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  1. Article ; Online: Celebrating 50 years of microbial granulation technologies: From canonical wastewater management to bio-product recovery.

    Sethi, Shradhanjali / Gupta, Rohan / Bharshankh, Ankita / Sahu, Rojalin / Biswas, Rima

    The Science of the total environment

    2023  Volume 872, Page(s) 162213

    Abstract: Microbial granulation technologies (MGT) in wastewater management are widely practised for more than fifty years. MGT can be considered a fine example of human innovativeness-driven nature wherein the manmade forces applied during operational controls in ...

    Abstract Microbial granulation technologies (MGT) in wastewater management are widely practised for more than fifty years. MGT can be considered a fine example of human innovativeness-driven nature wherein the manmade forces applied during operational controls in the biological process of wastewater treatment drive the microbial communities to modify their biofilms into granules. Mankind, over the past half a century, has been refining the knowledge of triggering biofilm into granules with some definite success. This review captures the journey of MGT from inception to maturation providing meaningful insights into the process development of MGT-based wastewater management. The full-scale application of MGT-based wastewater management is discussed with an understanding of functional microbial interactions within the granule. The molecular mechanism of granulation through the secretion of extracellular polymeric substances (EPS) and signal molecules is also highlighted in detail. The recent research interest in the recovery of useful bioproducts from the granular EPS is also emphasized.
    MeSH term(s) Humans ; Wastewater ; Biofilms ; Extracellular Polymeric Substance Matrix ; Quorum Sensing ; Microbial Interactions ; Sewage ; Bioreactors
    Chemical Substances Wastewater ; Sewage
    Language English
    Publishing date 2023-02-14
    Publishing country Netherlands
    Document type Journal Article ; Review
    ZDB-ID 121506-1
    ISSN 1879-1026 ; 0048-9697
    ISSN (online) 1879-1026
    ISSN 0048-9697
    DOI 10.1016/j.scitotenv.2023.162213
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  2. Article ; Online: Long-term effect of seasonal and constant low temperatures on mesophilic biomass treating sewage in continuously stirred tank anaerobic granular reactor.

    Gupta, Rohan / Sethi, Shradhanjali / Sahu, Rojalin / Bharshankh, Ankita / Biswas, Rima

    Bioresource technology

    2023  Volume 386, Page(s) 129471

    Abstract: A Continuously Stirred Tank Anaerobic Granular Reactor seeded with mesophilic biomass was studied for 1733 days analysing the impact of seasonal (12-23 °C) and controlled (8-15 °C) low temperatures on anaerobic treatment of sewage. Aided by intermittent ... ...

    Abstract A Continuously Stirred Tank Anaerobic Granular Reactor seeded with mesophilic biomass was studied for 1733 days analysing the impact of seasonal (12-23 °C) and controlled (8-15 °C) low temperatures on anaerobic treatment of sewage. Aided by intermittent dosing of 0.04% (v/v) methanol, the microbiota quickly adapted to temperature fluctuations. Chemical oxygen demand (COD) removal efficiency was high but low temperatures affected methane production. Under low-temperature stress, the Methanomythylovorans and Methanosaeta-dominated methanogenic community shifted focus to cellular repair and transport, with carbon diversion towards assimilative pathways, thereby decreasing methane yields. Specific methanogenic activity at 15 °C and 30 °C increased by five and four times, respectively, from their initial values indicating microbiota retained its mesophilic properties. Despite lower methane yield, stable and high COD removals, along with low dissolved methane and volatile fatty acids indicated that low-temperature anaerobic sewage treatment using mesophilic biomass in the long run is sustainable.
    MeSH term(s) Sewage ; Temperature ; Anaerobiosis ; Bioreactors ; Biomass ; Seasons ; Euryarchaeota ; Methane/analysis
    Chemical Substances Sewage ; Methane (OP0UW79H66)
    Language English
    Publishing date 2023-07-13
    Publishing country England
    Document type Journal Article
    ZDB-ID 1065195-0
    ISSN 1873-2976 ; 0960-8524
    ISSN (online) 1873-2976
    ISSN 0960-8524
    DOI 10.1016/j.biortech.2023.129471
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  3. Article ; Online: Long-term effect of seasonal and constant low temperatures on mesophilic biomass treating sewage in continuously stirred tank anaerobic granular reactor

