bluuebunny/crossref_metadata_2025_split huggingface dataset:
Разработка полиакриламидных композиций, наполненных клиноптилолитовыми породами для адсорбционной очистки воды от нефтепродуктов
Authors: Dabizha Olga N. 
Published: April 2019

Синтезированы композиционные материалы с улучшенными нефтесорбционными свойствами на основе наполненного клиноптилолитовыми породами полиакриламида. Полученные композиты изучены методами оптической микроскопии, инфракрасной спектроскопии, дифференциальной сканирующей калориметрии и термогравиметрии. Рассмотрены вероятные варианты взаимодействий между активными центрами наполненной полимерной системы с участием молекул воды. Определены оптимальные содержания дисперсного наполнителя и концентрация водного раствора полиакриламида для получения материала с максимальной экспертной оценкой и степенью очистки морской воды от нефти и дизельного топлива.
Определение параметров ионитных комплексов, образующихся при сорбции катионов никеля слабоосновным анионитом АМ-7
Authors: Kolodyazhnyi Vladimir A. , Chelnakova Polina N. , Muracheva Elena S. 
Published: April 2019

Исследована сорбция катионов никеля комплексообразующим анионитом АМ-7. Показано, что сорбция ионов никеля из водных растворов удовлетворительно описывается уравнением Ленгмюра, линейная аппроксимация которого позволяет определить максимальную сорбционную емкость комплексообразующего анионита. Для определения характеристик ионитного комплексаконстанты устойчивости и координационного числа – рассмотрены два независимых метода: определение константы устойчивости по коэффициенту распределения и методом разрушения аммиачных комплексов никеля при контакте с депротонированной формой ионита. Рассчитанные константы устойчивости ионитных комплексов и значение координационного числа в обоих случаях находятся в удовлетворительном согласовании.
Сорбционные характеристики сорбентов для твердофазной экстракции фенольных соединений из экстрактов лекарственных растений
Authors: Shil’ko Elena A. , Temerdashev Zaual A. , Milevskaya Victoria V. , Kiseleva Natalia V. 
Published: April 2019

В основе исследований настоящей работы находится твердофазное извлечение фенольных компонентов экстрактов лекарственного растительного сырья различными типами сорбционных материалов. В качестве сорбционных материалов использовали октадецилсиликагель (Strata C18-E), сополимер стирола и дивинилбензола, химически модифицированный N-винилпирролидоном,(Strata X), а также сополимер дивинилбензола и N-винилпирролидона (Oasis HLB). Для каждого из сорбентов получены сорбционные характеристики по отношению к целевым соединениям (объем до проскока, равновесный объем, объем удерживания и др.), а также десорбционные параметры (коэффициент концентрирования и степень извлечения). Показано, что сорбенты на основе октадецилсили-кагеля достаточно эффективны для извлечения группы флавоноидов и их гликозидов, а полимерные материалы - одновременно и флавоноидов, и фенольных кислот. Степени извлечения фенольных кислот и флавоноидов при коэффициенте концентрирования 5 на сорбенте Strata C18-E составили 27-40% и 79-105% соответственно. С применением сорбента Strata X также достигается концентрирова-ние в 5 раз при степенях извлечения 106-107% (для фенольных кислот) и 99-122% (для флавоноидов). На сорбенте Oasis HLB возможно концентрирование в 20 раз фенольных кислот при их степенях извлечения 74-96% и в 32 раза для флавоноидов при степенях извлечения в диапазоне 56-91%.
Равновесная сорбция метиленового голубого на клиноптилолите
Authors: Kotova Diana L. , Sokrukina Anna I. , Krysanova Tatiana A. 
Published: April 2019

Изучена равновесная сорбция метиленового голубого на нативном и кислотно-активированном клиноптилолите. Выявлен характер сорбции красителя на алюмосиликате, проявляющийся в образовании монослоя и формировании ассоциатов метиленового голубого. Сорбция из разбавленных растворов красителя описывается уравнением Лэнгмюра. Установлено увеличение удельной поверхности сорбента и его сорбционной способности с ростом концентрации активатора.
Оптимизация методов ВЭЖХ контроля антоцианового состава вин и виноматериалов
Authors: Drob’ Alexander A. , Vasiyarov Georgy G. , Titova Elena V. , Staroverov Sergei M. , Yakuba Yuri T. , Guguchkina Tatyana I. 
Published: April 2019

