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  1. Article ; Online: Natural Polymer-Based Thin Film Strategies for Skin Regeneration in Lieu of Regenerative Dentistry.

    Singh, Parth Narayan / Byram, Prasanna Kumar / Das, Lopamudra / Chakravorty, Nishant

    Tissue engineering. Part C, Methods

    2024  Volume 29, Issue 6, Page(s) 242–256

    Abstract: Wound healing (WH) is a complex and dynamic process that comprises of a series of molecular and cellular events that occur after tissue injury. The injuries of the maxillofacial and oral region caused by trauma or surgery result in undesirable WH such as ...

    Abstract Wound healing (WH) is a complex and dynamic process that comprises of a series of molecular and cellular events that occur after tissue injury. The injuries of the maxillofacial and oral region caused by trauma or surgery result in undesirable WH such as delayed wound closure and formation of scar tissue. Skin tissue engineering (TE)/regeneration is an emerging approach toward faster, superior, and more effective resolution of clinically significant wounds effectively. A multitude of TE principles approaches are being put to action for the fabrication of hydrogels, electrospun sheets, 3D scaffolds, and thin films that can be used as wound dressings materials, sutures, or skin substitutes. Thin films are advantageous over other materials owing to their flexibility, ability to provide a barrier against external contamination, easy gaseous exchange, and easy monitoring of wounds. This review focuses on wound-dressing films and their significance and discusses various fabrication techniques. In addition, we explore various natural biopolymers that can be used for fabrication of skin TE materials. Impact Statement In this review article, critical evaluations of natural polymers used in skin regeneration were discussed. Further, the fabrication technology of the 2D and 3D material in wound healing were discussed.
    MeSH term(s) Regeneration ; Polymers ; Skin ; Wound Healing ; Dentistry
    Chemical Substances Polymers
    Language English
    Publishing date 2024-02-20
    Publishing country United States
    Document type Review ; Journal Article
    ZDB-ID 2420585-0
    ISSN 1937-3392 ; 1937-3384
    ISSN (online) 1937-3392
    ISSN 1937-3384
    DOI 10.1089/ten.TEC.2023.0070
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  2. Article ; Online: Synthesis and application of alginate-nanocellulose composite beads for defluoridation process in a batch and fluidized bed reactor

    Das, Lopamudra / Das, Papita / Bhowal, Avijit

    Journal of Environmental Management. 2023 Oct., v. 344 p.118569-

    2023  

    Abstract: Electronegative Fluorine has great reactivity and it exists as organic or inorganic fluoride compounds. Biosorption feasibility of fluoride onto alginate-cellulose composites was investigated in this study. Extracted cellulose has been utilized to ... ...

    Abstract Electronegative Fluorine has great reactivity and it exists as organic or inorganic fluoride compounds. Biosorption feasibility of fluoride onto alginate-cellulose composites was investigated in this study. Extracted cellulose has been utilized to synthesize calcium alginate impregnated composite beads for fluoride remediation process in batch and fluidized-bed reactors. Physiochemical characteristics were analyzed by FTIR, SEM, TGA and BET. From the BET properties analysis, the surface area of prepared composite beads was 87.13 m²/g. The point zero charge (PZC) value of composite beads was attained at pH 7.32. The relationship between biosorption efficiency and independent variables have been observed to evaluate the effects on the fluoride biosorption efficiency of composites and its components. The hypothetical development of the removal technique has been explained using various nonlinear model-fitting methods to evaluate Isotherm study, bio-sorption Kinetics, Thermodynamic parameters and Mass transfer study. Maximum monolayer adsorption capacity (qₘ) obtained by following Langmuir model for fluoride removal was found to be 23.809 mg/g at 30 °C using adsorbent dosage of 2 g/L for an initial fluoride concentration of 6 mg/L. The optimized condition for fluoride adsorption experiment was observed by evaluating response surface methodology (RSM) was pH-5.67, dose 1.89 g/L and time 85.71 min and removal was found as 82.79%. Experimental data of fluidized-bed study were evaluated by designing mathematical modeling. Fluidization velocities was adjusted in between Uₘf and 2Uₘf for optimizing external mass transfer and adsorbent loss. Regeneration study of fluoride loaded biosorbent and cost analysis of composite production have been estimated.
    Keywords adsorbents ; adsorption ; biosorbents ; biosorption ; calcium alginate ; cellulose ; cost analysis ; defluoridation ; fluidized beds ; fluorides ; fluorine ; mass transfer ; pH ; remediation ; response surface methodology ; sorption isotherms ; surface area ; thermodynamics ; Alginate-nanocellulose beads ; Defluoridation process ; Batch study ; Fluidized-bed study ; Regeneration study
    Language English
    Dates of publication 2023-10
    Publishing place Elsevier Ltd
    Document type Article ; Online
    ZDB-ID 184882-3
    ISSN 1095-8630 ; 0301-4797
    ISSN (online) 1095-8630
    ISSN 0301-4797
    DOI 10.1016/j.jenvman.2023.118569
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  3. Article ; Online: Synthesis and application of alginate-nanocellulose composite beads for defluoridation process in a batch and fluidized bed reactor.

