A contribution to the vascular flora of the island of Biševo (central Adriatic, Croatia)

Floristic research on the island of Biševo was carried out during the spring of 2000 and 2001. A total of 32 taxa of vascular plants were recorded for the first time. Among them, 23 taxa are autochthonous and 9 are cultivated or formerly cultivated. The island is new locality for orchids Ophrys tommasinii Vis. and Ophrys x lyrata H. Fleischm. This paper also confirms the existence of the neglected species Reichardia intermedia (Sch.Bip.) Cout. and until now doubtful species Euphorbia terracina L. in the Croatian flora. On the basis of our research and the floristic data published so far, flora of the island of Biševo now consists of 421 plant taxa, which were recorded before the fire that occurred in August of 2003, when 80% of the island was devastated

The flora of the volcanic island of Brusnik (central Dalmatia, Croatia)

Research into the vascular flora of the volcanic island of Brusnik was carried out in the period from 2000 to 2002. A total of 28 higher plant species was found, four of them being noted for the first time. Of the 41 taxa noted by previous authors, 24 were confirmed, but 17 were not. According to analysis of life forms, the most numerous are Therophyta (13 species, 46.4%), followed by Chamaephyta (seven species, 25%), Phanerophyta (four species, 14.3%), Hemicryptophyta (three species, 10.7%) and Geophyta (one species, 3.6%). After analysis of floral elements, autochthonous taxa are grouped into three categories: Mediterranean floral element (18 species, 66.6%), South European floral element (five species, 18.5%) and widespread plants (four species, 14.8%). Especially important plants in the flora of Brusnik are Frankenia pulverulenta L., a very rare species in the Croatian flora and the Illyrian-Adriatic endemic plants Centaurea ragusina L., Limonium vestitum (Salmon) Salmon subsp. brusnicense Trinajsti} and Senecio leucanthemifolius Poir. var. reichenbachii Fiori. The results of our research show that the island of Brusnik belongs, in phytogeographical terms, to the Mediterranean zone proper of the Mediterranean region

Buoyancy Instabilities in a Weakly Collisional Intracluster Medium

The intracluster medium of galaxy clusters is a weakly collisional, high-beta plasma in which the transport of heat and momentum occurs primarily along magnetic-field lines. Anisotropic heat conduction allows convective instabilities to be driven by temperature gradients of either sign, the magnetothermal instability (MTI) in the outskirts of non-isothermal clusters and the heat-flux buoyancy-driven instability (HBI) in their cooling cores. We employ the Athena MHD code to investigate the nonlinear evolution of these instabilities, self-consistently including the effects of anisotropic viscosity (i.e. Braginskii pressure anisotropy), anisotropic conduction, and radiative cooling. We highlight the importance of the microscale instabilities that inevitably accompany and regulate the pressure anisotropies generated by the HBI and MTI. We find that, in all but the innermost regions of cool-core clusters, anisotropic viscosity significantly impairs the ability of the HBI to reorient magnetic-field lines orthogonal to the temperature gradient. Thus, while radio-mode feedback appears necessary in the central few tens of kpc, conduction may be capable of offsetting radiative losses throughout most of a cool core over a significant fraction of the Hubble time. Magnetically-aligned cold filaments are then able to form by local thermal instability. Viscous dissipation during the formation of a cold filament produces accompanying hot filaments, which can be searched for in deep Chandra observations of nearby cool-core clusters. In the case of the MTI, anisotropic viscosity maintains the coherence of magnetic-field lines over larger distances than in the inviscid case, providing a natural lower limit for the scale on which the field can fluctuate freely. In the nonlinear state, the magnetic field exhibits a folded structure in which the field-line curvature and field strength are anti-correlated.Comment: 20 pages, 20 figures, submitted to ApJ; Abstract abridge

The Kinetics of the Formation of Aluminium Hydroxideby Seeding Sodium Aluminate Solutions with Hydrargillite Crystals IV. On the »Contact-intercrystallization«

It is shown that agglomeration of fine particles takes place in this system by the contact of crystallites. This mechanism is very quick and does not involve any measurable separation of a new solid phase from the solution. The name »contact-intercrystallization« is proposed. The most suitable way of evaluating the weight- size-distribution results is discussed. A method for distinguishing between various crystallization- mechanisms is proposed and some suggestions for practical application are given

The Kinetics of the Formation of Aluminium Hydroxideby Seeding Sodium Aluminate Solutions with Hydrargillite Crystals IV. On the »Contact-intercrystallization«

It is shown that agglomeration of fine particles takes place in this system by the contact of crystallites. This mechanism is very quick and does not involve any measurable separation of a new solid phase from the solution. The name »contact-intercrystallization« is proposed. The most suitable way of evaluating the weight- size-distribution results is discussed. A method for distinguishing between various crystallization- mechanisms is proposed and some suggestions for practical application are given

