1,496 research outputs found
INFORMATION TECHNOLOGIES IN FORMATION OF SETTING OF A HEALTHY STUDENT'S LIFESTYLE
This article considered the instruments of influence on young people through various information technologies, and selected the best resource, with an impact on boys and girls aged 16 to 34. In addition there were an-alyzed a comprehensive approach to young people from the Federal Agency for Youth AffairsВ данной статье были рассмотрены инструменты воздействия на молодёжь с помощью различных информационных технологий, а также выбран наилучший ресурс, оказывающий воздействие на молодёжь. Кроме того, был проанализирован комплексный подход к молодым людям со стороны Федерального агентства по делам молодеж
Polarization bremsstrahlung by fast charge on atomic bound electrons—Analog of nuclear M¨ossbauer’s effect
Features of polarization bremsstrahlung radiation (PB) by a relativistic charge on medium electrons bound in atoms are discussed. PB is considered as a dispersion of virtual photons of an electromagnetic field of a fast charge on
atomic bound electrons. In this case atomic electron can get dispersed at a recoil energy in only certain portions, as in the nuclear M¨ossbauer process. Because of this a spectrum of dispersed photons is degenerated in a series of narrow peaks
CREST - a large and diverse superfamily of putative transmembrane hydrolases
<p>Abstract</p> <p>Background</p> <p>A number of membrane-spanning proteins possess enzymatic activity and catalyze important reactions involving proteins, lipids or other substrates located within or near lipid bilayers. Alkaline ceramidases are seven-transmembrane proteins that hydrolyze the amide bond in ceramide to form sphingosine. Recently, a group of putative transmembrane receptors called progestin and adipoQ receptors (PAQRs) were found to be distantly related to alkaline ceramidases, raising the possibility that they may also function as membrane enzymes.</p> <p>Results</p> <p>Using sensitive similarity search methods, we identified statistically significant sequence similarities among several transmembrane protein families including alkaline ceramidases and PAQRs. They were unified into a large and diverse superfamily of putative membrane-bound hydrolases called CREST (alkaline ceramidase, PAQR receptor, Per1, SID-1 and TMEM8). The CREST superfamily embraces a plethora of cellular functions and biochemical activities, including putative lipid-modifying enzymes such as ceramidases and the Per1 family of putative phospholipases involved in lipid remodeling of GPI-anchored proteins, putative hormone receptors, bacterial hemolysins, the TMEM8 family of putative tumor suppressors, and the SID-1 family of putative double-stranded RNA transporters involved in RNA interference. Extensive similarity searches and clustering analysis also revealed several groups of proteins with unknown function in the CREST superfamily. Members of the CREST superfamily share seven predicted core transmembrane segments with several conserved sequence motifs.</p> <p>Conclusions</p> <p>Universal conservation of a set of histidine and aspartate residues across all groups in the CREST superfamily, coupled with independent discoveries of hydrolase activities in alkaline ceramidases and the Per1 family as well as results from previous mutational studies of Per1, suggests that the majority of CREST members are metal-dependent hydrolases.</p> <p>Reviewers</p> <p>This article was reviewed by Kira S. Markarova, Igor B. Zhulin and Rob Knight.</p
Результаты исследований влияния биоэнергетических факторов на повышение урожайности в растениеводстве
The results of a fundamental research is presented confirming two hypotheses concerning the process of a crop harvest forming and transpiration as the two main bio-energetic factors of fertility. Transpiration is a thermodynamic process in an open self-organizing system, which has a dissipative random character. Transpiration consumes about 95 percent of the water consumed by the plant. (Purpose of research) The research objective is to obtain results confirming two hypotheses, according to which the efficiency of the process of crop formation is due to transpiration as a bio-energy factor of fertility and its components: photosynthetic exergy and thermal exergy. (Methods and materials) The basic principles of thermodynamic systems self-organization, as well as methods of experimental studies of the principle of subordination to the parameter of the order in which the system control variable is dependent on parameter of the order. The relation of the order parameter (thermal exergy of solar radiation (SR)) and the variable control (transpiration) was determined. The values of the correlation coefficients of these two processes have a value close to one. This confirms that transpiration is a dissipative self-organizing process underlying the transpiration irrigation mechanism. It is revealed that a fractal dimension of a time series of transpiration of cucumber with natural