Results 71 to 80 of about 51,500 (206)

Aromaticity‐Switchable Tetraoxa[8]circulenes as Anode Materials for Sodium‐Ion Batteries

open access: yesChemistryEurope, Volume 4, Issue 2, February 2026.
Aromaticity‐based electrode materials have received substantial interest in recent years. Herein, a naphtho‐tetraoxa[8]circulene (N‐TOC) is introduced, its electrochemical performance is investigated, and its charge‐storage mechanism through aromaticity switching described by computational calculations.
Patrick W. Fritz   +7 more
wiley   +1 more source

مطالعهDFT ساختار مواد رنگزایH 4-پیران‌‌های دارای پل آریل آزو [PDF]

open access: yesعلوم و فناوری رنگ, 2018
مشتقات پیران به علت دارا بودن خواص زیستی متنوع و خواص دارویی از قبیل ضد ویروس، ضد باکتری و ضد التهاب مورد توجه بسیاری از شیمی‌دان‌ها قرار گرفته‌اند. در سال‌های اخیر مطالعه‌های زیادی روی سنتز مشتقات جدید و هم چنین ارائه روش‌های جدید سنتز آنها انجام گرفته ...
محمد نیک پسند   +2 more
doaj  

Technological catch-up and strategic technology partnering in developing countries [PDF]

open access: yes
This paper examines the trends in strategic technology partnering (STP) by firms from developing countries over the period 1980-94. The evidence shows that a small group of countries, namely the Asian NICs and Eastern Europe dominate STP activity.
Narula,Rajneesh, Sadowski,Bert M.
core   +1 more source

The rest-frame UV-to-optical spectroscopy of APM 08279+5255 - BAL classification and black hole mass estimates [PDF]

open access: yes, 2018
We present the analysis of the rest-frame optical-to-UV spectrum of APM 08279+5255, a well-known lensed broad absorption line (BAL) quasar at $z = 3.911$.
Bischetti, M.   +11 more
core   +2 more sources

Quantifying the Electrophilicity of 9(10H)‐Phenanthrenone‐ and 1‐Acenaphthenone‐Derived α, β‐Unsaturated Ketones

open access: yesJournal of Physical Organic Chemistry, Volume 39, Issue 2, February 2026.
The electrophilicities (Mayr E) of the α, β‐unsaturated ketones A and B were determined by kinetic studies of their reactions with carbanions (reference nucleophiles) in DMSO at 20°C. The different reactivities of A and B were rationalized by DFT calculations.
Christoph Gross   +5 more
wiley   +1 more source

The tartan tax versus other revenue-raising options [PDF]

open access: yes, 2003
Much has already been written about the devolved Scottish Parliament's Tartan Tax-varying powers (for example Blow et al. 1996, Darby et al. 2002, Heald and Geaughan 1996 and 1999, Heald et al. 1998, Heald and McLeod 2002, McGregor et al. 1997, Midwinter
Bailey, S. J., Fingland, L.
core  

Interpreting the near-infrared spectra of the 'golden standard' Type Ia supernova 2005cf [PDF]

open access: yes, 2012
We present nine near-infrared (NIR) spectra of supernova (SN) 2005cf at epochs from -10 d to +42 d with respect to B-band maximum, complementing the existing excellent data sets available for this prototypical Type Ia SN at other wavelengths. The spectra
Benetti   +67 more
core   +4 more sources

On the Aromaticity in Cyclic H‐Bonded Chains: Linking HOMIA Descriptor to Molecular Properties

open access: yesChemistrySelect, Volume 11, Issue 5, 5 February 2026.
ABSTRACT Aromaticity is a central concept in organic chemistry to explain the high stability of conjugated rings. This study extends this concept to cyclic hydrogen‐bonded (H‐bonded) chains by introducing a modified descriptor, the harmonic oscillator model of intermolecular aromaticity (HOMIA), to quantify aromaticity in cyclic H‐bonded chains of HCN,
Murillo H. Queiroz   +3 more
wiley   +1 more source

The impact of steel protection in industrialized countries on Brazil's export capacity [PDF]

open access: yes
Since the beginning of the 1970s most industrialized countries have been facing serious structural adjustment problems in the steel sector, which can be attributed mainly to two reasons.
Amelung, Torsten
core  

Probabilistic Model Checking for Energy Analysis in Software Product Lines

open access: yes, 2013
In a software product line (SPL), a collection of software products is defined by their commonalities in terms of features rather than explicitly specifying all products one-by-one.
Baier C.   +15 more
core   +1 more source

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