bluuebunny/crossref_metadata_2025 huggingface dataset:
Lack of Association Between GBA Mutations and Motor Complications in European and American Parkinson’s Disease Cohorts
Authors: Maple-Grødem Jodi , Paul Kimberly C. , Dalen Ingvild , Ngo Kathie J. , Wong Darice , Macleod Angus D. , Counsell Carl E. , Bäckström David , Forsgren Lars , Tysnes Ole-Bjørn , Kusters Cynthia D.J. , Fogel Brent L. , Bronstein Jeff M. , Ritz Beate , Alves Guido
Published: July 2021

Background: Motor complications are a consequence of the chronic dopaminergic treatment of Parkinson’s disease (PD) and include levodopa-induced dyskinesia (LIDs) and motor fluctuations (MF). Currently, evidence is on lacking whether patients with GBA-associated PD differ in their risk of developing motor complications compared to the general PD population. Objective: To evaluate the association of GBA carrier status with the development of LIDS and MFs from early PD. Methods: Motor complications were recorded prospectively in 884 patients with PD from four longitudinal cohorts using part IV of the UPDRS or MDS-UPDRS. Subjects were followed for up to 11 years and the associations of GBA mutations with the development of motor complications were assessed using parametric accelerated failure time models. Results: In 439 patients from Europe, GBA mutations were detected in 53 (12.1%) patients and a total of 168 cases of LIDs and 258 cases of MF were observed. GBA carrier status was not associated with the time to develop LIDs (HR 0.78, 95%CI 0.47 to 1.26, p = 0.30) or MF (HR 1.19, 95%CI 0.84 to 1.70, p = 0.33). In the American cohorts, GBA mutations were detected in 36 (8.1%) patients and GBA carrier status was also not associated with the progression to LIDs (HR 1.08, 95%CI 0.55 to 2.14, p = 0.82) or MF (HR 1.22, 95%CI 0.74 to 2.04, p = 0.43). Conclusion: This study does not provide evidence that GBA-carrier status is associated with a higher risk of developing motor complications. Publication of studies with null results is vital to develop an accurate summary of the clinical features that impact patients with GBA-associated PD.
Discrete Bismut formula: Conditional integration by parts and a representation for delta hedging process
Authors: Akiyama Naho , Yamada Toshihiro
Published: July 2021

The paper gives discrete conditional integration by parts formula using a Malliavin calculus approach in discrete-time setting. Then the discrete Bismut formula is introduced for asymmetric random walk model and asymmetric exponential process. In particular, a new formula for delta hedging process is obtained as an extension of the Malliavin derivative representation of the delta where the conditional integration by parts formula plays a role in the proof.
Health risk assessment of rural older population
Authors: Ge Minshu , Zhu Dan , Lee Hallie
Published: July 2021

BACKGROUND: With the accelerated development of aging, the health problems of rural elderly are becoming increasingly severe. OBJECTIVE: The study aims to understand the mental health issues of the rural older population. METHODS: The risk factor analysis and the disease risk assessment are utilized to analyze the impacts of depression on older adults. First, the prevalence of depression in China’s rural older population is counted and analyzed. Next, both single and multi-factor analyses are employed to analyze the degree of depression among rural older adults quantitatively, and the existing risk factors are determined. The multiple risk factors and multi-source logistic regression algorithm establish the risk assessment model of depression in the rural older population. Finally, the risk factors of depression in older adults are calculated by analyzing and processing the above statistical data. A risk assessment model of depression is built, whose sensitivity and specificity are tested. RESULTS: Single-factor analysis and multi-factor analysis reveal 20 vital influencing factors of depression in older adults, such as cognitive ability, emotional state, and memory. The sensitivity and specificity of the risk assessment model based on multi-factor logistic regression are 87.3%80.2%, respectively, capable of effectively assessing and screening the potential population of depression among older adults. CONCLUSIONS: This model provides a scientific basis for screening out and preventing older adults’ mental health issues with depression and improving older adults’ quality of life.
RESILIENCE-ORIENTED INTERVENTIONS FOR PATIENTS WITH TRAUMATIC BRAIN INJURY: PROTOTYPES ANALYSIS AND NEW PROGRAM DEVELOPMENT
Authors: Assonov Dmytro
Published: July 2021

Resilience-focused psychotherapeutic interventions can be useful in accelerating the recovery and social reintegration of people with traumatic brain injury (TBI). The number of English-language publications in which authors discuss about resilience-oriented interventions has been growing rapidly in recent years. However, no summarizing of research on resilience-based interventions for people with traumatic brain injury has been made in recent years. The purpose of this study is to analyze and systematize modern resilience-oriented interventions for people with trauma and use them as prototypes to develop our own resilience-oriented program of psychocorrection. Articles for the last 5 years – from January 2016 to February 2021 – were analyzed. The search for scientific literature was conducted using PubMed and APA PsychNET. After analyzing the content and rejection of articles that did not meet the inclusion criteria, the review included 6 original articles, which describe 5 resilience-oriented interventions. The structure and format of the sessions of the analyzed programs are quite variable. The duration of one session varies from 30 to 90 minutes with a frequency of 1 time per week. All analyzed interventions are based on different approaches to understanding resilience and, accordingly, different methods of evaluating results. In addition, most of the analyzed psychocorrection programs focus on many phenomena and possible resilience factors and do not have a single theory or model as a basis. At the same time, a number of models that identify specific components or groups of components and designed to facilitate the selection of therapy targets have been developed in recent years. In further research and interventions, it is promising to focus on key aspects or categories, among which a number of cognitive and emotional components of resilience are distinguished. Currently, there are only the first results of the effectiveness of resilience-oriented interventions in TBI. However, these results allow us to make two important conclusions: 1) by influencing psychological processes, it is potentially possible to achieve a reduction in the intensity of traumatic brain injury symptoms; 2) resilience is a promising target for psychological interventions in traumatic brain injury. After the analysis and systematization of approaches to resilience training, we have developed our own resilience-oriented intervention. The effectiveness of our program will be studied further. Prospects for further research are development and analysis of the effectiveness of interventions aimed at cognitive and emotional components of resilience, adapted to cognitive deficits due to trauma, filled with specific training to develop new skills as well as development of interventions for traumatic brain injury in remote period. As an example of such interventions, we present the program of our own resilience-oriented intervention.
ВПЛИВ ІНСПІРАТОРНИХ М’ЯЗОВИХ ТРЕНУВАНЬ НА ПОКАЗНИКИ ТЕРАПЕВТИЧНОГО АЛЬЯНСУ У РАМКАХ ПРОГРАМИ ФІЗИЧНОЇ ТЕРАПІЇ КАРДІОХІРУРГІЧНИХ ПАЦІЄНТІВ
Authors: Vitomskyi Volodymyr
Published: July 2021

