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KARET ALAM HIDROGENASI SEBAGAI MATRIKS POLIMER ALTERNATIF PADA KOMPOSIT ELASTOMER BANTALAN JEMBATAN Puspitasari, Santi; Chalid, Mochammad; Ferdian Falaah, Asron; Cifriadi, Adi
Jurnal Penelitian Karet JPK : Volume 41, Nomor 2, Tahun 2023
Publisher : Pusat Penelitian Karet - PT. Riset Perkebunan Nusantara

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22302/ppk.jpk.v41i2.872

Karet alam hidrogenasi yang terbuat melalui modifikasi kimiawi lateks karet alam secara transfer hidrogenasi katalitik berpotensi digunakan sebagai matriks polimer alternatif pada karet bantalan jembatan. Penelitian ini dilakukan untuk mengkaji peluang pemanfaatan karet alam hidrogenasi pada pembuatan karet bantalan jembatan. Karet alam hidrogenasi yang digunakan pada penelitian ini disintesis pada variasi konsentrasi hidrasin hidrat (40 dan 42,5 bsk) terhadap hidrogen peroksida (30 dan 35 bsk) suhu 40oC dan 50oC. Eksperimen diawali dengan persiapan kompon karet menggunakan mesin giling terbuka dilanjutkan dengan pembuatan vulkanisat karet pada mesin cetak hidraulik. Vulkanisat karet dikarakterisasi sifat fisik dan mekanik mengikuti parameter yang tercantum dalam SNI 3967:2013. Karet SIR 20 digunakan sebagai pembanding. Hasil pengujian menunjukkan bahwa karet alam hidrogenasi yang diolah dari 40 bsk hidrasin hidrat dan 35 bsk hidrogen peroksida pada suhu 40oC ditetapkan sebagai matriks polimer alternatif yang paling menjanjikan untuk produk karet bantalan jembatan. Vulkanisat karet bantalan jembatan dari karet alam hidrogenasi tersebut memiliki sifat fisik dan mekanik yang sesuai dengan persyaratan SNI 3967:2013 dan persentasi rentensi yang lebih tinggi daripada vulkanisat karet bantalan jembatan dari SIR 20.

PENGGUNAAN KOMPATIBILISER KARET ALAM EPOKSIDASI (ENR) PADA KOMPON TELAPAK BAN RAMAH LINGKUNGAN Fathurrohman, Muhammad Irfan; Kinasih, Norma Arisanti; Puspitasari, Santi; Arti, Dewi Kusuma
Jurnal Penelitian Karet JPK : Volume 42, Nomor 1, Tahun 2024
Publisher : Pusat Penelitian Karet - PT. Riset Perkebunan Nusantara

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22302/ppk.jpk.v42i1.890

Formulasi kompon telapak ban perlu dilakukan untuk mengoptimalkan kinerja ban ramah lingkungan (ban ECO). Formulasi telapak ban dilakukan pada karet non-polar berbahan pengisi silika dengan dan atau tanpa menggunakan kompatibiliser karet alam terepoksidasi (ENR). Penggunaan kompatibiliser ENR pada telapak ban ECO mampu meningkatkan dispersi bahan pengisi, yang ditandai dengan menurunnya nilai payne effect kompon B. Dispersi bahan pengisi yang baik lebih lanjut dapat meningkatkan interaksi fisik antar bahan pengisi dan bahan pengisi karet, karakteristik pematangan, kuat tarik, ketahanan kikis, dan cengkraman basah vulkanisat telapak ban ECO. Namun, sedikit menurukan interaksi kimia bahan pengisi-karet sehingga menurunkan apparent crosslink density kekerasan, young modulus, perpanjangan putus, dan ketahanan sobek dan meningkatkan ketahanan gelinding vulkanisat telapak ban ECO B. Maka formula kompon B perlu ditingkatkan untuk meningkatkan sifat mekanik vulkanisat dan efesiensi bahan bakar kendaraan.

