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Saha P, Nithya R, Sarguna RM, Sen S. Optical and dielectric properties of divalent copper based double perovskite compound, Gd 2CuTiO 6. J Phys Condens Matter 2024; 36:275702. [PMID: 38537279 DOI: 10.1088/1361-648x/ad3874] [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] [Received: 11/21/2023] [Accepted: 03/27/2024] [Indexed: 04/06/2024]
Abstract
In this work, we have investigated high temperature dielectric properties and room temperature optical properties on rare earth ion based orthorhombic Gd2CuTiO6(GCTO). Optical properties like reflectance and band gap were determined from ultra-violet visible (UV-Vis) diffuse reflectance spectroscopy technique and photoluminescence (PL) spectrum. The compound exhibited substantial optical absorption and emission in the visible region. Our findings reveal the presence of an intermediate band, as evidenced by the difference between the band gap values obtained from the Tauc plot using the diffuse reflectance spectrum (3.07 eV) and the PL spectrum (2.4 eV). Furthermore, thermogravimetric analysis demonstrated high thermal stability with <0.4% change in mass over a wide temperature range of 30 °C-1200 °C in air environment. Moreover, lead-halide free compound, GCTO is highly thermally stable oxide double perovskite with wide band gap and absorption in the UV-Vis range are highly suitable for optical applications In addition, dielectric properties of the compound have been examined using impedance spectroscopy as a function of frequency ranging from 500 Hz to 1 MHz and temperature between 300 K and 550 K. Compounds with relaxor behaviour at high temperatures and high thermal stability are desired for several applications. Because of the cation disorders present in this compound, GCTO displays dielectric relaxor behaviour indicative of a distribution of relaxation times. Furthermore, the frequency-dependent modulus illustrated a thermally activated conduction mechanism. Cole-Cole plots of electrical modulus suggest prominent grain contribution above 350 K.
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Affiliation(s)
- Papiya Saha
- Materials Science Group, Indira Gandhi Centre for Atomic Research, A CI of Homi Bhabha National Institute, Kalpakkam 603102, Tamil Nadu, India
| | - R Nithya
- Materials Science Group, Indira Gandhi Centre for Atomic Research, A CI of Homi Bhabha National Institute, Kalpakkam 603102, Tamil Nadu, India
| | - R M Sarguna
- Materials Science Group, Indira Gandhi Centre for Atomic Research, A CI of Homi Bhabha National Institute, Kalpakkam 603102, Tamil Nadu, India
| | - Sujoy Sen
- Materials Science Group, Indira Gandhi Centre for Atomic Research, A CI of Homi Bhabha National Institute, Kalpakkam 603102, Tamil Nadu, India
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Agarwal RK, Dhanya R, Sedai A, Ankita K, Parmar L, Ramprakash S, Sandeep, Trivedi D, Shah V, Bhat N, Reddy M, R N, Faulkner L. Bone Marrow Quality Index: A Predictor of Acute Graft-versus-Host Disease in Hematopoietic Stem Cell Transplantation for Thalassemia. Transplant Cell Ther 2023; 29:711.e1-711.e6. [PMID: 37481242 DOI: 10.1016/j.jtct.2023.07.014] [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] [Subscribe] [Scholar Register] [Received: 03/25/2023] [Revised: 07/11/2023] [Accepted: 07/16/2023] [Indexed: 07/24/2023]
Abstract
Bone marrow (BM) continues to be the preferred source of stem cells in allogenic transplantation for nonmalignant disorders. Granulocyte colony-stimulating factor (G-CSF)-primed BM is associated with low rates of acute graft-versus-host disease (aGVHD) and allows reduced collection volumes while ensuring speedy engraftment. However, variability in BM harvest quality is a concern. This study evaluated the utility of a novel indicator, the Bone Marrow Quality Index (BMQI), to predict aGVHD. We analyzed 184 consecutive first matched related donor bone marrow transplants for thalassemia using G-CSF-primed bone marrow over 6 years from March 2017 to April 2023 across 2 centers in India. BMQI was defined as the ratio of the G-CSF-primed BM WBC count to the peripheral blood WBC count within 24 hours of harvest. European Society for Blood and Marrow Transplantation criteria were used to grade aGVHD. The log-rank test was used to assess the impact of BMQI on aGVHD. The chi-square test was used to compare categorical data, and the Wilcoxon rank-sum test was used to compare the numerical data. A Cox proportional hazards model was used to investigate the association of BMQI vis-à-vis other factors on aGVHD. Of the 184 patients studied, 19 had a BMQI <.9, 18 had a BMQI between .9 and 1, and the remaining 147 had a BMQI >1. The rate of aGVHD grade II-IV was 37% in patients with a BMQI <.9 , 22% in those with BMQI .9 to 1, and 12% in those with BMQI >1 (P = .018). Patients with BMQI <.9 had a 3.1-fold greater chance (95% confidence interval [CI], .9 to 10.6) and those with BMQI .9 to 1 had a 2-fold greater chance (95% CI, .5 to 6.6) of developing aGVHD grade II-IV. BMQI was the significant predictor associated with aGVHD hazard (P = .014). BMQI appears to be the most relevant and controllable predictor of aGVHD. It is a novel, informative, and very simple indicator that could influence aGVHD prophylaxis decision making. Our indicator is accurately measurable, inexpensive, precise, and timely; furthermore, it does not involve any sophisticated equipment and thus may be widely applicable. Prior knowledge of poor BM quality may help intensify prophylaxis and monitoring for aGVHD, as well as trigger a review of collection procedures.
