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Article: Removal of Brilliant Green dye from water by modified Bambusa Tulda: adsorption isotherm, kinetics and thermodynamics study

Laskar, N / Kumar, U

International journal of environmental science and technology. 2019 Mar., v. 16, no. 3

2019

Abstract: The present research is based on the removal of Brilliant Green dye from synthetic wastewater which is one of the emerging hazardous contaminant. Adsorption technology was used to remove Brilliant Green dye using sodium carbonate-treated Bambusa Tulda as ...

Abstract	The present research is based on the removal of Brilliant Green dye from synthetic wastewater which is one of the emerging hazardous contaminant. Adsorption technology was used to remove Brilliant Green dye using sodium carbonate-treated Bambusa Tulda as bio-adsorbent to replace costly activated carbon. Initial experiment shows the best removal of Brilliant Green dye done by sodium carbonate-treated Bambusa Tulda as compared to hydrochloric acid-treated Bambusa Tulda and distilled washed Bambusa Tulda. Scanning electron microscope, Fourier transform infrared spectroscopy and energy diffractions and X-ray analysis were done to identify functional group, surface characteristic and elemental constituents of sodium carbonate-treated Bambusa Tulda. The adsorption parameters have direct influence onto sodium carbonate-treated Bambusa Tulda for Brilliant Green dye removal. Optimum removal (98%) of dye was obtained at equilibrium time 60 min at pH 7, adsorbent dose 10 g/l, rotation per minute 200 and 298 K. Experimental data were fitted into four isotherm models and Langmuir isotherm best fitted with maximum adsorption capacity = 41.67 mg/g. Kinetics rate data fit better in pseudo-second-order model. Activation energy was observed as 16.802 kJ/mole, and the adsorption was diffusion control process. The chemical oxygen demand values of Brilliant Green dye decreased from 136 to 72 mg/l after the adsorption of Brilliant Green with sodium carbonate-treated Bambusa Tulda. Thus, it can be concluded that sodium carbonate-treated Bambusa Tulda is an efficient adsorbent and an alternative to activated carbon for the removal of Brilliant Green dye from synthetic wastewater.
Keywords	activated carbon ; activation energy ; adsorbents ; adsorption ; Bambusa tulda ; chemical oxygen demand ; dyes ; energy ; Fourier transform infrared spectroscopy ; models ; moieties ; pH ; scanning electron microscopes ; sorption isotherms ; wastewater ; X-radiation
Language	English
Dates of publication	2019-03
Size	p. 1649-1662.
Publishing place	Springer Berlin Heidelberg
Document type	Article
ZDB-ID	2230399-6
ISSN	1735-2630 ; 1735-1472
ISSN (online)	1735-2630
ISSN	1735-1472
DOI	10.1007/s13762-018-1760-5
Database	NAL-Catalogue (AGRICOLA)

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Article ; Online: Comparison of the Recent Updates to the ACC/AHA and ESC Guidelines for the Management of Valvular Heart Disease: Similarities and Differences.

Laskar, Nabila / Badiani, Sveeta / Treibel, Thomas / Bhattacharyya, Sanjeev / Lloyd, Guy

Current cardiology reports

2023 Volume 25, Issue 3, Page(s) 147–156

Abstract: Purpose of review: There have been several advances in the diagnosis and management of valvular heart disease (VHD) over the last decade. These have been reflected in the latest European and North American guidelines, although both contain significant ... ...

