bluuebunny/crossref_metadata_2025 huggingface dataset:
Resistência à fratura de raízes fragilizadas reabilitadas com pinos de fibra de vidro reembasados ou fresados
Authors:   , Maia Belizane das Graças Oliveira
Published: October 2022

O objetivo no presente estudo foi comparar a resistência à fratura de raízes fragilizadas restauradas com pinos de fibra de vidro (PFV) fresados através da tecnologia CAD/CAM e préfabricados reembasados com diferentes resinas. Para este estudo experimental laboratorial in vitro, setenta incisivos bovinos foram tratados endodonticamente e divididos em sete grupos (n=10), de acordo com o protocolo de fragilização radicular (moderada: 1mm de dentina remanescente ao redor do canal radicular; ou severa: 0,5mm de dentina remanescente) e a técnica de anatomização do pino. No grupo controle, não houve fragilização e o PFV foi cimentado diretamente. Nos grupos FM-Z350 e FS-Z350, raízes com fragilização moderada (FM) ou severa (FS) receberam PFV reembasados com resina composta nanoparticulada convencional. Nos grupos FM-Bulk fill e FS-Bulk fill, raízes com FM ou FS, receberam PFV reembasados com resina do tipo Bulk fill. Nos grupos FM-Fresado e FS-Fresado, raízes com FM ou FS, receberam PFV fresados. Após ciclagem termomecânica (88 N, 3,8 Hz, 1.200.000 ciclos, equilíbrio térmico entre 5°C e 45°C) as raízes foram submetidas à compressão estática em uma máquina de ensaios universal até a fratura. O modo de falha foi analisado em estereomicroscópio (7,5x) e as frequências comparadas pelo teste qui-quadrado. Os grupos foram comparados por meio de ANOVA dois fatores, post hoc de Tukey e Teste T, com significância de 5%. O valor médio de resistência à fratura (Kgf) foi de 47,5 para o grupo controle. Nos grupos com fragilização moderada, os valores médios foram, 65.5 no grupo FMBulk fill, 63.4 no grupo FM-Z350 e 56.4 no grupo FM-F. Nos grupos com fragilização severa, 72.7 no grupo FS-Bulk fill, 65.7 no grupo FS-Z350 e 16,8 no grupo FS-F. O grupo FS-F obteve os menores valores, com diferença significante em relação a todos os grupos (p < 0,001) e o maior valor foi no grupo FS-Bulk fill, com diferença em relação a FM-F (p = 0,037) e FS-F (p < 0,001). Na comparação com o controle, FM-Bulk fill, FM-Z350, FS-Bulk fill e FS-Z350 apresentaram valores superiores de resistência à fratura; FS-F, valor inferior e FM-F sem diferença. No grupo controle, a frequência de fraturas reparáveis foi de 100%, e nos grupos com fragilização moderada e severa, foi de 87% e 63%, respectivamente. Concluiu-se que raízes com fragilização severa reabilitadas com pinos de fibra de vidro fresados apresentaram menores valores de resistência à fratura em relação ao grupo controle e aos reembasados. Entretanto, o padrão de falha apresentado em todos os grupos foi predominantemente do tipo reparável. A quantidade de estrutura dental remanescente foi determinante na sobrevivência do dente, uma vez que dentes com fragilização severa apresentaram frequência maior de falhas catastróficas.
Burnout and compassion competency to explain job satisfaction among nurses working in intensive care units or emergency rooms
Authors: Choi Hyojeong , Song Rhayun
Published: October 2022

Purpose : This study aimed to examine the relationships of burnout and compassion competency with job satisfaction among nurses working in the intensive care units and emergency rooms.Methods : A correlational survey was conducted from August 1 to August 14, 2018 and involved in 102 nurses working at four university hospitals for more than 1 year. A structured questionnaire was used to measure burnout, compassion competency, and job satisfaction, and data were analyzed using hierarchical multiple regression and mediation effect analysis.Results : The mean scores of burnout, compassion competency, and job satisfaction were 2.58, 4.35, and 2.95, respectively. Burnout and compassion competency along with working night shifts and a wish to transfer explained 35.3% of variance in job satisfaction. Compassion competency showed a small but significant mediating effect in the relationship between burnout and job satisfaction (indirect effect -.0446, 95% CI -.1133, -.0075).Conclusion : Burnout and compassion competency were the significant influencing factors of job satisfaction among nurses working in intensive care units and emergency rooms. Since compassion competency showed a significant mediating effect, further studies should focus on intervention strategies for compassion competency to improve job satisfaction in this population.
Item analysis of the Korean version of the Intensive Care Experience Questionnaire: Using the Rasch Model based on Item Response Theory
Authors: Kang Jiyeon , Kim Minhui
Published: October 2022

Purpose : This study aimed to examine the item characteristics of the Korean version of the intensive care experience questionnaire (K-ICEQ) using the Rasch analysis model of the item response theory.Methods : In this methodological study, the validity of the scale was examined, and a secondary analysis was conducted using cohort data of patients who were discharged from the intensive care units (ICU). Data from 891 patients who responded to the K-ICEQ upon ICU discharge were analyzed. The WINSTEP program was used to analyze item characteristics, including item difficulty, fit indices, appropriateness scale, and separation reliability.Results : The difficulty level of all 26 items of the K-ICEQ was appropriate, and the fit indices of the 25 items, except for item 18, were good. The 5-point scale of the K-ICEQ was not appropriate in the three subscales. The item separation reliability was good in all subscales, but did not meet the criteria in terms of respondents.Conclusion : The results of examining the item characteristics of the K-ICEQ revealed a good degree of difficulty, fitness, and item separation reliability. To increase the validity of the K-ICEQ, we suggest the rearrangement of the overall item order, modification of the item description of the “recall of experience” subscale, and reduction of the scale response level.
Validation of the Risk Prediction Tool for Wound Infection in Abdominal Surgery Patients
Authors: Jung Hyun Kyoung , Lee Eun Nam
Published: October 2022

