scholarly journals Higgs inflation and its extensions and the further refining dS swampland conjecture

2021 ◽  
Vol 81 (12) ◽  
Author(s):  
Yang Liu
Keyword(s):  
Scalar Potential ◽  
Cosmological Parameters ◽  
The Other ◽  
De Sitter ◽  
Inflation Model ◽  
Link Type ◽  
Second Derivatives ◽  
The One ◽  
Derivatives Of ◽  
Inflationary Models

AbstractOn the one hand, Andriot and Roupec (Fortsch Phys, 1800105, 2019) proposed an alternative refined de Sitter conjecture, which gives a natural condition on a combination of the first and second derivatives of the scalar potential (Andriot and Roupec 2019). On the other hand, in our previous article (Liu in Eur Phys J Plus 136:901, 2021) , we have found that Palatini Higgs inflation model is in strong tension with the refined de Sitter swampland conjecture (Liu 2021). Therefore, following our previous research, in this article we examine if Higgs inflation model and its two variations: Palatini Higgs inflation and Higgs-Dilaton model (Rubio in Front Astron Space Sci, 10.3389/fspas.2018.00050, 2019) can satisfy the “further refining de Sitter swampland conjecture” or not. Based on observational data (Ade et al., Phys Rev Lett 121:221301, 2018; Akrami et al., Planck 2018 results. X. Constraints on inflation, arXiv:1807.06211 [astro-ph.CO], 2018; Aghanim et al., Planck 2018 results: VI. Cosmological parameters, arXiv:1807.06209 [astro-ph.CO], 2018), we find that these three inflationary models can always satisfy this new swampland conjecture if only we adjust the relevant parameters a, $$b = 1-a$$ b = 1 - a and q. Therefore, if the “further refining de Sitter swampland conjecture” does indeed hold, then the three inflationary models might all be in “landscape”.

Polyhedral boron derivatives of porphyrins and phthalocyanines

2001 ◽  
Vol 05 (11) ◽  
pp. 767-781 ◽  
Author(s):  
VLADIMIR I. BREGADZE ◽  
IGOR B. SIVAEV ◽  
DETLEF GABEL ◽  
DIETER WÖHRLE
Keyword(s):  
Neutron Capture ◽  
Tumor Therapy ◽  
The Other ◽  
Medical Applications ◽  
Neutron Capture Therapy ◽  
Current Interest ◽  
Boron Compounds ◽  
Other Hand ◽  
The One ◽  
Derivatives Of

The synthesis of compounds containing polyhedral boron cages and porphyrin or phthalocyanine units connected covalently in one molecule is reviewed. The importance of these compounds arises, on the one hand, from the use of polyhedral boron derivatives in neutron capture therapy for cancer; on the other hand, porphyrins and phthalocyanines are known as photosensitizers in photodynamic tumor therapy. Current interest in the binding of polyhedral boron compounds to porphyrins and phthalocyanines is due to the observation that porphyrins and phthalocyanines show improved uptake and good persistence in tissues. Medical applications of compounds containing polyhedral boron cages and porphyrin or phthalocyanine units in one molecule are briefly discussed.

scholarly journals XIV. On some new derivatives of chloroform

1856 ◽  
Vol 7 ◽  
pp. 135-138 ◽  
Keyword(s):  
Hydrochloric Acid ◽  
Chemical Reactions ◽  
The Other ◽  
The One ◽  
Derivatives Of

According to the results of recent researches in the constitution of salts and the methods thence introduced of explaining chemical reactions, it is equally correct to represent such a reaction as that of hydrochloric acid on hydrate of potash, as consisting in an exchange of hydrogen of the one for potassium of the other, or of chlorine in one for peroxide of hydrogen in the other.

Races of Fusarium oxysporum f. sp. apii in California and their genetic interrelationships

1984 ◽  
Vol 62 (3) ◽  
pp. 546-550 ◽  
Author(s):  
John E. Puhalla
Keyword(s):  
Acid Phosphatase ◽  
Fusarium Oxysporum ◽  
Colony Size ◽  
Laboratory Tests ◽  
The Other ◽  
Vegetative Incompatibility ◽  
Race 1 ◽  
Race 2 ◽  
The One ◽  
Derivatives Of

Other researchers distinguished two races of Fusarium oxysporum f. sp. apii based on virulence tests; race 1 attacked only yellow celery varieties, whereas race 2 attacked both yellow and green types. In the present study, a third race, race 3, was found which attacked only green celery. Three laboratory tests were devised that identified these three races without recourse to virulence tests. The laboratory-based criteria included colony size on a sorbose-containing medium, allozymic differences for the enzyme acid phosphatase, and heterokaryon, or vegetative, incompatibility. These laboratory tests also tentatively defined two additional races, 2E and 3E, and they indicated that some avirulent strains isolated from celery were attenuated variants of all three races. Race 1 was clearly unrelated to race 2, and therefore the one did not arise from the other. However, races 2 and 3 appeared to be closely related. Strains of these two races were genetically very homogeneous and could be clonal derivatives of a single progenitor. Races 1 and 2E, however, each represented a group of genetically diverse strains. So far only races 2 and 3 have been found in California.

