Unconstrained partial-wave amplitudes obtained at discrete energies from fits to complete sets of experimental data may not vary smoothly with energy, and are in principle non-unique. We demonstrate how this behavior can be ascribed to the continuum ambiguity. Starting from the spinless scattering case, we demonstrate how an unknown overall phase depending on energy and angle mixes the structures seen in the associated partial-wave amplitudes making the partial wave decomposition non-unique, and illustrate it on a simple toy model. We then apply these principles to pseudo-scalar meson photoproduction and show that the non-uniqueness effect can be removed through a phase rotation, allowing a consistent comparison with model amplitudes. The effect of this phase ambiguity is also considered for Legendre expansions of experimental observables. 5 pages,

The assessment of quality of old apple varieties was made in order to preserve and use these germplasm in the area of Bosnia and Herzegovina. The characterization was done for ten old varieties of apples selected on the basis of good characteristics of sensory analysis. The following parameters were considered: fruit weight, fruit length and width, stalk length and width, fruit flesh firmness; soluble solids content and total dry matter content of the fruit juice; pH, titratable acidity (TA), vitamin C, total phenolics, total flavonoids and antioxidant potential evaluated by DPPH radical scavenging assay. Statistical analysis was performed separately for sensory, pomological and biochemical characterization (in two consecutive years) by analysis of variance. Only traits such as weight, width and height of the fruit were the biggest in ‘Vinjugara’ which had a low content of titratable acidity whereby it could be singled out as an acceptable variety for consumers. ‘Đedovaca’ had the highest content of phenols (1711.8 mg GAE/100 g of fruit weight), which is in complete relationship with good free radical scavenging activity (11.1 mg of fresh fruit/ml). ‘Kolacara’ and ‘Gospoinjaca’ were distinguished as particularly interesting for good nutritional characteristics, primarily the content of phenols, flavonoids and free radical scavenging ability, but also for suitable storage characteristics, °Brix content and firmness. Due to favourable pomological and biochemical characteristics these varieties were recommended to be included in the breeding program that will result in the enrichment of germplasm of the apples from these areas.

OBJECTIVE The aim was to determine the prevalence of marijuana smoking among school-aged adolescents in the Brčko District of Bosnia and Herzegovina, with particular regard to their gender, age and residence, and the frequency of marijuana smoking in the past thirty days in relation to their peers in the rest of Bosnia and Herzegovina, the Republic of Croatia and the Republic of Serbia. SUBJECTS AND METHODS This research, designed as a cross-sectional study and based on the ESPAD (European School Survey Project on Alcohol and Other Drugs) questionnaire, adjusted to this research, encompassed 4,188 adolescents from elementary and secondary schools. The data were collected by means of questionnaires tailored to each respondent. RESULTS A significantly lower number of adolescents smoke marijuana in comparison to those who do not smoke, but male adolescents smoke more often than female adolescents (p<0.001), as well as urban youth in comparison to rural youth (p=0.04). Every fourth adolescent, regardless of gender, who smoked marijuana, used it before the age of thirteen (p<0.001), male adolescents more often than females (p=0.002). In the previous thirty days a higher percentage of all the respondents from the Brčko District had smoked marijuana than those from the Republika Srpska and the RS (p<0.001), and there is no difference between them and their peers from the Federation of Bosnia and Herzegovina and the RC (p=0.382 and p=0.608). CONCLUSION Smoking marijuana in the Brčko District is a major public health problem. Male adolescents smoke marijuana more often than female adolescents, and urban youth more in comparison to rural youth. In the previous thirty days adolescents from the Brčko District smoked more often than their peers from the Republic of Serbia and the Republika Srpska, and with the same intensity but less frequently compared to adolescents from the Republic of Croatia and the Federation of Bosnia and Herzegovina.

OBJECTIVE The aim of the study was to evaluate the incidence, mortality, risk factors, aetiology and the susceptibility to antibiotics of the bacteria responsible for sepsis. MATERIAL AND METHODS A single centre, prospective, observational study, involving 200 neonates admitted over 12 months to the NICU of the University Children's Hospital, Tuzla, Bosnia and Herzegovina. RESULTS The crude incidence of all neonatal sepsis was 68.0% (136/200) and that of late-onset sepsis (LOS) was 48.5% (97/200), yelding an incidence density of LOS of 41.6/1000 patient days. LOS represented the most frequent infection and was significantly more frequent than early-onset sepsis (EOS) (71.3% versus 28.7% p<0.001). The overall mortality was 14.0%, and 18.4% among infected neonates. Risk factors associated with LOS were: mechanical ventilation, intravascular catheter, surgical procedures, birth weight ≤1500 g, gestational age ≤ 28 weeks and Apgar score ≤ 3 at 5 minutes. Culture proven sepsis developed in 43.4% of neonates. Klebsiella pneumoniae and Enterococcus faecalis were the predominant bacteria. Gram-negative bacteria were susceptible to amikacin, imipenem and meropenem; gram-positive bacteria to vancomycin and amikacin. CONCLUSION Neonatal sepsis in our NICU showed a high incidence rate, and gram-negative bacteria were predominant. Low gestational age, mechanical ventilation and an intra-vascular catheter were significantly associated with sepsis. It is necessary to develop a multidisciplinary approach for routine surveillance of nosocomial infections, to improve the asepsis of therapeutic procedures, and to implement the more appropriate use of antibiotics.