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Affiliation(s)
- Rajat Kumar Agarwal
- Sankalp India Foundation, Bangalore, India; Jagriti InnoHealth Platforms Pvt. Ltd., Bangalore, India.
| | | | - Amit Sedai
- Sankalp India Foundation, Bangalore, India; Jagriti InnoHealth Platforms Pvt. Ltd., Bangalore, India
| | - Kumari Ankita
- Sankalp India Foundation, Bangalore, India; Jagriti InnoHealth Platforms Pvt. Ltd., Bangalore, India
| | - Lalith Parmar
- Sankalp India Foundation, Bangalore, India; Jagriti InnoHealth Platforms Pvt. Ltd., Bangalore, India
| | - Stalin Ramprakash
- Sankalp India Foundation, Bangalore, India; Sankalp-People Tree Centre for Paediatric Bone Marrow Transplantation, Bangalore, India
| | - Sandeep
- Sankalp India Foundation, Bangalore, India; Sankalp-People Tree Centre for Paediatric Bone Marrow Transplantation, Bangalore, India
| | - Deepa Trivedi
- Sankalp-CIMS Centre for Paediatric BMT, Ahmedabad, India
| | - Vaibhav Shah
- Sankalp-CIMS Centre for Paediatric BMT, Ahmedabad, India
| | - Neema Bhat
- Sankalp-BMJH Centre for Pediatric Hematology Oncology and BMT, Bangalore, India
| | - Mohan Reddy
- Sankalp-BMJH Centre for Pediatric Hematology Oncology and BMT, Bangalore, India
| | - Nithya R
- Sankalp India Foundation, Bangalore, India
| | - Lawrence Faulkner
- Sankalp India Foundation, Bangalore, India; Cure2Children Foundation, Florence, Italy
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Jayarajan D, Sagayaraj R, Silvan S, Sebastian S, Nithya R, Sujeetha S. Green synthesis, Structural and Magnetic Properties of Mg0.5Zn0.5Fe2O4 Ferrite Nanoparticles by the Coprecipitation Method: Averrhoa bilimbi fruit. Chemistry Africa 2023. [DOI: 10.1007/s42250-023-00615-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/10/2023]
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Naina P, Nithya R, Eapen P. Pediatric intranasal lobular capillary hemangioma. INDIAN J PATHOL MICR 2023; 66:202-204. [PMID: 36656243 DOI: 10.4103/ijpm.ijpm_592_21] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023] Open
Affiliation(s)
- P Naina
- Department of ENT, Christian Medical College, Vellore, Tamil Nadu, India
| | - R Nithya
- Department of ENT, Christian Medical College, Vellore, Tamil Nadu, India
| | - Preethi Eapen
- Department of Pathology, Christian Medical College, Vellore, Tamil Nadu, India
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Arthanareeswaran S, Nithya R, Gayathri M, Jose M, Monica B, Muthuselvi R. A Case Report on Sphenoidal Sinusitis with Brain Abscess in a 16 Year Old. JPRI 2022. [DOI: 10.9734/jpri/2022/v34i26a35969] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
A pyogenic infection-induced brain abscess is rare, and usually affects immunocompromised people. Brain imaging and bacterial culture from the infection site are used to diagnose a brain abscess. An effective treatment method is surgical resection combined with antibiotic treatment with bacteria-sensitive antibiotics for a sufficient period of time.