scholarly journals Biochemical and Mutational Studies of the Bacillus cereus CECT 5050T Formamidase Support the Existence of a C-E-E-K Tetrad in Several Members of the Nitrilase Superfamily

2011 ◽  
Vol 77 (16) ◽  
pp. 5761-5769 ◽  
Author(s):  
Pablo Soriano-Maldonado ◽  
Ana Isabel Martínez-Gómez ◽  
Montserrat Andújar-Sánchez ◽  
José L. Neira ◽  
Josefa María Clemente-Jiménez ◽  
...  
Keyword(s):  
Helicobacter Pylori ◽  
Sequence Analysis ◽  
Bacillus Cereus ◽  
The Other ◽  
Human Pathogens ◽  
Purification And Characterization ◽  
Content Type ◽  
The One ◽  
Derivatives Of

ABSTRACTFormamidases (EC 3.5.1.49) are poorly characterized proteins. In spite of this scarce knowledge, ammonia has been described as playing a central role in the pathogenesis of human pathogens such asHelicobacter pylori, for which formamidase has been shown to participate in the nitrogen metabolic pathway. Sequence analysis has revealed that at least two different groups of formamidases are classified as EC 3.5.1.49: on the one hand, the derivatives of the FmdA-AmdA superfamily, which are the best studied to date, and on the other hand, the derivatives ofHelicobacter pyloriAmiF. Here we present the cloning, purification, and characterization of a recombinant formamidase fromBacillus cereusCECT 5050T (BceAmiF), the second member of the AmiF subfamily to be characterized, showing new features of the enzyme further supporting its relationship with aliphatic amidases. We also present homology modeling-based mutational studies confirming the importance of the Glu140 and Tyr191 residues in the enzymatic activities of the AmiF family. Moreover, we can conclude that a second glutamate residue is critical in several members of the nitrilase superfamily, meaning that what has consistently been identified as a C-E-K triad is in fact a C-E-E-K tetrad.

scholarly journals Koszul Complexes and Pole Order Filtrations

2014 ◽  
Vol 58 (2) ◽  
pp. 333-354 ◽  
Author(s):  
Alexandru Dimca ◽  
Gabriel Sticlaru
Keyword(s):  
Linear Systems ◽  
Homogeneous Polynomial ◽  
The Other ◽  
Koszul Complex ◽  
Partial Derivatives ◽  
Nodal Surface ◽  
Pole Order ◽  
Open Set ◽  
The One ◽  
Derivatives Of

AbstractWe study the interplay between the cohomology of the Koszul complex of the partial derivatives of a homogeneous polynomial f and the pole order filtration P on the cohomology of the open set U = ℙn \ D, with D the hypersurface defined by f = 0. The relation is expressed by some spectral sequences. These sequences may, on the one hand, in many cases be used to determine the filtration P for curves and surfaces and, on the other hand, to obtain information about the syzygies involving the partial derivatives of the polynomial f. The case of a nodal hypersurface D is treated in terms of the defects of linear systems of hypersurfaces of various degrees passing through the nodes of D. When D is a nodal surface in ℙ3, we show that F2H3(U) ≠ P2H3(U) as soon as the degree of D is at least 4.

scholarly journals Gérard-Sibuya's versus Majima's concept of asymptotic expansion in several variables

2001 ◽  
Vol 71 (1) ◽  
pp. 21-35 ◽  
Author(s):  
J. A. Hernández ◽  
J. Sanz
Keyword(s):  
Asymptotic Expansion ◽  
Holomorphic Function ◽  
The Other ◽  
Several Variables ◽  
Other Hand ◽  
The One ◽  
The Relationship ◽  
Derivatives Of

AbstractWe give an example of a holomorphic function, admitting Gérard-Sibuya asymptotic expansion on a polysector of Cn, and such that none of its derivatives admits such an expansion. This motivates the study of the relationship between the concepts of asymptotic expansion in several variables respectively given by Gérard-Sibuya and Majima. For a function f, Majima's notion is proved to be equivalent, on the one hand, to the existence of Gérard-Sibuya asymptotic expansion for f and its derivatives, and on the other hand, to the boundedness of the derivatives of f on bounded proper subpolysectors of S.

scholarly journals Representations of prostitutes and prostitution as a metaphor in nineteenth-century English newspapers

2017 ◽  
Vol 3 (2) ◽  
pp. 219-240
Author(s):  
Marianna Hintikka ◽  
Minna Nevala
Keyword(s):  
Nineteenth Century ◽  
19Th Century ◽  
Political Institutions ◽  
The Other ◽  
Digital Archive ◽  
British Library ◽  
Link Type ◽  
The Times ◽  
The One ◽  
Cognitive Perspectives

