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Detection of Pb(II) and Cr(III) Using Dy(III) Ion with Pyrazoline Derivatives Ligand
Get PDFExposure to heavy metal ions Pb2+ and Cr3+ in Indonesia is getting more attention, especially in various industries and transportation. The sensor complex compound Dy3+ with fluorescence-based pyrazoline-derived ligands (fluorosensor) has the potential to detect heavy metal ions Pb2+ and Cr2+. This research was initiated by synthesizing the pyrazoline derivative ligand and then reacting it with Dy3+ metal ion. The formed Dy3+ complex compounds was then characterized using spectroscopic methods. The results of scanning complex compounds using a UV-Vis spectrophotometer obtained two maximum wavelengths namely at 255 and 359 nm are indicating the presence of a transition type n→π* and π→π*. The results of fluorescence spectrophotometer analysis obtained maximum fluorescence intensity of Dy3+ complex compound was in the wavelength at 370 nm with fluorescence intensity of 4273 a.u. Fluorescence based sensor studies of the Dy complex when Pb2+ and Cr3+ metal ions were added showed changes in fluorescence intensity so that the fluorosensor type was obtained for the Dy3+ metal ion complex compound with Pb2+ and Cr3+, namely "turn-on-off" and "turn-off" respectively
Pengaruh Arus Kas Dan Laba Akuntansi Terhadap Return Saham Perusahaan LQ-45 di Bursa Efek Indonesia Tahun 2019 THE EFFECT OF CASHFLOW AND ACCOUNTING PROFIT ON STOCK RETURNS OF LQ-45 COMPANIES ON THE INDONESIA STOCK EXCHANGE FOR 2019
Get PDFDalam penelitian ini, dampak arusskas dan labaaakuntansi terhadap return saham perusahaannLQ-45 yang terdaftar di BursaaEfek Indonesia untuk tahun 2019 diuji dan dianalisis. Data sekunder digunakan dalam penelitian ini. Pengambilan sampel menerapkan teknik purposiveesampling dan analisissregresi linier berganda digunakan untuk pengujian hipotesis. Arusskassoperasi, arus kasspendanaan, arusskas investasi, dan labaaakuntansi merupakan variabel bebas.rReturn saham merupakan variabel terikat. Hasil temuan dalam penelitian menunjukkan arusskas operasional dan arusskas investasi secara parsialttidak memiliki dampak yang signifikan terhadappreturnnsaham. Sebaliknya Arus kas pendanaan dan laba akuntansi memiliki dampak yang signifikanbterhadap return saham..Secara bersama-sama, arus kasooperasi, arusskassinvestasi, arusskas pendanaanndan labaaakuntansi memiliki dampak yang signifikannterhadap return saham.
Pengaruh Komposisi Media Tanam dan Interval Penyiraman Terhadap Laju Pertumbuhan Bibit Kopi Robusta
Get PDFVarious mixtures of planting media and watering with predetermined intervals are used to support the growth process of Robusta coffee seedlings in the early stages of plant cultivation. The aim of this research is to determine how various planting media compositions and watering intervals influence the growth rate of Robusta coffee seedlings. This study used a Randomized Block Design (RBD) with three replication blocks and a 3x3 factorial pattern as an experimental design. The two aspects studied were watering interval (I) and plant media (M). The planting media factor (M) consists of three levels: M0 is top soil media, M1 is top soil and 2:1 TKKS media, and M2 is top soil and 2:1 manure media. The watering interval factor (I) has three levels: I0 indicates a one-day watering interval, I1 indicates a two-day watering interval, and I2 indicates a three-day watering interval. The variables observed included growth rate, dry weight, number of leaves, root length, and plant height. Based on the research findings, there was no interaction between the combination of watering intervals and planting media treatments. However, at the age of 60 HST, 90 HST, and 120 HST there was a significant difference in the variable of plant height between the treatment intervals of watering once every two days (I1), watering once a day (I0), and watering treatment once every three days (I2). At the age of 60 HST there was also a difference in the variable of root length between the planting media treatments. There was a significant difference between the treatment of watering once a day (I0) and the treatment of watering once every two days (I1) in the variable of dry weight at 120 HST. The results of the slope analysis of the line on the logistic pattern growth curve in all treatments showed no significant difference and interaction between the combinations of treatments tested on the variables of plant height and root length.