light, a potato is artificial, and their probability haracteristics: the mathematical expectation, standard deviation and variance. (Results and discussion) We received confirmation of the scientific hypothesis about the influence of limiting climatic factors on the theoretical limit of plant productivity and fractal dimension of transpiration as an indicator of production processes in crop production. (Conclusions) We put forward supplemental scientific hypothesis about the influence of limiting climatic factors on the theoretical limit of plant productivity. It was showed that under artificial light intensity of shoots of potatoes fractal dimension is equal to 1.1, and the variance of the temporary random number of transpiration series decreased more than 6 times compared to the same time series under natural light of SRПриведены предпосылки и результаты фундаментальных исследований, подтверждающие две гипотезы, касающиеся процесса формирования урожая и транспирации как основного биоэнергетического фактора плодородия. Транспирация есть термодинамический процесс в открытой самоорганизующейся системе, носящий диссипативный случайный характер. На транспирацию расходуется около 95 процентов потребляемой растением воды. (Цельисследования) Получить результаты, подтверждающие две гипотезы, согласно которым эффективность процесса формирования урожая обусловлена: транспирацией как биоэнергетическим фактором плодородия, фотосинтезной эксергией и тепловой эксергией. (Методы и материалы) Рассмотрены основные принципы самоорганизации термодинамических систем, а также методы экспериментальных исследований принципа подчинения параметру порядка, при котором переменная управления системы подчинена параметру порядка. Определили связь параметра порядка (тепловая эксергия солнечного излучения (СИ)) и переменной управления (транспирация). Значения коэффициентов корреляции этих двух процессов имеют величину, близкую к единице. Это подтверждает, что транспирация есть диссипативный самоорганизующийся процесс, лежащий в основе механизма транспирационного орошения. Выявили фрактальную размерность временного ряда транспирации огурца при естественном освещении, картофеля – при искусственном, а также их вероятностные характеристики: матожидание, среднеквадратическоеотклонение и дисперсия. (Результаты и обсуждение) Получили подтверждение научной гипотезы о влиянии лимитирующих климатических факторов на теоретический предел продуктивности растений и фрактальной размерности транспирации как индикатора продукционных процессов в растениеводстве. (Выводы) Дополнили научную гипотезу о влиянии лимитирующих климатических факторов на теоретический предел продуктивности растений. Показали, что при искусственном интенсивном освещении всходов картофеля фрактальная размерность равна 1,1, а дисперсия временного случайного ряда транспирации снизилась более чем в 6 раз по сравнению с аналогичным временным рядом при естественном освещении СИ
Two New Species of \u3ci\u3eHermeuptychia\u3c/i\u3e from North America and Three Neotype Designations (Nymphalidae: Satyrinae)
Abstract
Two new species of Hermeuptychia Forster, 1964 are described. Hermeuptychia sinuosa Grishin, sp. n. (type locality Guatemala: El Progreso, Morazán) is an isolated member of the genus that does not readily fit into known species groups, as suggested by its distinct male and female genitalia and COI DNA barcode sequences. It is distinguished from its congeners by prominently wavy submarginal lines, rounder wings and distinctive genitalia, and can typically be identified by a white dot, instead of an eyespot, near the ventral hindwing apex. Hermeuptychia occidentalis Grishin, sp. n. (type locality Mexico: Guerrero, Acapulco) belongs to the Hermeuptychia sosybius group as indicated by the presence of androconia on the dorsal surface of the wings, genitalia and COI DNA barcodes, and in addition to DNA characters, differs from its relatives in the shape of the uncus and female genitalia. Neotypes of Oreas strigata canthe Hübner, [1811] (type locality Suriname: Gelderland, Suriname River), Megisto acmenis Hübner, 1823 (type locality Argentina: Buenos Aires), and Satyrus cantheus Godart, [1824] (type locality USA: Florida, Pinellas County, St. Petersburg) and lectotype of Euptychia celmis var. bonaërensis [sic] Burmeister, 1878 (type locality Argentina: Buenos Aires) are designated. These designations establish Hermeuptychia canthe as a valid species widely distributed in South America from Colombia to Bolivia and southeast Brazil, Euptychia celmis var. bonaërensis [sic] Burmeister, 1878 as a junior objective synonym of Yphthimoides acmenis, and S. cantheus as a junior subjective synonym of Hermeuptychia sosybius (Fabricius, 1793). Papilio camerta Cramer, 1780 is treated as nomen dubium requiring further studies to determine an identity that is consistent with the original description, as it may be conspecific with Paryphthimoides poltys (Prittwitz, 1865) instead of being a Hermeuptychia species as currently assumed.
