scholarly journals INTERACTION OF VECTOR MESONS WITH BARYONS AND NUCLEI

2012 ◽  
Vol 21 (11) ◽  
pp. 1230011 ◽  
Author(s):  
E. OSET ◽  
A. RAMOS ◽  
E. J. GARZON ◽  
R. MOLINA ◽  
L. TOLOS ◽  
...  
Keyword(s):  
Short Review ◽  
Vector Mesons ◽  
Baryon Interaction ◽  
Charm Baryon ◽  
Recent Developments ◽  
Photo Production ◽  
Modern Perspective

After some short introductory remarks on particular issues on the vector mesons in nuclei, in this paper, we present a short review of recent developments concerning the interaction of vector mesons with baryons and with nuclei from a modern perspective using the local hidden gauge formalism for the interaction of vector mesons. We present results for the vector–baryon interaction and in particular for the resonances which appear as composite states, dynamically generated from the interaction of vector mesons with baryons, taking also the mixing of these states with pseudoscalars and baryons into account. We then venture into the charm sector, reporting on hidden charm baryon states around 4400 MeV, generated from the interaction of vector mesons and baryons with charm, which have a strong repercussion on the properties of the J/ΨN interaction. We also address the interaction of K* with nuclei and make suggestions to measure the predicted huge width in the medium by means of transparency ratio. The formalism is extended to study the phenomenon of J/ψ suppression in nuclei via J/ψ photo-production reactions.

Recent Developments in C–C Bond Formation Using Catalytic Reductive Coupling Strategies

Synthesis ◽  
2020 ◽  
Vol 52 (18) ◽  
pp. 2623-2638
Author(s):  
Joshua D. Sieber ◽  
Toolika Agrawal
Keyword(s):  
Bond Formation ◽  
Cross Coupling ◽  
Short Review ◽  
Reductive Coupling ◽  
Recent Developments ◽  
Molecular Complexity ◽  
Metal Catalyzed ◽  
Coupling Processes ◽  
Coupling Strategies

Metal-catalyzed reductive coupling processes have emerged as a powerful methodology for the introduction of molecular complexity from simple starting materials. These methods allow for an orthogonal approach to that of redox-neutral strategies for the formation of C–C bonds by enabling cross-coupling of starting materials not applicable to redox-neutral chemistry. This short review summarizes the most recent developments in the area of metal-catalyzed reductive coupling utilizing catalyst turnover by a stoichiometric reductant that becomes incorporated in the final product.1 Introduction2 Ni Catalysis3 Cu Catalysis4 Ru, Rh, and Ir Catalysis4.1 Alkenes4.2 1,3-Dienes4.3 Allenes4.4 Alkynes4.5 Enynes5 Fe, Co, and Mn Catalysis6 Conclusion and Outlook

scholarly journals Quaternary Misfit Compounds—A Concise Review

Crystals ◽  
2020 ◽  
Vol 10 (6) ◽  
pp. 468
Author(s):  
Sokhrab B. Aliev ◽  
Reshef Tenne
Keyword(s):  
Irrational Number ◽  
Short Review ◽  
Layered Compounds ◽  
Layered Compound ◽  
Charge Carrier Density ◽  
Precise Control ◽  
Rocksalt Structure ◽  
Main Emphasis ◽  
Recent Developments ◽  
Metal Dichalcogenides

Misfit layered compounds (MLCs) have been studied in the literature for the last 40 years. They are generally made of an alternating sequence of two monolayers, a distorted rocksalt structure, and a hexagonal layered compound. In a typical MLC, the c-axis is common to the two monolayers and so is one of the axes in the layer plan. However, the two compounds are non-commensurate along at least one axis, and the ratio between the two axes is an irrational number making the MLC a non-stoichiometric compound. The two main families of MLC are those based on metal dichalcogenides and CoO2 as the hexagonal layered compound. Traditionally, ternary MLCs were prepared and studied, but some quaternary and multinary MLC minerals have been known for many years. Over the last few years, interest in MLCs with four and even larger number of atoms has grown. Doping or alloying of a ternary MLC permits precise control of the charge carrier density and hence the electrical, thermoelectric, catalytic, and optical properties of such compounds. In this short review, some of these developments will be discussed with the main emphasis put on quaternary MLC nanotubes belonging to the chalcogenide series. The synthesis, structural characterization, and some of their properties are considered. Some recent developments in quaternary cobaltite MLCs and recent studies on exfoliated MLCs are discussed as well.

scholarly journals THE INTERFACE OF COSMOLOGY WITH STRING AND M(ILLENNIUM) THEORY

