Characterization of Hydrogen Bonding between Selected Barbiturates and Polyethylene Glycol 4000 by IR Spectral Analysis

1975 ◽  
Vol 64 (11) ◽  
pp. 1787-1797 ◽  
Author(s):  
B.L. Chang ◽  
N.O. Nuessle ◽  
W.G. Haney
Keyword(s):  
Hydrogen Bonding ◽  
Spectral Analysis ◽  
Polyethylene Glycol ◽  
Polyethylene Glycol 4000

Characterization of solid dispersions of piroxicam/polyethylene glycol 4000

1992 ◽  
Vol 84 (2) ◽  
pp. 197-202 ◽  
Author(s):  
Mercedes Fernández ◽  
Inés Carmen Rodríguez ◽  
Maŕia Victoria Margarit ◽  
Antonio Cerezo
Keyword(s):  
Polyethylene Glycol ◽  
Solid Dispersions ◽  
Polyethylene Glycol 4000

scholarly journals Toward Physicochemical and Rheological Characterization of Different Injectable Hyaluronic Acid Dermal Fillers Cross-Linked with Polyethylene Glycol Diglycidyl Ether

Polymers ◽  
2021 ◽  
Vol 13 (6) ◽  
pp. 948
Author(s):  
Nicola Zerbinati ◽  
Sabrina Sommatis ◽  
Cristina Maccario ◽  
Maria Chiara Capillo ◽  
Giulia Grimaldi ◽  
...  
Keyword(s):  
Hyaluronic Acid ◽  
Polyethylene Glycol ◽  
Biological Activities ◽  
Diglycidyl Ether ◽  
Dermal Filler ◽  
Cross Linking ◽  
Matrix Structure ◽  
Dermal Fillers ◽  
Rheological Characterization

(1) Background: Injectable hyaluronic acid (HA) dermal fillers are used to restore volume, hydration and skin tone in aesthetic medicine. HA fillers differ from each other due to their cross-linking technologies, with the aim to increase mechanical and biological activities. One of the most recent and promising cross-linkers is polyethylene glycol diglycidyl ether (PEGDE), used by the company Matex Lab S.p.A., (Brindisi, Italy) to create the HA dermal filler PEGDE family. Over the last few years, several studies have been performed to investigate the biocompatibility and biodegradability of these formulations, but little information is available regarding their matrix structure, rheological and physicochemical properties related to their cross-linking technologies, the HA content or the degree of cross-linking. (2) Methods: Seven different injectable HA hydrogels were subjected to optical microscopic examination, cohesivity evaluation and rheological characterization in order to investigate their behavior. (3) Results: The analyzed cross-linked dermal fillers showed a fibrous “spiderweb-like” matrix structure, with each medical device presenting different and peculiar rheological features. Except for HA non cross-linked hydrogel 18 mg/mL, all showed an elastic and cohesive profile. (4) Conclusions: The comparative analysis with other literature works makes a preliminary characterization of these injectable medical devices possible.

A computational characterization of the hydrogen-bonding and stacking interactions of hypoxanthine

2007 ◽  
Vol 9 (4) ◽  
pp. 497-509 ◽  
Author(s):  
Lesley R. Rutledge ◽  
Craig A. Wheaton ◽  
Stacey D. Wetmore
Keyword(s):  
Hydrogen Bonding ◽  
Stacking Interactions

Characterization of chloride ion binding to human serum albumin using chlorine NMR null point spectral analysis

1993 ◽  
Vol 115 (3) ◽  
pp. 1095-1105 ◽  
Author(s):  
William S. Price ◽  
Nien Hui Ge ◽  
Luan Ze Hong ◽  
Lian Pin Hwang
Keyword(s):  
Spectral Analysis ◽  
Human Serum Albumin ◽  
Serum Albumin ◽  
Human Serum ◽  
Chloride Ion ◽  
Null Point ◽  
Ion Binding

Spectral synthesis and residually finite-dimensional algebras

2017 ◽  
Vol 16 (10) ◽  
pp. 1750200 ◽  
Author(s):  
László Székelyhidi ◽  
Bettina Wilkens
Keyword(s):  
Spectral Analysis ◽  
Abelian Group ◽  
Theoretical Approach ◽  
Abelian Groups ◽  
Spectral Synthesis ◽  
Residually Finite ◽  
Finite Dimensional ◽  
Analysis And Synthesis ◽  
Spectral Analysis And Synthesis

In 2004, a counterexample was given for a 1965 result of R. J. Elliott claiming that discrete spectral synthesis holds on every Abelian group. Since then the investigation of discrete spectral analysis and synthesis has gained traction. Characterizations of the Abelian groups that possess spectral analysis and spectral synthesis, respectively, were published in 2005. A characterization of the varieties on discrete Abelian groups enjoying spectral synthesis is still missing. We present a ring theoretical approach to the issue. In particular, we provide a generalization of the Principal Ideal Theorem on discrete Abelian groups.

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