Purpose : This retrospective investigation study aimed to determine the predictive validity of superficial surgical site infection assessment tools by measuring the risk score at the surgical site.Methods : This study included patients hospitalized to the general surgery department of a Hospital from January 2021 to December 31, 2021. The inclusion criteria were age ≥19 years, general abdominal surgery under general anesthesia, and hospital stay longer than 2 days. Patients who had undergone transplantation were excluded.Results : Tool validity results showed that tools including surgical time and operative procedure were more accurate than previously developed tools, with a sensitivity of 71.1%, specificity of 71.4%, positive prediction of 12.3%, negative prediction of 97.8%, and area under the curve of 0.743 (95% confidence interval, 0.678~0.745). The tool's cut-off score was 15, and the risks of infection was increased by 6.14 times at or above this cut-off point. Preoperative hair removal period, surgical wound classification, surgery time, body temperature on the second day after surgery, drainage tube type, and suture type affected the risk of infection at the surgical site.Conclusion : The incidence of healthcare-associated infections has been declining in the past decade; however, surgical site infections still account for a considerable proportion. Therefore, early identification of high-risk groups for surgical site infection is crucial for reducing the incidence of surgical site infection using appropriate management.
Subpopulation Composition of Peripheral Blood Lymphocytes and its Prognostic Significance in Children with Acquired Aplastic Anemia
Authors: Емельянова И.В. , Углова Т.А. , Быданов О.И. , Мовчан Л.В.
Published: October 2022

Установлено, что 64-й и 180-й дни иммуносупрессивной терапии (ИСТ) у детей с приобретенной апластической анемией (ПАА) являются информационными точками ее эффективности. Достижение гематологического ответа (ГО) к 180-му дню ИСТ ассоциировано с долгосрочными результатами лечения.Выявлены изменения субпопуляционного состава лимфоцитов ПК у детей с ПАА: снижение инициального относительного содержания CD16+CD56+ лимфоцитов и CD19+ лимфоцитов (р<0,0001; р=0,0003 соответственно) и инициального содержания CD3+HLA-DR+ лимфоцитов и CD3+CD8+ лимфоцитов (р<0,0001; р<0,0001 соответственно) по сравнению с аналогичными показателями у детей группы контроля. Установлено, что уровень CD19+ лимфоцитов на 64-й день ИСТ позволяет прогнозировать ГО к 180-му дню проведения ИСТ.Выявлено увеличение бессобытийной выживаемости пациентов с тПАА, получивших ИСТ с дополнительным введением биомедицинского клеточного продукта мезенхимальных стволовых клеток (БМКП МСК).

The 64th and 180 days of immunosuppressive therapy (IST) in children with acquired aplastic anemia (AАА), are detremined to be information points of its effectiveness. The achievement of a hematological response (HR) by the 180th day of IST is associated with long-term treatment results.Changes in the subpopulation composition of peripheral blood lymphocytes (PВ) in children with АА were revealed: a decrease in the initial relative content of CD16+CD56+ lymphocytes and CD19+ lymphocytes (p<0.0001; p=0.0003, respectively) and an increase in the initial content of CD3+HLA-DR+lymphocytes and CD3+CD8+ lymphocytes (p<0.0001; p<0.0001, respectively) compared with similar indicators in children in the control group.It was found that the level of CD19+ lymphocytes on the 64th day of the IST allows predicting HR by the 180th day of the IST.An increase in the event-free survival of patients with sAAA who received IST with additional administration of a biomedical cellular product of mesenchymal stem cells (BMCP MSCs) was revealed.
New Translocation Established by NGS in Tumor Material from a Pediatric Patient with Alveolar Rhabdomyosarcoma
Authors: Белобокова В.Д. , Кальченко К.О. , Михалевская Т.М. , Кочубинский Д.В. , Белевцев М.В. , Киселев Л.П.
Published: October 2022

Результаты современных исследований подтверждают необходимость точных молекулярных исследований мягкотканных новообразований. Высокопроизводительноесеквенирование следующего поколения может быть эффективным методом как для подбора таргетной терапии, так и для прогнозирования степени агрессивности биологического поведения опухоли. В данной работе описан случай альвеолярной рабдомиосаркомы у ребенка трехлетнего возраста. В ткани новообразования для данного пациента было проведено молекулярно-генетическое исследование методом высокопроизводительного секвенирования с применением панели генов TruSight™ Tumor 170 (Illumina, США). По результатам исследования была выявлена транслокация NSD1-FGFR4, ранее не описанная в литературе у пациентов с рабдомиосаркомой альвеолярного типа.

The results of modern research confirm the need for accurate molecular studies of soft tissue neoplasms. High-throughput next-generation sequencing can be an effective method for both selecting targeted therapy and predicting the degree of aggressiveness of the biological behavior of a tumor. This paper describes a case of alveolar rhabdomyosarcoma in a three-year-old child. In the tumor tissue for this patient, a molecular genetic study was performed using high-throughput sequencing using the TruSight™ Tumor 170 gene panel (Illumina, USA). The results of the study revealed a translocation of NSD1-FGFR4, which has not been previously described in the literature for patients with alveolar-type rhabdomyosarcoma.
Comparative analysis of the results of decompressive interventions in elderly patients with cauda equine syndrome caused by lumbar spinal stenosis
Authors: Бывальцев В.А. , Калинин А.А. , Шепелев В.В. , Пестряков Ю.Я. , Голобородько В.Ю. , Хозеев Д.В. , Сатардинова Э.Е. , Комогорцев И.Е. , Щеголев А.В.
Published: October 2022

