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All Journal Journal of Tropical Life Science : International Journal of Theoretical, Experimental, and Applied Life Sciences CAKRA KIMIA (Indonesian E-Journal of Applied Chemistry) Jurnal Kimia (Journal of Chemistry) Buletin Udayana Mengabdi Jurnal Veteriner Bumi Lestari Ecotrophic, Journal of Environmental Science Kappa Journal International Journal of Engineering and Emerging Technology Jurnal Media Sains Jurnal Syntax Transformation
I Nengah Simpen
Program Studi Kimia FMIPA Universitas Udayana, Bukit Jimbaran, Bali
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Selection of High Oil Yielding Trees of Millettia pinnata (L.) Panigrahi, Vegetative Propagation and Growth in the Field Ni Luh Arpiwi; I Made Sutha Negara; I Nengah Simpen
Journal of Tropical Life Science Vol. 7 No. 3 (2017)
Publisher : Journal of Tropical Life Science

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.11594/jtls.07.03.11

Abstract

Millettia pinnata (L.) Panigrahi is a potential legume tree that produces seed oil for biodiesel feedstock. The initial step for raising a large-scale plantation of the species is selection of high oil yielding trees from the natural habitat. This is followed by vegetative propagation of the selected trees and then testing the growth of the clone in the field.  The aim of the present study was to select high-oil yielding trees of M. pinnata, to propagate the selected trees by budding and to evaluate the survival and growth of budded plants in the field. Pods were collected from 30 trees in Lovina Beach, Buleleng Regency, Bali. Oil was extracted from seeds using soxhlet with hexane as a solvent.  The high oil yielding trees were propagated by budding using root stocks grown from M. pinnata seeds.  Scions were taken from young branches of selected trees. Incision was made on rootstock and the same size of cut was made on a scion containing a single bud.  The scion was inserted to the incision of rootstock then closed tightly using plastic strips.   The plastic was removed when the scion grew into a little green shoot. One month after plastic removal, the scion union grew into a single shoot and then the budded plants were removed to polybags. Budded plants were planted in the field of Bukit Jimbaran, Badung Regency, Bali with 4 × 4 spacing. Results showed all budded plants successfully grow new shoots. Two months after planting the survival of budded plants was 100%. Plant height increased by 22.13 cm, stem diameter increased by 2.43 mm and the number of compound leaf increased by 2.08.  It can be concluded that four high oil yielding trees were selected from Lovina Beach and successfully propagated by budding. Survival of budded plants was 100% with vigorous growth.
REDUKSI KOMPONEN TOKSIK DARI LIMBAH CAIR GARMEN MENGGUNAKAN BIO-ANORGANIK-SORBEN ARANG TULANG Dwi Adhi S, Ni Gusti Ayu Made; Simpen, I Nengah; Putra, Anak Agung Bawa
CAKRA KIMIA (Indonesian E-Journal of Applied Chemistry) Vol 5 No 1 (2017)
Publisher : Graduate Program of Applied Chemistry, Udayana University, Bali-INDONESIA

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (214.669 KB) | DOI: 10.24843/CK.2017.v05.i01.p03

