaluation of the effects of talazoparib on QT interval prolongation. Cancer Res 2019. [DOI: 10.1158/1538-7445.sabcs18-p3-14-07] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Abstract
Background: Talazoparib (TAL), an oral poly ADP-ribose polymerase inhibitor, is under investigation in multiple oncologic clinical trials and has been submitted to the US FDA for use in patients (pts) with germline BRCA-mutated, HER2-negative advanced breast cancer.
International Conference on Harmonisation guidance recommends all new drugs be evaluated for effects on cardiac repolarization in a well-controlled clinical study. For drugs for which such evaluation cannot be conducted in healthy volunteers (eg, most anticancer agents), collection of robust corrected QT (QTc) interval data from a dedicated QTc study (hybrid thorough QT/QTc study) in pts is required in the registration dossier. The effect of steady-state (ss) TAL (1 mg once daily) on cardiac repolarization in pts with advanced solid tumors was evaluated in an open-label phase 1 study (NCT03042910).
Methods: Continuous 12-lead electrocardiogram (ECG) recordings were collected at baseline (Day -1); time-matched pharmacokinetic (PK) samples and continuous ECG recordings were obtained on Days 1, 2, and 22 (when TAL concentrations achieved ss). On Day -1, pts had continuous 12-lead ECG recording starting at Time 0 (Day 1 dosing time) for 6 hrs. On Days 1 and 22, ECG recording started 45 min before TAL administration and continued for 6 hrs post dose and blood samples for PK were collected before dose and at 1, 2, 4, and 6 hrs post dose. On Day 2, a 30-min ECG recording and a PK sample were obtained before dose at Time 0.
Continuous ECG recordings were submitted to a central laboratory; triplicate 10-sec ECGs were extracted from a 5-min extraction window beginning 15 min before each PK collection time. ECG measurements were reported via blinded manual adjudication process and included PR interval, QT interval, RR interval, and QRS complex. The QT interval was corrected for effect of heart rate using Fridericia's correction (QTcF) and Bazett's correction (QTcB).
The estimate of change from time-matched baseline and its 2-sided 90% confidence interval (CI) was calculated for each nominal time point using PROC MEANS. Additionally, a prespecified PK/pharmacodynamic (PD) model was used to describe the relationship between plasma TAL concentrations ([TAL]) and QTc. The prespecified linear mixed-effects model included [TAL], time (categorical), and treatment with random pt effects on [TAL] and the intercept. If the upper bounds (UB) of 1-sided 95% CIs of time-matched ΔQTc for all ECG time points were <20 msec and the UB of 1-sided 95% CIs of the predicted ΔQTc at the mean ss maximum [TAL] was <20 msec, the effect of TAL on QTc was not of clinical relevance.
Results: 37 of 38 pts enrolled received TAL and were included in the ECG and PK/PD analyses. No pts had a postbaseline absolute maximum QTcF or QTcB ≥500 msec or ΔQTc ≥60 msec. The UB of the 1-sided 95% CI for the time-matched ΔQTcF and ΔQTcB were <12 msec at all nominal ECG time points. In the PK/PD analysis, the slopes (95% CI) of QTcF-[TAL] and QTcB-[TAL] relationships were -0.14 (-0.78 to 0.50) msec/ng/mL and -0.24 (-0.88 to 0.41) msec/ng/mL, respectively, indicating that TAL did not have a concentration-dependent effect on QTcF or QTcB.
Conclusion: TAL does not have a clinically relevant effect on QTc.
Funding: Medivation LLC, acquired by Pfizer.
Citation Format: Hoffman J, Chakrabarti J, Wainberg ZA, Plotka A, Babu S, Milillo Naraine A, Kanamori D, Moroose R, Nguyen L, Wang D. Evaluation of the effects of talazoparib on QT interval prolongation [abstract]. In: Proceedings of the 2018 San Antonio Breast Cancer Symposium; 2018 Dec 4-8; San Antonio, TX. Philadelphia (PA): AACR; Cancer Res 2019;79(4 Suppl):Abstract nr P3-14-07.
