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Daisy-like crystals: Not just the result of sampling artifact and not only in urine.
Clin Chim Acta
December 2021
Laboratorio Clinico e di Ricerca sul Sedimento Urinario, UOC di Nefrologia, Dialisi e Trapianto di Rene, Fondazione IRCCS Ca' Granda Ospedale Maggiore Policlinico, Milano, Italy. Electronic address:
Extremely rare "daisy-like" crystals in urinary sediment can be due to a sampling artifact.
Clin Chim Acta
December 2021
Pro-Vitam Ltd, 16 Muncitorilor Street, Sfantu Gheorghe, Romania. Electronic address:
Manual urine sediment analysis of a sample obtained from a 5 year old child by our clinical diagnostics laboratory revealed abundant "daisy-like" crystals, which have been first described in 2004 and found to be extremely rare in a follow-up publication by the same research group. To date only 12 samples have been described in the literature containing such crystals. Upon further investigation on how the sample was obtained, we were able to reproduce the process without any biological specimen involved.
View Article and Find Full Text PDF"Daisy-like" crystals: A rare and unknown type of urinary crystal.
Clin Chim Acta
August 2017
Laboratoire des Lithiases, Service des Explorations Fonctionnelles, Hôpital Tenon, Paris, France.
Background: Crystals are well known structures of urinary sediment, most of which are identified by the combined knowledge of crystal morphology, birefringence features at polarized light, and urine pH. In this paper, we report on a cohort of subjects whose urine contained a very rare type of crystal, which we first described in 2004 and which, based on its peculiar morphology, we define as "daisy-like crystal" (DLcr).
Methods: Reports on DLcr were spontaneously sent to our laboratory over a 10.
Anion-Exchange Induced Strong π-π Interactions in Single Crystalline Naphthalene Diimide for Nitroexplosive Sensing: An Electronic Prototype for Visual on-Site Detection.
ACS Appl Mater Interfaces
September 2016
Center for Nanotechnology and ‡Department of Chemistry, Indian Institute of Technology, Guwahati-781039, Assam, India.
A new derivative of naphthalene diimide (NDMI) was synthesized that displayed optical, electrical, and visual changes exclusively for the most widespread nitroexplosive and highly water-soluble toxicant picric acid (PA) due to strong π-π interactions, dipole-charge interaction, and a favorable ground state electron transfer process facilitated by Coulombic attraction. The sensing mechanism and interaction between NDMI with PA is demonstrated via X-ray diffraction analysis, (1)H NMR studies, cyclic voltammetry, UV-visible/fluorescence spectroscopy, and lifetime measurements. Single crystal X-ray structure of NDMI revealed the formation of self-assembled crystalline network assisted by noncovalent C-H···I interactions that get disrupted upon introducing PA as a result of anion exchange and strong π-π stacking between NDMI and PA.
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