мета - оцінити вплив включення тренувань інспіраторних м’язів на формування терапевтичного альянсу у рамках стаціонарної програми фізичної терапії після кардіохірургічних втручань. У опитуванні взяли участь 88 пацієнтів, котрим проводилося кардіохірургічне втручання з стернотомією та штучним кровообігом. Пацієнтів випадковим чином розподілили у співвідношенні 1:1 на контрольну групу (КГ, n=44) та групу тренувань інспіраторних м'язів (ІМТ, n = 44). З усіма пацієнтами перед операцією проводилася коротка консультація фізичного терапевта щодо цілей та змісту програми фізичної терапії, алгоритму активізації після операції. Післяопераційний протокол фізичної терапії передбачав ранню мобілізацію, лікувальну гімнастику. Після операції респіраторна фізична терапія у КГ обмежувалася кашлем, а у групі ІМТ додатково використовувався дихальний тренажер Respironics Threshold IMT і відповідно навчання пацієнтів щодо особливостей його використання. Таким чином, для пацієнтів групи ІМТ було характерним додаткове формування та досягнення специфічних цілей та завдань при роботі з дихальними тренажерами, додаткова співпраця пацієнта з фізичним терапевтом, котра реалізовувалася у формі пояснень особливостей і алгоритму роботи, контролю практичної реалізації дихальних вправ, контролю формування правильної навички, своєчасної корекції помилок для покращення техніки, мотивування та підвищення старанності пацієнта при виконанні дихальних вправ з тренажерами. З метою оцінки рівня формування терапевтичного альянсу застосовувався опитувальник Оцінка робочого альянсу. Порівняння результатів груп за пунктами опитувальника не встановило достовірних відмінностей між вибірками у жодному пункті анкети. Порівняння результатів доменів також не встановило достовірних відмінностей між групами пацієнтів. Результати домену «ціль» склали 18 (15; 19,75) балів у КГ та 19 (15,25; 20) балів у ІМТ (р=0,259). У домені «завдання» статистичні показники КГ склали 17 (14; 18) балів, а у ІМТ - 16,5 (14; 19) балів (р=0,680). Порівняння показників домену «взаємовідносини» не встановило преваг жодної з вибірок: КГ - 16 (13,25; 18) балів, а ІМТ – 17 (13,25; 18) балів (р=0,681). Загальний показник у групах також не відрізнявся у КГ та ІМТ: 51 (43,25; 54,75) бал проти 52 (42,25; 56) бала (р=0,437). Додаткове визначення, узгодження та процес досягнення специфічних для роботи з дихальними тренажерами цілей та завдань не покращили результати терапевтичного альянсу незважаючи на те, що вправи з дихальними тренажерами були додатковою співпрацею між фізичними терапевтами та пацієнтами у групі тренувань інспіраторних м'язів.
ВНЕСОК ЖІНОК-МОРФОЛОГІВ В РОЗВИТОК КИЇВСЬКОЇ АНАТОМІЧНОЇ ШКОЛИ (ДО 180-РІЧЧЯ НАЦІОНАЛЬНОГО МЕДИЧНОГО УНІВЕРСИТЕТУ ІМЕНІ О.О. БОГОМОЛЬЦЯ)
Authors: Prysyazhnyuk Larisa , Yanchishin Andrey , Dzevulska Irina , Sinitskaya Alla , Matkivskaya Ruzhena , Ostapyuk Lyubov , Kovalchuk Oleksandr
Published: July 2021

