bluuebunny/crossref_metadata_2025 huggingface dataset:
Keanekaragaman Jenis Kantong Semar (Nepenthes spp.) di Kawasan Taman Wisata Alam Baning Kabupaten Sintang Kalimantan Barat
Authors: Mukarlina Anggi Nurhadi Riza Linda
Published: December 2020

Baning Natural Tourism Site located in Sintang district is the habitat of Nepenthes spp. The aim of the study is to determine the spesies and diversity of Nepenthes spp. in Baning Tourism site. The study was conducted in April - May 2017.  Nepenthes spp. observation was done in 5 observation locations which was determined randomly based on the homogeneity of Nepenthes in Baning site with the total number of the observation area of 0.096 Ha. The results showed that there are 5 spesies of Nepenthes in Baning namely Nepenthes ampullaria, N. bicalcarata, N. mirabilis, N. gracilis, and N. x cantleyi. The diversity of Nepenthes spesies in Baning observation areas is to low, with the value of H' ranging from 1,075 to 0.616.
Komposisi Spesies Capung (Odonata) di Kawasan Cagar Alam Mandor Kecamatan Mandor Kabupaten Landak Kalimantan Barat
Authors: Kustiati Ayu Seftia Nur Wulandari, Tri Rima Setyawati,
Published: December 2020

Dragonfly is one of the predatory insect that can be used as an environmental bio-indicator. Mandor Nature Reserve forest area, which has 3.080 Ha, had changed due to illegal logging and illegal gold mining (PETI) giving a sustainable impact on its flora and fauna. This research aim was to determine the species of dragonfly found in the Mandor Nature Reserve area. The sampling was conducted in one month with the Purposive Random Sampling method. Adult species were collected fortnightly by using sweep nets. There were 182 individuals belonged to 2 suborders, 3 families, 11 genera, and 12 species of dragonflies found in Mandor Nature Reserve area. Two suborders are Zygoptera and Anisoptera, the three families are Coenagrionidae, Gomphidae and Liebellulidae. The most common species found of dragonflies is Cerinorubellum ceriagrion (33 individuals or 18%) and Nannophya pygmaea (29 individuals or 16%), Orthetrum sabina (23 individuals or 13%) and  the least common dragonfly is Periagrion microcephallum (4 individuals or 2.16%).
Aktivitas Antifungi Isolat Actinomycetes dari Sumber Air Panas Ai Sipatn Lotup Sanggau Terhadap Isolat Hortaea werneckii (T1)
Authors: Novik Nurhidayat Jerliman Manalu, Rahmawati,
Published: December 2020

Pathogenic fungi cause health problems especially the skin infection caused by Hortaea werneckii causes of tinea nigra skin disease. One of the method minimizes the problems and against the growth of Hortaea werneckii can use the active material from Actinomycetes bacteria as the antifungal. This research was to aware the kind of Actinomycetes bacteria that have the most potential as antifungal against the Hortaea werneckii, the effect of metabolic volume composition and incubation time of Actinomycetes bacteria against the Hortaea werneckii (T1). Antifungal activity test used the filtration method of Actinomycetes bacteria with parameters based on incubation time and volume comparison of metabolites concentration. Antifungal activity test of 11 isolates Actinomycetes bacteria produce six isolates Actinomycetes bacteria as the most potential antifungal and the percentage of the effect difference among the treatment against Hortaea werneckii (T1) are Thermoactinomyces sp. (H24) 39,98%, Thermoactinomyces sp. (H21) 29,11%, Thermobifida sp. (S311) 21,14%, Streptomyces sp. (S211) 34,21%, Actinomadura sp. (S21(2)) 24,70%, dan Nocardiopsis sp. (H22*1) 33,03%. Bacteria isolate Thermoactinomyces sp. (H24) have a significant percentage of antifungal with an average 97%, as a difference of the effect among treatments are 39,98%. The metabolites produced by Actinomycetes cause Hortaea werneckii (T1) growth to be inhibited and damage cells structure their.
Pengaruh Konsentrasi Biourin Kelinci Terhadap Pertumbuhan Vegetatif Bayam Batik (Amaranthus Tricolor L. var. Giti Merah)
Authors: Rafdinal Sy. Hasan Agil Riza Linda
Published: December 2020

Batik spinach (Amaranthus tricolor L.) is a plant that is rich in nutrients and can be used as diabetes medicine and dysentery. Therefore, increasing the growth of batik spinach plants needs to be done, one of which is the use of organic fertilizers, which can be used as rabbit biourin. The use of rabbit urine is done because rabbit urine has a high nutrient content compared to other livestock. The aim of the study was to determine the effect of biourin on the growth of batik spinach (Amaranthus tricolor L.). The study used a Completely Randomized Design (CRD) with 5 levels of concentration treatment consisting of controls, 25 ml / L, 30 ml / L, 35 ml / L, 40 ml / L, with 5 replications. The results showed that the administration of rabbit biourin significantly affected plant height, number of leaves, wet weight, dry weight and ratio of roots / canopy. The concentration of 25 ml / L gave the highest effect on the parameters of plant height, leaf number, root / crown ratio, wet weight, and dry weight.
Deteksi Keberadaan Bakteri Staphylococcus di Udara Dalam Ruangan Pasar Tradisional Kota Pontianak
Authors: Rikhsan Kurniatuhadi M. Arief Faturrahman, Rahmawati,
Published: December 2020

