bluuebunny/crossref_metadata_2025_split huggingface dataset:
Simulation study of reactive distillation process for synthesis of dimethyl maleate
Authors: Wahab Abdul , Xu Yanhong , Zhao Jigang 
Published: December 2023

Abstract
Conventional dimethyl maleate (DMM) synthesis relies on the use of sulfuric acid as a catalyst which requires water washing and produces a large amount of wastewater that harms the environment. The use of this method is expensive since it involves numerous processes such as neutralization of sulfuric acid, washing with water, distillation etc. and the yield of dimethyl maleate is not very high. Reactive distillation integrates the two important industrial processes such as reaction and distillation into a single unit which shortens the overall process, reduces capital and operating costs, and maintains the reaction in a forward direction to enhance the conversion of maleic anhydride by continuously removing of the products. In this work, simulation study based on experimental investigation of reactive distillation process for the synthesis of dimethyl maleate was carried out using Aspen Plus V11. DZH strong cation exchange resin was used as catalyst for esterification reaction of maleic anhydride with methanol. A reactive section of column was packed with Katapak SP type packing loaded with DZH catalyst while non-reactive sections consist of wire gauze packing. In order to describe a reactive distillation process for synthesis of dimethyl maleate, RAD-FRAC equilibrium stage model was employed. The NRTL activity model and RK equation of state model were selected to describe vapor-liquid equilibrium of the system. The reliability of the developed simulated model was verified by validating the simulation results with the experimental ones. The effect of various design and operating parameters on the conversion of maleic anhydride and purity of dimethyl maleate has been studied. It was found that the optimal condition for RD, were as follow: total number of theoretical stages 17, rectifying stages 3, reactive stages 7, stripping stages 5, reflux ratio 0.25, operating pressure 0.1 MPa, reboiler duty 250 Cal/Sec, feed mole ratio 1:5. Under optimized condition the water formed as a results of esterification reaction was constantly removed from the reactive section of the column to maintain reaction balance, the conversion of maleic anhydride was 99.95 %, purity of dimethyl maleate achieved was 0.997 and the reactive distillation process was feasible to produce dimethyl maleate without any wastewater.
Incorporation of oyster mushroom powder and pearl millet flour improves the nutritional quality and glycemic response of Indian flatbread
Authors: Dhillon Gurpreet Kaur , Mahajan Monika , Kour Amardeep , Kaur Kamaljit 
Published: December 2023

Abstract
The purpose of present study is to develop a nutritionally enriched and low GI (glycemic index) Indian flatbread using nutritionally balanced crops. To achieve this goal, whole wheat flour was supplemented with different levels of oyster mushroom powder (OMP) – 5 %, 10 %, 15 %, and 20 %, along with pearl millet flour (PMF) – 10 %, 20 %, 30 %, and 40 %, resulting in a range of formulations for the study. The prepared formulations were evaluated for their chemical, physical, pasting, texture, predicted GI, resistant starch and sensory properties along with color analysis. The protein and fiber content in formulated flatbread increased with increase in percentage of OMP and PMF from 5–20 % and 10–40 % respectively. The pasting properties showed a significant (p < 0.05) reduction in peak, breakdown, trough, final and setback viscosities of composite flour. However, no significant effect on dough handling was observed due to change in pasting behaviour. Furthermore, in vitro protein digestion studies (IVPD%) indicated improved protein quality in formulated flatbread. The whole wheat flour supplementation has also reduced starch hydrolysis rate by decreasing composite flatbread’s predicted glycemic response (pGI) from 82 in control wheat bread to 61–50 in formulated flatbread. Colour attributes of enriched flatbread showed a darker colour than control, however, it was preferred by the panellists at OMP (15 %) and PMF (30 %) substitution by obtaining an overall acceptability score of 7.3 out of 9.0. Practical application: The present study will be very helpful for a diabetic patient to take the best composition of flatbread in their diet to effectively manage their rise in blood glucose level.
On the domain of convergence of general Dirichlet series with complex exponents
Authors: Kuryliak M.R. , Skaskiv O.B. 
Published: December 2023

