bluuebunny/crossref_metadata_2025 huggingface dataset:
O PAPEL DA EDUCAÇÃO NO DESENVOLVIMENTO DA CRIATIVIDADE
Authors: Silva Geisa Katiane da , (BRA) Stela Maris Sanmartin
Published: August 2024

O presente artigo explora as teorias de Guilford, Torrance e Amabile sobre a criatividade, destacando a importância do pensamento divergente na concepção psicológica da criatividade. Guilford enfatiza a sensibilidade para identificar problemas como
uma característica crucial de pessoas criativas. Torrance, considerado o pai da pesquisa em criatividade, destaca a interação de
habilidades, motivações e estados na resolução de problemas. Amabile contribui com uma teoria componencial, integrando
habilidades de domínio, processos criativos e motivação pessoal. O texto ressalta a relevância da educação na promoção da
criatividade, conforme refletido na Base Nacional Comum Curricular (BNCC). Estratégias pedagógicas, como ensino flexível e adaptativo, metodologias indiretas e estímulo à imaginação, são discutidas por De La Torre como impulsionadoras da
criatividade na educação. A interação positiva entre professor e aluno é destacada como essencial para estimular a criatividade
no ambiente escolar. O texto conclui enfatizando a necessidade de considerar não apenas os resultados, mas todo o processo
na aplicação de estratégias criativas na educação.
Análise da sustentabilidade empresarial sob a perspectiva das pequenas empresas da região Oeste Paulista
Authors: Martins Geovana Benvenuto , Silva Tauany Gabriely Bistaffa , Endo Gustavo Yuho , Carvalho Leonardo de , Kato-Cruz Érika Mayumi
Published: August 2024

A gestão sustentável é um tema de crescente relevância devido ao aumento das preocupações. Assim destacamos a importância de compreender as abordagens sustentáveis das pequenas empresas e quais os desafios que enfrentam na busca por práticas mais responsáveis. Nesse sentido, o estudo teve como objetivo analisar as empresas de pequeno porte da região do Oeste Paulista sob a perspectiva da sustentabilidade. A presente pesquisa é qualitativa e exploratória; para a coleta de dados realizou entrevistas semiestruturada; os participantes da pesquisa são gestores de empresas de pequeno porte na região Oeste Paulista, para analisar as entrevistas, se utilizou da análise de conteúdo. Os resultados indicaram que as empresas têm um conhecimento limitado sobre sustentabilidade, com foco na redução de custos. As práticas sustentáveis mais comuns incluem a geração de energia solar e a reciclagem de materiais. Todas as empresas consideraram os aspectos financeiros como principal barreira para a adoção de práticas sustentáveis. Além disso, as empresas não percebem impactos sociais significativos e não adotam práticas de responsabilidade social. O presente estudo apontou que as pequenas empresas da região do Oeste Paulista estão cientes da importância da sustentabilidade, porém enfrentam desafios financeiros para a implementação de práticas sustentáveis.
Análise de governança corporativa no segmento de previdência complementar
Authors: Costa Arthur Lima da , Oliveira Elis Regina de , Paranaíba Alexandre de Carvalho , Ferreira Neto Brasilino José
Published: August 2024

As certificações de autorregulação em governança corporativa e de investimentos tem papel relevante para as Entidades Fechadas de Previdência Complementar. Nessa direção, o presente artigo teve por objetivo comparar indicadores de desempenho de gestão de entidades de previdência, propostos pela ANCEP, considerando dois grupos com e sem certificações em autorregulação em governança corporativa e de autorregulação em governança em investimentos, no período de 2020 a 2022. As técnicas estatísticas aplicadas foram pesquisa quantitativa, descritiva e documental, com comparação das medianas por meio do teste de Mann-Whitney. Como principais resultados, verificou-se que as certificações não podem ser relacionadas às diferenças dos indicadores de desempenho de alocação dos investimentos; capacidade de honrar pagamentos das provisões matemáticas por meio do patrimônio de cobertura dos planos, e de rentabilidade, pois não foram significativas. Este estudo amplia a literatura ao avaliar se as certificações de autorregulação em governança corporativa e de governança em investimentos afetam os indicadores de desempenho de gestão e como contribuição prática evidencia os resultados dos indicadores de desempenho aos stakeholders.
Pesquisa sobre a utilização das estratégias competitivas genéricas por parte de pequenas e médias empresas na região sul do Brasil.
Authors: Goulart Alexandre Prado
Published: August 2024

A importância da estratégia empresarial para o mundo dos negócios está ligada ao crescimento no nível de exigências das empresas, que buscam cada vez mais embasamento para orientar suas ações, proteger sua posição no mercado e prosperar. O trabalho refere-se a esse macro ambiente, objetivando verificar os casos de uso com base nos registros do CRA RS referente ao período de 2014 a 2016. Propõe-se a realizar uma pesquisa sobre a utilização das estratégias competitivas genéricas por parte de pequenas e médias empresas na região sul do Brasil
A ATUAÇÃO DA PSICOLOGIA NA DESCONSTRUÇÃO DO RACISMO E NA PROMOÇÃO DE IGUALDADE RACIAL
Authors: Oliveira Thainara Magalhães de
Published: August 2024

Esse estudo tem por relevância contribuir com as demais pesquisas realizadas acerca do tema, apresentando novas perspectivas sobre o fazer psicológico diante da desconstrução do racismo, um conceito edificado ao longo da história. Optou-se por fazer utilização da revisão integrativa de literatura como metodologia de pesquisa, trata-se do desenvolvimento de modos dentro do contexto científico de pesquisa embasado, capaz de delinear etapas metodológicas para os profissionais e, por meio destas, conceder a utilização de evidências em estudos.
Hans Jonas y Günther Anders: La condición judía enfrentada a situaciones límite
Authors: Calderón Melnick Paula Andrea
Published: August 2024

