Optically active diamide as a model for studying interactions between mineral salts and nylon type polyamides in methanol solutions

Analysis methods developed specifically to determine the presence of ink and other optically active components in paper machine white waters or other process effluents are not available. It is generally more interest¬ing to quantify the effect of circulation water contaminants on end products. This study compares optical techniques to quantify the dirt in process water by two methods for test media preparation and measurement: direct process water filtration on a membrane foil and low-grammage sheet formation. The results show that ink content values obtained from various analyses cannot be directly compared because of fundamental issues involving test media preparation and the varied methodologies used to formulate the results, which may be based on different sets of assumptions. The use of brightness, luminosity, and reflectance and the role of scattering measurements as a part of ink content analysis are discussed, along with fine materials retention and measurement media selection. The study concludes with practical tips for case-dependent measurement methodology selection.

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Microscopic Structure of Er-Related Optically Active Centers in Si

MRS Proceedings ◽

10.1557/proc-770-i7.1 ◽

2003 ◽

Vol 770 ◽

Author(s):

H. Przybylinska ◽

N. Q. Vinh ◽

B.A. Andreev ◽

Z. F. Krasil'nik ◽

T. Gregorkiewicz

Keyword(s):

Ground State ◽

Photoluminescence Spectrum ◽

Zeeman Effect ◽

Optically Active ◽

Single Type ◽

Active Centers ◽

Mbe Growth ◽

Spectral Components ◽

Er Doped ◽

Successful Observation

AbstractA successful observation and analysis of the Zeeman effect on the near 1.54 μm photoluminescence spectrum in Er-doped crystalline MBE-grown silicon are reported. A clearly resolved splitting of 5 major spectral components was observed in magnetic fields up to 5.5 T. Based on the analysis of the data the symmetry of the dominant optically active center was conclusively established as orthorhombic I (C2v), with g‼≈18.4 and g⊥≈0 in the ground state. The fact that g⊥≈0 explains why EPR detection of Er-related optically active centers in silicon may be difficult. Preferential generation of a single type of an optically active Er-related center in MBE growth confirmed in this study is essential for photonic applications of Si:Er.

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Optically Active Gold-Based Composite Particles For Sensing And Catalytic Applications

10.30707/etd2020.lartey.j ◽

2020 ◽

Author(s):

Jemima Asi Lartey

Keyword(s):

Optically Active ◽

Composite Particles ◽

Catalytic Applications

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Local mineral feed additives in the rations of steers of Hereford breed

Kormlenie sel'skohozjajstvennyh zhivotnyh i kormoproizvodstvo (Feeding of agricultural animals and feed production) ◽

10.33920/sel-05-2002-03 ◽

2020 ◽

pp. 28-39

Author(s):

M. Grigoryev ◽

N. Chernogradskaya

Keyword(s):

Economic Effect ◽

Live Weight ◽

Negative Influence ◽

Feed Additives ◽

The Body ◽

Control Group ◽

Mineral Salts ◽

Meat Productivity ◽

Experimental Group ◽

Mineral Feed Additives

Animals imported to Yakutia from other regions fall into feeding and housing conditions that differ from their usual agro-climatic conditions, which causes the problem of their adaptation. Yakutia is one of the areas where the feed of its own production has a lack of basic minerals, which affects the health and productivity of animals, which has an additional negative influence on the adaptation process of imported cattle. In order to replenish macro- and microelements in the body, it is necessary to introduce various local mineral feed additives, premixes, and use mineral salts into the ration. Under the conditions of Central Yakutia the influence of local mineral feed additives (zeolite of the Khonguruu Deposit in the Suntar district and sapropels of local lakes) containing macro- and microelements that increase the meat productivity of steers has been studied. As a result of the research the influence of local mineral feed additives on meat productivity and physiological condition of Hereford steers has been established. Influence of zeolite and sapropel in a complex with mineral salts on digestibility of nutrients of the ration and use of nitrogen, calcium and phosphorus by experimental animals has been defined. The influence of feed additives on the quality of meat products has been studied. The results have shown that the use of local mineral feed additives in the composition of ration of steers during the fattening period at a dose of 0,7 g zeolite per 1 kg of live weight of the animal and 200 g of sapropel in combination with 10 g of mineral salts contributed to the gain in live weight, carcass weight, carcass yield, yield of edible parts, and economic efficiency of fattening. For the entire period of the experiment the gain in live weight in groups was: in control group 2222,9 kg, in the 1st experimental group 2396,2 kg, in the 2nd experimental group 2471,1 kg. The total economic effect for the 1st experimental group for the period of experiment amounted to 44,3 thousand Rubles, for the 2nd experimental group 78,0 thousand Rubles or per 1 head/day 14,06 and 24,76 Rubles, respectively.

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