Garuda - Garba Rujukan Digital

ANALISIS KADAR KALSIUM OKSALAT PADA TEPUNG PORANG SETELAH PERLAKUAN PERENDAMAN DALAM LARUTAN ASAM (ANALISIS DENGAN METODE TITRASI PERMANGANOMETRI) Wardani, Ratih Kusuma; Handrianto, Prasetyo
Journal of Research and Technology Vol 5, No 2 (2019)
Publisher : Universitas Nahdlatul Ulama Sidoarjo

Show Abstract | Download Original | Original Source | Check in Google Scholar

Tubers included in the family Araceae contain a lot of calcium oxalate. High calcium oxalate consumption in the body can cause health problems. One of these examples is in the kidneys. Tubers with high levels of calcium oxalate, if immersed in acidic solutions, calcium oxalate levels can be reduced. In this research, immersion of porang flour in starfruit juice, lime juice and vinegar with the aim that the calcium oxalate content contained in it can be reduced. Calcium oxalate levels were analyzed by permanganometric titration method. The results of this study indicate that acidic solutions can reduce calcium oxalate levels in porang flour. Calcium oxalate levels were analyzed by permanganometric titration method. The results of this study indicate that acid solution can reduce calcium oxalate levels in porang flour. The 7% Averrhoa bilimbi juice solution was able to reduce calcium oxalate levels by 62.68%. The 5% lime juice solution gives better results than the Averrhoa bilimbi juice solution. The 5% lime juice solution can reduce calcium oxalate levels by 65.94%. The biggest decrease in calcium oxalate levels was shown in porang flour after soaking it with 20% vinegar acid solution, which amounted to 90.27%.

The Role of Academic Supervision and Communication on Teacher Performance Wardani, Ratih Kusuma; Santosa, Heru; Rahmawati, Desi
Journal of Education Research and Evaluation Vol 5, No 2 (2021)
Publisher : LPPM Undiksha

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23887/jere.v5i2.31597

The purpose of this study was to obtain information about the role of academic supervision and interpersonal communication. research place at public elementary schools in the administrative city of South Jakarta. This study used a survey method with path analysis techniques and a causal quantitative approach. The sample in this study was 81 teachers who were taken using simple random sampling technique or simple random sampling and the teachers who were the object of the research were determined using the sample technique formula from Slovin. The data analysis technique was performed using descriptive and inferential statistics by first doing the prerequisite analysis, namely population normality and regression analysis. The findings from the study that academic supervision activities and smooth interpersonal communication play a major role in improving teacher performance. Professional teachers will be able to manage learning activities well and will be able to provide motivation to students so that the goals of learning will be achieved and produce students who excel in their respective fields.

Analisis Kadar Kafein Dari Serbuk Teh Hitam, Teh Hijau dan Teh Putih (Camellia sinensis L.) Wardani, Ratih Kusuma; Ferry Fernanda, M. A. Hanny
Journal of Pharmacy and Science Vol. 1 No. 1 (2016): Journal of Pharmacy and Science
Publisher : Akademi Farmasi Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.53342/pharmasci.v1i1.48

ABSTRAKTeh diklasifikasikan menjadi 3 jenis yaitu teh hitam, teh hijau dan teh putih. Teh mengandung senyawa kafein yang dapat bermanfaat dan merugikan bagi tubuh. Senyawa kafein dalam teh dapat dipisahkan dengan metode ekstraksi cair-cair menggunakan kloroform dan penambahan CaCO3. Penentuan kadar kafein menggunakan metode spektrofotometri UV diukur pada panjang gelombang 275 nm. Kadar kafein dipengaruhi oleh suhu dan waktu penyeduhan. Semakin tinggi suhu dan lama waktu penyeduhan, kadar kafein dalam teh semakin meningkat. Kadar kafein dari berbagai jenis teh dari kadar yang tinggi ke rendah berturut-turut yaitu serbuk teh hitam, teh putih dan teh hijau dengan suhu penyeduhan 95áµ’C selama 10 menit.Kata Kunci: Teh hitam, teh hijau, teh putih, kafein, spektrofotometri UVABSTRACTTea is classified into three type, which are black tea, green tea and white tea. Tea contains caffeine compound that can be beneficial and harmful for the body. Caffeine compound in tea can be separated by liquid extraction method using chloroform and addition of CaCO3. The determination of the caffeine content measured by UV spectrophotometry at 275 nm. Caffeine level is influenced by temperature and brewing time. The highertemperature and the longer brewing time, the level of caffeine in tea increase. The caffeine content of various types of tea from high to low level respectively are black tea powder, white tea and green tea with temperature of 95áµ’C and 10 minutes brewing time.Keywords: Black tea, green tea, white tea, caffeine, UV spectrophotometry

