bluuebunny/crossref_metadata_2025_split huggingface dataset:
Penentuan Kualitas Air Muara Sungai Batang Arau Melalui Pengujian Total Dissolved Solid (TDS), Total Suspended Solid (TSS), dan Kandungan Logam Berat
Authors: Ofiyen Charlie , Puryanti Dwi 
Published: July 2022

Penelitian ini bertujuan untuk menentukan konsentrasi logam berat, suhu, pH, konduktivitas listrik, total padatan terlarut (TDS) dan total padatan tersuspensi (TSS) pada sampel air muara Sungai Batang Arau. Nilai konsentrasi logam berat diukur menggunakan alat inductively coupled plasma (ICP), suhu diukur menggunakan termometer, pH diukur menggunakan pH meter, konduktivitas listrik diukur menggunakan konduktiviti meter, TDS dan TSS ditentukan menggunakan metode gravimerti. Dari hasil penelitian diperoleh nilai rata-rata rata-rata suhu sebesar 28,52 â„ƒ. Nilai rata-rata pH sebesar 6,76. Nilai rata-rata konduktivitas listrik sebesar 176,43 ÂµS/cm. Nilai rata-rata TDS sebesar 1040,5 ppm. Berdasarkan PP. No. 82 Tahun 2001 nilai rata-rata TDS di muara Sungai batang Arau telah melebihi standar baku mutu air kelas II yaitu sebesar 1000 mg/l. Nilai rata-rata TSS sebesar 204,9 ppm, nilai rata-rata TSS juga telah melebihi baku mutu PP. No. 82 Tahun 2001 kelas II yaitu sebesar 50 mg/l. Nilai kosentrasi logam berat Cd, Cu, dan Hg di muara Sungai Batang Arau telah melebihi baku mutu yang ditetapkan PP. No. 82 Tahun 2001. Dari hasil yang didapatkan dapat disimpulkan bahwa kualitas air di muara Batang Arau telah terjadi pencemaran.Â This study aims to determine the concentration of heavy metals, temperature, pH, electrical conductivity, totally dissolved solids (TDS) and totally suspended solids (TSS) in the estuary samples of the Batang Arau River. The value of heavy metal concentration was measured using an inductively coupled plasma (ICP), temperature was measured using a thermometer, pH was measured using a pH meter, electrical conductivity was measured using a conductivity meter, TDS and TSS were determined using the gravimerity method. From the results of the study, the average value of the temperature was 28.52. The average value of pH is 6.76. The average value of electrical conductivity is 176.43 S/cm. The average value of TDS is 1040.5 ppm. Based on PP. No. 82 of 2001 the average TDS value at the estuary of the Batang Arau River has exceeded the class II water quality standard, which is 1000 mg/l. The average TSS value is 204.9 ppm, the TSS average value has also exceeded the PP quality standard. No. 82 of 2001 class II that is equal to 50 mg/l. The concentration values of Cd, Cu, and Hg heavy metals in the Batang Arau River estuary have exceeded the quality standards set by PP. No. 82 of 2001. From the results obtained, it can be concluded that the water quality in the Batang Arau estuary has been polluted.
Penentuan Konsentrasi Radionuklida 137Cs dalam Susu Sapi di Nagari Sungai Kamuyang Sumatera Barat
Authors: Asma Ul Husna Indah , Milvita Dian , Kusdiana Kusdiana 
Published: July 2022