Історичний розвиток науки неможливий без урахування зв’язків з усім попереднім досвідом людства. Всі медичні науки, в тому числі і анатомія, мають свою історію, тобто весь пройдений шлях розвитку і вдосконалення. Велике значення в розвиток як вітчизняної анатомічної науки, так і Київської анатомічної школи, внесли жінки-науковці. Окрім цього і дотепер вони продовжують виконувати важливу роль в різних напрямках роботи кафедри і Університету. Метою роботи є висвітлити внесок жінок-морфологів Київської анатомічної школи на головних етапах розвитку українських досліджень, прослідкувати тенденції і напрямки їх роботи. Нами було використано проблемно-орієнтований аналіз історичних інформаційних джерел, архівні матеріалів кафедри описової та клінічної анатомії НМУ імені О.О. Богомольця. В довоєнні та післявоєнні роки науковий пошук співробітників кафедри був спрямований в основному на вивчення лімфатичної системи. В подальшому кафедра анатомії людини займалася вивченням гемо-, лімфо- і мікроциркуляторного русла функціонально різних органів. І за цей період жінками кафедри були захищені ряд кандидатських та докторських дисертацій. В останні роки науковий пошук на кафедрі анатомії людини був спрямований на вивчення морфологічних змін в органах при опіковій хворобі та дії різних чинників зовнішнього середовища в організмі. І в цьому напрямку жінки кафедри досить плідно працюють. Жінки-анатоми беруть активну участь в організації і проведенні багатьох сучасних наукових досліджень, в наукових конференціях, симпозіумах, з’їздах, є співавторами кількох патентів і авторських свідоцтв, монографій, навчальних посібників,  зробили значний внесок в навчально-методичну роботу, були співавторами методичних рекомендацій для викладачів та студентів. Жінки кафедри проходили закордонне стажування, вели активну громадську роботу. Науково-педагогічна робота жінок кафедри за вагомий внесок в розвиток сфери охорони здоров’я, багаторічну сумлінну працю та високий професіоналізм, була відмічена урядовими нагородами, почесними грамотами Університету і Міністерства охорони здоров’я України. Сумлінною працею і наполегливістю у ставленні до своєї справи були переповнені життєві шляхи трудолюбивих, цілеспрямованих жінок Київської анатомічної школи. Їх педагогічні заслуги, щирі намагання дати глибокі знання своїм учням ставали прикладом для наступних поколінь.
ПОЛІМОРФІЗМ G20210A ГЕНА F2 ТА ЙОГО ЗВ'ЯЗОК З АКТИВНІСТЮ ПЛАЗМОВОГО ГЕМОСТАЗУ У ПАЦІЄНТІВ З ГОСТРИМИ КОРОНАРНИМИ СИНДРОМАМИ, АСОЦІЙОВАНИМИ З ЦУКРОВИМ ДІАБЕТОМ 2 ТИПУ
Authors: Karpenko Olena
Published: July 2021

Складні захворювання, такі як ішемічна хвороба серця та цукровий діабет, спричинені нелінійною взаємодією численних генетичних та екологічних факторів ризику. Характеристика не тільки генів-кандидатів, а й складних взаємодій між ними є, очевидно, більш потужним підходом до вивчення таких захворювань. Невідповідність даних різних досліджень пояснюється тим, що генетичний ризик ішемічної хвороби серця базується не на дії окремого гена, а на взаємодії між декількома патофізіологічними шляхами, контрольованими кількома генами, та іншими факторами ризику. Метою дослідження стало визначення стану активності згортання крові у пацієнтів з ізольованим та коморбідним перебігом гострого коронарного синдрому та цукрового діабету 2 типу залежно від поліморфізму G20210A гена F2. Матеріали та методи: В процесі дослідження нами було обстежено 60 хворих, які проходили лікування у відділенні невідкладної кардіології: 30 хворих на гострий коронарний синдром, 30 хворих на гострий коронарний синдром та цукровий діабет та 15 осіб, що склали групу контролю. Для молекулярно-генетичного аналізу використовували зразки ДНК пацієнтів, виділені з венозної крові сорбентним методом. Поліморфізм G20210A гена F2 визначали методом полімеразної ланцюгової реакції з використанням двопраймерної системи та готових реагентів («Синтол», Росія) на апараті Applied Biosystems 7500. Статистична обробка результатів здійснювалася за допомогою програми SPSS-23. Результати: Проаналізувавши дані, можемо вказати на відсутність зв’язку між мутацією гена F2 та активацією процесів згортання  у групі хворих на гострий коронарний синдром. Висновки: Таким чином, у групі пацієнтів з гострим коронарним синдромом не виявлено значущої залежності між показниками згортання крові, антикоагуляційною системою крові та поліморфізмами G20210A.
ISTIKHDAMU LU’BAH BERBURU HARTA KARUN LI TARQIYATI ISTI’AB AL MUFRADAT LADAYYA THULABAH BI SMA N 4 LANGSA
Authors: Wahyuni Sri , M.Fadli
Published: July 2021

Pembelajaran mufradat memiliki hubungan yang kuat dengan pembelajaran maharah kebahasaan yang hadir dalam pembelajaran bahasa arab dari segi memahami judul dan tujuannya sama seperti bahasa penghubung, sama-sama memiliki tujuan yang penting dari segi pembelajaran. Dan tujuan penelitian ini untuk mengetahui penggunaan permainan berburu harta karun pada pembelajaran mufradat dan untuk mengetahui efektivitas penggunaan permainan berburu harta karun pada pembelajaran mufradat dalam meningkatkan kemampuan siswa.Dan populasi pada penelitian ini seluruh siswa kelas sepuluh yang ada  di SMA N 4 Langsa tahun ajaran 2019/2020 dengan jumlah siswa 96 siswa, dan sampel kelas XIPS1 sebagai kelas eksperimen dan XIPS2 sebagai kelas kontrol . Dan penelitian ini menggunakan pendekatan kuantitatif dengan metode eksperimen. Dan peneliti ini  menggunakan observasi, wawancara, dan tes untuk mengumpulkan data dan informasi. Sesudah peneliti melakukan penelitian maka hasil penelitian ini adalah penggunaan permainan berburu harta karun pada pembelajaran mufradat sesuai dengan teori dan penggunaan permainan berburu harta karun efektif pada pembelajaran mufradat dalam meningkatkan penguasaan kosakata siswa dengan bukti thitung  lebih besar dari ttabel  dengan nilai 7,28>2,000 maka hipotesis di terima.
Encoded Weakening of the European Integration – The EU-specific Vectors of Disorientegration
Authors: Kovács Olivér
Published: July 2021