Presentation of the Case: A 16-year-old boy was confirmed to have Sphenoidal Sinusitis. The patient had been diagnosed with dengue fever three weeks ago and corona infection four months ago. And finally, he was diagnosed with Sphenoidal Sinusitis which manifested as severe headache, vomiting, and fever. He underwent bilateral Functional Endoscopy Sinus Surgery (FESS), sphenoidotomy and also temporal craniotomy and evacuation of abscess.
Conclusion: The treatment of a brain abscess requires early diagnosis, appropriate surgical treatment, and adequate duration of therapy with effective antibiotics.
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Nithya R, Ragupathy S, Sakthi D, Arun V, Kannadasan N. A study on Mn doped ZnO loaded on CSAC for the photocatalytic degradation of brilliant green dye. Chem Phys Lett 2020. [DOI: 10.1016/j.cplett.2020.137769] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Nithya R, Ayyappan S. Novel exfoliated graphitic-C3N4 hybridised ZnBi2O4 (g-C3N4/ZnBi2O4) nanorods for catalytic reduction of 4-Nitrophenol and its antibacterial activity. J Photochem Photobiol A Chem 2020. [DOI: 10.1016/j.jphotochem.2020.112591] [Citation(s) in RCA: 24] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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Yadagiri K, Nithya R, Sharma S, Satya AT. Modification of low temperature magnetic interactions in Dy 1-x Eu x MnO 3. RSC Adv 2018; 8:13537-13545. [PMID: 35542557 PMCID: PMC9079790 DOI: 10.1039/c8ra00224j] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2018] [Accepted: 03/27/2018] [Indexed: 11/21/2022] Open
Abstract
Solid solutions of rare earth ion (Eu3+) substituted DyMnO3, Dy1-x Eu x MnO3 (x = 0.0-1.0) have been synthesized by ceramic method. Powder X-ray diffraction revealed single phase nature of the compounds with orthorhombic structure. Contributions from the atomic vibrations to the observation of Raman bands have been established and assigned to symmetry stretching and anti symmetry stretching, bending and tilting modes. Raman band frequencies of tilting, asymmetric stretching and bending modes were found to decrease with increasing europium concentration showing softening. Transport studies revealed that all the compounds show semiconducting nature. While the end compounds display hopping process for electrical conduction, all the substituted compounds showed activated type of conduction, and activated energy was found to reduce with increase in x. Molar susceptibility of the substituted compounds for x = 0.1, 0.3 and 0.5 revealed an antiferromagnetic transition corresponding to Mn ions. The fitted Curie-Weiss temperatures also suggested the existence of antiferromagnetic interactions in all the materials. The magnetic field dependent magnetization at various temperatures revealed paramagnetic nature down to 8 K below which hysteresis loops are observed. The presence of strong ferromagnetic correlations between Dy and Mn spins through apical oxygen ions results in the large coercive fields. For temperatures above the antiferromagnetic temperature of manganese ions (39 K) M-H curves show almost straight lines implying the absence of ferromagnetic interactions in the compounds. Different magnetic transitions: from high temperature paramagnetic state to intermediate temperature antiferromagnetic state to low temperature ferromagnetic states are observed in the M-H data.
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Affiliation(s)
- K Yadagiri
- Materials Science Group, Indira Gandhi Centre for Atomic Research, HBNI Kalpakkam - 603102 India
| | - R Nithya
- Materials Science Group, Indira Gandhi Centre for Atomic Research, HBNI Kalpakkam - 603102 India
| | - Shilpam Sharma
- Materials Science Group, Indira Gandhi Centre for Atomic Research, HBNI Kalpakkam - 603102 India
| | - A T Satya
- Materials Science Group, Indira Gandhi Centre for Atomic Research, HBNI Kalpakkam - 603102 India
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Ramyachitra D, Nithya R. Construction of reliable heterogeneous network using protein sequence similarity for the prioritization of candidate disease genes. Gene Reports 2017. [DOI: 10.1016/j.genrep.2017.04.013] [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: 10/19/2022]
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Nithya R, Priya KM, Vigneshwari S. Stiching large images by enhancing SURF and RANSAC Algorithm. 2017 Second International Conference on Electrical, Computer and Communication Technologies (ICECCT) 2017. [DOI: 10.1109/icecct.2017.8117868] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/16/2023]
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Dorairajan G, Nithya R, Chinnakali P. Do pregnant women know about danger signs of pregnancy and childbirth? – A study of the level of knowledge and its associated factors from a tertiary care hospital in Southern India. Int J Adv Med Health Res 2017. [DOI: 10.4103/ijamr.ijamr_68_16] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022] Open
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Nithya R, Gomathi T, Sudha P, Venkatesan J, Anil S, Kim SK. Removal of Cr(VI) from aqueous solution using chitosan-g-poly(butyl acrylate)/silica gel nanocomposite. Int J Biol Macromol 2016; 87:545-54. [DOI: 10.1016/j.ijbiomac.2016.02.076] [Citation(s) in RCA: 53] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/31/2015] [Revised: 02/20/2016] [Accepted: 02/29/2016] [Indexed: 11/24/2022]
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13
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Nithya R, Sudha PN. Removal of heavy metals from tannery effluent using chitosan-g-poly(butyl acrylate)/bentonite nanocomposite as an adsorbent. ACTA ACUST UNITED AC 2016. [DOI: 10.1186/s40689-016-0018-1] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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Abstract
We synthesize a new series of compounds, Dy1−xKxMnO3 (x = 0.1, 0.2 & 0.3) and report the structural and spectroscopic properties of the new compounds in comparison to DyMnO3.
