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Article ; Online: SOLVENTS: From Past to Present.

Mainkar, Prathama / Ray, Anjan / Chandrasekhar, Srivari

ACS omega

2024 Volume 9, Issue 7, Page(s) 7271–7276

Abstract: Technological advancements in organic chemistry cannot be imagined without solvents, an essential evil due to well-recognized safety, health, and environmental risks and yet an integral part of the value chain for almost all industrially manufactured ... ...

Abstract	Technological advancements in organic chemistry cannot be imagined without solvents, an essential evil due to well-recognized safety, health, and environmental risks and yet an integral part of the value chain for almost all industrially manufactured products intended for human use. A solvent serves as an essential liquid medium for different molecules to interact and react, generating products totally different from the original reactants. Reminiscences reveal water to be the first solvent used in the art of organic chemistry. This Viewpoint attempts to capture anecdotal theories and evidence on the use of this "magic liquid" and the progressive adoption of alternative liquid solvents, which have played a pivotal role in the evolution of synthetic organic chemistry. Synthetic organic chemistry, in turn, has sought to compete with nature in mimicking complex natural product syntheses in the laboratory on miniscule time scales compared with millions of years of evolutionary processes.
Language	English
Publishing date	2024-02-06
Publishing country	United States
Document type	Journal Article
ISSN	2470-1343
ISSN (online)	2470-1343
DOI	10.1021/acsomega.3c07508
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Article ; Online: Fruit waste-derived cellulose-polyaniline composite for adsorption-coupled reduction of chromium oxyanions.

Joshi, Pratiksha / Mehta, Sweta / Goswami, Ramesh N / Srivastava, Manoj / Ray, Anjan / Khatri, Om P

Environmental science and pollution research international

2024 Volume 31, Issue 6, Page(s) 8719–8735

Abstract: Hexavalent chromium oxyanions, known as potentially toxic micropollutants, exist in the effluents and discharges of metallurgical, electroplating, refractory, chemical, and tanning industries. The exposure of chromium-contaminated water causes severe ... ...

Abstract	Hexavalent chromium oxyanions, known as potentially toxic micropollutants, exist in the effluents and discharges of metallurgical, electroplating, refractory, chemical, and tanning industries. The exposure of chromium-contaminated water causes severe health hazards. The present work outlines a facile approach to grow polyaniline (PANI) on fruit-waste-derived cellulose (CEL) via oxidative polymerization of aniline; followed by chemical processing with NH
MeSH term(s)	Cellulose/chemistry ; Fruit/chemistry ; Adsorption ; Water Pollutants, Chemical/analysis ; Chromium/chemistry ; Aniline Compounds/chemistry ; Imines ; Kinetics ; Hydrogen-Ion Concentration
Chemical Substances	Cellulose (9004-34-6) ; chromium hexavalent ion (18540-29-9) ; polyaniline ; Water Pollutants, Chemical ; Chromium (0R0008Q3JB) ; Aniline Compounds ; Imines
Language	English
Publishing date	2024-01-05
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/s11356-023-31511-7
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Article ; Online: Challenges and prospects of microbial α-amylases for industrial application: a review.

Ashok, Patel Pratima / Dasgupta, Diptarka / Ray, Anjan / Suman, Sunil K

World journal of microbiology & biotechnology

2023 Volume 40, Issue 2, Page(s) 44

Abstract: α-Amylases are essential biocatalysts representing a billion-dollar market with significant long-term global demand. They have varied applications ranging from detergent, textile, and food sectors such as bakery to, more recently, biofuel industries. ... ...

