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Article ; Online: Reply to the Letter to the Editors regarding COVID-19 infection and placental histopathology in women delivering at term.

Patberg, Elizabeth T / Vintzileos, Anthony M / Khullar, Poonam

American journal of obstetrics and gynecology

2021 Volume 225, Issue 3, Page(s) 354

MeSH term(s)	COVID-19 ; Female ; Humans ; Infectious Disease Transmission, Vertical ; Placenta ; Pregnancy ; Pregnancy Complications, Infectious ; SARS-CoV-2
Language	English
Publishing date	2021-05-29
Publishing country	United States
Document type	Letter ; Comment
ZDB-ID	80016-8
ISSN	1097-6868 ; 0002-9378
ISSN (online)	1097-6868
ISSN	0002-9378
DOI	10.1016/j.ajog.2021.05.037
Database	MEDical Literature Analysis and Retrieval System OnLINE

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Article: Hemolytic Response of Iron Oxide Magnetic Nanoparticles at the Interface and in Bulk: Extraction of Blood Cells by Magnetic Nanoparticles

Agarwal, Vandana / Gupta, Vikas / Bhardwaj, Vimal Kumar / Singh, Kultar / Khullar, Poonam / Bakshi, Mandeep Singh

ACS applied materials & interfaces. 2022 Jan. 29, v. 14, no. 5

2022

Abstract: Surface-active and water-soluble magnetic nanoparticles (NPs) were synthesized in the presence of a series of amphiphilic molecules of different functional groups to determine the hemolytic response and their ability to extract blood cells across the ... ...

Abstract	Surface-active and water-soluble magnetic nanoparticles (NPs) were synthesized in the presence of a series of amphiphilic molecules of different functional groups to determine the hemolytic response and their ability to extract blood cells across the interface and aqueous bulk while maintaining minimum hemolysis. Amphiphilic molecules such as Gemini surfactants of strong hydrophobicity and low hydrophilic–lipophilic balance produced surface-active magnetic NPs, which were highly cytotoxic even when placed at the blood suspension (aqueous)–air interface. A similar behavior was shown by water-soluble magnetic NPs produced using monomeric ionic and nonionic surfactants and different amino acids. The NPs produced using mild biological surfactants and mono- and oligosaccharides of the same functional group proved to be excellent blood cell extractors with minimum hemolysis. α/β-cyclodextrin and dextrose-stabilized magnetic NPs induced negligible hemolysis and extracted more than 50% of blood cells. The results showed that nontoxic magnetic NPs are excellent blood cell extractors from the blood suspension when tagged with amphiphilic molecules possessing good biocompatibility with cell membranes without inducing hemolysis. The work highlights the biological applicability of nontoxic magnetic NPs at biointerfaces and in blood suspensions.
Keywords	biocompatibility ; cytotoxicity ; hemolysis ; hydrophobicity ; iron oxides ; magnetism ; oligosaccharides ; water solubility
Language	English
Dates of publication	2022-0129
Size	p. 6428-6441.
Publishing place	American Chemical Society
Document type	Article
ISSN	1944-8252
DOI	10.1021/acsami.1c23496
Database	NAL-Catalogue (AGRICOLA)

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Article: Ag and Au Nanoparticles as Color Indicators for Monomer/Micelle–Nanoparticle Interactions

Kaur, Prabhjot / Rajput, Jaspreet Kaur / Singh, Kultar / Khullar, Poonam / Bakshi, Mandeep Singh

Langmuir. 2022 June 16, v. 38, no. 25

2022

Abstract: Ag and Au nanoparticles (NPs) were used as color indicators to determine the monomer/micelle adsorption on the NP surface. A simple methodology based on the color change of Ag/Au NPs upon interacting with surface-active molecules was developed. A ... ...

