bluuebunny/crossref_metadata_2025_split huggingface dataset:
On some prospects for further development of Academician V.N. Antsiferov ideas in the field of structural powder materials
Authors: Dorofeyev V. Yu. 
Published: March 2019

The paper discusses the further development of some ideas of V.N. Antsiferov and the scholar school created by him in obtaining structural powder materials and products. The prospects for obtaining concentration-inhomogeneous steels and trip-steels are noted. The great potential lies in the control of the thickness and volume of the zone of deformation martensitic transformation occurring during fracture. It is advisable to continue the preparation of fullerene- and nitrogen-containing powder compositions and to study the structural heredity of powder steels. The possibility of the synthesis of fullerene-containing phases during the liquidphase sintering of the iron–cast iron and iron–graphite compositions and their subsequent redistribution in the bulk of the material during dynamic hot pressing is worth noticing. Producing nitrogen-containing steels by mechanical activation of powders followed by sintering in dissociated ammonia is advisable to use for obtaining not only wear-and corrosion-resistant materials, but also heat-resistant ones. The studies on the decomposition of supercooled austenite in powder steels of various doping systems with different technological backgroung (sintered, hot-deformed, infiltrated, etc.) are promising. The potential for development is the research of hot-deformed concentration-inhomogeneous materials, obtained, in particular, on the basis of powders of the Distaloy type. The techniques developed by the Antsiferov’s school are significant. The most important one is the method for determining the concentration variation coefficient, as well as a magnetometric complex and a mathematical model, which makes it possible to predict the decomposition of supercooled austenite. Antsiferov’s works can be used for obtaining lean powder steels with the lower bainite structure, which provides the optimal combination of strength and toughness.
Phase transformations and properties of concentration-inhomogeneous magnetic materials based on the Fe–30%Cr–27%Co system
Authors: Kozvonin V. A. , Shatsov A. A. , Ryaposov I. V. , Generalova K. N. , Spivak L. V. 
Published: March 2019

The phase and structural transformations of a powder magnetically hard alloy of the system Fe–30%Cr–27%Co–1%Si–0,07%B with a metastable α1+α2 phase composition, a high content of cobalt, and a high level of magnetic properties were studied. The density and coefficient of variation of the concentration of the main elements of the sintered blanks at the level of deformable analogs are achieved by sintering in the α-phase with contact melting in the presence of a «vanishing» liquid phase formed due to the addition of silicon and boron ferroalloys. A kinetic approach to the development of a competitive hard magnetic alloy with a high proportion of the strongly magnetic phase is proposed. The effect of boron additions on the incubation period of the formation of an undesirable σ-phase and the temperature range of the concentration stratification of the α-solid solution on the strongly magnetic α1-phase and the weakly magnetic α2-phase were established. Optical microscopy, X-ray phase analysis and differential scanning calorimetry were used to determine temperature and time parameters of heat treatment of the alloy, including hardening, thermomagnetic treatment (TMT) and final aging, providing the required combination of Hc and Br by increasing the stability of the metastable α-phase up to 20 minutes in the interval temperatures of spinodal decomposition α → α1 + α2. The greatest increase in magnetic properties after TMT, observed at the 1st and 2nd steps of final aging, is related to the decomposition of the α-solid solution and the formation of subgrain boundaries. Elements of the obtained structure are characterized by submicron and nanometric sizes, which correlate with the research results on deformable alloys based on the Fe – Cr – Co system. The anisotropic α1+α2-structural state achieved by thermomagnetic treatment provided an increase in the magnetic properties of the studied 30H27KSR powder alloy to 30 % and the squareness coefficient of the magnetic hysteresis loop equal to 0,82 .
Формирование тонких пленок соединений Cu2SnS3 и Cu2SnSe3
Authors: Budanov Alexander V. , Vlasov Yury N. , Kotov Gennady I. , Rudnev Evgeniy V. , Podprugin Pavel I. 
Published: March 2019

Показана возможность синтеза соединений Cu2SnS3 и Cu2SnSe3 на стеклянных подложках путём отжига в парах халькогена тонкой металлической плёнки сплава Cu:Sn = 2:1 в вакуумной графитовой камере типа квазизамкнутого объёма. Методом рентгеновской дифракции установлено, что полученные плёнки халькогенидов имеют подобную сфалериту кристаллическую структуру. Для кубической модификации Cu2SnS3 и Cu2SnSe3 преимущественными плоскостями отражений являются (111), (220) и (311). Элементный состав плёнок соответствует стехиометрии соединений Cu2SnS3 и Cu2SnSe3. Методом ИК-спектроскопии определены энергии активации прямозонных переходов для Cu2SnS3 – 0.96 eV, а для Cu2SnSe3 – 0.70 eV.