Let $(\lambda_n)$ be a sequence of the pairwise distinct complex numbers. For a formal Dirichlet series $F(z)=\sum\limits_{n=0}^{+\infty} a_ne^{z\lambda_n}$, $z\in\mathbb{C}$, we denote $G_{\mu}(F),$ $G_{c}(F),$ $G_{a}(F)$ the domains of the existence, of the convergence and of the absolute convergence of maximal term $\mu(z,F)=\max\big\{|a_n|e^{\Re(z\lambda_n)} : n\geq 0\big\}$, respectively. It is well known that $G_\mu(F), G_a(F)$ are convex domains.
Let us denote $\mathcal{N}_1(z):=\{n : \Re(z\lambda_n)>0\}$, $\mathcal{N}_2(z):=\{n : \Re(z\lambda_n)<0\}$ and \[\alpha^{(1)}(\theta) :=\varliminf\limits_{\genfrac{}{}{0pt}{2}{n\to +\infty}{n\in\mathcal{N}_1(e^{i\theta})}}\frac{-\ln|a_n|}{\Re(e^{i\theta}\lambda_n)},\qquad \alpha^{(2)}(\theta) :=\varlimsup\limits_{\genfrac{}{}{0pt}{2}{n\to +\infty}{n\in\mathcal{N}_2(e^{i\theta})}}\frac{-\ln|a_n|}{\Re(e^{i\theta}\lambda_n)}.\] Assume that $a_n\to 0$ as $n\to +\infty$. In the article, we prove the following statements.
$1)$ If $\alpha^{(2)}(\theta)<\alpha^{(1)}(\theta)$ for some $\theta\in [0,\pi)$ then \[\big\{te^{i\theta} : t\in (\alpha^{(2)}(\theta),\alpha^{(1)}(\theta))\big\}\subset G_\mu(F)\] as well as \[\big\{te^{i\theta} : t\in (-\infty,\alpha^{(2)}(\theta))\cup (\alpha^{(1)}(\theta),+\infty)\big\}\cap G_\mu(F)=\emptyset.\]
$2)$ $G_\mu(F)=\bigcup\limits_{\theta\in [0,\pi)}\{z=te^{i\theta} : t\in (\alpha^{(2)}(\theta),\alpha^{(1)}(\theta))\}.$
$3)$ If $h:=\varliminf\limits_{n\to +\infty}\frac{-\ln |a_n|}{\ln n}\in (1,+\infty)$, then \[\Big(\frac{h}{h-1}\cdot G_a(F)\Big)\supset G_\mu(F)\supset G_c(F).\] If $h=+\infty$ then $G_a(F)=G_c(F)=G_\mu(F)$, therefore $G_c(F)$ is also a convex domain.
Modelling the release of Mo, Tc, Ru and Rh from high burnup spent nuclear fuel at alkaline and hyperalkaline pH
Authors: Giménez Javier , De Pablo Joan , García-Gómez S. , Serrano-Purroy Daniel , Iglesias Luis , Clarens Frederic , Martínez-Torrents Albert 
Published: December 2023

AbstractThe present work shows experimental data on the release of some radionuclides that are forming the so-called ε particles in the spent nuclear fuel (SNF): Mo, Tc, Ru and Rh. The leaching experiments were carried out with a 60 GWd·t−1 burnup SNF at two different pH values, 8.4 and 13.2, and under oxidizing conditions. The modelling of the data showed that the higher release of Mo, Tc, Ru and Rh at pH 13.2 could be due to the higher dissolution rate of the ε-particles.
Graphical abstract
SO[M]BRAS, PÉROLAS E PORCOS
Authors: Lima André Luiz de Araújo , Silva Ana Lúcia Gomes da , Gomes Antenor Rita 
Published: December 2023

