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PEMBUATAN ELEKTRODA KARBON AKTIF BERBASIS CANGKANG BUAH MELINJO SEBAGAI MATERIAL UNTUK ELEKTRODA SEL SUPERKAPASITOR
(Elfitra, 2023-12) Putri, Hardini Chania
Biomass-based porous carbon electrodes have been widely used as a basic material
for making supercapacitor cell electrodes, because its application can be applied in
the long term, sustainable, renewable, easy to find and has economic value. This
research used biomass melinjo fruit shell (CBM) with variations in the addition of
melamine mass, namely 0, 0.1, 0.3, and 0.5 g as carbon electrodes for supercapacitor
cells. The process of synthesizing supercapacitor cell electrodes is through several
stages, a pre-carbonization at of 200°C, chemical activation using KOH,
carbonization with gas at a temperature of 600°C and physical activation with
gas at a temperature of 800°C. The highest density shrinkage value is owned by the
CBM-03 sample is 56.45%.
PEMBUATAN ELEKTRODA KARBON AKTIF BERBASIS BIOMASSA TANDAN KOSONG KELAPA SAWIT SEBAGAI MATERIAL UNTUK ELEKTRODA SEL SUPERKAPASITOR
(Elfitra, 2023-12) Gunawan, Firman
Porous carbon electrodes based on biomass derivatives have been widely used as the basis for
making supercapacitor cell electrodes, because their application can be applied in the long
term, sustainable, renewable, easily available, and economically valuable. This research uses
biomass derived from empty palm bunches (OPEFB) using ZnCl2 activator and heteroatom
doping as a supercapacitor cell carbon electrode. The synthesis process of supercapacitor cell
electrodes goes through several stages, namely the hydrothermal carbonization stage with a
temperature of 180°C, chemical activation using ZnCl2 chemical activation using ZnCl2 ,
nitrogen doping as much as 3 grams, carbonization with N2 gas at a temperature of 600°C and
physical activation with CO2 gas at a temperature of 800°C. The highest density shrinkage
value is owned by the TKKS-M sample which is 57.344%.
ELEKRODA KARBON AKTIF BERBAHAN DASAR KULIT UDANG WINDU (Paneous Monodon) UNTUK APLIKASI SUPERKAPASITOR
(Elfitra, 2023-12) Yolanda, Fingky
Supercapacitors are potential energy storage devices that are inexpensive to maintain and
environmentally friendly. Electrode materials with varying carbonization temperatures
were prepared using tiger prawn shell biomass (KUW). The manufacture of carbon
electrodes is carried out using several processes, namely the precarbonization process,
activation with a KOH activator, carbonization process, and physical activation using
CO2 gas. As a precursor through the activation process of KOH and CO2. The pore
structure can be adjusted by varying the CO2 activation temperature at 600℃, 700℃, and
700℃ with the respective sample codes, namely KUW-600, KUW-700 and KUW-800.
The resulting electrode has a unique and efficient structure and pore regulation and has
great potential for supercapacitor applications. The highest density loss value possessed
by the KUW-700 sample was 19.16%.
IDENTIFIKASI PENGARUH APLIKASI SUPERNATAN BEBAS SEL Lactococcus lactis ATCC 11454 TERHADAP PERUBAHAN NILAI pH FILLET AYAM BROILER
(Elfitra, 2023-12) Khoirunisa, Eliza; Haryani, Yuli
Broiler chicken is a commonly consumed food item in daily life, but it has a short shelf
life due to the presence of highly nutritious components that facilitate bacterial growth.
Lactococcus lactis ATCC11454 is a specific strain of lactic acid bacteria (BAL)
frequently utilized in the food industry for its efficient production of nisin, a peptide
known for its biopreservative properties in food products. The objective of this research
is to evaluate the application of Cell-Free Supernatant (CFS) from Lactococcus lactis
ATCC11454 on broiler chicken fillets concerning changes in pH values. Chicken fillets
were coated with and without CFS from L. lactis ATCC11454, and then stored at two
different temperatures. The percentage increase in pH values of fillets without CFS
coating was higher compared to fillets with CFS coating.
POTENSI LIMBAH BIOMASSA DAUN PALA SEBAGAI BAHAN DASAR PEMBUATAN KARBON AKTIF BERPORI
(Elfitra, 2023-12) Andriani, Dini; Taer, Erman
Porous carbon based on nutmeg leaf biomass waste was chosen as the basic material
for making activated carbon. Porous carbon was synthesized using KOH chemical
activator with varying concentrations of 0,3 M, 0,5 M, and 0,7 M to obtain optimal
conditions of activated carbon. The preparation of carbon electrode samples starts from
the drying stage, pre-carbonization, smoothing with mortar and ball milling, sieving
using a 60 μm sieve, KOH chemical activation, carbon pellet printing, carbonization
and physical activation to the optimum temperature of 850°C in an N2 and CO2 gas
environment. The effect of varying the concentration of KOH activator was tested and
the physical properties were compared. The results of the characterization of the
physical properties of the nutmeg leaf activated carbon electrode were obtained through
the calculation of the percentage of density shrinkage. Variations in the concentration
of KOH activator can reduce the percentage of density of carbon pellets DP 0,3, DP
0,5, and DP 0,7 by 35,80%, 42,04%, and 42,68% respectively. Based on the
characterization results, the effect of adding KOH chemical activating agent on all DP
samples can increase the evaporation of impurities other than carbon which is indicated
by the increase in shrinkage value.