bluuebunny/crossref_metadata_2025_split huggingface dataset:
Con đường mới tổng hợp 21‐acetoxypregn‐1,4,9(11)‐trien‐17α,21‐diol‐3,20‐dion
Authors: Diệp Nguyễn Thị , Huy Lưu Đức 
Published: March 2018

AbstractIn this paper, we present an convernient procedure for synthesis of 21‐acetoxypregna‐1,4,9(11)‐triene‐17α,21‐diol‐3,20‐dione from 9α‐hydroxyandrostenedione, an key intermediate for synthesis of corticoids such as prednisolone, dexamethasone, betamethasone, etc. The strusture of the product and its intermediates was examined by physical methods such as: IR, MS, 1H and 13C‐NMR
Nghiên cứu thành phần hóa học loài hải miên Rhabdastrella providentiae
Authors: Dung Dương Thị , Hằng Đan Thị Thúy , Yến Phạm Hải , Nhiệm Nguyễn Xuân , Quang Trần Hồng , Tài Bùi Hữu , Kiệm Phan Văn 
Published: March 2018

AbstractPrimary chemical investigation on the sponge Rhabdastrella providentiae resulted in the isolation of four none‐polar constituents, including jaspiferin A (1), globostelletin D (2), mollisolactone A (3), and gibepyrone F (4). Their chemical structures were elucidated by HR‐ESI‐MS, 1D‐, 2D‐NMR spectra, as well as in comparison with those reported in the literature. This is the first report of those compounds from the sponge R. providentiae.
Một số hợp chất triterpenoid saponin và xanthone glucoside từ cây viễn chí nhật (Polygala japonica Houtt.)
Authors: Quang Trần Hồng , Công Phạm Thành , Yến Dương Thị Hải , Nhiệm Nguyễn Xuân , Yến Phạm Hải , Ngân Nguyễn Thị Thanh , Kiệm Phan Văn 
Published: March 2018

AbstractPhytochemical study of the roots of Polygala japonica Houtt. resulted in the isolation of four oleanane triterpenoid saponins, tenuifolin (1), polygalasaponin XXVIII (2), polygalasaponin XLVII (3), fallaxsaponin A (4) and a C‐glucosylxanthone, 7‐O‐methylmangiferin (5). Their chemical structures were characterized by extensive spectroscopic analyses, including 1D and 2D‐NMR spectra and MS in comparison with the data reported in the literature.
Nghiên cứu chế tạo blend giữa polypropylene (PP) và cao su butadiene acrylonitril (NBR) Phần 2. Qui hoạch hóa thực nghiệm quá trình chế tạo blend NBR/PP
Authors: Thủy Nguyễn Thị Thu , Tùng Nguyễn Huy , Hưng Đặng Việt , Chương Bùi 
Published: March 2018

AbstractBlend of polypropylene and nitril rubber was conducted via dynamic vulcanization in Brabender Plasticoder. MA‐g‐PP was used as coupling agent in this blend. The optimum of blending process was investgated using Design Expert software with three factor PP/NBR ratio, MA‐g‐PP concentration, mixing time and two levels 23 to evaluate the effects of these factors on the the tensile strength of blend. Analysis of variance ANOVA was showed the interaction of these factors. The recurrence equation was as following: TS = 8.6‐1.29A + 0.72C + 0.74D + 0.35 AC. According to the recurrence equation, the PP/NBR ratio had the showed the greatest influence on the tensile strength of blend.
Nghiên cứuchuyển hóa nhóm amino của 5‐amino‐7‐(cacboxymetoxy)‐6‐hydroxyquinolini‐3‐sulfonat
Authors: Đĩnh Nguyễn Hữu , Thủy Nguyễn Thị , Hoa Lê Thị , Lan Hoàng Thị Tuyết 
Published: March 2018

AbstractSeveral reactions of 5‐amino‐7‐(cacboxymetoxy)‐6‐hydroxyquinolinium‐3‐sulfonate (QNH2), the new amino‐quinolin synthesized from eugenol, were carried out. The structure of the obtained products were determined by IR, 1H NMR, 13C NMR and HMBC spectra. The results show that: i) On heating with aromatic aldehyde, the amino group of QNH2 was converted into OH‐phenol group; ii) QNH2 was readily transformed into diazonium salt QN2+Cl‐, which was reduced by Na2SO3/HCl to give a new hydrazinoquinoline QNHNH2; iii) In weak acidic medium QN2+Cl‐ was lost HCl to form a new diazo compound QN2. A simple and effective method for synthesis of the diazoquinoline compound QN2 was proposed.
Loại bỏ màu thuốc nhuộm reactive yellow 160 bằng kỹ thuật fenton dị thể sử dụng bùn đỏ biến tính
Authors: Anh Đặng Thế , Anh Nguyễn Thị Vân , Trung Đỗ Quang , Đức Đào Sỹ 
Published: March 2018