Bacteria belongs to the genus of Staphylococcus is pathogenic bacteria and its existence is an indicator of contaminated environment particularly in the air. The aim of this study is to detect the existence of bacteria belongs to Staphylococcus in the traditional market space of Pontianak city. The study was conducted in January - March 2018. Sampling was administered in 4 traditional markets of Pontianak City using volumetric air sampling along with a vacuum air pump YYP 550-12A1 with an air flow rate of 26 l / min for 6 minutes using Mannitol Salt Agar (MSA). The results showed that air bacteria member of the genus Staphylococcus found in all traditional markets in the city of Pontianak. The lowest number of bacteria belongs to the lowest Staphylococcus genus in the Flamboyan Market was 15 CFU/m3 and the highest was in Pasar Mawar 89 CFU/m3. The data indicates the air in the traditional market of Pontianak City has not fully fulfill the air health standards according to Sedyaningsih (2011), which is free of pathogenic bacteria 0 CFU/m3.
Aktivitas Antifungi Ekstrak Etanol Daun Eryngium foetidum L. Terhadap Pertumbuhan Xeromyces sp. secara in vitro
Authors: Rikhsan Kurniatuhadi Ines S Simatupang Elvi Rusmiyanto PW,
Published: December 2020

Eryngium foetidum is a plant commonly used a seasoning cuisine and has a variety of chemical compounds that potentially an antifungal. The ethanol extract Eryngium foetidum was tested against fungal isolate Xi.01. The isolat Xi.01 isolated from the pepper (Piper Nigrum) stem was identified as Xeromyces sp. This study aimed to determine the ability of the antifungal ethanol extract of Eryngium foetidum against Xeromyces sp. (Xi.01). This study used solid dilution method and completely randomized design using 18 treatments, i.e negative control, positive control, diethanolamide concentration of 2.5; 5; 7.5 and 10% combined with the ethanol extract concentration of Eryngium foetidum of 5; 10; 20 and 40%. The results showed 16 treatment combinations had the same low antifungal activity level in the range 13,59-22,40%
KEPADATAN JAMUR MIKORIZA VESIKULAR ARBUSKULAR (MVA) DI KAWASAN HUTAN MANGROVE DESA PENITI KABUPATEN MEMPAWAH KALIMANTAN BARAT
Authors: Hartini Hartini , Linda Riza , Rahmawati Rahmawati
Published: December 2020

Mycorrhizal fungi are fungi that are associated with higher levels of plants and are very important in plant growth. Mycorrhizal fungi can be found most of the land, one of which is in the mangrove forest. This study was conducted to determine the type of fungus and the percentage of infections in plant roots and fungal density of VAM found in the Mangrove Forest area at Mempawah Regency, West Kalimantan. This research was conducted at the Microbiology Laboratory of the Department of Biology, Faculty of Mathematics and Natural Sciences. Analysis of soil chemical content was carried out in the Laboratory of Chemical and Soil Fertility, Faculty of Agriculture, Tanjungpura University. Isolation of spores was carried out by wet filter method and continued with centrifugation. The results indicated that the spores found consisted of 3 genera were Glomus, Gigaspora and Paraglomus. The percentage of root infections by mycorrhizal fungi was classified as low at 10.65%, and density of VAM fungus spores in Parit Tanjung as many 13 spores, Kasim as many 10 spores, Sungai Burung as many 59 spores and Tanjung as many 33 spores.
Kajian Etnobotani Serat Kulit Kayu Kepuak (Artocarpus elasticus Reinw. ex Blume) Pada Suku Dayak Desa’di Desa Kunyai Kecamatan Sungai Tebelian Kabupaten Sintang
Authors: Veriyan Anci , Rafdinal Rafdinal , Linda Riza
Published: December 2020

Artocarpus elasticus is one of the bark fiber-producing plants. Fiber plants have many uses, one of them is being used by Dayak Desa’ Tribe to meet the needs of daily life in accordance with local wisdom. This study was carried out for two months from May to July 2019 with purposive sampling method. The result showed that the usage of bark fiber plants by Dayak Desa’ community in Kunyai Village was varied. Based on the percentage of respondents’ answers, bark fiber plants was used as crafts (100%), clothes (88%), ropes (60%), building materials (36%), and medicines (8%). Dayak Desa’ community knows and uses kepuak bark fiber well. The process of bark fiber was done by bark stripping, followed by bark flattening until it turns into sheets, and lastly submerged and dried
NILAI MPN (Most Probable Number) DAN DETEKSI BAKTERI Esherichia PADA MINUMAN ES JERUK PERAS di KOTA PONTIANAK
Authors: Ratna Ratna , Rahmawati Rahmawati , Mukarlina Mukarlina
Published: December 2020

Iced squeezed orange drinks is one one of processed drinks that made from orange. Good drinking water should not contain pathogenic bacteria or organisms that may harm human health. Coliform is one ofbacteria that may cause disease in humans and being used as indicator bacteria of pathogenic bacteria. This research was aimed to know the MPN value number of coliform bacteria and to identify the bacterial presence of genus Escherichia in iced squeezed orange drinks sold in Pontianak City. The sampling used random sampling method. MPN method was used in order to know the number of coliform in iced squeezed orange drinks in Pontianak City. MPN test result obtained the lowest index value of MPN/mL was 0,14/mL in sample in subdistrict Pontianak City and the highest index value in four subdistricts in Pontianak City was MPN/mL >24,00/mL. It was showed that five samples exceed normal limits in accordance with SNI standards SNI 01-3839-1995 based on Permenkes No 492/MENKES/per/IV/2010. Identification resultshowed the bacterial genus of coliform obtained was member of genus Escherichia.
PERTUMBUHAN KEDELAI (Glycine max [L.] Merrill) VARIETAS ANJASMORO DENGAN PEMBERIAN BIOURIN KAMBING (Capra aegagrus hircus)
Authors: Hamid Abd. , Linda Riza , Mukarlina Mukarlina
Published: December 2020