Este artigo é resultado da pesquisa de mestrado intitulada O fotográfico e a professoralidade: uma cartografia de aproximações e distanciamentos. Nele rastrea-se processos de criação na perspectiva de uma esquizoanálise de memórias, tensionando, entretanto, sem negar frontalmente a ideia de santidade impressa na laicidade da escola, num modo de estetização do espaço escolar e, alhures, produzir linhas de fuga singularizantes a partir do fotográfico, cartografando algumas passagens dessa trilha, embate entre santidade, pérolas e porcos em meio ao lamaçal sombrio e fecundo do processo de vir a ser professor, para alcançar um certo modo de ser metaestável. Adota como método a cartografia e toma a esquizoanálise como inspiração processual da análise. Aponta como resultados centrais emergentes: percurso cartográfico desse jogo de sombras permite experimentar ser encharcado pelos acasos, pelas pequenas formas dos acontecimento microfísicos, na educação básica como docente de arte, pela luz que chega, pelo peso do ferro que morre, pela leveza do ar, tudo isso retorna como uma energia potencial pelo fotográfico, que rearranja esses vetores de força e produz uma existência outra, uma existência artística, encarnada por inteiro no presente.
Reoperations after Ross procedure: a retrospective study
Authors: Chernov I. I. , Enginoev S. T. , Zenkov A. A. , Abdulmejidova U. K. , Guliyev M. A. 
Published: December 2023

Aim. To analyze the immediate outcomes of reinterventions after Ross procedure.Material and methods. From April 2009 to December 2022, 224 Ross operations in adults were performed at the Federal Center for Cardiovascular Surgery. The retrospective study included 17 patients who required repeated interventions (14 men/3 women). The mean age of the patients was 38±11 years, with a minimum age of 21 and a maximum of 54 years. A history of infective endocarditis was revealed in 4 (23,5%) patients, hypertension — in 3 (17,6%) patients. Of the 17 included patients, 15 patients underwent the classic Ross operation ("full root replacement"), while 2 — a modified technique (1 — wrapping with aorta, 1 — wrapping with a Dacron graft). Annulus enhancement was previously performed in 3 patients.Results. Interventions on the pulmonary autograft and homograft were performed in 16 and 4 cases, respectively. The main indication for pulmonary autograft intervention was aortic regurgitation in 15 cases, and neoaortic aneurysm in 14 cases. In 3 patients, there was pulmonary homograft stenosis, while in 1 case — thrombosis. Two patients required interventions on other valves: 1 — mitral valve stenosis, 1 — severe tricuspid regurgitation. Mean reoperation, cardiopulmonary bypass and myocardial ischemia time were 289±62, 126±35 and 98±22 min, respectively. Combined interventions were performed in 6 cases. David valve-sparing procedure was performed in 9 patients, Bentall-de Bono technique — in 3, aortic valve repair — in 2, mechanical aortic valve replacement — in 2, supracoronary ascending aorta replacement — in 2, pulmonary homograft replacement — in 2, pulmonary homograft thrombectomy — in 1, pulmonary homograft repair — in 1 patient, mitral valve replacement — in 1 patient, tricuspid valve repair — in 1 patient. One patient required resternotomy for bleeding. There were no postoperative complications (perioperative myocardial infarction, acute kidney injury, stroke, sternal infection, cardiac tamponade) and deaths. The median length of stay in intensive care unit was 21 [16-23] hours.Conclusion. Reoperations after the Ross procedure may be required for different pathologies, but all can be performed surgically with a high safety in experienced operator.
Hypertension, cardiovascular risk and exercise in middle-aged and elderly people: a narrative review
Authors: Vyalova M. O. , Shvarts Yu. G. 
Published: December 2023