The paper attempts to contribute to the better understanding of how the centrifugal force towards  weakening European integration has developed by  identifying the EU-specific vectors of such gradient. We  argue that disorientegration is an echo effect of a complex  amalgam of mutually intertwined and interrelated mechanisms embedded secularly into our European integration process. The paper also addresses whether  secular stagnation adds to that centrifugal force. The paper finally outlines at least six potential principles of reversing  the European disorientegration by cultivating contingency governance.
The Relationship Between Increased Debt Ratio and Economic Growth in the European Union: The Granger Causality Approach
Authors: Marton Ádám
Published: July 2021

Increased government debt rates in recent years can be easily financed in the current global economic environment characterised by liquidity abundance. Nevertheless, the  debt ratios represent a potential threat under the surface,  which could lead to significant macroeconomic problems in  the future. The purpose of the paper is to contribute to the  debate in the empirical studies between public debt and  economic growth, as well as external debt and economic  growth. During the analyses, the relationship between  variables was examined using the panel Granger causality  test with the Dumitrescu–Hurlin test in the Member States  of the European Union. The main findings of the study are  that there is a unidirectional causal effect between public  debt and economic growth, that is, only debt impacts on  the economic growth. In case of external debt and  economic growth there is also a unidirectional effect, but it  is in the reverse direction. In addition, the pre-crisis and  post-crisis period was also examined, on the basis of which  it can be concluded that before the crisis, the nature of the  relationship was bidirectional between public debt and  economic growth, whereas after the crisis the debt had an  impact on the economy growth, and the reverse effect does  not exist.
The Role of Transport in Catching Up of New Member States
Authors: Szilágyi Balázs
Published: July 2021

New members joined the European Union in 2004 in the  hope of catching up. One of the fields where new members  are lagging is transport. After joining the EU, investments in transport infrastructure and transport equipment have  risen remarkably, mainly due to EU funding. At the same  time, GDP growth of new members has exceeded the EU  average. This paper examines the connection between  investment in transport and economic growth in the  European Union focusing on the group of its Central and  Eastern European new members. Direct effects of  investments, indirect effects on productivity and welfare, as  well as crowding in effects on further investments are  considered. This paper aims to identify issues for further  research and to give an outlook for the decade of the  2020s.
A magyarországi bankfiókhálózat területi elhelyezkedésének és klasztereződésének vizsgálata az európai bankfiókbezárási trend közepette 2020-ban
Authors: El-Meouch Nedim Márton , Alpek B. Levente
Published: July 2021

Az Európai Unió egészében a bankfiókok számának jelentős csökkenését tapasztaltuk az elmúlt években, amellyel  összefüggésben felmerül a bankfiókok magyarországi területi rendelkezésre állásának kérdésköre. A tanulmány globális és lokális Moran’s I statisztikákkal, valamint Getis–Ord féle G* hotspot elemzéssel a magyar bankfiókok elhelyezkedésének területi autokorrelációját és klasztereződését vizsgálja. Az eredmények alapján a bankfiókok száma Magyarországon települési szinten területileg pozitívan autokorrelált a 2020. januári állapot szerint. A települések bankfiókszámot tekintve klaszterekbe rendeződnek, ahol Budapest és vonzáskörzete egy  jelentősebb csomópontnak számít, amelyhez hasonló az  országban máshol nem található. Kiterjedtebb cold  spotokat a Nyugat- és Dél-Dunántúl régió, valamint Észak- Magyarország és Szabolcs-Szatmár-Bereg megye országhatár menti térségeiben azonosítottunk elsősorban.
Effects of different ammonium lignosulfonate contents on the crystallization, rheological behaviors, and thermal and mechanical properties of ethylene propylene diene monomer/polypropylene/ammonium lignosulfonate composites
Authors: GOU RUI , GUO MINGHUI
Published: July 2021

Thermoplastic elastomer (TPE), made from ethylene propylene diene monomer (EPDM) and poly-propylene (PP) based on reactive blending, has an excellent processing performance and characteristics and a wide range of applications. However, there are currently no reports in the literature regarding the usage of TPE in making composite boards. In this paper, EPDM, PP, and ammonium lignosulfonate (AL) were used as the raw materials, poly-ethylene wax was used as the plasticizer, and a dicumyl peroxide vulcanization system with dynamic vulcanization was used to make a new kind of composite material. This research studied the influences of the AL contents on the crystallization behaviors, rheological properties, thermal properties, and mechanical properties of the composites. The results showed that the AL content had a noticeable impact on the performance of the composite board. Accordingly, this kind of composite material can be used as an elastomer material for the core layer of laminated flooring.
On increasing wet-web strength with adhesive polymers
Authors: PELTON ROBERT , YANG DONG , GUSTAFSSON EMIL
Published: July 2021

Fiber-fiber adhesion, called “bonding” in the old paper physics literature, is a critical component of the overall strength of dry paper. With freshly formed very wet pulp fiber webs, all evidence suggests there are no fiber-fiber crossings with significant adhesive joint strength. With water removal, a point will be reached where fiber-fiber adhesion starts to contribute to the overall wet-web strength. The literature reveals very few examples of polymers that increase fiber-fiber joint strength in freshly formed webs. Here, we summarize the literature and explain why it is so difficult to promote fiber-fiber wet adhesion with polymers. Nevertheless, ongoing research in areas as diverse as tissue engineering scaffolds and biomimetic adhe-sives gives clues to future developments. Advances in paper machine engineering have lessened the importance of wet-web strength. By contrast, a critical issue in many of the evolving nanocellulose technologies is the strength of objects first formed by aqueous processing, the green strength—the strength of wet bodies before drying. For exam-ple, 3-D printed nanocellulose objects and ultralow density cellulosic aerogels can be destroyed by capillary forces during drying. There is a need for adhesives that strengthen freshly formed, wet lignocellulosic joints.
A novel unit operation to remove hydrophobic contaminants
Authors: HOUTMAN CARL , AZIZ SALMAN , DE JONG ROBERT , DOSHI MAHENDRA
Published: July 2021

