Solution behavior and magnetic properties of a novel nonanuclear copper(ii) cluster

2018 ◽  
Vol 42 (22) ◽  
pp. 17884-17888 ◽  
Author(s):  
Bao-Qian Ji ◽  
Marko Jagodič ◽  
Hui-Yan Ma ◽  
Hai-Feng Su ◽  
Yun-Wu Li ◽  
...  
Keyword(s):  
Magnetic Properties ◽  
Solution Behavior ◽  
Cluster Chemistry ◽  
Esi Ms ◽  
Assembly Mechanism ◽  
First Time ◽  
Solution Behaviour

A {Cu9} nanocluster was constructed from a new multidentate pyrazole–alcohol ligand and various small sterically-hindering anions. The ESI-MS was for the first time applied to Cu cluster chemistry to detect the solution behaviour and possible assembly mechanism of the {Cu9} cluster. The cluster also exhibited antiferromagnetic behaviour.

ON THE PROCESSING OF HEMATITE RAW MATERIALS AT THE KRYVOROZHSK MINING AND PROCESSING PLANT OF OXIDIZED ORE ON TECHNOLOGY OF DIRECT RECOVERY ITmk3

2018 ◽  
pp. 32-37
Author(s):  
P.I. Loboda ◽  
Younes Razaz ◽  
S. Grishchenko
Keyword(s):  
Magnetic Properties ◽  
Cast Iron ◽  
Iron Content ◽  
Raw Materials ◽  
Direct Reduction ◽  
Processing Plant ◽  
High Iron Content ◽  
High Iron ◽  
Direct Restoration ◽  
First Time

Purpose. To substantiate the efficiency of processing hematite raw materials at the Krivoy Rog Mining and Processing Plant of Oxidized Ores using the direct reduction technology itmk3®. Metodology. Analysis of the results of the itmk3® direct restoration technology developed by Kobe Steel Ltd., Japan and Hares Engineering GmbX, Austria, with a view to using it to process Krivbass hematite ores into granulated iron (so-called “nuggets”). Findings. The involvement in the production of hematite ores (oxidized quartzite) of Krivbass with high iron content, but with low magnetic properties for their processing into granular cast iron is grounded. Originality. The use of itmk3® direct reduction technology from Kobe Steel Ltd., Japan and Hares Engineering GmbH, Austria for the processing of Krivbass hematite ores into granular cast iron is justified for the first time. Practical value. The efficiency of the use of hematite ores (oxidized quartzite) has been substantiated, which can significantly reduce the costs in the mining cycle for the economical production of metallurgical products.

Two Decanuclear DyIIIxCoII10–x (x = 2, 4) Nanoclusters: Structure, Assembly Mechanism, and Magnetic Properties

2021 ◽  
Vol 60 (7) ◽  
pp. 4904-4914
Author(s):  
Shui Yu ◽  
Hai-Ling Wang ◽  
Zilu Chen ◽  
Hua-Hong Zou ◽  
Huancheng Hu ◽  
...  
Keyword(s):  
Magnetic Properties ◽  
Assembly Mechanism ◽  
Structure Assembly

Flavon- and Flavonolglycosides from Achillea pannonica Scheele

2001 ◽  
Vol 56 (7-8) ◽  
pp. 521-525 ◽  
Author(s):  
Denata Kasaj ◽  
Liselotte Krenn ◽  
Sonja Prinz ◽  
Antje Hüfner ◽  
Shi Shan Yuc ◽  
...  
Keyword(s):  
Methanolic Extract ◽  
2D Nmr ◽  
Flavonoid Glycosides ◽  
Spectroscopic Methods ◽  
Esi Ms ◽  
Aerial Parts ◽  
Nmr Techniques ◽  
Chemotaxonomic Study ◽  
First Time ◽  
C Nmr

