bluuebunny/crossref_metadata_2025 huggingface dataset:
ANÁLISE DO COMPORTAMENTO APLICADA AOS CUIDADOS PALIATIVOS EM CARDIOLOGIA
Authors: Santos de Souza Leonardo ,   Universidade do Oeste Paulista-UNOESTE, Gabos Priscila Maria , Cury Ismael Silvia Maria ,   Hcor,   Hcor,   Hcor
Published: August 2024

Pacientes com insuficiência cardíaca (IC) necessitam de cuidados paliativos (CP) proporcionais, mas a abordagem integral ainda é limitada. Neste relato de caso, um paciente admitido por infarto evoluindo para IC, ao receber CP, teve uma resposta positiva à terapêutica curativa. O acompanhamento psicológico analítico-comportamental desempenhou um possível papel mediador nesse desfecho. O paciente, um homem de 66 anos, casado, apresentava repertório comportamental rígido, múltiplos fatores de risco cardiovascular e de saúde mental. As intervenções psicológicas concentraram-se na validação precoce da necessidade de CP, na cooperação entre equipes e no fortalecimento do paciente para (re)existir diante de sua nova condição de vida
Características identificadas por los docentes de educación básica en el departamento de Caldas (Colombia) en estudiantes con talentos y/o capacidades excepcionales
Authors: Erazo Burbano Diego  Alejandro , Delgado Reyes Andrés Camilo , Aguirre Aldana Lorena
Published: August 2024

Exceptional talents and/or abilities are recognized in children or adolescents who demonstrate a greater general learning capacity or in a specific area of knowledge, placing themselves above their reference group. Although in the Colombian context the presence of this population in classrooms is a reality, there are still no clear routes for the recognition of their individual differences. The objective of this study is to identify the characteristics that primary education teachers in Caldas (Colombia) recognize in students with exceptional talents and/or abilities. This is a quantitative, cross-sectional, descriptive and correlational study. The sample was selected intentionally and by convenience, and consisted of a total of 125 participants. The results showed that the predominant indicators are creativity, autonomy and the ability to apply knowledge to solve problems. In addition, it was observed that a higher level of academic training does not necessarily guarantee access, knowledge or mastery of specific topics in the management of students with high intellectual abilities. To change stereotypes, teachers must understand the nature of giftedness and talents and reflect on their beliefs to become aware of their own stereotypes and their potential effects on their classroom behavior and student development.
Psycholinguistic Analysis of Inversion as a Rhetorical Figure in Fiction
Authors: Tolochko Orest , Zhylin Mykhailo , Medynska Nataliia , Grytsenko Svitlana , Ivasyshyna Tetyana
Published: August 2024

The research deals with identifying the cognitive mechanisms used in cases of applying inversion and revealing its interaction with cognitive structures. The research employed methods of comparative, stylistic, and psycholinguistic analysis. The instruments were tested for reliability and validity using Cronbach’s alpha. Standard methods of mathematical statistics were also used. Inversion is a powerful rhetorical tool that can be used to create a variety of stylistic effects. In his novel entitled 1984, George Orwell used inversion to create the effect of expression and emphasize the contradictions of the totalitarian system. Jane Austen used inversion in her novel Pride and Prejudice to create the effect of expression and emphasize the characters’ personality and their internal conflicts. The use of inversion has the potential to add expressiveness and emotion to a phrase, evoking certain feelings or emotional responses in the reader. The academic novelty is an in-depth analysis aimed at identifying the interaction between the author’s individual creative process and the mental structures that determine the use of inversion. The practical value of the research is the possibility of applying the obtained results in education and literary creativity. Further research may focus on establishing the effects of inversion on text comprehension, reader’s emotional responses, and other important aspects.
Contribution to artisanal gold ore processing methods in Africa and their impact on the environment
Authors: AHMED SEKOU DIALLO  , AHMED AMARA KONATE  , KANDAS KEITA
Published: August 2024

The current practice of artisanal gold ore processing in Africa has a significant impact on the region's biophysical and socio-economic environment. Crushing, grinding, gravity separation and amalgamation are the traditional methods of processing gold ore. These activities can lead to the release of toxic elements such as mercury and cyanide into the environment, which can have harmful effects on local ecosystems and human health. The aim of this work is to monitor the impact of artisanal gold ore processing methods on the physical environment. In the course of this study, we assessed the impacts of these different treatment methods on the biophysical and socio-economic environment, as well as their interactions with other components of the environment. Artisanal processing of gold ore can be an important source of income for local communities in socio-economic terms, but it is often associated with unsafe working conditions and unsustainable practices. In addition, competition for access to mineral resources can lead to social and political conflict in the region.
Potential of synbiotic bio-yoghurt with inoculation of probiotic Lactobacillus acidophilus and prebiotic inulin from dahlia tuber (Dahlia pinnata) encapsulated with chitosan nanoparticles as diabetes management: A literature review
Authors: M. Hawaril Mughni  , Ilham Rahmanto  , Najmi Rahmalyab Ardy  , I Putu Alit Pawana
Published: August 2024

Type 2 diabetes mellitus (T2DM) is a chronic metabolic disease characterized by elevated blood glucose levels that can lead to various complications. Lifestyle approaches by consuming healthy foods or beverages are gaining more interest as T2DM management in Indonesia. Synbiotic bio-yogurt with probiotic Lactobacillus acidophilus inoculation and prebiotic inulin from dahlia tuber (Dahlia pinnata) encapsulated in chitosan nanoparticles, is a potential health drink that can be a management of T2DM. This literature review aims to explore the potential of L. acidophilus probiotics, inulin prebiotics, and chitosan nanoparticles as a new approach to T2DM management. The literature search was conducted using scientific databases such as PubMed, Google Scholar, and ScienceDirect with specific keywords related to the research topic. The results of this literature are expected to provide a recommendation in the management of T2DM through synbiotic-based health drink products.
Epistemology unveiled: Exploring the foundations of knowledge in philosophy
Authors: Pamba Shatson Fasco  , Specioza Asiimwe  , Judith Tushabe  , Godfrey Ssekabira
Published: August 2024