En este trabajo reflexionaremos sobre los planteamientos que efectuaron Jonas y Anders en relación con el concepto de condi­ción judía. Asimismo, ahondaremos en los puntos de encuentro y desencuentro entre esta noción y la concepción de situación lí­mite jaspersiana en el periodo que rodea el Holocausto. Para ello nos basaremos en los textos de Jonas El concepto de Dios después de Auschwitz: una voz judía, Memorias y El principio de respon­sabilidad. Asimismo, en los escritos de Anders, La batalla de las cerezas. Mi historia de amor con Hannah Arendt y Nosotros los hijos de Eichmann. Carta abierta a Klaus Eichmann.
La representación política magisterial y la posición institucional del canciller del Reich en la obra de Hermann Heller
Authors: Fraile Nicolás
Published: August 2024

A pesar del reconocimiento en torno a las contribuciones de Hermann Heller a la teoría de la democracia, la literatura espe­cializada se concentró mayormente en las reflexiones que este autor dedicó a los componentes sociales de aquel régimen y prescindió de sus consideraciones sobre la democracia política. Con vistas a subsanar esta vacancia, en este artículo nos propo­nemos ganar claridad sobre un tópico de gran relevancia para esta comprensión del régimen democrático: el de la represen­tación política. A estos fines, proponemos un trabajo doble. De una parte, examinar la postura que este autor tomó en el debate alemán sobre representación política, expresada en su concep­ción de la “representación magisterial”. De otra parte, indagar la articulación que Heller estableció entre aquel tipo de represen­tación y la posición institucional del canciller del Reich.
¿Cómo sortear el conflicto moral en una ética empirista basada en emociones?
Authors: Ramírez Rosemary Bruna
Published: August 2024

El artículo comienza explicando la teoría sentimentalista de Prinz, que se inspira en la filosofía de Hume, y argumenta que los conceptos morales son formados por experiencias emocionales. Prinz sostiene que estos conceptos, llamados proxytipos, son maleables y se adaptan según el contexto cultural y social. Luego, se analiza cómo la teoría de la “realidad social” de Searle complementa la propuesta de Prinz. Searle argumenta que las realidades sociales son productos de la intencionalidad colectiva y que poseen poderes deontológicos que regulan la conducta. También se incorpora la perspectiva de Mar Cabezas sobre el criterio de la segunda persona, que enfatiza el reconocimiento mutuo y el respeto en las relaciones morales. El artículo demuestra cómo la moral puede ser subjetiva y relativa al contexto, pero, a la vez, formar parte de un código ético compartido que permite la organización social. Se destaca que el relativismo no implica la aceptación indiscriminada de todos los juicios morales, ya que existen criterios universales para evaluar acciones moralmente relevantes, como el daño causado a víctimas no dispuestas.
DESAFIOS E PERSPECTIVAS DO TREINAMENTO MUSCULAR INSPIRATÓRIO NAS DCVS: DO DESMAME VENTILATÓRIO À REABILITAÇÃO AMBULATORIAL
Authors: Salvador Rocco Isadora ,   Escola Paulista de Medicina da Universidade Federal de São Paulo (EPM/UNIFESP). Programa de Pós-Graduação em Cardiologia e Disciplina de Cirurgia Cardiovascular., Boemo Jaenisch Rodrigo , Fernandes Costa Ferreira Bruno , Silva Reis Michel , Floriano Rafael , Papa Valeria , dos Santos Alves Vera Lúcia , Guizilini Solange , Trimer Renata ,   Universidade Federal de Santa Maria. Departamento de Fisioterapia e Reabilitação. Programa de Pós-Graduação em Ciências do Movimento e Reabilitação,   Irmandade da Santa Casa de Misericórdia de São Paulo. Serviço de Fisioterapia. Faculdade de Ciências Médicas,   Universidade Federal do Rio de Janeiro (UFRJ). Faculdade de Fisioterapia. Grupo de Pesquisa em Avaliação e Reabilitação cardiorrespiratória (GECARE),   Universidade Federal do Rio de Janeiro (UFRJ). Faculdade de Fisioterapia. Grupo de Pesquisa em Avaliação e Reabilitação cardiorrespiratória (GECARE),   Universidade de São Paulo (FMRP-USP). Hospital das Clinicas da Faculdade de Medicina de Ribeirão Preto. Laboratório de Fisiologia do Exercício da Divisão de Cardiologia,   Irmandade da Santa Casa de Misericórdia de São Paulo. Serviço de Fisioterapia. Faculdade de Ciências Médicas,   Escola Paulista de Medicina da Universidade Federal de São Paulo (EPM/UNIFESP). Programa de Pós-Graduação em Cardiologia e Disciplina de Cirurgia Cardiovascular.,   Universidade Federal de São Carlos (UFSCAR). Departamento de Fisioterapia
Published: August 2024

A reabilitação cardiovascular (RC) baseada em exercícios melhora a capacidade funcional e qualidade de vida de pacientes com doença cardiovascular (DCVs). O componente central da RC é o treinamento aeróbico (TA). No entanto, embora essa modalidade possa diminuir os sintomas de dispneia, o TA isolado não é capaz de explorar todo o potencial de melhora da capacidade ventilatória. Estudos robustos indicam que a combinação do treinamento muscular inspiratório (TMI) amplifica os benefícios já estabelecidos do TA em pacientes cardiopatas. O treinamento da musculatura ventilatória é crucial em programas de RC, demonstrando consistentemente melhorias nas queixas de dispneia e fadiga de membros inferiores. Assim, o TMI é capaz de aumentar a tolerância aos esforços, prevenir complicações pulmonares pós-cirúrgicas e reduzir eventos clínicos adversos. Esta revisão visa explorar as diversas aplicações do TMI em DCVs, oferecendo um guia prático para sua compreensão teórica e implementação eficaz na RC.
Microplastics in seagrass ecosystems: A review of fate and impacts
Authors: Tang Kuok Ho Daniel
Published: August 2024