2001 ◽  
Vol 16 (30) ◽  
pp. 4803-4843 ◽  
Author(s):  
DAMIEN A. EASSON
Keyword(s):  
Early Universe ◽  
Extra Dimensions ◽  
Large Extra Dimensions ◽  
Short Review ◽  
Big Bang ◽  
Space Time ◽  
String Cosmology ◽  
Brane World ◽  
Recent Developments ◽  
M Theory

The purpose of this review is to discuss recent developments occurring at the interface of cosmology with string and M theory. We begin with a short review of 1980s string cosmology and the Brandenberger–Vafa mechanism for explaining space–time dimensionality. It is shown how this scenario has been modified to include the effects of p-brane gases in the early universe. We then introduce the Pre-Big-Bang scenario (PBB), Hořava–Witten heterotic M theory and the work of Lukas, Ovrut and Waldram, and end with a discussion of large extra dimensions, the Randall–Sundrum model and Brane World cosmologies.

scholarly journals A Short Review on Recent Developments in TMD Factorization and Implementation

2019 ◽  
Vol 2019 ◽  
pp. 1-17 ◽  
Author(s):  
Ignazio Scimemi
Keyword(s):  
Transverse Momentum ◽  
Perturbative Qcd ◽  
Short Review ◽  
Transverse Momentum Dependent ◽  
Recent Developments

In the latest years the theoretical and phenomenological advances in the factorization of several collider processes using the transverse momentum dependent distributions (TMD) have greatly increased. I attempt here a short resume of the newest developments discussing also the most recent perturbative QCD calculations. The work is not strictly directed to experts in the field and it wants to offer an overview of the tools and concepts which are behind the TMD factorization and evolution. I consider both theoretical and phenomenological aspects, some of which have still to be fully explored. It is expected that actual colliders and the Electron Ion Collider (EIC) will provide important information in this respect.

FROM RELATIVISTIC VECTOR MESONS IN CONSTANT MAGNETIC FIELDS TO NONRELATIVISTIC (PSEUDO)SUPERSYMMETRIES

1995 ◽  
Vol 10 (19) ◽  
pp. 2783-2797 ◽  
Author(s):  
J. BECKERS ◽  
N. DEBERGH
Keyword(s):  
Magnetic Field ◽  
Quantum Mechanics ◽  
Magnetic Fields ◽  
Constant Magnetic Field ◽  
Vector Mesons ◽  
One Dimensional ◽  
Recent Developments

Results coming from the study of relativistic vector mesons interacting with a constant magnetic field are examined through Johnson-Lippmann implications on one-dimensional oscillatorlike systems. We obtain specific nonrelativistic Hamiltonians showing new properties in quantum mechanics and leading to superpositions of bosons and pseudofermions. Moreover, two “potentials” are introduced and discussed in comparison with recent developments usually obtained in p=2 parasupersymmetric quantum mechanics. Pseudofermions are also examined, particularly with respect to orthofermions.

scholarly journals HLA Expression at the Maternal-Fetal Interface

1998 ◽  
Vol 6 (3-4) ◽  
pp. 197-204 ◽  
Author(s):  
Heinz Hutter ◽  
Astrid Hammer ◽  
Gottfried Dohr ◽  
Joan S. Hunt
Keyword(s):  
Immune System ◽  
Hla Class I ◽  
Short Review ◽  
Maternal Blood ◽  
Protective Mechanisms ◽  
Hla Class I Molecules ◽  
Recent Developments ◽  
The Subject ◽  
Class Ii Antigens ◽  
Maternal Fetal Interface

Pregancy in the human presents an “immunological paradox,” because of the unexpected willingness of mothers to accept genetically disparate tissues. The fact that the fetus can develop unharmed for nine months shows that protective mechanisms must exist to permit its survival. The conditions that permit the genetically dissimilar human fetus to evade rejection by its mother's immune system have been the subject of intense interest for several decades. As the placental cells, which are in contact with maternal blood or tissue, are devoid of HLA class II antigens, interest has focused on the expression of HLA class molecules. Recent developments in the constitutive, transcriptional, and translational expression of HLA class I molecules on anatomically and morphologically different subpopulations of trophoblast cells will form the basis of this short review.