The goal of this study is to launch an investigation into the complex nature of knowledge, incorporating both historical and contemporary viewpoints. The core of epistemological research is summarized in this abstract, which highlights the changing conception of belief, justification, and knowledge by referencing contemporary academic research. In addition to addressing contemporary advancements like naturalized, feminist, and social epistemology as well as the impact of cognitive sciences on epistemological thought, the research captures classic epistemological questions, the role of skepticism, and the importance of the a priori. Analysis of Al-Ghazali's synthesis of procedures and knowledge sources within Islamic epistemology reveals contradictions and intriguing facts that point to a historical continuity with current attempts to bring disparate epistemic areas into harmony. Furthermore, the study tackles the problem of philosophical skepticism by examining how feminist contextualist epistemology provides fresh answers to conventional skepticisms regarding the possibility of knowing. The complete survey of epistemological discourse provided by "Epistemology Unveiled" emphasizes the dynamic interaction between historical insights and contemporary theoretical breakthroughs. It emphasizes the value of multidisciplinary approaches in current epistemological studies as well as the necessity of understanding epistemic and social power dynamics in the search of knowledge. This article advocates for a sophisticated and integrated approach to comprehending epistemic ideas and their practical implications, adding to the continuing discussion regarding the foundations of knowledge.
Evaluasi Kinerja Operasional Bus Trans Jatim Rute Bunder - Porong
Authors: Juliati Kristin , Ayunaning Kholidia
Published: August 2024

Kabupaten Gresik adalah wilayah pengembangan yang tidak terlepas dari kegiatan subwilayah pengembangan Gerbang Kertosusilo (Gresik, Bangkalan, Mojokerto, Surabaya, Sidoarjo, Lamongan). Seiring dengan meningkatnya jumlah kegiatan yang memerlukan jasa transportasi, pergerakan lalu lintas antar kota dan antar negara (AKAP) pun meningkat. Transportasi massal di Kabupaten Gresik yaitu Bus Trans Jatim. Trans Jatim merupakan suatu sistem transportasi bus cepat, murah, dan ber-AC yang beroperasi di seputar Kota Gresik-Surabaya-Sidoarjo. Trans Jatim ialah salah satu dari program bus rapid transit (BRT) di Indonesia dengan skema pembelian layanan (Buy The Service). Dalam pelaksanaannya mungkin saja terjadi berbagai kendala dan permasalahan. Sehingga dibutuhkan evaluasi kinerja operasional Bus Trans Jatim.
Penelitian diawali dengan melakukan survei dan pengumpulan data lapangan seperti waktu tempuh, waktu antara, kecepatan perjalanan, dan waktu tunggu. Data yang terkumpul akan dianalisis yaitu analisis faktor muat, waktu tempuh, analisis waktu antara, kecepatan, waktu tunggu, frekuensi kendaraan. Hasil penelitian tersebut kemudian dianalisis berdasarkan SK Direktorat Jenderal Perhubungan No. 687/AJ.206/DRJD/2002 mengenai Pedoman Teknis Penyelenggaraan Angkutan Umum Di Wilayah Perkotaan Dalam Trayek Tetap dan Teratur.
Hasil dari penelitian ini menunjukkan bahwa kinerja Bus Trans Jatim yang sudah memenuhi syarat yaitu, kecepatan perjalanan bus sebesar 28,02 km/jam, waktu tunggu sebesar 14,3 menit, dan frekuensi sebesar 4 kendaraan/jam. Yang belum memenuhi syarat yaitu faktor muat sebesar 34%, waktu tempuh 128 menit, waktu antara (headway) sebesar 15 menit.
Analisa Biaya Dan Waktu Menggunakan Metode Earned Value Pada Proyek SMAK Untung Suropati Sidoarjo
Authors: Adriansyah Bagus Prisma , Prafitasiwi Avisha Gita
Published: August 2024

Meningkatnya pertumbuhan ekonomi di bidang pendidikan, membuat lembaga pendidikan baik negeri maupun swasta melakukan pembangunan proyek konstruksi guna memenuhi kebutuhan ruang maupun berbagai fasilitas dengan mengikuti perkembangan di era sekarang. Pembangunan proyek konstruksi perlu dilakukan pengelolaan yang baik untuk mendapatkan hasil yang maksimal.  Pengelolaan proyek konstruksi dapat dilakukan dengan baik dan mudah menggunakan metode analisa nilai hasil (Earned Value Analysis). Analisa nilai hasil digunakan bertujuan untuk memperkirakan sejauh mana pelaksanakan proyek yang sesuai dengan rencana kerja. Hasil penelitian menggunakan metode Analisa Nilai Hasil (Earned Value Analysis) pada waktu pelaporan terakhir minggu ke-35 didapatkan nilai CV sebesar Rp. 431.108.703,44 menunjukan lebih hemat daripada biaya rencana dan nilai SV didapatkan sebesar - Rp 1.348.694.431,77 menunjukan mengalami keterlambatan terhadap waktu rencana. Sedangkan nilai CPI sebesar 1,044 menunjukan lebih hemat daripada biaya rencana dan nilai SPI sebesar 0,883 menunjukan mengalami keterlambatan terhadap waktu rencana. Hasil analisa prakiraan biaya pada akhir proyek didapatkan nilai sebesar Rp. 11.919.732.905,76 lebih kecil daripada anggaran rencana dan prakiraan waktu pada akhir proyek didapatkan nilai sebesar 298 hari sehingga mengalami keterlambatan selama 13 hari terhadap rencana.
Synthesis Of Derivate Acetophenone From Fenol And Eugenol
Authors: Kapelle Imanuel B. D. , Matsjeh Sabirin
Published: August 2024