Abstract	Ag and Au nanoparticles (NPs) were used as color indicators to determine the monomer/micelle adsorption on the NP surface. A simple methodology based on the color change of Ag/Au NPs upon interacting with surface-active molecules was developed. A contrasting color change occurred when NPs interact with the monomer/micelle. This was demonstrated by monitoring the adsorption behavior of a series of Gemini surfactants. UV–visible measurements showed a large change in the intensity and wavelength of Ag/Au NP absorbance upon the surface adsorption of the monomer/micelle of Gemini surfactants. The mechanism of surface adsorption and molecular orientation on the solid–liquid interface of NPs was determined by performing the FT-IR and XPS measurements. Results demonstrated that sharp color changes from yellow to red for Ag NPs and red to purple for Au NPs happened when the Gemini surfactant monomer/micelle adsorbs on the NP surface. This colorimeter-based methodology highlighted the applicability of Ag/Au NPs in complex media where such NPs frequently encounter surface-active molecules.
Keywords	absorbance ; adsorption ; color ; liquid-solid interface ; micelles ; nanogold ; surfactants ; wavelengths
Language	English
Dates of publication	2022-0616
Size	p. 7802-7814.
Publishing place	American Chemical Society
Document type	Article
ZDB-ID	2005937-1
ISSN	1520-5827 ; 0743-7463
ISSN (online)	1520-5827
ISSN	0743-7463
DOI	10.1021/acs.langmuir.2c00853
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Article ; Online: Extraction of Bionanomaterials from the Aqueous Bulk by Using Surface Active and Water-Soluble Magnetic Nanoparticles.

Kaur, Rajpreet / Khullar, Poonam / Gupta, Anita / Bakshi, Mandeep Singh

Langmuir : the ACS journal of surfaces and colloids

2021 Volume 37, Issue 49, Page(s) 14558–14570

Abstract: Surface active and water-soluble magnetic nanoparticles (NPs) were used to demonstrate the extraction of bionanomaterials from the aqueous bulk. Au NPs conjugated with different water-insoluble and water-soluble proteins were used as model ... ...

Abstract	Surface active and water-soluble magnetic nanoparticles (NPs) were used to demonstrate the extraction of bionanomaterials from the aqueous bulk. Au NPs conjugated with different water-insoluble and water-soluble proteins were used as model bionanomaterials. UV-visible studies, zeta potential, and microscopic analyses were performed to quantify the extraction. Sodium dodecyl sulfate and dimethylene bis(dodecyldimethylammonium bromide) (12-2-12) stabilized surface active magnetic NPs were fully capable of extracting Au NPs conjugated with predominantly hydrophobic proteins from the aqueous bulk when placed at the aqueous-air interface. However, they were poor in extracting Au NPs from the aqueous bulk which were coated with predominantly hydrophilic water-soluble protein. On the other hand, water-soluble dodecyldimethyl-3-ammonio-1-propanesulfonate stabilized magnetic NPs proved to be fully capable of extracting all kinds of Au NPs conjugated with either water-soluble or water-insoluble proteins. The results highlight the remarkable ability of magnetic NPs in the extraction of bionanomaterials when placed at either biointerfaces or in the aqueous bulk of biological systems.
MeSH term(s)	Gold ; Hydrophobic and Hydrophilic Interactions ; Magnetite Nanoparticles ; Water
Chemical Substances	Magnetite Nanoparticles ; Water (059QF0KO0R) ; Gold (7440-57-5)
Language	English
Publishing date	2021-12-05
Publishing country	United States
Document type	Journal Article ; Research Support, Non-U.S. Gov't
ZDB-ID	2005937-1
ISSN	1520-5827 ; 0743-7463
ISSN (online)	1520-5827
ISSN	0743-7463
DOI	10.1021/acs.langmuir.1c03074
Database	MEDical Literature Analysis and Retrieval System OnLINE

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Article ; Online: Ag and Au Nanoparticles as Color Indicators for Monomer/Micelle-Nanoparticle Interactions.

