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  1. Article ; Online: Polymer Backbone Chemistry Shapes the Alkaline Stability of Metallopolymer Anion-Exchange Membranes.

    Aggarwal, Kanika / Li, Songlin / Nijem, Sally / Dekel, Dario R / Diesendruck, Charles E

    Chemistry (Weinheim an der Bergstrasse, Germany)

    2024  Volume 30, Issue 20, Page(s) e202400029

    Abstract: Anion-exchange membrane fuel cells and water electrolyzers have garnered significant attention in past years due to their potential role in sustainable and affordable energy conversion and storage. However, the chemical stability of the polymeric anion- ... ...

    Abstract Anion-exchange membrane fuel cells and water electrolyzers have garnered significant attention in past years due to their potential role in sustainable and affordable energy conversion and storage. However, the chemical stability of the polymeric anion-exchange membranes (AEMs), the key component in these devices, currently limits their lifespan. Recently, metallopolymers have been proposed as chemically stable alternatives to organic cations, using metal centers as ion transporters. In metallopolymer AEMs, various properties such as alkaline stability, water uptake, flexibility, and performance, are determined by both the metal complex and polymer backbone. Herein we present a systematic study investigating the influence of the polymer backbone chemistry on some of these properties, focusing on the alkaline stability of low-oxophilicity gold metallopolymers. Despite the use of a common N-heterocyclic carbene ligand, upon gold metalation using the same reaction conditions, different polymer backbones end up forming different gold complexes. These findings suggest that polymer chemistry affects the metalation reaction in addition to the other properties relevant to AEM performance.
    Language English
    Publishing date 2024-02-19
    Publishing country Germany
    Document type Journal Article
    ZDB-ID 1478547-X
    ISSN 1521-3765 ; 0947-6539
    ISSN (online) 1521-3765
    ISSN 0947-6539
    DOI 10.1002/chem.202400029
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  2. Article: Mandibular lateral incisor with Vertucci Type IV root canal morphological system: A rare case report.

    Aggarwal, Kanika

    Journal of natural science, biology, and medicine

    2015  Volume 7, Issue 1, Page(s) 101–104

    Abstract: Abnormalities in the root canal anatomy are commonly occurring phenomenon. A thorough knowledge of root canal anatomy and its variation is necessary for successful completion of endodontic treatment. Mandibular anteriors are known for having extra canals. ...

    Abstract Abnormalities in the root canal anatomy are commonly occurring phenomenon. A thorough knowledge of root canal anatomy and its variation is necessary for successful completion of endodontic treatment. Mandibular anteriors are known for having extra canals. The role of genetics and racial variations may result in difference of incidence of root number and canal number. This paper attempts at explaining a rare case of successful endodontic management of two-rooted lateral incisor with awareness of data pertaining to number of canals, knowledge of canal morphology, correct radiographic interpretation, and tactile examination of canal wall which are important in detecting the presence of multiple canals.
    Language English
    Publishing date 2015-09-04
    Publishing country India
    Document type Case Reports
    ZDB-ID 2638867-4
    ISSN 2229-7707 ; 0976-9668
    ISSN (online) 2229-7707
    ISSN 0976-9668
    DOI 10.4103/0976-9668.175103
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  3. Article ; Online: Bacillary layer detachment in tubercular choroidal granuloma: A new optical coherence tomography finding.

    Markan, Ashish / Aggarwal, Kanika / Gupta, Vishali / Agarwal, Aniruddha

    Indian journal of ophthalmology

    2020  Volume 68, Issue 9, Page(s) 1944–1946

    MeSH term(s) Choroid ; Choroid Diseases/diagnosis ; Fluorescein Angiography ; Granuloma/complications ; Granuloma/diagnosis ; Humans ; Tomography, Optical Coherence
    Language English
    Publishing date 2020-08-04
    Publishing country India
    Document type Journal Article
    ZDB-ID 187392-1
    ISSN 1998-3689 ; 0301-4738
    ISSN (online) 1998-3689
    ISSN 0301-4738
    DOI 10.4103/ijo.IJO_1434_20
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  4. Article ; Online: Characterization and preparation of Fe

    Singh, Sandeep / Singh, Gurpreet / Bala, Niraj / Aggarwal, Kanika

    International journal of biological macromolecules

    2020  Volume 151, Page(s) 519–528

    Abstract: In this study, bioglass (BG)‑iron oxide ( ... ...

