95 research outputs found
EXPERIMENTAL-ANALYSIS OF THE PROPERTIES OF THE 5-PION EFFECT OBSERVED IN PBARP INTERACTIONS NEAR 1950 MEV-C2
No full textPresent status on the 's-meson' region
No full textThe author discusses the probable existence of several 'objects' in the S region. Convergent indications have been presented about 1970 Me V/c/sup 2/. Missing mass studies and elastic scattering both give structures at about 1925-1930 and 1945-1955 MeV/c/sup 2/. The possibility of a double structure is also discussed. (14 refs)
EXPERIMENTAL-ANALYSIS OF PBARP INTERACTIONS BETWEEN 0 AND 1.2 GEV-C - EVIDENCE FOR A PBARP-]5-PI EFFECT NEAR 1950 MEV-C2
No full textProbe of quantum mechanics through cross section
No full textWe mean to emphasize a conceptual ambiguity which lies upon
the academic definition of any cross section, in particle physics and
quantum mechanics, and which, strictly speaking, might lead to noticeable
discrepancies between experimental determinations at highest energies
(according to specifications of beams and targets).
Efficient tests of quantum mechanics are thus made obvious
An Arabidopsis SR protein relieving ABA inhibition of seedling establishment represses ABA-responsive alternative splicing
No full textLaloum T, Martín G, Lewinski M, et al. An Arabidopsis SR protein relieving ABA inhibition of seedling establishment represses ABA-responsive alternative splicing. bioRxiv. 2023.**Abstract**
The phytohormone abscisic acid (ABA) inhibits postgerminative growth under unfavorable conditions to delay the transition to the autotrophic stage and promote plant survival. While stress-induced ABA accumulation is well established to trigger extensive transcriptional changes, it is becoming clear that it also relies on alternative splicing to enhance stress tolerance. However, the upstream components modulating posttranscriptional regulation of the ABA response remain largely unknown. Here, we show that loss of function of theArabidopsisSR34a protein enhances sensitivity to ABA during seedling establishment. Individual-nucleotide crosslinking and immunoprecipitation (iCLIP) combined with RNA-sequencing revealed that SR34a is an alternative splicing regulator that binds predominantly GCU-rich exonic sequences near splice sites. We find that SR34a targets all alternative splicing event types, including in RNAs encoding known determinants of ABA sensitivity, to prevent ABA-responsive splicing in germinated seeds. Our study sheds mechanistic light on how plant SR proteins regulate alternative splicing and counteract ABA inhibition of early plant growth
Oscillations of neutrinos and quantum mechanics : evidence for dark matter
No full textWe argue that the present classical formalism of neutrino oscillations is just simply approximate (cf. PDG 2006), and should thus still require various second-order corrections : internal kinematic dispersion from internal mass dispersion; apparent violation of Lorentz invariance though transitions of the kind m1=m2, yielding energy shifts (m2^2-m1^2)/(2E) between different mass eigenstates, and made salient in phase factors; and so, necessary transfers of quadri-impulsion with any medium, even vacuum; existence of ether "dark matter", weakly interacting, thus implied in vacuum oscillations; actual violation of some deeply rooted principles of "quantum mechanics" (:corpuscular elementarity, orthogonality of eigenstates amplitudes, Wigner's rules of super-selection, Heisenberg's relations of uncertainty); non-hermiticity of the Hamiltonian operator, involving finite proper lifetimes in rest frames; neutrino mass matrices duly of the "CKM" type, as for quarks; "ubiquity" concept and existence of "probability waves", instead of matter waves, giving serious credibility to the paradoxical lemma of intense radiation from the vicinity of the so-called "black holes" and "pulsars" (thus faking genuine "white wells"). Spontaneous pair creation of zero-mass neutrinos, with finite opposite momenta, may explain the paradoxical excess of "dark energy" over "dark matter", overwhelming at cosmological scales
Paradoxes in the Galaxy balance, and origin of the cosmic rays
No full textVarious outstanding paradoxes in the mechanical balance of the Galaxy are highlighted. There outmost relevance must needs find a coherent and likely explanation. We propose a unique and synthetic interpretation, including a cosmological theory of the origin of the observed cosmic rays, especially at the highest energies known. It involves matter-antimatter annihilation in the median plane of the Milky Way. Accordingly, we discuss the structure and equilibrium of the Galaxy, seen as made of two parallel disks of matter versus antimatter dominance, opposed through the repulsion of an annihilation gas, settled in the equator disk. The admitted suppression of antimatter in the Universe, after the "big-bang", is questioned. Various tests performed, indeed, tend to confirm our theory; in particular, the now classical power-law energy behaviour of the incident flux of energetic cosmic rays is easily derived, quite with expected exponents of -2.5 and -3 (main dependence, including the first knee). Ultra-high energies, further, are easily attainable, with no necessary restriction of the "GZK" kind, for instance. Beyond 10^20 eV, rather, a new break is still made possible
- …