Kaur, Prabhjot / Rajput, Jaspreet Kaur / Singh, Kultar / Khullar, Poonam / Bakshi, Mandeep Singh

Langmuir : the ACS journal of surfaces and colloids

2022 Volume 38, Issue 25, Page(s) 7802–7814

Abstract	Ag and Au nanoparticles (NPs) were used as color indicators to determine the monomer/micelle adsorption on the NP surface. A simple methodology based on the color change of Ag/Au NPs upon interacting with surface-active molecules was developed. A contrasting color change occurred when NPs interact with the monomer/micelle. This was demonstrated by monitoring the adsorption behavior of a series of Gemini surfactants. UV-visible measurements showed a large change in the intensity and wavelength of Ag/Au NP absorbance upon the surface adsorption of the monomer/micelle of Gemini surfactants. The mechanism of surface adsorption and molecular orientation on the solid-liquid interface of NPs was determined by performing the FT-IR and XPS measurements. Results demonstrated that sharp color changes from yellow to red for Ag NPs and red to purple for Au NPs happened when the Gemini surfactant monomer/micelle adsorbs on the NP surface. This colorimeter-based methodology highlighted the applicability of Ag/Au NPs in complex media where such NPs frequently encounter surface-active molecules.
Language	English
Publishing date	2022-06-16
Publishing country	United States
Document type	Journal Article
ZDB-ID	2005937-1
ISSN	1520-5827 ; 0743-7463
ISSN (online)	1520-5827
ISSN	0743-7463
DOI	10.1021/acs.langmuir.2c00853
Database	MEDical Literature Analysis and Retrieval System OnLINE

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Article ; Online: Hemolytic Response of Iron Oxide Magnetic Nanoparticles at the Interface and in Bulk: Extraction of Blood Cells by Magnetic Nanoparticles.

Agarwal, Vandana / Gupta, Vikas / Bhardwaj, Vimal Kumar / Singh, Kultar / Khullar, Poonam / Bakshi, Mandeep Singh

ACS applied materials & interfaces

2022 Volume 14, Issue 5, Page(s) 6428–6441

Abstract	Surface-active and water-soluble magnetic nanoparticles (NPs) were synthesized in the presence of a series of amphiphilic molecules of different functional groups to determine the hemolytic response and their ability to extract blood cells across the interface and aqueous bulk while maintaining minimum hemolysis. Amphiphilic molecules such as Gemini surfactants of strong hydrophobicity and low hydrophilic-lipophilic balance produced surface-active magnetic NPs, which were highly cytotoxic even when placed at the blood suspension (aqueous)-air interface. A similar behavior was shown by water-soluble magnetic NPs produced using monomeric ionic and nonionic surfactants and different amino acids. The NPs produced using mild biological surfactants and mono- and oligosaccharides of the same functional group proved to be excellent blood cell extractors with minimum hemolysis. α/β-cyclodextrin and dextrose-stabilized magnetic NPs induced negligible hemolysis and extracted more than 50% of blood cells. The results showed that nontoxic magnetic NPs are excellent blood cell extractors from the blood suspension when tagged with amphiphilic molecules possessing good biocompatibility with cell membranes without inducing hemolysis. The work highlights the biological applicability of nontoxic magnetic NPs at biointerfaces and in blood suspensions.
MeSH term(s)	Biocompatible Materials/chemistry ; Biocompatible Materials/pharmacology ; Cell Membrane/drug effects ; Cell Membrane/metabolism ; Cyclodextrins/chemistry ; Erythrocytes/cytology ; Erythrocytes/drug effects ; Erythrocytes/metabolism ; Ferric Compounds/chemistry ; Glucose/chemistry ; Hemolysis/drug effects ; Humans ; Hydrophobic and Hydrophilic Interactions ; Magnetite Nanoparticles/chemistry ; Magnetite Nanoparticles/toxicity ; Water/chemistry
Chemical Substances	Biocompatible Materials ; Cyclodextrins ; Ferric Compounds ; Magnetite Nanoparticles ; Water (059QF0KO0R) ; ferric oxide (1K09F3G675) ; Glucose (IY9XDZ35W2)
Language	English
Publishing date	2022-01-28
Publishing country	United States
Document type	Journal Article
ISSN	1944-8252
ISSN (online)	1944-8252
DOI	10.1021/acsami.1c23496
Database	MEDical Literature Analysis and Retrieval System OnLINE

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Article: Extraction of Bionanomaterials from the Aqueous Bulk by Using Surface Active and Water-Soluble Magnetic Nanoparticles

