This review focuses on the use of superficially porous particles (SPPs) as chiral stationary phases for ultra-high performance liquid enantioseparations. In contrast to what happened in achiral separations where core-shell particles invaded the market, the introduction of SPPs in chiral liquid chromatography (LC) has been relatively recent. This is due in part to the technical difficulties in the preparation of these phases, and in part to scarce understanding of mass transfer phenomena in chiral chromatography. As a matter of fact, nowadays, the development of superficially porous CSPs is still in its infancy. This paper covers the most recent advancements in the field of core-shell technology applied to chiral separations. We review the kinds of chiral selectors that have been used for the preparation of these phases, by discussing the advantages of chiral SPPs over their fully-porous counterparts for high efficient high throughput enantioseparations. Notwithstanding the apparently obvious advantages in terms of the mass transfer of chiral SPPs, some critical aspects that could impact their development are presented.
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http://dx.doi.org/10.1039/c6an02530g | DOI Listing |
ACS Nano
January 2025
Department of Bioengineering, University of Pennsylvania, 210 S. 33rd Street, 435 Skirkanich Hall, Philadelphia, Pennsylvania 19104, United States.
Nanoparticles have gained attention as drug delivery vehicles for cancer treatment, but often struggle with poor tumor accumulation and penetration. Single external magnets can enhance magnetic nanoparticle delivery but are limited to superficial tumors due to the rapid decline in the magnetic field strength with distance. We previously showed that a 2-magnet device could extend targeting to greater tissue depths.
View Article and Find Full Text PDFInt J Nanomedicine
December 2024
Department of Plastic Surgery, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430022, People's Republic of China.
Purpose: Successful regeneration of cranial defects necessitates the use of porous bone fillers to facilitate cell proliferation and nutrient diffusion. Open porous microspheres, characterized by their high specific surface area and osteo-inductive properties, offer an optimal microenvironment for cell ingrowth and efficient ossification, potentially accelerating bone regeneration.
Materials And Methods: An in vitro investigation was conducted to assess the physicochemical properties, porosity, and biocompatibility of PHA-nano-clay open porous microspheres.
Small
December 2024
School of Chemical Science and Engineering, Department of Thoracic Surgery, Shanghai Tongji Hospital, Tongji University, Shanghai, 200092, P. R. China.
Anthropogenic activities have caused a significant rise in nitrate and ammonia nitrogen levels in natural water bodies, disrupting the balance of the nitrogen cycle. The electrocatalytic reduction of nitrate and the oxidation of ammonia are promising strategies for converting polyvalent nitrogen into nontoxic and harmless N. Herein, a bifunctional electrode loaded with diatomic iron-nickel site on porous N-doped carbon (FeNi-NC) is designed and successfully applied for the co-electrolysis of nitrate and ammonia.
View Article and Find Full Text PDFJ Stomatol Oral Maxillofac Surg
September 2024
Department of Maxillofacial-Plastic-Aesthetic Surgery, Viet-Duc University Hospital, 40 Trang Thi, Hanoi, Viet Nam.
Introduction: The two most severe complications of single-stage, porous polyethene microtia reconstruction are flap necrosis/framework exposure and frontal nerve paralysis. To reduce these risks, require a temporoparietal fascia (TPF) flap that includes both the parietal and frontal branches of the superficial temporal artery (STA) while sparing the nerve. We propose a classification that helps minimize said complications.
View Article and Find Full Text PDFJ Pharm Biomed Anal
December 2024
Department of Chemistry and Biochemistry, University of Texas at Arlington, TX 76019, USA; AZYP, LLC, Arlington, TX 76019, USA. Electronic address:
1,4-dihydropyridine (DHP) scaffold occupies a prominent position among all heterocyclic compounds owing to its versatile pharmacological properties, particularly its well-known calcium channel blocking activity. In the quest of developing new calcium channel blockers, fifty seven 5-oxo-hexahydroquinoline (HHQ) derivatives carrying DHP framework in a condensed ring system were recently synthesized as racemic mixtures. Due to their potential as drug candidates, enantiomers arising from the asymmetric center at the C-4 position of the HHQ ring were separated.
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