Microplastics have been detected in seagrass ecosystems, raising concerns about their potential impacts on the ecological functions of seagrasses. Seagrass meadows are biodiversity hotspots as they provide habitats to diverse fish and invertebrates. They also play a crucial role in nutrient cycling, capturing carbon, and buffering coastal erosion. This review aims to present the fate of microplastics in seagrass ecosystems and their impacts on the ecosystems. A total of 66 scientific articles have been reviewed. The review highlights that seagrass meadows intercept microplastics, though the relevant results are currently inconclusive. Some microplastics attach to the epiphytes on seagrass blades or the seagrass blades while some accumulate in the seagrass sediment, causing enrichment of microplastics in seagrass meadows. Nonetheless, a few studies did not observe such intercepting effects. Microplastic enrichment, where observed, could be due to near-bed turbulent kinetic energy that entraps denser sinking microplastics. Microplastics can directly affect seagrasses by blocking light and nutrient transfer, affecting their shoot or leaf turnover, degenerating root and causing oxidative stress. However, a study on Zostera marina L. found that short-term exposure to microplastics did not significantly impact bicarbonate utilization and photosynthetic efficiency. Microplastic additives, particularly bisphenol A reduced chlorophyll and caused peroxide accumulation in Cymodocea nodosa. The presence of biodegradable plastics in the sediment might alter the distribution and interaction of seagrass species. Seagrasses could be affected indirectly through the potential impacts of microplastics on seagrass epiphytes but more studies are needed to confirm this. Desorption of pollutants sorbed on microplastics could negatively affect seagrass meadows. Further research could focus on the impacts of microplastic accumulation on the seagrass ecosystem and the processes therein, including nutrient cycling. Disintegration-oriented techniques and alternatives to conventional plastics are two strategies to mitigate microplastic prevalence in the environment.
Analisis Risiko Kecelakaan Kerja pada Proyek Gedung TPQ 2 Lantai menggunakan Metode Bowtie
Authors: Irawan Ananda , Prafitasiwi Avisha Gita
Published: August 2024

Risiko merupakan kemungkinan dampak kerugian yang dapat timbul dari sumber bahaya tertentu yang terjadi pada proyek konstruksi. Data yang didapat digunakan untuk mengidentifikasi risiko kecelakaan kerja yang paling sering terjadi dimulai dengan penilaian risiko yang nantinya akan mendapat matriks analisa risiko. Proses pengambilan sampling dibagi menjadi 2 yaitu menggunakan sampling purposive dan snowball untuk memperoleh variabel risiko yang relevan dari kuisioner pendahuluan yang dibagikan kepada expertise. Metode yang dipakai untuk mengidentifikasi sumber terjadinya kecelakaan kerja yaitu menggunakan Metode Bowtie. Hasil dari penelitian tugas akhir ini adalah mengetahui risiko kecelakaan kerja yang paling dominan yaitu, pekerjaan pemasangan keramik lantai dan dinding dengan bahaya penggunaan peralatan pemotong (gerinda) dan potensi risiko pekerja menghirup debu keramik. Penyebab risiko kecelakaan kerja yang paling sering terjadi berdasarkan metode yang digunakan yaitu bowtie adalah pekerja tidak memakai masker pada saat pemotongan keramik. Respon risiko berupa penyediaan APD yang dibutuhkan pekerja, serta menerapkan atau memberlakukan kepada setiap pekerja wajib menggunakan APD saat melaksanakan pekerjaan.
Adsorption Cu2+ Metal Ion Of Pectin From “Tongka Langit” Banana’s Crust (Musa Speices Van Balbisiana)
Authors: Sutapa I Wayan , Siahay Victor P.D. , Tanasale Matheis F.J.D.P.
Published: August 2024

The adsorption Cu2+ metal ion of pectin from "tongka langit" bananas crust (Musa Speices van balbisiana) has been done. Pectin was obtained from extraction "tongka langit" bananas crust with HCl at temperature 90 oC during 4 hours. Pectin was produced 9.49 grams (10.41%). Identification functional group of pectin before and after adsorption use FT-IR spectrophotometer and defractometer XRD while Cu2+ metal adsorption result was analized with using AAS. Adsorption Cu2+ metal was followed adsorption isotherm Freundlich with KF value = 4.33 mg/g and n value = 0.86.
Analisys Of Lead (Pb) And Chromium (Cr) Content In The Roots Of Seagrass (Enhalus Acoroides) In Waters Of Waai And Tulehu Village Central Maluku Regency
Authors: Male Yusthinus T , Sunarti Sunarti , Nunumete Neti
Published: August 2024

The research has been done with the aim to determine the content of heavy metals Pb  and Cr on the roots of seagrasses (Enhalus acoroides) by using Spektrofotometry Atomic Absorption (SSA). Samples have been taken from the waters of Waai and Tulehu village. The result show that the content of Pb on the roots of seagrasses in the waters of Waai village and Tulehu village is 26,262 mg/Kg; 18,491mg/Kg; 16,272 mg/Kg dan 12,272 mg/Kg. While the content of Cr on the roots of seagrasses in the waters of Waai village ang Tulehu village 33,066 mg/Kg; 7,752 mg/Kg; 109,535 mg/Kg; 22,464 mg/Kg. The result of this study can be used as a reference for the claim that the roots of seagrasses in the Waters of Waai village and Tulehu village contain metals Pb and Cr quite high.
Optimation Transesterification Reaction Conditions on Biodiesel Production From Beef Tallow
Authors: Rosmawaty Rosmawaty , Bandjar Adriani , Gunoroso Suntoro
Published: August 2024

Biodiesel synthesis has been done from beef tallow through two step, esterification and transesterification reactions. Esterification process is done by using  H2SO4 1M as a catalyst, methanol 1:9, temperature of 60-65Â°C, and for 3 hours. After separated between methanol and trigyceride, then proceed to the process of transesterification. To obtain the optimum reaction conditions then used some transesterification process variables,  there are: the weight percentage catalyst of KOH between 0.1, 0.5, 1; 1.5, and 2%, the reaction time of 1-5 hours and the reaction temperature between 50 -70 oC. Optimum conditions of transesterification reaction for the synthesis of biodiesel derived from beef tallow with KOH catalyst is as follows: the weight percentage of 1% KOH catalyst, the reaction time of 3 hours and the reaction temperature of 65 oC. The results of physical testing of biodiesel fuel by ASTM method includes specific density of 0.8675 g/cm3, kinematic viscosity of 4.971 mm2/s, flash point of 134.5Â°C, pour point of 27Â°C, the Conradson carbon residue of 0.018%, and the copper corrosion-pieces of 1B.
Synthesis and Characterization of The MCM-48 and Modified NH2
Authors: Sari Andi Y.P. , Taba Paulina , Budi Prastawa
Published: August 2024

