Authors:D. Hadanich, J. Perédi, M. Juhász-Román, and B. Nagy
In the microflora of sunflower seeds stored in domestic stores the,
species dominate, while those of
Penicillium, Trichoderma, Stemphylium
spp. are present in lower numbers. During model tests (cca 20% seed moisture content, 25 °C, 4 weeks storage) the
species were almost completely eliminated and on the seeds mainly
species, characteristic of stores, propagated. The moulds significantly deteriorated the quality of the seed and that of the produced oil and meal (reproductive ability, germinating power, oil content, lipoxygenase enzyme activity, acid value, peroxide value, fatty acid composition, UV absorbance, colour, sensorial properties, as well as the protein content, amino acid composition, colour and the smell of the meal), but no aflatoxin production occurred. The findings offer a comprehensive picture on the multiple destructive effects of incorrect storage.
Contamination and adsorption of trace elements during storage of natural water samples in polyethylene containers have been studied. Variations of concentrations of 29 elements in pH=1.5 natural water samples stored in polyethylene bottles for 15 and 30 days respectively were determined by the method of freeze-drying preconcentration and NAA. The percentage adsorption loss of radioactive indicators60Co,124Sb,65Zn,75Se,134Cs and46Sc in the pH=1.5–8.0 reservoir water, tap water and distilled water stored for 1–2 months were also determined. The optimized storage condition for natural water is obtained.
Authors:Yasuo Yoshihashi, Etsuo Yonemochi, Youri Maeda, and Katsuhide Terada
The induction period of crystallization of amorphous naproxen in solid dispersion was measured by DSC. Hydroxypropylmethylcellulose
acetate succinate LG (HPMCAS-LG) was selected as a polymer of solid dispersion, because of the excellent inhibitory effect
of crystallization. Naproxen was chosen as a model drug having poor water solubility and poor physical stability of glassy
state. The prediction of crystallization of amorphous naproxen in solid dispersion at the desired storage temperature or the
desired polymer content was carried out. If the storage condition satisfied the requirement that was either more than 90%
of HPMCAS-LG content at 333 K or below storage temperature of 301 K for 50% HPMCAS-LG content, the induction period of crystallization
of naproxen in solid dispersion would be more than 1 year. The storage period of amorphous drug in solid dispersion of desired
storage temperature and desired drug content might be predictable from measurement data of induction period of crystallization.
A fast (14-MeV) neutron activation analysis procedure was employed to directly measure mass fractions of oxygen in coal samples. The procedure demonstrated sufficient precision and accuracy to determine a relative change of about 5% or more, in the oxygen mass fraction of about 12%. The procedure was applied to test samples of the newly developed SRM 1632c Trace Elements in Coal (Bituminous). The samples had been stored at three conditions: in liquid nitrogen vapor and at room temperature in the original containers packaged under argon, and for accelerated aging at 50 °C open to air. Following six months storage increments, duplicate samples of each of twelve bottles of the SRM were measured for each storage condition. In addition each sample was processed through ten separate analytical runs yielding a total of some 720 measurements per storage duration. Oxygen was determined by comparison to a primary standard potassium dichromate and the accuracy of the method was assessed through the analysis of replicate samples of three reference materials that are certified for oxygen content. The initial 6-months test period indicated uptake of oxygen in the open-air storage.
Authors:R. A. Candeia, F. S. M. Sinfrônio, T. C. Bicudo, N. Queiroz, A. K. D. Barros Filho, L. E. B. Soledade, I. M. G. Santos, A. L. Souza, and A. G. Souza
( a ) and FAEE ( b )
Storagecondition of the seeds, extraction procedure and treatment of the extracted oils can also affect the stability of the biofuel and consequently its quality. The oxidative stabilities of
Authors:Emma Chiavaro, Lorenzo Cerretani, Maria Paciulli, and Stefano Vecchio
slight differences can be found among values derived by different Evoos at the same cooling rate and storagecondition.
The analysis of results derived by the Avrami approach and its Jeziorny modification [ 16 ] must be completed by combining
Authors:Mohammad Al Bratty, Neelaveni Thangavel, Ramalingam Peraman, Vinod Kumar, Padmanabha Reddy, Krishna Veni Nagappan, and Hassan Al Hazmi
and approval process [ 2 ]. It provides evidence regarding the impact of various environmental factors on the quality of drug substances or drug products in real-time and is the scientific basis to recommend the storagecondition and package technology