Hypertension (HTN) is widespread among middle-aged and elderly people, including those doing sports. For the first time in 2020, the European Society of Cardiology guidelines on sports cardiology and exercise in patients with cardiovascular disease included adult and elderly patients in a separate group. However, this is a heterogeneous category of patients, including everyone over 35 years of age. Therefore, admittance of athletes to training and competitions still remains at the discretion of physician.Aim. To assess the relationship and mutual influence of hypertension, other cardiovascular risk factors and sports in middle-aged and elderly people.Material and methods. Our narrative review is based on 50 articles published on Pubmed, Scopus, Web of Science and eLIBRARY.ru, selected using the keywords "veteran athletes", "arterial hypertension", "cardiovascular risk", "physical activity". Related papers over the past 5 years were evaluated.Results. Currently, there is a trend toward an increase in the number of veteran athletes whose problems are not reflected in guidelines on sports and exercise.Conclusion. In the future, large randomized studies are needed to assess the response of blood pressure (BP) to intense exercise, as well as to determine the normal BP response and clear strategy to manage this category of people, depending on the presence of hypertension.
Compliance of the management of hospitalized patients with heart failure with the quality criteria for health care: data from the St. Petersburg registry
Authors: Endubaeva G. V. , Solovyova A. E. , Medvedev A. E. , Kurbanova M. M. , Kogan E. I. , Gorbacheva T. V. , Yazenok A. V. , Zvartau N. E. , Villevalde S. V. 
Published: December 2023

Aim. To assess the compliance of the management of patients with heart failure (HF) with quality criteria (QC) for health care, including discharge instructions for patients.Material and methods. Hospitalizations of patients aged over 18 years with HF (ICD 10 code — I50.x) during the period from January 1, 2019 to October 1, 2020 were randomly selected from the "Chronic Heart Failure" registry of St. Petersburg. Discharge and post-mortem summaries were assessed for compliance with the quality criteria listed in the 2020 Russian Chronic Heart Failure guidelines.Results. The study included 553 patients (women, 71,1%, mean age, 82,0±9 years, comorbidities: hypertension — 99,1%, coronary artery disease — 97,6%, chronic kidney disease — 53,2%, diabetes — 32,6%). Electrocardiography (QC № 1) was performed in 94,2% of patients, chest radiography (QC № 2) 91,7%, echocardiography (QC № 3) — 81,0%, but the results were not always informative. The exact ejection fraction (EF) value was reported in 55,4% of patients. Laboratory examination corresponded to QC № 4-6 in 20,3% of cases and was performed in 53,3-94,9%. Natriuretic peptides (NPs) were not determined (QC № 7-0%).The completeness of intravenous therapy (QC № 8) was not assessed due to insufficient physical examination data.Oral therapy (QC № 9) was prescribed frequently as follows: renin-angiotensinaldosterone system inhibitors (RAASo) — 93,3%, beta blockers (BBs) — 85,4%, mineralocorticoid receptor antagonists (MRAs) — 78,7%. However, triple RAAS+BB+MRA therapy was carried out in 54,1% of HF cases with EF <50% and no contraindications.Diet was recommended in 87,1% of summaries, water-salt regimen — 53,3%, drug titration — 8,2%. The date of visit to outpatient cardiologist was indicated in 10,0%.Conclusion. With the exception of NP assessment, the scope of paraclinical studies corresponded to the QC in the majority of patients. Optimal therapy was prescribed to 54,1% of patients with EF <50%. An early outpatient visit after discharge was indicated in 10,0% of summaries.
Rehabilitation of COVID-19 convalescents and its impact on cardiovascular endpoints: propensity score matching analysis
Authors: Lasynova G. Kh. , Lakman I. A. , Gareeva D. F. , Agapitov A. A. , Sadikova L. F. , Sakhautdinov А. R. , Pavlov V. N. , Zagidullin N. Sh. 
Published: December 2023