    Gupta, Rohan / Sethi, Shradhanjali / Sahu, Rojalin / Bharshankh, Ankita / Biswas, Rima

    Bioresource Technology. 2023 Oct., v. 386 p.129471-

    2023  

    Abstract: A Continuously Stirred Tank Anaerobic Granular Reactor seeded with mesophilic biomass was studied for 1733 days analysing the impact of seasonal (12–23 °C) and controlled (8–15 °C) low temperatures on anaerobic treatment of sewage. Aided by intermittent ... ...

    Abstract A Continuously Stirred Tank Anaerobic Granular Reactor seeded with mesophilic biomass was studied for 1733 days analysing the impact of seasonal (12–23 °C) and controlled (8–15 °C) low temperatures on anaerobic treatment of sewage. Aided by intermittent dosing of 0.04% (v/v) methanol, the microbiota quickly adapted to temperature fluctuations. Chemical oxygen demand (COD) removal efficiency was high but low temperatures affected methane production. Under low-temperature stress, the Methanomythylovorans and Methanosaeta-dominated methanogenic community shifted focus to cellular repair and transport, with carbon diversion towards assimilative pathways, thereby decreasing methane yields. Specific methanogenic activity at 15 °C and 30 °C increased by five and four times, respectively, from their initial values indicating microbiota retained its mesophilic properties. Despite lower methane yield, stable and high COD removals, along with low dissolved methane and volatile fatty acids indicated that low-temperature anaerobic sewage treatment using mesophilic biomass in the long run is sustainable.
    Keywords anaerobic treatment ; biomass ; carbon ; chemical oxygen demand ; cold stress ; long term effects ; methane ; methane production ; methanogens ; sewage ; sewage treatment ; temperature ; Dissolved methane ; Methanol ; Psychrotolerant methanogenic community ; Gene mapping ; Carbon diversion
    Language English
    Dates of publication 2023-10
    Publishing place Elsevier Ltd
    Document type Article ; Online
    ZDB-ID 1065195-0
    ISSN 1873-2976 ; 0960-8524
    ISSN (online) 1873-2976
    ISSN 0960-8524
    DOI 10.1016/j.biortech.2023.129471
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  4. Article ; Online: Molecular dynamics simulation perception study of the binding affinity performance for main protease of SARS-CoV-2.

    Sahu, Satya Narayan / Mishra, Biswajit / Sahu, Rojalin / Pattanayak, Subrat Kumar

    Journal of biomolecular structure & dynamics

    2020  Volume 40, Issue 6, Page(s) 2444–2459

    Abstract: Like common cold and flu, SARC-CoV-2 virus spreads by droplets of sneezes or coughs which virus affects people of various age groups. Today, this virus is almost distributed all over the world. Since binding process plays a crucial role between host and ... ...