AbstractIn this paper, iron‐modified red mud was used as a heterogeneous Fenton catalyst for the degradation of Reactive Yellow 160 (RY 160). Raw and modified red mud samples were characterized by scanning electron scopy (SEM), Energy dispersive X‐ray spectroscopy (EDX), and BET analysis. The experimental results indicated that under the optimum conditons for the degradation of RY 160 including catalyst dose of 1.5 g/L, hydrogen peroxide dose of 1.96 mM, and pH 2, the decolorization efficiency of 99.2 % was achieved within 60 min. Kinetics studies showed that the decolorization of RY 160 on iron‐modified red mud catalyst follows a pseudo‐first order reaction with the reaction rate constant of 0.0383 min‐1 (R2 = 0.9939), Activation energy of 31.9 kJ/mol, R2 = 0.9804.
Tổng hợp vật liệu CeO2 kích thước nanomet trên nền SiO2 và nghiên cứu khả năng quang xúc tác của chúng
Authors: Chi Nguyễn Thị Hà , Dũng Đoàn Trung , Chức Phạm Ngọc , Lịm Dương Thị , Nhiệm Đào Ngọc 
Published: March 2018

AbstractThe nanomaterials CeO2 with average size of 50 nm on the SiO2 base which performed very high photocatalytic properties were successfully synthesized by the sol‐gel combustion method. Starting with freshly precursor, the prepared sample was studied the morphology and characterized by X‐ray diffraction, field‐emission scanning electron microscopy and Brunauer‐Emmetl‐Teller method at 77 K. The nanocomposite material contained only 10 % and 20 % of CeO2, but it still presented a significant efficiency on methyl orange degradation under visible light. The CeSi20 which includes 20 % of CeO2 nanoparticles revealed that the photocatalytic capacity with over 97 % of methyl orange was removed after 60 min of the irradiation.
Effects of Different Extraction Methods and Solvents on the Phenolic Composition and Antioxidant Activity of Silybum Marianum Leaves Extracts
Authors: Benchaachoua Abbassia , Bessam Hassiba Mahdjoub , Saidi Imene 
Published: March 2018

Objective: The objectives of this study were essentially to evaluate the best technique for extracting phenolic compounds from Silybum marianum leaves.
Subjects and Methods: Two extraction methods (maceration and decoction), using four extraction solvents. The efficiency of the extraction methods was estimated by quantifying the total polyphenol contents by the Folin -Ciocalteu method and by determining the antioxidant power of the various extracts by the ability to trap the free radical DPPH °, and the influence of these parameters on the antioxidant activity.
Results: The results showed that the extracts of the leaves by maceration have contained the highest percentage yield (24.68%); the highest content in the aqueous -methanol polyphenols extract (18.75 ± 0.55 mg GAE / g DW ) against the decoction is more effective for the extraction of flavonoids and condensed tannins. The highest content of flavonoids had been recorded for the aqueous- ethanolic extract (5.08 ± 0.57 CE mg / g DW). The water had the highest content of condensed tannin (03.86 ± 0.22 TAE / g DW). On the other hand, the aqueous -ethanolic and aqueous -methanol extract of the leaves obtained by maceration have the best antioxidant capacity (73.84 ± 5.90 EAG / g DW and 73.64 ± 5.93 mg EAG / g DW respectively) and the aqueous extract of the leaves by decoction had a better antiradical power (48.64 μg / ml).
Conclusion: The extraction of phenolic compounds from Silybum marianum leaves was strongly influenced by the type of solvent and the extraction method. In addition, it is very difficult to choose an appropriate extraction solvent for all plant samples.
“Wer jetzt kein Haus hat, baut sich keines mehr”. Notes on Bruce O’Neill’s "The Space of Boredom"
Authors: Tudorie George 
Published: March 2018