Due to the large number of complications and decreased quality of life after coronavirus disease (COVID-19), physical and psychological rehabilitation of patients is relevant. However, the effectiveness of rehabilitation on endpoints has not yet been demonstrated.Aim. To determine the effectiveness of different rehabilitation options in hospitalized patients with COVID-19 on the development of long-term adverse cardiovascular events 1 year after discharge.Material and methods. In a single-center, non-randomized observational study, 3 groups of patients were formed after hospitalization with COVID-19: I — with telemedicine rehabilitation (n=118), II — with rehabilitation in a specialized department (n=46) and III — without rehabilitation (n=175). After 1-year followup, groups were compared regarding following endpoints: cardiovascular mortality, myocardial infarction, stroke, pulmonary embolism, atrial fibrillation and cardiovascular hospitalization. Propensity score matching analysis was used to optimize differences between comparison groups.Results. Rehabilitation after hospitalization of patients with COVID-19, both in the hospital and remotely for 1 year, helps to reduce cardiovascular hospitalization rate. In addition, remote rehabilitation reduces cardiovascular mortality.Conclusion. Both rehabilitation options reduce the incidence of cardiovascular hospitalization compared to no rehabilitation.
Application of methods investigation of materials and structures of electronics in development of medical titanium endoprostheses with increased fibrointegration efficiency
Authors: Shaikhaliev A. I. , Polisan A. A. , Ivanov S. Yu. , Kiselev D. A. , Parkhomenko Yu. N. , Malinkovich M. D. , Cherkesov I. V. , Temirov A. A. , Molchanov S. A. 
Published: December 2023

Titanium alloys approved for clinical use in our country are widely used in traumatology, maxillofacial surgery and stomatology, mainly for the manufacture of various endoprostheses and dental implants, i.e. structures, introduced and installed in the bone and soft tissues of human body, able to both bio-integrate and bio-adaptable in the tissues of human body. In the field of medical materials science and in particular in the development of medical products based on titanium and its alloys and various coatings on the surface of such products, modern methods and modern equipment developed for the electronics industry are successfully used.In this paper, the methods of research of materials and structures of electronics used in the field of medical technology and specifically in the development of medical titanium endoprostheses have made it possible to develop the basics of the technology for obtaining optimal microrelief on the surface of titanium endoprostheses intended for engraftment in soft tissues (i.e. fibrointegrable) with bioactive coating of titanium dioxide TiO2 with an anatase structure obtained by atomic-layer deposition. The research aimed at revealing the optimal surface treatment of such endoprostheses in order to achieve improved fibrointegration properties in their use in maxillofacial surgery has been carried out.It has been shown that high adhesion and fibrointegration between the titanium endoprosthesis and connective tissue are achieved with an average surface roughness (4—8)⋅102 nm, root-mean-square roughness 5⋅102—1⋅103 nm, profile height (3—6)⋅103 nm, and thickness bioactive coating in the order of 10 nm.
Multiscale modeling of clusters of point defects in semiconductor structures
Authors: Abgarian K. K. , Mutigullin I. V. , Uvarov S. I. , Uvarova O. V. 
Published: December 2023

Clusters of point and extended defects, arising in semiconductors as a result of radiation exposure, allow structures to acquire various properties that can be used in the manufacture of new generation devices for nanoelectronics. Numerical simulation of semiconductor materials used to research such processes is a resource-intensive and multifaceted task. To solve it, the multiscale modeling complex was created and the multiscale composition containing instances of basic composition models was set. An algorithm was developed that allows speeding up calculations for systems of large dimensions and accounting for a large number of interacting atoms. The structure of silicon with a complex of point defects was considered as a model. Molecular dynamics simulation was performed using the multiparameter potential of Tersoff. For the calculations, an effective approach to the implementation of parallel computing was presented, and software for parallelizing the computations was used, placed on the hybrid high-performance computing complex of the FRC «Computer Science and Control» of Russian Academy of Science. To implement the parallelized algorithm, the OpenMP standard was used. This approach has significantly reduced the computational complexity of the calculations.It was shown that the developed high-performance software can significantly accelerate molecular dynamics calculations, such as the calculation of divacancy communication energy, due to the parallelization algorithm.
An Assessment of Maximal Isometric Hand Grip Strength and Upper Body Explosive Strength and Endurance in Various Ball Sports
Authors: Rahman Md Hamidur , Sharma J. P. 
Published: December 2023

