Garuda - Garba Rujukan Digital

p-Index From 2021 - 2026

1.817

P-Index

This Author published in this journals

All Journal Jurnal Keperawatan International Journal of Biosciences and Biotechnology Jurnal Ilmu Dasar BERKALA SAINSTEK EduChemia: Jurnal Kimia dan Pendidikan UNEJ e-Proceeding Jurnal Kimia Riset Jurnal Biodjati Jurnal Ilmiah Universitas Batanghari Jambi NurseLine Journal Indonesian Journal of Chemistry JKPK (Jurnal Kimia dan Pendidikan Kimia) The Indonesian Journal of Health Science Abdimasku : Jurnal Pengabdian Masyarakat Bima Nursing Journal Indonesian Chimica Letters

Siswoyo Siswoyo

Chemistry Department, Faculty Of Mathematic And Natural Sciences, Universitas Jember, Jl. Kalimantan 37, Jember, East Java, 68121

Author-ID : 3121728

Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Earth & Planetary Sciences Economics, Econometrics & Finance Education Environmental Science Health Professions Industrial & Manufacturing Engineering Law, Crime, Criminology & Criminal Justice Materials Science & Nanotechnology Mathematics Medicine & Pharmacology Neuroscience Nursing Physics Public Health Social Sciences

Published : 20 Documents Claim Missing Document

Claim Missing Document

Articles

1 2

The Relation between Fatigue and Self-management in Patient with Diabetes Melitus Type 2 in Dr Soebandi Hospital Jember Syahrul Abdul Yazid; Jon Hafan Sutawardana; Siswoyo Siswoyo
Jurnal Keperawatan Vol. 11 No. 1 (2020): Januari
Publisher : University of Muhammadiyah Malang

Introduction: Fatigue that felt by diabetes melitus patient will be a barrier when doing self-management. An ineffectiveness of self-management will affect many complications, either macrovascular and microvascular. Objective: The goal of this research is determine the relation of fatigue and self-management of diabetes melitus type 2. Method: The design of this research is using observative correlative with cross – sectional way. There are 102 research samples obtained from the calculation G*Power. The methode of taking the data doing with way to gather use with Multidemensional Fatigue Inventory (MFI20) questionnaire and Diabetes Self-Management (DSMQ) that has tested validity and realibility for analyze the fatigue and self-management. The data from analyzed using spearman rank (α = 0,05). Results: Research’s result average of respondent showed that general fatigue (15,66), physical fatigue (13,8), reduced activity (12,44), reduced motivation (11,01), mental fatigue (11,37). Patient self-management showed if from 102 respondent in majority has good self-management 86 (84.3%) dan 15 (14,7%) the rest of respondent has enough – good. The second analyzed test showed that no relation that significant between fatigue and self-management. Discussion: There are other factor can influence self-management such as, social support and family support. Analyzed test showed if have corelation between reduce activity with managemen glukosa

SUGAR PRODUCTION BY DIGESTING OF OIL PALM EMPTY FRUIT BUNCH USING EXTRACELLULAR ENZYMES FROM Aspergillus niger AND Trichoderma reesei FOR ETHANOL PRODUCTION Kahar Muzakhar; Sutoyo S; Siswoyo S
International Journal of Biosciences and Biotechnology Vol 2 No 1 (2014)
Publisher : Central Laboratory for Genetic Resource and Molecular Biology, Faculty of Agriculture, Udayana University in cooperation with Asia-Oceania Bioscience and Biotechnology Consortium (AOBBC)

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (341.426 KB)