    Das, Lopamudra / Das, Papita / Bhowal, Avijit

    Journal of environmental management

    2023  Volume 344, Page(s) 118569

    Abstract: Electronegative Fluorine has great reactivity and it exists as organic or inorganic fluoride compounds. Biosorption feasibility of fluoride onto alginate-cellulose composites was investigated in this study. Extracted cellulose has been utilized to ... ...

    Abstract Electronegative Fluorine has great reactivity and it exists as organic or inorganic fluoride compounds. Biosorption feasibility of fluoride onto alginate-cellulose composites was investigated in this study. Extracted cellulose has been utilized to synthesize calcium alginate impregnated composite beads for fluoride remediation process in batch and fluidized-bed reactors. Physiochemical characteristics were analyzed by FTIR, SEM, TGA and BET. From the BET properties analysis, the surface area of prepared composite beads was 87.13 m
    MeSH term(s) Fluorides/chemistry ; Alginates ; Hydrogen-Ion Concentration ; Thermodynamics ; Adsorption ; Kinetics ; Cellulose ; Water Pollutants, Chemical/chemistry
    Chemical Substances Fluorides (Q80VPU408O) ; Alginates ; Cellulose (9004-34-6) ; Water Pollutants, Chemical
    Language English
    Publishing date 2023-07-13
    Publishing country England
    Document type Journal Article
    ZDB-ID 184882-3
    ISSN 1095-8630 ; 0301-4797
    ISSN (online) 1095-8630
    ISSN 0301-4797
    DOI 10.1016/j.jenvman.2023.118569
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  4. Article: Enhanced biosorption of fluoride by extracted nanocellulose/polyvinyl alcohol composite in batch and fixed-bed system: ANN analysis and numerical modeling

    Das, Lopamudra / Das, Papita / Bhowal, Avijit / Bhattacharjee, Chiranjib

    Environmental science and pollution research. 2021 Sept., v. 28, no. 34

    2021  

    Abstract: The present investigation attempted to examine the defluoridation feasibility onto the extracted nanocellulose/PVA polymer composites. Nanocellulose were derived from sugarcane bagasse and blended with PVA (polyvinyl alcohol) polymer matrix. The ... ...

    Abstract The present investigation attempted to examine the defluoridation feasibility onto the extracted nanocellulose/PVA polymer composites. Nanocellulose were derived from sugarcane bagasse and blended with PVA (polyvinyl alcohol) polymer matrix. The defluoridation potential of nanocellulose/PVA was observed to be significantly dependent on the various operational factors including pH, time interval, etc. the Temkin isotherm (R² = 0.989) as well as the Langmuir isotherm equation (R² = 0.982) could well fit with the investigational data. Following the Langmuir isotherm, the maximum monolayer adsorption capacity for fluoride elimination at 25°C was obtained as 11.363 mg g⁻¹. The nature of rate-limiting steps involved in defluoridation process might be effectively predicted by pseudo-second-order kinetics. Values of thermodynamic state properties achieved as of the thermodynamic analysis showed that the defluoridation process was spontaneous, exothermic, and feasible. The diffusion and mass transfer study were estimated by following the Boyd’s model. Average effective diffusion coefficient (Dₑ) at various initial fluoride concentrations (4–10 mg L⁻¹) was obtained as 15.3343×10⁻⁷ m²s⁻¹ and the estimated magnitude of the mass-transfer coefficient (Kf) was 0.0346×10⁻⁹ m s⁻¹ (temperature = 298 K, C₀= 6 mgL⁻¹). An ANN (artificial neural network) model applied to optimize and simulate the defluoridation procedure. Furthermore, continuous flow column reactor was conducted to investigate the practical applicability of composites in the defluoridation process. The Yoon-Nelson and the Thomas model exhibited excellent conformity with the breakthrough curves. Nanocellulose/PVA satisfactorily eliminated fluoride from its aqueous solution and can be considered as a suitable bio-sorbent for defluoridation.
    Keywords adsorption ; aqueous solutions ; biosorbents ; biosorption ; cellulose ; defluoridation ; diffusivity ; equations ; fluorides ; heat production ; mass transfer ; neural networks ; pH ; pollution ; polyvinyl alcohol ; research ; sorption isotherms ; sugarcane bagasse ; temperature
    Language English
    Dates of publication 2021-09
    Size p. 47107-47125.
    Publishing place Springer Berlin Heidelberg
    Document type Article
    ZDB-ID 1178791-0
    ISSN 1614-7499 ; 0944-1344
    ISSN (online) 1614-7499
    ISSN 0944-1344
    DOI 10.1007/s11356-021-14026-x
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  5. Article ; Online: Enhanced biosorption of fluoride by extracted nanocellulose/polyvinyl alcohol composite in batch and fixed-bed system: ANN analysis and numerical modeling.