Bruce O’Neill describes homeless men and women in Bucharest who could not navigate the downward spiral which followed the meltdown of the state-run economy after 1989. Deprived of the culturally treasured anchors of work, home, and family, and unable to participate in anything recognizably meaningful, these individuals are forced into a position of malignant contemplation, even when busy surviving. It is an experience of paralyzed restlessness which resonates with the ruins they zigzag through.
The Space of Boredom captures this landscape convincingly, and in elegant prose. The book moves effortlessly from the discussion of scholarly works in a number of fields, to observation of sometimes cinematic quality. It is well argued, abundantly researched, and clear about its theoretical assumptions. If some questions remain to be answered, at least to this reader, this may be an artifact of background. Assumptions, including important ones about the nature of affects, and about boredom itself, may not be shared. Some questions of this kind will be raised in the following.
Indigenous plants for informal greywater treatment and reuse by some households in Ghana
Authors: Dwumfour-Asare Bismark , Nyarko Kwabena B. , Awuah Esi , Essandoh Helen M. K. , Gyan Bernard A. , Ofori-Addo Hilda 
Published: March 2018

Abstract
Poor greywater management is one of Ghana's sanitation nightmares due to longstanding neglect. This study looks at local practices of informal phytoremediation, and identifies commonly used plants and benefits. Our study collected data from 451 surveyed houses in nine communities within three regions, using structured questionnaires and extensive field observations. Greywater (kitchen, bathroom and laundry) is mainly disposed of into the open (46–66%), with few (4–24%) using septic tanks and soakaway systems. The majority of respondents (84%) perceived plants as agents of treatment and most could list 1–2 beneficial functions of the plants. A total of 1,259 plant groups were identified which belonged to 36 different plant species. The top five indigenous plants used are sugarcane, banana/plantain, taro, sweet/wild basil, and dandelion. The major plant benefits identified were food (84% of respondents) and medicine (62% of respondents). Statistically, no association was identified between the numbers of plants grown and their perceived plant roles (χ2 = 6.022, p = 0.304), with the exception of an association between plant numbers and benefits (χ2 = 161.94, p &lt; 0.001). There is demand for improving local practices of using plants in greywater treatment and reuse, since native plants also come with other benefits.
Modelling, Simulation and Fuzzy Self-Tuning Control of D-STATCOM in a Single Machine Infinite Bus Power System
Authors: Habib Chaib , Tayeb Allaoui , Mustapha Brahami , Denai Mouloud 
Published: March 2018

Background:
In recent years, demand for electricity has increased considerably, while the
expansion of generation and transmission has been very slow due to limited investment in resources and
environmental restrictions.

Methods:
As a result, the power system becomes vulnerable to disturbances and instability. FACTS
(Flexible AC Transmission Systems) technology has now been accepted as a potential solution to this
problem. This paper deals with the modelling, simulation and fuzzy self-tuning control of a DSTATCOM
to enhance the stability and improve the critical fault clearing time (CCT) in a single
machine infinite bus (SMIB). A detailed modelling of the D-STATCOM and comprehensive derivation
of the fuzzy logic self-tuning control is presented.

Results:
The dynamic performance of the power system with the proposed control scheme is validated
through in a simulation study carried out under Matlab/Simulink and SimPowerSystems toolbox.

Conclusion:
The results demonstrate a significant enhancement of the power system stability under the
simulated fault conditions considered.
مهارة الكلام وإجراءة تعليمها
Authors: Hidayat Nandang Sarip 
Published: March 2018

أن مهارة الكلام إحدى المهارات اللغوية العربية الأربعة، وعلى إجادة اللغة العربية أن يتأكد من وجود هذه المهارة، ولقد يكون من الأمور المساعدة هنا تقديم تصور ل من هذه المهارة اللغوية العربية التفصيلية التي تنضوي تحت المهارة. ويحتاج التعامل الفعالة والمحاولة الابتكارة بين المعلم والمتعلم على إجرءات تعليمها لحصيلة تلك المهارة اللغوية العربية ويفهم الطلاب اللغة العربية فهما كاملا
BIOSORPSI ION LOGAM Cd2+ MENGGUNAKAN BATANG KECOMBRANG (Etlingeraelatior) SEBAGAISUMBER BELAJAR BERBASIS POWER POINT
Authors: Adinata Warsono , Lazulva Lazulva 
Published: March 2018

This research aimed at seeing the appropriateness of the instructional media Power Point based. The early stage conducted was seeing the basic competence that needed the instructional media adapted to the syllabus of Vocational High School of Pharmacy Pekanbaru. The material was Adsorption material that was on the basic competence of 1.2, it was about understanding the adsorption process. After adjusting the material, applied research of biosorption of Cd2+ metal ion using Kecombrangtrunk on various pH 2, 3, 4, 5, and 6 that was analyzed by AAS was conducted. The optimum pH obtained was on pH 5 with 80.73% adsorption. The next step was preparing the instructional media Power Point based that was assessed by material and media experts. The result of material expert assessment showed their strong agreements and there was no revision with 82% percentage. The next step was testing 4 Chemistry teachers at Vocational High School of Pharmacy Pekanbaru. It showed the agreement and no revision with 79.75% percentage. It meant that the chemistry instructional media Power Point based could be a learning resource.Keywords: Learning Resources, Instructional Media Power Point Based, Kecombrang,Cadmium, Adsorption.
DESAIN BAHAN AJAR BERUPA HANDOUT BERBASIS INKUIRI TERBIMBING PADA PEMBELAJARAN KIMIA MATERI HIDROKARBON
Authors: Wati Lina , Fatisa Yuni 
Published: March 2018