The synthesis derivate acetophenone from fenol and eugenol had been carried out.  The acylation of fenol was performed by anhydride acetate and the fries rearrangement reaction was carried out using AlCl3 catalyst at temperature of 50oC produce ortho-hydroxyacetophenone (35,29 %), purity was tested by GC, structure elucidation of these product ware analized by FTIR and 1H-NMR. Acylation reaction of eugenol was performed by anhydride acetate in base condition at temperature of 120oC for 3 h produce 5-allyl-2-hydroxy-3-metoksi acetophenone (21,42%), purity was tested by GC, structure elucidation of these product ware analized by FTIR, 1H-NMR and MS.
Analyzed The Resistant Starch Content of Some Types of Sago Starch In Embarrassment with Heating Temperature Variations
Authors: Lapu Petrus , Telussa Ivonne
Published: August 2024

Analyzed the resistant starch content of some types of sago starch in embarrassment with heating temperature variations have been conducted. In this analysis was done processing sago starch suspension, determination of the fat content of flour, qualitative test and analysis of starch digestibility and resistant starch manufacture of some types of sago starch in Maluku (sago ihur, sashes, molat) by varying the temperature of the heating method. The results were obtained moisture content of the sample base for this type of sago ihur 49.61%, 45.85% and sashes molat 47.77% while for the corn starch to the type ihur 9.329%, 6,245% and Molat sashes 5,793% while the tannin-free corn starch to type ihur 5.362%, 5,407% and molat sashes 4,719% and ash content of corn starch to the type ihur 0.09656%, 0.0761% and molat sashes 0.07146%.  Glucose levels in samples of corn starch (type ihur, sashes and Molat) is hydrolyzed by the enzyme pancreatin is greater than the resistant starch glucose levels ranged from 1-1.4 mg / mL whereas for resistant starch samples with smaller temperature variation which is equal to 0.6-1.0 mg / mL.
Kinetic Study And Isoterm Adsorption Of Pb Metal In Ouw Village Clay Activated Ammonium Nitrate Salt
Authors: Sekewael Serly J. , Tehubijuluw Hellna , Reawaruw Delvika R.
Published: August 2024

Kinetics studies and adsorption isotherms of  Pb metal have been conducted on activated clay salts of ammonium nitrate (NH4NO3). Clays used are taken from Ouw village, Central Maluku. Clay activated by soaking in a solution of NH4NO3 700 ppm for 5 hours, then filtering and heating in a furnace at 550 oC for 4 hours. The optimum adsorption of metal ions Pb (II) by activated clay ammonium nitrate occurs at pH 4 with a contact time of 4 hours and followed the Freundlich adsorption isotherm pattern with a Kf value of 1.6193 x 10-8 mg/g and n value of  0.2059. Pb adsorption kinetics followed the pseudo-second-order Lagergren equation with the value of the adsorption rate constant (k2, ads)  of 0.1248 g mg-1 min-1 and Xe value of 4.4783 mg/g.
Effects of Contamination Detergent (Las) On The Expression Of iNOS In Kidney Common Carp (Cyprinus carpio L.)
Authors: Borut Ruku R.
Published: August 2024

This research aims to know the expression of iNOS in the kidney of fish contamination of LAS (linear alkylbenzene sulfonat). Expression of iNOS observations of renal cells cranial common carp by using immunohistochemical methods show that distribution in the cytoplasma and iNOS cell nucleus. Expression of iNOS in the head kidney tissue distribution carp tubules and other networks is uneven. Expression of iNOS on a network of tubules occurs in cells on the outside. On other network distribution unevenly iNOS expression.
Expression of iNOS in the head kidney tissues of common carp found in the control group and treatment group LAS contamination during 48 hours of observation. Expression of iNOS in the control group or normal ranges from 4.25-5.5 % of cells, treatment A (0,01 mg/L LAS) 10.5-15.75 % cell, treatment B (0,02 mg/L LAS) 9.75-22.25  % cell, treatment C (0,03 mg/L LAS) 10.75-21.00 %, treatment D (0,04 mg/L LAS) 14.5-18.00 % cell and treatment E (0,05 mg/L LAS) 13.00-18.00 % cell. Standard deviation on the control ranges from 2,08 up 3.4 while in group treatment ranged  1 to 1.25
Effect Of Soft Drink To Demineralization On The Tooth Enamel By Addition Of Sodium Fluoride
Authors: Ruslan Ruslan
Published: August 2024

This research was carried to determine the influence of soft drink with tooth, determine power to retard of NaF at the demineralization of tooth enamel and to determine of Calcium and Phosphate total which dissolve. The research was carried out with to flood the tooth in soft drink without to add a soft drink and with to add a soft drink at the certain time variation. The demineralization of tooth enamel to see at the decrease of tooth weight before and after flooded. The degree of Calcium in soft drink to measure  with Atomic Absorption Spectrophotometry (AAS) and the degree of Phosphate in soft drink to measure with Ultra Violet-Visible Spectrophotometry. The result of research shows that the more long time tooth contacts with soft drink, the more much Calcium and Phosphate which dissolve. And with to add the Fluor with concentration 1 ppm can to harm demineralization of tooth enamel.
Bioethanol Production From Waste Coconut Water Through Fermentation Process
Authors: Malle Dominggus , Kapelle Imanuel B. D. , Lopulalan Flourence
Published: August 2024

Bioethanol can be produced through glucose fermentation using saccharomyces cerevisiae. Was done to make coconut water contains a small amount of carbohydrate. A researcher had taken research was done to make bioethanol from coconut water waste. The result of the research shows that coconut water fermentation with yeast has maximum speed after 70 minutes of incubation. The fermentation solution was then distilled. Bioethanol purity was about 76-80% after HPLC analysis.
Trimyristin Isolation From Nutmeg And Synthesis Of Methylester Using Heterogen Catalyst
Authors: Kapelle Imanuel B. D. , Laratmase Marsela S.
Published: August 2024