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Patil AJ, Shirke B, Rao GB, Babu S, Quadros G. Record of a Few Pelagic Bird Sightings along Sindhudurg Coast, Maharashtra. AMBIENT SCIENCE 2019. [DOI: 10.21276/ambi.2019.06.2.nn01] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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Husain I, Sagar P, Shukla S, Babu S, Singhai A, Sankhwar SN, Husain N. The Significance of ERG and Androgen Receptor Expression in Adenocarcinoma Prostate. Kathmandu Univ Med J (KUMJ) 2018; 16:277-280. [PMID: 31729338] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Background Fusions of transmembrane protease, serine 2 (TMPRSS2) with erythroblast transformation specific transcription factors have been found in prostate cancer. The v-etserythroblastosis virus E26 oncogene homologue (ERG) is a proto-oncogene of the erythroblast transformation specific transcription factor family. TMPRSS2-ERG fusion is the most common molecular alteration present in about 50% of prostatic adenocarcinomas. Androgen receptor (AR) plays a key role in prostate development and is involved in the progression of prostate cancer. Objective To evaluate the significance of combined ERG and AR expression in cases of prostatic adenocarcinoma. Method The study was conducted at Dr. Ram Manohar Lohia Institute of Medical Sciences, Lucknow, Uttar Pradesh, India. Formalin fixed-paraffin embedded archival prostatic tissue specimens were obtained. A total of 10 cases of prostatic adenocarcinoma were included in the study. Immunohistochemistry for Androgen receptor was done by the standard protocol. Multiplex immunohistochemical staining was done for ERG+CK5 using a primary antibody cocktail of mouse and rabbit antibodies. Result Specific AR immunostaining was exclusively nuclear and was present in all 10 cases in varying intensity. Specific ERG immunostaining was nuclear and was present in seven cases (70%) and absent in three cases (30%). The three cases that were negative for ERG had a Gleason score of ≤ 6 and the AR staining was strong and present in about 90% of the cells. Gleason score was directly related to the ERG staining while AR staining was inversely related to the ERG staining. Conclusion The prognostic value of combined ERG and AR over-expression, its associated genes should be further investigated as potential therapeutic targets in prostate cancer progression. Preliminary data is being presented. Larger prospective studies with survival analysis are essential for prognostic significance.
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Anoop N, Babu S, Bharathidasan S, Nagarajan R. Status of raptors in the Moyar River Valley, Western Ghats, India. JOURNAL OF THREATENED TAXA 2018. [DOI: 10.11609/jott.3054.10.10.12317-12327] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022] Open
Abstract
This study examined the species composition and nest-tree characteristics of diurnal raptors in the tropical forests of Moyar Valley, Western Ghats between December 2012 and March 2013. We recorded 28 species of raptors including three species of vultures. Accipitridae was the dominant family comprising of 25 species followed by two from Falconidae and the monotypic Pandionidae. Among them, eight species fall under various threatened category: three Critically Endangered, one Endangered, two Vulnerable and two Near Threatened. The Critically Endangered Gyps bengalensis was frequently recorded during the survey (175 sightings) followed by Milvus migrans (39 sightings) and Haliastur indus (27 sightings). We located 53 active nests of four species of raptors, viz., Gyps bengalensis (42 nests), Nisaetus cirrhatus (4 nests), Haliastur indus (4 nests), and Milvus migrans (3 nests). A notable difference in the nest-tree characteristics among the sympatric raptors was observed. These results would be important to identify priority areas for developing future conservation and management programs for the long-term conservation of raptorial birds in the Western Ghats.