This research aims to synthesize and characterize MCM-48 modified with the group-NH2. Synthesis of MCM-48 and its modification by NH2 conducted by Ryoo  methods where is the salt of Ludox HS40 solution mixed with NaOH solution then heated, followed by making mixture of CTAB and Triton X-100. The resulting gel mixture is heated at temperature of 100 Â°C for 24 hours. The reaction mixture added 30% acetic acid until  pH 10. Then the mixture was heated at 100 Â°C for 24 hours then cooled at room temperature. MCM-48 mesoporous silica that has formed was filtered, washed with distilled water and dried at 120 Â°C. MCM-48 mesoporous silica characterized using XRD and FTIR. Modification of MCM-48-NH2 was done by adding 3-APTES into mesoporous silica.  XRD analysis results showed that the characteristic peaks at 2 theta 2.4o have Miller indices 211and several peaks with low intensity. These peaks are typical peak for MCM-48. By FTIR showed the specific areas observed for organic molecules (surfactant) in MCM-48 synthesized; CH span (2800-3100 cm-1) and CH bending (1400 to 1500 cm-1). C-H bending vibration was observed in 1645; 1512 and 1481 cm-1. The success of modified MCM-48-NH2 was shown by the appearance of two absorption bands at wave numbers 3368 and 3424 cm-1 which indicate the presence of a primary amine or an amino group (-NH2) in the mesoporous channel
Analisis Logam Berat Cd Dalam Alga Eucheuma cottoni Di Perairan Kabupaten Bantaeng
Authors: Teheni Muhammad T. , La Nafie Nursiah , Dali Seniwati
Published: August 2024

Algae is a plant which life in the marine with a lot of diversification such as: single and multi-cellular. Commonly, it contains chlorophyll without stem and roots.  A species of algae in Indonesia which has high economic value is Eucheuma cottoni. It is cultured in Bantaeng as the central production of algae in South Sulawesi. The aim of this research is to know the concentration of heavy metals Cadmium in algae at region Bantaeng coastal. Concentration of cadmium was determined by atomic absorption spectrophotometer (AAS). This analysis was done by destruction process using concentrated HNO3. Sampling was done at 6 different location, they are: Nipa-nipa, Bakara, Boroloe, Tapaloe, Baruga village and Baruga from north to south. The experiment result show that the highest concentration of Cd is in Nipa-nipa village, with 0.2920 ppm and the lowest in Baruga village is 0.1824 ppm. The concentration of Cd in algae Eucheuma cottoni in those 6 different location had been more than limited which had been determined by the decision of national of environmental ministry  number 51 year 2004, they are 0.01 and 0.05 ppm.
Aktivitas Antioksidan dan Fitokimia dari Ekstrak Etil Asetat Pucuk Idat (Cratoxylum glaucum)
Authors: Mahardika Robby Gus , Roanisca Occa
Published: August 2024

Neutralizing free radicals can use both synthetic and natural antioxidant compounds. Although synthetic antioxidant compounds are more active, but lately the use of synthetic antioxidants is being reduced because they are reported to have carcinogenic side effects. Natural antioxidant compounds found in plants are phenolic groups such as flavonoids, tannins, xanthones, and anthraquinones. This compound is widely found in the genus Cratoxylum where one of the species is pucuk idat (Cratoxylum glaucum). Pucuk idat are often used by people of Bangka as a flavoring dish and are believed to be traditional medicine to facilitate breastfeeding, tighten skin, treat fever, cough, and diarrhea. The increasing of antioxidants needs and lots efficacy of pucuk idat, hence this study aims to determine the antioxidant activity of ethyl acetate extract Cratoxylum glaucum. The antioxidant test in this study used the DPPH (Diphenylpicrylhydrazyl) method and vitamin C as a positive control. The results of this study indicate that the extract of ethyl acetate Cratoxylum glaucum has strong antioxidant activity with value IC50 32,213 Î¼g / mL. Phytochemical content itself includes hydroquinone phenols (tannins), flavonoids, and steroids. This shows that ethyl acetate extract Cratoxylum glaucum can be used as natural antioxidant.
Uji Aktivitas Antioksidan Pada Ekstrak Buah Kawista (Limonia Acidissima) Menggunakan Spektrofotometer UV-Vis
Authors: Rustiah Waode , Umriani Nur
Published: August 2024

Antioxidant activity test has been done on kawista fruit. This study aims to determine the antioxidant activity of kawista based on the test using UV-Vis spectrophotometer conducted wavelength (l) 516 nm. The kawista fruit is extracted by reflux using methanol solvent. The extracts were made at concentrations of 50 ppm, 100 ppm, 150 ppm, 200 ppm and 250 ppm. The results showed that the antioxidant activity based on IC50 values obtained on kawista fruit extract samples had a concentration of 1275 mg / ml. The results obtained are at the level of IC50> 150 mg/ml, this indicates that the kawista fruit have weak antioxidant ability.
Analisis Kandungan Zat besi (Fe) Pada Daun Kelor (Moringa oleifera Lam.) Yang Tumbuh dengan Ketinggian Berbeda di Daerah Kota Baubau
Authors: Hamzah Hasty , Yusuf Nur Rahmah
Published: August 2024

