Spin-isospin excitations in the medium-mass nucleus Co58 investigated with the (d,2He) reaction

2005 ◽  
Vol 71 (1) ◽  
Author(s):  
M. Hagemann ◽  
C. Bäumer ◽  
A. van den Berg ◽  
D. De Frenne ◽  
D. Frekers ◽  
...  
Keyword(s):  
Medium Mass ◽  
Medium Mass Nucleus ◽  
Mass Nucleus

scholarly journals Untargeted Metabolomics Approach for the Discovery of Environment-Related Pyran-2-ones Chemodiversity in a Marine-Sourced Penicillium restrictum

Marine Drugs ◽  
2021 ◽  
Vol 19 (7) ◽  
pp. 378
Author(s):  
Van-Tuyen Le ◽  
Samuel Bertrand ◽  
Thibaut Robiou du Pont ◽  
Fabrice Fleury ◽  
Nathalie Caroff ◽  
...  
Keyword(s):  
Culture Medium ◽  
Blue Mussel ◽  
Culture Media ◽  
Principal Component ◽  
Chemical Diversity ◽  
Untargeted Metabolomics ◽  
High Chemical ◽  
Medium Mass ◽  
Metabolomics Study ◽  
Penicillium Restrictum

Very little is known about chemical interactions between fungi and their mollusc host within marine environments. Here, we investigated the metabolome of a Penicillium restrictum MMS417 strain isolated from the blue mussel Mytilus edulis collected on the Loire estuary, France. Following the OSMAC approach with the use of 14 culture media, the effect of salinity and of a mussel-derived medium on the metabolic expression were analysed using HPLC-UV/DAD-HRMS/MS. An untargeted metabolomics study was performed using principal component analysis (PCA), orthogonal projection to latent structure discriminant analysis (O-PLSDA) and molecular networking (MN). It highlighted some compounds belonging to sterols, macrolides and pyran-2-ones, which were specifically induced in marine conditions. In particular, a high chemical diversity of pyran-2-ones was found to be related to the presence of mussel extract in the culture medium. Mass spectrometry (MS)- and UV-guided purification resulted in the isolation of five new natural fungal pyran-2-one derivatives—5,6-dihydro-6S-hydroxymethyl-4-methoxy-2H-pyran-2-one (1), (6S, 1’R, 2’S)-LL-P880β (3), 5,6-dihydro-4-methoxy-6S-(1’S, 2’S-dihydroxy pent-3’(E)-enyl)-2H-pyran-2-one (4), 4-methoxy-6-(1’R, 2’S-dihydroxy pent-3’(E)-enyl)-2H-pyran-2-one (6) and 4-methoxy-2H-pyran-2-one (7)—together with the known (6S, 1’S, 2’S)-LL-P880β (2), (1’R, 2’S)-LL-P880γ (5), 5,6-dihydro-4-methoxy-2H-pyran-2-one (8), (6S, 1’S, 2’R)-LL-P880β (9), (6S, 1’S)-pestalotin (10), 1’R-dehydropestalotin (11) and 6-pentyl-4-methoxy-2H-pyran-2-one (12) from the mussel-derived culture medium extract. The structures of 1-12 were determined by 1D- and 2D-MMR experiments as well as high-resolution tandem MS, ECD and DP4 calculations. Some of these compounds were evaluated for their cytotoxic, antibacterial, antileishmanial and in-silico PTP1B inhibitory activities. These results illustrate the utility in using host-derived media for the discovery of new natural products.

scholarly journals Possibility of C14 cluster as a building block of medium-mass nuclei

2020 ◽  
Vol 101 (3) ◽  
Author(s):  
N. Itagaki ◽  
A. V. Afanasjev ◽  
D. Ray
Keyword(s):  
Building Block ◽  
Medium Mass

scholarly journals Pairing collectivity in medium-mass neutron-rich nuclei near drip-line

2007 ◽  
Vol 788 (1-4) ◽  
pp. 307-315 ◽  
Author(s):  
M. Matsuo ◽  
Y. Serizawa ◽  
K. Mizuyama
Keyword(s):  
Drip Line ◽  
Medium Mass

Moments of inertia and B(E2;01+→21+)s in the NpNn scheme

2015 ◽  
Vol 93 (7) ◽  
pp. 711-715
Author(s):  
Rajesh Kumar ◽  
S. Sharma
Keyword(s):  
Nuclear Structure ◽  
Strong Dependence ◽  
Moment Of Inertia ◽  
Nucleon Pair ◽  
Valence Nucleon ◽  
Moments Of Inertia ◽  
Ground Band ◽  
Neutron Interaction ◽  
Medium Mass

We examine the collective nuclear structure of light and medium mass (Z = 50–82, N = 82–126) even–even nuclei using valence nucleon pair product (NpNn). We discuss the role of proton–neutron interaction in light mass nuclei and illustrate the variation of observables of collectivity and deformation (i.e., ground band moment of inertia) and B(E2) values with N and NpNn). The plot of these observables against NpNn vividly displays the formation of isotonic multiplets in quadrant I, strong dependence on NpNn in quadrant II and weak constancy with Z in quadrant III is illustrated.

Damped reactions in medium mass nuclei

1989 ◽  
Vol 229 (1-2) ◽  
pp. 25-28 ◽  
Author(s):  
P.M. Evans ◽  
A.E. Smith ◽  
C.N. Pass ◽  
L. Stuttgé ◽  
R.R. Betts ◽  
...  
Keyword(s):  
Medium Mass

Di-neutron correlations in medium-mass neutron-rich nuclei near the dripline

2005 ◽  
Vol 25 (S1) ◽  
pp. 563-565
Author(s):  
M. Matsuo ◽  
K. Mizuyama ◽  
Y. Serizawa
Keyword(s):  
Medium Mass
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