Berbagai campuran media tanam dan pemberian air dengan interval tertentu diuji untuk mendukung proses pembibitan kopi robusta. Tujuan penelitian ini adalah untuk mengetahui bagaimana laju pertumbuhan bibit kopi Robusta dipengaruhi oleh berbagai komposisi media tanam dan interval penyiraman. Penelitian ini menggunakan Rancangan Acak Kelompok (RAK) dengan tiga blok ulangan dan pola faktorial 3x3 sebagai rancangan percobaan. Dua faktor yang diteliti adalah interval penyiraman (I) dan media tanaman (M). Faktor media tanam (M) terdiri dari tiga taraf: M0 adalah media top soil, M1 adalah top soil dan media TKKS 2:1, dan M2 adalah top soil dan media pupuk kandang 2:1. Selain itu, Faktor interval penyiraman (I) yang diuji mencakup tiga taraf: I0 menunjukkan interval penyiraman satu hari, I1 menunjukkan interval penyiraman dua hari, dan I2 menunjukkan interval penyiraman tiga hari. Variabel yang diamati meliputi laju pertumbuhan, berat kering, jumlah daun, panjang akar, dan tinggi tanaman. Berdasarkan temuan penelitian, tidak terdapat interaksi antara kombinasi interval penyiraman dan perlakuan media tanam. Namun pada umur 60 HST, 90 HST, dan 120 HST terdapat perbedaan nyata variabel tinggi tanaman antara interval perlakuan penyiraman dua hari sekali (I1), penyiraman sehari sekali (I0), dan perlakuan penyiraman tiga hari sekali (I2). Pada umur 60 HST juga terdapat perbedaan variabel panjang akar antar perlakuan media tanam. Terdapat perbedaan nyata antara perlakuan penyiraman satu kali sehari (I0) dengan perlakuan penyiraman dua hari sekali (I1) pada variabel berat kering 120 HST. Hasil analisis kemiringan garis pada kurva pertumbuhan pola logistik di semua perlakuan menunjukkan tidak ada perbedaan nyata dan interaksi antar kombinasi perlakuan yang diujicobakan pada variabel tinggi tanaman dan panjang akar
Characterization of Organic Soap Synthesized from Samia cynthia ricini Cocoon Extract and Its Antibacterial Potential
Get PDFIn a modern era that increasingly values health and sustainability, the demand for natural and environmentally friendly personal care products continues to grow. One response to this trend is the development of organic soaps produced from various natural ingredients. In this study, organic soap using Samia cynthia ricini silkworm cocoon extract has been synthesized. This study aims to assess the quality of organic soap synthesized from silk cocoon extract based on the Indonesian National Standard (SNI) quality criteria and its antibacterial potential. Silk cocoon soap is made from a mixture of silk cocoon extract with palm oil, coconut oil, olive oil, sodium hydroxide, and water. The quality measurements include organoleptic tests, pH, moisture content, total fat, insoluble substance in ethanol, and free fatty acids, based on SNI No. 4085: 2017 and 3532: 2016. Antibacterial testing is conducted by disc diffusion. The results showed that the synthesized silk cocoon soap has a yellowish-white color, a hard density, and no odor. The quality criteria of the soap meet the established standards, with a pH of 9.66, a water content of 11.47%, total fat of 75.00%, ethanol-insoluble substances of 0.52%, and free fatty acids of 1.58%. The soap also demonstrates antibacterial potential that describes by a larger diameter of the inhibitory area against Staphylococcus aureus bacteria
Silica Gel From Bagasse Ash for Methylene Blue Adsorption
Get PDFMost silica sources are from non-renewable natural sand or rock materials, which affect the element's diminishing availability in the environment. Because bagasse ash has a relatively high silica concentration, it can be used as a silica source to manufacture silica gel. HCl is added during the sol-gel process of silica gel synthesis. The silica gel's characterization employs FTIR, XRD, and SEM instruments. Characterization results showed that silica gel contains silanol groups identified by the appearance of vibrations at the wavenumber of 3383,93 cm-1 and 1635,17 cm-1. Vibrations of the siloxane group appear at the wavenumber of 1020,83 cm-1 and 579,88 cm-1. Silica gel diffractogram showing dilated diffraction peaks at 2q = 22,90ᵒ. Silica gel has potential as an adsorbent in adsorbing methylene blue dye. The ideal parameters for the methylene blue adsorption process are pH 10 and 45 minutes of contact time., silica gel weight of 0.1 g, and methylene blue concentration of 100 mg/L. Using the Langmuir isotherm rule, the silica gel of bagasse ash has a high adsorption capacity of 56.818 mg/g
PENDAMPINGAN POLA ADAPTASI MASYARAKAT PESISIR TERHADAP KELANGKAAN SUMBER AIR BERSIH DI NEGERI ITAWAKA KABUPATEN MALUKU TENGAH
Get PDFThe scarcity of clean water sources is a significant problem in many coastal communities, where access to clean water is limited, and water quality is threatened by pollution and climate change. The community service program (PKM) aims to educate coastal communities on adaptation patterns to the scarcity of clean water sources through effective counseling and assistance to increase community resilience. The extension method uses a participatory approach by involving the community in education regarding introducing water filtration media and training in water treatment technology using simple technology. The educational process for coastal communities in Itawaka State regarding the introduction of filtration media originating from local resources and recognizing adaptation techniques for the use of simple technology such as simple and cheap water filtration systems and efficient storage systems can help overcome the scarcity of clean water, as well as maintaining water filtration systems sustainable clean