Abstract	Purpose of review: There have been several advances in the diagnosis and management of valvular heart disease (VHD) over the last decade. These have been reflected in the latest European and North American guidelines, although both contain significant similarities and differences. In this review, we highlight the important overlaps and variations between the updated guidelines and their previous versions to help guide the general cardiologist. Recent findings: There has been extensive revision on the use of percutaneous treatments, the indications for intervention in asymptomatic VHD, and perioperative bridging therapies. The updated guidelines provide new recommendations in many aspects of VHD; however, there remain significant gaps in the role of biomarkers in VHD and the long-term outcomes of novel oral anticoagulants (NOACs) and transcatheter therapies.
MeSH term(s)	Humans ; Administration, Oral ; Anticoagulants/therapeutic use ; Heart Valve Diseases/diagnosis ; Heart Valve Diseases/drug therapy ; Cardiologists
Chemical Substances	Anticoagulants
Language	English
Publishing date	2023-01-28
Publishing country	United States
Document type	Journal Article ; Review
ZDB-ID	2055373-0
ISSN	1534-3170 ; 1523-3782
ISSN (online)	1534-3170
ISSN	1523-3782
DOI	10.1007/s11886-023-01840-7
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Article: Evaluation of extracellular matrix changes among oral submucous fibrosis and oral squamous cell carcinoma patients of Malwa region of Punjab using special histochemical stains: An insight into cancerous transformation.

Gandhi, Piyush / Singh, Harkanwal P / Thippeswamy, Halappa S / Sodhi, Surinder P S / Kaur, Mandeep / Laskar, Neha

Journal of oral and maxillofacial pathology : JOMFP

2023 Volume 27, Issue 3, Page(s) 600

Abstract: Background: To assess extracellular matrix changes among oral submucous fibrosis (OSMF) and oral squamous cell carcinoma (OSCC) patients using special histochemical stains.: Materials and methods: Twenty biopsy specimens of OSMF and 30 biopsy ... ...

Abstract	Background: To assess extracellular matrix changes among oral submucous fibrosis (OSMF) and oral squamous cell carcinoma (OSCC) patients using special histochemical stains. Materials and methods: Twenty biopsy specimens of OSMF and 30 biopsy specimens of OSCC were included in the present study. Among 20 OSMF specimens, 10 were of early OSMF and the remaining 10 were of advanced OSMF. Out of 30 OSCC specimens, 10 cases each were of well-differentiated OSCC, moderately differentiated OSCC and poorly differentiated OSCC. Three sections, each 4 μm thick, were obtained from all specimens. One section was stained with routine H&E staining, whereas the other section was stained with Masson's trichrome (MT) stain for collagen and Verhoeff-Van Gieson (VVG) for elastic fibres. Evaluation of all specimens was performed under the light microscope. The arrangement of collagen fibres and elastic fibres was compared between the OSMF group and OSCC group, in between different grades of OSMF and in between different grades of OSCC. The results were evaluated using SPSS software. Results: Early OSMF cases were associated with fibrosis in the superficial lamina propria, whereas advanced OSMF had fibrosis involving deeper muscle fibres. In all early OSMF cases, elastic fibres were arranged in thin bundles, whereas in advanced OSMF cases, elastic fibres were in thick bundles. In well- and moderately differentiated OSCCs, the collagen fibres were arranged in thick bundles and in poorly-differentiated OSCCs, the collagen fibres appeared to be fragmented. The elastic fibres in well-differentiated OSCC and moderately-differentiated OSCC were thickly arranged, and poorly-differentiated OSCC showed thin fibres and 70% of cases showed the absence of elastic fibres. Conclusion: Changes observed in both collagen and elastic fibres in the extracellular matrix (ECM) can be taken as a study model to further understand the progression of OSMF to OSCC using histochemical stains.
Language	English
Publishing date	2023-09-12
Publishing country	India
Document type	Journal Article
ZDB-ID	2390999-7
ISSN	1998-393X ; 0973-029X
ISSN (online)	1998-393X
ISSN	0973-029X
DOI	10.4103/jomfp.jomfp_24_23
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Article: Plastics and microplastics: A threat to environment

Laskar, Nirban / Upendra Kumar

Environmental technology & innovation. 2019 May, v. 14

2019

Abstract: Plastics are synthetic polymer compound mostly made from petrochemical sources, such compound has high molecular mass and plasticity and certain chemicals are added to increase the performance and efficiency of the products. Plastics size less than 5 mm ... ...

