Photodissociation of the {HeH+^+} molecular ion

The photodissociation cross section of the molecular ion HeH$^+$ was calculated within the Born-Oppenheimer approximation for a parallel, a perpendicular, and an isotropic orientation of the molecular axis with respect to the field, considering also different initial vibrational and rotational states. The results were compared to recent data from a free-electron laser experiment performed at the FLASH facility [H.B. Pedersen {\it et al.}, Phys. Rev. Lett. 98, 223202, (2007)]. Within the experimental uncertainties theoretical and experimental results are compatible with each other.Comment: 16 pages, 8 figure

Analytical Methods Helping the Archaeologists: Archaeometry

Very important objects of cultural heritage are material objects and objects of art produced by all communities. The physical and mechanical properties of material culture are always of prime concern to archaeometry and science-based archaeology. The preservation of material culture for future generations with the best possible fidelity requires in-depth knowledge, to aid the most suitable restoration, conservation, storage, and eventual museum display. A wise utilization of modern methods of chemical analysis is a significant element of research studies into such objects providing information on the most suitable methods of their restoration and conservation. There is wide enthusiasm among conservators and curators for the application of analytical tools to enhance the management of collections. Modern chemical analysis offers numerous methods and measuring techniques which can be employed for archaeometric purposes. This paper is a short overlook to the analytical methods currently applied in archaeometry, as well as our own group experience concerning this subject

A new approach to balance dental fear and anxiety by using BachTM Flower Therapy

Treatments in dentistry currently consist of an interdisciplinary approach, including (but not necessarily limited to) the holistic perspective. The different fields of allopathic and complementary medicine are used together to ensure not only a high-quality restorative treatment, but also to provide patients with psychological and emotional support. This perspective also applies to dental anxiety, which consists of complex (emotional, vegetative and psychomotor) manifestations. One of the most well-known complementary therapies for reducing dental fear and anxiety is BachTM Flower Therapy. Even if the mechanism of action of this therapy is not yet scientifically documented, notable results have been and continue to be reported in the literature in several clinical studies on patients with dental diseases. It is indicated for both adults and children, in the latter when they go through major biological changes, such as primary and permanent dentition. As a conclusion, BachTM flower therapy is effective and complementary to dental treatments applied to patients, by reducing stress, anxiety, as well as creating a climate of peace, trust and confidence, both for the patient and the doctor. In addition, it is a relatively accessible and cheap form of care, with no significant adverse effects noted so far

Search for dark matter produced in association with bottom or top quarks in √s = 13 TeV pp collisions with the ATLAS detector

A search for weakly interacting massive particle dark matter produced in association with bottom or top quarks is presented. Final states containing third-generation quarks and miss- ing transverse momentum are considered. The analysis uses 36.1 fb−1 of proton–proton collision data recorded by the ATLAS experiment at √s = 13 TeV in 2015 and 2016. No significant excess of events above the estimated backgrounds is observed. The results are in- terpreted in the framework of simplified models of spin-0 dark-matter mediators. For colour- neutral spin-0 mediators produced in association with top quarks and decaying into a pair of dark-matter particles, mediator masses below 50 GeV are excluded assuming a dark-matter candidate mass of 1 GeV and unitary couplings. For scalar and pseudoscalar mediators produced in association with bottom quarks, the search sets limits on the production cross- section of 300 times the predicted rate for mediators with masses between 10 and 50 GeV and assuming a dark-matter mass of 1 GeV and unitary coupling. Constraints on colour- charged scalar simplified models are also presented. Assuming a dark-matter particle mass of 35 GeV, mediator particles with mass below 1.1 TeV are excluded for couplings yielding a dark-matter relic density consistent with measurements

Interactions between angiotensin II and agmatine in experimental inflammation

Agmatine (decarboxylated arginine) significantly reduced the experimentally carageenan inflammatory process enhanced by Ang II in rats. Noteworthy was the strong action of agmatine, very close to that of spermine, although surpassed by that of indomethacin. In contrast, some other polyamines (spermidine, cadaverine and putrescine) had no significant reducing effects. Inhibition of polyamines synthesis by DL--Difluoromethylornithine (DFMO) has further significantly enhanced the pro-inflammatory effects of Ang II at 6 hours. The above findings might demonstrate the involvement of agmatine synthesis (beyond other polyamines) as a reactive response to pro-inflammatory action of angiotensins

FULERENIC MATERIALS WITH BIOMEDICAL APPLICATIONS

Soluble fullerenic derivates are essential for numerous biomedical techniques that exploit the unique structural chemical and physical properties of carbon nanospheres. Their toxicity, demonstrated in vitro and in vivo is important for the characterization and limitation of those applications. The phototoxicity of some fullerene molecules was identified as a future therapeutical instrument. Other studies focused on the decrease of the phototoxicity of hydrosoluble fullerenes follow the use of those compounds as drug delivery systems or their use in environment protection. Starting from the characteristics of those compounds, which can be by themeselves cytotoxic, or could become during irradiation (photosensitizers) we have tried to obtain new materials based on fullerenes and diads/triads fullerene/porphyrines or fullerenes/calixarenes.The obtained complexes were characterized by UV Vis and IR spectroscopy

Contractile effects of angiotensins are independent of receptors internalization in rat aorta

-Arrestins-mediated signaling downstream of seven transmembrane receptors is a relatively new paradigm for signaling by these receptors. The inhibitors of AT1 receptor internalization we tested, that means nigericin, concanavalin A and monensin, did not significantly alter the contractions induced by Ang II in the rat aortic smooth muscle preparations. The same effects we obtained also when we used as agonists Ang I, Ang III and Ang IV. Thus, the contractile effects induced by angiotensin peptides administered in the rat aortic smooth muscle preparations are independent of their receptors internalization. Since -arrestins are mediating G-protein independent signaling via AT1 receptors their involvement in the contractile effects of angiotensin peptides must be further explored