A - Mathematics and Natural Sciences: Recent submissions
Now showing items 241-260 of 512
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Reproductive biology of silurid catfishes Ompok miostoma (Vaillant 1902) in Mahakam River East Kalimantan
(Masyarakat Iktiologi Indonesia, 2019-02-11) -
UJI FITOKIMIA DAN AKTIVITAS ANTIBAKTERI EKSTRAK ETANOL AKAR LOTUS (Nelumbo nucifera)
(USU Press, 2011-05-21) -
INDIKATOR ASAM BASA DARI EKSTRAK ETANOL PUCUK DAUN PUCUK MERAH (Syzygium oleana)
(JKPK (JURNAL KIMIA DAN PENDIDIKAN KIMIA), 2017-12)Praktikum indikator asam basa alami biasanya dilakukan dengan mengekstrak bahan alam dengan pelarut tertentu, menguji ekstrak dengan berbagai macam larutan asam, basa dan netral, mencatat perubahan warnanya, menyimpulkan ... -
Negative Binomial Regression Analysis on Dengue Hemorrhagic Fever Cases in East Kalimantan Province
(2021-10-12)Poisson regression is commonly used in modeling count data. An essential assumption of the Poisson regression model is that the mean of the response variable is equal to the variance, namely equidispersion. Many fields ... -
Association Analysis of the Number of Dengue Hemorrhagic Fever Cases in East Kalimantan with the Factors of Geographic, Demographic, and Health Using Spearman Rank Correlation
(PIU-IsDB Mulawarman University, 2021-10-06)Dengue Hemorrhagic Fever (DHF) is a mosquito-borne infection caused by the dengue virus, primarily found in the tropics and sub-tropics. The Indonesian country is a tropical climate. During the last three years (2017-2019), ... -
Pemilihan Model Regresi Bernoulli Terbaik
(Jurusan Matematika FMIPA Universitas Mulawarman, 2021-08-28)Regresi Bernoulli merupakan model regresi yang dapat menjelaskan hubungan antara variabel dependen kategorik dan satu atau lebih variabel independen. Penelitian ini bertujuan mengkaji pemilihan model regresi Bernoulli ... -
UJI ANTIBAKTERI Ag/SBA-15 DARI ABU DAUN BAMBU PETUNG TERHADAP BAKTERI Escherichia coli
(Universitas Mulawarman, 2021-05-30)Antibacterial tests of Ag/SBA-15 from petung bamboo leaf ash against Escherichia coli were carried out. Modification of SBA-15 with Ag was conducted using the wet impregnation method while the antibacterial test was carried ... -
Amine modified mesocellular siliceous foam (MCF) as a sorbent for CO2
(Elsevier, 2011-02-11)Adsorption is considered a promising method for carbon capture. CO2 adsorbents take a variety of forms – but one approach is to fill mesoporous substrates with a polymeric CO2 selective sorbent. SBA-15 and mesocellular ... -
CO2 adsorption by amine modified siliceous mesostructured cellular foam (MCF) in humidified gas
(Elsevier, 2013-11-27)A set of branched and linear polyethyleneimine (PEI) modified mesocellular siliceous foams (MCF) were evaluated as adsorbents for CO2 capture at modestly elevated temperatures under conditions that simulate the vacuum swing ... -
Reactions with CO/H2O of Two Marine Algae and Comparison with Reactions under H2 and N2
(American Chemical Society, 2014-04-21)The reactions of a strain of marine alga Chlorococcum sp. and of a polystrain containing a mixture of marine algae with CO/H2O have been studied. The yields and chemical composition of the products obtained from the reactions ... -
Pressurized thermal and hydrothermal decomposition of algae, wood chip residue, and grape marc: A comparative study
(Elsevier Ltd., 2014-08-22)Pressurized thermal decomposition of two marine algae, Pinus radiata chip residue and grape marc using high temperature, high pressure reactions has been studied. The yields and composition of the products obtained from ... -
Thermo-chemical reactions of algae, grape marc and wood chips using a semi-continuous/flow-through system
(Elsevier BV, 2015-06-16)Chlorococcum sp., grape marc, and Pinus radiata have been reacted in a semi-continuous (flow through) system at 425 C under a flow of N2 or H2 and results compared to those from batch autoclave experiments. This paper ... -
Improvement in liquid fuel product quality from reactions of grape marc with CO/H2O
(Elsevier BV, 2015-06-19)Reactions of grape marc with CO/H2O have been investigated over a range of temperatures (320–425 C) with and without added sodium carbonate (Na2CO3) or sodium aluminate (NaAlO2) with a view to optimising liquid fuel quality. ... -
Thermochemical Reactions of Blue Gum and Fossil Wood with CO/ H2O: Some Mechanistic Comments
(American Chemical Society, 2015-12-04)Our previous work suggested that liquid product yields from wood, unlike those from other biomass types, were not increased by CO/H2O reaction. Reactions of blue gum (BG) and fossil wood (FW) using high-temperature, ... -
Pyrolysis-GC/MS analysis of biomass and the bio-oils produced from CO/H2O reactions
(Elsevier, 2016-05-22)Py-GC/MS of microalgae (Chlorococcum sp.), grape marc and wood chips (Pinus radiata) and the bio-oils produced from CO/H2O reactions ofthese substrates has been studied. The Py-GC/MS technique provided a more complete ... -
Characterisation of the products of low temperature pyrolysis of Victorian brown coal in a semi-continuous/flow through system
(Elsevier BV, 2018-07-24)Two Victorian brown coal samples, a run-of-mine Loy Yang coal (LY) and a Loy Yang light lithotype (LL), were subjected to pyrolysis at 420–460 °C and 330–460 °C, respectively, under a continuous nitrogen flow. The process ... -
Upgrading Microalgal Biocrude Using NiMo/Al-SBA-15 as a Catalyst
(American Chemical Society, 2020-04-03)Biocrude from Chlorococcum sp. algae was hydrotreated in batch autoclaves in the presence and absence of Al-SBA-15 supports and NiMo/Al-SBA-15 catalysts with different Si/Al ratios and hence different acidities. Reaction ... -
Pyrolysis-Gc/Ms Analysis of Fast Growing Wood Macaranga Species
(Universitas Pendidikan Indonesia, 2021-02-04)Py-GC/MS analysis of six different species of fast growing Macaranga wood has been studied. Flash pyrolysis was conducted at different temperatures (250-850 oC) under a flow of helium followed by GC/MS analysis of the ... -
Pyrolysis of fast growing wood Macaranga gigantea: Product characterisation and kinetic study
(Elsevier BV, 2022-01-17)Fast-growing wood Macaranga gigantea has been pyrolyzed and its pyrolysis products have been characterized and their formation kinetics studied. Pyrolysis of M. gigantea wood was carried out by varying the temperature and ...