Extracellular enzymes which obtained from 4 days cultivation Aspergillus niger and Trichoderma reesei onsolid state fermentation of oil palm empty fruit bunch (OPEFB) were used for lignocellulosic-??rich OPEFBdigestion. The enzymes were concentrated using 70% saturated ammonium sulphate, dialysed against20mM acetate buffer at pH 5 and adjusted one tenth (v/v) from the initial volume with the same buffer.The concentrated enzymes were then used in hydrolysation of powdered OPEFB. Amount of 10.65 mg/ mland 11.47 mg/ml sugars were produced when each concetrated enzyme A. niger and T. reesei mixedwith2%OPEFB. These hydrolysation were done on 100 ml total volume, incubated at 37oC with 100 rpmshaken for 36 hours. Further, both hydrolyzates results were sterilised and fermented anaerobically usingSaccharomycess cerevisiae at concentration 0.5mg/ml cells and incubated in 30oC for 24 hours. Colorimetricanalysis using QuantiChrom Kit DIET-??500 at OD 580nm gave results the alcohol production were 0.86%and 0.92% which were similar with Gas Chromatograph analysis that of 0.83% and 0.93%, respectively.

Optimisation of Extractant and Extraction Time on Portable Extractor Potentiometric Method for Determining Phosphate in Soil Anggia Rose Sukaton; Siswoyo Siswoyo; Bambang Piluharto
UNEJ e-Proceeding 2016: Proceeding The 1st International Basic Science Conference
Publisher : UPT Penerbitan Universitas Jember

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

Phosphorus is one of the nutrients which is needed by plants in large amounts. Fertilisation is a popular solution for supplying a sufficient amount of phosphorus in the soil. However, phosphorus can pollute water bodies and lead to eutrophication if fertilisation is carried out without considering prior information about the soil condition. Thus, analysis of phosphorus needs to be done before fertilisation. This paper is reporting a result in development an alternative strategy for analysing the phopsphorus in soil agriculture using potentiometric method. The aims of this research were to find the optimum condition of extractant and extraction time for determining phosphate, one form of phosphorus, in soil and evaluate a portable extractor potentiometric (PEP) method for determining phosphate in soil. Measurement of phosphate was undertaken by using cobalt working electrode, silver-silver chloride reference electrode and 0,025 M potassium hydrogen phtalate at pH 4 as ionic strength adjuster. Evaluation of PEP method was carried out by comparing this method with both the conventional potentiometric (CP) and the standard spectrometric (SS) methods. It was found that Kelowna was the optimum extractant for measuring phosphate potentiometrically in soil by CP method. Extraction time of 10 minutes was the optimum time for extracting phosphate in soil using Kelowna extractand solution. The result also shown that correlation between PEP and CP method was 0.883 whereas correlation between PEP and SS method was 0.924. Linear response characterisation of both PEP and CP method has obtained slope of (-28.47) and (-23.67) mV per decade respectively, in other hand the PEP and CP has resulted the detection limit 0.72 ppm and 0.83 ppm respectively. Repeatability for both PEP and CP method were less than 5%.

High Performance Liquid Chromatography of Amino Acids Using Potentiometric Detector With A Tungsten Oxide Electrode Yeni Maulidah Muflihah; Zulfikar Zulfikar; Siswoyo Siswoyo; Asnawati Asnawati; Qurrota Ayun
UNEJ e-Proceeding 2016: Proceeding The 1st International Basic Science Conference
Publisher : UPT Penerbitan Universitas Jember

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

High Performance Liquid Chromatography (HPLC) method combine with potentiometric detector was applied as a method for analysis of amino acids (aspartic acid, glutamic acid and arginine). The separation was carried out on a C18 column with isocratic elution of a mixture of acetonitrile and phosphat buffer. Potentiometric detector using a tungsten oxide electrode as working electrode and Ag/AgCl as refference electrode. The detection method was based on the presence of H+ ions from amino acids. This application was a development of previous studies that was succesfully applied to detect the presence of amino acids in batch and flow systems. Amino acid determination was characterized by its retention time. Retention time of aspartic acid, glutamic acid and arginine were as follow: 8,46; 13,0; and 15,21 minutes. The optimized separation conditions obtained at a flow rate of 1,2 mL/min with 15% acetonitrile concentration, buffer pH 6,5 with phosphat concentration of 5x10-4 M. Detector performance tested by the recovery test of samples, and the results obtained for glutamic acid, aspartic acid and arginine respectively: 89,1%, 94,9%, and 110%. Linear range obtained at 10-3 M to 10-7 M. Detection limit were 1,58x10-7 M for glutamic acid, 6,58x10-8 M for aspartic acid and 6,51x10-8 M for arginine.