Soybean (Glycine max [L.] Merrill) Anjasmoro variety is one of the superior soybean varieties widely cultivated in West Kalimantan. The growth of soybean can be increased by applying liquid organic fertilizer namely goat biourine. The purpose of this study was to determine the goat biourine quality and the effect of the application of goat biourine on the growth of Anjasmoro variety soybean plants. This study uses a Completely Randomized Design (CRD) consisting of five treatments, namely without biourine/control, 100 mL/L biourine, 200 mL/L biourine, 300 biourine mL/L and  400 mL/L biourine. Each treatment was repeated 5 times to obtain 25 experimental units. The analysis of goat biourine showed the value of C-Organic 2.03%, pH 4.83, N 0.72%, P 0.004% and K 0.234%. The results showed that apply of goat biourine had a significant effect on plant height, number of leaves, shoot wet of weight, shoot dry of weight, number of branches, number of root nodules and the number of effective root nodules, but it had not a significant effect on root wet of weight and root dry of weight.
Fairy-tale therapy as a way to combat phobias
Authors: Gordon T. S.
Published: December 2020

The article considers the fairy-tale therapy as one of the most effective methods to combat phobias and anxiety in primary school age. The author analyses the main aspects of the fairy-tale work, studies its forms, provides examples of creative thinking of primary school pupils, helping to overcome fear and anxiety. Connecting the mind and imagination of a younger schoolboy, the fairy tale helps him find ways and ways to get rid of phobias, aggression and anxiety. The article considers the fairy tale as a tool that presents algorithms for solving specific problems or conflict situations, the consequences of circumstances with a concentrated component of low-frequency emotions, as well as a way to give strength to further fight against fears or even annihilating them. The paper also reviews four types of fairy tales used in therapeutic activities with younger pupils, which have a different mechanism of psychological influence.
Empathy as a professionally significant quality of a modern blogger’s personality
Authors: Kurasova O. V. , Iontseva M. V.
Published: December 2020

This article considers empathy as a professionally significant personal quality of a modern blogger, analyses theoretical approaches of domestic and foreign researchers to the study of empathy, characterizes forms and types of empathy. The paper gives definition of blogging, describes the specifics of the blogger’s activities, taking into account the peculiarities of the online environment, and analyses the most successful bloggers of Russia. The authors describe a theoretical model of empathy and carry out an empirical study aimed at identifying professionally significant qualities of a blogger’s personality. The study considers such characteristics of a blogger as interesting content, successfulness, popularity, awareness of the topic, emotional closeness, common interests, values with subscribers and others
The role of conical intersections on the efficiency of fluorescent organic molecular crystals
Authors: Rivera Miguel , Stojanovic Ljiljana , Crespo Otero Rachel
Published: December 2020

Organic molecular crystals are attractive materials for luminescent applications due to their promised tunability. However, the link between chemical structure and emissive behaviour is poorly understood due to the numerous interconnected factors which are at play in determining radiative and non-radiative behaviours at the solid state level. In particular, the decay through conical intersection dominates the nonadiabatic regions of the potential energy surface, and thus their accessibility is a telling indicator of the luminosity of the material. In this study, we investigate the radiative mechanism for five organic molecular crystals which display solid state emission, with a focus on the role of conical intersections in their photomechanisms. The objective is to situate the importance of the accessibility of conical intersections with regards to emissive behaviour, taking into account other nonradiative decay channels, namely vibrational decay, and exciton hopping. We begin by giving a brief overview of the structural patterns of the five systems within a larger pool of thirteen crystals for a richer comparison. We observe that due to the prevalence of sheet-like and herringbone packing in organic molecular crystals, the conformational diversity of crystal dimers is limited. Additionally, similarly spaced dimers have exciton coupling values of similar order within a 50 meV interval. Next, we focus on three exemplary cases, where we disentangle the role of nonradiative decay mechanisms and show how rotational minimum energy conical intersections in vacuum lead to puckered ones in crystal, increasing their instability upon crystallisation in typical packing motifs. In contrast, molecules with puckered conical intersections in vacuum tend to conserve this trait upon crystallisation, and therefore their quantum yield of fluorescence is determined predominantly by other nonradiative decay mechanisms.
Asymmetric Three-Component Olefin Dicarbofunctionalization Enabled by Photoredox and Copper Dual Catalysis
Authors: Wang Peng-Zi , Gao Yuan , Chen Jun , Huan Xiao-Die , Xiao Wen-Jing , Chen Jia-Rong
Published: December 2020

An intermolecular, enantioselective three-component radical vicinal dicarbofunctionalization reaction of olefins enabled by merger of radical addition and cross-coupling using photoredox and copper dual catalysis is presented here. Key to the success of this protocol relies on chemoselective addition of acyl and cyanoalkyl radicals, generated in situ from the redox-active oxime esters by a photocatalytic N-centered iminyl radical-triggered C-C bond cleavage event, onto the alkenes to form new carbon radicals. Single electron metalation of such newly formed carbon radicals to TMSCN-derived L1Cu(II)(CN)2 complex leads to asymmetric cross-coupling. This three-component process proceeds under mild conditions, and tolerates a diverse range of functionalities and synthetic handles, leading to valuable optically active β–cyano ketones and alkyldinitriles, respectively, in a highly enantioselective manner (> 60 examples, up to 97% ee).
Exploring the Utility of Compound-Specific Isotope Analysis for Assessing Ferrous Iron-Mediated Reduction of RDX in the Subsurface
Authors: Tong Yiran , Berens Matthew J. , Ulrich Bridget A. , Bolotin Jakov , Strehlau Jennifer H. , Hofstetter Thomas , Arnold William
Published: December 2020