Telah dilakukan penentuan konsentrasi radionuklida 137Cs pada susu sapi di Nagari Sungai Kamuyang, Sumatera Barat. Penelitian ini bertujuan untuk menentukan konsentrasi radionuklida buatan 137Cs pada susu sapi yang ditinjau berdasarkan PERMENKES RI No. 1031 tahun 2011, serta menentukanÂ konsentrasi radionuklida buatan 137Cs pada rumput dan tanah yang ditinjau berdasarkan PERKA BAPETEN No. 16 tahun 2012. Sampel yang diukur terdiri dari sampel susu sapi sebanyak 3 liter, rumput sebanyak 2 kg, dan tanah pada kedalaman 0-15 cm sebanyak 2 kg. Penelitian diawali dengan preparasi sampel, kemudian diukur selama 17 jam menggunakan spektrometer gamma yang sudah dikalibrasi. Hasil pengukuran menunjukkan bahwa radionuklida 137Cs hanya terdeteksi pada sampel tanah dengan konsentrasi 0,42 Â± 0,19 Bq/kg. Konsentrasi radionuklida 137Cs pada sampel tanah dan rumput berada di bawah batas maksimum yang ditetapkan PERKA BAPETEN No. 16 tahun 2012 sedangkan jika ditinjau berdasarkan PERMENKES RI No. 1031 tahun 2011 maka hasil pengukuran konsentrasi radionuklida 137Cs dalam susu sapi di Nagari Sungai Kamuyang berada di bawah batas maksimum konsentrasi 137Cs.
Identifikasi Struktur Bawah Permukaan Gunung Tandikat Menggunakan Metode Gravitasi Berdasarkan Data Satelit
Authors: Trimulyati Wildah , Putra Ardian 
Published: July 2022

Pada penelitian ini dilakukan identifikasi struktur bawah permukaan sekitar Gunung Tandikat dengan metode gravitasi. Penelitian ini bertujuan untuk mengidentifikasi jenis batuan dan patahan bawah permukaan dengan anomali bouguer lengkap. Data yang digunakan merupakan data Free Anomaly Air (FAA) dan topografi dari web TOPEX dengan total titik pengamatan berjumlah 49 titik. Data FAA dan Topografi diolah menggunakan software global mapper, oasis montaj dan Ms. Excel. Hasil dari slicing 2D daerah penelitian terdiri dari batuan dasar dan akibat aktivitas vulkanik.Â Batuan tesebut terdiri dari batuan andesit Kaldera Maninjau dengan densitas 2,4 g/cm3, tuff lapili dengan densitas 2,12 g/cm3, batuan lavas atau breksi gunung api dengan densitas 2,9 g/cm3, batuan Sekis dengan densitas 2,64 g/cm3, batuan Limestone dengan densitas 1,93 g/cm3. Dugaan keberadaan panas bumi berada pada sekitar titik A, terdapat batuan breksi gunug api dengan jarak wisata air panas 3,5 km. Analisis derivative dilakukan untuk menentukan jenis dan lokasi patahan pada tiga lintasan. Hasil lintasan digitasi pada First Horizontal Derivative dan Second Vertical Derivative didapat empat patahan, dengan tiga patahan normal dan sisanya merupakan patahan naik.
Anatomy of the optic radiations from the white matter fiber dissection perspective: A literature review applied to practical anatomical dissection
Authors: Rodrigues Eduardo Mello , Isolan Gustavo Rassier , Becker Lia Grub , Dini Leandro Infantini , Vaz Marco Antônio Schlindwein , Frigeri Thomas More 
Published: July 2022

Background:
Knowledge of the anatomical course of the optic radiations and its relationship to medial temporal lobe structures is of great relevance in preoperative planning for surgery involving the temporal lobe to prevent damage that may result in postsurgical visual field deficits.

Methods:
In this anatomical study, we reviewed the literature on this topic and applied the information to practical anatomical dissection. The three-dimensional relationship between the course of the optic radiations and structures accessed in the main microneurosurgical approaches to the medial temporal lobe was examined by applying Klingler’s white matter fiber dissection technique to five formalin-fixed human brains. The dissections were performed with an operating microscope at magnifications of ×3–×40. High-resolution images were acquired during dissection for identification of the anatomical structures, focusing on the characterization of the course of the optic radiations in relation to medial temporal lobe structures.