    Abstract In this study, bioglass (BG)‑iron oxide (Fe
    MeSH term(s) Alloys/chemistry ; Anti-Bacterial Agents/chemistry ; Anti-Bacterial Agents/pharmacology ; Ceramics/chemistry ; Chitosan/chemistry ; Coated Materials, Biocompatible ; Magnesium/chemistry ; Magnetic Iron Oxide Nanoparticles/chemistry ; Magnetic Iron Oxide Nanoparticles/ultrastructure ; Microbial Sensitivity Tests ; Nanocomposites/chemistry ; Nanocomposites/ultrastructure ; Spectrum Analysis
    Chemical Substances Alloys ; Anti-Bacterial Agents ; Bioglass ; Coated Materials, Biocompatible ; Chitosan (9012-76-4) ; Magnesium (I38ZP9992A)
    Language English
    Publishing date 2020-02-20
    Publishing country Netherlands
    Document type Journal Article
    ZDB-ID 282732-3
    ISSN 1879-0003 ; 0141-8130
    ISSN (online) 1879-0003
    ISSN 0141-8130
    DOI 10.1016/j.ijbiomac.2020.02.208
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  5. Article: Characterization and preparation of Fe3O4 nanoparticles loaded bioglass-chitosan nanocomposite coating on Mg alloy and in vitro bioactivity assessment

    Singh, Sandeep / Singh, Gurpreet / Bala, Niraj / Aggarwal, Kanika

    International journal of biological macromolecules. 2020 May 15, v. 151

    2020  

    Abstract: In this study, bioglass (BG)‐iron oxide (Fe3O4) nanocomposite coating was developed to produce bioactive and antibacterial coatings. The nanocomposite coating was embedded in chitosan (CS) matrix and coating was fabricated by electrophoretic deposition ( ... ...

    Abstract In this study, bioglass (BG)‐iron oxide (Fe3O4) nanocomposite coating was developed to produce bioactive and antibacterial coatings. The nanocomposite coating was embedded in chitosan (CS) matrix and coating was fabricated by electrophoretic deposition (EPD) method. The coating was characterized by using SEM/EDX and XRD respectively. The experiment was performed with three varying concentrations (1, 3, 5 (wt%)) of Fe3O4 nanoparticles prepared by the co- precipitation method in the bioactive glass coating. The antibacterial activity was examined in Escherichia coli and Staphylococcus aureus bacteria which determine that the growth of microorganisms was inhibited with the progressive increment of Fe3O4 nanoparticles. The bioactivity assessment was done in PBS for 7 days and it was detected that the composite coatings improve the bone-bonding ability which was again confirmed by SEM-EDX. The corrosion behavior was evaluated in Ringer's solution by electrochemical test. The corrosion analysis revealed that the BG-1% Fe3O4 nanocomposite coating has superior corrosion resistance as compared to the other coatings. The findings of the research have shown that the BG-Fe3O4-CS nanocomposite coating can be widely used as a suitable material for orthopedic applications.
    Keywords Escherichia coli ; Staphylococcus aureus ; X-ray diffraction ; alloys ; antibacterial properties ; bacteria ; chitosan ; coatings ; corrosion ; electrochemistry ; electrophoresis ; energy-dispersive X-ray analysis ; glass ; iron oxides ; magnesium ; microbial growth ; nanocomposites ; nanoparticles ; orthopedics ; scanning electron microscopy
    Language English
    Dates of publication 2020-0515
    Size p. 519-528.
    Publishing place Elsevier B.V.
    Document type Article
    ZDB-ID 282732-3
    ISSN 1879-0003 ; 0141-8130
    ISSN (online) 1879-0003
    ISSN 0141-8130
    DOI 10.1016/j.ijbiomac.2020.02.208
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  6. Article ; Online: Alkaline Stability of Low Oxophilicity Metallopolymer Anion-Exchange Membranes.

    Aggarwal, Kanika / Bsoul, Saja / Douglin, John C / Li, Songlin / Dekel, Dario R / Diesendruck, Charles E

    Chemistry (Weinheim an der Bergstrasse, Germany)

    2022  Volume 28, Issue 7, Page(s) e202103744

    Abstract: Anion-exchange membrane fuel cells (AEMFCs) are promising energy conversion devices due to their high efficiency. Nonetheless, AEMFC operation time is currently limited by the low chemical stability of their polymeric anion-exchange membranes. In recent ... ...

    Abstract Anion-exchange membrane fuel cells (AEMFCs) are promising energy conversion devices due to their high efficiency. Nonetheless, AEMFC operation time is currently limited by the low chemical stability of their polymeric anion-exchange membranes. In recent years, metallopolymers, where the metal centers assume the ion transport function, have been proposed as a chemically stable alternative. Here we present a systematic study using a polymer backbone with side-chain N-heterocyclic carbene (NHC) ligands complexed to various metals with low oxophilicity, such as copper, zinc, nickel, and gold. The golden metallopolymer, using the metal with the lowest oxophilicity, demonstrates exceptional alkaline stability, far superior to state-of-the-art quaternary ammonium cations, as well as good in situ AEMFC results. These results demonstrate that judiciously designed metallopolymers may be superior to purely organic membranes and provides a scientific base for further developments in the field.
    Language English
    Publishing date 2022-01-05
    Publishing country Germany
    Document type Journal Article
    ZDB-ID 1478547-X
    ISSN 1521-3765 ; 0947-6539
    ISSN (online) 1521-3765
    ISSN 0947-6539
    DOI 10.1002/chem.202103744
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  7. Article ; Online: The Role of Proportional Reflux During Pars Plana Vitrectomy for Tractional Retinal Detachments.

