Results 121 to 130 of about 678,286 (388)

Re‐evaluation of argon (E 938) and helium (E 939) as food additives

EFSA Journal
The Panel on Food Additives and Flavourings (FAF) provides a scientific opinion re‐evaluating the safety of the two food additives argon (E 938) and helium (E 939). Argon (Ar) and helium (He) are two noble gases, highly stable single atoms.
EFSA FAF Panel (EFSA Panel on Food Additives and Flavourings), Laurence Castle, Monica Andreassen, Gabriele Aquilina, Maria Bastos, Polly Boon, Biagio Fallico, Reginald Fitzgerald, Maria Jose Frutos Fernandez, Bettina Grasl‐Kraupp, Ursula Gundert‐Remy, Rainer Gürtler, Eric Houdeau, Marcin Kurek, Henriqueta Louro, Patricia Morales, Sabina Passamonti, Salvatore Multari, Josef Daniel Rasinger, Ana Maria Rincon, Sam Vermeiren, Camilla Smeraldi   +21 more
doaj   +1 more source

Absorption Measurement in Ultrapure Crystalline Quartz with the Eliminated Influence of Ambient Air Absorption in the Time-Resolved Photothermal Common-Path Interferometry Scheme

Applied Sciences
We demonstrate measurements of the absorption coefficient α ≈ 2.5 × 10−7 cm−1 in synthetic crystalline quartz at a wavelength of 1071 nm with a signal-to-noise ratio of 10/1 using the Time-resolved photothermal common-path interferometry (TPCI) scheme ...
Ksenia Vlasova, Alexandre Makarov, Nikolai Andreev   +2 more
doaj   +1 more source

Unrolling of Syngonium podophyllum: Functional Anatomy, Morphology and Modelling of Its Peltate Leaves

Advanced Biology, EarlyView.
The unrolling of the peltate leaves in Syngonium podophyllum is analyzed and quantified (left‐hand side to center). These measurements serve to verify a mathematical model for leaf unrolling based on the model used in Schmidt (2007). An additional formula for obtaining a layer mismatch from a prescribed radius is derived.
Michelle Modert, Nick Seinsche, Sören Bartels, Tom Masselter, Thomas Speck   +4 more
wiley   +1 more source

Terrorism, Islamism, and Western Liberal Democracies: Prospects for Nonviolent, Proactive Countermeasures to Terror [PDF]

, 2011
This article outlines some prospects for nonviolent, proactive countermeasures to terrorism, essentially interreligious dialogue, with the aim and intention of incorporating multidisciplinary approaches to understanding associated phenomena and ...
Argon, Kemal
core  

I. The expansion of argon and of helium as compared with that of air and hydrogen [PDF]

, 1896
J. P. Kuenen, Wyatt W Randall
openalex   +1 more source

Mechanochemical Synthesis and Characterization of Nanostructured ErB4 and NdB4 Rare‐Earth Tetraborides

Advanced Engineering Materials, Volume 27, Issue 6, March 2025.
ErB4 and NdB4 nanostructured powders are produced by mechanochemical synthesis. 5 h mechanical alloying and 4 M HCl acid leaching are used in the production. ErB4 and NdB4 powders exhibit maximum magnetization of 0.4726 emu g−1 accompanied with an antiferromagnetic‐to‐paramagnetic phase transition at about TN = 18 K and 0.132 emu g−1 with a maximum at ...
Burçak Boztemur, Faruk Kaya, Bora Derin, Mustafa Lütfi Öveçoğlu, Ju Li, Duygu Ağaoğulları   +5 more
wiley   +1 more source

Über die Druckwage und die Isothermen von Luft, Argon und Helium zwischen 0 und 200° [PDF]

, 1915
L. Holborn, H. Schultze
openalex   +1 more source

Primordial argon isotope fractionation in the atmosphere of Mars measured by the SAM instrument on Curiosity and implications for atmospheric loss

Geophysical Research Letters, 2013
The quadrupole mass spectrometer of the Sample Analysis at Mars (SAM) instrument on Curiosity rover has made the first high‐precision measurement of the nonradiogenic argon isotope ratio in the atmosphere of Mars. The resulting value of 36Ar/38Ar = 4.2 ± 
S. Atreya, M. Trainer, H. Franz, M. Wong, H. Manning, C. Malespin, P. Mahaffy, P. Conrad, A. Brunner, L. Leshin, John H. Jones, C. Webster, T. Owen, R. Pepin, R. Navarro‐González   +14 more
semanticscholar   +1 more source

A Different Perspective on the Solid Lubrication Performance of Black Phosphorous: Friend or Foe?

Advanced Engineering Materials, EarlyView.
Researchers investigate black phosphorous (BP) as a standalone solid lubricant coating through ball‐on‐disc linear‐reciprocating sliding experiments in dry conditions. Testing on different metals shows BP doesn't universally reduce friction and wear. However, it achieves 33% friction reduction on rougher iron surfaces and 23% wear reduction on aluminum.
Matteo Vezzelli, Manel Rodríguez Ripoll, Sabine Schwarz, Ali Erdemir, Maria Clelia Righi, Carsten Gachot   +5 more
wiley   +1 more source

İLKÖĞRETİM OKULU YÖNETİCİLERİNİN İLETİŞİM SÜRECİNDE YAŞADIKLARI PROBLEMLER

Sakarya Üniversitesi Eğitim Fakültesi Dergisi, 2013
Okullarda iletişim sürecini başlatan ve yapısını belirleyen kişi okul yöneticisidir.Okul yöneticilerinin kişisel özellikleri arasında yer alan iletişim becerileri, okulun iletişimsüreçlerini belirlemede ve üyelerin okuldaki davranışlarını etkilemede son ...
Demet Zafer, Türkan Argon
doaj