Resumen
Se describe dos nuevas especies de Hermeuptychia Forster, 1964. Hermeuptychia sinuosa Grishin, sp. n. (localidad tipo Guatemala: El Progreso, Morazán), es un componente aislado del género que no encaja fácilmente en los grupos de especies conocidas, como lo indica su distintiva genitalia masculina y femenina y las secuencias de ADN del código de barras COI. Se distingue de sus congéneres por tener líneas submarginales prominentemente onduladas, alas más redondas y genitales diferentes, y se puede identificar típicamente por un punto blanco, en lugar de una mancha ocular, cerca del ápice ventral del ala anterior. Hermeuptychia occidentalis Grishin, sp. n. (localidad tipo México: Guerrero, Acapulco) pertenece al grupo de Hermeuptychia sosybius como lo indica la presencia de androconia en las alas anteriores, la estructura genital y secuencias de ADN de la región del código de barras COI, y además de caracteres del ADN, se diferencia de sus parientes en la forma del uncus y la genitalia femenina. Se designa neotipos para Oreas strigata canthe Hübner, [1811] (localidad tipo Surinam: Gelderland, Río Surinam), Megisto acmenis Hübner, 1823 (localidad tipo Argentina: Buenos Aires), y Satyrus cantheus Godart, [1824] (localidad tipo Estados Unidos: Florida, Pinellas County, St. Petersburg), y el lectotipo de Euptychia celmis var. bonaërensis [sic] Burmeister, 1878 (localidad tipo Argentina: Buenos Aires). Estas designaciones establecen a Hermeuptychia canthe como una especie válida ampliamente distribuida en América del Sur desde Colombia hasta Bolivia y el sureste de Brasil, a Euptychia celmis var. bonaërensis [sic] Burmeister, 1878 como sinónimo objetivo más reciente de Yphthimoides acmenis, y a S. cantheus como sinónimo subjetivo más reciente de Hermeuptychia sosybius (Fabricius, 1793). Papilio camerta Cramer, 1780 es tratado como un nomen dubium requiriendo más estudios para determinar una identidad que sea consistente con la descripción original, ya que puede ser coespecífica con Paryphthimoides poltys (Prittwitz, 1865) en lugar de ser una especie de Hermeuptychia como se asume actualmente.
COI = c oxidase subunit
Biofriendly nanocomposite containers with inhibition properties for the protection of metallic surfaces
© 2017 The Author(s) Published by the Royal Society. All rights reserved.An attempt to combine two 'green' compounds in nanocomposite microcontainers in order to increase protection properties of waterborne acryl-styrene copolymer (ASC) coatings has been made. Nlauroylsarcosine (NLS) served as a corrosion inhibitor, and linseed oil (LO) as a carrier-forming component. LO is compatible with this copolymer and can impart to the coating self-healing properties. For the evaluation of the protective performance, three types of coatings were compared. In the first two, NLS was introduced in the coating formulation in the forms of free powder and micro-containers filled with LO, correspondingly. The last one was a standard ASC coating without inhibitor at all. Low-carbon steel substrates were coated by these formulations by spraying and subjected subsequently to the neutral salt spray test according to DIN ISO 9227. Results of these tests as well as the data obtained by electrochemical study suggest that such containers can be used for the improvement of adhesion of ASC-based coatings to the substrate and for the enhancement of their protective performance upon integrity damage, whereas the barrier properties of intact coatings were decreased
- …