Results 131 to 140 of about 550,954 (391)

Sedimentary deposition and reflux of phosphorus (P) in the Eastern Gotland Basin and their coupling with P concentrations in the water column

open access: yesOceanologia, 2005
In order to describe the role of sedimentary processes for the phosphorus (P) cycle in the open Baltic Proper, P deposition and reflux were quantified for the predominately anoxic sediments of the Eastern Gotland Basin.
Sven Hille   +2 more
doaj  

The effect of extraction method on the major constituents and biological effects of Trachyspermum ammi L. fruits [PDF]

open access: yesResearch Journal of Pharmacognosy, 2018
Background and objectives: Variety of extraction methods coupled with definite solvents could increase the removal rate ofmajor constituents from plants.
F. Farjadmand   +8 more
doaj  

Improving differential diagnosis of vocal cord dysfunction [PDF]

open access: yes, 2014
textPurpose: The purpose of this study was to assess whether the factors historically presented in the literature to differentiate vocal cord dysfunction (VCD) from breathing difficulties of other etiologies accurately predict and identify patients who ...
Bernstein, Sarah Mae
core  

On the Role of MWCNTs for the Effective Detection of Glucose Using MWCNTs/NiO/MWCNTs Stacks on Carbon Paper Electrodes

open access: yesAdvanced Sensor Research, EarlyView.
This study deciphers the mechanism of enhanced glucose detection using multiwalled carbon nanotubes and nickel oxide stacks (MWCNTs/NiO/MWCNTs) on commercially available carbon paper electrodes. We demonstrate the role of MWCNTs where the defects enrich the electrocatalytic activity when they come in contact with the glucose molecule for its selective ...
Akshay Parab   +6 more
wiley   +1 more source

Fabrication of Superinsulating Poly(Urethane‐Isocyanurate) Aerogels Derived from Upcycled Polycarbonate

open access: yesAdvanced Sustainable Systems, EarlyView.
Bisphenol‐A polycarbonate is upcycled via a simple one‐pot reaction into an aromatic Mannich polyol, which serves as a precursor for fabricating poly(urethane‐isocyanurate) (PUR‐PIR) aerogels. PUR‐PIR aerogels, prepared with different isocyanate indices, exhibit high porosities, high specific surface areas, ultralow thermal conductivity, and excellent ...
Ivona Glišić   +5 more
wiley   +1 more source

Polyimidazoles via aromatic nucleophilic displacement [PDF]

open access: yes, 1991
Polyimidazoles (PI) are prepared by the aromatic nucleophilic displacement reaction of di(hydroxyphenyl) imidazole monomers with activated aromatic dihalides or activated aromatic dinitro compounds. The reactions are carried out in polar aprotic solvents
Connell, John W., Hergenrother, Paul M.
core   +2 more sources

Fully Plant‐Based and Optically Transparent Wood Substrates with Improved Thermal Insulating Properties

open access: yesAdvanced Sustainable Systems, EarlyView.
The combination of an eco‐friendly bleaching procedure with the use of a new commercial bio‐based resin used to develop transparent wood (TW) result in a transparency level of 91% at 550 nm, alongside remarkable stability and a ≈50% reduction in thermal conductivity compared to standard glass (≈1 W m·K−1), highlighting its potential as energy‐efficient
Liya Antony   +12 more
wiley   +1 more source

Polyethyleneimine‐Modified Biosorbent Based on Banana Pseudostem Biomass for Environmental Remediation and Food Analysis

open access: yesAdvanced Sustainable Systems, EarlyView.
Biosorbents derived from banana pseudostem are functionalized with polyethyleneimine, with or without glutaraldehyde, and evaluated for dye removal and solid‐phase extraction. The materials exhibit high adsorption capacities and broad pH applicability in dye removal, while computational studies reveal amino groups as key interaction sites.
João Antonio Tavares Barboza   +11 more
wiley   +1 more source

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