Trimyristin isolation from the nutmeg and synthesis of methylester using heterogen catalyst has been carried out
in several stages, included isolation of nutmeg oil, trimyristin isolation and synthesis of methylester. The
synthesis was started by isolation of nutmeg oil with steam distillation for 8 hours. It yields was 308 mL of
nutmeg oil. The isolation trimyristin from nutmeg with maseration using chloroform yields trimirystin 17 g
(11%), structure elusidation of these products was analized by FTIR and 1H-NMR. The synthesis methylester
using CaO catalyst and methanol yields 1,78 g (89,02%) of methyl myristate. Product purity was tested by GC
and structure elusidation was analized by FTIR and MS.
Bioactivity assay of compound (hexa-tetra contane) From Callyspongia pseudoreticulata As Antibacterial Agent Of â€œPenyakit Layuâ€ (Ralstonia solanacearum) In Potato Plant
Authors: Nurdin M.
Published: August 2024

Sponge is one of the marine biota that known have a high bioactivity potential and contain secondarymetabolites that can be used as antibiotic and medicinal materials. The aim of this research was tobioactivity assay of hexa-tetra contane compound contained in Callyspongia pseudoreticulata.Antibacterial tested has been carried out for Ralstonia solanacearum in potato plant. The resultsshowed that 400 mg/ml of compound has the best inhibitory diameter of â€œPenyakit Layuâ€ bacterial(Ralstonia solanacearum) was 21.33 mm and significantly different to other concentration.
Oleanan Derivate Compounds From Melochia umbellata (Houtt) Stapf var. Degrabrata K Bark And Their Bioactivity
Authors: Usman Usman , Soekamto Nunuk H. , Usman Hanapi , Ahmad Ahyar
Published: August 2024

Oleanan derivated 3-acetyl-12-oleanen-28-oat has been isolated from the n-hexane fraction of M. umbellata(Houtt) Stapf var. degrabrata K. bark. The molecular structure were determined by IR spectroscopy, 1D and 2DNMR (1H, 13C, DEPT, COSY, HMQC and HMBC) data analysis. Bioactivity tested results indicated that thecompound was toxic to A. salina with LC50 value was 361.93 mg/mL. At the concentration of 1000 mg/mL 3acetyl-12-oleanen-28-oat gave the highest inhibition to bacteria B. subtilis and the fungus C. albicans with the inhibited zone diameter was 15.8 mm and 15.2 mm, res.
Computational Study Natural Color Essence (Dyes) As Active Material On Organic Solar Cell With Density Functional Theory (DFT)
Authors: Male Yusthinus T , Sutapa I Wayan , Ranglalin Olivia M.
Published: August 2024

Computational calculation has been done for anthocyanin, tocoferol and they derivatives. The computational calculation was conduct to know the compound potential of anthocyanin, tocoferol and they derivatives as active material on organic solar cell. Computational calculation was done by used Gaussian 03 for windows with ab inito alternative electron structure theory namely Density Functional Theory (DFT) with B3LYP method at basis set 6-31G (d). Computational calculation obtains that the structure of anthocyanin, tocoferol and they derivatives were symmetrical. There were two compounds of anthocyanin (A1 and A5) and two compounds of tocoferol (T3 and T4) which more stable than the others compounds.  The compounds had lowest energy gap were consist of A1= 0.12629 eV, A5= 0.12570 eV, T3= 0.19334 eV and T4= 0.19231 eV. The moment dipole from compound of anthocyanin, tocoferol and they derivatives had highest value, they were A1 and T1 while the total energy had lowest value they A2 and T1. The Substituent methoxy and hydroxy were added the density load of C atom was substituted so it would increase the activity of the phenyl ring on anthocyanin and they derivatives, while substituent methyl and hydroxy were added the density load of C atom was substituted so it was increase the activity of the phenyl ring on tocoferol and they derivatives. For compounds of anthocyanin main orbital populations showed that there were load transfer only from middle chain (ether) and compounds of tocoferol main orbital populations showed that there was load transfer only from phenyl ring. The method of density functional B3LYP/6-31G(d) would be applied to structure prediction and electronic characteristic of anthocyanin, tocoferol compounds and they derivatives before synthetic.
Photodegradation of Remazol Yellow Using A-Type Zeolite/TiO2
Authors: Tumbel Elsa D. , Wuntu Audy D. , Abidjulu Jemmy
Published: August 2024

The research aimed to study photodegradation of remazol yellow (RY) using TiO2-impregnated A-type zeolite (zeolite-A/TiO2) has been conducted. The materials having zeolite/TiO2 ratio of 1:0.2, 1:0.4, 1:0.6, 1:0.8, 1:1.0, 1:1.2, dan 1:1.4 g/g were used to degrade remazol yellow (RY) under ultraviolet irradiation for 3 hours and percentages of RY degraded were determined using spectrophotometer at 414 nm. Those with zeolite/TiO2 ratio of 1:0.2, 1:0.8, and 1:1.2 were used to study photodegradation kinetics at time range up to 3 hours. The results showed that the highest amount of RY degraded (82.17%) was attained   by the use of material with zeolite/TiO2 ratio of 1:0.2. This material generated the highest value of rate constant (k=0.074 min-1), followed by those of 1:1.2 (0.045 min-1) and 1:0.8 (0.025 min-1).
Application of TiO2 Nanotube As Photoelectrode For Corrosion Prevention Of Stainless Steel In pH Variation of NaCl
Authors: Misriyani Misriyani , Wahab Abdul Wahid , Taba Paulina , Gunlazuardi Jarnuzi
Published: August 2024

The research amis to synthesize TiO2 nanotube photoelectrode (TiO2-NT) by anodizing method. The photoelectrodes applied in photoelectrochemical system to prevent the corrosion of steel. Anodizing method carried out by preparing an electrochemical system consisting of a titanium plate as anode and Pt wire as cathode in electrolyte containing glycerol, ammonium fluoride and water. Voltage applied from the DC current source and followed by thermal treatment at a temperature of 500oC. The photoelectrode further characterized by using X-Ray Diffraction and Surface Area Analyzer. The result of anti-corrosion test of stainless steel 304 by TiO2-NT showed that photopotential value of steel shifted to the more negative value in UV light. The significant potential shift occurs at pH 8 and the corrosion rate of stainless steel 304 couple with TiO2-NT decrease reaches 1.7 times. It concluded that the photoelectrodes can be used to reduce the corrosion rate of stainless steel 304 by utilizing sollar energy as a source of UV light.
Validasi Metode X-Ray Fluorescence untuk Analisis Ion Fe dalam activated Methyl Diethanol Amine (aMDEA)
Authors: Panggabean Aman S. , Rachman Arief
Published: August 2024