Abstract

ABSTRAK: Tujuan penelitian ini adalah mempelajari kemampuan adsorpsi arang tulang sapi teraktivasi NaOH 0,4 M untuk menurunkan (reduksi) karakteristik tingkat kekeruhan, COD (chemical oxygen demand), kandungan Cr dan Pb dari limbah garmen yang dibandingkan dengan tanpa aktivasi. Kemampuan adsorpsi arang tulang tanpa dan teraktivasi (bio-anorganik-sorben) terhadap karakteristik limbah tersebut dikaitkan dengan karakterisasi (keasaman permukaan, jumlah situs aktif, gugus fungsi dan luas permukaan spesifik) serta waktu dan volume interaksi optimum. Hasil yang diperoleh bahwa aktivasi arang tulang dengan larutan NaOH 0,4 M dapat meningkatkan karakteristiknya (keasaman permukaan, jumlah situs aktif, intensitas gugus fungsi O-H dan luas permukaan spesifik) dibandingkan dengan yang tanpa aktivasi. Aktivasi NaOH pada arang tulang dapat meningkatkan kemampuan adsorpsi dalam menurunkan tingkat kekeruhan, COD, dan kandungan Cr dan Pb dari sampel limbah cair garmen dibandingkan dengan kemampuan arang tanpa aktivasi. Waktu interaksi optimum yang diperlukan dalam menurunkan karakteristik tingkat kekeruhan dan COD adalah 90 menit, dengan volume interaksi optimum 20 mL. ABSTRACT: The aim of this reseach was to study the adsorption ability of cow bone charcoal activated with 0.4 M NaOH to reduce the turbidity level, the chemical oxygen demand (COD), the Pb and Cr content of garment waste water and to compare with the non-activated ones. The adsorption ability of both activated and non-activated bone charcoal (bio-inorganic-sorbent) was related to their characteristics which are the surface acidity, the active sites, the fuction groups, the specific surface area, the volume and time optimum interaction as well. The result showed that activation can increase the surface acidity, the active sites, the O-H fuction groups intensity and the specific surface area compared with non-activated ones. The activated charcoal significantly reduced the COD and the turbidity level, the Pb and Cr content of garment waste water comparing with the non-activated ones. Time contact optimum to reduce its characteristics is 90 minutes and volume interaction optimum is 20 mL.
OPTIMASI RASIO MOLAR DAN WAKTU REAKSI PADA PEMBUATAN BIODIESEL DARI MINYAK BIJI MALAPARI (Pongamia Pinnata L.) DENGAN KATALIS ABU SEKAM PADI TERMODIFIKASI LITIUM Tri Lestari, Komang Ayu; Simpen, I Nengah; Santi, Sri Rahayu
CAKRA KIMIA (Indonesian E-Journal of Applied Chemistry) Vol 5 No 1 (2017)
Publisher : Graduate Program of Applied Chemistry, Udayana University, Bali-INDONESIA

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (559.34 KB) | DOI: 10.24843/CK.2017.v05.i01.p06