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Affiliation(s)
- K. Yadagiri
- Materials Science Group
- Indira Gandhi Centre for Atomic Research
- HBNI
- Kalpakkam – 603 102
- India
| | - R. Nithya
- Materials Science Group
- Indira Gandhi Centre for Atomic Research
- HBNI
- Kalpakkam – 603 102
- India
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Murugesan G, Nithya R, Kalainathan S, Hussain S. High temperature dielectric relaxation anomalies in Ca0.9Nd0.1Ti0.9Al0.1O3−δ single crystals. RSC Adv 2015. [DOI: 10.1039/c5ra15876a] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
We herein report dielectric studies on Ca0.9Nd0.1Ti0.9Al0.1O3−δ single crystals grown by the optical floating zone technique in the temperature range from room temperature to 660 K.
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Affiliation(s)
- G. Murugesan
- Centre for Crystal Growth
- School of Advanced Sciences
- VIT University
- Vellore 632 014
- India
| | - R. Nithya
- Materials Science Group
- Indira Gandhi Centre for Atomic Research
- Kalpakkam 603 102
- India
| | - S. Kalainathan
- Centre for Crystal Growth
- School of Advanced Sciences
- VIT University
- Vellore 632 014
- India
| | - Shamima Hussain
- UGC-DAE Consortium for Scientific Research
- Kokilamedu 603104
- India
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Murugesan G, Nithya R, Kalainathan S, Ravindran TR. Optical and spectroscopic studies of Ca0.9Nd0.1Ti0.9Al0.1O3 single crystals grown by an optical floating zone technique. CrystEngComm 2015. [DOI: 10.1039/c4ce02327g] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Single crystals of multifunctional Ca0.9Nd0.1Ti0.9Al0.1O3 have been grown in air and also in argon atmosphere using an optical floating zone technique.
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Affiliation(s)
- G. Murugesan
- Centre for Crystal Growth
- School of Advanced Sciences
- VIT University
- Vellore 632 014, India
| | - R. Nithya
- Materials Science Group
- Indira Gandhi Centre for Atomic Research
- Kalpakkam 603 102, India
| | - S. Kalainathan
- Centre for Crystal Growth
- School of Advanced Sciences
- VIT University
- Vellore 632 014, India
| | - T. R. Ravindran
- Materials Science Group
- Indira Gandhi Centre for Atomic Research
- Kalpakkam 603 102, India
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Daniel DJ, Madhusoodanan U, Nithya R, Ramasamy P. Irradiation effect on luminescence properties of fluoroperovskite single crystal (LiBaF3:Eu2+). Radiat Phys Chem Oxf Engl 1993 2014. [DOI: 10.1016/j.radphyschem.2013.09.010] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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Abstract
Bone, a typical inorganic-organic biocomposite, is made of approximately 70 wt% inorganic components, mainly hydroxyapatite (HAp,Ca(10)(PO(4))(6)(OH)(2)), and 30 wt% of organic matrix, mainly collagen I. Human organ failure caused by defects, injuries, or other types of damage is one of the most devastating and costly problems in human health care. Recently, tissue engineering has emerged as a promising approach for bone repair and reconstruction. The ultimate goal of bone tissue engineering is the fabrication of a construct that matches the physical and biological properties of the natural bone tissue. Biopolymers have some distinct advantages such as their biodegradation rates and mechanical properties can be tailored to a certain extent for specific applications. Alginate, a natural polysaccharide, is readily processable for applicable three-dimensional scaffolding materials such as hydrogels, microspheres, microcapsules, sponges, foams, and fibers. Alginate can be easily modified via chemical and physical reactions to obtain derivatives having various structures, properties, functions, and applications. The purpose of this chapter is to review recent research on alginate in bone tissue engineering.