Potential Blending of Short Residues, Automotive Diesel Oil (ADO) and Kerosene for Marine Fuel Oil (MFO) Low Sulphur 180 Export Quality at PT. XYZ Using H-CAMS Simulation
Get PDFMarine Fuel Oil (MFO) Low Sulfur is a ship fuel for engines that have an rpm <300, which has a maximum sulfur content of 0.5% wt and a Kinematic Viscosity limit at a temperature of 50 ℃ with a maximum of 180 CSt. Blending MFO products has the potential to meet international market demand and optimize sales of MFO products in domestic and international markets. The change in specifications requested by PIMD (P International Marketing & Distribution) refers to the Decree of the Director General of Oil and Gas No. 0179.K/10/DJM.S/2019. This research aims to meet international market demand so that MFO (Marine Fuel Oil) products with new specifications are needed. This research uses a blending optimization method using Short Residue (SR), Automotive Diesel Oil (ADO), and Kerosene (KR) using simulation using H-CAMS software. This research focuses more on the critical values of MFO products, namely Density, Kinematic Viscosity, Flash Point, and Pour Point analysis. The blending simulation process has 12 variations between SR: ADO: KR. As the composition of ADO and Kerosene increases in the blending ratio, it causes a decrease in the Density, Flash Point, Kinematic Viscosity, and Pour Point values. In this research, the most optimum blending formula was found, namely formulas 4, 5, 10, and 11, all critical specifications in the manufacture of the MFO 180 LS product were met except for the Pour Point parameter, so this research needs to be continued by reducing the pour point value
PERANAN ANGGARAN SEBAGAI ALAT PENGENDALIAN DALAM MENINGKATKAN KINERJA KEUANGAN PADA PERUSAHAAN DAERAH JASA TRANSPORTASI (PDJT) KOTA BOGOR
Get PDFTujuan penelitian dalam penelitian ini, yaitu mengetahui penyusunan anggaran, kinerja keuangan, serta peranan anggaran sebagai alat pengendalian dalam meningkatkan kinerja keuangan pada PDJT Kota Bogor.
Metodologi penelitian yang digunakan adalah metode deskriptif kuantitatif. Jenis data yang dikumpulkan dalam penelitian ini merupakan data sekunder yang diperoleh dari PDJT Kota Bogor. Teknik analisa data yang digunakan, yaitu untuk penyusunan anggaran melakukan analisis trend garis lurus metode kuadrat terkecil dan untuk evaluasi biaya menggunakan analisis varians atau membandingkan antara anggaran dengan realisasi. Sedangkan untuk menganalisis peningkatan kinerja keuangan digunakan analisis rasio dan analisis kesehatan keuangan.Hasil penelitian dapat disimpulkan bahwa untuk, penyusunan anggaran PDJT adalah ditetapkan kenaikkan sepuluh sampai dengan lima belas persen dari tahun sebelumnya. Sedangkan, penulis menggunakan analisis trend garis lurus metode kuadrat terkecil yang hasilnya menunjukkan bahwa lebih baik menggunakan ketetapan sepuluh sampai dengan lima belas persen. Kinerja keuangan selama lima tahun terakhir mengalami penurunan yang sangat drastis dan kesehatan keuangan PDJT menurut analisis penilaian kinerja keuangan BUMN/BUMD dikategorikan tidak sehat. Peranan anggaran terhadap kinerja keuangan tidak baik, karena anggaran tidak menunjukkan hasil yang baik untuk kinerja PDJT Kota Bogor.
 
DIMENSI LOYALITAS PELANGGAN PADA PT. TMS FASHION (HK) INDONESIA
Get PDFKepercayaan memberi pengaruh yang paling besar terhadap loyalitas pelanggan. sehingga penting bagi perusahaan untuk melakukan strategi dalam rangka menjaga dan meningkatkan kepercayaan pelanggan, dalam hal interaksi antara pelanggan dan produsen, ada berbagai tingkatan hubungan, dari yang paling lemah sampai sangat kuat. Semakin kuat ikatan antara pelanggan dan produsen, semakin meningkatkan loyalitas PT. TMS Fashion (HK) Indonesi
KEANEKARAGAMAN JENIS ANGGREK DI JALUR PENDAKIAN WIRAYANA GUNUNG CAKRABUANA KABUPATEN MAJALENGKA
Get PDFThe existence of orchids in nature continues to decline due to habitat destruction and overexploitation. Conservation efforts that have been carried out so far have often experienced difficulties due to insufficient data and information as a basis for management, including conservation areas. The more widespread forest destruction will result in these species being threatened with extinction. This study aims to determine the diversity of orchid species, on the Wirayana Mount Cakrabuana Climbing Path. The information is expected to provide an initial contribution to the area management and orchid conservation efforts on the Wirayana Mount Cakrabuana Climbing Path. This research was conducted by means of a vegetation survey, sampling and documentation by exploring the existence of orchids. The sampling technique used the path transect method. The number of transects used is one line transect with a line length of 1500 m with a total of 22 sample plots. Data analysis was carried out by calculating the Important Value Index (INP), Species Dominance Index (Di) and Species Diversity Index (H'). The results showed that in the natural forest area of Mount Cakrabuana there were 22 species of individuals which included 7 species of terrestrial orchids and 15 species of epiphytic orchids with a total of 243 individuals found. From the results of the calculation of species diversity, it is stated that the diversity of orchid species in the natural forest area of Mount Cakrabuana is classified as moderate (2,973). This information is very important, especially for area managers in preserving the biodiversity of Mount Cakrabuana, especially orchids in the future