scholarly journals Triboluminescence Phenomenon Based on the Metal Complex Compounds—A Short Review

Materials ◽  
2021 ◽  
Vol 14 (23) ◽  
pp. 7142
Author(s):  
Adam Szukalski ◽  
Adam Kabanski ◽  
Julia Goszyk ◽  
Marek Adaszynski ◽  
Milena Kaczmarska ◽  
...  
Keyword(s):  
Metal Complex ◽  
Light Emission ◽  
Short Review ◽  
Spectroscopic Properties ◽  
Triphenylphosphine Oxide ◽  
Complex Compounds ◽  
Mechanical Stimuli ◽  
Radiation Mechanism ◽  
Triphenylphosphine Complex ◽  
Available Information

Triboluminescence (TL) is a phenomenon of light emission resulting from the mechanical force applied to a substance. Although TL has been observed for many ages, the radiation mechanism is still under investigation. One of the exemplary compounds which possesses triboluminescent properties are copper(I) thiocyanate bipyridine triphenylphosphine complex [Cu(NCS)(py)2(PPh3)], europium tetrakis dibenzoylmethide triethylammonium EuD4TEA, tris(bipyridine)ruthenium(II) chloride [Ru(bpy)3]Cl2, and bis(triphenylphosphine oxide)manganese(II) bromide Mn(Ph3PO)2Br2. Due to the effortless synthesis route and distinct photo- and triboluminescent properties, these compounds may be useful model substances for the research on the triboluminescence mechanism. The advance of TL studies may lead to the development of a new group of sensors based on force-responsive (mechanical stimuli) materials. This review constitutes a comprehensive theoretical study containing available information about the coordination of metal complex synthesis methodologies with their physical, chemical, and spectroscopic properties.

scholarly journals Effects of Curcumin on Vessel Formation Insight into the Pro- and Antiangiogenesis of Curcumin

2019 ◽  
Vol 2019 ◽  
pp. 1-9 ◽  
Author(s):  
Ting-ye Wang ◽  
Jia-xu Chen
Keyword(s):  
Curcuma Longa ◽  
Scientific Evidence ◽  
Short Review ◽  
Dual Effect ◽  
Scientific Databases ◽  
Wide Range ◽  
Available Information ◽  
Insight Into

Curcumin is a compound extracted from the Curcuma longa L, which possesses a wide range of pharmacological effects. However, few studies have collected scientific evidence on its dual effect on angiogenesis. The present review gathered the fragmented information available in the literature to discuss the dual effect and possible mechanisms of curcumin on angiogenesis. Available information concerning the effect of curcumin on angiogenesis is compiled from scientific databases, including PubMed and Web of Science using the key term (curcumin and angiogenesis). The results were reviewed to identify relevant articles. Related literature demonstrated that curcumin has antiangiogenesis effect via regulating multiple factors, including proangiogenesis factor VEGF, MMPs, and FGF, both in vivo and in vitro, and could promote angiogenesis under certain circumstances via these factors. This paper provided a short review on bidirectional action of curcumin, which should be useful for further study and application of this compound that require further studies.

Luminescence and associated effector activity in Pyrosoma (Tunicata: Pyrosomida)

1978 ◽  
Vol 202 (1149) ◽  
pp. 483-495 ◽  
Keyword(s):  
Light Emission ◽  
Mechanical Stimuli ◽  
Luminescent Bacteria ◽  
Effector Activity

The behaviour, histology, and ciliary and luminescent responses of Pyrosoma tetrazooids are described. Each zooid contains paired luminous organs made up of large cells packed with organelles that are concluded to be intracellular luminescent bacteria. Light emission can be evoked by photic or mechanical stimuli, and is always preceded (with a latency of at least 600 ms) by arrests of the ciliary cells of the gill bars, and con­comitant ciliary arrest potentials. The gill bars are innervated by axons running under the ciliary cells; the luminous organs are not innervated. Ciliary arrests are evoked by photic stimuli and this appears to be the basis for transmission of light emission between zooids.

One-dimensional magnetic variety in a family of TTF-BIS-dithiolene metal complex compounds

Physica B+C ◽  
1977 ◽  
Vol 86-88 ◽  
pp. 655-656 ◽  
Author(s):  
I.S. Jacobs ◽  
H.R. Hart ◽  
L.V. Interrante ◽  
J.W. Bray ◽  
J.S. Kasper ◽  
...  
Keyword(s):  
Metal Complex ◽  
Complex Compounds ◽  
One Dimensional

scholarly journals Study of antihypoxic activities of metal complex selenium containing substances after their parenteral and enteralintroductions

2012 ◽  
Vol 10 (3) ◽  
pp. 28-34
Author(s):  
Denis Vladimirovich Sosin ◽  
Andrey Viktorovich Yevseyev ◽  
Edgar Andreyevich Parfenov ◽  
Vitaliy Andreyevich Pravdivtsev ◽  
Marina Anatolyevna Yevseyeva ◽  
...  
Keyword(s):  
Metal Complex ◽  
Hypobaric Hypoxia ◽  
Protective Action ◽  
Complex Compounds ◽  
Acute Hypobaric Hypoxia ◽  
Hypercapnic Hypoxia ◽  
First Time

In experiments on mice undergone to an acute hypercapnic hypoxia and an acute hypobaric hypoxia a screening of antihypoxants among new selenium containing metal complex substances was performed after their intra-abdominal and oral introductions. It was found that substances πQ1983 and πQ2170 on both models of hypoxia make the defensive effects surpassing actions well-known antihypoxants such as amthizole and bemythil. It was shown that antihypoxiс affects of studied substances depend on their caused hypothermia. For the first time the protective action of selenium containing metal complex compounds was demonstrated after their introduction per os.

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