scholarly journals Exchange-spring mechanism and Griffiths-like phase in room-temperature magnetoelectric Ni–BaTiO3 composites

2021 ◽  
Author(s):  
Ramany Revathy ◽  
Nandakumar Kalarikkal ◽  
Manoj Raama Varma ◽  
Kuzhichalil Peethambharan Surendran
Keyword(s):  
Room Temperature ◽  
First Report ◽  
Magnetoelectric Composites ◽  
Exchange Spring ◽  
Spring Mechanism

This is the first report on the occurrence of the exchange spring mechanism and a Griffiths-like phase in Ni–BaTiO3 magnetoelectric composites with 0–3 and 1–3 connectivity.

Organophotoredox-Catalyzed C–H Alkylation of Imidazoheterocycles with Malonates: Total Synthesis of Zolpidem

Synthesis ◽  
2020 ◽  
Author(s):  
Narendra R. Chaubey ◽  
Anant R. Kapdi ◽  
Biswanath Maity
Keyword(s):  
Total Synthesis ◽  
Room Temperature ◽  
Drug Molecule ◽  
Bond Functionalization ◽  
First Report ◽  
Mild Conditions ◽  
The Past ◽  
Hypnotic Drug ◽  
Free Environment

AbstractOrganophotocatalytic C–H bond functionalization has attracted a lot of attention in the past several years due to the possibility of catalyzing reactions in a metal- and peroxide-free environment. Continuing on these lines, an organophotoredox-catalyzed C–H functionalization of imidazo[1,2-a]pyridines and related heterocycles with bromomalonates under mild conditions is reported, providing excellent yields of the products at room temperature. This is the first report involving malonates as coupling partners leading to the synthesis of a range of functionalized products including total synthesis of zolpidem, a sedative­-hypnotic drug molecule.

Entangled exchange-spring magnetic structure driven by surface magnetic symmetry-breaking in Cr2O3 nanoparticles

2022 ◽  
Author(s):  
Natalia Rinaldi-Montes ◽  
Pedro Gorria ◽  
Antonio Benito Fuertes ◽  
David Martínez-Blanco ◽  
Zakariae Amghouz ◽  
...  
Keyword(s):  
Symmetry Breaking ◽  
Physical Properties ◽  
Magnetic Structure ◽  
Room Temperature ◽  
Spontaneous Magnetization ◽  
Electric Polarization ◽  
Exchange Spring ◽  
Cr2o3 Nanoparticles ◽  
Magnetic Symmetry ◽  
Electric Effect

Bulk Cr2O3 is an antiferromagnetic oxide that exhibits the magneto-electric effect at room temperature, with neither spontaneous magnetization nor net electric polarization. These physical properties stem from a subtle competition...

Exchange-spring mechanism of soft and hard ferrite nanocomposites

2013 ◽  
Vol 48 (8) ◽  
pp. 2871-2877 ◽  
Author(s):  
S. Manjura Hoque ◽  
C. Srivastava ◽  
V. Kumar ◽  
N. Venkatesh ◽  
H.N. Das ◽  
...  
Keyword(s):  
Exchange Spring ◽  
Spring Mechanism

Room‐Temperature Magnetoelectric Response in Molecular–Ionic Ferroelectric‐Based Magnetoelectric Composites

2020 ◽  
Vol 14 (3) ◽  
pp. 1900644 ◽  
Author(s):  
Dong Li ◽  
Xue-Mei Zhao ◽  
Hai-Xia Zhao ◽  
Yan-Ping Ren ◽  
La-Sheng Long ◽  
...  
Keyword(s):  
Room Temperature ◽  
Magnetoelectric Composites ◽  
Magnetoelectric Response

Enhancement of (BH)max in a hard-soft-ferrite nanocomposite using exchange spring mechanism

2009 ◽  
Vol 106 (7) ◽  
pp. 073902 ◽  
Author(s):  
Debangsu Roy ◽  
P. S. Anil Kumar
Keyword(s):  
Exchange Spring ◽  
Spring Mechanism ◽  
Soft Ferrite

The Observations of Paramagnetic Centers in Tellurite Glasses

1994 ◽  
Vol 373 ◽  
Author(s):  
J.D. Prohaska ◽  
J. Li ◽  
S. Kannan ◽  
E. Snitzer ◽  
J.S. Wang ◽  
...  
Keyword(s):  
Laser Radiation ◽  
Room Temperature ◽  
The Other ◽  
Tellurite Glasses ◽  
Hole Center ◽  
Paramagnetic Centers ◽  
First Report ◽  
Esr Spectrum ◽  
Radiation Induced

AbstractThis is the first report of ESR observations of three distinct paramagnetic centers in TeO29 glasses. One center is intrinsic to the glass and the other two are induced by KrFexcimer-laser radiation. The intrinsic center with a broad ESR spectrum is tentatively identified as an oxygen-associated hole center. One radiation-induced center fades slowly at room temperature; its proposed structure is that of an electron trapped in a diffuse orbital associated with a modifier ion. The other radiation-induced center is stable at room temperature and corresponds to the Vo· center observed in crystalline paratellurite.

scholarly journals First Report of Anthracnose Caused by Colletotrichum fragariae on Cyclamen in North Carolina