Abstract

ABSTRAK: Minyak biji malapari merupakan bahan baku yang potensial untuk produksi biodiesel. Penelitian ini mempelajari optimasi rasio molar minyak:metanol dan waktu reaksi pada produksi biodiesel menggunakan minyak biji malapari dalam reaksi transesterifikasi dengan katalis abu sekam padi termodifikasi litium (Li). Variasi parameter yang digunakan untuk mendapatkan kondisi optimum yaitu rasio molar minyak:metanol dengan perbandingan 1:6; 1:9 dan 1:12 dengan waktu reaksi 150, 180, dan 210 menit menggunakan massa katalis 3% pada suhu reaksi 60-65OC. Kebasaan permukaan, situs aktif, dan morfologi permukaan katalis heterogen sebelum transesterifikasi (Li-ASP1) dan setelah transesterifikasi (Li-ASP2) dikarakterisasi. Hasil penelitian menunjukkan bahwa yield biodiesel tertinggi yaitu 88,37% diperoleh pada rasio molar minyak:metanol sebesar 1:9 dengan waktu reaksi 150 menit. Biodiesel tersebut telah memenuhi Standar Nasional Indonesia (SNI) 04-7182-2006 dengan massa jenis, viskositas, bilangan asam, bilangan iod, kadar air, dan bilangan setana berturut-turut sebesar 885,3 kg/m3; 5,75 cSt; 0,27mgKOH/g; 45,89 g I2/100g biodiesel, 0,01% dan 65,13. Nilai kebasaan permukaan katalis Li-ASP1 yaitu ±mmol.g-1 lebih besar dibandingkan dengan nilai kebasaan katalis Li-ASP2 sebesar ±mmol.g-1, situs aktif katalis Li-ASP1 sebesar 1,2103 x 1022 atom g-1 memiliki nilai yang lebih tinggi dibandingkan katalis Li-ASP2 sebesar x 1022 atom g-1. Morfologi permukaan katalis Li-ASP1 dan Li-ASP2 menunjukkan bahwa distribusi pori terlihat kurang homogen dengan bentuk partikel yang terdistribusi secara tidak merata. ABSTRACT: Pongamia oil is a potential oil for producing biodiesel. The aim of this research is to find the optimum conditions of transesterification rection of pongamia oil using lithium-modified rice husk ashes (Li-ASP) in producing biodiesel. The molar ratio of oil:methanol (1:6; 1:9; and 1:12) and the reaction time (150; 180; and 210 minutes) were used as parameters using 3% (w/w) of the catalyst at reaction temperature of 60-65oC. Moreover, the heterogeneous catalysts before the transesterification (Li-ASP1) and after transesterification (Li-ASP2) were characterized by their surface alkalinities, active sites and surface morphologies. The results showed that the highest biodiesel yield of 88,37% was gained at molar ratio of oil:methanol of 1:9 and 150 minutes of the reaction time. The obtained biodiesel fulfills the Indonesian Nasional Standards (SNI 04-7182-2006) with values of density, viscosity, acid number, iod number, water content, and cetane number 885.3kg / m3; 5.75 cSt; 0,27mgKOH/g; 45.89 g I2/100g biodiesel; 0.01%; and 65.13, respectively. The surface alkalinity of Li-ASP1 of ±mmol.g-1which is higher than the one of Li-ASP2 of ±mmol.g-1. The active sites of Li-ASP1 of 1.2103 x 1022 atoms g-1 are higher than the ones of Li-ASP2 catalyst of 0.6414 x 1022 atoms g-1. The surface morphologies of both Li-ASP1 and Li-ASP2 indicate that non-homogenous pore distribution showing the unevenly distributed particles.
Optimasi Slice Thickness dengan Nilai Signal to Noise Ratio dan Contrast to Noise Ratio untuk Meningkatkan Kualitas Citra MRI Genu Anastasia Victor, Agnes Maria Salvi; Sutapa, Gusti Ngurah; Gunawan, A. A. Ngurah; Sandi, I Nengah; Rupiasih, Ni Nyoman; Simpen, I Nengah
Kappa Journal Vol 9 No 1 (2025): April
Publisher : Universitas Hamzanwadi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29408/kpj.v9i1.29591

Abstract

Research has been conducted on the effect of slice thickness variation on the quality of Genu MRI images. This study was conducted at the Radiology Installation of Bali Mandara Hospital using primary data from Genu MRI examination results.The independent variable in this study is the variation of slice thickness values of 3, 5, and 7 mm. There were 30 patientsmeasured and the tissues analyzed were ligament, bone, fat, and noise as background using the ROI method and the segmentation results wereresults were taken at the mean value and standard deviation in the background. The difference in SNR and CNR values due to variations in slice thickness values can be tested using the Factorial Anova test. The results of this study obtained that there is an effect of slice thickness variation on SNR and CNR values that will have an impact on the quality of MRI Genu images. The greater the slice thickness value analyzed, the greater the SNR and CNR values produced and the better the image quality. In ligament tissue, the average SNR values of 3, 5 and 7 mm are 23.830; 36.594; and 50.524, respectively. In bone tissue, 191.352; 277.399, and 344.170 were obtained. In fat tissue, SNRs of 9,460, 292,022, and 367,463 were obtained. Changing the slice thickness will directly affect the SNR. It can be seen that the higher the slice thickness value given, the higher the SNR and CNR values for each tissue evaluated and the longer the scanning time required. In the slice thickness variation.
Radiation Dose Determination and Body Mass Index (BMI) Evaluation in Abdomen CT Scan Examination Patients Using the Size-Specific Dose Estimate (SSDE) Method Prawistya Putra, I Made Gede Mas; Sutapa, Gusti Ngurah; Kasmawan, I Gde Antha; Made Suryatika, Ida Bagus; Putra Adnyana, I Gusti Agung; Simpen, I Nengah
Kappa Journal Vol 9 No 1 (2025): April
Publisher : Universitas Hamzanwadi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29408/kpj.v9i1.29592