The detailed investigation of a methanolic extract of aerial parts of Achillea pannonica SCHEELE. within a chemotaxonomic study led to the isolation of 6 flavonoid glycosides. Besides rutin, apigenin-7-O-glucopyranoside, luteolin-7-O-glucopyranoside, apigenin-7-O-rutinoside and acacetin-7-O-rutinoside, an unusual flavondiglucoside was isolated. Its structure was established by UV, 1HNMR and 13C NMR spectroscopic methods including 2D-NMR techniques and ESI-MS as luteolin-7,4′-O-β-diglucoside. This substance is reported for the first time in the genus Achillea. Chemotaxonomic aspects are discussed briefly

scholarly journals Structural, Superconducting and Magnetic Properties of La3-XRxNi2B2N3-δ with R = Ce, Pr, Nd

2011 ◽  
Vol 170 ◽  
pp. 165-169 ◽  
Author(s):  
Tahir Ali ◽  
Ernst Bauer ◽  
Gerfried Hilscher ◽  
Herwig Michor
Keyword(s):  
Magnetic Properties ◽  
Structure Type ◽  
The Body ◽  
Spin Reorientation ◽  
Superconducting Transition ◽  
X Ray Diffraction ◽  
Range Magnetic Order ◽  
Long Range Magnetic Order ◽  
First Time ◽  
Magnetic Pair

We report on structural and superconducting properties of La3-xRxNi2B2N3- where La is substituted by the magnetic rare-earth elements Ce, Pr, Nd. The compounds Pr3Ni2B2N3- and Nd3Ni2B2N3- are characterized for the first time. Powder X-ray diffraction confirmed all samples R3Ni2B2N3- with R = La, Ce, Pr, Nd and their solid solutions to crystallize in the body centered tetragonal La3Ni2B2N3 structure type. Superconducting and magnetic properties of La3-xRxNi2B2N3- were studied by resistivity, specific heat and susceptibility measurements. While La3Ni2B2N3- has a superconducting transition temperature Tc ~ 14 K, substitution of La by Ce, Pr, and Nd leads to magnetic pair breaking and, thus, to a gradual suppression of superconductivity. Pr3Ni2B2N3- exibits no long range magnetic order down to 2 K, Nd3Ni2B2N3- shows ferrimagnetic ordering below TC =17 K and a spin reorientation transition to a nearly antiferromagnetic state at 10 K.

scholarly journals Array of Metabolites in Italian Hericium erinaceus Mycelium, Primordium, and Sporophore

Molecules ◽  
2019 ◽  
Vol 24 (19) ◽  
pp. 3511 ◽  
Author(s):  
Federica Corana ◽  
Valentina Cesaroni ◽  
Barbara Mannucci ◽  
Rebecca Michela Baiguera ◽  
Anna Maria Picco ◽  
...  
Keyword(s):  
Dietary Supplements ◽  
Bioactive Compounds ◽  
Medicinal Mushroom ◽  
Wild Type ◽  
Hericium Erinaceus ◽  
Esi Ms ◽  
Therapeutic Properties ◽  
Erinacine A ◽  
First Time

Hericium erinaceus is a medicinal mushroom that contains many molecules promising a plethora of therapeutic properties. In this study, the strain H.e.2 (MicUNIPV, University of Pavia, Italy) was isolated from a sporophore collected in Tuscany (Italy). Mycelium, primordium, and wild type and cultivated sporophores were analyzed by HPLC-UV-ESI/MS. Erinacine A in the mycelium and hericenones C and D in the sporophores were quantified by comparison with their standard molecules. For the first time, H. erinaceus primordium was also investigated for the presence of these molecules. Comparing with the literature data, hericenes, molecules structurally similar to hericenones, were present in all our samples. The highest contents of hericenones C and D were detected in cultivated sporophores, compared to the wild type. The comparison of these data with those of another Italian H. erinaceus strain (H.e.1 MicUNIPV) was discussed. The results led us to select H. erinaceus strains more suitable for mycelium production or sporophore cultivation to obtain extracts with a higher content of bioactive compounds. This work provides a further step towards standardizing the procedures in the development of dietary supplements made from mushrooms.

Structure and magnetic properties of (Fe2O3)n clusters (n = 1–5)

2014 ◽  
Vol 16 (48) ◽  
pp. 26421-26426 ◽  
Author(s):  
A. Erlebach ◽  
C. Hühn ◽  
R. Jana ◽  
M. Sierka
Keyword(s):  
Magnetic Properties ◽  
Global Minimum ◽  
Size Range ◽  
Weak Dependence ◽  
Relative Stabilities ◽  
Magnetic States ◽  
First Time

Global minimum structures of (Fe2O3)n clusters (n = 1–5) determined for the first time in this size range show weak dependence of the structure and relative stabilities of different isomers on their magnetic states.