Цель исследования - оценка результатов хирургического лечения и эффективности клинического восстановления пациентов пожилого возраста с синдромом конского хвоста (СКХ), обусловленного дегенеративным стенозом позвоночного канала, после выполнения открытой и минимально-инвазивной декомпрессии. Проведен ретроспективный анализ послеоперационных исходов у 50 пациентов старше 60 лет, которым выполнены изолированные открытые ( n =21) и минимально-инвазивные ( n =29) декомпрессивные вмешательства по поводу СКХ, обусловленного стенозом позвоночного канала. Для сравнительной оценки использовали технические особенности вмешательства, специфичность послеоперационного ведения пациентов, клинические исходы и периоперационные осложнения. В результате установлены преимущества малотравматичной изолированной декомпрессии в сравнении с открытой по меньшему объему кровопотери и продолжительности госпитализации, низкой потребности пациентов в послеоперационном обезболивании, минимальному количеству периоперационных хирургических осложнений, динамике неврологической симптоматики, лучшему клиническому восстановлению функционального состояния по шкале ODI и качеству жизни по опроснику SF-36 в отдаленном послеоперационном периоде.

The aim of the study was to evaluate the results of surgical treatment and the effectiveness of clinical recovery in elderly patients with cauda equina syndrome (CES) caused by degenerative spinal canal stenosis after isolated open and minimally invasive decompression. A retrospective analysis of the results of surgical treatment of 50 patients over 60 years of age who underwent isolated open (n=21) and minimally invasive (n=29) decompressive interventions for CES caused by lumbar spinal stenosis was performed. For comparative analysis, we used the technical features of the intervention, the specificity of postoperative management of patients, clinical parameters, and the number of perioperative complications. As a result, the advantages of minimally invasive isolated decompression compared to open decompression due to a smaller volume of blood loss and duration of hospitalization, low need for postoperative pain relief, a minimum number of perioperative surgical complications, as well as the dynamics of neurological symptoms, better efficiency of clinical recovery of functional state indicators according to ODI and quality life according to SF-36 in the late postoperative period.
Restriction of breastfeeding in the early postnatal period leads to metabolic and endocrine disorders in eighteen-month-old male rats
Authors: Деркач К.В. , Бондарева В.М. , Шпаков А.О.
Published: October 2022

Дефицит грудного вскармливания в раннем постнатальном периоде может приводить к метаболическим и гормональным нарушениям во взрослом возрасте. Однако исследования влияния голодания в раннем онтогенезе на метаболические и гормональные показатели у старых животных отсутствуют. Практически не изучено влияние такого голодания на функции эндокринной системы. Цель исследования - изучение того, как прерывание лактации у кормящих самок крыс (на 19-21-й день постнатального развития крысят) влияет на метаболические показатели, толерантность к глюкозе, чувствительность к инсулину и гормональный статус гонадной и тиреоидной осей у их потомства, 18-месячных самцов крыс. Ингибирование лактации вызывали с помощью обработки самок крыс бромокриптином (10 мг/кг в сутки). Показано, что старые самцы крыс с частичным лишением грудного вскармливания имеют характерные признаки метаболического синдрома - повышенную массу тела и жировой ткани, нарушенную толерантность к глюкозе, инсулиновую резистентность, гиперлептинемию. У них снижен уровень тестостерона и тиреоидных гормонов, повышен уровень ТТГ, снижены стероидогенный ответ на гонадолиберин и стимулирующий эффект тиролиберина на уровень тироксина. Таким образом, краткосрочная депривация грудного вскармливания, вызванная бромокриптин-индуцированным ингибированием лактации у кормящих самок, приводит к развитию метаболического синдрома и гормональной дисрегуляции репродуктивной и тиреоидной систем у 18-месячных самцов крыс.

Breastfeeding deficiency in the early postnatal period can lead to metabolic and hormonal disorders in adulthood. However, there are no studies on the effect of starvation in early ontogeny on metabolic and hormonal parameters in aging animals. The effect of such starvation on the functions of the endocrine system has not been practically studied. The aim of this work was to study how interruption of lactation in lactating female rats (19-21 days of postnatal development of rat pups) affects metabolic parameters, glucose tolerance, insulin sensitivity, and hormonal status of the gonadal and thyroid axes in their offspring, 18-month-old male rats. Inhibition of lactation was induced by treating female rats with bromocriptine (10 mg/kg/day). It has been shown that aging male rats with partial deprivation of breastfeeding have characteristic signs of the metabolic syndrome, such as the increased body weight and adipose tissue, impaired glucose tolerance, insulin resistance, and hyperleptinemia. They have reduced levels of testosterone and thyroid hormones, increased levels of thyroid-stimulating hormone, reduced steroidogenic response to gonadoliberin and a decrease in thyroliberin stimulating effect on thyroxine levels. Thus, short-term deprivation of breastfeeding caused by bromocriptine-induced inhibition of lactation in lactating females leads to the development of metabolic syndrome and hormonal dysregulation of the reproductive and thyroid systems in 18-month-old male rats.
Kerokan and Benefits Provided In Maintaining Health Level During Pandemic
Authors: Aldo Eka Putra Tjundawan Alfredo , Onny Priskila  , Mellisa  , Ferdinand  , Suryawan Ang  , Agus Sugiono
Published: October 2022

Scraping is one of the oldest traditional medical methods. Scraping is one of the Chinese Medicine Techniques. Scrapings are known and used in various regions of Asia. Scrapings are considered to have benefits for maintaining a healthy body, increasing immunity against disease, and preventing disease entry into the body. This study aimed to examine the benefits of scrapings on health in preventing disease, maintaining body stability, and curing illness. The benefits of this research are the development of science in the health sector. The research method used is a qualitative method with a literature study approach. The results showed that scrapings could increase antioxidants and boost the body's immune system as long as scrapings are carried out according to the correct principles and methods. Scraping has a good impact on maintaining the level of public health during a pandemic because, during a pandemic, access to health facilities is very much restricted, so alternative self-medication becomes an essential thing to do. It can be concluded that scraping is a treatment technique that deserves to be studied and applied to maintain health in everyday life.
The Relationship of Covid-19 Pandemic Anxiety with Ante-Natal Care Examination at Sei Semayang Puskesmas, Sunggal District, Deli Serdang Regency
Authors: Putri Br Sembiring Ninsah , Juliana Munthe  , Henny Rista  , Laria Simamora  , Srilina Br Pinem  , Yanti Farida Saragih
Published: October 2022