Abstract	α-Amylases are essential biocatalysts representing a billion-dollar market with significant long-term global demand. They have varied applications ranging from detergent, textile, and food sectors such as bakery to, more recently, biofuel industries. Microbial α-amylases have distinct advantages over their plant and animal counterparts owing to generally good activities and better stability at temperature and pH extremes. With the scope of applications expanding, the need for new and improved α-amylases is ever-growing. However, scaling up microbial α-amylase technology from the laboratory to industry for practical applications is impeded by several issues, ranging from mass transfer limitations, low enzyme yields, and energy-intensive product recovery that adds to high production costs. This review highlights the major challenges and prospects for the production of microbial α-amylases, considering the various avenues of industrial bioprocessing such as culture-independent approaches, nutrient optimization, bioreactor operations with design improvements, and product down-streaming approaches towards developing efficient α-amylases with high activity and recyclability. Since the sequence and structure of the enzyme play a crucial role in modulating its functional properties, we have also tried to analyze the structural composition of microbial α-amylase as a guide to its thermodynamic properties to identify the areas that can be targeted for enhancing the catalytic activity and thermostability of the enzyme through varied immobilization or selective enzyme engineering approaches. Also, the utilization of inexpensive and renewable substrates for enzyme production to isolate α-amylases with non-conventional applications has been briefly discussed.
MeSH term(s)	Animals ; alpha-Amylases/chemistry ; Amylases/metabolism ; Temperature ; Enzyme Stability
Chemical Substances	alpha-Amylases (EC 3.2.1.1) ; Amylases (EC 3.2.1.-)
Language	English
Publishing date	2023-12-20
Publishing country	Germany
Document type	Journal Article ; Review
ZDB-ID	1499109-3
ISSN	1573-0972 ; 0959-3993
ISSN (online)	1573-0972
ISSN	0959-3993
DOI	10.1007/s11274-023-03821-y
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Article: Correction: Removal of Petroleum Contaminants Through Bioremediation with Integrated Concepts of Resource Recovery: A Review.

Imam, Arfin / Kanaujia, Pankaj Kumar / Ray, Anjan / Suman, Sunil Kumar

Indian journal of microbiology

2023 Volume 63, Issue 1, Page(s) 159

Abstract: This corrects the article DOI: 10.1007/s12088-021-00928-4.]. ...

Abstract	[This corrects the article DOI: 10.1007/s12088-021-00928-4.].
Language	English
Publishing date	2023-03-16
Publishing country	India
Document type	Published Erratum
ZDB-ID	413422-9
ISSN	0973-7715 ; 0046-8991
ISSN (online)	0973-7715
ISSN	0046-8991
DOI	10.1007/s12088-023-01072-x
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Article ; Online: Trends in fisheries waste utilization: a valuable resource of nutrients and valorized products for the food industry.

Naseem, Shifa / Imam, Arfin / Rayadurga, Anantha Sreepada / Ray, Anjan / Suman, Sunil Kumar

Critical reviews in food science and nutrition

2023 , Page(s) 1–21

Abstract: The rise in fisheries production worldwide has caused a remarkable increase in associated anthropogenic waste. This poses significant concerns due to adverse environmental impacts and economic losses. Owing to its renewability, high abundance, and ... ...

Abstract	The rise in fisheries production worldwide has caused a remarkable increase in associated anthropogenic waste. This poses significant concerns due to adverse environmental impacts and economic losses. Owing to its renewability, high abundance, and potential as a rich source of many nutrients and bioactive compounds, strategies have been developed to convert fish waste into different value-added products. Conventional and improved methods have been used for the extraction of biomolecules from fish waste. The extracted fish waste-derived value-added products such as enzymes, peptides, fish oil, etc. have been used to fortify different food products. This review aims to provide an overview of the nature and composition of fish waste, strategies for extracting biomolecules from fish waste, and the potential application of fish waste as a source of calcium and other nutrients in food fortification and animal feed has been discussed. In context to fishery waste mitigation, valorization, and circular bioeconomy approach are gaining momentum, aiming to eliminate waste while producing high-quality value-added food and feed products from fishery discards.
Language	English
Publishing date	2023-05-15
Publishing country	United States
Document type	Journal Article
ZDB-ID	1037504-1
ISSN	1549-7852 ; 1040-8398
ISSN (online)	1549-7852
ISSN	1040-8398
DOI	10.1080/10408398.2023.2211167
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Article ; Online: Correction to: Pyrene remediation by Trametes maxima: an insight into secretome response and degradation pathway.