For mills making paper with recovered fiber, removal of hydrophobic contaminants is essential for trouble-free operation of paper machines. Significant cost savings on paper machine operation can be achieved by reducing deposits, which results in better quality, reduced downtime, increased fiber yield, and reduced energy consumption.
Bubble nucleation separation (BNS) is a relatively new process for removing hydrophobic particles. When vacu-um is applied to a slurry, dissolved gas bubbles nucleate on hydrophobic particles and drag them to the surface for easy removal. We constructed a 16-L batch unit to evaluate the effect of operating parameters on removal of hydro-phobic particles, using statistical design of experiments. These results were used to guide our design of a 16-L con-tinuous unit. We tested this unit on laboratory and mill samples. The removal of 60%–80% of hydrophobic particles was achieved with a low reject rate of < 2%.
Following on this success, we built a 200-L pilot unit and tested it in our pilot plant. With promising results there, we installed the pilot unit at a commercial paper recycling mill. Over the course of several mill trials, we showed that it was possible to remove a considerable amount of suspended solids from paper machine white water with less than 2% rejects. Unfortunately, due to the unit only treating 50 L/min and the mill flow being 12000 L/min, we were not able treat a sufficient portion of the white water to know whether a large-scale implementation of BNS would improve paper machine runnability.
The role of gas dispersion in the oxygen delignification process
Authors: KAYHKO JARI , PELTONEN KARI , MUTIKAINEN HEIKKI , KOPRA RIKU , ELORANTA HANNU , PESONEN ANNA , VAN HEININGEN ADRIAAN
Published: July 2021

Oxygen delignification is an essential part of the pulp production process. Delignification occurs with the aid of alkali and dissolved oxygen. Dissolved oxygen is obtained by dispersing oxygen gas into the pulp suspension by using efficient mixers. Little is known about the state of oxygen gas dispersion and its effect on oxy-gen delignification kinetics and efficiency. This paper will present the results for the effect of gas bubble size on the performance of oxygen delignification. The results are mainly based on detailed studies made in a Finnish hardwood mill where the oxygen bubble size distribution could be altered at the feed of the reactor. An essential aspect of these studies was the use of a new continuous inline gas bubble size measurement system to simultaneously determine the bubble size distribution at the feed and top of the reactor. Information about oxygen consumption in the reactor could also be obtained through the bubble size measurements. Accordingly, these studies quantify the effect of oxygen bubble size on the kappa reduction of the pulp. The effect of different chemical factors on the oxygen bubble size is also studied. Finally, the relationship between the gas bubble size and the liquid phase oxygen mass transfer coefficient (kLa) is presented. This connects the bubble size to the kappa reduction rate. Based on the presented modeling approach and the evaluation of practical factors that are not taken into account in the modeling, it was concluded that the volumetric average oxygen bubble size should preferably be smaller than 0.2 mm in practice. The information obtained with the new gas bubble size measurement system and the presented modeling approach give a very new basis for understanding, monitoring, adjusting, and designing oxygen delignification processes.
Impact and feasibility of a membrane pre-concentration step in kraft recovery
Authors: KLEIMAN-LYNCH MAX , RIVERA DIEGO F. , FRAYNE STEPHEN H. , KELLER BRENT D.
Published: July 2021

Emerging robust membrane systems can perform the first section of black liquor (BL) concentration by separating clean water from the black liquor stream using only mechanical pressure. By doing so, they can reduce the steam and energy required for BL concentration. Because of the high osmotic pressure of strong BL, a membrane system would not replace evaporators but would operate in series, performing the first section of BL concentration.
In this work, we use a multi-effect evaporator (MEE) model to quantify the steam and energy savings associated with installing membrane systems of different sizes. When maintaining a constant BL solids throughput, we find that a pulp mill could reduce steam usage in its evaporators by up to 65%. Alternatively, a membrane system could also serve to increase BL throughput of the recovery train. We find that a membrane system capable of concentrating BL to 25% could double the BL solids throughput of a mill’s evaporators at the same steam usage. We also demonstrate that installing a membrane system before an MEE would minimally affect key operating parameters such as steam pressures and BL solids concentrations in each effect. This indicates that installing a membrane pre-concentration system would be nonintrusive to a mill’s operations.
Freyre e Freud
Authors: SOUZA NETO ARLINDO
Published: July 2021

Neste ensaio, a partir da ideia de “paisagem social brasileira”, cunhada por Gilberto Freyre, e da concepção de “desamparo” presente na obra Sigmund Freud, os autores desenvolvem algumas interpretações sócio psicanalíticas referentes à sociedade brasileira contemporânea. Como se trata de um ensaio, são realizadas algumas especulações interpretativas no que tange à formação social do Brasil e do “modo de ser brasileiro”, bem como dos mecanismos e arranjos sociais que ao longo das décadas foram estabelecidos na/pela sociedade e no/pelo psiquismo dos brasileiros, desembocando na civilização dos contrastes.
Orcein and DAPI-stained karyotype analysis of Alocasia macrorrhizos (L.) G. Don
Authors: Warasy Ashma Ahmed
Published: July 2021

Karyotype analyses are required for the identification, characterization, and genetic improvement of any organism. Alocasia macrorrhizos (L.) G. Don. was investigated cytogenetically to determine the karyotypic features. Complex chromocenter type, of interphase nuclei, and gradient type of prophase chromosomes were found in this study. Alocasia macrorrhizos was found to possesses 2n=28 chromosomes. The total length of the 2n chromosome complement was recorded as 98.83±1.39 μm. The range of chromosomal length was 2.50±0.10-4.70±0.10 μm. A gradual decrease in chromosomal length was observed. The total form (TF%) value was found to be 43.58%, Karyotype symmetry index (Syi %) was 77.00 % and karyotype asymmetry index (AsK %) was 56.66%. The centromeric formula was 18m+4sm+2ac, representing asymmetric karyotype. In DAPI banding, the 1.48% positive banded region indicates the lower amount of AT rich repeats in this material. Therefore, Alocasia macrorrhizos could be authentically characterized through karyotype analysis.