This work determines isotope enrichment factors for RDX during reduction by iron minerals. The values determined are used to assess the transformation of RDX at a site with groundwater contamination and in laboratory column reactors simulating in situ chemical reduction treatment.
Quantifying the Long-Range Coupling of Electronic Properties in Proteins with Ab Initio Molecular Dynamics
Authors: Yang Zhongyue , Hajlasz Natalia , Steeves Adam , Kulik Heather
Published: December 2020

A delicate interplay of covalent and noncovalent interactions gives proteins their unique ability to flexibly play numerous roles in cellular processes. This interplay is inherently quantum mechanical and highly dynamic in nature. To directly interrogate the evolving nature of the electronic structure of proteins, we carry out 100-ps-scale ab initio molecular dynamics simulations of three representative small proteins with range-separated hybrid density functional theory. We quantify the nature and length-scale of the coupling of residue-specific charge probability distributions in these proteins. While some nonpolar residues exhibit expectedly narrow charge distributions, most polar and charged residues exhibit broad, multimodal distributions. Even for nonpolar residues, we observe sequence-specific deviations corresponding to charge accumulation or depletion that would be challenging to capture in a fixed charge force field. We quantify the effect of residue–residue interactions on charge distributions first with linear cross-correlations. We then show how additional insight can be gained from evaluating the mutual information of charge distributions. We show that a significant number of residues couple most strongly with residues that are distant in both sequence and space over a range of secondary structures including a-helical, b-sheet, disulfide bridging, and lasso motifs. The mutual information analysis is necessary to capture coupling between some polar and charged residues. These analyses are expected to be broadly useful in understanding the mechanisms of long-range charge transfer in proteins and for determining what interactions require a quantum mechanical description for predictive simulation of enzyme mechanism and protein function.
INFLUENCE OF ACTIVE ACIDITY OF THE MEDIUM ON THE STABILITY OF MNO NANOPARTICLES
Authors: Блинов Андрей Владимирович , Маглакелидзе Давид Гурамиевич , Кравцов Александр Александрович , Блинова Анастасия Александровна , Гвозденко Алексей Алексеевич , Голик Алексей Борисович , Раффа Владислав Викторович , Коновалова Екатерина Васильевна
Published: December 2020

В работе впервые представлены результаты исследования микроструктуры наночастиц диоксида марганца, стабилизированных серосодержащими аминокислотами. По результатам сканирующей электронной микроскопии обнаружено наличие в образцах наночастиц диаметром 15 - 30 нм. С помощью спектрофотомерии установлены оптимальные массовые соотношения прекурсоров для получения стабильных золей наночастиц диоксида марганца, которые составляют KMnO: метионин - 1:1 и KMnO: цистеин - 3:1. Исследование влияния активной кислотности среды на стабильность наночастиц диоксида марганца показало, что образцы MnO, полученные с использованием метионина, стабильны при 4 ≤ pH ≤ 11, а с использованием цистеина стабильны при 5 ≤ pH ≤ 8.

In this work, for the first time the results of studying the microstructure of manganese dioxide nanoparticles stabilized with sulfur-containing amino acids are presented. According to the results of scanning electron microscopy, nanoparticles with a diameter of 15 - 30 nm were presented in the samples. The optimal mass ratios of precursors were established by means of spectrophotometry, to obtain stable sols of manganese dioxide nanoparticles. The optimal mass ratios were: KMnO : methionine - 1:1 and KMnO : cysteine - 3:1. Investigation of the effect of the medium active acidity on the stability of manganese dioxide nanoparticles showed that MnO samples obtained with methionine are stable at 4 ≤ pH ≤ 11, and with cysteine - at 5 ≤ pH ≤ 8 .
THE SIZE DEPENDENCIES OF PROPERTIES OF MO-W ALLOY OF EQUIATOMIC COMPOSITION
Authors: Крамынин Сергей Петрович
Published: December 2020

Основываясь на параметрах парного потенциала межатомного взаимодействия Ми-Леннард-Джонса для Mo и W были рассчитаны параметры потенциала для сплава замещения Mo - W эквиатомного состава. Получены размерные зависимости для уравнения состояния, модуля упругости, коэффициента теплового расширения, изобарной теплоемкости, поверхностной энергии и производной поверхностной энергии по температуре. Также получены температурные зависимости коэффициента теплового расширения изобарной теплоемкости для макро- и нанокристаллов сплава Mo - W. Было показано, что температурная зависимость коэффициента теплового объемного расширения для нанокристалла лежит выше, чем зависимость для макрокристалла, также обнаружено, что с уменьшением размера уменьшается модуль упругости, коэффициент теплового объемного расширения возрастает, а удельная поверхностная энергия нанокристалла сплава Mo - W уменьшается.

Based on the parameters of the Mie-Lennard-Jones pair-wised potential of the interatomic interaction for Mo and W , the potential parameters for an equiatomic Mo - W substitution alloy were calculated. Size dependences for the equation of state, modulus of elasticity, coefficient of thermal expansion, isobaric heat capacity, surface energy and surface energy temperature derivative were obtained. Temperature dependencies of coefficient of thermal expansion and isobaric heat capacity for macro- and nano-crystals of Mo - W alloy were also obtained. It was shown that the temperature dependence of the thermal expansion coefficient for a nanocrystal is higher than that for a macrocrystal. It was also found that with a decrease in size, the elastic modulus decreases, the thermal volume expansion coefficient increases, and the specific surface energy of the alloy nanocrystal Mo - W decreases.
CONCENTRATION THRESHOLD IN LINBO:TB CRYSTALS
Authors: Палатников Михаил Николаевич , Сидоров Николай Васильевич , Кадетова Александра Владимировна , Теплякова Наталья Александровна , Макарова Ольга Викторовна
Published: December 2020

Выращена серия кристаллов ниобата лития, легированных тербием. Исследованы процессы кристаллизации кристаллов LiNbO:Tb ([Tb] = 0,1-2,89 мас.%) и концентрационные зависимости их структурных характеристик. Проведены сравнительные исследования фоторефрактивных свойств кристаллов LiNbO:Tb различного химического состава. В кристаллах LiNbO:Tb обнаружен концентрационный порог вблизи [Tb]~2,2-2,3 мас.%, в области которого наблюдаются аномалии физико-химических, оптических и структурных характеристик.