OPTIMASI PARAMETER TEKNIK SQUARE WAVE VOLTAMMETRY DENGAN ELEKTRODA GRAFIT FAN PENERAPANNYA PADA ANALISIS KLORIN BEBAS DALAM AIR CUCIAN BERAS BERPEMUTIH Fenly Arismaya; Siswoyo Siswoyo; Asnawati Asnawati
Jurnal Kimia Riset Vol. 3 No. 2 (2018): Desember
Publisher : Universitas Airlangga

AbstrakKlorin (OCl-) merupakan bahan kimia berbahaya bagi kesehatan manusia, yang kadang digunakan sebagai bahanpemutih beras. Oleh sebab itu dilakukan upaya analisis Klorin menggunakan teknik Square Wave Voltammetry. Penelitian ini melakukan optimasi pengaturan parameter (konsentrasi larutan elektrolit, pH, dan sampling time) dan karakterisasi metode kerja dari teknik Square Wave Voltammetry, sehingga teknik ini dapat diaplikasikan untuk analisis klorin bebas (OCl-) dalam air cucian beras berpemutih. Variasi konsentrasi larutan elektrolit yang diterapkan dalam penelitian ini adalah 0,05; 0,10; 0,15; 0,20; 0,25 M. Variasi pH yang diterapkan pada pH 7, 8, 9, 10, 11, dan 12. Variasi sampling time yang diterapkan adalah 5, 10, 15, dan 20 milisekon. Berdasarkan hasil penelitian yang diperoleh, konsentrasi larutan elektrolit optimum pada konsentrasi 0,15 M, pH optimum pada kondisi pH 9, dan sampling time optimum adalah 10 milisekon. Hasil karakterisasi kinerja metode pada teknik Square Wave Voltammetry yang telah dioptimasi ini menghasilkan linieritas 0,9885, limit deteksi sebesar 9,563 ppm, dan nilai koefisien variasi sebesar 4,09%. Hasil pengukuran konsentrasi klorin bebas (OCl-) dengan teknik Square Wave Voltammetry yang telah dioptimasi adalah senilai 30,125 ppm. Pengaturan tiga parameter tersebut berpengaruh terhadap bentuk dan ketinggian puncak voltamogram yang dihasilkan. Kata Kunci: Square Wave Voltammetry, Optimasi Parameter, Klorin bebas, Beras Berpemutih.

Voltammetric Synthesis of Conducting Polymer Polypyrrole and Its Response Characteristic to Alcohol Susi Nurqomariyah; Asnawati Asnawati; Neran Neran; Siswoyo Siswoyo
Jurnal ILMU DASAR Vol 16 No 2 (2015)
Publisher : Fakultas Matematika dan Ilmu Pengetahuan Alam Universitas Jember

Conducting polymer is a used material for many purposes, including active compound of chemical sensor. Polypyrrole, one type of conducting polymers, is frequently used because of its advantages, namely owing high conductivity, strong mechanical properties and relatively stable compound. This research was aimed to develop an alcohol sensor based on polypyrrole. Electropolymerisation of the polypyrrole was carried out using cyclic voltammetric technique. This research investigated some parameters electropolymerisation, namely variation of dopant electrolyte concentration, potential scan-rate, surface morphology of the polymer resulted, characteristic of the sensor performance when exposed to some alcohol compounds. According to the result of investigation, it was found that variation of potential scan-rate and dopant concentration has significant effect to the electropolymerisation process as well as to the resulted polymer, as indicated by the voltammogram profiles, the surface morphology of the resulted polymer and the response of resistance change of the polymer when exposed to the alcohol compounds.Keywords: polypyrrole, conducting polymer, alcohol sensor, cyclic voltammetry, electropolymerisation.