J. Bangladesh Acad. Sci. 45(1); 27-35: June 2021
Measurement of natural radioactivity and its health hazards associated with the use of different branded cement samples collected from different manufactures in Dhaka city using gamma spectrometry
Authors: Pervin Shikha , Dewan Md Jafor , Apon Ashif Mahamud , Siraz MM Mahfuz , Yeasmin Selina
Published: July 2021

The radioactivity of naturally occurring radionuclides 226Ra, 232Th, and 40K was determined in thirteen cement samples collected from different manufactures of Dhaka city. The measurement was performed by gammaray spectrometry system using high purity germanium (HPGe) detector. The average activity of 226Ra, 232Th, and 40K in cement samples are fon und to be 30.23±15.04 Bqkg-1, 20.10±11.76 Bqkg-1 and 145.27±24.14 Bqkg-1, respectively. The average values of radium equivalent activity (Raeq), absorbed dose rates (D), internal hazard and external hazard index (Hex), and annual effective dose equivalent are 370 Bqkg-1, 0.27, 0.18, and 27.99 nGyh-1, respectively. The average annual effective dose is found 0.13 mSvy-1, which is less than the recommended value (1 mSvy-1) by the International Commission on Radiological Protection (ICRP-60, 1990), as the maximum permissible annual effective dose to the members of the public. The present study results are discussed and compared with those reported in similar studies and with internationally recommended values. No artificial radioactivity was found in the present study. The results show that the analyzed cement samples do not pose any significant radiation hazard from naturally occurring radionuclides 226Ra, 232Th and 40K reported here and also considered safe for use in buildings construction.

J. Bangladesh Acad. Sci. 45(1); 95-104: June 2021
Metode Diskusi Dan Tanya Jawab Dalam Pembelajaran SKI Untuk Meningkatkan Keaktifan Belajar Siswa Kelas VII - H MTs Al- Mahrusiyah Lirboyo Kediri
Authors: Masrukin Ahmad , Arba'i Ahmad
Published: July 2021

This research article aims to determine the increase in student activity in the learning process in class VII H Mts Al Mahrusiyah Lirboyo Kediri by using learning methods in the form of discussion and question and answer methods. This research is classroom action research (PTK). The data collection technique is observation with descriptive qualitative and quantitative analysis techniques. The results of this study are: (1) Teachers in the learning process question and answer method in the first cycle, and there is a response from students from the questions asked, (2) in the second cycle of the 3rd and 4th meetings the teacher starts to apply the method of discussion and question and answer, in this cycle the activity and enthusiasm of students in learning increased. This can be seen as an increase in the number of students active in the pre-cycle, cycle I and cycle II. And increasing student learning activeness has increased from 7.14% to 53.57%.
UJI EFEKTIVITAS ASAP CAIR CANGKANG BUAH Hevea braziliensis TERHADAP AKTIVITAS BAKTERI Escherichia coli
Authors: Oktarina Dinda , Sumpono Sumpono , Elvia Rina
Published: July 2021

This research purpose to determine the effectiveness of the liquid smoke of the Hevea braziliensis  fruit shell  against the activity of Escherichia coli bacteria. The preparation and purification of liquid smoke is carried out by 4 stages: pyrolysis , sedimentation, stage 1 and stage  2  distillation. This research was started with total acidity test, phenol level, pH and density with result of measurement 4,725% total acid content, 0,84% phenol content, 2,548 pH and 1,004 in density . An antibacterial test  using disc diffusion method by looking at the diameter of the clear zone. There are six concentrations of liquid smoke of  H.braziliensis  rubber shell used, negative control using aquades and positive control using ciprofloxacin . An  effective concentration was found in inhibiting E.coli is 100% concentration with a clear zone diameter of 11.3 mm. The result of analysis using One Way ANOVA showed F count (4.42)> F table (3,23), then H0 rejected, meaning there is a significant difference of influence of concentration to the diameter of clear zone produced.
PEMANFAATAN ARANG AKTIF SABUT KELAPA SAWIT SEBAGAI ADSOBEN ZAT WARNA SINTETIS REACTIVE RED-120 DAN DIRECT GREEN -26
Authors: Puspita Melfi , Firdaus M. Lutfi , Nurhamidah Nurhamidah
Published: July 2021

The problem of environmental polution caused by waste of batik industry lately is increasing, so it needed a method to overcome that problem. The aim of this study was to determine the ability of activated charcoal from coconut fiber palm in adsorbing Reactive Red-120 and Direct Green-26 dyes in waste of batik along with determining the parameters of isotherms adsorption using UV-Vis Spectrophotometer analysis method. Variations of pH, contact time, adsorbent weight and temperature were carried out as variable to obtain optimum conditions of the adsorption process. The optimum of conditions for Reactive Red-120  occured at pH 3 and a contact time of 30 minutes, while Direct Green-26  occurred at pH 4 and a contact time of 40 minutes, with each adsorbent weight 150 mg and the temperature 30 °C. Adsorption isotherms determined by Freundlich and Langmuir models with maximum adsorption capacity (Qmax) were obtained for the Reactive Red-120  was 400 mg/g, while Direct Green-26 is 169 mg/g.
PENERAPAN MODEL DISCOVERY LEARNING DENGAN MENGGUNAKAN MEDIA VIDEO UNTUK MENINGKATKAN AKTIVITAS BELAJAR DAN HASIL BELAJAR SISWA KELAS XI IPA 1 SMAN 1 KOTA BENGKULU
Authors: Medianty Sitti Utami , Bahar Amrul , Elvinawati Elvinawati
Published: July 2021

