Results 61 to 70 of about 286,268 (333)

Determinação quantitativa da concentração de silicone em antiespumantes por espectroscopia FT-IR / ATR e calibração multivariada Quantitative determination of silicone in antifoaming products by FT-IR / ATR spectroscopy and multivariate calibration

open access: yesPolímeros, 2004
Neste trabalho apresentamos uma alternativa para a dosagem do teor de silicone (polidimetilsiloxano) em antiespumantes por meio da técnica de espectroscopia no infravermelho com transformada de Fourier (FT-IR), com a utilização do acessório de ...
Marcelo H. F. Garcia   +2 more
doaj   +1 more source

Structural characterisation of pre-processed thermoplastic protein derived from bloodmeal [PDF]

open access: yes, 2012
Additives are required to convert bloodmeal powder into an extrudable thermoplastic protein-based bioplastic. These include a protein denaturant, a surfactant, a reducing agent and plasticisers.
Bier, James Michael   +2 more
core   +1 more source

TG, FT-IR and NMR characterization of n-C16H34 contaminated alumina and silica after mechanochemical treatment [PDF]

open access: yes, 2008
This paper deals with the application of mechanochemistry to model systems composed of alumina or silica artificially contaminated with n-C16H34. The mechanochemical treatment was carried out by means of a ring mill for times ranging from 10 to 40 h ...
L. DE STEFANO   +6 more
core   +1 more source

Inactivating SARS‐CoV‐2 Virus with MOF‐Composites as Smart Face Masks

open access: yesAdvanced Functional Materials, EarlyView.
In situ preparation and functionalization of MOF@Cotton fabrics as smart face masks for the immobilization of proteins and inactivation viruses, such as SARS‐CoV‐2. Abstract The significant impact of the SARS‐CoV‐2 (COVID‐19) pandemic outbreak on people's lives has highlighted the urgent need for effective personal protective equipment.
Romy Ettlinger   +9 more
wiley   +1 more source

Synthesis a Number of Heterocyclic Compounds and some of chalcones Derived From Levofloxacin

open access: yesTikrit Journal of Pure Science, 2023
The hydrazide (1) was used as synthone for the following Compound pyridazine-3,6-dione (2) by reaction of hydrazide (1) with maleic  anhydride and Compound phthalazine-1,4-dione (3) by the reaction of  hydrazide (1) with phthalic anhydride.
Ekram Abdullah Basheer   +2 more
doaj   +1 more source

Tuning the Electronic Structure and Spin State of Fe─N─C Catalysts Using an Axial Oxygen Ligand and Fe Clusters for High‐Efficiency Rechargeable Zinc–Air Batteries

open access: yesAdvanced Functional Materials, EarlyView.
A FeN4─O/Clu@NC‐0.1Ac catalyst containing atomically‐dispersed FeN4─O sites (medium‐spin Fe2+) and Fe clusters delivered a half‐wave potential of 0.89 V for ORR and an overpotential of 330 mV at 10 mA cm−2 for OER in 0.1 m KOH. When the catalyst was used in a rechargeable Zn–air battery, a power density of 284.5 mW cm−2 was achieved with excellent ...
Yongfang Zhou   +8 more
wiley   +1 more source

Study of semi-synthetic plastic objects of historic interest using non-invasive total reflectance FT-IR [PDF]

open access: yes, 2016
A significant proportion of modern and contemporary artifacts and objects of historical interest, are composed of materials in the form of synthetic, semi-synthetic, and natural polymers.
Bartolozzi, G   +4 more
core   +1 more source

Endothelial Cells Angiogenesis in Sulfated Glycosaminoglycan (GAG) Hydrogels Enhanced by Bioactive Glass‐Released Ions

open access: yesAdvanced Functional Materials, EarlyView.
A mechanically tunable hydrogel composed of gelatin, chondroitin sulfate and laminin promotes angiogenesis in vitro without the supplement of growth factors. Endothelial cells morphogenesis was further enhanced by medium conditioned with bioactive glass 58S‐released ions (Ca and Si), thus offering a promising strategy to vascularize 3D tissue ...
Marco Piazzoni   +13 more
wiley   +1 more source

FT-IR profiling reveals differential response of roots and leaves to salt stress in a halophyte Sesuvium portulacastrum (L.) L.

open access: yesBiotechnology Reports, 2019
In a halophyte, Sesuvium portulacastrum (L.) L., we have applied Fourier Transform InfraRed (FT-IR) spectroscopy to detect the corresponding changes associated with salt-induced physiological changes under long- term treatment with 0, 100 and 500 mM NaCl.
G.C. Nikalje   +3 more
doaj   +1 more source

Double-walled carbon nanotube dispersion via surfactant substitution [PDF]

open access: yes, 2009
A new approach for the stabilisation of double-walled carbon nanotubes in aqueous media was developed. A low molecular weight surfactant was used in the first stage for the debundling of the nanotubes followed by substitution with a higher molecular ...
Datsyuk, Vitaliy   +6 more
core   +3 more sources

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