AbstractIn this article, we study the way in which prostitutes, on the one hand, and prostitution, on the other, were evaluated and represented in nineteenth-century English news articles. The main aims of the study are to chart referential terms used of prostitutes as socially marginal agents and objects, as well as to map concepts related to the metaphorical field of prostitution. Our data come from the 19th Century British Library Newspapers Database (British Library newspapers parts 1 and 2: 1800–1900. http://www.gale.com/c/british-library-newspapers-part-i) and The Times Digital Archive (1785–2011. http://www.gale.com/c/the-times-digital-archive), consisting of altogether 300 news articles relating to prostitution. Our results suggest that there is variation between vilification and pity in the language relating to prostitutes in the Victorian press, both from the socio-pragmatic and the cognitive perspectives. While the overall attitudes are mostly negative, there is a tendency to highlight the humanity of the prostitute by referring to her, for example, as a pitiful object of a crime. All the metaphors found in the material also draw from the negativity seen as inherent in prostitution and prostitutes. This is accentuated by the frequent personification of states or political institutions as prostitutes, whose lamentable behaviour or appearance is referred to in the metaphor.

scholarly journals Nominals with Zero Suffixation in Anna Akhmatova’s Early Poems

2020 ◽  
Vol 162 (5) ◽  
pp. 26-32
Author(s):  
T.A. Korneyeva ◽  
Keyword(s):  
Textual Analysis ◽  
Word Formation ◽  
The Other ◽  
Other Hand ◽  
Space Organization ◽  
Poetic Texts ◽  
The One ◽  
Derivatives Of

Zero suffixation in Anna Akhmatova’s poetic texts was studied. The textual analysis of A. Akhmatova’s early poems rich in nominals with various types of zero suffixation was performed. Comparison with her later poems was carried out. On the one hand, this approach shows A. Akhmatova’s desire to overcome the traditions of symbolism and her attempts to develop an original style. On the other hand, nominals with zero suffixation clearly prevailed in A. Akhmatova’s early poems as compared with the later works. Particular attention was paid to the role of nominals with zero suffixation in the poetic space organization of two poetry collections: “Evening” (‘Vecher’) and “Beads” (‘Chetki’). We considered lexical, word-building, syntagmatic, grammatical, stylistic, tropeic, and other features of derivatives of zero suffixes in these poetry collections. It was revealed that nominals with zero suffixation were mainly used as a means of concentration of meanings and embodiment of the special drama of the poet’s lyrical monologue. The results of the research are important for expanding the knowledge on the text-forming function of word formation and, in particular, nominals with zero suffixation.

scholarly journals Sharpening the boundaries between flux landscape and swampland by tadpole charge

2021 ◽  
Vol 2021 (12) ◽  
Author(s):  
Keiya Ishiguro ◽  
Hajime Otsuka
Keyword(s):  
Flux Compactifications ◽  
Scalar Potential ◽  
Low Energy ◽  
The Other ◽  
Effective Theory ◽  
Taylor Model ◽  
De Sitter ◽  
Cancellation Condition ◽  
Vacuum Structure ◽  
De Sitter Vacua

Abstract We investigate the vacuum structure of four-dimensional effective theory arising from Type IIB flux compactifications on a mirror of the rigid Calabi-Yau threefold, corresponding to a T-dual of the DeWolfe-Giryavets-Kachru-Taylor model in Type IIA flux compactifications. By analyzing the vacuum structure of this interesting corner of string landscape, it turns out that there exist perturbatively unstable de Sitter (dS) vacua in addition to supersymmetric and non-supersymmetric anti-de Sitter vacua. On the other hand, the stable dS vacua appearing in the low-energy effective action violate the tadpole cancellation condition, indicating a strong correlation between the existence of dS vacua and the flux-induced D3-brane charge (tadpole charge). We also find analytically that the tadpole charge constrained by the tadpole cancellation condition emerges in the scalar potential in a nontrivial way. Thus, the tadpole charge would restrict the existence of stable dS vacua, and this fact underlies the statement of the dS conjecture. Furthermore, our analytical and numerical results exhibit that distributions of $$ \mathcal{O}(1) $$ O 1 parameters in expressions of several swampland conjectures peak at specific values.

scholarly journals A note on low energy effective theory of chromo-natural inflation in the light of BICEP2 results

2015 ◽  
Vol 30 (11) ◽  
pp. 1550040 ◽  
Author(s):  
Anindita Bhattacharjee ◽  
Atri Deshamukhya ◽  
Sudhakar Panda
Keyword(s):  
Experimental Data ◽  
Recent Result ◽  
Observational Data ◽  
Parameter Space ◽  
Low Energy ◽  
The Other ◽  
Effective Theory ◽  
Inflation Model ◽  
Upper Limit ◽  
Inflationary Models

Recent result of BICEP2, revealing a larger value of tensor to scalar ratio (r), has opened up new investigations of the inflationary models to fit the experimental data. The experiment needs to reconfirm the results, specifically the consistency between Planck and BICEP2. On the other hand, the combined analysis of Planck and BICEP2, including the dust polarization uncertainty, brings down the upper limit on r. In this paper, we re-examine the low energy effective theory of chromo-natural inflation model and its generalization in view of such observational data. We find that the parameter space of the model admits a large value of r as well as other cosmological observables consistent with data.

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