Background. Playing with the ball and using hand-arm strength and power are very crucial for ball game players. It takes arm force and endurance, as well as isometric hand grip strength, to accomplish ball-game skills.
Study purpose. The aim of the study was to evaluate maximal isometric hand grip strength, arm and shoulder explosive strength, and endurance in basketball, handball, and volleyball athletes.
Materials and methods. The study randomly selected 135 male athletes, including 45 basketball, 45 handball, and 45 volleyball players, aged 17 to 24, all competing at the inter-university level. Hand grip strength (HGS) for both dominant (DHGS) and non-dominant (NDHGS) hands was measured using a JAMAR hydraulic hand grip dynamometer. An over-the-head seated medicine ball throw (SMBT) test assessed explosive arm strength, while a push-up (PU) test evaluated muscular strength and endurance.
Results. The F-values (F) (2, 132) of DHGS, NDHGS, SMBT, and PU tests among basketball, handball, and volleyball players were .499 (p = .608); 1.166 (p = .315); 5.595 (p = .005); and 10.339 (p = .000), respectively. The results indicated that no notable distinctions were observed in DHGS and NDHGS among athletes in the three sports. However, considerable differences were found in the SMBT and PU tests.
Conclusions. The study concluded that basketball, handball, and volleyball players’ maximum isometric hand grip strength was nearly the same, but in both cases, the handball player's mean value was superior to others. Upper-body explosive power, muscular strength, and endurance showed distinct differences from one group to another.
Antalya-Elmalı Bölgesinde, Defineci Okültizmi ve Spiritüelleşme Üzerine Sosyolojik Bir Analiz
Authors: ÖZARSLAN Osman 
Published: December 2023

Arkeoloji, Fransız devriminden sonra ortaya çıkmış bir bilgi biçimi olarak, antik dünyayı en temelde, mimari kalıntılar, ikonografi, nümizmatik, semiyografi, paleografi ve sosyal-fiziksel antropoloji aracılığıyla anlamaya ve anlamlandırmaya çalışır. Defineciler ise arkeolojik kalıntılarla, Süleyman’ın hazinesi ve Belkıs kıssasındakine benzer arketipik hikayeler, kalıntılardaki iz-işaretleri hazinenin kriptosu olarak gören ve bu kriptoyu çözebilecek okült bilginin Türk-İslam formu olan kenz-ül havas ‘ilmi’ne hakim cinci-muskacı-tılsımcı taifesi ve eşkıya söylenceleri aracılığı ile ilişkilenir . Arkeoloji biliminin bilgi üretme biçimi ile definecilerin bilgi üretme biçimi arasındaki gerilim, bu çalışmanın sahasının yapıldığı Elmalı bölgesinde de gözlemlenir. Bu iki bilgi biçimi arasındaki gerilim, özellikle definecilik ve definecilik etrafında dönen okült faaliyetlerle uğraşanların dünyayı anlamlandırma biçimi bizi çalışmanın temel problematiği olan bu senkretik katmanlar nasıl inşa edilir sorusuna götürür. İnşa edilmiş bu katmanların hangi amaçlara hizmet ettiği, işlevlerinin neler olduğu, nasıl işlediği diğer problematikler.
Bu çalışmada, tarihsel ve sosyal bir takım süreçlerin sonucunda inşa edilen senkretik katmanların aslında bir tür defineci okültizmi olduğu, bu okültizmin yalnızca tarihsel, dini ve yerel folklorik kaynaklar aracılığı ile değil, sosyal medya aracılığıyla daha katmanlı bir şekilde inşa edildiği anlatılmaya çalışılıyor. Ayrıca, bu okült bilginin definecilik faaliyetleri içerisinde çok merkezi gibi görünse de aslında, bir tür tamamlayıcı bilgi olduğu ve define bulmaktan ziyade, definecilik faaliyetlerinin sürdürülebilir kılmaya yarayan bir moral kod olduğu anlatılmaya çalışılıyor. Elmalı bölgesindeki okültizmin yerel folklorik, tarihsel kaynakları olduğu kadar sosyal medya üzerinden genel ve daha yoğun bir dolaşımı da var. Bu makalenin ele aldığı konulardan birisi de, sosyal medya üzerinden yapılan bu yayınların, okült bilgiyi daha ezoterik hale getirdiği ve bu ezoterikleşmenin aslında define piyasasında dolaşımda olan hem maddi değeri hem de epistemoloji katmanını kontrol altında tutmaya dönük olduğu olacak.