    Jain, Sahil / Agarwal, Aniruddha / Aggarwal, Kanika / Gupta, Vishali

    Ophthalmic surgery, lasers & imaging retina

    2019  Volume 50, Issue 2, Page(s) 113–115

    Abstract: Background and objective: To discuss the role of proportional reflux hydrodissection (PRH) during pars plana vitrectomy (PPV) in eyes with diabetic tractional retinal detachment (TRD).: Patients and methods: In this retrospective study, records of ... ...

    Abstract Background and objective: To discuss the role of proportional reflux hydrodissection (PRH) during pars plana vitrectomy (PPV) in eyes with diabetic tractional retinal detachment (TRD).
    Patients and methods: In this retrospective study, records of patients with diabetic TRD involving the fovea undergoing PPV with the help of PRH between January 2015 to March 2017 were noted. PRH relies on the Constellation system's proportional reflux feature. The mean age, gender, and pre- and postoperative best-corrected visual acuity (BCVA) were noted. Minimum follow-up period of 3 months was ascertained.
    Results: Thirty-three patients were included. Preoperative and postoperative BCVA were 1.80 logMAR units and 1.20 logMAR units, respectively. Fifteen patients also received preoperative intravitreal ranibizumab. Twelve percent needed the help of a second instrument. Thirty-three percent developed intraoperative iatrogenic breaks, and 39.39% needed oil/gas tamponade. All patients had successful reattachments at 3-month follow-up.
    Conclusions: PRH is simple, cost-effective, surgeon-friendly, and highly controlled technique helpful in managing diabetic TRD. [Ophthalmic Surg Lasers Imaging Retina. 2019;50:113-115.].
    MeSH term(s) Angiogenesis Inhibitors/administration & dosage ; Diabetic Retinopathy/complications ; Diabetic Retinopathy/surgery ; Dissection/methods ; Female ; Humans ; Male ; Ranibizumab/administration & dosage ; Retinal Detachment/etiology ; Retinal Detachment/surgery ; Retrospective Studies ; Visual Acuity ; Vitrectomy/methods
    Chemical Substances Angiogenesis Inhibitors ; Ranibizumab (ZL1R02VT79)
    Language English
    Publishing date 2019-02-15
    Publishing country United States
    Document type Journal Article
    ZDB-ID 2701167-7
    ISSN 2325-8179 ; 2325-8160
    ISSN (online) 2325-8179
    ISSN 2325-8160
    DOI 10.3928/23258160-20190129-08
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    Zs.A 756: Show issues Location:
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  8. Article ; Online: Swept-source optical coherence tomography angiography of choroidal neovascularization in vertically oriented oval dome-shaped maculopathy.

    Agarwal, Aniruddha / Aggarwal, Kanika / Gupta, Vishali

    Indian journal of ophthalmology

    2019  Volume 67, Issue 8, Page(s) 1368–1371

    Abstract: A 48-year-old female presented with complaints of recent onset diminution of vision of the left eye (OS) for the past 2 months. She was highly myopic and was using glasses for the past 30 years. Ocular examination revealed presence of a myopic fundus ... ...

