Results 241 to 250 of about 44,690 (331)

Surfactant‐Modified Progesterone‐Loaded PVP/Cellulose Fibres for Future Drug Delivery Applications in Menopause

open access: yesMacromolecular Materials and Engineering, EarlyView.
Surfactant‐modified progesterone‐loaded PVP/cellulose fibres present a novel transdermal drug delivery system for hormone replacement therapy in menopause. Electrospun ethyl cellulose and cellulose acetate matrices, optimised by inclusion of polysorbate 80, are studied via SEM, FTIR, rheology, and in vitro studies and found to have improved structure ...
Omar Shafi   +6 more
wiley   +1 more source

Are Operating Margin, Markup and Unit Margin Good for Profit? An Approach Based on Microeconomic Theory

open access: yesManagerial and Decision Economics, EarlyView.
ABSTRACT Managers often say that they want to make their company more profitable by increasing the unit margin, operating margin, or margin rate, making these strategic objectives. There is some confusion in their language, as these three metrics seem to be equivalent to maximum profit.
Louis de Mesnard
wiley   +1 more source

Degenerate Parabolic Differential Equations

open access: yesPublications of the Research Institute for Mathematical Sciences, 1973
openaire   +3 more sources

An Improved Mesh Stiffness Model for a Gear Tooth With Double Cracks on Both Sides Considering Opened and Closed States

open access: yesInternational Journal of Mechanical System Dynamics, EarlyView.
ABSTRACT Research on the failure mechanisms of gears with multiple cracks has gained widespread attention. Among these, the study of the mesh stiffness characteristics of gears with multiple cracks is crucial for optimizing gear design and improving transmission reliability.
Luyan Xu, Xin Yu, Yunyun Sun
wiley   +1 more source

Sustainable two‐step functionalization of carbon fibers (CFs) with polyethyleneimine and investigation of curing kinetics in composite materials

open access: yesPolymer Composites, EarlyView.
We followed the functionalization steps outlined in the figure to obtain carbon fibers (CFs) functionalized with branched polyethyleneimine (b‐PEI). The entire process was carried out under mild conditions, including plasma activation and low‐temperature heating, using an eco‐friendly solvent (water).
Edoardo Albertini   +7 more
wiley   +1 more source

Effects of oxidation and silanization on the durability and tensile properties of carbon nanotube‐reinforced vinyl‐ester nanocomposites

open access: yesPolymer Composites, EarlyView.
Schematic representation of the functionalization, processing steps, and tensile properties of carbon nanotube‐reinforced vinyl ester nanocomposites. Abstract Carbon nanotubes (CNTs) have received significant attention due to their exceptional physical and mechanical properties. Advancements in surface modification techniques have facilitated their use
Yasaman Alaei   +4 more
wiley   +1 more source

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