Rheological properties of concentrated dispersions of muscle Pollack proteins acetylated to different degrees as a function of temperature have been studied. The character of viscosity changes of the partially acetylated isolates is almost identical with that of unacetylated protein. However, the temperatures corresponding to viscosity maxima increase proportionally to the degree of acetylation. A total acetylation of the free lysine ?-amino groups of Pollack protein results in a significant increase in the critical concentration and/or temperature of the sol-gel transition. 相似文献
An experimental investigation of the phase relations in the titanium (Ti)-aluminum (Al)-silicon (Si) system was undertaken
by differential thermal analysis, x-ray diffraction, metallography, and microprobe analysis. The present measurements when
combined with those from an earlier investigation at this laboratory provide data for 56 alloy compositions in the Ti-Al-Si
system. The combined results allowed the construction of a solidus projection, a melting diagram including both solidus and
liquidus, partial isothermal sections at 1270 °C and 1250 °C, three isopleths with a constant percentage of one or another
component, and a reaction scheme. 相似文献
In this paper we propose three variants of a linear feature extraction technique based on Adaboost for two-class classification
problems. Unlike other feature extraction techniques, we do not make any assumptions about the distribution of the data. At
each boosting step we select from a pool of linear projections the one that minimizes the weighted error. We propose three
different variants of the feature extraction algorithm, depending on the way the pool of individual projections is constructed.
Using nine real and two artificial data sets of different original dimensionality and sample size we compare the performance
of the three proposed techniques with three classical techniques for linear feature extraction: Fisher linear discriminant
analysis (FLD), Nonparametric discriminant analysis (NDA) and a recently proposed feature extraction method for heteroscedastic
data based on the Chernoff criterion. Our results show that for data sets of relatively low-original dimensionality FLD appears
to be both the most accurate and the most economical feature extraction method (giving just one-dimension in the case of two
classes). The techniques based on Adaboost fare better than the classical techniques for data sets of large original dimensionality.
It is shown that an algebraic interval solution of interval linear algebraic systems with matrix composed of “reverse” interval elements of the input matrix is a maximum inner estimation for the mited solution set in the sense of inclusion. 相似文献
In this paper, we report methods for correction of selectivity of sorbents based on N-(2-sulfoethyl)chitosan towards platinum(IV) and palladium(II) in HCl solutions. The common method for correction of selectivity of the sorbents is variation of their modification degree with complexing groups. An increase in the degree of sulfoethylation of the chitosan leads to the significant increase in selectivity of sorption of palladium(II) over platinum(IV). Application of the N-(2-sulfoethyl)chitosan with the highest degree of sulfoethylation allows for selective separation palladium(II) from platinum(IV) (рН = 5.0). Palladium is quantitatively desorbed from the surface of the N-(2-sulfoethyl)chitosans by 3.5 mol/dm3 solution of HCl. 相似文献
The article substantiates that the transformation of the world economy associated with Industry 4.0 leads to a significant change in the way resources are used and affects the possibility of implementing the concept of sustainable development. In this regard, a combined analysis of the concept of new industrial development and the concept of sustainable development, as well as an assessment of the current practice of their implementation is required. In this paper, such an analysis was carried out on the example of water resources management. The paper proposes a methodology for assessing the correlation of water management and industrial development levels of regions. This includes the use of both traditional statistical approaches to the analysis of the level of development of economic systems, and elements of data mining. The neural network is constructed in order to estimate the forecasted values of the water intensity of the gross regional product when the indicators of the level of industrial development of the regions change. The results show that the most significant indicators for changing water intensity include advanced production technologies used, the share of value-added to high-tech industries, and innovative activities of organisations.
The scope of work is to study the mutual influence of metal ions during their sorption by sulfoethylated chitosan. The sorption isotherms of metal ions from single- and multi-component solutions are obtained. The sorption capacity of the sorbent towards Ag(I) and Cu(II) is revealed to be 1.63 and 1.41 mmol/g in single-, and 1.40 and 0.85 mmol/g in five-component solution. By comparing the affinity parameter and capacity of sulfoethylated chitosan towards ions in single- and multi-component solutions, it is concluded that Ag(I) and Cu(II) ions suppress the sorption of cobalt(II), nickel(II), zinc(II), cadmium(II), magnesium(II), calcium(II), strontium(II), barium(II), manganese(II) and lead(II). 相似文献