PHYSICO-CHEMICAL PARAMETERS OF LONG-TERM STORAGE OF BEE`S HONEY

2020 ◽  
Vol 1 (5) ◽  
pp. 32-36
Author(s):  
L. N. Lazareva ◽  
◽  
L. I. Shtangret ◽  
J. V. Shapoval ◽  
O. S. Koval ◽  
...  
Keyword(s):  
Chemical Parameters ◽  
Long Term Storage ◽  
Physico Chemical ◽  
Term Storage

Проаналізовано 30 зразків меду бджолиного довготривалого зберігання (з 2009 по 2018 р.). Установлено, що діастазна активність меду падає. Так у 6 зразках меду діастазне число нижче ніж 10 од. Готе, ці зразки не відповідають вимогам державних стандартів. Виявлено, що при аналізі зразків меду бджолиного з 2009 по 2015 р. вміст гідроксиметилфурфуролу (ГМФ) був понад 25 мг/кг, що не відповідає вимогам ДСТУ. Зразки терміном зберігання з 2016 по 2018 р. відповідають за показниками якості меду першого ґатунку. Показано, що найбільше значення вмісту проліну відмічається у меді зразка № 11 2015 року – 773,0 мг/кг, а найнижчий показник вмісту проліну був у зразку № 25 2013 р. Електропровідність зразків меду тривалого зберігання становила від 0,128 до 0,524 мС/см, що відповідає вимогам щодо якості меду. Ключові слова: мед бджолиний, діастаза, ГМФ (гідроксиметилфурфурол), пролін, електропровідність.

scholarly journals The influence of non-normative fuel on its operational properties

2019 ◽  
Vol 178 (3) ◽  
pp. 67-70
Author(s):  
Anna MATUSZEWSKA ◽  
Marlena OWCZUK
Keyword(s):  
Quality Standards ◽  
Chemical Analyses ◽  
Oxidation Processes ◽  
Long Term Storage ◽  
Physico Chemical ◽  
Resistance To Oxidation ◽  
Normative Requirements ◽  
Term Storage

Fuels that do not meet the requirements of quality standards cannot be used to power vehicle engines. The work involved physico-chemical analyses of non-normative fuel and its effect on the operational properties of the powered vehicle. The research fuels were two gasolines, characterized by a reduced resistance to oxidation processes due to their long-term storage. The results were compared to the properties of conventional fuels that met all normative requirements. The studies have shown that the fuel slightly deviating from the standard parameters does not noticeably affect the useful properties of the vehicle.

scholarly journals Probing Phonons in Plutonium

2003 ◽  
Vol 802 ◽  
Author(s):  
Joe Wong ◽  
Michael Krisch ◽  
Daniel L. Farber ◽  
Florent Occelli ◽  
Adam J. Schwartz ◽  
...  
Keyword(s):  
Solid State ◽  
Chemical Properties ◽  
Pure Metal ◽  
Detailed Understanding ◽  
Safety Issues ◽  
Long Term Storage ◽  
Toxic Materials ◽  
Physico Chemical ◽  
Term Storage

Plutonium (Pu) is well known to have complex and unique physico-chemical properties [1]. Notably, the pure metal exhibits six solid-state phase transformations with large volume expansions and contractions along the way to the liquid state: α → β → γ → δ → δ' → ε→ liquid. Unalloyed Pu melts at a relatively low temperature ∼640 °C to yield a higher density liquid than that of the solid from which it melts, (Figure 1). Detailed understanding of the properties of plutonium and plutonium-based alloys is critical for the safe handling, utilization, and long-term storage of these important, but highly toxic materials. However, both technical and and safety issues have made experimental observations extremely difficult.

scholarly journals Improvement of storage resistance of sausage products to micellar mushrooms by synthetic protective shrinks

2020 ◽  
Vol 10 (4) ◽  
pp. 242-249
Author(s):  
K.O. Rodionova ◽  
A.P. Palii ◽  
A.P. Paliy
Keyword(s):  
Protective Coating ◽  
Protective Coatings ◽  
Retail Trade ◽  
Chemical Parameters ◽  
Long Term Storage ◽  
Physical And Chemical Parameters ◽  
Physical And Chemical ◽  
Intensive Development ◽  
Term Storage

The aim of the work was to establish the frequency of detection of mold of raw smoked sausages and to evaluate the use of synthetic protective shrinks, which provide long-term storage of sausages. Nine batches (310 samples) of raw smoked sausages were examined, 487 crops were made on special media, 154 samples of sausages were examined according to physical and chemical parameters. We determined that an intensive contamination of their surface with micellar fungi during the sale of raw smoked sausages in retail trade is taking place: Penicillium (62.9%), Aspergillus (18.2%), Mucor (10.7%), Cladosprium (4.5%). We found that on the 5th day of their sale 4.57±1.64% of experimental sausage bulks are contaminated with micellar fungi but more massive and intensive development of micromycelia was found on the 20th day of sale (29.32±8.16% of cases). We proved that the use of protective coating/srink “Optiglianets” (Lofink Group, Ukraine), “CoatStar 110” (OJSC “Upakprint”, Russia), “Polisved1” (OJSC “Omega”, Russia), “Antibak Tauchmassa” (Company “Swed Holding”, Russia) and “Tauchmasse KP-15”, Italy), delayed up to 20 days the development of micellar fungi on the surface of prototypes of smoked sausages. We applied them in a thin layer (0.06-0.10 mm depending on the applied means) on the surface of sausage bulks and dried in drying chambers at temperature of 15.0±2.0 °C and 45 minutes exposure at a relative humidity of 70%. The weight loss of raw smoked sausages was the lowest with the use of protective coating “Optiglyanets” (Lofink Group, Ukraine) and “Polisved-1” (OJSC “Omega”, Russia). It was 14.5±0.8% and equal to 60% reduction compared to other protective coatings/shrinks implementation.

Modelling of Moisture Movement in Wood during Outdoor Storage

2001 ◽  
Vol 6 (2) ◽  
pp. 3-14 ◽  
Author(s):  
R. Baronas ◽  
F. Ivanauskas ◽  
I. Juodeikienė ◽  
A. Kajalavičius
Keyword(s):  
Experimental Data ◽  
Finite Difference ◽  
Climatic Conditions ◽  
Two Dimensional ◽  
Moisture Movement ◽  
Finite Difference Technique ◽  
Long Term Storage ◽  
Space Formulation ◽  
Term Storage

A model of moisture movement in wood is presented in this paper in a two-dimensional-in-space formulation. The finite-difference technique has been used in order to obtain the solution of the problem. The model was applied to predict the moisture content in sawn boards from pine during long term storage under outdoor climatic conditions. The satisfactory agreement between the numerical solution and experimental data was obtained.

Trehalose: a cryoprotectant that enhances recovery and preserves function of human pancreatic islets after long-term storage

Diabetes ◽  
1997 ◽  
Vol 46 (3) ◽  
pp. 519-523 ◽  
Author(s):  
G. M. Beattie ◽  
J. H. Crowe ◽  
A. D. Lopez ◽  
V. Cirulli ◽  
C. Ricordi ◽  
...  
Keyword(s):  
Pancreatic Islets ◽  
Human Pancreatic Islets ◽  
Long Term Storage ◽  
Term Storage
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