Results 121 to 130 of about 26,167 (268)

Identification of Organic Compounds in Wood and Bark of Persian Oak Having Different Levels of Crown Dieback Using Gas Chromatography-Mass Spectrometry

open access: yesBioResources
The influence of environmental factors on variations in organic compound content of sapwood and inner bark of mature Persian oaks were investigated in the Zagros forests, western Iran.
Hamid R. Naji   +3 more
doaj  

Accumulation, sources, and health risks of phthalic acid esters (PAEs) in road dust from heavily industrialized, urban and rural areas in southern Iran. [PDF]

open access: yesHeliyon, 2023
Karamianpour J   +10 more
europepmc   +1 more source

Atmospheric Research and Monitoring Study of Hazardous Substances [PDF]

open access: yes, 1985
Hazardous Waste Research and Information Center Illinois Department of Energy and Natural ...
Gatz, Donald F., Sweet, Clyde W.
core  

Vinyl capped addition polyimides [PDF]

open access: yes
Polyimide resins (PMR) are generally useful where high strength and temperature capabilities are required (at temperatures up to about 700 F). Polyimide resins are particularly useful in applications such as jet engine compressor components, for example,
Delvigs, Peter   +2 more
core   +1 more source

Polyimide Matrix composites: Polyimidesulfone/LARC-TPI (1:1) blend [PDF]

open access: yes
Polyimide matrix composites were fabricated from unidirectional unsized AS-4 carbon fiber and a doped 1:1 blend of two polyimides: benzophenone dianhydride-3,3'-diamino diphenylsulfone (PISO2) and benzophenone dianhydride-3,3'-diamino benzophenone (LARC ...
Baucom, Robert M.   +3 more
core   +1 more source

Soil derived metabolic profiling and their impact on the root growth in peanuts (Arachis hypogaea L.)

open access: yesChemical and Biological Technologies in Agriculture
Plant growth is intricately regulated by soil ecosystems, where dynamic interactions between plants and soil metabolites shape root development. As critical mediators of these interactions, soil metabolites not only reflect biogeochemical cycling but ...
Lingling Wu   +9 more
doaj   +1 more source

Dicarboxylic acid anhydride condensation with compounds containing active methylene groups. 4: Some 4-nitrophthalic anhydride condensation reactions [PDF]

open access: yes
By 4-nitrophthalic anhydride condensation with acetoacetate in acetic anhydride and triethylamine solution with subsequent breakdown of the intermediate condensation product, 5-nitroindanedione-1,3 was obtained.
Oskaja, V., Rotberg, J.
core   +1 more source

Semi-interpenetrating polymer network for tougher and more microcracking resistant high temperature polymers [PDF]

open access: yes, 1992
This invention is a semi-interpenetrating polymer network which includes a high performance thermosetting polyimide having a nadic end group acting as a crosslinking site and a high performance linear thermoplastic polyimide. An improved high temperature
Pater, Ruth H.
core   +1 more source

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