ИСТОЧНИК ФИНАНСИРОВАНИЯ
Работа выполнена при финансовой поддержке гранта РФФИ № 18-32-00971 – мол_а.

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Межфазное распределение сорбиновой кислоты при экстракции сополимером N-винилформамида с 1-винил-3,5-диметилпиразолом
Authors: Mokshina Nadezhda Ya. , Pakhomova Oksana A. , Shatalov Gennadiy V. , Tarasov Dmitriy P. 
Published: March 2019

С целью изучения экстракции сорбиновой кислоты из объектов со сложной матрицей изучено межфазное распределение сорбиновой кислоты в системе сополимер N-винилформамид – 1-винил-3,5-диметилпиразол – хлорид аммония. Рассчитаны коэффициенты распределения и степень извлечения консерванта при различных соотношениях фаз и концентрации раствора сополимера. Установлено влияние рН на экстракцию сорбиновой кислоты, предложен механизм ее взаимодействия с экстрагентом. Определение сорбиновой кислоты в водно-солевой фазе осуществлено методом капиллярного электрофореза в выбранных условиях.

ЛИТЕРАТУРА

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Bykovskiy D. V., Kuznetsov V. A., Mokshina N. Ya., Poyarkova T. N., Shatalov G. V., Izvestiya Vysshikh Uchebnykh Zavedeniy Khimiya Khimicheskaya Tekhnologiya, 2014, vol. 57, no. 7, pp. 73-77. (in Russ.)
Mokshina N. Ya., Pakhomova O. A., Shatalov G. V., Kosinova I. I. Izvestiya Vysshikh Uchebnykh Zavedeniy Khimiya Khimicheskaya Tekhnologiya, 2019, vol. 62, no. 1. pp. 4-10. https://doi.org/10.6060/ivkkt.20196201.5763 (in Russ.)
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The Impact of the Intellectual Factor of the Kurdish man on the Identity of Architecture / Duhok as a case study
Authors: Farhan Rana , Ali Assist. Prof. Dr. Alan 
Published: March 2019

The fact that some Kurdish cities in Kurdistan of Iraq are floundering in the issue of architectural identity and the emergence of different opinions about the nature of Kurdish architecture, between those who support being part of Islamic architecture and others adopt modern architecture to support contemporary political orientation, with the emergence of other individual orientations. This is a motive for conducting this research and diagnosing the intellectual position of the man and the Kurdish society and monitoring the problems he suffers in the subject of identity in general, which reflects on the architectural output and the architectural identity.
The current research aims at diagnosing the intellectual position of man and the Kurdish society and its impact on the subject of identity in general and on architectural identity in particular. This research attempts to verify the following hypothesis: The architectural output is directly influenced by the intellectual position of man and the Kurdish society, It represents a reflection of the position of the society of identity, and that the identity of the architectural identity of crises is only a reflection of the crises in the identity of society.
The effect of Future Expansion on Architectural Form of University Buildings Sulaimani University - the Old Campus as a Case Study
Authors: Ali Assist. Prof. Dr. Alan , Salih Chro 
Published: March 2019

Future expansion is an extension of an existing building by adding new parts or connecting with buildings in order to create new expression and function for the building, expansion in general deals with future situation, building as it doesn’t need expansions, but within time factor it needs the expansion and the changes. The expansion in educational buildings is very important and needed for the changes of the learning process , that’s why , the design of the educational buildings should be very re-actionable with the changes , beside reserving the formal unity of the new and old buildings and the needs of the learning process .
This research ,study the relationship between Future Expansion on Architectural Form and the effect of Future Expansion on the architectural form of Kurdistan Region of Iraq university buildings, the problem of the research is lake of knowledge in studying the effects of expansion in the formal unity in university architecture, for that the study focused on two parts , the first is the theoretical side and the conceptual thoughts of the factors of the study , the second one is the practical study and the graphical analyzing of the case study(old campus of Sulaimani University), and discussing the outcomes ,and the conclusions of the study.
Unengaged head at term in primigravida: does it affect the chance of having a normal delivery?
Authors: Unnisa Sadiq , M. S. Poornima 
Published: March 2019