    Abstract Like common cold and flu, SARC-CoV-2 virus spreads by droplets of sneezes or coughs which virus affects people of various age groups. Today, this virus is almost distributed all over the world. Since binding process plays a crucial role between host and receptor, therefore, we studied the molecules intended toward inhibition process through molecular docking and molecular dynamics simulation process. From the molecular docking study, it is noteworthy that remdesivir shows better binding affinity toward the main protease of SARS-CoV2 compared to other studied drugs. Within studied phytochemicals, carnosic acid shows better binding poses toward main protease of SARS-CoV2 among studied phytochemicals. The amino acid residues GLN110 and PHE294 were almost found in all the studied interactions of drugs and phytochemicals with main protease of SARS-CoV-2. Furthermore, the results show a larger contribution of the Van der Waals energies as compared to others like electrostatic energies suggesting that ligands at the binding pocket are predominantly stabilized by hydrophobic interactions. The conformational change during ligand binding was predicted from Gibbs free energy landscape analysis through molecular dynamics simulation. We observed that, there were two main free energy basins for both docked carnosic acid complex and for docked remdesivir complex, only one main free energy basin was found in the global free energy minimum region.Communicated by Ramaswamy H. Sarma.
    MeSH term(s) COVID-19/drug therapy ; Coronavirus 3C Proteases/metabolism ; Humans ; Molecular Docking Simulation ; Molecular Dynamics Simulation ; SARS-CoV-2
    Chemical Substances 3C-like proteinase, SARS-CoV-2 (EC 3.4.22.-) ; Coronavirus 3C Proteases (EC 3.4.22.28)
    Language English
    Publishing date 2020-11-23
    Publishing country England
    Document type Journal Article
    ZDB-ID 49157-3
    ISSN 1538-0254 ; 0739-1102
    ISSN (online) 1538-0254
    ISSN 0739-1102
    DOI 10.1080/07391102.2020.1850362
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  5. Article: The Journey from Porous Materials to Metal-organic Frameworks and their Catalytic Applications: A Review.

    Panda, Jagannath / Sahoo, Tejaswini / Swain, Jaykishon / Panda, Prasanna Kumar / Tripathy, Bankim Chandra / Samantaray, Raghabendra / Sahu, Rojalin

    Current organic synthesis

    2022  Volume 20, Issue 2, Page(s) 220–237

    Abstract: Metal-Organic Frameworks (MOFs), a class of inorganic-organic hybrid materials, have been at the center of material science for the past three decades. They are synthesized by metal ions and organic linker precursors and have become very potential ... ...

    Abstract Metal-Organic Frameworks (MOFs), a class of inorganic-organic hybrid materials, have been at the center of material science for the past three decades. They are synthesized by metal ions and organic linker precursors and have become very potential materials for different applications ranging from sensing, separation, catalytic behaviour to biomedical applications and drug delivery, owing to their structural flexibility, porosity and functionality. They are also very promising in heterogeneous catalysis for various industrial applications. These catalysts can be easily synthesized with extremely high surface areas, tunable pore sizes, and incorporation of catalytic centers via post-synthetic modification (PSM) or exchange of their components as compared to traditional heterogeneous catalysts, which is the preliminary requirement of a better catalyst. Here, in this review, we have presented the history of MOFs, different synthesis procedures, and MOFcatalysed reactions; for instance, coupling reactions, condensation reactions, Friedel-Crafts reaction, oxidation, etc. Special attention has been given to MOFs containing different catalytic centers, including open metal sites, incorporation of catalytic centers through PSM, and bifunctional acidbase sites. The important role of catalytic centers present in MOFs and reaction mechanisms have also been outlined with examples.
    Language English
    Publishing date 2022-02-26
    Publishing country United Arab Emirates
    Document type Journal Article
    ISSN 1570-1794
    ISSN 1570-1794
    DOI 10.2174/1570179419666220223093955
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  6. Article ; Online: Encapsulation of zinc-rifampicin complex into transferrin-conjugated silver quantum-dots improves its antimycobacterial activity and stability and facilitates drug delivery into macrophages.

    Pati, Rashmirekha / Sahu, Rojalin / Panda, Jagannath / Sonawane, Avinash

    Scientific reports

    2016  Volume 6, Page(s) 24184

    Abstract: In order to improve the chemotherapy of tuberculosis, there is an urgent need to enhance the efficacy of existing agents and also to develop more efficient drug delivery systems. Here, we synthesized a novel anti-TB drug complex consisting of zinc and ... ...