A research about validation method of Fe analysis in activated Methyl Diethanol Amine (aMDEA) using X-Ray Fluurescence (XRF) has been done. Analysis of Fe ion in aMDEA was performed to find out the rising of Fe in aMDEA that will show corrosion or metal erosion is caused by aMDEA degradation and contamination or accumulation from heat stable salt that can dissolve or scrape the film coat in carbon steel. Validation is done consist of linearity, accuracy, precision, limit of detection, and limit of quantitation. The analytical performance of the XRF for determination of Fe ions is good, shown as coefficient of correlation are 0.9997, repeatability as % RSD value are 1,93 % less than 2/3 CV Horwitz 6.24 %, percentage of recovery  are 103.35 % . The LOD and LOQ are 0.351 and 2.975 ppm respectively, and Fe selectivity in aMDEA at 6.4 keV. The results obtained showed the XRF can be used for the routine analysis in the determination of Fe ions aMDEA samples.
Potensi Ekstrak Metanol Kulit Batang Lannea coromandelica (Houtt.) Merr. Terhadap Staphylococcus aureus Dan Analisis Metabolit Sekunder Utamanyanya
Authors: Syamsurya Syamsurya , Ahmad Ahyar , Firdaus Firdaus
Published: August 2024

This study aims to determine the potential of the methanol extract of the stem bark Lannea coromandelica (Houtt.) Merr. against Staphylococcus aureus and to analyze the main secondary metabolites. Staphylococcus aureus antibacterial activity test was performed by Mueller-Hinton agar medium whereas the secondary metabolite analysis of the methanol extract of the stem bark is conducted by GC-MS instrument. Results of research the methanol extract of bark Lannea coromandelica (Houtt.) Merr showed antibacterial activity against Staphylococcus aureus with inhibition zone diameter each at a concentration of 2.5% by 7.3 mm by 8.6 mm 5% and 10% of 10.4 mm. Selanjunya result of analysis by using GC-MS showed the presence of compounds 5-hidroksimetilfurfural and compounds 1, 2, 3-benzenetriol potential as an antibacterial Staphylococcus aureus. Furthermore, the results of analysis by GC-MS instrumeny showed the presence of compounds 5-hidroksimetilfurfural and compounds 1, 2, 3-benzenetriol potential as an antibacterial Staphylococcus aureus.
Pengaruh Variasi Garam Ammonium Terhadap Keasaman Zeolit Alam Pada Reaksi Perengkahan Minyak Jelantah
Authors: Fabiani Verry A. , Silalahi Imelda H. , Sayekti Endah
Published: August 2024

Natural zeolite modification with the addition of ammonium salt variations was conducted. The modification was conducted by demineralization method, dealumination and followed by activation of ammonium salt. The types of activators were ammonium chloride, ammonium nitrate and ammonium fluoride. The effect of ammonium salt was assessed through acidity parameter with Si/Al ratio variable and applied catalyst for catalytic cracking of waste cooking oil. The results showed that the activation of natural zeolite by using ammonium chloride salt could increase the acidity of natural zeolite with the highest Si/Al ratio about 15.56. Based on the XRF analysis showed that the reduced amount of Na metal in zeolite about 92.8%. The effect of ammonium salt variation on the acidity of natural zeolites was observed by applying a catalyst in the catalytic cracking of waste cooking oil. Physical characteristic of catalytic cracking products from waste cooking oil indicated all products fulfill the solar standards requirement. The results concluded that ammonium chloride salt was the best activator in natural zeolite modification and generally all ammonium salts gave high acidity effect to natural zeolite in catalytic cracking of waste cooking oil.
Biosorpsi Ion Logam Tembaga (Cu2+) Pada Biosorben Rumput Laut Coklat (Padina australis)
Authors: Bijang Catherina M. , Latupeirissa Jolantje , Ratuhanrasa Marike
Published: August 2024

The research on the biosorption of Cu2+ metal ions in brown seaweed biosorbent (Padina australis) has been done. This study aims to determine moisture content, ash content, biomass content, pH and optimum contact time of Cu2+  metal ions absorption pH and optimum contact time of Cu2+  metal ions absorption. The method used is batch method. The adsorption result of Cu2+ metal ions was analyzed  by  using  atomic  absorption  spectrophotometer  (AAS).  The  results showed that the optimum pH was 7 with 99.8308 % absorption ability of biosorbent and the optimum contact time was 5 hours with 99.5570 % biosorbent absorbency.
Biosorpsi Ion Logam Kadmium (Cd2+) Pada Biosorben Rumput Laut Coklat (Padina australis) Asal Pantai Liti Pulau Kisar
Authors: Bijang Catherina M. , Tehubijuluw Helna , Kaihatu Terence Ghereds
Published: August 2024

The research about biosorption of Cadmium (Cd2+) metal ion in brown seaweed biosorben (Paladina australis) from Liti beach, Kisar island has been done. Analysis of decreasing Cd2+ content using Atomic Absorption Spectrophotometer (SSA) and also use FTIR to know functional groups contained in alginate compounds. A total of 0.5 g of brown seaweed powder was introduced into 25 mL of Cd2+ 50 ppm solution with variations of pH 1-7 and shaker for five hours. After the  optimum  pH  was  obtained,  the  adsorption  process  was  applied  on  pH  5 solution with variation of contact time 1, 3, and 5 hours, after which it was filtered. The result of analysis and calculation showed that Cd2+ ion was optimum at pH 5 of 99.64% and 3 hours contact time was 74.54%.
Isolasi Mikroba Dari Air Asam Tambang Pada Area Pertambangan Tembaga Di Pulau Wetar, Provinsi Maluku
Authors: Male Yusthinus T. , Modok Deddy W.S. , Seumahu Cecilia A. , Malle Dominggus
Published: August 2024