Moringa oleifera Lam. is ones of the multipurpose plants. All parts of the plants are useful to human life and efficacious as a medicine. Moringa oleifera Lam can grow in the lowlands and highlands to an altitude of 1000 masl. This study was conducted to determine the levels of iron (Fe) in Moringa oleifera Lam leaves that grew at different heights using Atomic Absorption Spectroscopy (AAS) the results shows the amount of iron (Fe) in the lowlands of 14 masl (Wameo Village) is 6.28 mg per 100 g of Moringa leaf, medium plains 58 masl (Kantalai Village) is 5.57 mg per 100 g of sample while in the highlands 318 masl (Kaisabu Subdistrict) is 3.86 mg per 100 g of sample. Factors that influence the amount of iron content in Moringa oleifera Lam leaves are height which further affects the intensity of sunlight, humidity. Other factors can be caused by soil conditions (texture, moisture, nutrient, and pH).
Studi Variasi Konsentrasi NaOH dan H2SO4 Untuk Memurnikan Silika Dari Abu Sekam Padi Sebagai Adsorben Ion Logam Pb2+ dan Cu2+
Authors: Harimu La , Rudi La , Haetami Aceng , Santoso Giswa Ayu Pratiwi , . Asriyanti
Published: August 2024

A study of variations in the concentration of NaOH and H2SO4 to purify silica from rice husk ash and its application as adsorbent of Pb2+ and Cu2+ Metal Ions. The NaOH concentrations used were 8%, 9%, 10%, 11%, 12% and 13% and H2SO4 concentrations were 5.4%, 8.16%, 10.88%, and 13.61%. The process of adsorption of Pb2+ and Cu2+ metal ions was carried out at pH (3, 4, 5, 6) and silica masses. The results showed the silica yield obtained in the form of white powder. The highest silica content at 12% NaOH concentration of 41.81% with a purity of 89.09% and H2SO4 concentration is 10.88% at 65.39% with a purity of 94.94% initial content 86.02%. The results of surface structure characterization using Scanning Electron Microscope (SEM) average size of particle diameter was 0.030 Âµm. Optimal adsorption process of Pb2+ and Cu2+ metal ions using silica from rice husk occurred at pH 6 and the adsorbent mass was 0.3 gram, the adsorption efficiency was 98% and 86.25% respectively with adsorption capacity of 0.96 mg/g for metal Pb2+ and 0.83 mg/g for Cu2+ metals.
Penambatan Molekuler α, β, dan γ-mangostin Sebagai Inhibitor α-amilase Pankreas Manusia
Authors: Gaspersz Nelson , Sohilait Mario Rowan
Published: August 2024

The in silico studies of interactions between the human pancreatic α-amylase (HPA) enzyme to α, β, and γ-mangostin ligands has been carried out using the molecular docking method. Ligands α, β, and γ-mangostin interacting through the formation of hydrogen and van der waals bonds to residues on the enzyme active side. The α-mangostin ligands resulting seven hydrogen and six van der waals bonds with the residues involved were Trp59, Gln63, Trp96, Thr163, Thr164, Ala198, His201, Glu233, and Asp300. β-mangostin resulting five hydrogen and eight van der waals bonds with residues involved were Gln63, Trp96, Thr163, Thr164, Arg195, Asp197, His201, Glu233, Asp300, and His305; while γ-mangostin forms nine hydrogen and five van der waals bonds with residues involved were Trp59, Gln63, Trp96, Thr163, Asp197, Ala198, His201, Glu233, and Asp300. The binding affinity of α, β, and γ-mangostin to the HPA enzyme obtained were -7.0; -6.6; and -7.4 kcal/mol with root mean square deviation (RMSD) value were 1,850; 1,956; and 1,811 Å respectively. Ligand γ-mangostin has potential activity as an inhibitor of HPA enzyme due to the stabilization of the complexes formation with lower binding affinity (validated with RMSD value) when compared to α and β-mangostin.
Penentuan Model Adsorpsi Metil Merah pada Karbon Aktif berbasis Torefaksi Arang Batubara
Authors: Indarto Antonius , Hartanto Yansen , Putranto Aditya , Bunaidi Rendi
Published: August 2024

The Rate Determining Step (RDS) in adsorption proses plays a key role in order to understand the correct adsoption mechanism. In this experiment, a simple method used for distinguishing the RDS of liquid adsorption on solid adsorben was studied by an experiment based on Shrinking-Core Diffusion-based Model (SCM). RDS determination was done by comparing experimental data of two SCM Models: (1) Pore-Surface Model Diffusion (PSDM) and (2) Film-Pore Diffusion Model (FPDM). The adsorption of methylene blue by activated carbon obtained from Jatropha curcas L. was used as a case study. The result of experiment by three variated parameters: initial concentration (C0), pH, and type of adsorben shows that PSDM has more accuration compared to FPDM in representating the characterstic of mass transport of metil red adsorption on activated carbon.
Senyawa Triterpenoid dari Ekstrak N-heksana Daun Kelor (Moringa oleifera Lamk.) dan Uji Aktivitas Antibakteri Terhadap Staphylococcus aureus dan Escherichia coli
Authors: Salimi Yuszda , Bialangi Nurhayati , Abdulkadir Widysusanti , Parulian Boima Ramses
Published: August 2024

Kelor plant (Moringa oleifera Lamk) is a plant that grows naturally in a tropical climate. During this decoction of pirdot leaves plants are used by the people as antimicroba. The purpose of this study was to isolate triterpenoid compound from ethyl acetate extract of kelor leaves. The sample extraction was performed by maceration method using methanol as a solvent. Fractionation used n-hexana and etil asetat as a solvent. The separation and purification of the compound was carried out by column chromatography method followed by stain pattern analysis with thin layer chromatography (TLC). Characterization and elucidation of pure compound structures using UV, IR, 1H-NMR, 12C-NMR, HSQC, HMBC, and 1H-1H COSY, and compared with various literatures. Based on the result of structural elusidation, the pure isolate obtained is a pentacyclic triterpenoid group compound with the molecular formula C30H50O and the name of 3-hydroxy, 20 (29) -en, lupenol. The triterpenoid compound of 3-hidroxy, 20 (29) -en, lupenol is the first isolated and reported from leaves of kelor plant.
Identifikasi Batuan PAF, NAF dan UNCERTAIN dengan Menggunakan Metode NTAPP Pada Area PT. Trubaindo Coal Mining, Melak-Kalimantan Timur
Authors: Irviansyah Alfian , Sitorus Saibun , Panggabean Aman Sentosa
Published: August 2024