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Sasi kumar M, Rajeswara Reddy B, Babu S, Balakrishna A, Ratnakaram Y. Thermal, structural and spectroscopic properties of Pr3+-doped lead zinc borate glasses modified by alkali metal ions. JOURNAL OF TAIBAH UNIVERSITY FOR SCIENCE 2018. [DOI: 10.1016/j.jtusci.2016.04.004] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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Kumar NP, Velayutham B, Nair D, Babu S. Angiopoietins as biomarkers of disease severity and bacterial burden in pulmonary tuberculosis. Int J Tuberc Lung Dis 2018; 21:93-99. [PMID: 28157471 DOI: 10.5588/ijtld.16.0565] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022] Open
Abstract
BACKGROUND Circulating angiogenic factors of the vascular endothelial growth factor family are important biomarkers of disease severity in pulmonary tuberculosis (PTB). However, the role of angiopoietins, which are also involved in angiogenesis, in PTB is not known. OBJECTIVE AND DESIGN To examine the association of circulating angiopoietins with TB disease or latent tuberculous infection (LTBI), we examined the systemic levels of angiopoietin (Ang) 1, Ang 2 and Tie-2 receptor in individuals with PTB (n = 44), LTBI (n = 44) or no tuberculous infection (NTBI) (n = 44). RESULTS Circulating levels of Ang-1, Ang-2 and Tie-2 were significantly higher in PTB than in individuals with LTBI or NTBI. Moreover, Ang-1, Ang-2 and Tie-2 levels were significantly higher in PTB with bilateral disease. The levels of these factors also exhibited a significant positive relationship with bacterial burdens in PTB. Receiver operating characteristics curve analysis revealed Ang-2 as a marker distinguishing PTB from LTBI or NTBI. Finally, the circulating levels of Ang-1, Ang-2 and Tie-2 were significantly reduced following anti-tuberculosis chemotherapy. CONCLUSIONS Our data demonstrate that PTB is associated with elevated levels of circulating angiopoietins, possibly reflecting endothelial dysfunction. In addition, Ang-2 could prove useful as a biomarker to monitor disease severity, bacterial burden and therapeutic responses.
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Anandh U, Birajdar N, Kumar R, Babu S. Xanthogranulomatous Pyelonephritis: Intrahepatic and Intrathoracic Extension. Indian J Nephrol 2018; 28:468-471. [PMID: 30647503 PMCID: PMC6309392 DOI: 10.4103/ijn.ijn_213_17] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022] Open
Abstract
A 32-year-old female presented to us with worsening cough and expectoration, low-grade fever, and malaise for 3 months. She gave a history of pregnancy loss secondary to urinary tract infection (UTI) a year back. At that time, she was told to have an obstructive right renal calculus. She also had a history of recurrent UTI in the past 1 year. She had no other comorbidities. Her clinical evaluation revealed an enlarged right kidney and reduced air entry in the right hemithorax. Radiological investigations revealed a large right kidney invading into the inferior surface of the right lobe of the liver and the right pleural space. A clinical diagnosis of xanthogranulomatous pyelonephritis was made, and she was advised nephrectomy. Intraoperatively, the right kidney was found to invade both the right lobe of the liver and the right pleural cavity through a right diaphragmatic defect. Histopathology of the kidney revealed the presence of foamy histiocytes suggestive of xanthogranulomatous pyelonephritis. Invasive xanthogranulomatous pyelonephritis is known, however, invasion into the extra-abdominal structures has not been reported in the literature. Our case is a rare manifestation of a rare clinical entity – xanthogranulomatous pyelonephritis.
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Srinivasan R, Babu S, Gothandam KM. Accumulation of phytoene, a colorless carotenoid by inhibition of phytoene desaturase (PDS) gene in Dunaliella salina V-101. BIORESOURCE TECHNOLOGY 2017; 242:311-318. [PMID: 28347620 DOI: 10.1016/j.biortech.2017.03.042] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/26/2017] [Revised: 03/06/2017] [Accepted: 03/08/2017] [Indexed: 06/06/2023]
Abstract
The aim of this work was to study the accumulation of phytoene in Dunaliella salina V-101 by down-regulating its phytoene desaturase (PDS) gene expression using RNA interference and Antisense technology. RNAi and antisense constructs were introduced into the Dunaliella cells by Agrobacterium-mediated transformation. Among thirty-two transformants, six showed positive down-regulation of PDS expression with RNAi construct and five positive transformants were obtained using antisense construct. Characterization of PDS suppression was carried out using semi-quantitative RT-PCR and quantitative determination of phytoene as well as other carotenoids by HPLC. Both the RNAi and antisense lines showed a significant decrease in the expression levels of phytoene desaturase and carotenoid content compared to wild type cells. The RNAi line #5 showed maximum Phytoene content (108.34±22.34µg/100mg DCW) compared to other transgenic lines. These phytoene-accumulating phenotypes exhibited slower growth rates and were found to be sensitive to high light conditions.