This research was conducted to find bacteria from the genus Acidithiobacillus ferrooxidans which isolated from mine acid water in the copper mining area on Wetar Island, Maluku Province. This bacterium will be utilized in the biohidrometallurgical process (bioleaching) for copper extraction in mining area. The results of this study indicate that bacteria can be isolated from mine acid water samples by enrichment method that was use liquid media from Leathen which is optimized using Trypton Soya Broth (TSB) and bacterial growth on solid media. The presence of Thiobacillussp bacteria was confirmed by the results of gene analysis using a 16S rRNA sequence showing the presence of mixed bacterial colonies but not a single colony.
Kapasitas Antioksidan Ekstrak Buah Rukam (Flacourtia rukam) Menggunakan Metode Microwave Assisted Extraction (MAE)
Authors: Fadiyah Inas , Lestari Iin , Mahardika Robby Gus
Published: August 2024

Rukam fruit (Flacourtia rukam) is one of the species spread in Indonesia, specifically Bangka Island. Rukam has a higher phenolic ratio than guava (Psidium guajava). Phenolic compounds have a major role as antioxidants, while antioxidants have the ability to fight free radicals. Therefore a study was conducted to examine the application of secondary metabolites and antioxidant bioactivity of the Flacourtia rukam species using the Microwave Assisted Extraction method. Rukam fruit extract is obtained by using the Microwave Assisted Extraction (MAE) method. While for the antioxidant test using the DPPH method. The test results of antioxidant activity of rukam fruit extract with ethanol solvent were obtained with IC50 value 47.7022 ppm and in rukam fruit extract with acetone solvent IC50 33.1702 ppm obtained using this antioxidant antioxidant powder was very strong.
Profile Analysis of Fatty Acids of Tengkawang (Shorea Sumatrana) Oil Using GC-MS and Antibacterial Activity
Authors: Riski Diah Gusti , Maulana Rico Gewana Resdy , Permana Edwin , Lestari Intan , Tarigan Indra Lasmana
Published: August 2024

The Shorea sumatrana (tengkawang) plant is endemic to Indonesia, especially in Kalimantan and Sumatera regions, which produces chemical diversity especially as a natural drugs. Specific aims to investigate both the profile analysis of fatty acid and antibacterial potential of tengkawang oil. The extract of tengkawang oil was carried out using the soxhlet extraction method. The profile analysis of fatty acid was verified by GC-MS and the antibacterial activity was evaluated using disc-diffusion method. The profile analysis of fatty acid of tengkawang oil indicated the presence of palmitic acid (17.26%), stearic acid (60.68%), oleic acid (11.98%), oleic acid chloride (1.80%), stearic acid chloride (1.86%), glycidyl stearate (1.92%), diethyl phthalate (4%), and 2-monopalmitin (0.5%). We determined the antibacterial activity by the diameter of inhibition of growth zone against Salmonella enteritidis, Escherichia coli, Staphylococcus aureus, and Bacillus cereus at a concentration of 12.5%, 25%, 50%. These were compared with standard tetracycline as positive control and DMSO was assigned negative control. It was found that the highest percentage of fatty acid in tengkawang oil is stearic acid, at 60.68%, and that tengkawang oil is an antibacterial agent with a concentration optimum at 25% with more susceptibility to Gram-positive than Gram-negative bacteria.
Pengaruh Waktu Reaksi Terhadap Viskositas Dan Densitas Tetraetil Ortosilikat Dari Silika Abu Sekam Padi
Authors: Mujiyanti Dwi Rasy , Nisa Hayatun , Rosyidah Kholifatu , Ariyani Dahlena , Abdullah Abdullah
Published: August 2024

Tetraethyl Ortosylicate (TEOS) is a material is widely used in industrial fields. One source of silica (SiO2) is rice husk ash. In this study was determined the effect of reaction time on viscosity and density in making TEOS from silica rice husk. Silica resulting from the purification of rice husk ash is used in the TEOS manufacturing process by examining the variation of reaction time. One mole of ethanol and 0.25 mole of silica powder were added into 250 ml of round bottom flask followed by the addition of 1 gram of CuO/Al2O3 catalyst then the mixture was refluxed for 30, 35, 40, 45 and 50 hours with sufficient stirring and a temperature of 90 Â°C. The FTIR characterization results show that there are three main functional groups, namely the -OH, Si-O and C-O groups in the five TEOS synthesis results. Wavenumbers of the â€“OH functional groups obtained ranged from 3349 cm-1 - 3315 cm-1; Si-O functional groups range from 813 cm-1 - 606 cm-1 and C-O functional groups range from 1105 cm-1 - 1040 cm-1. Reaction time has no significant effect on viscosity. Reaction time has no significant effect on the density and density of the resulting TEOS.
Patchouli Oil Isolation and Identification of Chemical Components Using GC-MS
Authors: Souhoka Fensia Analda , Al Aziz Andi Zulkifli , Nazudin Nazudin
Published: August 2024