The research about identification of PAF, NAF and uncertain rock using NTAPP method in the PT. Trubaindo Coal Mining has been done. This research was conducted as an effort to control the potential for the formation of acid mine drainage, with identifying the types of mine rocks using certain testing methods. Some important parameters such as Total Sulfur Level, Slurry pH, Total Actual Acidity (TAA), Chromium Reducible Sulfur (CRS) and Acid Neutralizing Capacity (ANC) using the NTAPP method on mine rocks have been determined to identify mining rock category categories. Based on the results of tests on 101 samples, 63 samples were identified included in the category of rocks that are not NAF (Slurry pH value = 4.1 - 8.9; Total Sulfur = 0.01-0.60 %; CRS = 0.01-0.10 % and NTAPP = 0.030-0.959 %), 38 samples were classified as PAF (pH Slurry = 2.9-7.9; Total Sulfur = 0.01-5.10 %; CRS = 0.11-2.04 % and NTAPP = 0.053-4.571 %), and no sample was included in the uncertainty category.
Sintesis Tetrapeptida Linear (DPAP) Menggunakan Metode Sintesis Peptida Fasa Padat (SPPS) Dan Aktivitas Insektisidanya Terhadap Ulat Krop Kubis
Authors: Yanti Eka Fitri , Maharani Rani
Published: August 2024

Crop cabbage worm (Crocidolomia pavonana) is one of the pests that has a bad effect on the cabbage production in Indonesia. One of the efforts that has been applied to control this pest is by using bayrusil. However, the bayrusil can cause negative effects such as poisoning and environmentally polluting effects. To prevent the undesired effects, it has been developed the use of environmentally friendly insecticide and one of them is the use of insecticidal peptide. Tripsin-modulating oostatic factor (TMOF) and ist analogues is one of the peptides that has an insecticidal activity. The aim of this research is to synthesise a linear tetrapeptide (DPAP) an analogues of TMOF and to test insecticidal activities against crop cabbage worm.  A DPAP has been synthesised by Solid Phase Peptide Synthesis on 2-chlorotrytil chloride resin. Fmoc strategy was applied on the synthesis and a combination DIC/Oxime was employed in the coupling reaction.The tetrapeptidyl resin was cleaved by TFA:water:EDT (90:5:5). The peptide was purified by reverse-phase column chromatography and characterized by TOF ES-MS spectroscopy. A linear peptide was biologically tested towards the C. pavonana, showing percentage of mortality values at 1000 ppm.
Kinetika Reaksi Hidrogenasi Ester Lemak Menjadi Alkohol Lemak Dengan Katalis Tembaga- Mangan
Authors: Gunawan Melia Laniwati , Makertihartha IGBN , Subagjo Subagjo
Published: August 2024

Fatty alcohol (FAOH) can be produced by hydrogenating of fatty acid methyl ester (FAME) using the copper-based catalyst. Copper-Chrom (Cu-Cr) is the best catalyst for high-pressure reaction condition, which is copper (Cu) as the main active component and chrom (Cr) as a promoter. Since Cr is feared to be toxic, one of the best replacement candidates is manganese (Mn). The research aims is to find the kinetic equation of hydrogenation FAME to FAOH using a Cu-Mn commercial catalyst.  FAME with methyl laurate and methyl myristate as the main compounds is used as feedstock. The main products are lauryl alcohol and myristyl alcohol. The reaction was carried out in an isothermal continuous fixed bed reactor under conditions of temperature 220 â€“ 240 oC, pressure 50 bar, and liquid hourly space velocity (LHSV) 5-12.5 hr-1.  The kinetic equation is determined using the power law model. The FAME hydrogenation on copper - manganese catalyst is the half order reaction. The activation energy value is 86.32 kJ/mol and the Arrhenius constant value is 5.87x106  M0.5/s.
Analisis Logam Nikel (Ni) dalam Air Laut dan Persebarannya di Perairan Teluk Kendari, Sulawesi Tenggara
Authors: Wibowo Dwiprayogo , Basri Basri , Adami Aryani , Sumarlin Sumarlin , Rosdiana Rosdiana , Ndibale Wa , Ilham Ilham
Published: August 2024

Pentingnya mengetahui kandungan logam nikel (Ni) dalam air laut dan persebarannya disekitaran Teluk Kendari, Sulawesi Tenggara karena kebolehjadian terjadinya pencemaran limbah domestik dan akumulasi sedimentasi di badan perairan yang terbawa melalui aliran sungai dan drainase perkotaan. Penelitian ini menyajikan beberapa korelasi antara aktivitas keramaian masyarakat dengan tingkat kandungan logam Ni disekitaran Teluk Kendari yang dianalisis menggunakan instrumentasi spektroskopi serapan atom (SSA). Penentuan 5 titik lokasi berbeda dipilih berdasarkan banyaknya kegiatan aktivitas masyarakat. Selanjutnya, sampel diambil masing-masing sebanyak 1 Liter sejauh Â±100 m dari garis pantai yang selanjutnya dianalisis menggunakan instrument SSA. Hasil penelitian menunjukkan bahwa adanya hubungan aktivitas keramaian kegiatan masyarakat terhadap tingginya kandungan logam Ni yang terakumulasi dalam air laut Teluk Kendari. Kandungan logam Ni yang diperoleh bervariasi berturut-turut T1< T4< T3< T2> T5 yaitu 0,047; 0,052; 0,063; 0,068; 0,073. Berdasarkan baku mutu, standar kandungan Ni dalam air laut sebesar 0,05 mg/L, sehingga pada T2, T3, T4, dan T5 dinyatakan telah melebihi ambang batas. Hal ini disebabkan lokasi tersebut maraknya aktivitas masyarakat sehingga kebolehjadian nilai logam Ni juga meningkat. Berdasarkan hasil penelitian ini memberikan informasi terkini terkait wilayah pencemaran lingkungan akibat akumulasi logam berat dan juga bagi masyarakat agar tidak mengkonsumsi ikan yang diperoleh dari Teluk Kendari.
Variation of Iodine Mass and Acetylation Time On Cellulose Acetate Synthesis From Rice Straw
Authors: Umaningrum Dewi , Astuti Maria Dewi , Nurmasari Radna , Hasanuddin Hasanuddin , Mulyasuryani Ani , Mardiana Diah
Published: August 2024