Abstract

A study has been conducted on determining radiation doses and evaluating body mass index (BMI) in patients undergoing CT-Scan Abdomen examinations using the Size Specific Dose Estimate Method at the Bali Mandara Radiology Installation. One of the factors that influences the radiation dose received by patients is the Body Mass Index (BMI). The Size Specific Dose Estimate (SSDE) method is used to assess radiation doses based on patient size, which is often associated with BMI. This study aims to determine the estimated radiation dose of each patient and evaluate the relationship between BMI and the dose received. This study used a CT-Scan brand SIEMENS SOMATOM PERSPECTIVE (serial number 78068). The population in this study were patients undergoing CT-Scan Abdomen examinations. The sample consisted of several BMI categories, namely thin, normal, overweight, and obese. The analysis was carried out using linear regression to measure the relationship between BMI and SSDE, as well as a one-way t-test to see the difference in the average SSDE value in each BMI category. The results showed that each increase in one BMI category caused an increase in SSDE values ​​of 1,566 mGy. The R² value of 98.56% indicated that the BMI category explained almost all of the variability in SSDE values. However, a one-way t-test statistic showed that there was no significant difference in the average SSDE values ​​in the thin, normal, overweight, and obese categories (F count <F table, so H₀ was accepted). This study showed that patients with higher BMI tended to receive higher radiation doses, but the differences between categories were not statistically significant.
Law Enforcement of the Police Security Intelligence Unit in Uncovering Criminal Acts in the Buleleng Resort Police Area Simpen, I Nengah; Sihotang, Erikson; Sihotang, I Nyoman
Jurnal Syntax Transformation Vol 6 No 8 (2025): Jurnal Syntax Transformation
Publisher : CV. Syntax Corporation Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.46799/jst.v6i8.1102

Abstract

The main tasks and functions of Intelkam in the Polri environment are regulated by the Regulation of the Chief of the Republic of Indonesia National Police Number 22 of 2010 concerning the Organizational Structure and Work Procedures at the Regional Police Level and the Regulation of the Chief of the Republic of Indonesia National Police Number 23 of 2010 concerning the Organizational Structure and Work Procedures at the Resort Police and Sector Police Levels. Law Enforcement by the Police Intelligence Unit In uncovering criminal acts in the Buleleng Resort Police Area According to Law Number 2 of 2002 concerning the Indonesian National Police, the role and duties of the Buleleng Police intelligence unit are to search for and uncover criminal acts in order to reveal who committed the crime, so that the perpetrators can be sentenced in accordance with the Criminal Code. The obstacles faced by the police security intelligence unit in enforcing criminal law in order to uncover criminal acts in the Buleleng Resort Police area are in the form of internal obstacles within the police themselves and external obstacles. Internal obstacles are related to the quality of human resources of the police and external obstacles in the form of the community and related institutions not being able to cooperate in enforcing the law.
Uji Posisi Sumur Bor Terhadap Akuifer Menggunakan Metode Audio Magnetotelluric (ADMT) Silalahi, Dio Carpry Gunawan; Simpen, I Nengah; Putra, I Ketut; Nurmalasari, Ni Putu Yuni; Suryatika, Ida Bagus Made; Kasmawan, I Gde Antha
Kappa Journal Vol 7 No 3 (2023): Desember
Publisher : Universitas Hamzanwadi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29408/kpj.v7i3.21468