Background: In Obstetrics it is traditional concept that fetal head engagement occurs by 38 weeks in primigravida. Unengaged head in primigravida has been considered a possible sign of cephalo pelvic disproportion. It is associated with higher risk of cervical dystocia, which has led to increased rate of caesarean section with its financial implication and future restriction of family size. Labour is prolonged, the duration of both latent and active phase increases, due to improper fitting high fetal head.Methods: The prospective descriptive study was conducted at the Yenepoya Medical College hospital OBG Department. Study population included were 75 primi gravidas with unengaged head at term. Details of labour were noted down. Augmentation was done with oxytocin and dose of oxytocin was titrated . CTG was used to monitor fetal heart. Emergency LSCS was performed in patients with fetal distress or non-progress of labour. In case of vagina delivery, duration of 1st and 2nd stage, APGAR score at 1 and 5 minutes, and birth weights were recorded.Results: Of the 75 primigravida 66.66% were in the age group of 21-25yrs. Majority of the women were of 39-40 weeks (42.66%) of gestation. Common causes of unengaged head was deflexed head in 15 (20%) CPD in 11 (14.66%), loops of cord around neck in 8 (10.66%), polyhydramnios in 2(2.66%), placenta previa type-I and II : anterior in 5 (6.66%) 8 patients were with occipito posterior position. No cause could be identified in 27 cases (36%). Vaginal delivery occurred in 68% and LSCS in 32%.Conclusions: Unengaged head in primi gravida with spontaneous onset of labour is not an indication for LSCS. The attitude of watchful expectancy and timely intervention especially in those cases in which no significant etiological factor is found, the chances of vaginal birth increase there by reducing maternal land foetal morbidity.
Prevalence of gestational diabetes mellitus and its relationship with various risk factors in a tertiary care hospital in West Bengal with special reference to tribal population, India
Authors: Sharma Narenrda Kumar , Mahto Subodh Kumar , Sharma Rahul , Sheoran Ankita , Suman Sumit Kumar , Gupta Pulin Kumar , Sarkar Bishwanath Sharma , Dey Ramprasad 
Published: March 2019

Background: Gestational diabetes mellitus (GDM) is the most common medical complication and metabolic disorder of pregnancy. The aim and objective of this study was to determine the prevalence of GDM and its relationship with various risk factors with special reference to tribal population.Methods: The study was done in 200 patients between 24 and 28 weeks of gestation, attending antenatal outdoor in a tertiary care hospital of West Bengal. These patients were given 75gm oral glucose irrespective of the last meal and their plasma glucose was estimated at 2hours. Patients with plasma glucose values ≥140 mg/dl were labelled as GDM. Patients who were diabetic before pregnancy or whose pre pregnancy body mass index was not known or was in labour or had chronic disease, were not included in the study.Results: Prevalence of GDM was 11% in whole population while it was 14.63% and 10.06% in tribal and non-tribal population respectively. Prevalence of GDM and its correlation with most of risk factors in previous pregnancies was found to be significant in both non-tribal and tribal population. Family history of diabetes mellitus was the most prevalent risk factor in both non-tribal (9.4%) and tribal population (14.63%). There was no single most common risk factor among GDM patients found as there were multiple risk factors present with same frequency in both tribal and non-tribal population.Conclusions: The prevalence of GDM is 14.63% in the tribal population and 10.06% in non-tribal population which is not statically significant (P<0.407). The relation between the prevalence of GDM and risk factors was found to be significant for most of the risk factors.
Candida tropicalis: insight into the characteristics and outcome of adult patients admitted in medical and surgical intensive care units
Authors: Sandhu Raminder , Aggarwal Ramnika , Kumar Surinder , Budhani Diksha 
Published: March 2019

Background: Non albicans species are emerging increasingly as significant ICU pathogens. The increasing incidence of C. tropicalis infections is a significant problem because of its ability to develop rapid resistance to fluconazole.Methods: The study was designed to isolate, evaluate the risk factors and outcome of C. tropicalis infection from intensive care units. Identification was done by the biochemical methods. A total of 89 patients culture positive for C. tropicalis were selected for retrospective analysis over a period of one year. We collected various data about risk factors and outcome from the medical records.Results: A total of 89 patients culture positive for Candida tropicalis were analysed. Majority of these culture isolates were obtained from their blood (59.55%) followed by urine samples (31.46%). The indwelling devices (93.2%) remained a highest risk followed by prolonged administration of antibiotic therapy (92.1%) and admission in ICU for more than a week (88.8%). Overall mortality rate was 31.5%. Mortality was higher in patients with longer total length of stay in hospital (89.3%; p 1.000), indwelling devices (85.7%; p 0.5663) and in whom the antimicrobial therapy was administered for prolonged duration (82.1%; p 0.7581), although these factors remained statistically insignificant. 92.1% of isolates were sensitive to amphotericin B and showed 52.8%; 9.0% sensitivity to itraconazole and fluconazole respectively.Conclusions: C. tropicalis is now classified as the third or fourth NAC species being commonly isolated from clinical samples and associated with persistent systemic infections leading to a longer stay in the hospital. Several virulence factors seem to be responsible for high dissemination and mortality.
Imaging spectrum and prevalence of variant branching pattern of aortic arch
Authors: K. V. Vipin Krishnan , Narayan Varun , Ibrahim Niyaz , Mathew John , James Sheen Maria 
Published: March 2019

