Results 31 to 40 of about 7,111 (212)

Absolute Antioxidant Activity of Five Phenol-Rich Essential Oils

open access: yesMolecules, 2021
Essential oils (EOs) have promising antioxidant activities which are gaining interest as natural alternatives to synthetic antioxidants in the food and cosmetic industries.
Yafang Guo   +5 more
doaj   +1 more source

Cumene cracking on NaY zeolite [PDF]

open access: yes, 2000
На відміну від кислотних форм цеолітів крекінг кумолу в імпульсному режимі на NaY при 400−500 ºС крім пропілену та бензолу дає лише слідові кількості толуолу та етилбензолу, але більш значна частина кумолу ізомеризує до н-пропілбензолу.
Манза, І.А.   +3 more
core   +1 more source

Enhancing Energy Efficiency of Cumene Production Through Reactor Output Recycling Modification in a Heat Exchanger

open access: yesJournal of Chemical Engineering Research Progress
Cumene production generally involves irreversible and exothermic reactions that leads to an increase in product temperature and needs to be cooled for further processes.
Finishia Sutjahjo   +3 more
doaj   +1 more source

A perspective on parsimonious hybrid models for online use: Augmenting fundamental models with ARIMA disturbances

open access: yesThe Canadian Journal of Chemical Engineering, EarlyView.
Abstract Hybrid models (HMs) combine fundamental model (FM) equations with empirical components. These models can lead to improved predictions because they reduce process/model mismatch and can account for phenomena that are not considered in the FM equations.
Mouna Y. Harb, Kimberley B. McAuley
wiley   +1 more source

Synthesis and characterization of MCM-41-supported nano zirconia catalysts

open access: yesEgyptian Journal of Petroleum, 2015
Series of MCM-41 supported sulfated Zirconia (SZ) catalysts with different loadings (2.5–7.5% wt.) were prepared using direct impregnation method. The acquired solid catalysts were characterized structurally and chemically using X-RD, HRTEM, BET, FT-IR ...
Mohamed S. Abdel Salam   +5 more
doaj   +1 more source

The Expanding Role of Diazirines in Synthetic Methodology

open access: yesEuropean Journal of Organic Chemistry, EarlyView.
Beyond their established role in photoaffinity labeling, diazirines have emerged as versatile reagents in synthetic chemistry. This review highlights their dual reactivity as carbene and nitrogen‐transfer precursors, showcasing mechanistic insights and diverse applications in cyclopropanations, cycloadditions, skeletal editing, amination, heterocycle ...
Viktor Savic   +3 more
wiley   +1 more source

Tracking Short-Range Attraction and Oviposition of European Grapevine Moths Affected by Volatile Organic Compounds in a Four-Chamber Olfactometer

open access: yesInsects, 2020
The identification of volatile organic compounds (VOCs) leading to short-range attraction and oviposition of the European grapevine moth Lobesia botrana and European grape berry moth Eupoecilia ambiguella (Lepidoptera: Tortricidae) is crucial in order to
Anna Markheiser   +4 more
doaj   +1 more source

ISAba1‐mediated crp‐osmC amplification enhances host‐associated fitness in Acinetobacter baumannii

open access: yesmLife, EarlyView.
Abstract Acinetobacter baumannii is a pathogen, highly adaptable to both hospital‐ and host‐associated environments. Understanding the genetic mechanisms underlying its adaptability is critical for controlling its persistence. Our study identified the crp‐osmC gene cluster, flanked by ISAba1 elements, as a significant genetic structure undergoing ...
Da‐Wei Wei   +7 more
wiley   +1 more source

Oxidation of cumene by molecular oxygen on heterogenized cobalt catalysts

open access: yes, 1986
In the oxidation of cumene to cumene hydroperoxide by molecular oxygen in the liquid phase, the cobalt(II) catalysts heterogenized on organic cation exchangers are active only if acid functional groups of the exchanger which bind cobalt ions show medium ...
Zdeněk Prokop   +2 more
core   +1 more source

Nigratine as dual inhibitor of necroptosis and ferroptosis regulated cell death

open access: yesScientific Reports, 2022
Nigratine (also known as 6E11), a flavanone derivative of a plant natural product, was characterized as highly specific non-ATP competitive inhibitor of RIPK1 kinase, one of the key components of necroptotic cell death signaling.
Claire Delehouzé   +10 more
doaj   +1 more source

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