The Corona Virus (Covid-19) is a non-natural disaster that increases deaths that have an impact on Indonesia's social economy. This makes pregnant women feel anxious. Ethiopia, Nigeria, Senegal, South Africa, Uganda, and Zimbabwe have a high prevalence of mental anxiety problems including pregnant women (25.6%) and postpartum mothers (19.8%). Anxiety disorders can interfere with the growth and contraction of uterine muscles, affecting both mother and baby. This study aims: to determine the relationship between COVID-19 pandemic anxiety and pregnancy check-ups at the Sei Semayang Health Center, Sunggal District, Deli Serdang Regency. Research Population: The population is all elements / research subjects of pregnant women at the Sei Semayang Health Center, Sunggal District, Deli Serdang Regency as many as 33 samples. Research Type: This research is in the form of an analytic survey, using a cross sectional with Ante Natal Care (ANC) with sampling through interviews with respondents using a questionnaire called primary data and documenting data collection from the annual report of the Sei Semayang Health Center, Sunggal District, Deli Serdang Regency. The results of the study: The relationship between Covid-19 pandemic anxiety and Ante Natal Care (ANC) examination with a p value 0.006
Hybrid Vertical Wind Turbine Design and Analysis
Authors: AKBUDAK Barış , DOĞAN Rasim
Published: October 2022

Bu çalışma kapsamında, rüzgâr gücünden faydalanarak geleneksel türbinlerden farklı olarak tasarımının ve analizlerinin yapıldığı hibrit düşey rüzgâr türbinlerinin karşılaştırılması gerçekleştirilmiştir. Bunun için araştırmalar sonucunda üç farklı kanat tipinde tasarım ortaya koyulmuş ve analiz işlemi gerçekleştirilmiştir. İncelenen türbin tasarımlarının içerisinden en yüksek verimi sağlayan kanat profilleri ile tasarımlar gerçekleştirilmiştir. Yapılan bu tasarımlar simülasyon ortamında test edilmiş ve sonuçları sunulmuştur.
The Effect of Cutting Parameters on Chip Temperature in Cutting of AISI 1040 Material with a High Performance Autonomous Circular Saw Machine
Authors: YILDIZ Seda
Published: October 2022

Testere çeşitli endüstrilerde, özellikle ikincil işlemler için hammaddeyi kesmesi gereken çelik tedarikçilerinde önemli bir birincil işlemdir. Şerit testere ve demir testeresine göre daha yüksek özelliklere göre üretilen, çevresine yerleştirilmiş çok sayıda kesme dişlerine sahip dairesel bir testere plakasından (daire testere gövdesi) oluşan dairesel testere bıçakları yüksek derecede boyutsal doğruluk gerektiren endüstriyel kesme işlemleri için kullanılmaktadır. Talaşlı imalatta harcanan gücün neredeyse tamamı ısıya dönüşmektedir. Kesme işleminde testere bıçağı, sürtünmeden kaynaklanan ısı ile ısınır. Kesme sırasında oluşan sıcaklıkların ölçülmesi oldukça zahmetli bir iştir, termal kameralar bu zahmetli iş için en gelişmiş araçlar olarak öne çıkmaktadırlar; ancak bu gelişmiş teknolojilerin kesme tezgâhları ile bütünleşmesi için hala araştırmaya ihtiyaç vardır. Bu çalışmada kesme parametrelerinin talaş sıcaklığı açısından optimizasyonu amaçlanmıştır. Çalışmada iki seviyeli dört farklı parametre seçilmiştir. Çalışma parçası olarak endüstride yaygın olarak kullanılan AISI 1040 tercih edilmiştir. Kesme deneyleri Taguchi metoduyla tasarlanmıştır. Yapılan deneyler sonunda kesim sıcaklığı talaşlar üzerinden alınan sıcaklıklar ile incelenmiştir. Sermet bıçak ile yapılan kesimlerde daha yüksek hızlara çıkması sebebiyle daha yüksek kesim sıcaklıklarına ulaşılmıştır.
Determination of Drying Rate and Some Quality Parameters of Madımak (Polygonum cognatum Meisn.) Dried at Different Temperatures
Authors: UĞUR Elif , SARI Ferda
Published: October 2022

Bu çalışmada madımak (Polygonum cognatum Meisn.) bitkisi tepsili kurutucuda 40, 50 ve 60 oC’de kurutulmuştur. Sıcaklığın madımağın kuruma kinetiği, toplam fenolik madde içeriği, antioksidan kapasitesi, klorofil a, b ve toplam klorofil miktarı üzerine etkisi incelenmiştir. Madımağın kuruma eğrisini tanımlamak için Page, Newton ve Weibull olmak üzere 3 farklı model test edilmiştir. Uygulanan tüm koşullarda en iyi uyum sağlayan modelin Page model olduğu belirlenmiştir. Kurutma azalan hız periyodunda gerçekleşmiş olup uygulanan sıcaklığın artmasıyla kuruma oranı artmış ve kuruma süresi ise azalmıştır. Kurutulmuş madımağın toplam polifenol içeriği ve antioksidan kapasitesi sırasıyla 21.06-27.80 mg GAE g-1 KM ve % 66.82-76.33 arasında değişmiştir. Her üç sıcaklık için de, kurutma sonrası madımağın toplam fenolik madde içeriği ve antioksidan kapasitesinde taze örneğe göre azalma saptanmıştır. Azalma en fazla 40 oC’de en az ise 60 oC’de tespit edilmiştir. Uygulanan tüm sıcaklıklar için, kurutulmuş madımağın taze örneğe göre daha az klorofil a, b ve toplam klorofil içerdiği belirlenmiştir. Klorofildeki bu azalma, en fazla 60 oC’de en az ise 40 oC’de gözlenmiştir.
Investigation Of Perlite Added Ceramic Body Properties
Authors: BAŞAR Fatma Sena , ACARTÜRK Buket
Published: October 2022