This research aims to isolate oil from patchouli (Pogostemon cablin Benth) and identify the chemical components of patchouli oil using Gas Chromatography-Mass Spectrometry (GC-MS). Patchouli plant samples were obtained from Welulu Village, Kolaka Regency, Southeast Sulawesi Province. Fresh patchouli leaves are dried in the sun for four days to a constant weight. Patchouli leaves water content is 77.41% (w/w). Dry patchouli leaves are distilled using the water and steam method for two hours. Water and oil distillates are separated using a separating funnel. Patchouli oil obtained was dried using Na2SO4 anhydrous and yield 0.73% (w/w). The results of GC-MS analysis showed that patchouli oil contained 13 chemical components compounds, namely Î²-patchoulene (4.56%), cedr-8-ene (1.24%), trans-caryophyllene (7.96%), Î±-guaiene (18.61%), seychellene (5.70%), patchoulene (2.88%), eremophilene (1.33%), azulene (8.74%), delta-guaiene (18.90%), cyclohexanone (1.10%), globulol (1.88%), veridiflorol (4.39%), and alcohol patchouli (22.7%).
Synthesis of Pentapeptide FWKVV (Phe-Trp-Lys-Val-Val) and Its Activity as Antioxidants
Authors: Yanti Eka Fitri , Nazareth Eviyanti , Agustin Yuana Dwi , Usman Mohammad Rofik
Published: August 2024

Antioxidant pentapeptides are pentapeptide compounds that have antioxidant activity. One of the pentapeptide compounds that have antioxidant activity is FWKVV. FWKVV is a linear pentapeptide with the amino acid sequence phenylalanine-tryptophan-lysine-valine-valine, which was first isolated to hydrolyzate the muscle protein of Miiuy croaker (Miichthysmiiuy). In addition to isolation, FWKVV compounds can be produced by the peptide synthesis method because this method requires a shorter time than the isolation method from natural materials. Synthesis methods commonly used are solution-phase peptide synthesis and solid-phase peptide synthesis (SPPS). However, the SPSS method is more efficient because it does not require purification in every process. The purpose of this study was to synthesize FWKVV compounds using the SPPS method and test their antioxidant activity. FWKVV has been synthesized using the SPPS method with HBTU/HOBt coupling reagent and Fmoc protective group. The FWKVV crud produced was 148.8 mg and had antioxidant activity against DPPH radicals with an IC50 value of 4.2 mg/mL.
Magnetite-Activated Carbon Composite to Reduce Pollutant: Review
Authors: Rafli Muhammad , Wahyuni Reza Mega , Zahiro Nilna Muna , Dasna I Wayan
Published: August 2024

Pollution is a serious environmental problem. One of the causes of pollution is the presence of heavy metals. Besides heavy metals, there are plastics that cause serious problems in the environment because they are difficult to decompose. These two problems appear an idea about synthesizing activated carbon-magnetite (Fe3O4) composite based on polyethylene that can absorb heavy metals. The method used literature review of relevant articles. This study examines the properties of magnetite both physical and chemical along with the applications and benefits of magnetite in daily life. This study can become a new perspective effort to reduce heavy metals pollution using plastic waste as a composite with Fe3O4
Synthesis of Methyl Ester Nitrate from Mahogany Seed Oil (Swietenia mahagoni Linn)
Authors: Musta Rustam , Nurliana Laily , Halulanga Muh. Mahatir
Published: August 2024

Nitration of methyl ester from mahogany oil (Swietenia mahagoniLinn) can be produced by Methyl Ester Nitrate (MEN), an additive that is useful for increasing Cetane Numbers in diesel fuel. This study aims to determine the yield of MEN that can be produced from mahogany seed oil after esterification, trans-esterification, and nitration and to identify the MEN compounds produced. Mahogany oil is obtained by pressing mahogany seeds and then degumming to remove the gum. Mahogany oil-free gum is esterified using methanol with the mole ratio of oil: methanol (1: 6), then trans-esterified, also using methanol with mole ratio (1:15) and a methyl ester is obtained. Then the methyl ester was nitrated with HNO3, sulfuric acid, and acetic anhydride to obtain a translucent reddish colored MEN product with a yield of 24.99%. The success of the synthesis was shown by the FTIR spectrophotometer in the presence of absorption at 1550 cm-1 which indicated the presence of the C-ONO2 group, the absorption at 1365 cm-1 indicated the presence of the NO2 group, and at 1118 cm-1 indicated the presence of the C-N group. The reaction mechanism that occurs during the predicted nitration reaction is an electrophilic substitution reaction and nucleophilic addition.
PENGARUH ISLAMIC CORPORATE GOVERNANCE DAN SYARIAH COMPLIANCE RESPONSIBILITY TERHADAP KINERJA KEUANGAN
Authors: Farichah Ani , Adiwijaya Zainal Alim
Published: August 2024

Setiap bank syariah senantiasa akan mengoptimalkan kinerja keuangannya, sebab pengukuran kinerja keuangan ini menjadi hal yang sangat penting untuk merencanakan strategi, mengambil keputusan dan menentukan kebijakan manajemen yang tepat bagi keberlanjutan perusahaan di masa yang akan datang.. Govenance (ICG), Islamic Social Reporting (ISR), dan pengelolaan zakat sebagai variabel independen terhadap kinerja keuangan sebagai variabel dependen. Variabel ICG diukur dengan 47 indikator sesuai dengan pedoman umum good governance yang diterbitkan oleh Komite Nasional Kebijakan Governance. �Variabel ISR diukur dengan 48 indikator sesuai dengan pedoman peungkapan ISR dalam jurnal yang diterbitkan Haniffa (2002) dan Merina and Verawaty (2016). �Variabel zakat diukur dengan ada tidaknya penyaluran zakat berdasarkan laporan dana dan penggunaan zakat yang dipublikasikan dalam laporan keuangan tahunan. Penelitian ini menggunakan 11 sampel Bank Umum Syariah di Indonesia yang terdaftar di Otoritas Jasa Keuangan (OJK) pada periode 2020-2022 dengan menggunakan metode purposive sampling. Data diperoleh dari laporan keuangan tahunan, laporan good corporate governance, dan laporan keberlanjutan. Data diolah menggunakan IBM SPSS Statistic versi 22. Hasil Penelitian menunjukkan bahwa Islamic Corporate Governance berpengaruh negatif signifikan terhadap kinerja keuangan bank umum syariah, Islamic Social Reporting dan pengelolaan zakat berpengaruh positif signifikan terhadap kinerja keuangan bank umum syariah.
Peningkatan Pengetahuan tentang Bakterial Vaginosis sebagai Faktor Risiko Kanker Serviks pada Wanita Usia Reproduktif
Authors: Rahayu Rahayu , Masfiyah Masfiyah , Dina Fatmawati , Stefani Harumsari
Published: August 2024