Kaur, Rajpreet / Khullar, Poonam / Gupta, Anita / Bakshi, Mandeep Singh

Langmuir. 2021 Dec. 05, v. 37, no. 49

2021

Abstract	Surface active and water-soluble magnetic nanoparticles (NPs) were used to demonstrate the extraction of bionanomaterials from the aqueous bulk. Au NPs conjugated with different water-insoluble and water-soluble proteins were used as model bionanomaterials. UV–visible studies, zeta potential, and microscopic analyses were performed to quantify the extraction. Sodium dodecyl sulfate and dimethylene bis(dodecyldimethylammonium bromide) (12-2-12) stabilized surface active magnetic NPs were fully capable of extracting Au NPs conjugated with predominantly hydrophobic proteins from the aqueous bulk when placed at the aqueous–air interface. However, they were poor in extracting Au NPs from the aqueous bulk which were coated with predominantly hydrophilic water-soluble protein. On the other hand, water-soluble dodecyldimethyl-3-ammonio-1-propanesulfonate stabilized magnetic NPs proved to be fully capable of extracting all kinds of Au NPs conjugated with either water-soluble or water-insoluble proteins. The results highlight the remarkable ability of magnetic NPs in the extraction of bionanomaterials when placed at either biointerfaces or in the aqueous bulk of biological systems.
Keywords	hydrophilicity ; hydrophobicity ; magnetism ; sodium dodecyl sulfate ; water solubility ; zeta potential
Language	English
Dates of publication	2021-1205
Size	p. 14558-14570.
Publishing place	American Chemical Society
Document type	Article
ZDB-ID	2005937-1
ISSN	1520-5827 ; 0743-7463
ISSN (online)	1520-5827
ISSN	0743-7463
DOI	10.1021/acs.langmuir.1c03074
Database	NAL-Catalogue (AGRICOLA)

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Article: Avoiding Hemolytic Anemia by Understanding the Effect of the Molecular Architecture of Gemini Surfactants on Hemolysis

Agarwal, Vandana / Gupta, Vikas / Bhardwaj, Vimal Kumar / Singh, Kultar / Khullar, Poonam / Bakshi, Mandeep Singh

Langmuir. 2021 Mar. 18, v. 37, no. 12

2021

Abstract: Hemolytic behavior of a series of different categories of Gemini surfactants was determined in their low concentration range. Cationic Gemini surfactants of different molecular architectures prove to be highly cytotoxic even at 0.1 mM. Anionic and amino ... ...

Abstract	Hemolytic behavior of a series of different categories of Gemini surfactants was determined in their low concentration range. Cationic Gemini surfactants of different molecular architectures prove to be highly cytotoxic even at 0.1 mM. Anionic and amino acid-based Gemini surfactants were minimally cytotoxic, although their toxicity was concentration-dependent. With respect to monomeric surfactants of comparable hydrocarbon chain lengths, cationic Gemini surfactants were much more toxic than anionic Gemini surfactants. Incubation temperature was another important parameter that significantly drove the hemolysis irrespective of the molecular structure of the surfactant. Results indicated that the surface activity or liquid–blood cell membrane adsorption tendency of a surfactant molecule determined the degree of hemolytic anemia. Greater surface activity induced greater cytotoxicity, especially when the surfactant possessed a stronger ability to interact with the membrane proteins through hydrophilic interactions. That provided cationic Gemini surfactants a higher ability for hemolytic anemia because they were able to interact with an electronegative cell membrane with favorable interactions in comparison to anionic or amino acid-based Gemini surfactants. These findings are expected to help in designing surface-active drugs with a suitable molecular architecture that can avoid hemolytic anemia.
Keywords	adsorption ; cell membranes ; chemical structure ; cytotoxicity ; hemolysis ; hemolytic anemia ; hydrophilicity ; surfactants ; temperature
Language	English
Dates of publication	2021-0318
Size	p. 3709-3720.
Publishing place	American Chemical Society
Document type	Article
Note	NAL-AP-2-clean
ZDB-ID	2005937-1
ISSN	1520-5827 ; 0743-7463
ISSN (online)	1520-5827
ISSN	0743-7463
DOI	10.1021/acs.langmuir.1c00154
Database	NAL-Catalogue (AGRICOLA)

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Article: Biodiesel as a non-aqueous medium for the synthesis of nanomaterials: relevance to metallic particulate suspensions in biofuels and their removal

Kaur, Rajpreet / Khullar, Poonam / Gupta, Anita / Ahluwalia, Gurinder Kaur / Bakshi, Mandeep Singh

Biofuels. 2021 Oct. 21, v. 12, no. 9

2021

Abstract: In relevance to materials chemistry, this study presents biodiesel as an important non-aqueous medium for the synthesis of nanomaterials by demonstrating the synthesis of most versatile gold (Au) and silver (Ag) nanoparticles (NPs) in biodiesel medium. ... ...