Perlite is a type of volcanic glass that is formed in nature as a result of the cooling of magma lava and contains water droplets in its structure. It is a raw material that is not harmful to health, is environmentally friendly, and is easy to use because it is produced at high temperatures. The properties of this raw material that enable it to be used in many fields of industry have formed the factors determining the study titled "Investigation of Perlite Added Ceramic Body Properties". In the art of ceramics, while the artists create their clay; they add alternative materials to provide flexibility, reduce the weight of large-sized forms, and provide different textures and aesthetic qualities. There are a wide variety of organic and inorganic raw materials added to the body. This study, it was aimed to determine the usability and additive ratios of perlite in ceramic bodies. Body recipes were prepared by adding 0%, 3%, 5%, and 7% perlite to chamotte and casting slip. The prepared bodies were fired at 950°C and 1200°C. Perlite-added bodies were compared with perlite-free bodies, and total shrinkage and water absorption tests were carried out. As a result of the experiments carried out in line with the study; It has been observed that 7% perlite additive causes deformation in casting slip, and no deformation occurs at all additive ratios in chamotte. It has been observed that perlite additive has positive effects on color and sintering properties in both clay types, regardless of firing temperature.
Mineralogical and Semi-Quantitative Chemical Composition of Some Talc Powders Sold on the Turkish Market
Authors: ÇELİK KARAKAYA Muazzez , KARAKAYA Necati
Published: October 2022

40 of the talcum powders sold in Turkey were investigated to determine whether they contain dangerous minerals such as chrysotile and tremolite for human health. Mineralogical and semi-quantitative chemical analyzes of the powders were made. Besides talc, mostly calcite, kaolinite, magnesite, smectite/chlorite, dolomite, quartz and rarely chrysotile (?) and tremolite were determined in the powders. It was determined that the calcite content was close to talc in some samples. Talc, tremolite and chrysotile crystals are partly flat and partly pointed and splintered. In addition, acicular, twisted, filamentous morphology crystals were also determined. Stack appearance is also observed in the fibers, sometimes in rod, tubular, and plate-like shapes. The size of the rod-like crystals is larger than those given in the literature for chrysotile (≥5µm). In the semi-quantitative chemical composition analysis, in addition to Si and Mg in the structure of silicate minerals, Fe, Ca and Al contents in many crystals were also determined. The same ratio was determined as the Mg:Si=3:2 ratio in the structural formula of chrysotile in rod-like/filamentous morphology. In general, the Si content is much higher than that of Mg, while in a few analyzes the content of these elements has been found to be close to equal. Fe or Al content has also been determined in some crystals and the Fe content should be taken into account. Because Fe, asbestos minerals may cause the risk of cancer formation in the tissues in the biological system. In addition, micron-sized quartz may carry the risk of silicosis.
Aprender con pensamiento visual
Authors: Bazán Mariana Beatriz
Published: October 2022

Este libro muestra el aporte que hace el pensamiento visual y en particular el uso de los organizadores gráficos. Se basa en el reconocimiento de que los estudiantes comprenden mejor cuando se les muestra la información de una manera ordenada y sintetizada. Más aún, cuando producen su propia información y logran de esta manera aprender a aprender autónomamente.
BIOPROSES PENGURAIAN LIMBAH CAIR BUANGAN INDUSTRI PANGAN DAN NON-PANGAN BERBASIS BIOSURFAKTAN
Authors: Soeka Yati Sudaryati , Sulistyo Joko
Published: October 2022

Biosurfactants are microbial metabolites that may be utilized to replace synthetic chemical surfactant in overcoming the problem of industrial wastewater pollution. Indications of the presence of biosurfactant activity may be determined through measurement of emulsification and enzymatic activity of the tested microorganisms on their growth media, which is indicated by decreasing the BOD and COD of the tested growth media containing wastewater material as an inducer added to the microbial growth medium. This research was conducted to examine several potential microbial isolates that produce biosurfactants on growth media containing mixed waste water. The results showed that some of the microbial cultures tested showed the potential to produce biosurfactants as indicated by the emulsification and enzymatic activity of the tested microbial culture. Trial on mixed industrial wastewater showed that the tested biosurfactants were able to reduce the levels of BOD (440-1300 mg/l) and COD (1240-1760 mg/l) of the wastewater samples up to low BOD levels (82 mg/l) and COD (116 mg/l), respectively, thus that it meets the requirements of the established wastewater quality standards according to the Indonesian Standard regarding with the respective BOD (50-100 mg/l, 06-6989.9-2004 SNI) and COD (100-250 mg /l, 06-6989.2-2004 SNI).Key words : biosurfactant, emulsification, microbial enzyme, wastewater, BOD, COD.
Pemanfaatan Tepung Cangkang dan Kepala Udang Vaname (Litopenaeus vannamei) terhadap Penurunan Hiperkolesterolemia secara In Vivo
Authors: Ngitung Rosdiana , Sahribulan Sahribulan , Rahmadani A. Sri
Published: October 2022