Предложено совместное использование ВЭЖХ-систем с муравьиной и с трифторуксусной кислотами для получения исчерпывающей информации об антоциановом составе вин и виноматериалов. Впервые предложено использование гидрофильной хроматографии (HILIC) для анализа красных вин и виноматериалов. Показаны преимущества использования режима HILIC для предварительной количественной оценки содержания Mvd-3,5-diGlu в винах и виноматериалах. Проведен качественный анализ 13 образцов вин из винограда сорта Каберне-Совиньон. На основе полученных данных сделан вывод о возможности определения сортовой принадлежности вин и виноматериалов с помощью ВЭЖХ-анализа.
Сопряженный перенос ионов и теплоты через катионообменную мембрану при электродиализе малорастворимых электролитов
Authors: Shaposhnik Vladimir A. 
Published: April 2019

Проблема влияния температуры на транспорт ионов через ионообменные мембраны обсуждена на основе термодинамики стационарных необратимых процессов. Линейный закон Онзагера позволяет изучить влияние потока тепла на перенос ионов через ионообменные мембраны, если известны феноменологические коэффициенты проводимости. Эксперименты были проведены в электродиализаторе с чередующимися катионообменными и анионообменными мембранами при задании постоянного перепада температуры между секциями. Объектом исследования была суспензия малорастворимого электролита сульфата стронция. Пропускание постоянного электрического тока приводило к непрерывному растворению суспензии, что было существенно не только для сравнения теории с экспериментом, но и для моделирования процессов растворения осадков при реверсивном электродиализе.
Получение и исследование пористой структуры минерально-углеродных адсорбентов на основе силикагеля и полимерных отходов
Authors: Nistratov Alexey V. , Skaryukin Alexey S. , Klushin Vitaly N. 
Published: April 2019

Описан способ получения и охарактеризована пористая структура минерально-углеродных адсорбентов на основе двух видов силикагеля и отходов полиэтилена, полипропилена и полиуретана. Представлены изотермы низкотемпературной адсорбции ими азота, по которым рассчитаны размеры, удельный объём и поверхность микро- и мезопор. Показано, что при пиролизе указанных полимеров мезопористая структура адсорбентов меняется незначительно, а микропористая структура сохраняется только с крупнопористым силикагелем, являющимся более подходящей минеральной основой.
Intermolecular interactions between polyarylenephthalides surface and organic compounds of different nature by inverse gas chromatography data
Authors: Gus’kov Vladimir Yu. , Shaihitdinova Yulia F. , Zilberg Rufina A. , Kraikin Vladimir A. , Maistrenko Valery N. 
Published: April 2019

Polyarylenephthalides are a promising class of polymeric materials. They are soluble in organic solvents, but remain resistant to water, as well as to acids and bases. All this makes polyarylenphthalide promising materials for the formation of films on surfaces. However, for this it is necessary to first study the ability of polyarylenephthalides to different intermolecular interactions, as well as the polarity of their surface.Therefore, it is of interest to use the inverse gas chromatography method for studying the adsorption properties of the surface of polyarylenephthalates, as well as the evaluation of its conditional polarity. Two polymers of the class of polyarylenephthalides were used as the studied samples: chlorinated (in position 4) poly phthalidylidenefluorene) (OPS-236) and poly (phthalidylidene diphenyl) (PE-259). They are distinguished by the presence of a methylene group between two benzene rings. Inert solid support Chromaton NAW was used as a solid substrate for the deposition of polyarylenphthalide films. The application was carried out from chloroform by evaporation of the solvent at a temperature of 40 ° C. The amount of the applied polymer was 1% by weight of the inert carrier. The study was conducted by the method of inverse gas chromatography. Samples were introduced as diluted vapor-air mixtures at the limit of the detector sensitivity. This made it possible to measure the retention parameters in the Henry region and consider the interactions between sorbate molecules to be negligible. The relative conditional polarity of the surface and the contributions of various intermolecular interactionsto adsorption free energy were estimated by the method of linear free energy relationship (LFER). From the obtained LFER-coefficients, the contributions of intermolecular interactions to the adsorption energy were calculated, and the relative conditional polarity of the surface was also estimated. The dispersion and specific component of the Helmholtz free energy of adsorption was calculated by the Dong method. It has been established that adsorbents based on polyarylenephthalides are able to act as stationary phases for chromatography. It is shown that polyarylenephthalide films are capable of both dispersion and various specific interactions with organic molecules. The surface of polyarylenephthalides can be attributed to stationary phases of medium polarity, more polar than porous polymers based on styrene and divinylbenzene and less polar than silica gels.
Strategies to Reduce the Door-to-Device time in ST-Elevation Myocardial Infarction Patients
Authors: Salarifar Mojtaba , Askari Javad , Saadat Mohammad , Geraiely Babak , Omid Negar , Poorhosseini Hamidreza , Amirzadegan Alireza , Hajzeinali Alimohammad , Alidoosti Mohammad , Aghajani Hassan , Nozari Younes , Nematipoor Ebrahim 
Published: April 2019