Modifikasi Abu Bawah Batubara (Bottom Ash) Menggunakan Larutan Basa Kuat Natrium Hidroksida Wardani, Ratih Kusuma
Journal of Pharmacy and Science Vol. 3 No. 1 (2018): Journal of Pharmacy and Science
Publisher : Akademi Farmasi Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.53342/pharmasci.v3i1.69

Pada penelitian ini, dilakukan modifikasi abu bawah batubara menggunakan larutan basa kuat natrium hidroksida (NaOH) dengan konsentrasi 3M. Tujuan dari penelitian ini adalah untuk mengetahui perbedaan abu bawah batubara sebelum dan sesudah modifikasi menggunakan larutan NaOH 3M. Terdapat perbedaan morfologi antara abu bawah batubara sebelum dan sesudah modifikasi. Abu bawah batubara tanpa modifikasi dan dengan modifikasi juga dapat dimanfaatkan untuk menurunkan konsentrasi logam berat Cd dalam larutan. Abu bawah batubara tanpa modifikasi dapat menurunkan konsentrasi logam berat Cd dalam larutan sekitar 40%, sedangkan abu bawah termodifikasi dapat menurunkan konsentrasi logam berat Cd dalam larutan sekitar 70%.Kata kunci: Abu Bawah Batubara, Modifikasi, Adsorben

Pengaruh Perendaman Umbi dan Tepung Porang Dalam Sari Buah Belimbing Wuluh Terhadap Sifat Fisik dan Kadar Kalsium Oksalat Wardani, Ratih Kusuma; Handrianto, Prasetyo
Journal of Pharmacy and Science Vol. 4 No. 2 (2019): Journal of Pharmacy and Science
Publisher : Akademi Farmasi Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.53342/pharmasci.v4i2.148

ABSTRAKUmbi porang merupakan tanaman umbi-umbian yang banyak tumbuh di Indonesia khususnya di daerah Saradan Madiun Jawa Timur. Dalam pengolahan pascapanen, umbi porang diolah menjadi keripik dan tepung untuk memperpanjang waktu simpannya. Baik umbi maupun tepung porang masih mengandung kalsium oksalat dengan kadar yang cukup tinngi. Kalsium oksalat dapat menyebabkan rasa gatal pada lidah saat dikonsumsi. Penelitian ini bertujuan untuk mengetahui pengaruh perendaman umbi dan tepung porang dalam larutan sari buah belimbing wuluh. Tepung porang yang direndam dalam larutan sari buah belimbing wuluh mengalami gelatinasi. Konsentrasi larutan sari buah belimbing wuluh mempengaruhi kadar kalsium oksalat pada umbi dan tepung porang. Penurunan kadar kalsium oksalat paling besar pada umbi dan tepung porang terjadi setelah sampel direndam larutan sari buah belimbing wuluh 7% v/v.Kata kunci: porang, kalsium oksalat, belimbing wuluh.ABSTRACTPorang tubers are a plant that widely grown in Indonesia, especially in the Saradan Madiun East Java. After harvesting process, porang tubers are processed into chips and flour to increase storage time. Both tubers and porang flour still contain high levels of calcium oxalate. Calcium oxalate can cause itching on the tongue when consumed. This study aims to determine the effect of soaking tubers and porang flour in Averrhoa bilimbi juice solution. Porang flour soaked in the Averrhoa bilimbi juice solution undergo gelatination. The concentration of Averrhoa bilimbi juice solution affected the calcium oxalate level in porang tuber and flour. The biggest decrease in calcium oxalate levels in porang tubers and porang flour occurred after the samples were soaked in 7% v/vAverrhoa bilimbijuice solution.Keywords: porang, calcium oxalate, averrhoa bilimbi.

