40 research outputs found
Low-calorie marmalades
The number of people suffering from insulin-dependent (Diabetes Melitus type I) and insulin-independent (Diabetes Melitus type II) is huge, and the number of potential diseased is in permanent rise. For that reason products with reduced amount of sugar have become very popular. Factory "Srbijanka" Valjevo manufactures reduced–sugar marmalades from apricot peach, strawberry, apple and orange. Low–metoxyl pectins and high-grade locust bean gum were used as gelation agents. Sensory evaluation and energy value of these marmalades were determined and all samples were highly graded. All marmalades belonged to the group of low-calorie (dietetic) products
Sombor cheese
Somborski sir kao originalni jugoslavenski sir bio je do sada predmet raznih ispitivanja. Ta ispitivanja odnosila su se uglavnom na izučavanja rasprostranjenosti, uvjeta i načina izrade, mogućnosti unapređenja njegove tehnologije ili na izučavanje kemijskih i mikrobioloških osobina sira koji je dobiven takvom proizvodnjom.Sombor cheese is an original yugoslav cheese. It used be manufactured from ewe\u27s milk. Considerable quantities of the cheese is still manufactured from ewe\u27s or mixed ewe\u27s and cow\u27s milk by farmers. The traditional manufacturing procedure has been adapted for making the cheese from cow\u27s milk by modern process in industry at large scale. In the paper it is described cheesmaking applied in industry by indicating technological parameters in a great detail and also given chemical properties of the cheese obtained from cow\u27s milk, tab. 1, 2, 3, 4 and 5. The cheese is made from pasteurized cow\u27s milk containing 4.1 % fat by adding 30 % water, yoghourt starter and CaCl2 before setting at 30-32 °C for 50 min. The curd formed (fig. 3 and 4) by pressing after removal of whey is sliced and dipped into water at 26-28 °C for about 75 min. Finally, the curd slices are placed into wooden containers (small tub) where-in the cheese is formed and the ripening takes place, fig. 5, 6 and 7. The cheese obtained contains in average 56.l % moisture, 23.4 % fat and 53.3 % fat in cheese solids
Measurement of Cosmic Radiation Exposure of Aircraft Crew At Commercial Aviation Altitudes
The measurement results of ambient dose equivalent rate in an aircraft, performed by a standard portable dosimeter, at a non-commercial flight Belgrade - Podgorica at altitudes up to 9000 meters, are shown. By numerical interpolation of the measurement results, a functional dependency of the ambient dose equivalent rate on the altitude of the airplane flight is determined, obtaining a good agreement with the reference values. For commercial airlines in the Balkan region, total ambient dose equivalent, regarding the aircraft crew occupationally exposed to radiation in the course of a flight, was calculated and the maximum permitted number of flight hours per year, was estimated
Concentration Dependence of Superconductivity and Order-Disorder Transition in the Hexagonal Rubidium Tungsten Bronze RbxWO3. Interfacial and bulk properties
We revisited the problem of the stability of the superconducting state in
RbxWO3 and identified the main causes of the contradictory data previously
published. We have shown that the ordering of the Rb vacancies in the
nonstoichiometric compounds have a major detrimental effect on the
superconducting temperature Tc.The order-disorder transition is first order
only near x = 0.25, where it cannot be quenched effectively and Tc is reduced
below 1K. We found that the high Tc's which were sometimes deduced from
resistivity measurements, and attributed to compounds with .25 < x < .30, are
to be ascribed to interfacial superconductivity which generates spectacular
non-linear effects. We also clarified the effect of acid etching and set more
precisely the low-rubidium-content boundary of the hexagonal phase.This work
makes clear that Tc would increase continuously (from 2 K to 5.5 K) as we
approach this boundary (x = 0.20), if no ordering would take place - as its is
approximately the case in CsxWO3. This behaviour is reminiscent of the
tetragonal tungsten bronze NaxWO3 and asks the same question : what mechanism
is responsible for this large increase of Tc despite the considerable
associated reduction of the electron density of state ? By reviewing the other
available data on these bronzes we conclude that the theoretical models which
are able to answer this question are probably those where the instability of
the lattice plays a major role and, particularly, the model which call upon
local structural excitations (LSE), associated with the missing alkali atoms.Comment: To be published in Physical Review
Prospects for precision measurements of atomic helium using direct frequency comb spectroscopy
We analyze several possibilities for precisely measuring electronic
transitions in atomic helium by the direct use of phase-stabilized femtosecond
frequency combs. Because the comb is self-calibrating and can be shifted into
the ultraviolet spectral region via harmonic generation, it offers the prospect
of greatly improved accuracy for UV and far-UV transitions. To take advantage
of this accuracy an ultracold helium sample is needed. For measurements of the
triplet spectrum a magneto-optical trap (MOT) can be used to cool and trap
metastable 2^3S state atoms. We analyze schemes for measuring the two-photon
interval, and for resonant two-photon excitation to high
Rydberg states, . We also analyze experiments on the
singlet-state spectrum. To accomplish this we propose schemes for producing and
trapping ultracold helium in the 1^1S or 2^1S state via intercombination
transitions. A particularly intriguing scenario is the possibility of measuring
the transition with extremely high accuracy by use of
two-photon excitation in a magic wavelength trap that operates identically for
both states. We predict a ``triple magic wavelength'' at 412 nm that could
facilitate numerous experiments on trapped helium atoms, because here the
polarizabilities of the 1^1S, 2^1S and 2^3S states are all similar, small, and
positive.Comment: Shortened slightly and reformatted for Eur. Phys. J.
The view from above: the relevance of shared aerial drone videos for destination marketing
The use of drones to produce videos has generated a large amount of visually appealing footage of various destinations. They attract much attention, but there are issues that affect their production, and their relevance to destination marketing. This research examines YouTube meta-data and spatial overlay analysis of shared aerial drone videos from the United Kingdom (UK). The results suggest that shared aerial drone videos have some unique user-generated content (UGC) characteristics and their spatial distribution tend to favor more populated areas. Theoretical and practical implications for destination marketing are further discussed