[en] In 1980s, Arak has obtained powerful inequalities for the concentration functions of sums of independent random variables. Using these results, he has solved an old problem stated by Kolmogorov. In this paper, one of Arak’s results is modified to include generalized arithmetic progressions in the statement.

[en] A non-aqueous titration method has been used for quantifying the suppressor concentration in the MCU solvent hold tank (SHT) monthly samples since the Next Generation Solvent (NGS) was implemented in 2013. The titration method measures the concentration of the NGS suppressor (TiDG) as well as the residual tri-n-octylamine (TOA) that is a carryover from the previous solvent. As the TOA concentration has decreased over time, it has become difficult to resolve the TiDG equivalence point as the TOA equivalence point has moved closer. In recent samples, the TiDG equivalence point could not be resolved, and therefore, the TiDG concentration was determined by subtracting the TOA concentration as measured by semi-volatile organic analysis (SVOA) from the total base concentration as measured by titration. In order to improve the titration method so that the TiDG concentration can be measured directly, without the need for the SVOA data, a new method has been developed that involves spiking of the sample with additional TOA to further separate the two equivalence points in the titration. This method has been demonstrated on four recent SHT samples and comparison to results obtained using the SVOA TOA subtraction method shows good agreement. Therefore, it is recommended that the titration procedure be revised to include the TOA spike addition, and this to become the primary method for quantifying the TiDG.

[en] The groundwater facet of the revised CA is responsible for generating predicted contaminant concentration values over the entire analysis spatial and temporal domain. These estimates will be used as part of the groundwater pathway dose calculation facet to estimate dose for exposure scenarios. Based on the analysis of existing models and available information, the P2R Model was selected as the numerical simulator to provide these estimates over the 10,000-year temporal domain of the CA. The P2R Model will use inputs from initial plume distributions, updated for a start date of 1/1/2017, and inputs from the vadose zone facet, created by a tool under development as part of the ICF, to produce estimates of hydraulic head, transmissivity, and contaminant concentration over time. A recommendation of acquiring 12 computer processors and 2 TB of hard drive space is made to ensure that the work can be completed within the anticipated schedule of the revised CA.

[en] Highlights: • Accurate calculation of deviation from Beer's law is based on convergence criteria. • The higher the extinction, the smaller the area of obedience to Beer's law. • The accuracy of calculating the molar attenuation is set manually. • Systematic errors of spectroscopic measurements now can be excluded. In this paper, we propose new approach to accurate calculation of the molar attenuation coefficient ε and the threshold concentration $C_{\mathrm{\nabla }}$, exceeding of which it results in a deviation from Beer's law. The method is based on the asymptotic approximation of the equality of integrals associated with the true values of $C_{\mathrm{\nabla }}$ and $\epsilon$ as well as their approximate values $C_i$ and ${\epsilon }_i$ within max. rapprochement:$\mathrm{\Delta }C=\min \left\{C_i-C_{\mathrm{\nabla }}\right\}$ and $\mathrm{\Delta }\epsilon =\min \left\{\epsilon -{\epsilon }_i\right\}$ when $C_i\to C_{\mathrm{\nabla }}$ and ${\epsilon }_i\to \epsilon$. After reaching the acceptable accuracy, the infinite iterative cycle is interrupted that allows to significantly saving the computing resources.

No abstract available

[en] A test strip has been developed for the rapid detection of the illegal additive ethyl anthranilate (EA) in wine. The detection scheme is based on a combination of photonic crystal based detection and molecular imprinting based recognition. The resulting molecularly imprinted photonic crystal (MIPC) undergoes a gradual color change from green to yellow to red upon binding of EA. A semi-quantitative colorimetric card can be used to estimate the content of EA, either visually or by making use of an optical fiber spectrometer. A linear relationship was found between the Bragg diffraction peak shift and the concentration of EA in the range from 0.1 mM to 10 mM. The detection limit is 10 μM. The test has been successfully used to screening for the presence of EA in grape wine. The test strip is selective, and can be re-used after re-activation.