A series of lithium niobate crystals doped with terbium was grown. Processes of crystallization and concentration dependences of structural characteristics were studied in LiNbO:Tb ([Tb] = 0,1-2,89 wt%) crystals. Comparative studies of the photorefractive properties of crystals LiNbO:Tb of various chemical composition are carried out. A concentration threshold was determined in LiNbO:Tb crystals near [Tb]~ 2.2-2.3 wt%. Anomalies of physic-chemical, optical and structural characteristics are observed in this area.
AB INITIO CALCULATIONS OF THE CRYSTALLINE AND ELECTRONIC STRUCTURE OF 5-7 FLUOROGRAPHENE VARIETIES
Authors: Беленков Максим Евгеньевич , Чернов Владимир Михайлович
Published: December 2020

Первопринципные расчеты структуры и электронных свойств двух новых полиморфных разновидностей фторографена были выполнены методом теории функционала плотности. Новые слои фторографена могут формироваться при химической адсорбции фтора на поверхности 5 - 7 графеновых слоев. Структура слоя первого типа более деформирована по сравнению со структурой второго типа (деформационные параметры Def = 60,48° и Def = 31,51° ). Энергии сублимации и ширины запрещенных зон составляют 13,85, 14,17 эВ/(CF), и 4,09, 3,32 эВ для CF - L слоев T1, T2 типов соответственно.

First-principle calculations of the structural and electronic properties of two new polymorphic varieties of fluorographene were performed using the density functional theory method. New layers of fluorographene can be formed during chemical adsorption of fluorine on the surface of 5 - 7 graphene layers. The structure of the layer of the first type is more deformed in comparison with the structure of the second type (deformation parameters Def = 60,48 ° and Def = 31,51 °). Sublimation energies and band gaps are 13,85, 14,17 eV/(CF), and 4,09, 3,32 eV for CF-L layers of T1, T 2 types, respectively.
STRUCTURE AND STABILITY OF A TETRAGONAL DIAMOND-LIKE LAYER: FIRST-PRINCIPLE CALCULATIONS
Authors: Грешняков Владимир Андреевич , Беленков Евгений Анатольевич
Published: December 2020

Методом теории функционала плотности было выполнено теоретическое исследование нового слоевого полиморфа алмаза DL, состоящего из двух полимеризованных тетрагональных графеновых слоев L. Установлено, что новый алмазоподобный слой имеет двумерную тетрагональную решетку с параметром a = b = 0,3822 нм и толщиной 0,1599 нм. Рассчитанные поверхностная плотность и ширина запрещенной зоны этого слоя равны 0,109 мкг/см и 2,63 эВ, соответственно. Новый слой DL должен быть устойчивым, как минимум, до 220 К. Также установлено, что слой DL может быть получен при сильном одноосном сжатии двух графеновых слоев L при давлении 29,6 ГПа.

Using the density functional theory method, a theoretical study of a novel layered DL polymorph of diamond, consisting of two polymerized tetragonal graphene L layers, was performed. It was established that the new diamond-like layer has a two-dimensional tetragonal lattice with the parameter a = b = 0,3822 nm and a thickness of 0,1599 nm. The calculated surface density and band gap of this layer are 0,109 μg/cm and 2,63 eV, respectively. The new DL layer must be stable up to at least 220 K. It was also found that the DL layer can be obtained by strong uniaxial compression of two graphene L layers at a pressure of 29,6 GPa.
COMPARATIVE ANALYSIS OF RESULTS OF NUMERICAL MODELING OF MECHANICAL BEHAVIOR OF GRAPHENE AND SILICENE IN THE FRAMES OF COMMON HARMONIC FIELD
Authors: Журавков Михаил Анатольевич , Нагорный Юрий Евгеньевич , Политаев Дмитрий Николаевич
Published: December 2020

В статье представлены результаты применения модели общего гармонического поля для численного моделирования механических свойств близких по геометрической форме образцов наноструктур графена и силицена. Проведён расчёт коэффициентов жёсткости элементов для этой модели на основе жёсткостей пары базовых через собственные частоты колебаний трёхузловых фрагментов. Приведены зависимости упругих модулей от линейных размеров. В обоих случаях наблюдается рост модуля продольной упругости с выходом на асимптоту при увеличении длины образца и очень слабая зависимость от его ширины. Коэффициент поперечной деформации уменьшается с ростом ширины. Увеличение длины даёт у графена рост данного показателя, а у силицена - его снижение.

The article presents the results of application of the general harmonic field model for numerical modeling of mechanical properties of samples of graphene and silicene nanostructures similar in geometric form. A calculation of the stiffness coefficients of the elements for this model was made based on the stiffness of a pair of basic ones through the natural frequencies of oscillations of three-node fragments. Dependencies of elastic modules on linear dimensions for examined samples are given. In both cases, there is an increase in the modulus of longitudinal elasticity with an increase in asymptote with an increase in the length of the sample and a very weak dependence on its width. The coefficient of transverse strain decreases as the width increases. Increasing the length gives graphene an increase in this indicator, and in silicene - its decrease.
GENERATION OF INITIAL CONFIGURATIONS OF METAL NANOCLUSTER ISOMERS: ALGORITHMS AND THEIR APPROBATION
Authors: Пуйтов Владимир Владимирович , Талызин Игорь Владимирович , Васильев Сергей Александрович , Самсонов Владимир Михайлович
Published: December 2020

Разработаны и апробированы алгоритмы генерации начальных конфигураций икосаэдрических, декаэдрических и кубооктаэдрических нанокластеров. Алгоритмы и соответствующие компьютерные программы апробированы на примере изомеров нанокластеров Au. С использованием молекулярной динамики исследованы закономерности термоиндуцированных структурных превращений в наночастицах золота с исходной кубооктаэдрической конфигурацией. Установлено, что плавлению кубооктаэдров предшествует их переход в икосаэдрические изомеры.