Adsorpsi Logam Kadmium dalam Limbah Cair Buatan Menggunakan Biosorben Kulit Pisang Mas (Musa acuminate colla) Arifiyana, Djamilah; Wardani, Ratih Kusuma
Rekayasa Vol 14, No 3: Desember 2021
Publisher : Universitas Trunojoyo Madura

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21107/rekayasa.v14i3.12391

Mas banana (Musa acuminata Colla) peel is a type of household waste as well as agricultural waste whose utilization still needs to be improved. In addition, among various types of heavy metals that are dangerous as contaminants in the environment, cadmium metal is a metal that is very dangerous to health even in very small amounts. Therefore, this study aims to not only utilize the waste of Mas banana peel (Musa acuminata Colla) as a biosorbent, but also to determine the optimum conditions needed to reduce cadmium metal which involves several test parameters, namely stirring time, pH and mass of biosorbent. Variations of stirring time used include 10, 20, 30, 35, and 45 minutes; variations in pH used include 1, 2, 3, 4, and 5, while variations in the mass of biosorbent used include 0.5; 1; 1.5; 2 and 2.5 grams. The results showed that the optimum conditions were obtained at a mixing time of 35 minutes, pH 5, and a mass of 2 grams of biosorbent with a reduction percentage value of 78.45%. This percentage indicates that Mas banana peel can be used as a natural adsorbent for cadmium metal. In addition, the results of the FT-IR analysis of the Mas banana peel biosorbent showed that Mas banana peel has a functional group that plays a role in the heavy metal adsorption process.

Pengaruh Lama Perendaman dan Suhu Larutan Jeruk Nipis Terhadap Kadar Kalsium Oksalat Pada Umbi Porang Wardani, Ratih Kusuma; Djamilah Arifiyana
Journal of Research and Technology Vol. 7 No. 1 (2021): JRT Volume 7 No 1 Jun 2021
Publisher : 2477 - 6165

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55732/jrt.v7i1.284

Degenerative disease is a disease caused by a decrease in the condition of the human body. Degenerative diseases can be prevented with a healthy lifestyle, one of them is consuming foods with high fiber. One of the high-fiber foods that are being developed at this time is the porang tuber. Glucomannan, which is mostly contained in porang tubers, is a polysaccharide that is easily soluble in water and high in fiber. Besides containing glucomannan, porang tubers also contain lots of calcium oxalate which can cause irritation to the tongue and mouth when consuming it. Calcium oxalate levels can be lowered through immersion in acidic solution. Solution that can be used to reduce calcium oxalate levels in porang tubers is lime. Soaking time is one of the factors that affect the reduction of calcium oxalate levels. Porang tubers that have been immersed in 5% lime solution for 60 minutes showed the highest decrease, namely 31.79%. In addition, soaking at high temperatures can decrease calcium oxalate levels in porang tubers also. Porang tubers that have been immersed in a 5% lime solution at 60 ° C, the calcium oxalate level has decreased to 49.58%.