Results:
In all five dissected brains, we could expose and clearly define the relationship between the optic radiations and medial temporal lobe structures, improving our understanding of these complex structures.

Conclusion:
The knowledge gained by studying these relationships will help neurosurgeons to develop risk-adjusted approaches to prevent damage to the optic radiations in the medial temporal region, which may result in a disabling visual field deficit.
Spheno-orbital meningiomas: Is orbit reconstruction mandatory? Long-term outcomes and exophthalmos improvement
Authors: Santos Alexandra Gomes dos , Paiva Wellingson Silva , da Roz Leila Maria , Santo Marcelo Prudente do Espirito , Teixeira Manoel Jacobsen , Figueiredo Eberval G. , da Silva Vinicius Trindade Gomes 
Published: July 2022

Background:
Meningiomas correspond to one-third of all primary central nervous system tumors. Approximately 9% of them are spheno-orbital meningiomas (SOMs), presenting significant clinical symptoms as visual impairment and orbital esthetics. This article aims to evaluate exophthalmos’ improvement in a surgical series without orbital reconstruction.

Methods:
We consecutively included all patients diagnosed with SOM, admitted to a single institution for 10 years. Surgical resection was the standard of care, associated or not with adjuvant radiation therapy. The radiological investigation included preoperative and postoperative head CT or MRI. We quantified proptosis through imaging.

Results:
Forty patients composed this series, 87.5% were female. Proptosis was the most common presentation (90%), followed by decreased visual acuity (65%), motility deficit (20%), and headache (20%). Gross total resection was achieved in 65% of the procedures. In late outcomes, 78% of the patients maintained or improved visual acuity and 85% maintained or improved headache. Proptosis significantly improved after surgery and along with the follow-up (P < 0.001). Ten patients were submitted to adjuvant RT, six of them after a subtotal resection. All patients of this subgroup had proptosis. It was observed a higher frequency of worse in visual acuity in patients submitted to RT (71% vs. 28%, P = 0.038).

Conclusion:
Resection of SOM was sufficient to stop the evolution of visual deficit and allowed the improvement of proptosis. Orbital reconstruction does not seem to be an essential step in reducing enophthalmos.
Repeat laser interstitial thermal therapy for recurrent primary and metastatic intracranial tumors
Authors: Muir Matthew , Traylor Jeffrey I. , Gadot Ron , Patel Rajan , Prabhu Sujit S. 
Published: July 2022

Background:
Repeat craniotomy in patients with primary and metastatic brain tumors carries significant morbidity and can delay adjuvant treatments. Repeat laser interstitial thermal therapy (LITT) for recurrent disease has been described and could benefit patients with limited cytoreductive options. We aim to describe the indications, safety, and efficacy of repeat LITT for recurrent primary and metastatic intracranial tumors.

Methods:
Patients undergoing repeat ablations for the same lesion were included in the study. We retrospectively analyzed 13 patients treated with 29 total LITT ablations.

Results:
Eleven patients were treated for glioblastoma (GBM), while two had brain metastases. Eleven patients had LITT performed only 2 times, while three patients underwent three total iterations of LITT for disease recurrence. Median length of stay after the 1st ablation was 2 days, while the median length of stay after the 2nd ablation was 1 day. The median time to resuming adjuvant treatments after the 1st LITT was 11 days. The median time to resuming adjuvant treatments after the 2nd LITT was 28 days. Four patients after the 1st and 2nd LITT sustained deficits persisting through 30-day follow-up. The median progression-free survival among the GBM patients from the first ablation was 6.0 months, 3.2 months from the 2nd ablation, and 2.1 months from the 3rd ablation.