Abstract

Research has been carried out regarding the position test of the drilled well against the aquifer at the Jimbaran Unud Campus on May 12, 2023. The borehole test was carried out using the Audio Magnetotelluric (ADMT) method. To ensure that the water needs of all students at Udayana are met, it is necessary to conduct research on drilled wells at Udayana whether they are suitable for aquifer positions (groundwater). The purpose of this study was to determine the suitability of the position of the drilled well to the aquifer in the ground behind the UNUD Rectorate Building. Based on the interpretation of the results of the research conducted in this paper, the aquifer position sought on line 1 is at a distance of 0–9 m and 21–50 m at a depth of 100–200 m below the ground surface, while on line 2 it is at a distance of 7–50 m at a depth of 100–140 m. Because the position of the Udayana drilled well is at 22.2 m on line 1 and 26.7 m on line 2 with a depth of 74 m, the Udayana drilled well is not yet in the aquifer position sought in this study.
Co-Authors A A I Rahma Prabawanti A.A. B. Putra Anak Agung Gde Raka Dalem Anastasia Victor, Agnes Maria Salvi Arsa Arsa D. A. D. N. Dewi D.M Priyantha Wedagama Dewik Setiyawati Dwi Adhi S, Ni Gusti Ayu Made Dwi Anggraeni Putri Suandi Ewa Satriawijaya Febby Hartesa W G M Arya Sasmita G.M.A. Sasmita Gunawan, A. A. Ngurah Gusti Ngurah Sutapa Hudi Nurwendi I Gde Antha Kasmawan I Gede Andy Andika Parahita I Ketut putra, I Ketut I M. S. Negara I M. S. Negara I M. S. Negara I M. Trimastiya I Made Dupi Andika I Made Sutha Negara I Made Sutha Negara I Made Wisnu Adhi Putra I Nengah Artawan I Nengah Sandi I Nyoman Aribudiman I Nyoman Sumerta Miwada I Nyoman Suprapta Winaya I NYOMAN SUTARPA SUTAMA I Nyoman Widana I W BUDIARSA SUYASA I Wayan Redana I Wayan Suarsa I Wayan Sudiarta I Wayan Suditayasa I. M. S. Negara I.A.G. Widihati I.A.G. Widihati I.M.S. Negara Ida Ayu Agung Pradnyani Ida Bagus Made Suryatika Ika Umratul IM.S. Negara Ketut Gede Dharma Putra Komang Yogi Purnamawati M. Arsa M. Indra Dwitama M. W. Prayani Made Indra Dwitama Made Suryatika, Ida Bagus Muhammad Nasib N. K. A. Oktapiani N. K. D. Astuti N.M. Puspa wati Nanik Ayumi Ni G. A. M. Dwi Adhi Suastuti Ni Ketut Suminten Ni Komang Tria Paramita Septiari Ni LUH ARPIWI Ni Luh Eka Anggarayanti Ni Luh Nyoman Kebayantini Ni Luh Putu Suciptawati Ni Made Puspawati Ni Made Widya Pratiwi Ni Nyoman Pujianiki Ni Nyoman Rupiasih Ni Putu Diantariani Ni Putu Gita Bonita Dewi Ni Putu Widya Tironika Dewi Ni Wayan Trisnadewi, Ni Wayan Nurmalasari, Ni Putu Yuni O. Ratnayani O. Ratnayani O. Ratnayani Oka Ratnayani Olivia Carolyn Sitepu Prawistya Putra, I Made Gede Mas Putra Adnyana, I Gusti Agung Putra, Anak Agung Bawa Putu Suarya R. Dalem S. R. Mustikawati Sihotang, Erikson Sihotang, I Nyoman Silalahi, Dio Carpry Gunawan Sitanggang, Katrin Walensky Siti Helmyati Siti Zulaikah Sri Rahayu Santi Tri Lestari, Komang Ayu W. A. Fauzi Y. N. Handayani Y. Ulfa