    Abstract A 48-year-old female presented with complaints of recent onset diminution of vision of the left eye (OS) for the past 2 months. She was highly myopic and was using glasses for the past 30 years. Ocular examination revealed presence of a myopic fundus with high axial lengths in both the eyes. Fundus examination of the OS revealed a myopic tessellated fundus with prominent choroidal vessels and a blunted foveal reflex. There was a small pale whitish lesion just superior to the foveal center. Optical coherence tomography (OCT) scans (both horizontal and vertical) confirmed presence of dome-shaped maculopathy. There was subretinal fluid in the OS. A vertical OCT scan also revealed a subretinal hyperreflective material, which was confirmed to be due to a small mixed type 1 and type 2 choroidal neovascularization (CNV) on swept-source (SS) OCT angiography in the OS. The patient was given intravitreal injection of ranibizumab (0.5 mg/0.05 mL) in the OS. At 1-month follow-up, the subretinal fluid completely resolved. The CNV lesion regressed significantly on SS-OCT angiography. The best-corrected visual acuity improved from 20/80 to 20/20 in the OS, which was maintained at 3 months of follow-up.
    MeSH term(s) Angiogenesis Inhibitors/therapeutic use ; Choroidal Neovascularization/diagnostic imaging ; Choroidal Neovascularization/drug therapy ; Coloring Agents/administration & dosage ; Female ; Fluorescein Angiography/methods ; Humans ; Indocyanine Green/administration & dosage ; Intravitreal Injections ; Middle Aged ; Ranibizumab/therapeutic use ; Retinal Diseases/diagnostic imaging ; Retinal Diseases/drug therapy ; Subretinal Fluid ; Tomography, Optical Coherence/methods ; Vascular Endothelial Growth Factor A/antagonists & inhibitors ; Vision Disorders/diagnosis ; Visual Acuity
    Chemical Substances Angiogenesis Inhibitors ; Coloring Agents ; VEGFA protein, human ; Vascular Endothelial Growth Factor A ; Indocyanine Green (IX6J1063HV) ; Ranibizumab (ZL1R02VT79)
    Language English
    Publishing date 2019-07-22
    Publishing country India
    Document type Case Reports ; Journal Article
    ZDB-ID 187392-1
    ISSN 1998-3689 ; 0301-4738
    ISSN (online) 1998-3689
    ISSN 0301-4738
    DOI 10.4103/ijo.IJO_2077_18
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  9. Article ; Online: Subretinal Hemorrhage Complicating Retinal Angiomatous Proliferation in Tubercular Retinal Vasculitis.

    Agarwal, Aniruddha / Aggarwal, Kanika / Handa, Sabia / Markan, Ashish / Gupta, Vishali

    Ocular immunology and inflammation

    2020  Volume 30, Issue 2, Page(s) 397–401

    Abstract: Purpose: To report a patient with submacular hemorrhage due to retinal angiomatous proliferation (RAP) in tubercular retinal vasculitis (TRV).: Methods: Case report.: Results: We report a 33-year-old Asian Indian patient of TRV presenting with ... ...

    Abstract Purpose: To report a patient with submacular hemorrhage due to retinal angiomatous proliferation (RAP) in tubercular retinal vasculitis (TRV).
    Methods: Case report.
    Results: We report a 33-year-old Asian Indian patient of TRV presenting with capillary non-perfusion areas, submacular hemorrhage and venous loops. The patient presented with sudden onset decrease in vision in the right eye. Multimodal imaging revealed presence of retinal vascular anastomosis and stage 2 RAP. Systemic examination was within normal limits. Laboratory evaluation revealed positive Mantoux and interferon gamma release assay. He underwent right eye intravitreal injection of recombinant tissue plasminogen activator (12.5µg/0.1ml) with 100% sulphur hexafluoride (SF6) tamponade. The patient had successful displacement of the submacular hemorrhage with some improvement in visual acuity.
    Conclusion: This case highlights that rare vascular alterations such as RAP can develop in subjects with ocular tuberculosis.
    MeSH term(s) Adult ; Cell Proliferation ; Fibrinolytic Agents/therapeutic use ; Fluorescein Angiography ; Humans ; Macular Degeneration ; Male ; Retinal Hemorrhage/diagnosis ; Retinal Hemorrhage/drug therapy ; Retinal Hemorrhage/etiology ; Retinal Vasculitis/complications ; Retinal Vasculitis/diagnosis ; Retinal Vasculitis/drug therapy ; Retrospective Studies ; Sulfur Hexafluoride ; Tissue Plasminogen Activator ; Vitrectomy/adverse effects
    Chemical Substances Fibrinolytic Agents ; Tissue Plasminogen Activator (EC 3.4.21.68) ; Sulfur Hexafluoride (WS7LR3I1D6)
    Language English
    Publishing date 2020-09-25
    Publishing country England
    Document type Case Reports ; Journal Article
    ZDB-ID 1193873-0
    ISSN 1744-5078 ; 0927-3948
    ISSN (online) 1744-5078
    ISSN 0927-3948
    DOI 10.1080/09273948.2020.1803363
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  10. Article ; Online: Angiotensin receptor blocker-induced bilateral ciliochoroidal effusion.

    Aggarwal, Kanika / Agarwal, Aniruddha / Gupta, Ashok / Saini, Reeti / Gupta, Amod

    Indian journal of ophthalmology

    2020  Volume 68, Issue 6, Page(s) 1168–1169

    MeSH term(s) Angiotensin Receptor Antagonists/adverse effects ; Choroidal Effusions ; Ciliary Body ; Humans
    Chemical Substances Angiotensin Receptor Antagonists
    Language English
    Publishing date 2020-05-26
    Publishing country India
    Document type Journal Article
    ZDB-ID 187392-1
    ISSN 1998-3689 ; 0301-4738
    ISSN (online) 1998-3689
    ISSN 0301-4738
    DOI 10.4103/ijo.IJO_1931_19
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