Articles: Recent submissions

Now showing items 2601-2620 of 4336

    • Negative Binomial Regression Analysis on Dengue Hemorrhagic Fever Cases in East Kalimantan Province 

      Fathurahman, M. (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 

      Fathurahman, M. (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 

      Fathurahman, M. (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 ...

    • Jurnal Nasional Sinta 3 

      pagoray, henny (Aquacultura Indonesiana, 2020-12-30)
      This study examines the effective concentration of temu kunci extract (Bosenbergia pandurata) as an antibacterial inhibition zone against 3 Aerococcus sp. isolates. and 2 Streptococus sp. isolates. The method used is ...

    • Jurnal Nasional Sinta 4 

      pagoray, henny (Jurnal Pertanian Terpadu STIPER KUTIM, 2019-06-01)
      ABSTRACT Ponds were one of the habitats that were used as a place for brackish water cultivation in coastal areas. The cultivation activities carried out have problems. One of the problems faced by farmers in Bontang ...

    • Jurnal Internasional 

      pagoray, henny (AACL Bioflux, 2020-04-01)
      Abstract. Water quality is one of the factors that strongly affect the cultured fish. Aquaculture practices in coal mining void often face mass death of their cultured fish due to water quality deterioration. The use ...

    • Multiple Roles of Women Employees: Dilematis with Family and Work during COVID-19 Disorders 

      Unknown author (HONG KONG JOURNAL OF SOCIAL SCIENCES, 2021-08-30)
      The COVID-19 pandemic has brought significant changes in various aspects of life, including in the work system, where the government's policy in preventing COVID-19 is working from home (WFH). The new work culture faced by ...

    • Jurnal Nasional Sinta 4 

      pagoray, henny (Jurnal Pertanian Terpadu STIPER KUTIM, 2020-12-01)
      ABSTRACT Water quality, natural feed in the form of phytoplankton, and zooplankton were used as indicators of water fertility that affect the cultivation activity. The study aims to determine the quantity, quality of ...

    • UJI ANTIBAKTERI Ag/SBA-15 DARI ABU DAUN BAMBU PETUNG TERHADAP BAKTERI Escherichia coli 

      Nurdahniyati; Handayani, Nunung; Subagyono, RR Dirgarini; Kusuma, Eko (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 

      Subagyono, RR Dirgarini; Liang, Zhijian; Knowles, Gregory P.; Chaffee, Alan L. (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 

      Subagyono, RR Dirgarini; Marshall, Marc; Knowles, Gregory P.; Chaffee, Alan L. (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 

      Subagyono, RR Dirgarini; Marshall, Marc; Jackson, W. Roy; Chow, Meechin; Chaffee, Alan L. (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 

      Subagyono, RR Dirgarini; Marshall, Marc; Jackson, W. Roy; Chaffee, Alan L. (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 

      Subagyono, RR Dirgarini; Marshall, Marc; Fei, Yi; Jackson, W. Roy; Chaffee, Alan L. (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 

      Subagyono, RR Dirgarini; Marshall, Marc; Jackson, W. Roy; Chaffee, Alan L. (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 

      Subagyono, RR Dirgarini; Marshall, Marc; Jackson, W. Roy; Fei, Yi; Chaffee, Alan L. (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 

      Subagyono, RR Dirgarini; Qi, Ying; Jackson, W. Roy; Chaffee, Alan L. (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 

      Qi, Ying; Han, Will; Subagyono, RR Dirgarini; Fei, Yi; Marshall, Marc; Jackson, W. Roy; Patti, Antonio F.; Chaffee, Alan L. (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 

      Subagyono, RR Dirgarini; Marshall, Marc; Jackson, W. Roy; Auxilio, Anthony R.; Fei, Yi; Chaffee, Alan L. (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 

      Subagyono, RR Dirgarini; Qi, Ying; Chaffee, Alan L.; Amirta, Rudianto; Marshall, Marc (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 ...