Conclusion:
Recurrent tumors, especially GBM, can be safely treated using repeat LITT when surgery cannot be effectively performed. Our results indicate that patients tolerate the procedure well and have a meaningful survival given the salvage nature of the procedure.
Teaching Writing Recount Text by Using Powtoon Video
Authors: Ningsih Nuri Ati 
Published: July 2022

Powtoon. video and finding the advantages of using it. This research was a qualitative descriptive method. It was done in class IX of SMPN 6 Madiun. The sample of this research is class IX H. The data were collected by doing observation, interview, and documentation. Then, it was analyzed through three techniques. They involve data reduction. Displaying data, conclusion and verification. The result of reserach shows that using Powtoon. Powtoon video in teaching writing recount text done in three-phase technique. It involves pre activities, main activities and post activities. The process of writing done based on Linses’ theory. Those are pre writing, writing, revising, editing and publishing. Powtoon video was played twice. First, it was played in pre activities to stimulate the students' understanding of the material. Second, it was used in main activities specifically in revising step to make sure the students about their works. The advantages of using Powtoon video in writing class are; (1) creating a joyful class; (2) raising the students’ motivation and enthusiasm in writing; (3) realize the students to be independent learners; and (4) develop the teachers’ creativity.
Syntactic Word Order between Indonesian and English: Building a Concept through Contrastive Analysis in Academic Writing
Authors: Azami Mochamad Imron , Sholihah Fitri Awaliyatush 
Published: July 2022

<span lang="EN-US">This study focuses more on syntactic word order through identify the language structure of simple sentence both Indonesian and English in argumentative essay made by English education department students at University of Islam Malang and analyze it by contrastive analysis (CA). The significance of this research is to cover the students’ difficulties in academic writing process by using contrastive analysis and to identify the highlight point of the structure differences between Bahasa Indonesia (L1) and English (L2). The researcher used qualitative method by collecting 10 students’ argumentative essay both in Indonesia and in English. The results show that the common pattern occurs in the students’ argumentative essay is SVO and the other patterns are S-V(Aux)-O, NP-S-V-O, Conj-S-V-O, S-V-O-V, S-S-V-O and Conj-NP-S-V-O</span><span lang="EN-US">. W</span><span lang="EN-US">hile in Indonesian are <em>Subjek-Predikat</em> (SV), <em>Subjek-Predikat-Objek</em> (SVO), <em>Subjek-Predikat-Pelengkap</em> (SVC), <em>Subjek-Predikat-Objek-Pelengkap</em> (SVOC), <em>Subjek-Predikat-Objek-Keterangan</em> (SVOA (Adverb)), <em>Subjek-Predikat-Keterangan</em> (SVA), <em>Keterangan-Predikat-Subjek</em>(AVS), and <em>Subjek-Predikat-Keterangan-Pelengkap</em> (SVAC). Students tended to write the argumentative essay in English inapropiately to the theory of simple sentence structure. While in Indonesian arguementative essay, they wrote properly based on the possible pattern of simple sentence in Indonesian.</span>
ELECTRONIC CHARACTERISTICS OF THIOPHENES
Authors: Курочкин Георгий Александрович , Русакова Наталья Петровна , Туровцев Владимир Владимирович 
Published: July 2022

Методом B3LYP получено распределение электронной плотности тиофена, двух димеров тиофена с отличающимся положением атомов серы в кольцах и тримера. Проведено сравнение зарядов, относительной энергии и объемов групп с использованием «квантовой теории атомов в молекулах» (QTAIM). Рассмотрено изменение интегральных электронных характеристик углерода и метиновой группы в зависимости от положения S в конденсированных циклах и расстояния между атомами S.
The distribution of the electron density of thiophene, two dimers with different positions of sulfur atoms in the rings, and a trimer by the B3LYP method was obtained. The charges, relative energy, and volumes of groups are compared using the "quantum theory of atoms in molecules" (QTAIM). The change in the integral electronic characteristics of carbon and the methine group, which depends on the position and distance between sulfur atoms in thiophene rings, is considered.
THE USE OF ASH AND SLAG WASTE IN BUILDING COMPOSITIONS
Authors: Чалов Кирилл Вячеславович , Луговой Юрий Владимирович , Сульман Михаил Геннадьевич , Косивцов Юрий Юрьевич 
Published: July 2022

