326 research outputs found
Influence of nutrition on productivity and chemical composition of khorasan wheat-triticum turgidum l. Ssp. turanicum jakubz
Khorasan wheat (Triticum turgidum L. ssp. turanicum Jakubz.) the white awn population is the optional type of a high-energy grain. This study aimed to examine the influence of plantsā mineral nutrition on the chemical composition of Khorasan grain. The mineral diet used in the supplementary plant nutrition affected the total amount of dry matter and the chemical composition of wheat grains, increasing its nutritional value. At the time of harvest, Khorasan wheat grains contained 89.74% of dry matter, i.e. 10.26% of water, while in the variants with additional nutrition had less dry matter 86.90% and more water, 13.10%, which indicates an extension of the vegetation period of plants in conditions of enhanced mineral nutrition. Mineral nutrition, which primarily increased the amount of nitrogen, statistically significantly affected protein synthesis in plants. Khorasan wheat grains had 14.94% of total proteins in the control and 15.2% in variants with NPP nutrition. Plant nutrition did not have a greater impact on the synthesis of oils in the grains, starch, NFE, and mineral salts content. The supplementary nutrition affected the total amount of dry matter and chemical composition of wheat grain increasing its nutritional value
CMB anisotropies seen by an off-center observer in a spherically symmetric inhomogeneous universe
The current authors have previously shown that inhomogeneous, but spherically
symmetric universe models containing only matter can yield a very good fit to
the SNIa data and the position of the first CMB peak. In this work we examine
how far away from the center of inhomogeneity the observer can be located in
these models and still fit the data well. Furthermore, we investigate whether
such an off-center location can explain the observed alignment of the lowest
multipoles of the CMB map. We find that the observer has to be located within a
radius of 15 Mpc from the center for the induced dipole to be less than that
observed by the COBE satellite. But for such small displacements from the
center, the induced quadru- and octopoles turn out to be insufficiently large
to explain the alignment.Comment: 8 pages (REVTeX4), 7 figures; v2: minor changes, matches published
versio
Frequency combs and optical feedback in Quantum Cascade Lasers: a unifying theoretical framework
We propose a unified theoretical framework for the frequency comb formation
and optical feedback effects in semiconductor lasers. We use the quantum
cascade laser as a suitable device to develop the framework unifying these two
research areas, so far treated distinctly. We generate a novel feedback regime
diagram and we provide a proof of principle that feedback can be used to induce
and manipulate frequency combs, selecting their harmonic order. These results
open a pathway towards new methodologies for hyperspectral imaging, multimode
coherent sensing, and multi-channel communication
Optimization of Collateral Value Distribution
Loan Loss Provisioning (LLP) is an amount of reserve that banks "put aside" to cover loss in case that loan goes in default, meaning that clients do not repay it. It is a safety buffer for preserving banks liquidity and capital adequacy. On the other hand, the Loan Loss Provisioning is a cost. In the Profit and Lost statement of banks, LLP decreases profit. It is a good tool/mechanism for risk management, but also expensive one, and that is why it is important for banks to optimize it in every possible way.
The aim of optimization is to distribute collateral value to the connected loans, in a way to minimize amount of LLP. It can be done easily on a one loan level, but creating a universal algorithm that is applicable to all loans and all collaterals on the Bank portfolio level, is the goal to be achieved
Effect of temperature on the physical changes and drying kinetics in plum (Prunus domestica L.) PožegaÄa variety
In this study, drying kinetics of autochthonous variety PožegaÄa plum was examined in a laboratory dryer at three temperatures. The whole plum fruits, together with the kernels were subjected to the drying process. The effect of drying has been examined at temperatures of 55, 60 and 75 Ā°C, with a constant air velocity of 1.1 m s-1. The corresponding experimental results were tested using six nonlinear regression models. Coefficient of determination (R2), standard regression error (SSE), model correlation coeficient (Vy), as well as the maximum absolute error (ĪY) showed that the logaritmic model was in good agreement with the experimental data obtained. During drying of plums, the effective diffusivity was found to be between 5.6Ć10-9 for 55 Ā°C and 8.9Ć10-9 m2 s-1 at 75 Ā°C, respectively. The physical characteristics of fresh (length 39.64 mm and width 29.15 mm) and dried (length 37.52 mm and width 22.85 mm) plum fruit were determined. Finally, by chemical analysis, the contents of micro- and macro-elements (Fe, Mn, Cu, B and N, F, K, Ca, Mg and S) in the skin and flesh of the dried product, prunes, has been established
Missing Power vs low-l Alignments in the Cosmic Microwave Background: No Correlation in the Standard Cosmological Model
On large angular scales (greater than about 60 degrees), the two-point
angular correlation function of the temperature of the cosmic microwave
background (CMB), as measured (outside of the plane of the Galaxy) by the
Wilkinson Microwave Anisotropy Probe, shows significantly lower large-angle
correlations than expected from the standard inflationary cosmological model.