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[en] The study was conducted to evaluate the molluscicidal activity of E. rheedii methanol bark extract against P. canaliculata and to screen for phytochemical compounds of E. rheedii bark extracts. The golden apple snails with size range of 20 - 40 mm were treated with four different concentrations of E. rheedii (1000, 5000, 10000 and 20000 ppm) and paddy-field water mix with 50 % methanol serving as the control treatment. The molluscicidal effects of the extract were evaluated after 24, 48 and 72 hours. The results of the study showed that high treatment concentrations (10000 and 20000 ppm) recorded the highest mortality rate (100 %) while low concentrations (1000 ppm) showed the lowest mortality rate (27 %). However, no mortality was recorded in the control treatment. The molluscicides activity with LC₅₀ is 1,611 ppm and LC₉₀ is 4,266 ppm and could be attributed to the presence of saponin in the bark extracts. E. rheedii bark extract provides a great potential for developing green pesticides to control P. canaliculata. Nevertheless, further research is needed to determine its biochemical mechanism. (author)

[en] Carrot (Daucus carota L) is vegetable that contain body essetial vitamins, especially β-carotene. In this research, the essense of fresh carrots are taken and processed to carrot powder using foam mat drying method. This research aims to study the effect of temperature and concentration of foaming agent to the β-carotene content in product derived from carrots. The temperature variation that used in this research are 40°C, 50°C, 60°C and 70°C, while he variation of foaming agent (tween 80) are 0,01% (v/v); 0,1%(v/v); 0,2%(v/v) and 0,3%(v/v). The results shows that the maximum drying temperature is 50°C with β-carotene content 10.55 mg/kg and the maximum concentration of foaming agent (tween 80) is 0.2% (v/v) with β-carotene content 10.36 mg/kg. (paper)

[en] The concentration and cloaking phenomena of physical fields in Metamaterials has captured the attention of the researchers due to their simplified approaches. However most of the work conducted is focussed on controlling single physical field. Transformation optics has paved the way for developing intelligent bifunctional devices. Bifunctional devices are such controlled devices which execute two different physical functions simultaneously and independently. In this work we have applied the transformation optics theory to design a multilayered two dimensional spherical bifunctional device which behaves like an electric concentrator and thermal invisibility cloak simultaneously. Moreover, we have also observed the normalized behavior of the proposed device. The simulation performance confirms the feasibility of our suggested model. (paper)

[en] An easy, specified, accurate, precise and reproducible quantitative analyses for determination of celiprolol hydrochloride drug by used used zero, first, second and third order derivative and peak area spectrophotometry method. The suggest methods determined the drug in the concentration range (0.5-30) μg.mL⁻¹, at 286.6 nm for 0^th order, at 306.6 and 272.2 nm for 1^st order, at 319.2, 289.8 and 250.2 nm for 2^nd order and at 325.6, 304.8, 242.2 and 219.6 nm for 3^rd order derivative spectrophotometry, respectively. The peak area spectrophotometry method also used in the same range for determining celiprolol hydrochloride, at (284.4-379.2) and (248.6-284.4) nm for 1^st order, at (306.4-372.2), (271.2-306.4) and (239.4-271.2) nm for 2^nd order, and at (318.6-363.8), (290.4-318.6), (233.2-250.4) and (210.8-233.2) nm for 3^rd order, respectively. The accuracy and precision of the methods used was calculated and the results were highly satisfactory. The limit of detection (LOD) and limit of quantification (LOQ) was calculated for the suggested methods, Where (LOD) was within range (0.0124-0.0632) μg.mL⁻¹, and (LOQ) within range (0.0415-0.1632) μg.mL⁻¹. The methods were successful in application when estimating celiprolol hydrochloride drug on some pharmaceutical tablets available in the local markets. (paper)