Imam, Arfin / Suman, Sunil Kumar / Vempatapu, Bhanu Prasad / Tripathi, Deependra / Ray, Anjan / Kanaujia, Pankaj K

Environmental science and pollution research international

2023 Volume 30, Issue 18, Page(s) 54252

Language	English
Publishing date	2023-02-27
Publishing country	Germany
Document type	Published Erratum
ZDB-ID	1178791-0
ISSN	1614-7499 ; 0944-1344
ISSN (online)	1614-7499
ISSN	0944-1344
DOI	10.1007/s11356-023-26148-5
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Article: The Effect of Impeller–Sparger Geometry on the Gas Holdup in an Oxygen–Water System Using an Agitated and Sparged Tank Contactor

Ganguly, Sudip K. / Majumder, Chandrajit B. / Ray, Anjan

Industrial & engineering chemistry process design and development. 2021 July 09, v. 60, no. 28

2021

Abstract: Gas–liquid (G-L) reaction kinetics studies need ideally to be carried out (a) in the total recirculation regime, signifying maximum mass transfer rates (KLS) and (b) in contactors, which geometrically support higher KLS. G-L mixing enhancement by ... ...

Abstract	Gas–liquid (G-L) reaction kinetics studies need ideally to be carried out (a) in the total recirculation regime, signifying maximum mass transfer rates (KLS) and (b) in contactors, which geometrically support higher KLS. G-L mixing enhancement by agitation and gas sparging is generally practiced to enhance KLS. The agitated and sparged tank contactor (ASTC) consisting of baffles, stirrers, and spargers is the preferred mode of contacting. It is essential to understand how the impeller–sparger geometry affects KLS in a standard ASTC while operating in the total recirculation regime. A film theory-based approach shows that KLS may be approximated by the gas holdup (εg) in the total recirculation regime. Combinations of standard radial and axial impellers with ring spargers of different sizes are used in an ASTC of 0.25 m diameter containing 1 × 10–² m³ water. The oxygen flow rate (Qg) is varied from (6.26 to 25.02 × 10–⁵) m³ s–¹, and agitation intensity (N₀) is varied from (1.67 to 16.67) rps at the temperature (θ) = 313 K under atmospheric pressure to understand the effects of geometry on εg while operating in the total recirculation regime. Results of our investigations show how an ASTC with an impeller of high-power number (NP) and a ring sparger of near impeller diameter (D) form an ideal combination and will result in maximum εg (indirectly optimum KLS), making it suitable for kinetics studies.
Keywords	agitation ; atmospheric pressure ; geometry ; impellers ; mass transfer ; oxygen ; process design ; reaction kinetics ; temperature
Language	English
Dates of publication	2021-0709
Size	p. 10445-10453.
Publishing place	American Chemical Society
Document type	Article
ZDB-ID	1484436-9
ISSN	1520-5045 ; 0888-5885
ISSN (online)	1520-5045
ISSN	0888-5885
DOI	10.1021/acs.iecr.1c01435
Database	NAL-Catalogue (AGRICOLA)

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Article: Biological machinery for polycyclic aromatic hydrocarbons degradation: A review

Imam, Arfin / Kumar Suman, Sunil / Kanaujia, Pankaj K. / Ray, Anjan

Bioresource technology. 2022 Jan., v. 343

2022

Abstract: Polycyclic aromatic hydrocarbons (PAHs) are hazardous environmental pollutants with widespread and well-recognized health concerns. Amidst more than a hundred known PAHs, 16 are categorized as priority pollutants. Use of widely diverse biological ... ...

Abstract	Polycyclic aromatic hydrocarbons (PAHs) are hazardous environmental pollutants with widespread and well-recognized health concerns. Amidst more than a hundred known PAHs, 16 are categorized as priority pollutants. Use of widely diverse biological machinery comprising bacteria, fungi, and algae harnessed from contaminated sites has emerged as an ecologically safe and sustainable approach for PAH degradation. The potential of these biological systems has been thoroughly examined to maximize the degradation of specific PAHs by understanding their detailed biochemical pathways, enzymatic system, and gene organization. Recent advancements in microbial genetic engineering and metabolomics using modern analytical tools have facilitated the bioremediation of such xenobiotics. This review explores the role of microbes, their biochemical pathways, genetic regulation of metabolic pathways, and the effect of biosurfactants against the backdrop of PAH substrate structures.
Keywords	bioremediation ; biosurfactants ; genes ; metabolomics ; technology ; xenobiotics
Language	English
Dates of publication	2022-01
Publishing place	Elsevier Ltd
Document type	Article
ZDB-ID	1065195-0
ISSN	1873-2976 ; 0960-8524
ISSN (online)	1873-2976
ISSN	0960-8524
DOI	10.1016/j.biortech.2021.126121
Database	NAL-Catalogue (AGRICOLA)

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Article: Low-temperature selective production of propylene from non-oxidative dehydrogenation of propane over unconventional Zr/ZK-5 catalysts

Agrawal, Ankit / Singh, Omvir / Abraham, B. Moses / Yenumala, Sudhakara Reddy / Ray, Anjan / Sarkar, Bipul

Fuel processing technology. 2022 Oct., v. 235

2022

Abstract: The supply-side abundance of inexpensive propane and ethane from shale gas and stranded gas are drivers for technologies for the on-demand production of light olefins, propylene and ethylene. However, existing catalysts exhibit relatively poor stability ... ...

