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.

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.

Isotopic Abundances Measurements a Key to Understanding the Oklo Phenomenon

1980 ◽  
Vol 35 (2) ◽  
pp. 171-179 ◽  
Author(s):  
J. C. Ruffenach ◽  
R. Hagemann ◽  
E. Roth
Keyword(s):  
Nuclear Reactions ◽  
Nuclear Reactors ◽  
Fission Products ◽  
Chemical Analyses ◽  
Pressurized Water ◽  
Long Term Storage ◽  
Isotopic Abundances ◽  
Water Reactors ◽  
Term Storage

AbstractThe Oklo natural nuclear reactors have been studied mainly by isotopic and chemical analyses of uranium and fission products. Interpretation of these analyses allows parameters which characterize these reactions (flux, fluence,...), and also the age and duration of the nuclear reactions to be evaluated. The mechanisms and extent of fission-product migration can also be discussed. The behaviour of various elements formed in the Oklo uraninite and in oxyde fuels of pressurized water reactors is compared and found to be similar. Therefore, experience gained from the study of the Oklo phenomenon can provide valuable information on the long-term storage of radioactive wastes in geological media.

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.

Application of Synchrotron X-Ray Fluorescence Microscopy to the Study of Multi-Metal Oxide Ceramics

1998 ◽  
Vol 524 ◽  
Author(s):  
Dale L. Perry ◽  
Scott McHugo ◽  
Albert C. Thompson ◽  
Joseph C. Farmer ◽  
Bart B. Ebbinghaus ◽  
...  
Keyword(s):  
Fluorescence Microscopy ◽  
Metal Oxide ◽  
Oxide Ceramics ◽  
Chemical Analyses ◽  
Elemental Mapping ◽  
X Ray ◽  
Long Term Storage ◽  
Term Storage ◽  
Actinide Elements

ABSTRACTSynchrotron x-ray fluorescence microscopy has been used to study multi-metal oxide ceramics that have been designed to sequester radioactive actinide elements for long-term storage and disposal. X-ray fluorescent lines for the various elements have been used for lateral elemental mapping of the materials, and the heterogeneity of the samples is discussed with respect to the elements in the crystallographic phases that have previously been documented by other means of structural and chemical analyses.

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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