FLOW INJECTION POTENTIOMETRIC ANALYSIS OF ASPARTIC ACID, GLUTAMIC ACID AND ASCORBIC ACID USING PLATINUM ELECTRODES Yeni Maulidah Muflihah; Siswoyo Siswoyo; Tanti Haryati; Kiki Puji Setianingrum
Jurnal ILMU DASAR Vol 13 No 1 (2012)
Publisher : Fakultas Matematika dan Ilmu Pengetahuan Alam Universitas Jember

The presence of weak acids in solution can be detected using a potentiometric detector. Platinum was used as a working electrode and Ag/AgCl as a reference electrode. Ascorbic, glutamic and aspartic acid were detected by a platinum electrode in a flow potentiometric system. The influence of pH, flow rate and concentration of phosphate buffers asa a carrier were studied and showed an optimum pH for the detection of ascorbic and glutamic acid at pH 6,5 and pH 7,0 for aspartic acid. Phosphate buffer concentration optimum at 1x10-4M and flow rate of 1,00 mL/min. Linear range for ascorbic and glutamic acid at 2,5 x10-4M to 5x10-2M, with a regression coefficient of 0,974 and 0,958, while for aspartic acid 5x10-4M to 5x10-2M with a regression coefficient 0,911. Detection limit for ascorbic and glutamic acids were 5x10-4M and 1x10-3M for aspartic acid. Sensor reproducibility obtained from variation coefficient (Kv). Variation coeffiecient (Kv) of ascorbic acids 1,32-1,69%, glutamic acids 0,69- 1,57% and aspartic acid 0,54- 1,29%.

PSYCHOEDUCATION THERAPY REDUCES FAMILY ANXIETY IN TREATING FAMILY MEMBER WHO SUFFERS FROM CATARACT Siswoyo Siswoyo; Baskoro Setioputro; Cholil Albarizi
NurseLine Journal Vol 1 No 2 (2016): November 2016
Publisher : Faculty of Nursing, Universitas Jember

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

Anxiety will appear on the family in caring family member who suffers from cataract. Family psychoeducation therapy can help reduce anxiety, so that families can find a solution for family members who suffer from cataracts appropriately. The purpose of this study was to examine the effect of family psychoeducation therapy (FPE) on the anxiety level of family whose member suffers from cataract. This study was pre-experimental research with pretest-posttest design. The sampling technique was total sampling. There were 16 families of cataract patients living in the area of public health center of Jelbuk Jember participated in this research. Data collection was conducted in March 2016. FPE was given four times a week with a total of 12 times in 3 weeks and the duration was 60 minutes for each session. Zung Self-Rating Anxiety Scale (ZSAS) was applied to measure anxiety level. The result of data analysis using Kruskal Wallis test showed p value of 0.001 (α=0.05). There was a significant influence of family psychoeducation (FPE) therapy on the anxiety level of family whose member suffers from cataract. Psychoeducation therapy can increase knowledge and empowerment of families in caring for family members who suffer from cataracts. FPE consists of activities that can improve family adaptive functioning and skills of positive coping mechanisms. Psychoeducation therapy can be applied to families to lower the anxiety level from burden experienced in caring family members who suffer from cataracts.

ELECTROPOLYMERISATION AND CHARACTERISATION OF DOPED-POLYPYRROLE AS HUMIDITY SENSOR Siswoyo Siswoyo; Trio F. Nugroho; Zulfikar Zulfikar; Agus Subekti
Indonesian Journal of Chemistry Vol 6, No 2 (2006)
Publisher : Universitas Gadjah Mada

