Выбор условий получения электролитических порошков цинка для металлнаполненных композиций

The paper presents a method of obtaining high-dispersed zinc powders by electrolysis and comparison of the properties of zinc-rich compositions prepared using as a pigment zinc powders obtained by different methods. Measurements have shown that the electrical conductivity of zinc-rich coatings containing electrolytic zinc powder, not inferior to the conductivity of the film with powder PZHD-0 obtained by the method of evaporation-condensation, despite the significant difference in the amount of zinc pigment. On the basis of the received data we can conclude that the use of electrolytic zinc powder as a pigment will significantly save zinc.В работе представлен способ получения высокодисперсных порошков цинка электролизом и сравнение свойств цинкнаполненных композиций, приготовленных с применением в качестве пигмента цинковых порошков, полученных разными методами. Проведенные измерения показали, что удельная электропроводность цинкнаполненных покрытий, содержащих электролитический порошок цинка, не уступает по проводимости пленкам с порошком ПЦВД-0, полученного методом испарения-конденсации, несмотря на существенное различие в количестве цинкового пигмента. На основании полученных данных можно сделать вывод, что использование электролитического порошка цинка в качестве пигмента позволит значительно экономить цинк.This work was supported by RFBR, project number 11-03-00226.Работа выполнена при поддержке РФФИ, проект № 11-03-00226

Influence of the Tread Material on the Efficiency of Protection of Steel Structures of the Water Treatment Tract of CHP

В работе выполнена оценка влияния различных материалов на эффективность протекторной защиты баков-нейтрализаторов, изготовленных из Ст. 3, в средах водоподготовительного тракта ТЭЦ. Определен состав продуктов коррозии, измерены значения рН и электропроводности среды в процессе коррозии стали в водах бака-нейтрализатора. Показано, что наибольшую защиту по отношению к стали в водах переменного состава обеспечивают цинковые протекторы.The paper assesses the effect of various materials on the effectiveness of the sacrificial protection of neutralizing tanks made of St. 3 in the environments of the water treatment path of the CHPP. The composition of corrosion products was determined, the pH values and electrical conductivity of the medium were measured in the process of steel corrosion in the waters of the neutralizing tank. It is shown that zinc protectors provide the greatest protection against steel in waters of variable composition

Disinfection of Surfaces Contaminated with SARS-CoV-2 Coronavirus by UV Radiation of Low-Pressure Mercury-Vapour Lamp

The aim of the work was to determine the effective ultraviolet (UV) doses required for the disinfection of surfaces contaminated with the SARS-CoV-2 coronavirus using a low-pressure mercury lamp. Materials and methods. To carry out prompt disinfection of surfaces, a specially designed source of UV radiation with a power of 7.5 W at a wavelength of 254 nm in the form of a portable flashlight was employed, which has a high efficiency of UV radiation output and the possibility of long-term autonomous operation from a compact battery. In the studies, a suspension culture of the SARS-CoV-2 coronavirus with biological activity of 5.3∙106 PFU/ml was used. The objects of testing were plastic Petri dishes (disposable) and office paper (grade C, density 80 g/m2 ). Results and discussion. Doses of UV radiation that provide disinfection of surfaces contaminated with the COVID-19 pathogen with an efficiency of 99.0 % (paper) to 99.95 % (plastic) have been determined. The results obtained make it possible to recommend a portable UV irradiator for use in the practice of preventive measures to combat the spread of the disease caused by the SARS-CoV-2 coronavirus

Does Sleep Improve Your Grammar? : Preferential Consolidation of Arbitrary Components of New Linguistic Knowledge

We examined the role of sleep-related memory consolidation processes in learning new form-meaning mappings. Specifically, we examined a Complementary Learning Systems account, which implies that sleep-related consolidation should be more beneficial for new hippocampally dependent arbitrary mappings (e.g. new vocabulary items) relative to new systematic mappings (e.g. grammatical regularities), which can be better encoded neocortically. The hypothesis was tested using a novel language with an artificial grammatical gender system. Stem-referent mappings implemented arbitrary aspects of the new language, and determiner/suffix+natural gender mappings implemented systematic aspects (e.g. tib scoiffesh + ballerina, tib mofeem + bride; ked jorool + cowboy, ked heefaff + priest). Importantly, the determiner-gender and the suffix-gender mappings varied in complexity and salience, thus providing a range of opportunities to detect beneficial effects of sleep for this type of mapping. Participants were trained on the new language using a word-picture matching task, and were tested after a 2-hour delay which included sleep or wakefulness. Participants in the sleep group outperformed participants in the wake group on tests assessing memory for the arbitrary aspects of the new mappings (individual vocabulary items), whereas we saw no evidence of a sleep benefit in any of the tests assessing memory for the systematic aspects of the new mappings: Participants in both groups extracted the salient determiner-natural gender mapping, but not the more complex suffix-natural gender mapping. The data support the predictions of the complementary systems account and highlight the importance of the arbitrariness/systematicity dimension in the consolidation process for declarative memories

Выбор условий получения электролитических порошков цинка для металлнаполненных композиций

In the work a method of obtaining highly dispersed zinc powders by electrolysis and comparison of the properties of zinc-rich compositions prepared using as a pigment zinc powders obtained by different methods is provided. Conducted measurements have shown that the electrical conductivity of zinc-rich coatings comprising electrolytic zinc powder does not inferior to the conductivity of the film with PZHD-0 powder obtained by the  evaporation-condensation method, despite the significant difference in the amount of zinc pigment. On the basis of the received data one can conclude that the use of electrolytic zinc powder as a pigment will significantly save zinc.В работе представлен способ получения высокодисперсных порошков цинка электролизом и сравнение свойств цинкнаполненных композиций, приготовленных с применением в качестве пигмента цинковых порошков, полученных разными методами. Проведенные измерения показали, что удельная электропроводность цинкнаполненных покрытий, содержащих электролитический порошок цинка, не уступает по проводимости пленкам с порошком ПЦВД-0, полученного методом испарения-конденсации, несмотря на существенное различие в количестве цинкового пигмента. На основании полученных данных можно сделать вывод, что использование электролитического порошка цинка в качестве пигмента позволит значительно экономить цинк