Modified Natural Rubber Based on the Sulphur Curing System as Rubber Compound Formulation on Basic Design of Seismic Bearing Cifriadi, Adi; Sugita, Purwantiningsih; Kemala, Tetty; Nikmatin, Siti; Puspitasari, Santi; Falaah, Asron Ferdian; Wijaya, Usman
Jurnal Kimia Valensi Jurnal Kimia VALENSI, Volume 10, No. 2, November 2024
Publisher : Syarif Hidayatullah State Islamic University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15408/jkv.v10i2.39963

Indonesia is highly susceptible to earthquakes, with the southern and western coasts of Java and Sumatra being the most vulnerable regions. Due to this vulnerability, it is necessary to establish a culture of disaster mitigation in the most fertile and heavily populated islands to reduce the number of fatalities and economic losses caused by earthquakes. One of the promising real-world seismic base isolation methods is using a rubber seismic bearing constructed of rubber and metal layers. This study aimed to examine the typical behavior of natural rubber compounds subjected to various sulfur-curing processes as basic designs in the manufacture of rubber seismic bearings. The experiment was carried out by arranging the sulfur curing system into three categories, namely an efficient which applied N-cyclohexyl-2-benzothiazole sulfonamide (CBS)/Sulfur (S) ratio as 1.4/0.15 and 1.4/0.25, semi-efficient with CBS/S ratio of 1.4/1.4 and 1.4/1.7, and conventional with CBS/S ratio of 1.4/3.0 and 1.4/3.5. The results showed that the ideal modification condition for NR macromolecule chain found in seismic-bearing rubber compound was a semi-efficient sulfur curing system with a CBS/S ratio of 1.4/1.4. It suggested that a semi-efficient sulfur curing system was appropriate for developing rubber compound formulation for seismic rubber bearings, mainly for low-damping types.

Efektivitas Intervensi Buteyko Breathing Terhadap Kualitas Tidur Mahasiswa Keperawatan Abidin, Imam; Nurlianawati, Lia; Puspitasari, Santi
Jurnal Keperawatan Florence Nightingale Vol 7 No 2 (2024)
Publisher : Sekolah Tinggi Ilmu Kesehatan Stella Maris Makassar

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.52774/jkfn.v7i2.326

Poor sleep quality is a common issue among students, negatively impacting their physical health, mental well-being, and academic performance. Buteyko breathing technique is a non-pharmacological method that has the potential to improve sleep quality by normalizing breathing patterns. This study aims to analyze the effect of Buteyko breathing technique on the sleep quality of students. The research employed a pre-experimental design with a one-group pretest-posttest approach, utilizing the Pittsburgh Sleep Quality Index (PSQI) as an instrument. The sample consisted of 30 final-year nursing students with sleep disturbances, selected through purposive sampling. The intervention involved level 1 Buteyko breathing exercises conducted twice daily, in the morning and evening, over one week. Sleep quality was measured using the PSQI, and data analysis was performed using paired t-tests. The results showed that the mean sleep quality score decreased from 13.07 (poor category) before the intervention to 8.47 after the intervention (p = 0.000). The most significant improvement was observed in the sleep duration component, with a mean reduction of 0.9 points. The Buteyko breathing technique effectively improved the students' sleep quality and can be considered a complementary therapy for addressing sleep disturbances to students.

Efektivitas Intervensi Buteyko Breathing Terhadap Kualitas Tidur Mahasiswa Keperawatan Abidin, Imam; Nurlianawati, Lia; Puspitasari, Santi
Jurnal Keperawatan Florence Nightingale Vol 7 No 2 (2024)
Publisher : Sekolah Tinggi Ilmu Kesehatan Stella Maris Makassar

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.52774/jkfn.v7i2.326

Poor sleep quality is a common issue among students, negatively impacting their physical health, mental well-being, and academic performance. Buteyko breathing technique is a non-pharmacological method that has the potential to improve sleep quality by normalizing breathing patterns. This study aims to analyze the effect of Buteyko breathing technique on the sleep quality of students. The research employed a pre-experimental design with a one-group pretest-posttest approach, utilizing the Pittsburgh Sleep Quality Index (PSQI) as an instrument. The sample consisted of 30 final-year nursing students with sleep disturbances, selected through purposive sampling. The intervention involved level 1 Buteyko breathing exercises conducted twice daily, in the morning and evening, over one week. Sleep quality was measured using the PSQI, and data analysis was performed using paired t-tests. The results showed that the mean sleep quality score decreased from 13.07 (poor category) before the intervention to 8.47 after the intervention (p = 0.000). The most significant improvement was observed in the sleep duration component, with a mean reduction of 0.9 points. The Buteyko breathing technique effectively improved the students' sleep quality and can be considered a complementary therapy for addressing sleep disturbances to students.