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Affiliation(s)
- Jayachandran Venkatesan
- Department of Marine-bio Convergence Science and Marine Bioprocess Research Center, Pukyong National University, Busan, South Korea.
| | - R Nithya
- Department of Chemistry, D.K.M. College for Women, Thiruvalluvar University, Vellore, Tamil Nadu, India
| | - Prasad N Sudha
- Department of Chemistry, D.K.M. College for Women, Thiruvalluvar University, Vellore, Tamil Nadu, India
| | - Se-Kwon Kim
- Department of Marine-bio Convergence Science and Marine Bioprocess Research Center, Pukyong National University, Busan, South Korea
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Nithya R, Senthilkumar K. Theoretical studies on the quinoidal thiophene based dyes for dye sensitized solar cell and NLO applications. Phys Chem Chem Phys 2014; 16:21496-505. [DOI: 10.1039/c4cp02694b] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
The designed quinoidal thiophene molecules are good candidates for DSSC applications.
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Affiliation(s)
- R. Nithya
- Department of Physics
- Bharathiar University
- Coimbatore, 641 046 India
| | - K. Senthilkumar
- Department of Physics
- Bharathiar University
- Coimbatore, 641 046 India
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Priya S, Nithya R, Berchmans S. S-nitrosothiol tethered polymer hexagons: synthesis, characterisation and antibacterial effect. J Mater Sci Mater Med 2014; 25:1-10. [PMID: 23996380 DOI: 10.1007/s10856-013-5032-0] [Citation(s) in RCA: 5] [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] [Subscribe] [Scholar Register] [Received: 04/18/2013] [Accepted: 08/12/2013] [Indexed: 06/02/2023]
Abstract
In this work, we portray a new controlled nitric oxide (NO) delivery platform by grafting S-nitrosothiol derived from cysteine into the polymeric backbone of poly(vinyl methyl ether-co-maleic anhydride). Nitrosothiols (RSNO's) are linked to the polymeric backbone through solvent displacement method. By adjusting solvent polarity, materials of different shapes and sizes varying between μm and nm are prepared. More often our method of preparation resulted in hexagonally shaped polymeric materials. The structure and RSNO conjugation analysis was investigated using scanning electron microscopy (SEM), FT-IR, UV-Vis spectroscopy and thermogravimetric analysis (TGA). Bactericidal efficacy of nitric oxide releasing polymer hexagons, a novel antibacterial agent is demonstrated against Escherichia coli, Staphylococcus aureus and Pseudomonas aeruginosa. Confocal microscopic studies revealed the enhanced bactericidal effect of polymer hexagons via membrane destruction. Results suggest that this biocompatible NO releasing RSNO conjugated polymer hexagons could be potentially useful for antimicrobial applications.
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Affiliation(s)
- S Priya
- Electrodics and Electrocatalysis Division, Central Electrochemical Research Institute, Karaikudi, 630006, Tamil Nadu, India,
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Abstract
Biomaterials have been used increasingly in various fields, such as drug delivery, imaging, and tissue engineering. The main reason justifying the widespread use of biomaterials relies on its valuable and low-cost source of new drugs. Current research goals are focused on identifying more potent and specific compounds with antitumor, immunomodulatory, antihyperlipidemic, anticoagulant, and antiviral activities. The increasing knowledge of structural analysis and chemical modifications enables the use of these marine carbohydrates in a newer way for the human welfare. This chapter focuses on the recent developments related to industrial and biomedical applications using chitin, chitosan, alginate, agar, and carrageenan derivatives and reports the main advances published over the last 10-15 years.