Background: Variant branching patterns of the aortic arch are not infrequent but are commonly under reported. This study was conducted to determine the spectrum of Variant branching pattern of aortic arch and their prevalence using contrast enhanced computed tomography (CECT) images of the cases from a tertiary care centre.Methods: Contrast enhanced computed tomography (CECT) images of aortic arch region from 1116(629 male and 487 female) cases from 18 to 85 years of age were examined retrospectively. The images were reviewed for normal and variant anatomy of aortic arch and the results were analyzed statistically.Results: Of 1116 patients, 878 (78.6%) cases showed normal and 238 (21.3%) cases had variant branching pattern of the aortic arch. The most common variation was the common origin of brachiocephalic trunk (BCT) and the left common carotid artery (LCCA) which was observed in 160 (14.3%) cases. In 8 (0.7%) cases, BCT and LCCA took origin from a single common trunk arising from the aortic arch. In 60(5.4%) cases, the left vertebral artery (LVA) originated directly from the aortic arch between the origin of the LCCA and left subclavian artery (SCA). 8 (0.7%) cases had aberrant right subclavian artery. Two (0.2%) cases showed right aortic arch.Conclusions: Interventional radiologists and surgeons should be well aware of variant anatomy of aortic arch. Contrast CT is a highly reliable imaging method for demonstrating anatomical features and variations of the arch.
Analytical and morphometric study of nutrient foramina of femur and its clinical implications
Authors: Dervisevic Lejla , Dervisevic Amela , Ajanovic Zurifa , Hasanbegovic Ilvana 
Published: March 2019

Background: The femur is supplied princially by the diaphyseal nutrient artery which enters the bone throught the nutrient foramen. This supply is essential during the growing period, the early phases of ossification, and in different surgical procedures. The aim of present study was to examine the morphology and topography of the femur nutrient foramen to provide detalied data on such features.Methods: This was a cross-sectional-descriptive study in which we observed 50 femurs. We analysed the number and location of nutrient foramina, the length of the bone, the position of the nutrient foramen regarding to values of FI, correlation between number of nutrient foramen and length of femur, correlation between position of nutrient foramen and side of extremity to which femur belongs.Results: The double foramina were common in right (57.1%) and left (42.1%) femur, mostly located in medial lip of aspera line in right (64.3%) and on the lateral lip in left femur (68.4%), with statistically significant correlation, χ = 4.85; p = 0.03, p <0.05. The foramina in left (89.5%) and right (96.4%) femur were commonly observed at their middle third, with no statistically significant correlation between position of foramen accordingly to Foraminal Index value and side of extremity on which femur belongs (p=0.56; p>0.05). There is positive correlation between length of right and left femur and number of foramina.Conclusions: The study provides data of the nutrient foramina on femur, which is helpful for clinicians to help preserve bone vascularization during surgery.
CYP3A drug metabolism in the developmental age: recent advances
Authors: Nowak Jan Krzysztof , Bancerz Bartłomiej , Bartkowska-Śniatkowska Alicja 
Published: March 2019

Background. The 3A subfamily of cytochrome P450 (CYP3A) accomplishes phase I metabolism for approximately half of the available medications. We aimed to review the recent advances in our understanding of CYP3A activity, which could apply to infants and toddlers.Material and Methods. A literature review.Results. The reviewed recent data cover: CYP3A7 expression and functions, changes of CYP3A4 function in the first two years of life, CYP3A intestinal metabolism and zonation, CYP3A metabolic programming, pediatric CYP3A pharmacogenetics, the impact of critical illness on CYP3A, phenotyping, and other clinical implications of a better comprehension of CYP3A biology.Conclusions. Although the knowledge of CYP3A enzymes has already changed pediatric practice, much more is to be expected in the upcoming years. The areas to watch include: endogenous markers for phenotyping, new CYP3A7 substrates and products, pharmacogenetic interactions with transporter genes for non‑immunomodulatory drugs, as well as interactions with microbiota and specific bioactive foodstuffs.