[APPLICATION OF DISCOVERY LEARNING MODEL BY USING VIDEO MEDIA TO INCREASE LEARNING ACTIVITIES AND STUDENT LEARNING RESULT CLASS XI IPA 1 SMAN 1 BENGKULU CITY]. The research has goals to improve the activity and learning outcomes chemistry at XI IPA 1 class in SMA Negeri 1 Bengkulu that consist of 30 students: 23 girls and 7 boys. This study is research of class action on thermochemistry subjects by discovery learning model. This research consist three cycle on four stage: planning, action, absorption, and reflection. The data collected using test and non test that consist of post test and observation sheet of activity teacher and student. The data processed using quantitative simple analysis techniques: average score of observation sheet of activity teacher and student, average score, absorption percentage clasical, andclasssical learning completness percentage. From the reseult, we can conculded that chemistry learning process applying discovery learning model using video can improve activity and outcomes learning chemistry student. It can be see from the average score of students. In the first cycle is 69.33 in which the percentage of classical absorption is 86.67 and classical learning completeness is 66.67. The average score of the second cycle is 71,33 in which the percentage of classical absorption is 89.17 and classical learning completeness is 73.33. The students’ average score of the third cycle is 81.33 in which the percentage of classical absorption is 90.37 and classical learning completeness is 86.67. The teacher’s activities of the learning process in the first cycle get average score 26.5 and it is good category, the second cycle is 27.5 and it is good category, the third cycle is 30 and it is good category too. Meanwhile, the student’s activities in the first cycle get average score 22.5 and it is good category, the second cycle is 25 and it is a good category, the third cycle is 27 and it is good category.
EKSPERIMEN KINETIKA ENZIM MENGGUNAKAN MODEL INKUIRI TERBIMBING UNTUK MENINGKATKAN KETRAMPILAN BERPIKIR KREATIF MAHASISWA
Authors: Amida Nadia , Supriyanti F.M. Titin , Liliasari Liliasari
Published: July 2021

[EXPERIMENT OF ENZYME KINETICS USING GUIDED INQUIRY MODEL FOR ENHANCING CREATIVE THINGKING SKILLS] Purpose of this study was enhancing creative thinking skills of students using guided inquiry model through experiments of enzyme kinetics based on local materials. Method of this research was quasi-experimental methods, with pretest-posttest nonequivalent control group design. Subjects of this study were chemistry students enrolled in biochemistry lab course, consisted of 18 students in the experimental class and 19 students in control class. Instrument in this study were essay test that involves 3 indikators of creative thinking  skills (i.e. fluency, flexibility, and elaboration) and also student worksheets. The results showed that the experiments of kinetics enzyme  using guided inquiry model have been enhance creative thinking skills in medium category with a value of N-gain average of 0.66. Two indikators classified in the high category are fluency and elaborationwith the value of N-gain 0,71. Meanwhile, indikator of flexibility in the medium category with a value of N-gain 0,56.
PEMBUATAN DAN KARAKTERISASI METIL SELULOSA DARI BONGGOL DAN KULIT NANAS (Ananas comosus)
Authors: Rahmidar Lena , Wahidiniawati Seruni , Sudiarti Tety
Published: July 2021

[MAKING AND CHARACTERIZATION OF CELLULOSE METHOD OF BONGGOL AND LEATHER LEATHER (Ananas comosus)] Wastes of core and  peel of pineapple are often not utilized properly, in fact the waste has nutritional content that can be useful. Carbohydrate content in the waste is large enough and allows to be utilized. The purpose of this research is for converting glucose into cellulose and synthesized into methylcellulose. The first stage is glucose from core and peel of pineapple converted into microbial cellulose with Acetobacter xylinum bacteria with the addition of nitrogen and carbon sources. The second stage is synthesis of methylcellulose with methylene chloride and the solvent aquadest/acetone. The dried microbial cellulose was firstly swelled with NaOH addition, then methylation by addition of solvent and methylene chloride and then refluxed at 50-60. Then methyl cellulose neutralized, washed and dried at 50.The FTIR results showed typical cellulose uptake for cellulose microbial pineapple core at wave number 3377.36 cm-1 for OH bonds and 2935.66 cm-1 for CH bonds and in cellulose microbialpineapple peel at wave number 3377.36 cm-1 for OH bonds and 2935.66 cm-1 for the CH bonds. The ratio OH/CH of methyl cellulose-acetone has a smaller value in the core and peel of pineapple concluded that acetone is more efficient to use as a solvent at the methylation. The substitution value of the core and peel of pineapple skin is estimated to below based on the solubility test results.
PENERAPAN MODEL PEMBELAJARAN TIME TOKEN UNTUK MENINGKATKAN KEMAMPUAN BERTANYA DAN HASIL BELAJAR KIMIA SISWA KELAS X MIPA 1 SMAN 09 KOTA BENGKULU TAHUN AJARAN 2017/2018
Authors: Damayanti Ufi , Bahar Amrul , Rohiat Salastri
Published: July 2021