В данной работе рассмотрена возможность использования золошлаковых отходов, образующихся от сжигания угля на теплоэлектростанциях, в качестве компонента строительных смесей. Представлен способ выделения из золошлаков следующих компонентов: угольный, магнитный и алюмосиликатный концентраты. Алюмосиликатный концентрат использовался в процессе изготовления минеральных вяжущих композиций и премиксов. Полученные образцы минеральных вяжущих композиций на основе гипса исследовались методами термогравиметрии и дифференциальной сканирующей калориметрии. Добавление алюмосиликатного концентрата улучшает эксплуатационные характеристики материала. В готовой композиции снижается водопоглощение и содержание равновесной влаги, что связано с изменением пористости и структуры материала.
This paper considers the possibility of using ash and slag waste generated from coal combustion at thermal power plants as a component of building mixtures. A method for separating the following components from ash and slag is presented: coal, magnetic and aluminosilicate concentrates. Aluminosilicate concentrate was used in the process of manufacturing mineral binders and premixes. The obtained samples of mineral binder compositions based on gypsum were studied by thermogravimetry and differential scanning calorimetry. The addition of an aluminosilicate concentrate improves the performance of the material. In the finished composition, water absorption and the content of equilibrium moisture are reduced, which is associated with a change in the porosity and structure of the material.
THE ROLE OF PHOSPHOINOSITIDES IN THE REGULATION OF PROLIFERATIVE PROCESSES IN THE ORGANISM
Authors: Дамиров Михаил Михайлович , Слюсарь Николай Николаевич 
Published: July 2022

Представлены современные данные о структуре клеточных мембран и роли основных компонентов их - фосфоинозитидов (ФИН) в регуляции основных функций клеток. Основным барьером для потока информации является плазматическая мембрана клетки, в которой происходят механизмы, преобразующие внешние сигналы во внутриклеточные. Передача сигнала с мембранного рецептора на ядро происходит с помощью системы циклических нуклеотидов (цАМФ, цГМФ), кальция, инозитолтрифосфатов и диацилглицеролов. Создана унитарная решетчатая модель трансмембранного переноса сигналов. Важная роль ФИН в жизнедеятельности клеток связана с их непосредственным участием в регуляторной, транспортной, энергетической и пластической функциях биологических мембран.
Modern data on the structure of cell membranes and the role of their main components, phosphoinositides (PIN), in the regulation of basic cell functions are presented. The main barrier to the flow of information is the plasma membrane of the cell, in which there are mechanisms that convert external signals into intracellular ones. Signal transmission from the membrane receptor to the nucleus occurs with the help of a system of cyclic nucleotides (cAMP, cGMP), calcium, inositol triphosphates, and diacylglycerols. A unitary lattice model of transmembranal signal transduction has been created. The important role of FIN in the vital activity of cells is associated with their direct participation in the regulatory, transport, energy, and plastic functions of biological membranes
HETEROGENEOUS BIOCATALYSTS BASED ON PEROXIDASE AND GLUCOSE OXIDASE
Authors: Гребенникова Ольга Валентиновна 
Published: July 2022