Background: Performing primary percutaneous coronary intervention (PPCI) in a timely fashion is a crucial part of the management of ST-elevation myocardial infarction (STEMI). We aimed to evaluate the contributing factors to and the etiologies of a prolonged door-to-device (D2D) time.
Methods: In 2016, the D2D time was measured in all patients who were treated with PPCI at Tehran Hear Center. The major causes of a prolonged D2D time (>90 min) were determined. The second phase was then started in 2017 by focusing on the determined causes, and direct feedback was given to anyone having contributed to the delayed D2D time. The D2D time was compared between these 2 years.
Results: The mean age of the patients was 59.54±11.82 years, and 82.2% of them were men. The median D2D time decreased from 55 minutes (IQR25-75%: 40–82) in 2016 to 46 minutes (IQR25-75%: 34–70) in 2017 (P<0.001). In the first year, 79.8% of the patients had a D2D time of below 90 minutes; the figure rose to 84.1% of the patients in the second year (P=0.017). The first cause of a prolonged D2D time was missed ST-elevation in the first electrocardiogram by physician or nurse (8.4% of the cases). Along with a declining rate of missed STE to 6.7%, the median D2D time in the missed patients also decreased from 205 minutes to 177 minutes (P=0.011). The rate of ambulance arrival increased from 10.2% to 20.7% of the cases, and the median D2D time also declined from 45 (IQR25-75%: 34–55) to 34 (IQR25-75%: 25–55) in these patients (P<0.001).
Conclusion: Even in the setting of a 24/7 on-site interventionist in the hospital, the dispatch system and prehospital electrocardiograms, along with regular assessment and feedback, may improve the D2D time.
THE CORRELATION OF SELF-EFFICACY AND PEER SUPPORT TOWARDS ANXIETY PRECEDING FINAL EXAMINATIONS FACED BY 9TH GRADERS IN YOGYAKARTA
Authors: Situmorang Nina Zulida 
Published: April 2019

Purpose: The aim of this research paper is to show that Final examination pressure causes anxiety in all students, including students of a private middle school in Yogyakarta. The anxiety of students facing the final examinations is directly related to self-efficacy and peer support.
Methodology: This study uses scales to determine anxiety levels preceding final exams, self-efficacy levels, and peer support levels. These scales will be filled in with data given by 9th grade students of LI Private Junior High. The research subjects consisted of 234 9th grade students enrolled in one of Yogyakarta’s private middle schools.
Results: Based on the results, this research shows that Self-efficacy and peer support both combined have a significant relation to the anxiety preceding final exams faced by 9th grade students of ‘LI’ private middle school in Yogyakarta with F = 10,644 and a significance level of 0,000 (p<0,01).
Implications: Therefore, peer support has an effect on anxiety only when applied in tandem with self-efficacy.
Erken Çocukluk Dönemi Otizm Taramasının Çeşitli Değişkenler Açısından İncelenmesi
Authors: GÖZÜN KAHRAMAN Özlem , YUVACI Mücahit 
Published: April 2019