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Affiliation(s)
- Prasad N Sudha
- Department of Chemistry, D.K.M. College for Women, Thiruvalluvar University, Vellore, Tamil Nadu, India.
| | - S Aisverya
- Department of Chemistry, D.K.M. College for Women, Thiruvalluvar University, Vellore, Tamil Nadu, India
| | - R Nithya
- Department of Chemistry, D.K.M. College for Women, Thiruvalluvar University, Vellore, Tamil Nadu, India
| | - K Vijayalakshmi
- Department of Chemistry, D.K.M. College for Women, Thiruvalluvar University, Vellore, Tamil Nadu, India
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Nithya R, Sowmiya M, Kolandaivel P, Senthilkumar K. Structural, optical, and charge transport properties of cyclopentadithiophene derivatives: a theoretical study. Struct Chem 2013. [DOI: 10.1007/s11224-013-0325-y] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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Salil G, Nithya R, Nevin KG, Rajamohan T. Dietary coconut kernel protein beneficially modulates NFκB and RAGE expression in streptozotocin induced diabetes in rats. J Food Sci Technol 2012; 51:2141-7. [PMID: 25190875 DOI: 10.1007/s13197-012-0729-5] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Revised: 04/09/2012] [Accepted: 04/30/2012] [Indexed: 01/21/2023]
Abstract
Previous studies showed that arginine rich coconut kernel protein (CKP) maintains glucose homeostasis in experimental diabetic rats. But the mechanism of this effect was not clear. This study investigated the effect of CKP on the expression of liver receptor for advance glycated end products (RAGE), inducible nitric oxide synthase (iNOS) and NFkB. Diabetes was induced by injecting a single dose of streptozotocin (75 mg/kg body weight) intraperitoneally. After inducing diabetes, CKP was administered to rats orally for 45 days. After the experimental period, serum glucose, insulin, liver glycogen, glucose metabolizing enzyme activities and the expression of liver RAGE, iNOS and NFkB was evaluated. The results showed that CKP beneficially modulated the levels of glucose and insulin as well as the metabolizing enzyme activities. Expression of RAGE and NFkB was found to be over expressed in diabetic rats but was found to be down regulated in CKP fed diabetic rats. iNOS expression was down regulated in diabetic rats, which was expressed normally in CKP fed diabetic rats. These results clearly demonstrated that anti diabetic activity of CKP is mediated through NFkB pathway.
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Affiliation(s)
- G Salil
- Department of Biochemistry, University of Kerala, Kariavattom Campus, Thiruvananthapuram, Kerala 695 581 India ; Department of Biochemistry, Mar Baselios Dental College, Thankalam, Kothamangalam, Eranakulam, Kerala 686 691 India
| | - R Nithya
- Department of Biochemistry, University of Kerala, Kariavattom Campus, Thiruvananthapuram, Kerala 695 581 India
| | - K G Nevin
- Department of Biochemistry, Division of Biosciences, Sree Narayana Guru Institute of Science and Technology, North Paravoor, Eranakulam, Kerala 683 520 India
| | - T Rajamohan
- Department of Biochemistry, University of Kerala, Kariavattom Campus, Thiruvananthapuram, Kerala 695 581 India
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Nithya R, Kolandaivel P, Senthilkumar K. Understanding the absorption and emission spectra of borondipyrromethene dye and its substituted analogues. Mol Phys 2012. [DOI: 10.1080/00268976.2012.655792] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/14/2022]
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Nithya R, Santhi B. Classification of Normal and Abnormal Patterns in Digital Mammograms for Diagnosis of Breast Cancer. ACTA ACUST UNITED AC 2011. [DOI: 10.5120/3391-4707] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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Nithya R, Santhanamoorthi N, Kolandaivel P, Senthilkumar K. Structural and Spectral Properties of 4-Bromo-1-naphthyl Chalcones: A Quantum Chemical Study. J Phys Chem A 2011; 115:6594-602. [DOI: 10.1021/jp1098393] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- R. Nithya
- Department of Physics, Bharathiar University, Coimbatore, India 641 046
| | | | - P. Kolandaivel
- Department of Physics, Bharathiar University, Coimbatore, India 641 046
| | - K. Senthilkumar
- Department of Physics, Bharathiar University, Coimbatore, India 641 046
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Nithya R, Barathan S, Gopalakrishan M, Sivakumar G, Gobinath B. The Hydration of Heavy Metal Salts Admixtured High Alumina Cement – A X-Ray Diffraction Study. ACTA ACUST UNITED AC 2009. [DOI: 10.5539/apr.v1n2p19] [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: 11/12/2022]
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Kamruddin M, Ajikumar P, Nithya R, Mangamma G, Tyagi A, Raj B. Effect of water of crystallization on synthesis of nanocrystalline ceria by non-hydrolytic method. POWDER TECHNOL 2006. [DOI: 10.1016/j.powtec.2005.10.003] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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