FTIR study of the solvent influence on the carbonyl absorption peak of ethyl acetate

1992 ◽  
Vol 96 (15) ◽  
pp. 6217-6220 ◽  
Author(s):  
Orland W. Kolling
Keyword(s):  
Ethyl Acetate ◽  
Absorption Peak ◽  
Ftir Study ◽  
Solvent Influence ◽  
Carbonyl Absorption

Solvent influence on infrared intensities of the ν(CO) band in ethyl acetate and fluroactetates

1986 ◽  
Vol 142 ◽  
pp. 235-238
Author(s):  
R. Notario ◽  
M.V. García ◽  
M.I. Redondo
Keyword(s):  
Ethyl Acetate ◽  
Solvent Influence ◽  
Infrared Intensities

The Effect of UV Light and Xenon Lamp on Anti-Aging Properties of Recycled Milk-Cartons/PE Composite Siding

2012 ◽  
Vol 174-177 ◽  
pp. 1107-1112 ◽  
Author(s):  
Jing Jing Li ◽  
Da Gang Li ◽  
Yong Guo
Keyword(s):  
Uv Light ◽  
Colour Change ◽  
Accelerated Aging ◽  
Absorption Peak ◽  
Xenon Lamp ◽  
Ftir Analysis ◽  
Aging Properties ◽  
Carbonyl Absorption

The colour change and flextural properties of recycled milk-cartons/PE composite siding after tested in UV light accelerated aging champer and xenon lamp accelerated aging champer were studied. It showed that:(1)The ΔE value of samples in UV light champer was higher a little than it in xenon lamp champer after tested in later 1000h, which indicated UV light accelerated aging had more serious damage on material compared with xenon lamp accelerated aging; (2)The MOE of samples reduced 26.24%、39.82%、45.44% respectively after tested in UV light champer for 500h, 1000h, 1500h, with the MOR reducing 18.39%、19.01%、30.65%; while the MOE reduced 11.91%、29.60%、44.94% respectively after tested in xenon lamp champer for 500h, 1000h, 1500h, with the MOR reducing 8.53%、8.21%、26.02%, which showed that the effect on flextrual properties of UV light champer was greater than xenon lamp champer; (3) FTIR analysis showed it appeared carbonyl absorption peak on sample’s surface and methylene content increased a lot, which indicated polymer molecular chains had degraded into samll molecular chains.

Solvent influence on the υ(CO) band shape of ethyl acetate

1988 ◽  
Vol 39 ◽  
pp. 111-114 ◽  
Author(s):  
A. Hernanz
Keyword(s):  
Ethyl Acetate ◽  
Band Shape ◽  
Solvent Influence

Single-peak-regulation and wide-angle dual-band metamaterial absorber based on hollow-cross and solid-cross resonators

2020 ◽  
Vol 91 (3) ◽  
pp. 30901
Author(s):  
Yibo Tang ◽  
Longhui He ◽  
Jianming Xu ◽  
Hailang He ◽  
Yuhan Li ◽  
...  
Keyword(s):  
Transverse Electric ◽  
Surface Current ◽  
Dielectric Substrate ◽  
Transverse Magnetic ◽  
Metamaterial Absorber ◽  
Absorption Peak ◽  
Dual Band ◽  
Single Peak ◽  
Wide Angle ◽  
Surface Current Density

A dual-band microwave metamaterial absorber with single-peak regulation and wide-angle absorption has been proposed and illustrated. The designed metamaterial absorber is consisted of hollow-cross resonators, solid-cross resonators, dielectric substrate and metallic background plane. Strong absorption peak coefficients of 99.92% and 99.55% are achieved at 8.42 and 11.31 GHz, respectively, which is basically consistent with the experimental results. Surface current density and changing material properties are employed to illustrate the absorptive mechanism. More importantly, the proposed dual-band metamaterial absorber has the adjustable property of single absorption peak and could operate well at wide incidence angles for both transverse electric (TE) and transverse magnetic (TM) waves. Research results could provide and enrich instructive guidances for realizing a single-peak-regulation and wide-angle dual-band metamaterial absorber.

Antioxidant and anticancer activities of methanolic, ethyl acetate and chloroform extracts of Arum Palaestinum

Planta Medica ◽  
2012 ◽  
Vol 78 (11) ◽  
Author(s):  
M Diab-Assaf ◽  
RI Taleb ◽  
W Shebaby ◽  
A Mansour ◽  
CJ Moussa ◽  
...  
Keyword(s):  
Ethyl Acetate ◽  
Anticancer Activities

Antinociceptive profile of ethyl acetate extract of Hyptis fruticosa Salzm. ex Benth. (Labiatae)

Planta Medica ◽  
2006 ◽  
Vol 72 (11) ◽  
Author(s):  
RM Marçal ◽  
DM Ptak ◽  
RR Krempser ◽  
MR Krempser ◽  
SV Floresta ◽  
...  
Keyword(s):  
Ethyl Acetate ◽  
Ethyl Acetate Extract

Phytochemical screening for identification of bioactive compounds of Lantana camara Linn. (Verbenaceae) responsible for larvicidal action against Aedes triseriatus Say, 1823 (Diptera : Culicidae)

ENTOMON ◽  
2019 ◽  
Vol 44 (2) ◽  
pp. 117-126
Author(s):  
Rhitayu Chakraborti ◽  
Probir Kumar Bandyopadhyay
Keyword(s):  
Ethyl Acetate ◽  
Bioactive Compounds ◽  
Active Ingredient ◽  
Crude Extract ◽  
Ethyl Acetate Extract ◽  
Lantana Camara ◽  
Mosquito Larvae ◽  
Aedes Triseriatus ◽  
Phytochemical Screening ◽  
Lc50 Value

Study to assess the larvicidal property of Lantana camara leaves against Aedes triseriatus larvae found that the ethyl acetate extract had profound larvicidal action with the crude extract having a LC50 value of 409.831ppm. GC-MS analysis of the ethyl acetate extract confirmed the presence of twenty-one compounds out of which beta-caryophyllene covered the highest percentage of the chromatogram area. Further tests with beta-caryophyllene against the mosquito larvae proved it to be the active ingredient of L. Camara with a LC50 value of 104.243ppm.

CONJUGATED OESTROGENS. I

1963 ◽  
Vol 43 (3) ◽  
pp. 345-360 ◽  
Author(s):  
Stanley Kushinsky ◽  
Jane (Wu) Tang
Keyword(s):  
Molecular Weight ◽  
Formic Acid ◽  
Ethyl Acetate ◽  
High Molecular Weight ◽  
Secondary Amine ◽  
Aqueous Ammonia ◽  
Organic Solution ◽  
Extraneous Material

ABSTRACT A convenient and mild procedure is described in this paper whereby free and conjugated oestrogens may be extracted from urine. The extracts containing approximately 90 per cent of the oestrogens are devoid of most of the extraneous material and may be reduced in volume to less than 1/15 of that of the urine. The procedure consists of the following steps: (1) a 10 per cent (v/v) solution of a high molecular weight secondary amine (Amberlite LA-2, Rohm and Haas) in ethyl acetate is washed with formic acid and water, (2) the oestrogens in urine (acidified to pH 2 or 3 with H2SO4) are extracted with the LA-2 solution, (3) the oestrogen fraction is back-extracted from the organic solution with dilute aqueous ammonia.

Sign in / Sign up

Export Citation Format

Share Document