Furthermore, when derived from the full CMB sky, the two lowest cosmologically
interesting multipoles, the quadrupole (l=2) and the octopole (l=3), are
unexpectedly aligned with each other. Using randomly generated full-sky and
cut-sky maps, we investigate whether these anomalies are correlated at a
statistically significant level. We conclusively demonstrate that, assuming
Gaussian random and statistically isotropic CMB anisotropies, there is no
statistically significant correlation between the missing power on large
angular scales in the CMB and the alignment of the l=2 and l=3 multipoles. The
chance to measure the sky with both such a lack of large-angle correlation and
such an alignment of the low multipoles is thus quantified to be below 10^{-6}.Comment: 4 Pages, 1 Figur
Comparative analysis of expression of angiogenic factors and CD44 gene in human glioma and neuroblastoma cell lines in vitro
Angiogenesis is essential for tumor growth and relies on the production of angiogenic factors. By comparative analysis using RT-PCR method of angiogenic growth factors: VEGF, bFGF, PDGF-A, angiogenin- 1 and IL-8 we established the level of expression of these genes necessary for angiogenesis in glioma and neuroblastoma cell lines. Our analyses were also extended to CD44 gene, which plays an important role in cascade of metastasis and progression of brain tumors. Significant differences in the level of gene expression of angiogenic factors and CD44 gene between the two cell lines observed throughout this study can be used as a prognostic marker for predicting clinical outcome in human brain tumors at the time of the initial staging.Angiogeneza je neophodna za rast tumora i zahteva proizvodnju angiogenih trofiÄkih faktora koji uÄestvuju u tumorogenezi. Uporednom analizom angiogenih trofiÄkih faktora: VEGF, bFGF, PDGF-A, angiogenina-1 i IL-8 pomoÄu metode RT-PCR utvrdili smo nivo ekspresije ovih gena ukljuÄenih u proces angiogeneze u Äelijskim linijama glioma i neuroblastoma. TakoÄe smo proÅ”irili analize i na CD44 gen koji igra važnu ulogu u kaskadi nastanka i progresiji metastaza tumora mozga. Dobijeni rezultati ukazuju na znaÄajnu razliku u nivou genske ekspresije angiogenih faktora i CD44 gena u ove dve Äelijske linije Äije se poreklo razlikuje ne samo po nastanku veÄ i po mestu rasejavnja metastaza. Rezultati bi mogli da posluže kao prognostiÄki faktor u prekliniÄkim i kliniÄkim istraživanjima tumora mozga od inicijalnih do terminalnih stupnjeva nastanka i terapije
6-hydroxydopamine lesions of the striatum lead to the alterations of dopamine receptor mrna in parkinsonian rats
The effects of four-site intrastriatal 6-hydroxydopamine (6-OHDA) lesions were examined in adult male rats. Five days after the lesions the animals were checked for specific rotational behavior induced by middle dose of amphetamine and the results confirmed the effectiveness of the lesions. The RNAs from the striatum were isolated at different time points after the lesion, and the RT-PCR analyse were performed for the D1 and D2 receptor mRNA. The results show a decline in the D2 receptor mRNA level (40%) at 6 h and 24 h points while this change was not observed seven days after the lesion. In contrast, no statistically significant changes in the level of the D1 receptor mRNA after the lesion at any time point were found.Ispitivani su efekti Äetiri ubodne 6-hidroksidopaminske (6-OHDA) lezije striatuma kod odraslih mužjaka pacova. Pet dana nakon lezije, životinje su testirane na specifiÄno rotaciono ponaÅ” anje pod uticajem srednje doze amfetamina i rezultati su potvrdili efikasnost lezije. RNK iz striatuma su izolovane u razliÄitim vremenskim taÄkama nakon lezije i uraÄena je RT-PCR analiza iRNK za D1 i D2 dopaminske receptore. Rezultati pokazuju smanjivanje nivoa iRNK za D2 receptor (40%) 6 h i 24 h nakon lezije, dok sedam dana nakon lezije nema promena. Za razliku od ovih rezultata, u nivou iRNK za D1 receptor ne postoje statistiÄki znaÄajne razlike u bilo kojoj vremenskoj taÄki
Powder Diffraction Data and Mesomorphic Properties for 4-Butyloxyphenyl 4'-Decyloxybenzoate
Unit cell parameters obtained from X-ray powder diffraction data are
presented for the crystalline phase of a liquid crystal 4-butyloxyphenyl
4'-decyloxybenzoate: a = 23.098 (4) {\AA}, b = 5.974 (6) {\AA}, c = 12.357 (10)
{\AA}, \b{eta} = 121.53 (8){\deg}, unit-cell volume V = 1453.56 {\AA}3.
Temperature dependent X-ray diffraction data confirmed the existence of smectic
A and smectic C mesophases and a more ordered, tilted crystalline smectic
phase. Possibility of existence of previously reported smectic B phase as well
as another crystalline phase was refuted
Antifungalna aktivnost ekstrakata makrogljiva na fitopatogene sojeve gljiva rodova Fusarium sp. i Alternaria sp.