Penelitian ini bertujuan untuk mengetahui pengaruh dan konsentrasi optimum pemberian tepung cangkang dan kepala udang vaname (Litopenaeus vannamei) terhadap penurunan hiperkolesterolemia pada mencit (Mus musculus). Penelitian ini terdiri dari 4 kelompok perlakuan yaitu P0 (pakan hiperkolesterol dicampur tepung cangkang dan kepala udang sebesar 0%), P1 (pakan hiperkolesterol dicampur tepung cangkang dan kepala udang sebesar 5%), P2 (pakan hiperkolesterol dicampur tepung cangkang dan kepala udang sebesar 7%), dan P3 (pakan hiperkolesterol dicampur tepung cangkang dan kepala udang sebesar 9%). Metode penelitian terdiri dari beberapa tahap yaitu pembuatan pakan hiperkolesterol, pembuatan tepung cangkang dan kepala udang, pembuatan pakan perlakuan hewan uji, perlakuan hewan uji, serta pengukuran kadar kolesterol. Analisis data menggunakan uji One Way ANOVA dan uji lanjut Duncan. Hasil penelitian menunjukkan nilai rata-rata kadar kolesterol awal kelompok perlakuan P3 berbeda sangat nyata terhadap kelompok perlakuan P0, P1, dan P2. Nilai rata-rata kadar kolesterol akhir kelompok perlakuan P2 berbeda sangat nyata terhadap P0 dan berbeda nyata terhadap P1 dan P3. Hasil penelitian menunjukkan bahwa konsentrasi tepung cangkang dan kepala udang paling optimum ialah 7% (P2) yang mampu menurunkan hiperkolesterolemia pada mencit (Mus musculus) sebesar 0.29%.
PENGARUH JENIS SUMBER NITROGEN TERHADAP KARAKTERISTIK NATA DE SAGO
Authors: Mutmainnah Heni - , Renhoat Farida
Published: October 2022

Nata is a biotechnology product that utilizes Acetobacter xylinum in the fermentation process. Making nata requires materials that contain carbohydrates and nitrogen. The raw materials for making nata generally use coconut water, fruit extracts, and sago waste. Sago liquid waste can be used because it contains starch as a carbon source to form polysaccharides. In addition to starch content, making nata also requires nitrogen supply. Increased nitrogen supply can increase the amount of polysaccharide formed. This study aims to determine the effect of giving different types of nitrogen sources, namely urea, ZA, and touge extract and control without the addition of nitrogen on the characteristics of nata de sago. This study used the RAL method (Completely Randomized Design) which consisted of 4 treatments and 3 repetitions. The results showed that the addition of 1.5 g of urea produced the best nata characteristics based on thickness, color, and aroma, but based on texture characteristics the best value was obtained in the bean sprout extract treatment. The results of this study become an alternative to the use of sago leachate as a raw material for making nata and an alternative to the use of natural nitrogen sources from bean sprout extract which is organic and has no residue in the final product of nata.Key words: Nata de sago, nitrogen, organoleptic
Kesalahan dan Kesulitan Mahasiswa Pendidikan Matematika Unismuh dalam Menegasikan Definisi Limit Fungsi
Authors: Qadry Ikhbariaty Kautsar , Firdaus Andi Mulawakkan , M Muhammad Darwis , Asyari Syahrullah , Ramdani Rezki
Published: October 2022

Penelitian ini adalah penelitian kualitatif yang bertujuan mengetahui kesalahan dan kesulitan mahasiswa pendidikan matematika Unismuh dalam menegasikan definisi limit fungsi. Subjek penelitian ini adalah dua orang berkemampuan logika matematika tinggi, mahasiswa Semester II Program Studi Pendidikan Matematika Unismuh Makassar. Penelitian ini menggunakan teknik triangulasi metodologi untuk mengecek keabsahan data, yaitu metode pemberian tes dan wawancara. Oleh karena itu, ada dua instrumen pendukung dalam penelitian ini, yaitu tes, berupa Tes Kemampuan Logika Matematika yang digunakan untuk menjaring subjek penelitian, dan Tes Kemampuan Menegasikan Definisi Limit Fungsi. Hasil penelitian menunjukkan bahwa dua subjek memiliki kesamaan dan perbedaan. Salah satunya mengalami semua jenis kesalahan dalam prosedur Newman, dan satu yang lain tidak mengalami Transformation Error saja. Kedua subjek penelitian mengalami kesulitan yang sama dalam menghadapi pernyataan berkuantor majemuk. Mereka kesulitan menjustifikasi kuantor dan maknanya, kesulitan menentukan fungsi pernyataannya, dan kesulitan menentukan bagian yang ingin dinegasikan. Kata kunci: kesalahan, kesulitan, negasi, definisi limit fungsi. This is a qualitative research aimedat uncovering the mistakes and difficulties of mathematics education students of Unismuh in negating the definition of limit of function. The research subjects were two students of the second semester of the mathematics education study program of Unismuh with high ability in mathematical logic. This study used a methodological triangulation technique to check the validity of the data. It was to provide the subjects with tests and interviews. There were two supporting instruments in this study, namely, a test such a mathematical logic ability test which was used to select the students to be the research subjects, and a test for investigating their ability to negate the definition of limit of function. The results show that the two subjects have similarities and differences. One of them experiences all the types of Newman errors, and the other one has no transformation error type only. The two subjects experience the same difficulty in dealing with statements with multiple quantifiers. They have difficulty in justifying the quantifier and its meaning. Also, difficulty in finding the function of the statement and justifying the part to negate. Keywords: error,difficulty, negation, definition of limit of function.
Analisis Kandungan Gizi Kopi Biji Salak Desa Pekkabata Kecamatan Duampanua Kabupaten Pinrang
Authors: Pratiwi Diana Eka , Putri Suriati Eka , Wardhana haeruddin Muhammad Ilham
Published: October 2022