Recent developments and key barriers to advanced biofuels: A short review

2018 ◽  
Vol 257 ◽  
pp. 320-333 ◽  
Author(s):  
You-Kwan Oh ◽  
Kyung-Ran Hwang ◽  
Changman Kim ◽  
Jung Rae Kim ◽  
Jin-Suk Lee
Keyword(s):  
Short Review ◽  
Advanced Biofuels ◽  
Recent Developments

scholarly journals Recent advances in the rational synthesis and self-assembly of anisotropic plasmonic nanoparticles

2018 ◽  
Vol 90 (9) ◽  
pp. 1393-1407 ◽  
Author(s):  
Leonardo Scarabelli
Keyword(s):  
Self Assembly ◽  
Rational Design ◽  
Short Review ◽  
Cascade Reactions ◽  
Full Potential ◽  
Plasmonic Materials ◽  
Optical And Electronic Properties ◽  
Complex Architectures ◽  
Recent Developments ◽  
Surface Chemistries

Abstract The field of plasmonics has grown at an incredible pace in the last couple of decades, and the synthesis and self-assembly of anisotropic plasmonic materials remains highly dynamic. The engineering of nanoparticle optical and electronic properties has resulted in important consequences for several scientific fields, including energy, medicine, biosensing, and electronics. However, the full potential of plasmonics has not yet been realized due to crucial challenges that remain in the field. In particular, the development of nanoparticles with new plasmonic properties and surface chemistries could enable the rational design of more complex architectures capable of performing advanced functions, like cascade reactions, energy conversion, or signal transduction. The scope of this short review is to highlight the most recent developments in the synthesis and self-assembly of anisotropic metal nanoparticles, which are capable of bringing forward the next generation of plasmonic materials.

Recent Advances in the Synthesis and Chemistry of Nitronates

Synthesis ◽  
2017 ◽  
Vol 49 (15) ◽  
pp. 3255-3268 ◽  
Author(s):  
Andrey Tabolin ◽  
Alexey Sukhorukov ◽  
Sema Ioffe ◽  
Alexander Dilman
Keyword(s):  
Carbon Atom ◽  
Stereoselective Synthesis ◽  
Building Blocks ◽  
Short Review ◽  
Bioactive Molecules ◽  
Silyl Nitronates ◽  
Recent Advances ◽  
Recent Developments

Due to their availability and versatile reactivity, nitronates have become important building blocks in the stereoselective synthesis of bioactive molecules. This short review provides a summary of recent developments on the synthesis, chemistry and applications of O-alkyl and O-silyl nitronates.1 Introduction2 Approaches to the Synthesis of Nitronates2.1 Synthesis of Six-Membered Cyclic Nitronates2.1.1 Formal [4+2] Approaches2.1.2 Formal [3+3] Approaches2.1.3 Other Approaches2.2 Synthesis of Five-Membered Cyclic Nitronates2.2.1 Formal [3+2] Approaches2.2.2 Formal [4+1] Approaches2.2.3 Oxidation Approaches3 Chemistry of Nitronates3.1 Nitronates as α-C-Nucleophiles3.2 Nitronates as α-C-Electrophiles3.3 Nitronates in [3+n]-Annulation Reactions3.4 Reactions Involving the β-Carbon Atom of Nitronates3.5 Miscellaneous Transformations4 Conclusion

scholarly journals Recent Developments in Nanoporous Graphene Membranes for Organic Solvent Nanofiltration: A Short Review

Membranes ◽  
2021 ◽  
Vol 11 (10) ◽  
pp. 793
Author(s):  
Yoon-Tae Nam ◽  
Junhyeok Kang ◽  
Jaedong Jang ◽  
Jun-Hyuk Bae ◽  
Hee-Tae Jung ◽  
...  
Keyword(s):  
Organic Solvent ◽  
Structural Characteristics ◽  
Single Layer ◽  
Composite Membranes ◽  
Short Review ◽  
Size Exclusion ◽  
Recent Developments ◽  
Nanoporous Graphene ◽  
Organic Solvent Nanofiltration ◽  
Molecular Sieving

Graphene-based membranes are promising candidates for efficient organic solvent nanofiltration (OSN) processes because of their unique structural characteristics, such as mechanical/chemical stability and precise molecular sieving. Recently, to improve organic solvent permeance and selectivity, nanopores have been fabricated on graphene planes via chemical and physical methods. The nanopores serve as an additional channel for facilitating ultrafast solvent permeation while filtering organic molecules by size exclusion. This review summarizes the recent developments in nanoporous graphene (NG)-based membranes for OSN applications. The membranes are categorized depending on the membrane structure: single-layer NG, multilayer NG, and graphene-based composite membranes hybridized with other porous materials. Techniques for nanopore generation on graphene, as well as the challenges faced and the perspectives required for the commercialization of NG membranes, are also discussed.

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