Algorithms for generating the initial configurations of icosahedral, decahedral and cuboctahedral nanoclusters have been developed and verified. Algorithms and corresponding computer programs have been approbated on the gold nanocluster isomers. Molecular dynamics was also employed to study the regularities of the thermally induced structural transformations in gold nanoparticles with the initial cuboctahedral configuration. It was found that the melting of cuboctahedra is preceded by their transition into icosahedral isomers.
INVESTIGATION OF SINTERING FEATURES OF CERAMIC MATERIALS BASED ON HYDROXYAPATITE AND ITS SUBSTITUTED FORMS
Authors: Богданова Екатерина Анатольевна , Веретенникова Ирина Андреевна
Published: December 2020

Порошки стехиометрического и фторзамещенного гидроксиапатита с повышенной активностью к спеканию (температура начала уплотнения составляет 600°С) синтезированы методом осаждения из раствора. Исследованы свойства синтезированных порошков и керамики после обжига. Показано, что введение фторид-ионов позволяет термически стабилизировать фазу апатита до температуры 1000°С, повысить степень дисперсности и площадь удельной поверхности, почти в три раза увеличить микротвердость материала. Сопоставление распределения частиц по размерам в синтезированных порошках и распределения зерен в спеченной керамике подтвердили наследование керамикой наноструктуры исходных порошков.

Stoichiometric and fluorsubstituted hydroxyapatite powders with increased sintering activity (the initial compaction temperature is 600°C) were synthesized by precipitation from solutions. Properties of synthesized powders and ceramics after firing were investigated. It is shown that the introduction of fluoride ions can thermally stabilize the apatite phase to a temperature of 1000 °C, increase the degree of dispersion and the specific surface area, and almost three times increase the microhardness of the material. Comparison of the particle size distribution in synthesized powders and the grain distribution in sintered ceramics confirmed that ceramics inherited the nanostructure of the original powders.
INFLUENCE OF THERMAL ANNEALING ON THE STRUCTURE AND OPTICAL PROPERTIES OF THIN ALUMINUM NITRIDE FILMS ON SAPPHIRE
Authors: Девицкий Олег Васильевич , Кравцов Александр Александрович , Пащенко Александр Сергеевич , Сысоев Игорь Александрович
Published: December 2020

Представлены результаты экспериментального исследования влияния термического отжига на структуру, морфологию поверхности и оптические свойства тонких пленок нитрида алюминия на сапфире. Тонкие пленки нитрида алюминия на сапфире толщиной 200 нм отжигались на воздухе и в атмосфере азота при остаточном давлении газов в вакуумной камере установки ионно-лучевого осаждения не менее 100 Па при температуре 850 °C. Установлено, что при термическом отжиге пленок нитрида алюминия на сапфире в атмосфере азота происходит уменьшение среднеквадратичной шероховатости пленок до 0,8 нм, увеличение коэффициента пропускания в диапазоне длин волн 300 -1100 нм вплоть до 96 %, а также повышение стехиометрии пленок. Показано, что для пленок нитрида алюминия на сапфире, отожжённых на воздухе, происходит окисление нитрида алюминия с образованием аморфного оксида алюминия при температуре 850 °C. Результаты энергодисперсионного анализа показали полное отсутствие азота на поверхности этих пленок. Снижение коэффициента пропускания во всем диапазоне длин волн для пленок AlN, отожжённых на воздухе, делает их не пригодными для применения в оптоэлектронике. Морфология поверхности этих пленок представляет собой массив остроконечных образований с максимальной высотой 190,7 нм и среднеарифметической шероховатостью поверхности 3,7 нм.

The results of an experimental study of the effect of thermal annealing on the structure, surface morphology and optical properties of thin films of aluminum nitride on sapphire are presented. Thin films of aluminum nitride on sapphire with a thickness of 200 nm were annealed in air and in a nitrogen atmosphere at a residual gas pressure in the vacuum chamber of the ion-beam deposition unit of no less than 100 Pa at a temperature of 850 °C. It was found that thermal annealing of aluminum nitride films on sapphire in a nitrogen atmosphere leads to a decrease in the root mean square roughness of the films to 0,8 nm, an increase in the transmittance in the wavelength range of 300 -1100 nm up to 96 %, and an increase in the stoichiometry of the films. It is shown that for aluminum nitride films annealed in air on sapphire, aluminum nitride is oxidized to form amorphous aluminum oxide at a temperature of 850 °C. The results of energy dispersive analysis showed the complete absence of nitrogen on the surface of these films. A decrease in the transmittance over the entire wavelength range for films AlN annealed in air makes them unsuitable for use in optoelectronics. The surface morphology of these films is an array of pointed formations with a maximum height 190,7 nm and an arithmetic mean surface roughness 3,7 nm.
ILLUMINATION EFFECT ON RECOGNITION ABILITY OF MULTISENSOR MICROSYSTEMS BASED ON TIN OXIDE NANOWHISKERS
Authors: Синёв Илья Владимирович , Клычков Никита Александрович , Тимошенко Дмитрий Александрович , Симаков Вячеслав Владимирович
Published: December 2020

С помощью стандартных методов классификации данных показана возможность распознавания газовых смесей с помощью мультисенсорной микросистемы с газочувствительным слоем на основе нитевидных нанокристаллов. Проведенный статистический анализ экспериментальных результатов показал, что освещение светодиодом в ультрафиолетовом диапазоне газочувствительного слоя диоксида олова значительно увеличивает медианное расстояние Евклида-Махаланобиса между классами (распознавательная способность) различных газовых проб по сравнению с результатами измерений в темноте. Высказана гипотеза о том, что повышение распознавательной способности мультисенсорной микросистемы связано с селективным влиянием освещения на поверхностные химические реакции активных форм кислорода и частицами анализируемых газов.