A new type of sensing materials for humidity measurement has been developed based on conducting polymer polypyrrole synthesised from pyrrole by adding some dopant compounds, bromide and chloride, it is prepared by potentiodynamic-electropolymerisation technique. Variation of dopant types and concentration has been carried out in order to investigate the effect of this variation to the change of polymeric conductivity when interacting with water vapour. Polypyrrole-Cl (Ppy-Cl) and polypyrrole-Br (Ppy-Br) exhibit a good principal characteristic as sensor candidate namely responding proportionally to humidly variation ranging 30% - 90% relative humidity. Characterisation test for the sensor candidates has been carried out for evaluating their linearity respond toward humidity, their stability in certain period and their reproducibility in some tests. The results show that Ppy-Cl and Ppy-Br showing good linearity respond with R value in a range of 0.95 - 0.99. Their reproducibility and sensitivity were relatively good, however their respond stability were only last in few days. The stability probably is related to the stability of resulted polymeric structure that very affected by synthesis process and dopant used. It is necessary to extend the use of other dopant materials and changing the synthesis process in order to improve sensor stability. In other hand it is also necessary to characterise other performance characteristic of the sensor namely response time, and interference effect of some volatile chemicals and other gases.

An Extracellular Pectinase from ISH16 Bacteria Isolated Induced by Coffee Pulp Waste Substrate Kahar Muzakhar; Farah Salma Elida; Ramdhan Putrasetya; Siswoyo Siswoyo; Rudju Winarsa; Hidayat Teguh Wiyono
Jurnal Biodjati Vol 7, No 2 (2022): November
Publisher : UIN Sunan Gunung Djati Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15575/biodjati.v7i2.20279

An α-1,4-glycosidic bonds galactoses pectin, mainly composed of a D-galacturonic acid chain, are important biomaterial widely used in industries. Utilizing this material, a bioprocess, including the biocatalysis pectinase, is often needed. Pectinase production was optimized in 7 days SSF at 37°C, and the pectinase activities were daily measured by the method of Somogy-Nelson. The optimum pectinase production was 0.166 U/ml on the fourth day SSF. Purification using open column ion exchange chromatography DEAE cellulose DE-52 resulted in 1030.9 folds of pectinase purity with a yield of 25.9%. The enzyme was at optimal activity at pH six and attended stable in the pH range of 5.5-8, while optimal activity at a temperature of 50°C and was stable in the range of 30-45°C. The pectinase activity increased by 120% with the addition of 10 mM Mg2+, and 95% retained when 10 mM Ca2+ was added. The presence of 10 mM Na+, K+, and Fe2+ resulted in a slight effect of activity at 85%, 83%, and 78%. However, it was strongly inhibited by 10 mM Al3+ and retained 25%. Based on the results above, the microbial utilization of coffee pulp waste by ISH16 bacteria pectinolytic is one opportunity to produce valuable pectinase with low-cost production, so comprehensive examination in large-scale production is needed too. In this paper, all research detail steps were described.

Co-Authors Agus Subekti Ahmad Fathoni Alvin Faizin Lisar Anggia Rose Sukaton Anida, Choirun Nisa Ardyanti, Zona Salsabila Asnawati Asnawati Asnawati Asnawati Atik Komaria Bambang Piluharto Baskoro Setioputro Cholil Albarizi Elly Nurus Sakinah, Elly Nurus Farah Salma Elida Farel Govind Alfayed Ariyanto Febiola Silvia Ningsih Fenly Arismaya Hafan Sutawardana, Jon Hidayat Teguh Wiyono Indradewa, Rhian Kahar Muzakhar Kiki Puji Setianingrum Kushariyadi Kushariyadi Kushariyadi Kushariyadi Maulidah Muflihah, Yeni Mintadi, Mukh. Muhammad Reza Mulyono, Tri Neran Neran Neran Neran Nistiandani, Ana Putri F. Rianasari Qurotul Ainiyah Qurrota Ayun Ramdhan Putrasetya Rondhianto Rondhianto Setyo Bagus Hariyanto Surya Primaswara, Alfisa Susi Nurqomariyah Sutoyo S Syahrul Abdul Yazid Tanti Haryati Tira Anjeli Rahmah Tri Mulyono Trio F. Nugroho Wantiyah Wantiyah Wijayanti, Chatarina Winarsa, Rudju Yeni Maulidah Muflihah Zein, Inayatul Aulia Rizka Zulfikar Zulfikar

Title

Found 20 Documents
Search

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Title Search

Found 20 Documents Search

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Title

Found 20 Documents
Search