В работе описывается способ получения биферментых систем на основе глюкозооксидазы и пероксидазы корня хрена. Выбранные ферменты были ковалентно иммобилизованы на магнитные наночастиц, синтезированные методом со-осаждения, и неорганический носитель SiO. Образцы носителей были предварительно модифицированы и активированы. Полученные биокатализаторы тестировались в каскадной реакции окисления D-глюкозы и 2,2'-азино-бис-(3-этилбензтиозолин-6сульфокислоты) диаммониевой соли. Подобраны оптимальные условия работы биферментынх систем (температура 45 С, рН 6.0).
The paper describes a method for obtaining bienzymatic systems based on glucose oxidase and horseradish root peroxidase. The selected enzymes were covalently immobilized on magnetic nanoparticles synthesized by the coprecipitation method and an inorganic SiO support. The carrier samples were pre-modified and activated. The resulting biocatalysts were tested in a cascade oxidation reaction of D-glucose and 2,2'-azino-bis-(3ethylbenzthiozolin-6-sulfonic acid) diammonium salt. Optimum conditions for the operation of bienzymatic systems (temperature 45 C, pH 6.0) were selected.
STUDY OF INFLUENCE OF VARIOUS FACTORS ON DIMENSIONS AND STABILITY OF GOLD NANOPARTICLES
Authors: Тихонов Борис Борисович , Манаенков Олег Викторович , Сидоров Александр Иванович , Сульман Михаил Геннадьевич 
Published: July 2022

В статье синтезированы стабильные наночастицы золота восстановлением золотохлористоводородной кислоты (HAuCl) цитратом натрия (методом Туркевича). Получены спектры образцов наночастиц в области 400-800 нм, подтверждено наличие пиков поверхностного плазмонного резонанса. Определены размеры наночастиц и дзета-потенциал методом динамического рассеяния света. Исследована динамика изменения свойств наночастиц при хранении в течение 10 дней. Исследовано влияние значения рН, присутствия хитозана и глутатиона на свойства наночастиц.
The article synthesizes stable gold nanoparticles by reducing hydrochloric acid (HAuCl) with sodium citrate (Turkevich's method). Spectra of nanoparticle samples in the region of 400-800 nm were obtained, the presence of surface plasmon resonance peaks was confirmed. Nanoparticle sizes and zeta potential are determined by dynamic light scattering method. Changes in nanoparticle properties during storage for 10 days were investigated. The effect of the pH value, the presence of chitosan and glutathione on the properties of nanoparticles was investigated.
THEORETICAL OPTIMIZATION OF REGULAR PARAMETERS OF A CATALYTIC REACTION WITH A VARIABLE REACTION VOLUME
Authors: Антипина Евгения Викторовна , Мустафина Светлана Анатольевна , Антипин Андрей Федорович 
Published: July 2022

Статья посвящена разработке методов поиска оптимального температурного режима каталитической реакции с переменным реакционным объемом. В работе в общем виде сформулирована задача теоретической оптимизации каталитической реакции, в которой управляющим параметром является температура реакции, фазовыми переменными - значения концентраций веществ и относительное изменение числа молей реакционной среды. Для поиска численного решения поставленной задачи оптимального управления с ограничением на управляющий параметр предложен алгоритм, основанный на методе дифференциальной эволюции. Работа алгоритма апробирована на каталитической реакции синтеза бензилиденбензиламина. Описана математическая модель реакции с учетом изменения реакционного объема в ходе протекания реакции, на основе которой сформулирована задача поиска оптимального температурного режима с целью получения максимальной концентрации продукта реакции - бензилиденбензиламина. Получены оптимальный температурный профиль и оптимальные концентрации реагентов.
The article is devoted to the development of methods for finding the optimal temperature regime for a catalytic reaction with a variable reaction volume. In this work, the problem of theoretical optimization of a catalytic reaction is formulated in general terms, in which the control parameter is the reaction temperature, the phase variables are the concentrations of substances and the relative change in the number of moles of the reaction medium. To search for a numerical solution of the formulated problem of optimal control with a constraint on the control parameter, an algorithm based on the differential evolution method is proposed. The operation of the algorithm was tested on the catalytic reaction of the synthesis of benzylidenebenzylamine. A mathematical model of the reaction is described taking into account the change in the reaction volume during the course of the reaction, on the basis of which the problem of finding the optimal temperature regime in order to obtain the maximum concentration of the reaction product, benzylidenebenzylamine, is formulated. The optimal temperature profile and optimal concentrations of reagents were obtained.