Abstract	Plastics are synthetic polymer compound mostly made from petrochemical sources, such compound has high molecular mass and plasticity and certain chemicals are added to increase the performance and efficiency of the products. Plastics size less than 5 mm are categorized as Microplastics and it is one of the greatest potential threat to marine environment for the whole world. There are two types of micro-plastics i.e. primary micro-plastics and secondary micro-plastics. Primary microplastics are the by-products of particulate emissions released from industrial production, the release of plastics dust from plastics products. Secondary microplastics are larger plastic particulate material. These micro-plastics eventually end up in water bodies travelling all the way from rivers to seas or oceans. Microplastic can also act as a pollutant transport medium for other toxic elements such as DDT and hexachlorobenzene and eventually end up within the body of a living organism who consume it. The Government Agencies and Non-government organization of different nations have adopted many policies and laws to curb the harmful effects of plastics and microplastics. A concrete and comprehensive plan should be adopted for zero tolerance against plastics waste and peoples participation is a must to achieve the full success.
Keywords	DDT (pesticide) ; byproducts ; concrete ; dust ; government agencies ; hexachlorobenzene ; issues and policy ; marine environment ; microplastics ; molecular weight ; oceans ; particulate emissions ; plasticity ; pollutants ; rivers ; surface water ; toxic substances ; wastes ; zero tolerance
Language	English
Dates of publication	2019-05
Size	p. 100352.
Publishing place	Elsevier B.V.
Document type	Article
ISSN	2352-1864
DOI	10.1016/j.eti.2019.100352
Database	NAL-Catalogue (AGRICOLA)

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Article: Foraging activity of Apis mellifera Linn. on litchi in the Terai zone of West Bengal

Nath, Riju / Saha, Samrat / Laskar, Nripendra / Debnath, Manoj Kanti

Journal of entomological research

2023 Volume 47, Issue 1, Page(s) 174

Document type	Article
ZDB-ID	446197-6
ISSN	0378-9519
Database	Current Contents Nutrition, Environment, Agriculture

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Article ; Online: Spring water quality and assessment of associated health risks around the urban Tuirial landfill site in Aizawl, Mizoram, India

Laskar, Nirban / Singh, Utkarsh / Kumar, Rajesh / Meena, Sonu Kumar

Groundwater for Sustainable Development. 2022 May, v. 17 p.100726-

2022

Abstract: Water is an essential and integral part of living; it provides recreation and livelihood for thousands of living beings. Water bodies include rivers, lakes, groundwater, oceans, and mountain spring water plays a dynamic role in India's most hilly regions, ...

Abstract	Water is an essential and integral part of living; it provides recreation and livelihood for thousands of living beings. Water bodies include rivers, lakes, groundwater, oceans, and mountain spring water plays a dynamic role in India's most hilly regions, including the Mizoram of India. Water quality includes all the physical, chemical, and biological characteristics of water. Access to safe water is vital for health, livelihoods, security, and quality of life—the study area is located around 25 km from Aizawl city, Mizoram. Landfill receives waste from Aizawl city in vast quantities. There is no proper arrangement to secure the stream, which is just near the dumping ground, due to which spring water is getting affected by toxic substances. The TDS value was found to be between 670 and 690 mg/L, Dissolved Oxygen (DO) in the range of 2–5.2 mg/L, chloride level between 263.3 and 268.2 mg/L, calcium 109.6–113.6 mg/L, hardness in the range of 326–340 mg/L, conductivity higher than 1000 US/cm, ammonia in between 0.165 and 0.849 mg/L in the three sample sites. A reduced amount of dissolved oxygen affects the self-purification of spring, which leads to deteriorating the condition of the water quality. Water quality is dependent on the type of pollutant added and the nature of the self-purification of water. WQI at 215.52 suggests that water is not suitable for drinking.
Keywords	ammonia ; calcium ; chlorides ; dissolved oxygen ; groundwater ; hardness ; landfills ; livelihood ; pollutants ; recreation ; spring ; streams ; sustainable development ; toxicity ; wastes ; water quality ; India ; Landfills contaminants ; Landfill leachate ; Water quality analysis ; Urban groundwater
Language	English
Dates of publication	2022-05
Publishing place	Elsevier B.V.
Document type	Article ; Online
ISSN	2352-801X
DOI	10.1016/j.gsd.2022.100726
Database	NAL-Catalogue (AGRICOLA)

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Article ; Online: The Use of Prophylactic Somatostatin Therapy Following Pancreaticoduodenectomy: A Meta-analysis of Randomised Controlled Trials.