    Abstract In order to improve the chemotherapy of tuberculosis, there is an urgent need to enhance the efficacy of existing agents and also to develop more efficient drug delivery systems. Here, we synthesized a novel anti-TB drug complex consisting of zinc and rifampicin (Zn-RIF), and encapsulated it into transferrin-conjugated silver quantum-dots (Zn-RIF-Tf-QD) to improve delivery in macrophages. Successful synthesis of Zn-RIF and Zn-RIF-Tf-QD was confirmed by UV/Vis-spectroscopy, TEM, FTIR, photoluminescence, XRD, XPS, and NMR. The sizes of silver QDs and transferrin-conjugated QDs were found to be in the range of 5-20 nm. Activity assays showed that Zn-RIF-Tf-QD exhibited 10-fold higher antibacterial activity against Mycobacterium smegmatis and Mycobacterium bovis-BCG as compared to Zn-RIF, RIF and Zn. Immunofluorescence studies showed that Zn-RIF-Tf-QD-conjugates were actively endocytosed by macrophages and dendritic cells, but not by lung epithelial cells. Treatment with Zn-RIF-Tf-QD efficiently killed mycobacteria residing inside macrophages without exhibiting cytotoxicity and genotoxicity. Moreover, the conjugates remained stable for upto 48 h, were taken up into the late endosomal compartment of macrophages, and released the drug in a sustainable manner. Our data demonstrate that Zn-RIF-Tf-QDs have a great potential as anti-TB drugs. In addition, transferrin-conjugated QDs may constitute an effective drug delivery system for tuberculosis therapy.
    MeSH term(s) A549 Cells ; Animals ; Antitubercular Agents/chemistry ; Antitubercular Agents/metabolism ; Antitubercular Agents/pharmacology ; Cell Survival/drug effects ; Drug Carriers/chemistry ; Endocytosis ; Humans ; Macrophages/cytology ; Macrophages/metabolism ; Macrophages/microbiology ; Magnetic Resonance Spectroscopy ; Mice ; Microscopy, Fluorescence ; Mycobacterium bovis/drug effects ; Mycobacterium smegmatis/drug effects ; Particle Size ; Photoelectron Spectroscopy ; Quantum Dots/chemistry ; Rifampin/chemistry ; Rifampin/metabolism ; Rifampin/pharmacology ; Silver/chemistry ; Spectroscopy, Fourier Transform Infrared ; Transferrin/chemistry ; Zinc/chemistry
    Chemical Substances Antitubercular Agents ; Drug Carriers ; Transferrin ; Silver (3M4G523W1G) ; Zinc (J41CSQ7QDS) ; Rifampin (VJT6J7R4TR)
    Language English
    Publishing date 2016-04-26
    Publishing country England
    Document type Journal Article ; Research Support, Non-U.S. Gov't
    ZDB-ID 2615211-3
    ISSN 2045-2322 ; 2045-2322
    ISSN (online) 2045-2322
    ISSN 2045-2322
    DOI 10.1038/srep24184
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  7. Article: Efficient removal of two anionic dyes by a highly robust zirconium based metal organic framework from aqueous medium: Experimental findings with molecular docking study

    Panda, Jagannath / Sahu, Satya Narayan / Sahoo, Jitendra Kumar / Biswal, Soumya P / Pattanayak, Subrat Kumar / Samantaray, Raghabendra / Sahu, Rojalin

    Environmental nanotechnology, monitoring & management. 2020 Dec., v. 14

    2020  

    Abstract: A Zr (IV) based Metal Organic Framework (MOF), UiO-66 has been synthesized by hydrothermal method, and its application for adsorption of two industrially important anionic dyes, Reactive Blue (RB) and Congo Red (CR) was studied. The MOF was thoroughly ... ...