Research the act of this class carried out of date 01 February 2018 – 08 March 2018aims to (1) enhance the capacity of ask a student to lose their; (2) increase yields of of students to study, declaration of relinquishing his her to see liveliness of teachers and students in the process of learning to promote disorder to. A subject in this research is a student X MIPA 1 SMAN 09 city Bengkulu school year 2017/2018 on the subject of redox reactions, which amounted to 28 students. The research results show that the implementation of learning cooperative type time token can improve the ability ask students, improve learning outcomes students, and improving liveliness teachers and students in learning in subject matter reaction redoks the result of which have be completed in cycle 3rd. On the ability of cycle I ask students 75 % rate of C1, 15 % rate of C2, 10 % rate of C3 and 28,57 % student learning. Cycle II ask students 65,22 % rate of C1, 21,74 % rate of C2, 13.04 % rate of C3 with 64,29 % student learning. The cycle III ask student 4,35 % rate of C1, 78,26 % rate of C2, and 17,39 % rate of C3, with 89,29 % student learning (who has achieved indicators of the quality of the success of research and KKM). To liveliness teachers from the cycle I, II, and III each 25, 27, and 30, while liveliness students in each 21, 24, and 28
PENGEMBANGAN E-MODUL KIMIA BERBASIS KEMAMPUAN BERPIKIR KREATIF DENGAN MENGGUNAKAN KVISOFT FLIPBOOK MAKER
Authors: Romayanti Cici , Sundaryono Agus , Handayani Dewi
Published: July 2021

The aim of this research is to determining level of feasibility and response of students from the development of e-modules in chemistry course based on creative thinking ability using the Kvisoft Flipbook Maker on material electrolyte and non-electrolyte solution in SMA Negeri 9 Kota Bengkulu. The type of research used is R & D (Research & Development), which uses the ADDIE development model (analysis, design, development, implementation, evaluation) with the limitation of stage until implementation. The results of this research show that the chemistry-based E-Module based on creative very feasible and feasible to use with the validation results from media experts was 97.7%, material expert validation was 90.2%, readability the small group trials conducted by 9 students in class X MIPA 2 was 97.04% and student responses in the large group trial conducted by 25 students in class X MIPA 1 was 86.4% (very feasible category). This shows that e-modules in chemistry course based on the ability to think creatively by using the kvisoft flipbook maker are very suitable to be used in the learning process
Upaya Meningkatkan Aktivitas Belajar Siswa dalam Pembelajaran IPA Melalui Model Pembelajaran Kooperatif Tipe Jigsaw di SMP Negeri 7 Bukittinggi Provinsi Sumatra Barat
Authors: Nilawati Nilawati
Published: July 2021

This study aims to increase student learning activities in science learning through the Jigsaw type learning model at SMPN 7 Bukittinggi. This research method used classroom action research which is carried out in 2 cycles. The instrument used is an observation sheet. The data analysis technique of this research used quantitative and qualitative descriptive analysis. The results of this study indicate that based on the results of the first cycle of student activity in bringing source books/reading 50.3%, cooperation in groups 59.6%, expressing opinions in large groups 35.7%, working on questions in groups 45.7%, pointing to hands answered the quiz 24%. While in the second cycle there was a significant increase, in the aspect of bringing source books/reading 67.5%, cooperation in groups 74%, expressing opinions in large groups 59%, working on questions in groups 76%, and pointing hands to answer quizzes 65% . This shows that the learning activities of grade VII-8 students of SMPN 7 Bukitinggi are in the high category. So it can be concluded that the Jigsaw type learning model can improve student learning activities in science learning.
Penerapan Clinical Supervision untuk Meningkatkan Class Asessment Management bagi Guru Sekolah Dasar Binaan
Authors: Muhsin H
Published: July 2021

This study aims to apply clinical supervision to improve the ability of elementary school teachers in conducting class assessments. The method used utilizes three cycles of action research involving 23 teachers from 10 primary schools under the guidance of North Batukliang District, Central Lombok Regency. The data has been collected through the observation of the class assessment ability in each action process. The data analysis technique of this study used quantitative and qualitative descriptive analysis. The results obtained that the first cycle is below the expected completeness percentage (≤85%) which is 67.17%, while in the second cycle it also does not meet the completeness percentage which is 77.17%, and in the third cycle it is 85.86 % (Completed). The study concluded that the implementation of clinical supervision to improve the class assessment ability of elementary school teachers had a significant impact. In the future, these results can be a reference for supervisors in conducting school supervision to improve the competence of other teachers.
Peningkatan Hasil Belajar Matematika dengan Media Google Classroom dan WhatsApp Sebagai Media Pembelajaran Daring pada Masa Pandemi Covid-19 bagi Siswa Kelas XII Busana 2 SMK Negeri 3 Baubau
Authors: Amlin Amlin
Published: July 2021

This study aims to describe the improvement of student learning outcomes in mathematics subjects in statistics through Google Classroom and WhatsApp media. This research is a classroom action research in which the teacher plays a direct role in the online learning process. The subjects in this study were 32 students of class XII Busana 2 SMK Negeri 3 Baubau and the object of this research was to increase student learning outcomes with Google Classroom and WhatsApp media. The research instrument uses a test (daily test) in the form of an essay. The test is used to find out the results of learning mathematics. Based on the data analysis of students' mathematics learning outcomes in cycle I, there were 23 students who completed (71.88 %) and those who had not completed 9 (28.12 %), while in cycle II who completed it became 27 students (84.38 %) and unfinished 5 students (15.62 %) with an increase in the average value of the cycle I is 73.13 while the average value of the cycle II is 81.56 which has increased significantly, so based on the results of the data analysis obtained it can be concluded that with Google Classroom and WhatsApp media can improve student learning outcomes for class XII Busana 2 SMK Negeri 3 Baubau