Abstract	The supply-side abundance of inexpensive propane and ethane from shale gas and stranded gas are drivers for technologies for the on-demand production of light olefins, propylene and ethylene. However, existing catalysts exhibit relatively poor stability and deactivate rapidly at the high temperature required for dehydrogenation. This indicates an opportunity for new catalyst systems which can activate propane at a relatively lower temperature. Small pore zeolites, ZK-5 with improved acidity, notably monodispersed zirconia ZK-5 catalyst, are explored for low-temperature dehydrogenation of propane to propylene. Zeolite supports help to stabilise the metal particles and improve metal-support synergy. This paper demonstrates a Pt-free metal impregnated zeolite catalyst for propane dehydrogenation while maintaining good stability and activity. The Zr/ZK-5 catalyst exhibits 40.3% conversion with 45.2% propylene selectivity at 500 °C for 24 h. The combination of Zr and ZK-5 effectively activates the CH bond, inhibits side reactions, reduces coke formation, and improves selectivity as well as stability.
Keywords	acidity ; catalysts ; dehydrogenation ; ethane ; ethylene ; propane ; propylene ; shale gas ; temperature ; zeolites ; zirconium oxide
Language	English
Dates of publication	2022-10
Publishing place	Elsevier B.V.
Document type	Article
ZDB-ID	1483666-x
ISSN	0378-3820
ISSN	0378-3820
DOI	10.1016/j.fuproc.2022.107362
Database	NAL-Catalogue (AGRICOLA)

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Article: Process development for crystalline xylitol production from corncob biomass by Pichia caribbica

Dasgupta, Diptarka / Sidana, Arushdeep / Sarkar, Bipul / More, Snehal / Ghosh, Debashish / Bhaskar, Thallada / Ray, Anjan

Institution of Chemical Engineers Food and bioproducts processing. 2022 May, v. 133

2022

Abstract: Xylitol, a commodity chemical, is widely used in nutraceutical and pharmaceutical formulations. Microbial xylitol production is a promising alternative to mitigate current industrial practice issues and offers an environment-friendly sustainable ... ...

Abstract	Xylitol, a commodity chemical, is widely used in nutraceutical and pharmaceutical formulations. Microbial xylitol production is a promising alternative to mitigate current industrial practice issues and offers an environment-friendly sustainable conversion route. This study demonstrates a bioprocess for xylitol production from corncob using a mesophilic yeast Pichia caribbica. Corncob was hydrolyzed by dilute acid and steam explosion to recover fermentable xylose and used as the feed for xylitol production. Activated carbon treatment (3% w/v) completely removed the biomass-derived inhibitors furfural and hydroxymethyl furfural from the liquid hydrolysate. The fermenting yeast Pichia caribbica produced 124.1 ± 0.45 g/L xylitol from the detoxified and concentrated corncob hydrolysate with a high yield of 0.80 ± 0.02 g/g. The crystallized xylitol with 96.5% purity demonstrated no harmful effects on the cell line used as a control for the in-vitro toxicity studies. This proof of concept can be applied to help scale up for bio-refinery-based large-scale production of xylitol from corncob biomass.
Keywords	Meyerozyma caribbica ; activated carbon ; biobased products ; biomass ; bioprocessing ; cell lines ; corn cobs ; crystallization ; dietary supplements ; furfural ; hydrolysates ; hydroxymethylfurfural ; liquids ; toxicity ; xylitol ; xylose ; yeasts
Language	English
Dates of publication	2022-05
Size	p. 45-56.
Publishing place	Elsevier Ltd
Document type	Article
ZDB-ID	2008001-3
ISSN	0960-3085
ISSN	0960-3085
DOI	10.1016/j.fbp.2022.02.006
Database	NAL-Catalogue (AGRICOLA)

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