Comment on the Black Hole Recoil Candidate Quasar SDSS J092712.65+294344.0

SDSS J092712.65+294344.0 has been proposed as a candidate for a supermassive black hole (~10^8.8 solar masses) ejected at high speed from the host galactic nucleus by gravitational radiation recoil, or alternatively for a supermassive black hole binary. This is based on a blueshift of 2650 km/s of the broad emission lines ("b-system") relative to the narrow emission lines ("r-system") presumed to reflect the galaxy velocity. New observations with the Hobby-Eberly Telescope (HET) confirm the essential features of the spectrum. We note a third redshift system, characterized by weak, narrow emission lines of [O III] and [O II] at an intermediate velocity 900 km/s redward of the broad line velocity ("i-system"). A composite spectrum of SDSS QSOs similar to J0927 illustrates the feasibility of detecting the calcium K absorption line in spectra of sufficient quality. The i-system may represent the QSO host galaxy or a companion. Photoionization requires the black hole to be ~3 kpc from the r-system emitting gas, implying that we are observing the system only 10^6 yr after the recoil event and contributing to the low probability of observing such a system. The HET observations give an upper limit of 10 km/s per year on the rate of change of the velocity difference between the r- and b-systems, constraining the orbital phase in the binary model. These considerations and the presence of a cluster of galaxies apparently containing J0927 favor the idea that this system represents a superposition of two AGN.Comment: 18 pages, 4 figures, ApJ in press, revised discussion of stellar absorption features and binary black hole mode

Oxalis pes-caprae L. (Oxalidaceae), nova vrsta u hrvatskoj flori

This paper reports the first findings of the species Oxalis pes-caprae L. in Croatia. The species was found in the town of Komiža (the island of Vis) in the spring of 2000 as well as on the island of Biševo in the spring of 2001. In both cases plants were found within ruderal vegetation. The species is extensively naturalized in the Mediterranean region and western Europe, but in Croatian flora it comes as an adventitious species.U radu se iznose podaci o prvim nalazima vrste Oxalis pes-caprae L. u Hrvatskoj. Vrsta je nađena u gradu Komiži na otoku Visu u proljeće 2000. godine, te na otoku Biševu u proljeće 2001. godine. Na oba nalazišta biljke su zabilježene unutar ruderalne vegetacije. U Mediteranu i zapadnoj Europi vrsta je uvelike naturalizirana, dok u flori Hrvatske dolazi kao adventivna vrsta

Nicotiana glauca Graham (Solanaceae), a new invasive plant in Croatia

The South American species Nicotiana glauca Graham (Solanaceae) is invasive in the western Mediterranean and has been found for the first time at four localities in Croatia. The first locality was discovered in 1977 on the island of Lokrum, but has previously been neglected, the second in Komi`a on the island of Vis, the third in the city of Split and the fourth in the city of Dubrovnik. The newly discovered N. glauca is a woody perennial species, while two other Nicotiana species occurring in Croatian, N. tabacum L. and N. rustica L., are annual herbs. An identification key for these three species and their morphological comparison is presented. The further spreading of N. glauca in Croatian littoral can be expected, and should be prevented

Oxalis pes-caprae L. (Oxalidaceae), nova vrsta u hrvatskoj flori

This paper reports the first findings of the species Oxalis pes-caprae L. in Croatia. The species was found in the town of Komiža (the island of Vis) in the spring of 2000 as well as on the island of Biševo in the spring of 2001. In both cases plants were found within ruderal vegetation. The species is extensively naturalized in the Mediterranean region and western Europe, but in Croatian flora it comes as an adventitious species.U radu se iznose podaci o prvim nalazima vrste Oxalis pes-caprae L. u Hrvatskoj. Vrsta je nađena u gradu Komiži na otoku Visu u proljeće 2000. godine, te na otoku Biševu u proljeće 2001. godine. Na oba nalazišta biljke su zabilježene unutar ruderalne vegetacije. U Mediteranu i zapadnoj Europi vrsta je uvelike naturalizirana, dok u flori Hrvatske dolazi kao adventivna vrsta

Trauma i mentalno zdravlje mladih: medijatorska uloga afektivne vezanosti, mentalizacije i disocijacije

The aim of this research was examining the effect of early trauma experiences on the development of maladaptive mental health outcomes, as well as to test the effects of attachment, mentalization and dissociation in this relationship. The sample was was comprised of 121 adolescents from foster care in Republic of Serbia, aged 11 to 18. The respondents filled in a battery of instruments, including Childhood Trauma Questionnaire – CTQ (Bernstain i Fink, 1998), Relationship Questionaire-Clinical version RQ-CV (Holmes & Lyons-Ruth, 2006), The Reflective Functioning Questionnaire, RFQ (Fonagy et al., 2016), Dissociative experience scale for adolescents, A-DES (Armstrong, Putnam, Carlson, Libero & Smith, 1997) and Child behavior checklist-youthself report (Achenbach & Rescorla, 2001). Our findings suggest that dissociation had statistically significant mediating role in the relationship between trauma and internalizing (b=.1.81, SE=.04, p<.001 externalizing (b=2.86, SE=.49, p<.001) and social problems (b=.43, SE=.04, p<.001). Attachment and mentalization can be considered as a moderators of the examined relationships, since results of models testing moderation effects showed that trauma and attachment security (b=-.05, SE=.01, p<.001) and trauma and profound-distrust (b=.99, SE=.01, p<.001) had a significant interaction effect on internalizing symptoms; that trauma and hypomentalization (b=.01, SE=.00,p<.001) had a significant interaction effect on externalizing symptoms; while trauma and hypermetalization had a significant interaction effect on externalizing symptoms (b=-.01, SE=.00, p<.05) and social problems (b=-.005, SE=.001, p<.001). The obtained results were interpreted within the context of contemporary theoretical conceptualizations focusing on resilience (secure attachment style, optimal reflective functioning, hypermentalizing) and vulnerability (profounddistrust, hypomentalizing) factors in response to trauma. Practical implications and limitations of this study were discusse