    Das, Lopamudra / Das, Papita / Bhowal, Avijit / Bhattacharjee, Chiranjib

    Environmental science and pollution research international

    2021  Volume 28, Issue 34, Page(s) 47107–47125

    Abstract: The present investigation attempted to examine the defluoridation feasibility onto the extracted nanocellulose/PVA polymer composites. Nanocellulose were derived from sugarcane bagasse and blended with PVA (polyvinyl alcohol) polymer matrix. The ... ...

    Abstract The present investigation attempted to examine the defluoridation feasibility onto the extracted nanocellulose/PVA polymer composites. Nanocellulose were derived from sugarcane bagasse and blended with PVA (polyvinyl alcohol) polymer matrix. The defluoridation potential of nanocellulose/PVA was observed to be significantly dependent on the various operational factors including pH, time interval, etc. the Temkin isotherm (R
    MeSH term(s) Adsorption ; Fluorides ; Hydrogen-Ion Concentration ; Kinetics ; Polyvinyl Alcohol ; Thermodynamics ; Water Pollutants, Chemical/analysis ; Water Purification
    Chemical Substances Water Pollutants, Chemical ; Polyvinyl Alcohol (9002-89-5) ; Fluorides (Q80VPU408O)
    Language English
    Publishing date 2021-04-22
    Publishing country Germany
    Document type Journal Article
    ZDB-ID 1178791-0
    ISSN 1614-7499 ; 0944-1344
    ISSN (online) 1614-7499
    ISSN 0944-1344
    DOI 10.1007/s11356-021-14026-x
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  6. Article: Treatment of malachite green dye containing solution using bio-degradable Sodium alginate/NaOH treated activated sugarcane baggsse charcoal beads: Batch, optimization using response surface methodology and continuous fixed bed column study

    Das, Lopamudra / Das, Papita / Bhowal, Avijit / Bhattachariee, Chiranjib

    Journal of environmental management. 2020 Dec. 15, v. 276

    2020  

    Abstract: In this study, carbonized material was produced using sodium hydroxide treated Sugar cane bagasse (SB), and synthesized materials ware used to prepare Sodium Alginate/SBAC composite beads which were further used as an adsorbent to remove malachite green ... ...

    Abstract In this study, carbonized material was produced using sodium hydroxide treated Sugar cane bagasse (SB), and synthesized materials ware used to prepare Sodium Alginate/SBAC composite beads which were further used as an adsorbent to remove malachite green dye (MG) present in water. Physiochemical characteristics of composite beads were analyzed using FTIR, SEM, TGA, and BET. Adsorption equilibrium data showed excellent fit to the Freundlich model (R² = 0.994) than to the Langmuir model (R² = 0.925). Adsorption kinetics study indicated that the MG removal process would be better described by the pseudo-second-order kinetic model. The thermodynamic study suggested the spontaneous and endothermic nature of MG adsorption. By using response surface methodology, the optimum conditions for MG adsorption on composite beads were found to be 115.43 min, 0.3 g/L and pH 8 for contact time, adsorbent mass, and pH respectively and MG adsorption efficiency was 97.88%. The fixed-bed column data were evaluated using several kinetic models and among them, Thomas model showed the best agreement with investigation results. These results revealed that synthesized composite beads have a high affinity toward MG and it could be reasonable, eco-friendly adsorbent for dye removal from wastewater.
    Keywords adsorbents ; adsorption ; charcoal ; endothermy ; environmental management ; kinetics ; malachite green ; models ; pH ; response surface methodology ; sodium alginate ; sodium hydroxide ; sorption isotherms ; sugarcane ; sugarcane bagasse ; thermodynamics ; wastewater
    Language English
    Dates of publication 2020-1215
    Publishing place Elsevier Ltd
    Document type Article
    Note NAL-AP-2-clean
    ZDB-ID 184882-3
    ISSN 1095-8630 ; 0301-4797
    ISSN (online) 1095-8630
    ISSN 0301-4797
    DOI 10.1016/j.jenvman.2020.111272
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  7. Article: Detection of exon location in eukaryotic DNA using a fuzzy adaptive Gabor wavelet transform

