Materials Literature
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Ternstroemia pringlei is a medicinal plant widely distributed in Mexico. Since , a series of antioxidative phenylethanoid glycosides have been isolated in the Asiatic species T. japonica [1], we decided to study the antioxidative action of T. pringlei extracts obtained from various organs, and to investigate the prese…
The ultimate goal of an anticancer regime is to eliminate tumor cells without harming healthy cells. However, currently used chemotherapeutic drugs are not selective and hence attack both healthy and tumor cells which results in very serious side effects. Targeted delivery of anticancer drugs to tumors utilizing nanop…
Four novel doxorubicin derivatives have been designed and synthesized. Comparable bioactivities to doxorubicin or even higher were observed against A2780 human ovarian cancer cell. By conjugating to the surface of gold nanoparticles modified with poly(ethylene glycol) (PEG) and TNFα, four new drug delivery systems hav…
The plant Weigela subsessilis L. H. BAILEY is an endemic species that grows over all in Korea. It showed anti-complementary activity, inhibitory effect of LDL oxidation, and stimulation of glucose uptake effect. However, few investigations have been reported about this plant. Therefore, to find more constituents of th…
Graviola ( Annona muricata ) is an edible and medicinal fruit tree indigenous to the warmest tropical areas in America. The products from fruit or leaf and stem have been available as supplements in the market. Under bioactivity-guided isolation, six compounds were prepared from graviola fruit pulp via open column chr…
Identification and characterisation of natural products (NPs) capable to combat inflammatory processes and disorders associated with inflammation is the main aim of an Austrian research network with the acronym DNTI, which is now in the sixth year of its implementation. This goal is approached by a unique combination…
Electron paramagnetic resonance Prior to any detailed discussion of electron paramagnetic resonance (EPR) and nuclear magnetic resonance (NMR) methods, it is worthwhile considering the more general phenomena applicable to both. Magnetic phenomena Magnetism arises from the motion of charged particles, and, for the purp…
Kurt Terrani uses his expertise in materials science to develop safer fuel for nuclear power plants.
The interaction of uranium dioxide (UO₂) with environmental elements occurs at its exposed surface and a fundamental understanding of this interaction process begins at the atomic scale. In this regard, atomic scale modeling of the properties of clean and adsorbate-covered uranium dioxide (UO₂) surfaces can be used to…
以双酚A-双苯并噁嗪（简称DBOZ）和DOPO（9，10-二氢-9-氧杂-10-磷杂菲-10-氧化物）为原料，合成了双酚A-双DOPO（简称2DO），再用其与苯胺，多聚甲醛反应，合成了含双DOPO的双酚A-双苯并噁嗪（简称2DD）。采用红外，核磁共振等分析手段对2DO和2DD的化学结构进行了表征，采用差示扫描量热仪对DBOZ和2DD的固化特性进行研究，使用热重分析分析了所得聚苯并噁嗪的热稳定性。结果表明：在N 2 气氛中，含双DOPO的双酚A-双苯并噁嗪热分解温度为353℃，在442℃分解速度达到最快，800℃时的残碳率为40.40%，300℃的质量变化为3.97%。较未引入DOPO的双酚A-双苯并噁嗪树脂相比，其热分解温度提高了…
The conservation and transformation of energy is essential to the survival of mankind, and thus concerns every modern society. Solar energy, as an everlasting source of energy, holds one of the key solutions to some of the most urgent problems the world now faces, such as global warming and the oil crisis. Advances in…
We utilize ultrafast optical measurement to study the quasiparticle relaxation in stoichiometric LiFeAs and nearly optimally doped (BaK)Fe2As2 crystals. According to our temperature-dependent studies of LiFeAs, we have observed pseudogap-like feature at onset temperature of ~ 55 K, which is above Tc = 15 K. In additio…
This work presents an investigation of toughening behavior for polyethersulfone (PES) modified triglycidyl-amino-phenol (TGAP) epoxy systems using molecular dynamics (MD) simulations. The 4,4’-diaminodiphenylmethane (DDS) is used as a curing agent to form cross-linked epoxy structures. Toughening mechanism of the modi…
The results of spectroscopic investigation of plane plasma discharge and sputtering processes in the triode system are presented. The forced electric discharge with currents of 1–4 A at an argon pressure of 1 mTorr was studied using the emission spectroscopy method. The spectra of plasma discharge were observed in the…
A new methodology for mathematical modeling of transient thermal processes in structural components is proposed. It is based on the joint application of the structural method, the Bubnov-Galerkin method and S-functions to solving heat conduction problems with unsteady boundary conditions of the third kind. The analyti…
The back cover artwork was chosen to highlight a novel supercapacitor material, based on a two-phase, self-assembling structure with a Cu-rich network with high electronic conductivity but limited faradaic activity locking a highly dispersed Mn-rich matrix that exhibits high faradaic activity. High-lateral resolution…
Our manuscript contained several typographical errors within equations, and two within the Discussion section. This document serves to correct these issues so that our simulation conditions may be identically replicated by all readers.
α-Synuclein oligomers are widely accepted to be cytotoxic species in Parkinson's disease. There is debate as to whether they are intermediate species of fibril formation or the end product of aggregation. In their Communication on page 7560 ff., D. Otzen, T. J. D. Jørgensen, and co-workers show that both are correct,…
Запропоновано побудову одного з варiантiв уточненої теорiї п’єзокерамiчної оболонки при її меридiональнiй поляризацiї, отримано систему диференцiальних рiвнянь коливань оболонки та граничнi умови з використанням варiацiйного принципу Рейсснера.
α-Synuclein-Oligomere werden allgemein als zytotoxische Spezies in der Parkinson-Krankheit angesehen – es wird aber diskutiert, ob sie ein Zwischenprodukt der Fibrillenbildung oder das Endprodukt der Aggregation sind. In ihrer Zuschrift auf S. 7690 ff. zeigen D. Otzen, T. J. D. Jørgensen und Mitarbeiter, dass beide An…