Analisis kandungan gizi kopi biji salak Desa Pekkabata Kecamatan Duampanua Kabupaten Pinrang bertujuan untuk mengetahui kandungan protein, kadar lemak, dan karbohidrat yang terkandung dalam kopi biji salak produk PKM Badan Kontak Majelis Taklim (BKMT) Desa Pekkabata. Berdasarkan hasil wawancara dan observasi dengan masyarakat setempat, salak hasil panen biasanya dijual ke pasar dan juga biasanya dikonsumsi sendiri, namun biji salak hanya dibuang begitu salak. Dengan demikian tim pengabdi melakukan penyuluhan mengenai pembuatan kopi bijisalak. Berdasarkan hasil analisis diperoleh kadar protein sebesar 4,42%; kadar lemak 12,19%; dan kadar karbohidrat 46,74%.Kata kunci: kopi, biji salak, kandungan gizi. The analysis of the nutritional content of salak seed coffee in Pekkabata Village, Duampanua District, Pinrang Regency aims to determine the protein content, fat content and carbohydrates contained in the zalacca seed coffee products of Community Partnership Program (PKM) BKMT Pekkabata Village. Based on the results of interviews and observations with the local community, the farmed salak is usually sold to the market and is also usually consumed alone, however the zalacca seeds are only thrown away. Thus the PKM team conducted counseling on the making of zalacca seed coffee. Based on the analysis results obtained protein content of 4.42%; fat content 12.19%; and carbohydrate content of 46.74%.Keywords: coffee, salak seed, nutritional content.
Peningkatan Kemampuan Representasi Matematis melalui Media Lipa’ Sa’be Mandar
Authors: Samad Irfawandi , Ahmad Herlina , Febryanti F.
Published: October 2022

Penelitian ini bertujuan untuk meningkatkan kemampuan representasi matematis siswa di SMK Mega Link Majenemelalui media pembelajaran lipa’ sa’be Mandar.Jenis penelitian ini merupakan penelitian tindakan kelas yang dilaksanakan selama 2 siklus yang meliputi empat tahapan yaitu perencanaan, pelaksanaan observasi dan evaluasi serta refleksi.Teknik analisis menggunakan analisis statistika deskriptif. Hasil penelitian diperoleh nilai rata-rata kemampuan representasi matematis sebesar 82,65 dengan standar nilai KKM sebesar 70. Sedangkan nilai ketuntasan secara klasikal sebesar 84,21% dengan standar 80%. Aktivitas siswa dan keterlaksanaan guru dalam menerapkan pembelajaran melalui media lipa’ sa’be Mandar berada pada kategori terpenuhi.Berdasarkan hasil penelitian, maka disimpulkan penerapan media pembelajaran lipa’ sa’be Mandar mampu meningkatkan kemampuan representasi matematis siswa SMK Mega Link Majene.Kata kunci: Representasi Matematis, Media Pembelajaran, Lipa’ Sa’be Mandar This research aims to improve the ability of mathematical representation of the students in SMK Mega Link Majene through the media learning Lipa ' Sa'be Mandar. This type of research is a class action study conducted during 2 cycles that includes four phases, namely planning, observation and evaluation and reflection. Analytical techniques using descriptive statistical analysis. The results of the study obtained an average value of the mathematical representation capability of 82,65 with a standard KKM value of 70. Meanwhile, the classifications of the classic value of 84,21% with standard 80%. Student activity is in very active category. The implementation of researchers in applying learning through Media lipa ' sa'be Mandar well done. Based on the results of the research, it was concluded the application of learning Media lipa ' sa'be Mandar able to improve the mathematical representation capability of SMK Mega Link Majene.Keywords: Mathematical Representation, Media Learning, Lipa' Sa'be Mandar
Profil Sikap Ilmiah Siswa Kelas IV SD Inpres Ana Gowa dan SD Negeri Tombolo K
Authors: Rusni R. , Bahri Arsad , Ristiana Evi
Published: October 2022

Penelitian ini bertujuan untuk mengetahui gambaran sikap ilmiah siswa kelas IV SD Inpres Ana Gowa dan SD Negeri Tombolo K. Penelitian ini adalah penelitian survei dengan analisis data menggunakan statistik deskriptif. Populasi dalam penelitian ini adalah seluruh siswa kelas IV SD Inpres Ana Gowa dan SD Negeri Tombolo K. Teknik sampling yang digunakan adalah simple random sampling. Sampel dalam penelitian ini adalah siswa kelas IVB dan IVC SD Inpres Ana Gowa dan siswa kelas IVA dan IVB SD Negeri Tombolo K dengan jumlah sampel 124 siswa. Teknik pengumpulan data menggunakan angket sikap ilmiah. Hasil penelitian menunjukkan bahwa sikap ilmiah siswa memiliki rerata skor realtif sama.Indikator sikap ilmiah yang memiliki rerata skor tertinggi adalah sikap mendahulukan data atau fakta dengan persentase 63,50% dan skor indikator sikap ilmiah terendah adalah sikap berpikir kritis dengan persentase 62,20%. Hal ini menunjukkan sikap ilmiah siswa masih perlu dikembangkan dalam proses pembelajaran agar berpengaruh terhadap hasil belajar kognitif dan utamanya hasil belajar afektif dalam pembelajaran IPA. Kata kunci: Sikap ilimiah, hasil belajar IPA afektif This study aims to determine the description of scientific attitudes of fourth grade students of SD Inpres Ana Gowa and SD Negeri Buttono K. This research is a survey research with data analysis using descriptive statistics. The population in this study were all fourth grade students of Ana Gowa Inpres Elementary School and SD Negeri Buttono K. The sampling technique used was simple random sampling. The sample in this study were students of class IVB and IVC of SD Inpres Ana Gowa and students of class IVA and IVB of SD Negeri Tombolo K with a total sample of 124 students. Data collection techniques using a scientific attitude questionnaire. The results showed that students' scientific attitudes had the same average score. The indicators of scientific attitudes that had the highest average scores were attitudes prioritizing data or facts with a percentage of 63.50% and the lowest scientific attitude indicator scores were critical thinking attitudes with a percentage of 62.20%. This shows that students' scientific attitudes still need to be developed in the learning process so that it affects cognitive learning outcomes and especially affective learning outcomes in science learning. Keywords: Scientific attitudes, affective learning outcomes
Laju Pengurangan Kadar Vitamin C Selama Penyimpanan Buah Naga (Hyloceres Undatus)
Authors: Asmawati A. , Karim Abd. , Iman Ilham Nur
Published: October 2022