Ferromagnetic Properties of Spark-Processed Photoluminescing Silicon

1996 ◽  
Vol 452 ◽  
Author(s):  
J. Hack ◽  
M. H. Ludwig ◽  
W. Geerts ◽  
R. E. Hummel
Keyword(s):  
Magnetic Properties ◽  
High Purity ◽  
Paramagnetic Centers ◽  
Bulk Silicon ◽  
High Concentration ◽  
Temperature Dependent ◽  
Paramagnetic Resonance ◽  
Ultra High Purity ◽  
Ferromagnetic Ordering ◽  
First Time

AbstractMagnetic properties of photoluminescing spark-processed silicon (sp-Si) have been investigated for the first time. Contrary to the diamagnetic signal known for bulk silicon, sp-Si displays a paramagnetic resonance as well as a ferromagnetic hysterisis loop. The paramagnetic resonance was studied using an EPR system and showed a high concentration of at least two distinct paramagnetic centers. One center can be eliminated by annealing in Ultra-High Purity nitrogen for 30 minutes at 600 °C. Measurements utilizing a SQUID magnetometer revealed that sp-Si displays ferromagnetic ordering with a saturization magnetization occuring at low fields. This is attributed to the high density of paramagnetic centers. Temperature dependent measurements were performed to establish possible links between magnetic properties and the luminescence of sp-Si.

Application of ion pair chromatography coupled with mass spectrometry to assess antisense oligonucleotides concentrations in living cells

The Analyst ◽  
2019 ◽  
Vol 144 (2) ◽  
pp. 622-633 ◽  
Author(s):  
Sylwia Studzińska ◽  
Piotr Cywoniuk ◽  
Krzysztof Sobczak
Keyword(s):  
Mass Spectrometry ◽  
Antisense Oligonucleotides ◽  
Living Cells ◽  
Ion Pair ◽  
Total Rna ◽  
Esi Ms ◽  
Ion Pair Chromatography ◽  
First Time

UHPLC ESI-MS/MS was used for the first time in the analysis of antisense oligonucleotides in total RNA extracts.

scholarly journals Constituents of Da-Cheng-Qi Decoction and its Parent Herbal Medicines Determined by LC-MS/MS

2010 ◽  
Vol 5 (5) ◽  
pp. 1934578X1000500
Author(s):  
Fengguo Xu ◽  
Ying Liu ◽  
Rui Song ◽  
Haijuan Dong ◽  
Zunjian Zhang
Keyword(s):  
High Performance ◽  
Herbal Medicines ◽  
Gradient Elution ◽  
High Performance Liquid Chromatographic ◽  
Reversed Phase ◽  
Esi Ms ◽  
Chemical Constitution ◽  
Tandem Mass Spectrometric ◽  
Liquid Chromatographic ◽  
First Time

Da-Cheng-Qi decoction (DCQD) is a purgative prescription used in China and East Asia. To profile the constituents of this complex traditional Chinese medicine (TCM), a high-performance liquid chromatographic, electrospray ionization, tandem mass spectrometric (HPLC-ESI/MS/MS) analytical method was developed. After separation on a reversed-phase C18 analytical column using gradient elution, samples were analyzed by ESI-MS/MS in negative mode. As a result, a total of 37 compounds were detected, of which two tannins, three anthraquinones, two sennosides, five flavonoids and two lignans were unambiguously identified by comparison with standard compounds, and sixteen compounds were either tentatively identified or deduced according to their MS/MS data. The fragmentation pathways of many of the observed compounds, such as the tannins and lignans are reported for the first time. In addition, the identity of each peak in DCQD was explored by comparison with those of its three constituent herbs. The results indicated that tannins, anthraquinones and sennosides in DCQD originated from Radix et Rhizoma Rhei, flavonoids from Fructus Aurantii Immaturus, and lignans from Cortex Magnoliae officinalis. The present study provides an example of chemical constitution profiling in complex TCM systems using LC/MS/MS.

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