Adiamah, A / Arif, Z / Berti, F / Singh, S / Laskar, N / Gomez, D

World journal of surgery

2019 Volume 43, Issue 7, Page(s) 1788–1801

Abstract: Background: Prophylactic administration of somatostatin analogues (SA) to reduce the incidence of post-operative pancreatic fistula (POPF) remains contentious. This meta-analysis evaluated its impact on outcomes following pancreaticoduodenectomy (PD).!## ...

Abstract	Background: Prophylactic administration of somatostatin analogues (SA) to reduce the incidence of post-operative pancreatic fistula (POPF) remains contentious. This meta-analysis evaluated its impact on outcomes following pancreaticoduodenectomy (PD). Methods: The EMBASE, MEDLINE and Cochrane databases were searched for randomised controlled trials (RCTs) investigating prophylactic SA following PD. Comparative effects were summarised as odds ratio and weighted mean difference based on an intention to treat. Quantitative pooling of the effect sizes was derived using the random-effects model. Main results: Twelve RCTs were included involving 1615 patients [SA-treated group (n = 820) and control group (n = 795)]. The SA used included somatostatin-14, pasireotide, vapreotide and octreotide. Pooling of the data showed no significant benefit of its use for the primary outcome measure of all grades of POPF, odds ratio (OR) 0.73 [95% confidence interval (CI), 0.51-1.05, p = 0.09] and clinically relevant POPF, OR 0.48 [95% CI, 0.22-1.06, p = 0.07]. There were no benefits in the secondary outcome measures of delayed gastric emptying, OR 0.98 [95% CI, 0.57-1.69, p = 0.94]; infected abdominal collections, OR 0.80 [95% CI, 0.44-1.43, p = 0.80]; reoperation rates, OR 1.24 [95% CI, 0.73-2.13, p = 0.42]; duration of hospital stay, - 0.23 [95% CI - .59 to 1.13, p = 0.74]; and mortality, 1.78 [95% CI, 0.94-3.39, p = 0.08]. Conclusion: SA did not improve the post-operative outcomes following PD, including reducing the incidence of POPF. The routine administration of SA cannot be recommended following PD.
MeSH term(s)	Antineoplastic Agents, Hormonal/therapeutic use ; Gastroparesis/etiology ; Humans ; Length of Stay/statistics & numerical data ; Octreotide/therapeutic use ; Pancreatic Fistula/etiology ; Pancreatic Fistula/prevention & control ; Pancreaticoduodenectomy/adverse effects ; Postoperative Complications/etiology ; Postoperative Complications/prevention & control ; Randomized Controlled Trials as Topic ; Reoperation/statistics & numerical data ; Somatostatin/analogs & derivatives ; Somatostatin/therapeutic use
Chemical Substances	Antineoplastic Agents, Hormonal ; vapreotide (2PK59M9GFF) ; Somatostatin (51110-01-1) ; pasireotide (98H1T17066) ; Octreotide (RWM8CCW8GP)
Language	English
Publishing date	2019-02-23
Publishing country	United States
Document type	Journal Article ; Meta-Analysis ; Research Support, Non-U.S. Gov't ; Systematic Review
ZDB-ID	224043-9
ISSN	1432-2323 ; 0364-2313
ISSN (online)	1432-2323
ISSN	0364-2313
DOI	10.1007/s00268-019-04956-6
Database	MEDical Literature Analysis and Retrieval System OnLINE

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Article: Corporate sustainability performance and firm performance