Abstract	In relevance to materials chemistry, this study presents biodiesel as an important non-aqueous medium for the synthesis of nanomaterials by demonstrating the synthesis of most versatile gold (Au) and silver (Ag) nanoparticles (NPs) in biodiesel medium. We show single-step in situ synthesis of Au and Ag NPs using biodiesels prepared from soybean and olive oil. Both biodiesels proved to be excellent solvents, reducing agents, and stabilizing agents for Au and Ag NPs. Au and Ag NPs were characterized by transmission electron microscope and XRD analyses, and were within the range of ∼10–50 nm. Colloidal stabilization of NPs by the surface adsorption of biodiesel was evaluated by detailed FT-IR analysis and determined to be driven by the ester head group of biodiesel molecules. Biodiesel-stabilized NPs in aqueous phase were efficiently extracted in the organic phase without using any phase transfer agent, suggesting the applicability of biodiesel in entrapping metal particulates and removing them from the aqueous phase with relevance to environmental sustainability.
Keywords	adsorption ; biodiesel ; environmental sustainability ; gold ; olive oil ; particulates ; silver ; soybeans ; transmission electron microscopes
Language	English
Dates of publication	2021-1021
Size	p. 1141-1148.
Publishing place	Taylor & Francis
Document type	Article
ISSN	1759-7277
DOI	10.1080/17597269.2019.1594593
Database	NAL-Catalogue (AGRICOLA)

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Article ; Online: Colloidal Stabilization of Sodium Dilauraminocystine for Selective Nanoparticle-Nanoparticle Interactions: Their Screening and Extraction by Iron Oxide Magnetic Nanoparticles.

Kaur, Amandeep / Sandhu, Ravneet Kaur / Khullar, Poonam / Singh, Kultar / Ahluwalia, Gurinder Kaur / Bakshi, Mandeep Singh

Langmuir : the ACS journal of surfaces and colloids

2021 Volume 37, Issue 21, Page(s) 6588–6599

Abstract: Nanoparticle-nanoparticle (NP-NP) interactions between Au and Ag NPs were studied by using sodium dilauraminocystine (SDLC)- and Gemini surfactant-stabilized NPs to demonstrate the unique NP surface adsorption behavior of SDLC in controlling and ... ...

Abstract	Nanoparticle-nanoparticle (NP-NP) interactions between Au and Ag NPs were studied by using sodium dilauraminocystine (SDLC)- and Gemini surfactant-stabilized NPs to demonstrate the unique NP surface adsorption behavior of SDLC in controlling and mimicking such interactions in complex mixtures. They were significantly affected by the spacer as well as the polymeric nature of the head group of Gemini surfactants. A longer spacer impeded while a polymeric head group facilitated the interactions. The Au-Ag NPs interactions in an aqueous phase were also controlled by placing surface-active magnetic NPs at an aqueous-air interface, which interacted with either or both kinds of interacting NPs in an aqueous phase and reduced their ability to interact with each other. On the other hand, water-soluble zwitterionic magnetic NPs proved to be excellent extractants of both Au and Ag NPs from the aqueous phase. Extraction efficiency depended on the strength of interactions between the water-soluble magnetic NPs and aqueous-solubilized Au and/or Ag NPs.
Language	English
Publishing date	2021-05-20
Publishing country	United States
Document type	Journal Article ; Research Support, Non-U.S. Gov't
ZDB-ID	2005937-1
ISSN	1520-5827 ; 0743-7463
ISSN (online)	1520-5827
ISSN	0743-7463
DOI	10.1021/acs.langmuir.1c00956
Database	MEDical Literature Analysis and Retrieval System OnLINE

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