Esterified Illipe Butter-Based Fatty Amine as a Bio-Based Multifunctional Additive for NR/BR Blends Reinforced with a Silica/Silane System in Green Tire Tread Development Fathurrohman, Mohamad Irfan; Puspitasari, Santi; Kinasih, Norma Arisanti; Arti, Dewi Kusuma
Journal of Applied Agricultural Science and Technology Vol. 9 No. 2 (2025): Journal of Applied Agricultural Science and Technology
Publisher : Green Engineering Society

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55043/jaast.v9i2.357

The sustainable rubber industry, particularly in the tire sector, is supported by the use of biomaterials such as multifunctional additives. Fatty amine, derived from the esterification of illipe butter, is considered a promising bio-based multifunctional additive for the development of green tires. This research aimed to investigate the effect of varying dosage of fatty amine on the properties of green tire treads based on NR/BR blends reinforced with a silica/silane system. DPG and unmodified illipe butter were used as comparative references. The "magic triangle of tire performance" was employed as a benchmark for evaluating green tire tread performance. The result indicated that both unmodified illipe butter and fatty amine functioned as bio based multifunctional additives, specifically serving as a bio-plasticizer (filler dispersant) and fast-delayed bio-accelerator, respectively. Therefore, they have the potential to substitute DPG in rubber formulations. The combination of unmodified illipe butter and fatty amine at dosages of 2.5 and 1.25 phr, respectively, exhibited similar behavior by enhancing rubber-filler interaction. Consequently, they meet the desirable criteria outlined in the magic triangle of tire performance.

Pengaruh Dialectical Behavior Therapy pada Perilaku Agresif: Tinjauan Sistematis dengan Narative Review Puspitasari, Santi; Rokayah, Cucu; Novianti, Wini Resna
Jurnal Penelitian Perawat Profesional Vol 7 No 2 (2025): April 2025, Jurnal Penelitian Perawat Profesional
Publisher : Global Health Science Group

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37287/jppp.v7i2.6298

Perilaku agresif merupakan penyebab utama kematian karena adanya resiko perilaku kekerasan, kemarahan yang berlebih karena sulitnya mengontrol emosi. Perlunya mengurangi perilaku agresif dilakukan suatu pencegahan yaitu menerapakan DBT (Dialectical Behavior Therapy) suatu intervensi terapi psikoteraupetik yang dapat membantu pasien dalam mengendalikan emosi, menerima keadaan sekarang, dan mengubah perilaku negatif yang dilakukan pasien sebelumnya ke arah perilaku yang lebih positif. Tujuan: mengetahui bagaimana efek Dialectical Behavior Therapy (DBT) terhadap pasien dengan perilaku agresif. Metode: Metode penelitian yang digunakan dalam literature riview ini berjenis narrative riview, sumber litretur yang digunakan dalam proses pencarian artikel yaitu database dari Pubmed, EBSCO dan kata kunci yang digunakan Dialectical Behavior Therapy, Mental Disorder, Anger, Aggressive Behavior. Hasil: menunjukkan bahwa DBT sangat efektif digunakan sebagai intervensi membantu pasien dengan perilaku agresif. Kesimpulan: bahwa efek dialectical behavior therapy (DBT) berpengaruh efektif terhadap pasien dalam perilaku agresif.

Adversity Quotient of Nursing Student Rokayah, Cucu; Apriliani, Senny; Jayanti, Tri Nur; Puspitasari, Santi
Indonesian Journal of Global Health Research Vol 5 No 4 (2023): Indonesian Journal of Global Health Research
Publisher : GLOBAL HEALTH SCIENCE GROUP