Using standard methods of data classification, the possibility of recognizing gas mixtures using a multisensor microsystem with a gas-sensitive layer based on whisker nanocrystals is shown. The statistical analysis of the experimental results showed that the illumination of a gas-sensitive layer of tin dioxide with a LED in the ultraviolet range significant increases the median Euclidean-Mahalanobis distance between the classes (recognition ability) of various gas samples compared to the results of measurements in the dark. Suggested that the increase in the recognition ability of a multisensor microsystem is associated with the selective effect of illumination on surface chemical reactions of oxygen species and particles of analyzed gases.
STRUCTURE AND PROPERTIES OF THE SURFACE LAYER HIGH CHROME AUSTENITIC STEEL, SUBMITTED TO ION-PLASMA NITROGEN
Authors: Иванов Юрий Федорович , Петрикова Елизавета Алексеевна , Лыков Сергей Витальевич , Денисова Юлия Александровна , Толкачев Олег Сергеевич
Published: December 2020

Ионное азотирование является одним из наиболее распространенных способов поверхностного упрочнения деталей и инструмента. Цель настоящей работы - выявление и анализ закономерностей преобразования структуры и свойств поверхностного слоя высокохромистой нержавеющей стали, подвергнутой низкотемпературному азотированию в плазме газового разряда низкого давления. Установлено, что насыщение азотом (793 К, 3 час.) аустенитной высокохромистой стали 202318 в плазме газового разряда низкого давления сопровождается формированием в слое толщиной (55 - 60) мкм структуры пластинчатого типа с чередующимися пластинами аустенита и нитрида железа (поперечные размеры пластин не превышают 10 нм), микротвердость и износостойкость которой превышают в 6,5 раз и более чем в 400 раз соответствующие характеристики исходного состояния.

Ion nitriding is one of the most common methods of surface hardening of parts and tools. The purpose of this work is to identify and analyze the laws governing the transformation of the structure and properties of the surface layer of high-chromium stainless steel subjected to low-temperature nitriding in a low-pressure gas discharge plasma. It was found that the saturation with nitrogen (793 K, 3 hours) of austenitic high-chromium steel 20X23H18 in a low-pressure gas discharge plasma is accompanied by the formation of a plate type structure with alternating plates of austenite and iron nitride in a layer (55 - 60) µm thick (transverse plate sizes do not exceed 10 nm), the microhardness and wear resistance of which exceed the microhardness of the initial state by 6,5 times, wear resistance - more than 400 times.
ADSORPTION AND DILATIONAL RHEOLOGICAL PROPERTIES OF CHITOSAN LACTATE AT THE LIQUID-GAS INTERFACE
Authors: Ковтун Анна Игоревна
Published: December 2020

Методом формы осциллирующей капли исследованы адсорбционные и дилатационные реологические характеристики (модуль упругости и вязкости) лактата хитозана на границе раздела жидкость - газ. Определены зависимости динамического и равновесного поверхностного натяжения от концентрации лактата хитозана в растворе. Установлено, что полученные зависимости сходны с таковыми для поверхностноактивных высокомолекулярных соединений. Изучены зависимости поверхностных упругости и вязкости лактата хитозана от частоты осцилляций и концентрации. Показано, что лактат хитозана способен образовывать упругие адсорбционные слои со значениями модуля вязкоупругости сопоставимыми для биополимеров белковой природы.

The adsorption and dilatational rheological characteristics (the elasticity and viscosity modulus) of chitosan lactate at the liquid-gas interface are investigated by the oscillating drop shape method. The dependences of the dynamic and equilibrium surface tension on the concentration of chitosan lactate in solution have been determined. It was found that the dependences obtained are similar to those for surface-active high-molecular weight compounds. The dependences of the surface elasticity and viscosity of chitosan lactate on the oscillation frequency and concentration have been studied. It has been shown that chitosan lactate is capable of forming elastic adsorption layers with the values of the viscoelastic modulus comparable to that of protein biopolymers.
BIBLICAL EXPRESSION «BEAR ONE’S CROSS»: THE SPECIFICS OF COMPREHENSION IN THE GERMAN AND RUSSIAN CULTURE
Authors: Туркова-Зарайская Мария Олеговна
Published: December 2020

Статья посвящена особенностям понимания одного из самых употребительных библейских прецедентных высказываний - НЕСТИ СВОЙ КРЕСТ - представителями немецкого и русского лингвокультурных сообществ. Делаются выводы относительно общих черт и различий в понимании библеизма, детерминированных особенностями исторического и культурного развития России и Германии.

The paper is devoted to the specifics of the comprehension of one of the most common biblical precedent expressions - BEAR ONE’S CROSS - by the members of the German and Russian linguocultural community. Conclusions about common features and differences in the comprehension of this expression are made, conditional on the specifics of the historical and cultural development of Russia and Germany.
TOWARDS LINGUISTIC PARAMETERS OF FIELD DEPENDENCE/FIELD INDEPENDENCE COGNITIVE STYLE
Authors: Степанова Ирина Александровна
Published: December 2020

Анализируются характеристики параметров языковой личности на основе концепции когнитивных стилей. Дается детальное описание стиля «полезависимость/поленезависимость» и методики выявления полюсов этого стиля. Исследуются языковые реализации текстовой репродуктивной деятельности респондентов. Рассмотрен экспонентный уровень языковой личности - семантикосинтаксические особенности вторичной вербализации текста носителями данного когнитивного стиля.