Analisis Semikuantitatif Parasetamol Dalam Jamu Pegal Linu Menggunakan Pemrosesan Gambar Digital dari Hasil Kromatografi Lapis Tipis Fernanda, M.A. Hanny Ferry; Wardani, Ratih Kusuma
Pharmaceutical Journal of Indonesia Vol. 8 No. 1 (2022)
Publisher : Brawijaya University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/ub.pji.2022.008.01.7

Jamu is a pharmaceutical preparation derived from plant simplicia and must meet quality requirements, one of which is that it must not contain medicinal chemicals (BKO). One of the herbs widely circulated and can be obtained freely in the community is herbal medicine for aches and pains. In herbal aches and pains, paracetamol is the BKO suspected to be used in this preparation. This study aimed to develop an analytical method to determine the content of paracetamol BKO in herbal pain relief semi-quantitatively using digital images obtained from Thin Layer Chromatography. The semi-quantitative analysis method is carried out by processing digital images using the qTLC application. The results of this study proved the presence of paracetamol BKO in herbal aches and pains qualitatively using the TLC method. Of the five samples analyzed, only one contained paracetamol BKO with an Rf value of 0.15, while the standard Rf was 0.14. The analysis was then continued with the determination of paracetamol levels semi-quantitatively using digital image processing from the Thin Layer Chromatography results. Based on the results of semi-quantitative analysis, it can be seen that the sample suspected to contain paracetamol contains paracetamol with a concentration of 1,491.31 ppm. The results of this study can provide accurate detection of paracetamol BKO compound determination and semi-quantification limits and have the potential for more quantitative analysis in herbal medicine.

Analisis Semikuantitatif Parasetamol Dalam Jamu Pegal Linu Menggunakan Pemrosesan Gambar Digital dari Hasil Kromatografi Lapis Tipis Fernanda, M.A. Hanny Ferry; Wardani, Ratih Kusuma
Pharmaceutical Journal of Indonesia Vol. 8 No. 1 (2022)
Publisher : Brawijaya University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/ub.pji.2022.008.01.7

Jamu is a pharmaceutical preparation derived from plant simplicia and must meet quality requirements, one of which is that it must not contain medicinal chemicals (BKO). One of the herbs widely circulated and can be obtained freely in the community is herbal medicine for aches and pains. In herbal aches and pains, paracetamol is the BKO suspected to be used in this preparation. This study aimed to develop an analytical method to determine the content of paracetamol BKO in herbal pain relief semi-quantitatively using digital images obtained from Thin Layer Chromatography. The semi-quantitative analysis method is carried out by processing digital images using the qTLC application. The results of this study proved the presence of paracetamol BKO in herbal aches and pains qualitatively using the TLC method. Of the five samples analyzed, only one contained paracetamol BKO with an Rf value of 0.15, while the standard Rf was 0.14. The analysis was then continued with the determination of paracetamol levels semi-quantitatively using digital image processing from the Thin Layer Chromatography results. Based on the results of semi-quantitative analysis, it can be seen that the sample suspected to contain paracetamol contains paracetamol with a concentration of 1,491.31 ppm. The results of this study can provide accurate detection of paracetamol BKO compound determination and semi-quantification limits and have the potential for more quantitative analysis in herbal medicine.

The Role of Academic Supervision and Communication on Teacher Performance Wardani, Ratih Kusuma; Rahmawati, Desi; Santosa, Heru
Journal of Education Reseach and Evaluation Vol 5 No 2 (2021): May
Publisher : LPPM Undiksha

Teachers as education personnel have an important role in determining success in achieving educational goals. Schools pay special attention to teacher competence so that teachers are required to continue to develop professionalism and performance. This study aims to obtain information about the role of academic supervision and interpersonal communication. research place at public elementary schools in the administrative city of South Jakarta. This study used a survey method with path analysis techniques and a causal quantitative approach. The sample in this study was 81 teachers who were taken using simple random sampling technique or simple random sampling and the teachers who were the object of the research were determined using the sample technique formula from Slovin. The data analysis technique was performed using descriptive and inferential statistics by first doing the prerequisite analysis, namely population normality and regression analysis. The findings from the study that academic supervision activities and smooth interpersonal communication play a major role in improving teacher performance. Professional teachers will be able to manage learning activities well and will be able to provide motivation to students so that the goals of learning will be achieved and produce students who excel in their respective fields.

Title

Found 12 Documents
Search

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Title Search

Found 12 Documents Search

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Title

Found 12 Documents
Search