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37287/ijghr.v5i4.2817

Achievement of student learning outcomes often encounter various obstacles to reach their achievements. Obstructions to accomplishment that are regularly confronted by understudies are need of certainty, passiveness to inquire questions, destitute time administration, delaying on tasks/work, diminished inspiration to memorize, the impact of awful companions, follow-up variables, and family/personal issues . Academic intelligence isn’t enough to provide readiness for students when facing academic failure. Therefore, Adversity Quotient (AQ) intelligence is needed to achieve successful learning. This study aims to determine the Adversity Quotient of Nursing Students. This type of research uses quantitative research, with a population of 494 nursing students, a sample of 221 students with stratified random sampling technique. Data collection techniques using the Adversity Response Profile questionnaire. Data analysis using frequency distribution. The results showed that 98% of the Adversity Quotient of Nursing Students were in the moderate AQ category (Camper). Based on the results of the research, it is advisable for the academic supervisor to provide intervention to students in the form of academic guidance or counseling to explore the potential of nursing students and optimize it.

Analysis of the Dominant Factors Associated with the Incidence of Covid-19 in Prehospital and Intra-Hospital Nurses Khotimah, Nur Intan Hayati Husnul; Muslim, Dede Nur Aziz; Puspitasari, Santi; Imam, Haerul
International Journal of Research in Community Services Vol. 5 No. 2 (2024)
Publisher : Research Collaboration Community (Rescollacom)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.46336/ijrcs.v5i2.625

Nurses are the main lead in tackling the Covid-19 pandemic as if they are risking contracted by Covid-19. High stress during a pandemic has an impact on psychological problems, Personal Protective Equipment (PPE) usage, decision-making difficulty on triage, and fatigue in which those can decrease the immune systems. The aim of study was to identify the dominant factors related to the incidence of Covid-19 in nurses. This observational study used Cross Sectional Study design and consecutive sampling techniques at 136 respondents. Questionnaires was used as instruments tested by validity and reliability to measure Fatigue, Psychological Problems (Depression, Anxiety, Stress), Decision-Making Ability of Triage-EWS Screening Covid-19, Vaccination history, risks of exposure, PPE usage and Covid-19 Incidents. Dominant factor analysis was assessed using multivariate analysis by logistic regression test. Based on the results of the logistic regression test, it was found that the risk of exposure to Covid-19 was the dominant factor with the incidence of Covid-19 among nurses in the pre-intra-hospital settings with significance of the test results p value <0.0. Handling of Covid-19 incidents in health workers is crucial. It has been clear that the risk of exposure to people who are confirmed positive can increase the incidence of Covid-19, so it necessary to make prevention program by implementing physical distancing and increasing activities that impact on increasing of immunity.

Modified Natural Rubber Based on the Sulphur Curing System as Rubber Compound Formulation on Basic Design of Seismic Bearing Cifriadi, Adi; Sugita, Purwantiningsih; Kemala, Tetty; Nikmatin, Siti; Puspitasari, Santi; Falaah, Asron Ferdian; Wijaya, Usman
Jurnal Kimia Valensi Jurnal Kimia VALENSI, Volume 10, No. 2, November 2024
Publisher : Department of Chemistry, Faculty of Science and Technology Syarif Hidayatullah Jakarta State Islamic University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15408/jkv.v10i2.39963

Indonesia is highly susceptible to earthquakes, with the southern and western coasts of Java and Sumatra being the most vulnerable regions. Due to this vulnerability, it is necessary to establish a culture of disaster mitigation in the most fertile and heavily populated islands to reduce the number of fatalities and economic losses caused by earthquakes. One of the promising real-world seismic base isolation methods is using a rubber seismic bearing constructed of rubber and metal layers. This study aimed to examine the typical behavior of natural rubber compounds subjected to various sulfur-curing processes as basic designs in the manufacture of rubber seismic bearings. The experiment was carried out by arranging the sulfur curing system into three categories, namely an efficient which applied N-cyclohexyl-2-benzothiazole sulfonamide (CBS)/Sulfur (S) ratio as 1.4/0.15 and 1.4/0.25, semi-efficient with CBS/S ratio of 1.4/1.4 and 1.4/1.7, and conventional with CBS/S ratio of 1.4/3.0 and 1.4/3.5. The results showed that the ideal modification condition for NR macromolecule chain found in seismic-bearing rubber compound was a semi-efficient sulfur curing system with a CBS/S ratio of 1.4/1.4. It suggested that a semi-efficient sulfur curing system was appropriate for developing rubber compound formulation for seismic rubber bearings, mainly for low-damping types.

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