Laskar, Najul / Santi Gopal Maji

International journal of corporate strategy and social responsibility Vol. 1, No. 2 , p. 118-140

evidence from India and South Korea

2017 Volume 1, Issue 2, Page(s) 118–140

Author's details	Najul Laskar and Santi Gopal Maji
Keywords	content analysis ; corporate sustainability performance ; CSP ; firm performance ; Global Reporting Initiatives ; India ; South Korea
Language	English
Publisher	Inderscience Enterprises Ltd
Publishing place	[Olney, Bucks.]
Document type	Article
ZDB-ID	2905095-9
ISSN	2054-8079
Database	ECONomics Information System

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Article ; Online: Antithrombotic therapy after heart valve surgery, contemporary practice in the United Kingdom.

Laskar, Nabila / Bayliss, Christopher D / Kirmani, Bilal H / Chambers, John B / Maier, Rebecca / Briffa, Norman P / Cartwright, Neil / Kendall, Simon / Shah, Benoy Nalin / Akowuah, Enoch

Interdisciplinary cardiovascular and thoracic surgery

2024

Abstract: Objectives: There is a lack of high-quality data informing the optimal antithrombotic drug strategy following bioprosthetic heart valve replacement or valve repair. Disparity in recommendations from international guidelines reflects this. This study ... ...

Abstract	Objectives: There is a lack of high-quality data informing the optimal antithrombotic drug strategy following bioprosthetic heart valve replacement or valve repair. Disparity in recommendations from international guidelines reflects this. This study aimed to document current patterns of antithrombotic prescribing after heart valve surgery in the UK. Methods: All UK consultant cardiac surgeons were e-mailed a custom-designed survey. The use of oral anticoagulant (OAC) and/or antiplatelet drugs following bioprosthetic aortic (AVR) or mitral valve replacement (MVR), or mitral valve repair (MVrep), for patients in sinus rhythm, without additional indications for antithrombotic medication, was assessed. Additionally, we evaluated anticoagulant choice following MVrep in patients with atrial fibrillation (AF). Results: We identified 260 UK consultant cardiac surgeons from 36 units, of whom 103 (40%) responded, with 33 units (92%) having at least one respondent. The greatest consensus was for patients undergoing bioprosthetic AVR, in which 76% of surgeons favour initial antiplatelet therapy and 53% prescribe lifelong treatment. Only 8% recommend initial OAC. After bioprosthetic MVR, 48% of surgeons use an initial OAC strategy (versus 42% antiplatelet), with 66% subsequently prescribing lifelong antiplatelet therapy. After MVrep, recommendations were lifelong antiplatelet agent alone (34%) or following 3 months OAC (20%), no antithrombotic agent (20%), or 3 months OAC (16%). After MVrep for patients with established AF, surgeons recommend warfarin (38%), a direct oral anticoagulant (37%) or have no preference between the two (25%). Conclusions: There is considerable variation in the use of antithrombotic drugs after heart valve surgery in the UK and a lack of high-quality evidence to guide practice, underscoring the need for randomized studies.
Language	English
Publishing date	2024-05-04
Publishing country	England
Document type	Journal Article
ISSN	2753-670X
ISSN (online)	2753-670X
DOI	10.1093/icvts/ivae089
Database	MEDical Literature Analysis and Retrieval System OnLINE

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Article: Disclosure of corporate social responsibility and firm performance

Laskar, Najul / Santi Gopal Maji / Haque, Moon Moon

Asia-Pacific journal of management research and innovation : APJMRI Vol. 12, No. 2 , p. 145-154

evidence from India

2016 Volume 12, Issue 2, Page(s) 145–154

Author's details	Najul Laskar, Santi G. Maji
Keywords	Corporate social responsibility ; GRI framework ; disclosure score ; firm performance ; India
Language	English
Publisher	Sage
Publishing place	Los Angeles [u.a.]
Document type	Article
ZDB-ID	2838029-0 ; 2694545-9
ISSN	2321-0729 ; 2319-510X
ISSN (online)	2321-0729
ISSN	2319-510X
Database	ECONomics Information System

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