AbstractThis research was instigated by students’ difficulty at the tenth grade of State Senior High School 10 Pekanbaru in comprehending chemistry concept of Hydrocarbon Lesson that made them unable to achieve optimal learning achievement, thus a teaching lesson was required to guide them to comprehend the concept. It was done by designing a teaching lesson in the form of handout Guided Inquiry based. This research aimed at knowing the validity and practicality levels of handout Guided Inquiry based that was valid and practical. It was a Research and Development (R&D) with 4D (four-D) model, modified by doing limited trials and removing disseminating step. It was administered at State Senior High School 10 Pekanbaru. The primary data were collected in this research through questionnaire. Validity and practicality test questionnaires were the instruments of collecting the data. The data obtained were analyzed by using Descriptive qualitative and quantitative analysis techniques. The handout produced was tested, its validity level was 89.94% (very valid) and its practicality level was 76.50% (practical). Based on these results, it could be identified that the handout tested was appropriate and practical to be an alternative teaching lesson for teachers in a school. Keywords: Handout, Guided Inquiry, Hydrocarbon
PELAKSANAAN PROGRAM SEKOLAH BERWAWASAN GENDER DI PROPINSI RIAU
Authors: Roza Yenita 
Published: March 2018

Gender mainstreaming being the big issues lately included in Indonesia. To improve the gender equality access for education Indonesian government been launching the schools program name “ Sekolah Berwawasan Gender”. The aim of this study is to explore the schools’ achievement on that government program in The Province of Riau. Giving orientation program, schools were required to design and implement their specific program. Schools also get funded to accelerate their program. The assessment were done based on 10 standard on indicator of the program implementation. Data were collected through questionnaire and direct observation to the schools. This paper discuss finding based on the 10 standard that grouped into schools level and region of the schools. It was found that the highest achievement is reached for standard 3 (85%) that deal with learning outcome, the lowest achievement is given to the standard 5 (56%) about schools’ facilities. This finding will be used as recommendation for the schools and government to improve their program design and implementation of gender equality program.
The “spirit” of the old communion chants
Authors: Sîrbu Adrian 
Published: March 2018

Abstract
Byzantine music is the chanted prayer of the Orthodox Church left to us as a spiritual legacy by the holy masters of hymnography and hymnology ever since the early centuries. This music serves a precise purpose, i.e. to enhance the mood of prayer and to lift man closer to God. The Holy Liturgy, the mystical centre and the reference point of a man’s entire existence, represents man’s private meeting and communion with Christ, and the moment of this meeting is steeped in an atmosphere of meditation and inwardness created by a series of ample, slow, and vocalization-rich chants, called koinonika. It is a moment of ultimate inner appeasement and preparation. Early composers managed to capture this meditation effect in their koinonika, both through their compositional techniques and, especially, through an inner state of grace. However, in the 19th century, two phenomena became apparent: on the one hand, some of the new composers no longer succeeded in attaining the same ethos as the old masters, and, on the other hand (particularly from Ioan Popescu-Pasărea on), the music tastes of the time caused these ample chants to be replaced with simpler melodies, which, often, were even harmonized. This study has a threefold aim: first, it reasserts the fundamental role played by the koinonikon in the Holy Liturgy, by arguments that underline the ancientness of this practice as well as its survival in other Orthodox areas (such as Mount Athos and Greece). Second, the paper signals the publication, next year, of the first Romanian collection of koinonika signed by Byzantine and post-Byzantine composers (13th-19th centuries). Third, our study aims to show that these ancient chants have a special ethos, representing melodic as well as aesthetic archetypes and, par excellence, the true Classicism of Byzantine melos.
Archdeacon Sebastian Barbu-Bucur PhD – Researcher of the Byzantine Musical Tradition across the Romanian Territory
Authors: Chircev Elena 
Published: March 2018