The article describes parameters of the linguistic persona within the concept of cognitive styles. The opposite poles of the field-dependency style continuum are characterized, as well as the techniques of detecting respondent belonging to the poles. The author characterizes language manifestations of the respondent textual reproduction activities. The exponential level of the linguistic persona is described from the angle of the semantic-syntactic features of the secondary text verbalization by the style holders.
REFLECTION OF NATIONAL AND CULTURAL SPECIFICS IN NATIONALLY BIASED UNITS-ANTHROPONYMS OF RUSSIAN GERMANS’ PROVERBS
Authors: Жилина Юлия Сергеевна
Published: December 2020

В статье ставится задача проанализировать общий корпус пословиц и поговорок российских немцев и выделить наиболее встречающиеся группы антропонимов. Представленная в статье проблема является актуальной и интересной, так как многие имена собственные, к которым относятся и антропонимы, этимологически непонятны сегодня, но хранят ценную информацию, извлекаемую из них представителями разных наук. Встретившиеся группы реалий-антропонимов были рассмотрены более подробно и сделаны предположения о частоте и целях употребления каждой группы. В статье освещается опыт исследователей из Вятского государственного университета, а также используется метод комплексного анализа при сборе и обработке языкового материала носителей немецких островных диалектов.

The article intends to analyze the general structure of proverbs used by Russian Germans and identify the most frequent groups of anthroponyms. It is demonstrated that many proper nouns including anthroponyms are etymologically incomprehensible today but they keep valuable information that can be revealed. The article is based on the research conducted at Vyatka State University and the multivariate analysis methodology used during gathering and processing of insular dialect speakers’ language material.
Plants without borders: new records of two presumed Thai endemic Gesneriaceae in Laos
Authors: Panyadee P. , Tanming W. , Maknoi C.
Published: December 2020

Botanical expeditions in Laos through a collaboration between Thailand (Queen Sirikit Botanic Garden) and Laos (Pha Tad Ke Botanic Garden) to document plant diversity and collect plants for ex situ conservation, led to the discovery of two species of Gesneriaceae previously believed to be endemic to Thailand: Damrongia trisepala (Barnett) D.J.Middleton & A.Weber and Didymocarpus formosus Nangngam & D.J.Middleton. Information on these species is provided.
Hedychium mechukanum (Zingiberaceae), a new species from the eastern Himalayas, India
Authors: Sabu M. , Hareesh V.S.
Published: December 2020

The new species Hedychium mechukanum M.Sabu & Hareesh is described from Arunachal Pradesh, India. It shows similarities to Hedychium urophyllum G.Lodd., H. coronarium J.Koenig, H. flavum Roxb. and H. chrysoleucum Hook. from Northeast India, and to H. qingchengense Z.Y.Zhu from China. A detailed description along with colour photographs are provided for ease of identification.
Pranayama Yoga and Music Therapy: A Holistic Rehabilitation Therapy Combination for Chronic Obstructive Pulmonary Disease Patient
Authors: Aryadi I Putu Hendri , Yusari I Gusti Agung Ayu Andra , Iqra Haikal Hamas Putra
Published: December 2020

The management of certain health disorder can be done through a combination of conventional methods, namely with medicine, as well as traditional in a holistic (comprehensive) manner. The same also can be done for people with chronic obstructive pulmonary disease (COPD). Breath training technique and self-relaxation can be used as a complement, in addition to the consumption of drugs. Yoga pranayama combined with music therapy is a new rehabilitation therapy combination that can be implemented. This study was a narrative literature review composed by original articles and reviews written in English, aims to determine the potential of a combination of yoga pranayama and music therapy as a holistic rehabilitation therapy in patients with COPD. That therapy combination has been proven capable by some literatures in reducing dyspnea, increasing lung capacity and oxygen saturation, improving fitness and minimizing anxiety level, however, there were not any studies that ensure the potency of this therapy combination in COPD patients, therefore further research should be addressed.
A escola rural mineira em meio ao analfabetismo, ao êxodo rural e à expansão demográfica
Authors: Araujo José Carlos Souza
Published: December 2020

O objeto deste é investigar sobre a escola rural mineira em seu movimento de institucionalização, no decorrer do período entre os anos de 1930 e 1961, em torno do qual também se movimentava a paulatina constituição do tecido urbano ou, como quer Henri Lefebvre (2004), o processo de corrosão dos resíduos de vida agrária. A referida periodização se explicita, por um lado, pelos marcos designados por Revolução de 1930, entre os quais se encontra a denominada Era Vargas (1930-1945) – que foi responsável pela criação do Ministério da Educação e Saúde Pública em 14/11/1930, poucos dias após a posse em 03/11/1930, além de outras realizações na área educacional - e pela Lei n° 4.024, de 20 de dezembro de 1961, que fixou as Diretrizes e Bases da Educação Nacional (a primeira LDB). Trata-se de uma pesquisa documental, fundada nas mensagens dos governadores do Estado de Minas Gerais e em algumas mensagens dos Presidentes da República, mas associada às estatísticas educacionais presentes não somente nas mensagens mineiras. Em termos de problematização histórico-educacional, a qual é correlata à hipótese, o enfrentamento de tal objeto implica três aspectos correlatos: analfabetismo, êxodo rural e crescimento demográfico nas décadas demarcadas pela periodização.