    Abstract A Zr (IV) based Metal Organic Framework (MOF), UiO-66 has been synthesized by hydrothermal method, and its application for adsorption of two industrially important anionic dyes, Reactive Blue (RB) and Congo Red (CR) was studied. The MOF was thoroughly characterized by Powder X-ray Diffraction (PXRD),UV-vis Diffused Reflectance Spectra (UV-DRS), Fourier-transform Infrared spectroscopy (FT-IR),Thermo Gravimetric Analysis (TGA), N₂ adsorption isotherm, ¹H Nuclear Magnetic Resonance spectra (¹H NMR), Scanning Electronic Microscopy (SEM) and Transmission Electron Microscopy (TEM). From the obtained results, it has been confirmed that our synthesized MOF is mesoporous in nature. The hierarchical adsorption behavior of the MOF has been studied with the dyes, CR and RB by both experimental and molecular docking methods. The binding energy of UiO-66 was found to be -12.82 kcal/mol with CR and -9.42 kcal/mol with RB. Hydrogen bonding and hydrophobic interaction plays a crucial role during adsorption process of both the dyes. Both ligand efficiency and binding energy of CR is found higher as compared to RB. The comprehensive evidences from our experimental as well as molecular docking studies clearly demonstrated that adsorption of CR is higher as compared to RB by the MOF, UiO-66.
    Keywords Fourier transform infrared spectroscopy ; X-ray diffraction ; administrative management ; adsorption ; coordination polymers ; energy ; hot water treatment ; hydrogen ; hydrophobic bonding ; ligands ; nuclear magnetic resonance spectroscopy ; porous media ; reflectance ; sorption isotherms ; transmission electron microscopy ; zirconium
    Language English
    Dates of publication 2020-12
    Publishing place Elsevier B.V.
    Document type Article
    Note NAL-AP-2-clean
    ZDB-ID 2821777-9
    ISSN 2215-1532
    ISSN 2215-1532
    DOI 10.1016/j.enmm.2020.100340
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  8. Article: Green Solvent: Green Shadow on Chemical Synthesis.

    Sahoo, Tejaswini / Panda, Jagannath / Sahu, Jnanaranjan / Sarangi, Dayananda / Sahoo, Sunil K / Nanda, Braja B / Sahu, Rojalin

    Current organic synthesis

    2020  Volume 17, Issue 6, Page(s) 426–439

    Abstract: The natural beauty and purity of our planet has been contaminated deeply due to human selfish activities such as pollution, improper waste management, and various industrial and commercial discharges of untreated toxic by-products into the lap of nature. ...

    Abstract The natural beauty and purity of our planet has been contaminated deeply due to human selfish activities such as pollution, improper waste management, and various industrial and commercial discharges of untreated toxic by-products into the lap of nature. The collective impact of these hazardous suspensions into the natural habitat is very deadly. Challenges due to human activity on the environment have become ubiquitous. The chemical industry has a major role in human evolution and, predictably, opened gates of increased risk of pollution if the production is not done sustainably. In these circumstances, the notion of Green Chemistry has been identified as the efficient medium of synthesis of chemicals and procedures to eradicate the toxic production of harmful substances. Principles of Green Chemistry guide the scientist in their hunt towards chemical synthesis which requires the use of solvents. These solvents contaminate our air, water, land and surrounding due to its toxic properties. Even though sufficient precautions are taken for proper disposal of these solvents but it is difficult to be recycled. In order to preserve our future and coming generation from the adverse impacts associated with solvents it is very important to find alternative of this which will be easy to use, reusable and also eco-friendly. Solvents are used daily in various industrial processes as reaction medium, as diluters, and in separation procedures. As reaction medium, the role of solvent is to bring catalysts and reactants together and to release heat thus affecting activity and selectivity. The proper selection of the solvent considering its biological, physical and chemical properties is very necessary for product separation, environmental, safety handling and economic factors. Green solvents are the boon in this context. They are not only environmentally benign but also cost effective. The biggest challenge faced by the chemists is adaptation of methods and selection of solvents during chemical synthesis which will give negligible waste product and will remain human and nature friendly. During designing compounds for a particular reaction it is difficult to give assurance regarding the toxicity and biodegradability of the method. Chemists are still far away from predicting the various chemical and biological effects of the compounds on the back of the envelope. To achieve that point is formidable task but it will definitely act as inspiration for the coming generation of chemists. The green solvents are undoubtedly a far better approach to eliminate the negative impacts and aftermath of any chemical synthesis on the environment. Our study in this review covers an overview of green solvents, their role in safer chemical synthesis with reference to some of the important green solvents and their detail summarization.
    Language English
    Publishing date 2020-05-05
    Publishing country United Arab Emirates
    Document type Journal Article ; Research Support, Non-U.S. Gov't
    ISSN 1570-1794
    ISSN 1570-1794
    DOI 10.2174/1570179417666200506102535
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  9. Article: A thiazolo[5,4-d]thiazole-bridged porphyrin organic framework as a promising nonlinear optical material