Cellulose acetate is a membrane material that can be used in the sensor field. One source of cellulose acetate is from rice straw. This study aimed to study the effect of iodine mass and acetylation time on cellulose acetate synthesis from rice straw. The initial step is to isolate cellulose from rice straw, followed by cellulose acetate synthesis using iodine catalyst by varying the amount of iodine as much as 0.1-0.3 grams and acetylation time for 1 until 5 hours. The cellulose acetate was characterized using an infrared spectrophotometer, and its viscosity was determined. The result shows that the cellulose 33.63%. The maximum time of cellulose acetate acetylation is 2 hours with a mass of iodine 0.2 g. The yield of cellulose acetate was 14.98%, with an acetyl value of 19.11% and a degree of substitution of 0.89. The cellulose acetate produced has a low viscosity. The FTIR characterization of cellulose acetate shows O-H functional groups at 3333 cm-1, C-H functional groups at â€‹â€‹2897 cm-1, carbonyl functional groups at 1722 cm-1 C-O functional groups at 1029 cm-1 that were identical in cellulose acetate compounds. The amount of iodine and the acetylation time affected the cellulose acetate product.
Concentration Effect of Leaf Extract from Kekara Laut (Canavalia Maritima Thou.) in inhibiting of Staphylococcus Epidermidis Bacteria with a Statistical Science Approach
Authors: Idrus Irman , Kurniawan Fajar , Mustapa Faizal , Wibowo Dwiprayogo
Published: August 2024

Importantly to study the coastal vegetation from Kekara Laut (Canavalia maritima Thou.) to observe the antibacterial agents towards Staphylococcus epidermidis. The purpose of this study to examine the variation concentration effect of an ethanol leaf extract from Canavalia maritima Thou. in inhibiting the growth of S. epiderimidis bacteria. The leaf of Canavalia maritima Thou. was prepared using a physicochemical method to obtain ethanol extract, then varied in several concentrations, namely 5% w/v; 10% w/v; 15% w/v; and 20% w/v. Based on these results, we obtain the ethanol leaf extract can inhibit the growth of S. epidermidis with a concentration of 15% w/v for 24 hours having an inhibition zone of 17.17 mm. The statistical analysis test was very significantly different from all antibacterial tests, the value of F count was 682.1 with F table (3.48), at the level of Î± = 0.05 (3.48) and Î± = 0.01 (5.99), which indicates that H0 is rejected, but using the Variance method in the Newman-Keuls range approach shows that each concentration has a good inhibitory ability. The use of Canavalia maritima Thou. leaf extract in low concentrations can significantly inhibit bacterial growth (bacteriostatic).
Chitosan as a Capping Agent of Silver Nanoparticles
Authors: Badi'ah Hanim Istatik
Published: August 2024

Silver nanoparticles have been developed in many applications because of their optical and reactivity properties. One of the disadvantages of silver nanoparticles is their low level of stability because their surface is easy to aggregate. It is necessary to have other materials such as chitosan as a capping agent on the surface of silver nanoparticles to prevent aggregation. This study aimed to determine the ability of chitosan as a capping agent for silver nanoparticles. The ability of chitosan was evaluated based on the stability test and characterization using a UV-Vis, PSA, and FTIR spectrophotometer. The silver nanoparticles formed producing a yellow color with a wavelength of 401 nm and a size of 13.48 nm. The volume of chitosan that gave optimal results in stabilizing silver nanoparticles was 2.0 mL.
Optimalisasi Media Pembelajaran Berbasis Website: Wordwall.net untuk Kemudahan Interaksi dan Evaluasi Hasil Pembelajaran Siswa
Authors: Sagirani Tri , Wahyuningtyas Nunuk , Wulandari Sri Hariani Eko , Oktaviani
Published: August 2024

Implementasi Kurikulum Merdeka menuntut Guru untuk lebih kreatif mempersiapkan berbagai media pembelajaran. Optimalisasi media berbasis website dalam pembelajaran menjadi sebuah kebutuhan untuk Guru. Program pengabdian kepada masyarakat ini dilakukan untuk menjawab tantangan bagi Guru dan dilaksanakan dalam bentuk pelatihan secara intensif. Sasaran pelaksanaan kegiatan adalah Guru yang ada pada jenjang Pendidikan TK, SD dan SLB di berbagai wilayah/ kota di Jawa Timur. Dalam pelaksanaannya telah dilakukan survey terhadap Guru dan didapatkan bahwa Guru membutuhkan aplikasi bantu lain dari yang biasa digunakan, untuk membangun media pembelajaran yang lebih disukai siswa dan lebih menarik, dan aplikasi yang terpilih adalah wordwall. Aplikasi wordwall menjadi salah satu aplikasi yang dapat digunakan oleh Guru untuk membangun media pembelajaran  yang lebih menyenangkan dan menarik bagi peserta didik. Aplikasi Wordwall ini disajikan berbasis website dan memberi kemudahan Guru dalam melakukan evaluasi hasil belajar siswa. Dari survey terhadap 213 Guru, selanjutnya diseleksi dan terpilih 60 Guru untuk mengikuti pelatihan intensif pemanfaatan aplikasi wordwall. Keberhasilan program ini diukur berdasarkan penilaian dari peserta, bahwa pelaksanaan program berjalan dengan baik, sesuai dengan harapan dan sangat memberikan nilai tambah bagi Guru dalam mengembangkan media pembelajaran, ini terlihat pada nilai rata-rata yang diberikan oleh peserta sebesar 3,77 dari skala 1 sampai 4.
Meningkatkan Penjualan Online UMKM Desa Temuroso Demak dengan Digital Marketing
Authors: Anik Sri , Wasitowati Wasitowati , Gulnoria Revy Amyneva
Published: August 2024