Amaç: Bu
çalışmanın amacı 16-36 aylık çocukların otizm taramasının yapılması ve
sonuçların çeşitli değişkenler açısından incelenmesidir. Gereç ve Yöntem:
Araştırmaya 16-36 aylık 62 kız ve 68 erkek çocuk olmak üzere toplam 130 çocuk
ve ebeveynleri katılmıştır. Araştırmada veri toplama aracı olarak Erken
Çocukluk Dönemi Otizm Tarama Ölçeği (CHAT), Denver II Gelişimsel Tarama Testi
ve kişisel bilgi formu kullanılmıştır. Çalışma grubunun betimsel niteliklerinin
belirlenmesinde çapraz tablolar kullanılmıştır. Bulgular:
Çalışmaya katılan çocukların otizm tarama ölçeğinden
aldıkları sonuçlar incelendiğinde çocukların %6,9 ‘unun yüksek riskli,
%5,4’ünün orta riskli grupta bulunduğu görülmüştür. Cinsiyete göre otizm tarama ölçeğinden aldıkları
sonuçlar incelendiğinde ise erkek çocuklarda yüksek risk oranın (%8,8) kız
çocuklardan (%4,8) daha yüksek olduğu bulunmuştur. Otizm açısından yüksek risk
grubunda olan çocukların daha çok ikinci çocuklar olduğu, sezeryan doğumla
dünyaya gelmiş çocuklarda, üniversite mezunu annelerin çocuklarında ve gelir
durumu yüksek olan ailelerin çocuklarında bu oranın daha yüksek olduğu
görülmüştür. Yüksek risk grubunda çıkan çocukların Denver II sonuçlarının da
anormal ve şüpheli çıktığı görülmüştür. Yüksek risk grubunda bulunan çocukların
orta ve düşük risk grubunda bulunan çocuklara göre televizyon izleme süre ve
oranlarının da daha yüksek olduğu dikkat çeken bulgular arasındadır.

Sonuç: Otizm
riski taşıyan çocukların erken belirlenmesi ve erken müdahale programlarıyla
gelişimlerinin desteklenmesi önemlidir. Ayrıca aileleri risk faktörleri
konusunda bilgilendirmek ve bu konuda farkındalıklarını arttırmak gereklidir.
Özellikle küçük çocuklarda televizyon otizm açısından önemli bir risk faktörü
oluşturabilir. Bu nedenle anne babaların erken yıllarda çocuklarıyla birebir
etkileşim içinde olmaları çocuklarının sağlıklı gelişimi açısından oldukça
önemlidir.
Kajian Etnosains Madura dalam Proses Produksi Garam sebagai Media Pembelajaran IPA Terpadu
Authors: Hadi Wiwin Puspita , Ahied Mochammad 
Published: April 2019

<p>Penelitian ini bertujuan untuk merekronstruksi pengetahuan asli masyarakat dalm proses produksi garam ke dalam pengetahuan ilmiah yang dijadikans sebagai media pembelajaran IPA Pengambilan data dilakukan di desa Padelegan dan desa Bunder Kecamatan Pademawu kabupaten Pamekasan.Metode penelitian yang dilakukan adalah kualitatif deskriptif dengan teknik pengambilan data melalui observasi, angket dan wawancara. Data yang diperoleh kemudian dianalisis, diverifikasi, dan direduksi kemudian dikontruski ke pengetahuan ilmiah dan diintepretasikan ke konsep sains yang ada di pembelajaran IPA. Hasil penelitian menunjukkan bahwa proses pembuatan garam yang dilakukan masyarakat dapat diinterpretasikan ke dalam pengetahuan sains dan diimplementasikan dalam pembelajaran IPA</p><p>Kata Kunci: etnosains, garam, pembelajaran IPA.</p><p><strong> </strong></p><p><strong>ABSTRACT</strong></p><p><em>This study was aimed to reconstruct science society into scientific knowledge in the production process of salt for learning material that was conducted salt farmers in Padelegan and Bunder Village, Pemekasan Regency, East Java Indonesia. The method of this study was qualitative descriptive with retrieval of data through direct observation, questionnaries, and interviews. The obtained data were analyze, veryfied, reduced and reconstruction into scientific knowledge and were interpreted. The focus of this study was tradition of salt process especially on knowledge of salt farmer about raw materials salt and crystalization of salt. The result showed that were five indigenous science from the salt production which could be recontructed into scientific knowledge.</em></p><p><em>Keywords: ethnoscience, salt, science learning.</em></p>
Preparation of Carbon-14 Labeled 2-(2-mercaptoacetamido)-3-phenylpropanoic Acid as Metallo-beta-lactamases Inhibitor (MBLI), for Coadministration with Beta-lactam Antibiotics
Authors: Maleki Ali , Taheri-Ledari Reza , Eivazzadeh-Keihan Reza , de la Guardia Miguel , Mokhtarzadeh Ahad 
Published: April 2019

Aim and Objective:
Bacteria could become resistant to β-lactam antibiotics through production of β-
lactamase enzymes like metallo-β-lactamase. 2-(2-mercaptoacetamido)-3-phenylpropanoic acid was reported
as a model inhibitor for this enzyme. In order to elucidate the mechanism of action in the body’s internal
environment, preparation of a labeled version of 2-(2-mercaptoacetamido)-3-phenylpropanoic acid finds
importance. In this regard, we report a convenient synthetic pathway for preparation of carbon-14 labeled 2-(2-
mercaptoacetamido)-3-phenylpropanoic acid.