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Rudresha A, Asati V, Kuntegowdanahalli L, Babu G, Lokanatha D, Jacob L, Babu S, Premalata C, Rajeev L, Lokesh K, Saldanha S, Patidar R. Role of prephase treatment prior to definitive chemotherapy in diffuse large B -cell lymphoma (DLBCL). Ann Oncol 2017. [DOI: 10.1093/annonc/mdx373.018] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Lokesh K, Chaudhuri T, Lakshmaiah K, Babu G, Lokanatha D, Jacob L, Babu S, Rudresha A, Rajeev L. Role of induction chemotherapy in locally advanced T4b oral cavity cancers: A single Institute experience. Ann Oncol 2017. [DOI: 10.1093/annonc/mdx374.031] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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Spigel D, McLeod M, Hussein M, Waterhouse D, Einhorn L, Horn L, Creelan B, Babu S, Leighl N, Couture F, Chandler J, Goss G, Keogh G, Garon E, Blankstein K, Daniel D, Mohamed M, Li A, Aanur N, Jotte R. Randomized results of fixed-duration (1-yr) vs continuous nivolumab in patients (pts) with advanced non-small cell lung cancer (NSCLC). Ann Oncol 2017. [DOI: 10.1093/annonc/mdx380.002] [Citation(s) in RCA: 62] [Impact Index Per Article: 8.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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Mathur A, Bhuvaneshwari M, Babu S, Chandrasekaran N, Mukherjee A. The effect of TiO2 nanoparticles on sulfate-reducing bacteria and their consortium under anaerobic conditions. JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING 2017; 5:3741-3748. [DOI: 10.1016/j.jece.2017.07.032] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/26/2023]
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Babu S, Ananthanarayanan N. EMOTE: Enhanced Minority Oversampling TEchnique. JOURNAL OF INTELLIGENT & FUZZY SYSTEMS 2017. [DOI: 10.3233/jifs-161114] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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Watchorn RE, Babu S, Lewis F, Calonje E, Taibjee SM. Paroxysmal purple palmar macules with a rare aetiology. Clin Exp Dermatol 2017; 42:561-563. [DOI: 10.1111/ced.13101] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 08/09/2016] [Indexed: 12/28/2022]
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Reddy Prasad V, Seshadri M, Babu S, Ratnakaram YC. Concentration-dependent studies of Nd 3+ -doped zinc phosphate glasses for NIR photoluminescence at 1.05 μm. LUMINESCENCE 2017; 32:443-451. [PMID: 27546167 DOI: 10.1002/bio.3200] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2016] [Revised: 06/12/2016] [Accepted: 07/08/2016] [Indexed: 11/10/2022]
Abstract
Nd3+ -doped lead-free zinc phosphate glasses with the chemical compositions (60-x) NH4 H2 PO4 + 20ZnO + 10BaF2 + 10NaF + xNd2 O3 (where x = 0.5, 1.0, 1.5, 2.0 and 2.5 mol%) were prepared using a melt quenching technique. Vibrational bands were assigned and clearly elucidated by Raman spectral profiles for all the glass samples. Judd-Ofelt (J-O) intensity parameters (Ωλ : λ = 2, 4, 6) were obtained from the spectral intensities of different absorption bands of Nd3+ ions. Radiative properties such as radiative transition probabilities (AR ), radiative lifetimes (τR ) and branching ratios (βR ) for different excited states were calculated using J-O parameters. The near infrared (NIR) photoluminescence spectra exhibited three emission bands (4 F3/2 level to 4 I13/2 , 4 I11/2 and 4 I9/2 states) for all the concentrations of Nd3+ ions. Various luminescence properties were studied by varying the Nd3+ concentration for the three spectral profiles. Fluorescence decay curves of the 4 F3/2 level were recorded. The energy transfer mechanism that leads to quenching of the 4 F3/2 state lifetimes was discussed at higher concentration of Nd3+ ions. These glasses are suggested as suitable hosts to produce efficient lasing action in NIR region at 1.05 μm.
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