Penelitian ini bertujuan untuk mengetahui laju pengurangan kadar vitamin C selama penyimpanan buah naga  putih (Hylocereus Undatus). Eksperimen ini dilakukan dengan mengetahui besarnya penurunan kadar vitamin C selama penyimpanan buah naga  putih dengan metode iodimetri (titrasi langsung). Hasil penelitian menunjukkan kadar vitamin C buah naga  putih pada hari ke 5 adalah 29,406 mg/100 gram, pada hari ke 10 adalah 26,591 mg/100 gram, pada hari ke 15 adalah 19,594 mg/100 gram, pada hari ke 20 adalah 16,847 mg/100 gram, pada hari ke 25 adalah13,157mg/100 gram. Berdasarkan kadar vitamin C tersebut, maka diperoleh persamaan garis dengan nilai  dan membuktikan kadar vitamin C buah naga putih adalah orde satu.Kata kunci: Laju pengurangan, Buah naga  putih, Iodometri This study aims to determine levels of vitamin C and white dragon fruit (Hylocereus Undatus). The experiment was conducted with the determination of vitamin C with iodimetric method (direct titration). The results showed levels of vitamin C and white dragon fruit on day 5 is 29.406, on day 10 was 26.591, on day 15 is 19.594, on day 20 is 16.847, on day 25 is 13.157. Based on the levels of vitamin C, then obtained a reduction rate of 0.4385 x 10-1 which proved levels of vitamin C and white dragon fruit is first order.Keywords: The rate of reduction, white dragon fruit (Hylocereusundatus), iodometry
Pembelajaran Generatif Media Barbek Terintegrasi PPK terhadap Pemahaman Konsep dan Komunikasi Matematis
Authors: Asdar A. , Fatimah F. , Nurhidayah N.
Published: October 2022

Penelitian ini bertujuan untuk melihat pengaruh penerapan model pembelajaran generatif dengan media barang bekas terhadap kemampuan pemahaman konsep dan komunikasi matematis siswa kelas V SDN 007 Sidodadi. Jenis penelitian yang digunakan dalam penelitian ini yatiu pra ekperiman. Instrumen yang digunakan dalam penelitian ini yaitu tes pemahaman konsep dan kemampuan komunikasi matematis siswa. Adapun teknik analisis data yang digunakan dalam penelitian ini yaitu uji one sample t-tes dengan uji prasyarat yaitu melakukan uji normalitas. Hasil yang diperoleh dari pengujian hipotesis yaitu sig. 0.000 < 0,05 sehingga H0 tolak. Sehingga dapat disimpulkan bahwa hasil dari penelitian ini menunjukkan terdapat pengaruh penerapan model pembelajran generatif dengan media barang bekas terintegrasi PPK terhadap kemampuan pemahaman konsep dan komunikasi matematis siswa.Kata Kunci: Model Pembelajaran Generatif, Media Barang Bekas, PPK, Pemahaman Konsep, Komunikasi Matematis The study aimed to see the implementation of the generative learning model with the media used goods to the ability to understand the concept and communication of mathematics class V students at SDN 007 Sidodadi. The type of research used in this study is pre-experiment. The instrument used in this research is the concept of understanding tests and the mathematical communication skills of students. The data analysis technique used in this research is one sample T-test test with a prerequisite test is to test normality. The results obtained from the hypothesis testing are sig. 0.000 < 0.05 so that H0 rejected. It concluded that the results of this research show there was an influence in implementing the generative model of defense with the medium of second-hand goods integrated PPK to the ability to understand the concept and communication of students mathematically.Keywords: Generative Learning Model, Media used goods, PPK, concept understanding, mathematical communication
Studi Pendahuluan Analisis Ukuran Partikel CuAl2O4 Berdasarkan Difraktogram Sinar-X
Authors: Joris Shielda Natalia , Rosidah Yuli Ainun
Published: October 2022

Penelitian pendahuluan analisis ukuran partikel CuAl2O4 dilakukan untuk mengetahui probabilitas menghasilkan nanopartikel ini dalam sistem air menggunakan teknik sol-gel. Tembaga nitrat, aluminium nitrat, dan asam sitrat digunakan sebagai bahan prekursor. Proses pembentukan senyawa ini diawali dengan kompleks prekursor dan melibatkan intermediet stabil yang homogen. Struktur nanopartikel CuAl2O4 terjadi ketika semua prekursor dikalsinasi pada 700 °C di tungku selama satu jam. Produk dikarakterisasi dengan menggunakan metode difraksi sinar-X. Penentuan ukuran partikel dihitung dengan metode Hukum Scherrer diperoleh hasil sebesar 9,56 nm.Kata kunci: Nanopartikel, CuAl2O4, sol-gel, Hukum Scherrer, sinar-X  Preliminary research on CuAl2O4 particle size analysis was conducted to determine the probability of synthesizing these nanoparticles in water system by using the sol-gel technique. Precursors materials which have been used i.e Copper nitrate, aluminium nitrate, and citric acid. This technique starts from the precursor complex, and involves the formation of homogeneous stable intermediates. The structure of CuAl2O4 nanoparticle occurred when all precursors were calcinated at 700 °C at the furnace for an hour. The product was characterized by using X-ray diffraction method. The particle size was measured by Scherrer Law's and it showed to be  9,56 nm.Keywords: Nanoparticle, CuAl2O4, sol-gel, Scherrer Law, X-ray