During the last decades, intensive application of synthetic fungicides in the agricultural crop protection practice caused growing concern for the existence of toxic chemical residues in food as well as in the whole environment. Instead of using synthetic fungicides, it is suggested that crop protection be carried out by using preparations based on compounds of natural origin (secondary metabolites of plants or microorganisms, including macrofungi from Basidiomycota) as biological control agents. The potential of macrofungal species as biocontrol agents was analyzed in this investigation of eight autochthonous species from different locations in Serbia. Both the terricolous species: Coprinus comatus, Coprinellus truncorum, Amanita strobiliformis, Hydnum repandum and the lignicolous species: Flammulina velutipes, Stereum subtomentosum, Trametes versicolor and Bjerkandera adusta were examined, with an aim to detect some novel sources of antifungal agents. This study surveyed antifungal activity of selected macrofungal extracts (MeOH, EtOH and CHCl3) against phytopathogenic Fusarium and Alternaria strains isolated from garlic, soybean and rice: F. proliferatum, F. verticillioides, F. proliferatum, F. graminearum and A. padwickii. Microdilution method in 96 well micro-plates was applied for the estimation of antifungal effects of macrofungi extracts in the range from 24.75 to 198.00 mg/ml and determination of minimal inhibitory (MIC) and minimal fungicidal concentration (MFC). EtOH extract of mychorhizal species H. repandum showed antifungal activity against all analyzed phytopathogenic strains, with the strongest effect on Fusarium strains (MIC 24.75 mg/ml; MFC 24.75 mg/ml). Among others, MeOH extracts of S. subtomentosum and C. micaceus showed similar effects while only B. adusta showed slight effect on Fusarium strains (MIC 24.75-99.00 mg/ml; MFC 24.75-99.00 mg/ml) and none effect on A. padwickii. The obtained results indicate the possibility of using examined extracts as efficient antifungal agents and provide the basis for the new formulations of biocontrol agents against phytopathogenic fungi in the future.Tokom poslednjih decenija intezivna primena sintetiÄkih fungicida u zaÅ”titi poljoprivrednih useva izaziva sve veÄu zabrinutost ljudi zbog prisustva toksiÄnih hemijskih ostataka u prehrambenim proizvodima kao i celoj okolini. Umesto koriÅ”Äenja sintetiÄkih fungicida, preporuÄuje se da se zaÅ”tita useva vrÅ”i koriÅ”Äenjem preparata na bazi jedinjenja prirodnog porekla (sekundarni metaboliti biljaka ili mikroorganizama ukljuÄujuÄi i makrogljive iz razdela Basidiomycota) kao agense bioloÅ”ke kontrole. U ovom radu istraživan je potencijal agenasa bioloÅ”ke kontrole za osam autohtonih vrsta makrogljiva s razliÄitih lokaliteta u Srbiji. Obe, terikolne vrste: Coprinus comatus, Coprinellus truncorum, Amanita strobiliformis, Hydnum repandum i lignikolne vrste: Flammulina velutipes, Stereum subtomentosum, Trametes versicolor i Bjerkandera adusta su istražene s ciljem da se otkriju neki novi izvori antifungalnih agenasa. U okviru ovog rada istražena je antifungalna aktivnost odabranih ekstrakata makrogljiva (metanolni, etanolni i hloroformski) protiv fitopatogenih sojeva Fusarium i Alternaria izolovanih s belog luka, soje i pirinÄa: F. proliferatum, F. verticillioides, F. proliferatum, F. graminearum i A. padwickii. Za procenu antifungalnog efekta ekstrakata makrogljiva upotrebljena je mikrodiluciona metoda mikrotitar ploÄama s 96 velova u opsegu koncentracija od 24,75 do 198,00 mg/ml i determinaciju minimalne inhibitorne (MIC) i minimalne fungicidne koncentracije (MFC). Etanolni ekstrakt mikorizne vrste H. repandum pokazao je atifungalnu aktivnost prema svim analiziranim fitopatogenim sojevima, sa najjaÄim efektom prema sojevima Fusarium (MIC 24,75 mg/ml; MFC 24,75 mg/ml). IzmeÄu ostalog, sliÄan efekat pokazali su i metanolni ekstrakti S. subtomentosum i C. micaceus, dok je samo B. adusta imala blagi efekat na sojeve Fusarium (MIC 24,75-99,00 mg/ml; MFC 24,75-99,00 mg/ml), ali ne i na A. padwickii. Dobijeni rezultati ukazuju na moguÄnost koriÅ”Äenja ispitanih ekstrakata kao veoma efikasnih antifungalnih agenasa i samim tim oni predstavljaju osnovu za nove formulacije biokontrolnih agenasa protiv fitopatogenih gljiva u buduÄnosti
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