    Samal, Mahalaxmi / Biswal, Bishnu P / Rao, D. Narayana / Rao, M. Veeramohan / Saad, Nabil A / Sahu, Rojalin / Valligatla, Sreeramulu

    Chemical communications. 2019 Sept. 12, v. 55, no. 74

    2019  

    Abstract: Porphyrin-based porous organic frameworks are an important group of materials gaining interest due to their structural diversity and distinct opto-electronic properties. However, these materials are seldom explored for nonlinear optical (NLO) ... ...

    Abstract Porphyrin-based porous organic frameworks are an important group of materials gaining interest due to their structural diversity and distinct opto-electronic properties. However, these materials are seldom explored for nonlinear optical (NLO) applications. In this work, we investigate a thiazolo[5,4-d]thiazole-bridged porous, porphyrin framework (Por-TzTz-POF) with promising NLO properties. The planar TzTz moiety coupled with integrated porphyrin units enables efficient π-conjugation and charge distribution in the Por-TzTz-POF resulting in a high nonlinear absorption coefficient (β = 1100 cm GW−1) with figure of merit (FoM) σ1/σ0 = 5571, in contrast to analogous molecules and material counterparts e.g. metal–organic frameworks (MOFs; β = ∼0.3–0.5 cm GW−1), molecular porphyrins (β = ∼100–400 cm GW−1), graphene (β = 900 cm GW−1), and covalent organic frameworks (Por-COF-HH; β = 1040 cm GW−1 and FoM = 3534).
    Keywords absorbance ; chemical reactions ; coordination polymers ; graphene ; moieties ; porphyrins
    Language English
    Dates of publication 2019-0912
    Size p. 11025-11028.
    Publishing place The Royal Society of Chemistry
    Document type Article
    ZDB-ID 1472881-3
    ISSN 1364-548X ; 1359-7345 ; 0009-241X
    ISSN (online) 1364-548X
    ISSN 1359-7345 ; 0009-241X
    DOI 10.1039/c9cc05415d
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  10. Article ; Online: A thiazolo[5,4-d]thiazole-bridged porphyrin organic framework as a promising nonlinear optical material.

    Samal, Mahalaxmi / Valligatla, Sreeramulu / Saad, Nabil A / Rao, M Veeramohan / Rao, D Narayana / Sahu, Rojalin / Biswal, Bishnu P

    Chemical communications (Cambridge, England)

    2019  Volume 55, Issue 74, Page(s) 11025–11028

    Abstract: Porphyrin-based porous organic frameworks are an important group of materials gaining interest due to their structural diversity and distinct opto-electronic properties. However, these materials are seldom explored for nonlinear optical (NLO) ... ...

    Abstract Porphyrin-based porous organic frameworks are an important group of materials gaining interest due to their structural diversity and distinct opto-electronic properties. However, these materials are seldom explored for nonlinear optical (NLO) applications. In this work, we investigate a thiazolo[5,4-d]thiazole-bridged porous, porphyrin framework (Por-TzTz-POF) with promising NLO properties. The planar TzTz moiety coupled with integrated porphyrin units enables efficient π-conjugation and charge distribution in the Por-TzTz-POF resulting in a high nonlinear absorption coefficient (β = 1100 cm GW
    Language English
    Publishing date 2019-08-27
    Publishing country England
    Document type Journal Article
    ZDB-ID 1472881-3
    ISSN 1364-548X ; 1359-7345 ; 0009-241X
    ISSN (online) 1364-548X
    ISSN 1359-7345 ; 0009-241X
    DOI 10.1039/c9cc05415d
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