    Das, Lopamudra / Das, J.K / Nanda, Sarita

    Genomics. 2020 Nov., v. 112, no. 6

    2020  

    Abstract: The existing model-independent methods for the detection of exons in DNA could not prove to be ideal as commonly employed fixed window length strategy produces spectral leakage causing signal noise The Modified-Gabor-wavelet-transform exploits a ... ...

    Abstract The existing model-independent methods for the detection of exons in DNA could not prove to be ideal as commonly employed fixed window length strategy produces spectral leakage causing signal noise The Modified-Gabor-wavelet-transform exploits a multiscale strategy to deal with the issue to some extent. Yet, no rule regarding the occurrence of small and large exons has been specified. To overcome this randomness, scaling-factor of GWT has been adapted based on a fuzzy rule. Due to the nucleotides' genetic code and fuzzy behaviors in DNA configuration, this work could adopt the fuzzy approach. Two fuzzy membership functions (large and small) take care of the variation in the coding regions. The fuzzy-based learning parameter adaptively tunes the scale factor for fast and precise prediction of exons. The proposed approach has an immense plus point of being capable of isolating detailed sub-regions in each exon efficiently proving its efficacy comparing with existing techniques.
    Keywords DNA ; exons ; genetic code ; learning ; nucleotides ; prediction ; wavelet
    Language English
    Dates of publication 2020-11
    Size p. 4406-4416.
    Publishing place Elsevier Inc.
    Document type Article
    ZDB-ID 356334-0
    ISSN 1089-8646 ; 0888-7543
    ISSN (online) 1089-8646
    ISSN 0888-7543
    DOI 10.1016/j.ygeno.2020.07.020
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  8. Article: Synthesis of hybrid hydrogel nano-polymer composite using Graphene oxide, Chitosan and PVA and its application in waste water treatment

    Das, Lopamudra / Das, Papita / Bhowal, Avijit / Bhattachariee, Chiranjib

    Environmental technology & innovation. 2020 May, v. 18

    2020  

    Abstract: The present work aimed to synthesize Graphene oxide impregnated chitosan–PVA​ hydrogel nano polymer and its application to remove Congo red dye present in solution. Adsorption of dye on GO fabricated hydrogel polymer was conducted in batch system. ... ...

    Abstract The present work aimed to synthesize Graphene oxide impregnated chitosan–PVA​ hydrogel nano polymer and its application to remove Congo red dye present in solution. Adsorption of dye on GO fabricated hydrogel polymer was conducted in batch system. Prepared Graphene oxide reinforced hydrogel polymer (GORHP) was characterized by analyzing FTIR and SEM. Swelling response of synthesized polymer composite were investigated at different pH. Final concentrations of dye in solution and adsorption capacities of adsorbent at various experimental conditions (adsorbent mass, solution pH and initial adsorbate concentration in solution) were evaluated. At pH 2, dye adsorption efficiency was found as 88.17%for 20 mg/L of Congo red solution using 6g/L dose at 140 rpm rotation speed and at neutral pH condition it was ≃81%. Different adsorption Isotherm models were analyzed mathematically. Kinetic study was performed and evaluated by following different mathematical model. Pseudo second order kinetic model gave better agreement for experimental and model value of qe. Results inferred that this synthesized polymer composite may be an efficient adsorbent for dye removal. The correlation between the independent variables associated with Congo red dye adsorption and the dependent parameters ware established by analyzing ANN model.
    Keywords Congo red ; Fourier transform infrared spectroscopy ; adsorbents ; adsorption ; batch systems ; chitosan ; graphene ; graphene oxide ; hydrogels ; kinetics ; neural networks ; pH ; polymers ; scanning electron microscopy ; sorption isotherms ; wastewater treatment
    Language English
    Dates of publication 2020-05
    Publishing place Elsevier B.V.
    Document type Article
    ISSN 2352-1864
    DOI 10.1016/j.eti.2020.100664
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  9. Article ; Online: Treatment of malachite green dye containing solution using bio-degradable Sodium alginate/NaOH treated activated sugarcane baggsse charcoal beads: Batch, optimization using response surface methodology and continuous fixed bed column study.