Plant Disease ◽  
2011 ◽  
Vol 95 (11) ◽  
pp. 1480-1480 ◽  
Author(s):  
B. Liu ◽  
M. Munster ◽  
C. Johnson ◽  
F. J. Louws
Keyword(s):  
North Carolina ◽  
Sequence Analysis ◽  
Room Temperature ◽  
Plant Diseases ◽  
Pathogenicity Test ◽  
Conidial Suspension ◽  
Disease Symptoms ◽  
First Report ◽  
Leaf Spots ◽  
Colletotrichum Fragariae

In November 2009, cyclamen (Cyclamen persicum) plants with disease symptoms from a commercial greenhouse operation in the western part of North Carolina were sent to the Plant Diseases and Insect Clinic at North Carolina State University. Symptoms consisted of coalescing reddish and tan necrotic leaf spots with concentric circles. Other symptoms included darkened vascular tissue and decay of the corm, large roots, and petioles. Diseased leaves and stems were surface sterilized in 0.5% sodium hypochlorite for 3 min, air dried, and placed in petri dishes containing alkaline water agar. After 3 days of incubation at room temperature, fungal colonies were transferred to acidified potato dextrose agar. Isolation frequency after 5 days was 33% (three of nine pieces) and 16% (one of six pieces) from small leaf spots and petioles, respectively. Pure cultures of isolates were gray and black with abundant, aerial, gray whitish mycelia. Diseased plants were also incubated in a moist chamber at room temperature and sporulation was observed within 7 days. Conidia were tapered with rounded ends and produced in the acervulus and on the tips of setae, which is consistent with the morphology of described isolates of Colletotrichum fragariae. Similar setae were also observed directly on the fine roots of the original sample. The pathogenicity of single-spore cultures was tested by spraying four 2-month-old cyclamen plants with a conidial suspension (106 conidia/ml) and the plants were kept in a humid chamber for 24 h. Noninoculated controls (four plants) were sprayed with distilled water and subjected to the same conditions. The pathogenicity test was also repeated. Inoculated plants and controls were placed in a greenhouse with a temperature range from 22 to 25°C. After 7 to 10 days, symptomatic leaves and stems were observed on all the inoculated plants but not on the control plants. Fungi reisolated from 10 symptomatic leaf tissues had identical morphological features as the original isolates. Fungal DNA was extracted with DNeasy Plant Mini DNA Extraction Kits following the manufacturer's protocol (Qiagen Inc., Valencia, CA). Sequence analysis of the rRNA internal transcribed spacer (ITS) region of the cyclamen isolate (GenBank Accession No. HQ188923), based on the fragment amplified with ITS1 and ITS4 primers, showed 100% similarity to isolates of C. fragariae deposited in GenBank (Accession Nos. FJ172290 [ATCC MYA-4443 from cyclamen] and FJ810510 [ATCC MYA-4442 from silver date palm]) and Florida isolate C16 isolated from strawberry (1). In addition, the morphology and ITS sequences of the cyclamen isolate were identical to those of the C. fragariae voucher isolate from strawberry (GU174546). Results from disease symptoms, colony and spore morphology, pathogenicity tests, and ITS sequence analysis suggest that C. fragariae was the pathogen responsible for the disease symptoms on cyclamens. To our knowledge, this is the first report of a disease caused by C. fragariae on cyclamen in North Carolina and complements an earlier report from Florida (1). Reference: (1) S. J. MacKenzie et al. Plant Dis. 92:1432, 2008.

First report on a FeS-based 2 V operating flexible solid-state symmetric supercapacitor device

2017 ◽  
Vol 1 (6) ◽  
pp. 1366-1375 ◽  
Author(s):  
Swapnil S. Karade ◽  
Pratibha Dwivedi ◽  
Sutripto Majumder ◽  
Bidhan Pandit ◽  
Babasaheb R. Sankapal
Keyword(s):  
Thin Film ◽  
Solid State ◽  
Room Temperature ◽  
Silar Method ◽  
First Report ◽  
Layer Adsorption ◽  
Symmetric Supercapacitor ◽  
Ionic Layer

Device grade application of FeS thin film deposited by successive ionic layer adsorption and reaction (SILAR) method at room temperature.

scholarly journals Organophotoredox-Catalyzed Direct C-H Functionalization of “Drug Prejudice” at Room Temperature

2020 ◽  
Author(s):  
Narendra Chaubey ◽  
Anant Kapdi ◽  
Biswanath Maity
Keyword(s):  
Room Temperature ◽  
Bond Functionalization ◽  
First Report ◽  
Metal Free ◽  
Mild Conditions ◽  
The Past ◽  
Free Environment

<p>Organophotocatalytic C─H bond functionalization has attracted lot of attention in the past several years due to the possibility of catalysing reactions in a metal-free environment. Continuing on these lines, we repot herein an organophotoredox catalyzed C─H functionalization of imidazo[1,2-a]pyridines and related heterocycles with malonates under mild conditions providing excellent yields of the products at room temperature. Although, C─3 functionalization of imidazo[1,2-a]pyridines are known, this is the first report involving malonates as coupling partners leading to the synthesis of a range of functionalized products including Zolpidem, a sedative-hypnotic medicine. </p>

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