Results 11 to 20 of about 368,707 (256)

The Comparison of Advanced Electrospun Materials Based on Poly(-3-hydroxybutyrate) with Natural and Synthetic Additives

open access: yesJournal of Functional Biomaterials, 2022
The comparison of the effect of porphyrins of natural and synthetic origin containing the same metal atom on the structure and properties of the semi-crystalline polymer matrix is of current concern.
Polina Tyubaeva   +7 more
doaj   +1 more source

Humidity and Light Modulate Oxygen-Induced Viability Loss in Dehydrated Haematococcus lacustris Cells

open access: yesOxygen, 2022
Haematoccocus lacustris (previously H. pluvialis) is a desiccation-tolerant unicellular freshwater green alga. During acclimation to desiccation, astaxanthin-rich lipid bodies and low-molecular-weight antioxidants (α-tocopherol, glutathione) accumulate ...
Thomas Roach   +2 more
doaj   +1 more source

Molecular Dynamics Study of Molecular Mobility in Catenanes [PDF]

open access: yesDefect and Diffusion Forum, 2005
Molecular machines described in this paper are meant to be such molecular systems that make use of conformational mobility (i.e. hindered rotation around chemical bonds and molecular construction deformations with formation and breakage of nonvalent bonds). Components of molecular machines move mainly by means of restricted diffusion.
Tourleigh, Ye. V., Shaitan, K. V.
openaire   +2 more sources

Recent Advances in the Application of Characterization Techniques for Studying Physical Stability of Amorphous Pharmaceutical Solids

open access: yesCrystals, 2021
The amorphous form of a drug usually exhibits higher solubility, faster dissolution rate, and improved oral bioavailability in comparison to its crystalline forms.
Yanan Wang   +7 more
doaj   +1 more source

Temporal-Spatial Property of Small Molecular Sugars and Its Applications in the Processing and Storage of Sugar-Rich Foods: A Review

open access: yesShipin gongye ke-ji, 2022
The physical properties of small molecular sugars, such as monosaccharides and oligosaccharides, are important to determine the processibility, storage stability, safety and nutritional value of sugar-rich foods.
Fanghui FAN, Tingting CUI, Yaowen WU
doaj   +1 more source

Evidence of Strong Guest–Host Interactions in Simvastatin Loaded in Mesoporous Silica MCM-41

open access: yesPharmaceutics, 2023
A rational design of drug delivery systems requires in-depth knowledge not only of the drug itself, in terms of physical state and molecular mobility, but also of how it is distributed among a carrier and its interactions with the host matrix.
Teresa Cordeiro   +9 more
doaj   +1 more source

Molecular Mobility of Polymers at the Melting Transition

open access: yesACS Macro Letters, 2023
Melting of crystals is an archetypical first order phase transition. Albeit extensive efforts, the molecular origin of this process in polymers is still not clear. Experiments are complicated by the tremendous change in mechanical properties and the occurrence of parasitic phenomena masking the genuine material response.
Bao Wang   +3 more
openaire   +4 more sources

Molecular mobility research in polyethylene composite films

open access: yesPhysics of Complex Systems, 2022
α-relaxation in composite films of low-density polyethylene with soot particles was investigated through thermostimulated depolarisation and differential scanning calorimetry.
Юрий Андреевич Гороховатский   +3 more
doaj   +3 more sources

Prediction of Unwanted Crystallization of Freeze-Dried Protein Formulations Using α-Relaxation Measurements

open access: yesPharmaceutics, 2023
There is a lack of methods to predict the isothermal crystallization behavior of amorphous freeze-dried formulations stored below the glass transition temperature. This study applies isothermal microcalorimetry to predict long-term crystallization during
Sebastian Groël   +2 more
doaj   +1 more source

Molecular mobility in crystallising aromatic thermoplastic polyimide R-BAPS

open access: yesPhysics of Complex Systems, 2020
The molecular mobility of the thermoplastic aromatic R-BAPS polyimide films based on 1,3-bis (3,3’-4,4’-dicarboxyphenoxy) benzene (dianhydride) and 4,4’-bis (4-aminophenoxy) biphenyl was studied using the dielectric method.
Наталья Алексеевна Никонорова   +2 more
doaj   +1 more source

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