Kanker serviks merupakan kanker keempat terbanyak pada wanita di seluruh dunia. Infeksi persisten HPV merupakan faktor risiko utama untuk terjadinya kanker serviks. Tingginya angka kematian akibat kanker serviks di Indonesia disebabkan karena 95% wanita tidak menjalani pemeriksaan secara dini sehingga menyebabkan keterlambatan diagnosis dari kanker serviks dan menurunkan harapan hidup wanita. Kasus kanker serviks di Kota Semarang masih menunjukan angka yang cukup tinggi yaitu sebagai kanker terbesar kedua setelah kanker payudara serta merupakan wilayah dengan kasus kanker serviks tertinggi di provinsi Jawa tengah yaitu sebanyak 406 kasus. Sejauh ini program pencegahan kanker serviks terbatas pada pencegahan penyakit menular seksual, belum banyak yang menghubungkan dengan bakterial vaginosis. Tujuan dari pengabdian ini adalah untuk meningkatkan pengetahuan tentang Bakterial Vaginosis sebagai Faktor Risiko Kanker Serviks pada wanita usia reproduktif. Upaya tersebut diharapkan dapat meningkatkan upaya pencegahan terjadinya kanker serviks di Kota Semarang. Metode dari pengabdian ini adalah dengan penyuluhan dengan sasaran pasien wanita usia subur di Puskesmas Pandanaran dan Halmahera. Hasil dari kegiatan pengabdian masyarakat ini adalah terdapat peningkatan pengetahuan responden yang di tandai dengan 95% peserta memiliki nilai diatas 50 setelah mendapatkan penyuluhan. Cervical cancer is the world's fourth most common malignancy among women. Cervical cancer is greatly increased by persistent HPV infection. The high death rate from cervical cancer in Indonesia is caused by 95% of women failing to get early inspection, resulting in cervical cancer detection delays and a reduction in women's life expectancy. Cervical cancer cases remain quite high in Semarang City, namely as the second most common cancer after breast cancer and as the area with the highest cervical cancer cases in Central Java province. Cervical cancer prevention initiatives have thus far been focused to avoiding sexually transmitted illnesses, with little focusing on bacterial vaginosis. The purpose of this service is to raise awareness of Bacterial Vaginosis as a Risk Factor for Cervical Cancer among women of reproductive age. It is hoped that these measures will help to strengthen efforts to prevent cervical cancer in Semarang. This treatment is provided through counseling to female suburban patients at the Pandanaran and Halmahera Community Health Centers. This community service activity resulted in an increase in respondents' knowledge, as seen by 95% of participants rating above 50 after getting counseling.
Пристрій пеленгації випромінювання безпілотних літальних апаратів з покращеною характеристикою спрямованості
Authors: Гризо А. А. , Костиря О. О. , Додух О. М.
Published: August 2024

У статті наведено досвід розробки антенного пристрою, оптимізованого на роботу у діапазоні від 860 МГц до 1020 МГц з покращеною пеленгаційною характеристикою та прийнятними масогабаритними характеристиками. Антенна система побудована у вигляді синфазної чотириелементної решітки. Розрахунковим методом отримано її діаграми спрямованості для різних частот діапазону. Показано, що розроблена антенна система забезпечує покращення точності пеленгації методом максимуму в три рази та збільшення дальності дії удвічі. Експериментально виміряно коефіцієнт стоячої хвилі розробленої антенної решітки, показано, що він не перевищує значення 1,6 в усьому частотному діапазоні.
Оцінка впливу додаткового бронезахисту на стійкість руху та керованість автомобілів
Authors: Подригало М. А. , Яровий Г. Г. , Горєлишев С. А.
Published: August 2024

У статті розглянуті питання оцінки впливу додаткового бронезахисту на стійкість та керованість автомобіля. Визначено вплив додаткового бронювання на змінення горизонтальної і вертикальної координат центра мас автомобіля та отримані умови забезпечення стійкості броньованого автомобіля. Отримана формула кутового прискорення може використовуватися для оцінювання керованості броньованих автомобілів. Крім того, розглянуто питання розрахунку власних коливань автомобіля (рискання) в площині дороги при додатковому бронюванні.
Аналіз способів розв’язання балістичної задачі при стрільбі по повітряних цілях
Authors: Константінов А. О. , Урсол О. В. , Рекало О. А. , Бердочник А. Д. , Сургай В. І.
Published: August 2024

В статті розглядається питання вдосконалення методів прицілювання та стрільби по безпілотних літальних апаратах (БпЛА), акцентуючи на важливості ефективної протиповітряної оборони (ППО) в сучасних воєнних конфліктах. В статті зосереджується увага на БпЛА II класу, оскільки їх використання на полі бою стрімко зростає, що вимагає розробки сучасних, точних і надійних методів їх знищення. У статті детально аналізуються існуючі підходи до розв'язання балістичної задачі, включаючи чисельне інтегрування диференційних рівнянь та використання аналітичних формул для визначення необхідних балістичних поправок. Авторами порівнюються ефективність різних методів, виходячи з критеріїв точності прицілювання та ймовірності ураження цілей. Також розглядається вплив зовнішніх чинників, таких як вітер та зміни температури, на траєкторію польоту снарядів і ракет. Особлива увага була приділена адаптації теоретичних моделей до реальних умов бойових дій з метою підвищення оперативності та надійності застосування розроблених методів. Наголошується увага на необхідності подальшої модернізації зенітного ракетного та артилерійського озброєння і вдосконалення методики тренувань обслуговуючого персоналу з огляду на зростаючі вимоги до точності і швидкості реагування систем ППО, а також на важливості інтеграції новітніх технологій і дослідницьких розробок у сфері ППО, щоб ефективно протистояти загрозам від використання БпЛА на полі бою.