Temuroso is a village in Guntur, Demak, Central Java. Several community members in Temuroso have created entrepreneurs with different types of businesses, namely: fashion, culinary, trade, handicrafts, food, and drinks. Since Covid-19, many domestic and global economic sectors have been affected. The impact of this pandemic is being felt by MSMEs sector. The decline in MSME and cooperative turnover due to COVID-19 is very significant. Therefore, MSME actors in Temuroso need to be given training related to digital marketing so they can market their products online so as to further improve sales performance. The implementation of community service for digital market training in Temuroso was carried out comprehensively, starting from introducing digital marketing through the Shopee marketplace, uploading products, and registering for free shipping. This training was attended by 20 out of 79 UMKM actors, especially those who were very familiar with gadgets and digitalization, guided by competent resource persons. In the digital marketing training, only 20% succeeded in creating an account on the Shopee marketplace and uploading their products, this showed that digital marketing training for business actors (MSMEs) is able to improve sales performance because MSME products are better known to the wider community. Furthermore, this digital marketing training is expected to improve the welfare of MSMEs in Temuroso, Guntur, Demak, Central Java. This digital market training can have an impact on increasing sales and will further improve sales performance and welfare of MSMEs in Temuroso village, Guntur, Demak, Central Java.
Pemberdayaan Kelompok Tani Green House Desa Manggihan Getasan melalui Penerapan Smart Farming Menggunakan Energi Terbarukan
Authors: Ismail Munaf , Arifin Bustanul , Nugroho Agus Adi , Jati Budi Pramono , Hapsari Jenny Putri
Published: August 2024

Mendasarkan kondisi objektif di daerah dan desa masih menunjukan banyaknya masalah dan tantangan dalam pelaksanaan pembangunan Desa Manggihan. Isue startegis yang harus segera diatasi adalah rendahnya produktivitas pertanian, infrastruktur desa belum memadai salah satunya penerangan listrik jalan umum belum menerangi semua jalan utama. Pendampingan dan penerapan teknologi smart green house perlu di disosialisaikan kepada masyarakat setempat, khususnya kelompok petani diberikan dalam bentuk workshop yang dilakukan bersama dosen dan mahasiswa untuk memberikan penjelasan lebih detil. Pendampingan dan penerapan teknologi  penyiraman otomatis dan sumber tenaga listrik dari energi terbarukan matahari (photovoltaic) akan meningkatkan kemandirian dan kesejahteraan Desa Manggihan masyarakat umum, masyarakat yang bergerak dalam bidang pertanian. Tim pengabdian masyarakat UNISSULA bekerjasama dengan mitra kelompok tani Mulyo Langgeng Desa Manggihan kabupaten Semarang, telah berhasil mengurangi pengeluaran operasional kelompok tani sebesar 50%. Selain itu juga meningkatkan hasil pertanian masyarakat Desa Manggihan dengan penerapan teknologi photovoltaic.Based on objective conditions in the regions and villages, there are still many problems and challenges in implementing the development of Manggihan village. Strategic problems that must be addressed immediately include low agricultural productivity, inadequate village infrastructure, one of which is that electric lighting on public roads does not illuminate all main roads. Assistance and application of smart green-house technology needs to be socialized to the local community, especially farmer groups in the form of workshops conducted with lecturers and students to provide more detailed explanations. Assistance and application of automatic watering technology and electrical power sources from renewable solar energy (photovoltaic) will increase the independence and welfare of the Manggihan village community in general, communities engaged in agriculture. The UNISSULA community service team in collaboration with partner farmer group Mulyo Langgeng, Manggihan village, Semarang district, succeeded in reducing the farmer group's operational costs by 50%. Apart from that, it also increases the agricultural output of the Manggihan village community by implementing photovoltaic technology.
Частотне рознесення сигналів в цифрових тропосферних системах передачі
Authors: Почерняєв В. М. , Сивкова Н. М. , Магомедова М. С.
Published: August 2024

В статті досліджується ущільнення за часом інформаційних сигналів з сигналами зондування, передача службових сигналів сигналами зондування та оцінка впливу зосереджених завад на вибір числа частотних рознесень для цифрових тропосферних систем передачі військової техніки зв’язку. Для створення малогабаритних цифрових тропосферних систем передачі спеціального користування, що мають одну антену для передачі та прийому сигналів, застосовують рознесення сигналу за частотою. Серед методів рознесення сигналів за частотою розрізняють метод передачі з багаточастотними сигналами і метод адаптації за частотою. В роботі зроблено висновок на користь метода адаптації за частотою. На прийомі за зондуючими частотами визначається оптимальна частота, де коефіцієнт передачі тропосферного каналу є максимальним. На вибрану оптимальну частоту переналаштовується передавач, потужність якого використовується для передачі інформації на вибраній частоті до наступного циклу зондування. В статті оцінено ймовірність помилкового прийому залежно від величини часу зондування для двох моделей каналів зв'язку – релеївського та райсівського. В роботі зазначено, що в адаптивній радіолінії службові сигнали передаються тільки на оптимальних частотах так, як і інформаційні сигнали, а при прийомі службових сигналів на оптимальних частотах зворотний канал не використовується. При використанні зондуючих сигналів в якості службових сигналів, що передають спеціальні команди, не потребується додаткових витрат потужності на передачу команд службових сигналів. Зазначено, що для оцінки впливу зосереджених завад на вибір числа частотних рознесень адаптивної системи час існування завади значно більший періоду перемикання системи на оптимальну частоту. Втрати, що виникають внаслідок зосередженої завади, зменшуються, якщо збільшити число гілок частотного рознесення.