Abstract
Professor Archdeacon Sebastian Babu-Bucur PhD is one of the most prominent representatives of Romanian Byzantology with a tireless activity spreading throughout different fields – research, psalmic musical creation, teaching, performing. Our study focuses briefly on several of the researcher’s achievements, some of his main concerns having been the Romanianisation process of the church chant in the 18th century and the manuscripts elaborated by Romanians. We highlighted the merits of the Byzantinist musicologist who contributed to the discovery of most of the Romanian manuscript no. 61 in the Romanian Academy Library, who tracked down and catalogued over 250 Romanian manuscripts to be found in the libraries from Mount Athos, who demonstrated through documenta and transcripta editions the significance of the activity of various Romanian psalm readers whose contribution to the translation of chants in Romanian had been, up to that moment, almost unknown. Archdeacon Sebastian Babu-Bucur’s tireless work as a researcher of Byzantine music contributes to a better knowledge and understanding of the evolution of this type of music in the 18th and the 19th century and leads the way towards new investigations in the years to come.
Constantin Catrina – a life in the service of the Romanian music
Authors: Dănilă Irina Zamfira 
Published: March 2018

AbstractA complex personality, with multifarious concerns in research as well as in composition, Constantin Catrina (1933-2013) was active as a folklorist, historian, musicologist, Byzantinologist, composer; he dedicated his entire life to the research of the Romanian music, viewed in all its manifold manifestations: folklore music, Orthodox church music of the Byzantine tradition as well as lay music. His investigations were directed mainly towards the area of Brasov and its surroundings. He diligently studied documents about the musical life of the city in archives and libraries, discovered interesting information about the cultural personalities of this old Transylvanian city, with rich cultural traditions and diverse influences. He also managed to reveal their connections with other cultural centres in Romania. He was a pioneer in the field of Byzantinology, filling a space left empty in the history of Byzantine music by emphasizing the activity of an important centre of church music teaching and education in central Transylvania – the School of “Saint Nicholas” Church in Scheii Brasovului between the 15th and 20th centuries. In terms of folklore research, he investigated the areas related to Brasov and collected a rich ethnographic, literary and musical material which he published in reputable collections. In all three lines of activity, he wrote and published an impressive number of articles in the local and specialised national press, thus proving to have a genuine passion for research and for the dissemination of its results to the specialists and the general public.
Interpretative and Compositional Connotations from a Musicological Perspective
Authors: Nedelcuţ Nelida , Ghişa Lucian 
Published: March 2018

Abstract
Musicology, viewed as a general science regarding all the defining elements of music, can approach compositions using hermeneutical methods, both through a critical view on the interpretation, the stage performance of the creative act, and through the subsequent musicological writings, becoming a “meta-interpretation” that requires a thorough exegesis. The couplet hermeneutics-interpretation together with that of compositional concept versus stage production are the ones underlying our research, while hermeneutics is the very art of performing that penetrates the most cryptic elements present in the musical act, viewed from the perspective of the triad creation-interpretation-reception. In an attempt to emphasize the ways in which the composer suggests to the performer certain indications for stage performance, through writing, agogics, dynamics and special sound effects, we intend to study, from the standpoint of the musicologist, the piece 5 tablouri cu umbre(le)1 by Constantin Rîpă. Built on a structure of five tableaux, the work comprises fifteen songs on poems by five contemporary Cluj poets and outlines a new concept of musical performance, which aims to experiment in composing music with the idea of the primordial nature of the poetic text, which is associated with elements of motion and gestures of the interpreters and is based on an arbitrary compositional concept, a defining technique that can be found in a great part of the choral creation of this composer.
The Subject – A Key Element of the Fugue Form during the 20th Century
Authors: Vlahopol Gabriela 
Published: March 2018

Abstract
The great stylistic epochs of the past mostly had syntaxes and specific forms, escaping in the context of the application of polyphonic syntax to the tonal system. The twentieth century, characterized by a continuous mobility and search in the field of the musical language, does not intend to create new musical forms but takes preexisting patterns, which adapt to the creative contexts specific to the composers. Thus, despite the blurring of some of the fundamental elements, other factors of configuration and construction were maintained and amplified, as well as the particular phenomenon, the most significant phenomenon being the development of the thematic principle, which will have its particular manifestations in the fugue form, the diversity of its interpretations bearing the mark of some new directions.
Performing practice - comparative analysis and conclusions
Authors: Coroiu Petruţa-Maria , Belibou Alexandra 
Published: March 2018

Abstract
Musical notation and its relationship with the concept of performance is very complex, depending on the context. Our paper discusses some important ideas about performance, referring to ascpects specific to great conductors such as S. Celibidache and W. Furtwängler. We begin by outlining the basic concepts behind their interpretations before going into more detail with specific examples.