    Das, Lopamudra / Das, Papita / Bhowal, Avijit / Bhattachariee, Chiranjib

    Journal of environmental management

    2020  Volume 276, Page(s) 111272

    Abstract: In this study, carbonized material was produced using sodium hydroxide treated Sugar cane bagasse (SB), and synthesized materials ware used to prepare Sodium Alginate/SBAC composite beads which were further used as an adsorbent to remove malachite green ... ...

    Abstract In this study, carbonized material was produced using sodium hydroxide treated Sugar cane bagasse (SB), and synthesized materials ware used to prepare Sodium Alginate/SBAC composite beads which were further used as an adsorbent to remove malachite green dye (MG) present in water. Physiochemical characteristics of composite beads were analyzed using FTIR, SEM, TGA, and BET. Adsorption equilibrium data showed excellent fit to the Freundlich model (R
    MeSH term(s) Adsorption ; Alginates ; Charcoal ; Hydrogen-Ion Concentration ; Kinetics ; Rosaniline Dyes ; Saccharum ; Sodium Hydroxide ; Water Pollutants, Chemical
    Chemical Substances Alginates ; Rosaniline Dyes ; Water Pollutants, Chemical ; malachite green (12058M7ORO) ; Charcoal (16291-96-6) ; Sodium Hydroxide (55X04QC32I)
    Language English
    Publishing date 2020-08-29
    Publishing country England
    Document type Journal Article
    ZDB-ID 184882-3
    ISSN 1095-8630 ; 0301-4797
    ISSN (online) 1095-8630
    ISSN 0301-4797
    DOI 10.1016/j.jenvman.2020.111272
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  10. Article ; Online: Hereditary disease prediction in eukaryotic DNA: an adaptive signal processing approach.

    Das, Lopamudra / Nanda, Sarita / Das, J K

    Nucleosides, nucleotides & nucleic acids

    2020  Volume 39, Issue 8, Page(s) 1179–1199

    Abstract: Hereditary disease prediction in eukaryotic DNA using signal processing approaches is an incredible work in bioinformatics. Researchers of various fields are trying to put forth a noninvasive approach to forecast the disease-related genes. As diseased ... ...

    Abstract Hereditary disease prediction in eukaryotic DNA using signal processing approaches is an incredible work in bioinformatics. Researchers of various fields are trying to put forth a noninvasive approach to forecast the disease-related genes. As diseased genes are more random than the healthy ones, in this work, a comparison of the diseased gene is made against the healthy ones. An adaptive signal processing method like functional link artificial neural network-based Levenberg-Marquardt filter has been proposed in this regard. For parameter upgradation, the algorithm is modified using particle swarm optimization. Here, disease genes are discriminated from healthy ones based on the magnitude of mean square error (MSE), which is calculated through the adaptive filter. The performance of the algorithm is inspected by computing some evaluation parameters. Since accuracy is the prime concern, authors in this work have taken an attempt to improve the accuracy level compared to the existing methods. Taking the reference gene as healthy, the overall process is accomplished by categorizing the diseased and healthy targets with MSE value at a threshold of 0.012. The proposed technique predicts the test gene sets successfully.
    MeSH term(s) Algorithms ; Computational Biology ; DNA/genetics ; Eukaryota/genetics ; Genetic Diseases, Inborn/genetics ; Humans ; Mutation ; Neural Networks, Computer
    Chemical Substances DNA (9007-49-2)
    Keywords covid19
    Language English
    Publishing date 2020-06-22
    Publishing country United States
    Document type Journal Article
    ZDB-ID 2008956-9
    ISSN 1532-2335 ; 1525-7770
    ISSN (online) 1532-2335
    ISSN 1525-7770
    DOI 10.1080/15257770.2020.1780440
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