Materials and Methods:
This study was initiated by using non-radioactive materials. Then, necessary
characterization was performed after each of the reactions. Finally, the synthesis steps were continued to
produce the target labeled product. For labeled products, the process was started from benzoic acid-[carboxyl-
14C] which has been prepared from barium 14C-carbonate. Chromatography column and NMR spectroscopy
were used for purifications and identification of desired products, respectively. Barium [14C]carbonate was
purchased from Amersham Pharmacia Biotech and was converted to [14C]benzyl bromide. Radioactivity was
determined using liquid scintillation spectrometer.

Results:
We used [14C]PhCH2Br which was previously prepared from [14C]BaCO3, H2SO4, PhMgI, LAH and
HBr, respectively. To neutralize the [14C]phenylalanine in acidic condition and to reach an isoelectric point of
phenylalanine (pH = 5.48), Pb(OH)2 was used. Next, thioacetic acid and bromo acetic acid were used to
prepare (acetylthio) acetic acid. A peptide coupling reagent was used in this stage to facilitating amide bond
formation reaction between [14C]methyl-2-amino-3-phenyl propanoate hydrochloride and (acetylthio) acetic
acid.

Conclusion:
Carbon-14 labeled 2-(2-mercaptoacetamido)-3-phenylpropanoic acid via radioactive
phenylalanine was obtained with overall chemical yield 73% and radioactivity 65.3 nCi. The labeled target
product will be used for in vivo pharmacological studies.
Ultrasonic Echolocation Device for Assisting the Visually Impaired
Authors: Mick Ben , Reddmann Nathan , Manwar Rayyan , Avanaki Kamran 
Published: April 2019

Background:Echolocation is a technique whereby the location of objects is determined via reflected sound. Currently, some visually impaired individuals use a form of echolocation to locate objects and to orient themselves. However, this method takes years of practice to accurately utilize.Aims:This paper presents the development of a sensory substitution device for visually impaired users, which gauged distances and the placement of objects.Methods:Using ultrasonic technology, the device employed a method of echolocation to increase the user's independence and mobility. The main components of this device are an ultrasound transceiver and a miniaturized Arduino board. Through research and prototyping, this technology was integrated into a biomedical application in a watch form factor which provides feedback to the user regarding the measured distance by the ultrasonic transducer.Results:The output of this process is a tactile feedback that varies in intensity proportional to the distance of the detected object. We tested the device in different scenarios including different distances from a different material. The difference between the device reading and the actual distance, from 0 to 400 cm was statistically insignificant.Conclusion:It is believed this device will boost the confidence of the user in navigation.
Anti-inflammatory Plant Polyphenolics and Cellular Action Mechanisms
Authors: Mir Reyaz H. , Masoodi Mubashir H. 
Published: April 2019

Background:
Polyphenolics, a group of natural substances with a wide distribution in the
plant kingdom present a great diversity of biological activities such as anti-oxidative, anti-inflammatory,
anti-mutagenic, anti-carcinogenic, modulation of enzyme activity, prevention of CHD, etc. The objective
of this review was to describe the relevant aspects of polyphenolics, reporting the different known
groups, the probable mechanisms by which they act as anti-inflammatory agents. An attempt was also
made to enumerate the possible leads e.g. curcumin, resveratrol, baicalein for further development.

Methods:
For peer-reviewed research literature we undertook a structured search of bibliographic databases
using a focused review question. The quality of retrieved papers was appraised using standard
tools. The systemic review consists of research using scientific databases such as PubMed, Scopus,
Science Direct, and Google Scholar.

Research:
Compounds like Quercetin, luteolin, apigenin, fisetin, wogonin, and baicalein showed antiinflammatory
activity in-vitro through different cellular mechanisms and these were also reported to
possess significant anti-inflammatory activity in animal models of inflammation.

Conclusion:
It is evident that polyphenolic compounds such as flavonoids, lignans, phloroglucinols,
stilbenes, diarylheptanoids, quinones, and phenylpropanoids exhibited significant anti-inflammatory
activity in-vivo as well as in-vitro. Although, these active compounds are not drugs per se, however,
they deserve further investigation as potential candidates for anti-inflammatory drug development
through preclinical and clinical studies.