cometadata/datacite-titles-descriptions-related-identifiers huggingface dataset:
DOI: 10.14457/cu.the.2017.435
title: Microemulsion Formation of Vegetable Oils Using Mixed Extended Surfactant for Cleaning Applications

description: Some vegetable oils and animal fats can form semi-solid crystalline. The formation of semi-solid fats or waxy soils results in weak interactions between the oil and surfactant during the cleaning process. In this study, the anionic extended surfac-tant (C14-15, 8PO-SO4) systems were employed to form a middle phase microemul-sion with various vegetable oils (coconut, palm and soybean oil). The addition of nonionic extended surfactant (C16-18, 2PO-4EO-OH) in the mixed surfactant systems was also evaluated to observe the solubility enhancement of oil and water phase. The IFT value of formulated surfactant systems was measured to determine the optimum salinity. The Hydrophilic-Lipophilic Deviation (HLD) concept was conducted to es-timate the required Cc and K parameter for examination of the correlation with the experiment. It was found that the extended surfactant systems formed the middle phase microemulsion with coconut, palm and soybean oil at the optimum salinity of 7 wt%, 8 wt% and 9 wt% NaCl, respectively. For the mixed system with the nonionic surfactant, the middle phase microemulsion formed at lower optimum salin-ity than that of the single surfactant system. The negative Cc value that obtained from HLD equation indicated that the hydrophilic surfactant property. For hard sur-face cleaning, the oil removal efficiency of mixed surfactant system is higher than the single surfactant system alone. The results obtained in this study improve the bet-ter understanding of the surfactant selection for vegetable oil microemulsions as well as semi-solid fats in cleaning application.
DOI: 10.13145/bacdive134976.20191129.4.1
title: Escherichia coli

description: The range of data encompasses taxonomy, morphology, physiology, sampling and concomitant environmental conditions as well as molecular biology.
DOI: 10.14457/cu.the.2017.436
title: Catalytic activity study of NixSny intermetallics

description: Cinnamyl alcohol (COL), versatile chemical in fragrance, flavoring, and pharmaceutical industries, can be found in only small amounts in nature. Generally, COL can be synthesized via selective hydrogenation of cinnamaldehyde (CALD), natural oil, at aldehyde functional group under high pressure of hydrogen gas. In this work, NixSny intermetallics were used as catalysts in selective hydrogenation to obtain COL. These catalysts were synthesized via mechanical alloying, economic and environmental method, and characterized by X-ray diffraction (XRD). By using 43, 58, and 75% tin contents with nickel, Ni3Sn, Ni3Sn2, and Ni3Sn4 intermetallics were prepared, respectively. In addition, formic acid was used as a proton-hydride source to convert CALD to COL. The optimal time, temperature, type and amount of NixSny catalyst, and also rate of formic acid adding were studied. The result showed that the optimal conditions were 300 mg Ni3Sn4, 5 mmol CALD and 25 µl per 5 min of FA in 10 ml THF at 60 ˚C for 3 h reaction time to the maximum yield of COL. Under these conditions, COL was obtained at 1.8% yield with 36.7% conversion. However, other products (hydrocinnamyl alcohol, hydrocinnamaldehyde, cinnamic acid, and benzaldehyde) were also detected by gas chromatography-flame ionization detector (GC-FID).
DOI: 10.13145/bacdive134977.20191129.4.1
title: Escherichia coli

description: The range of data encompasses taxonomy, morphology, physiology, sampling and concomitant environmental conditions as well as molecular biology.
DOI: 10.13145/bacdive134978.20191129.4.1
title: Escherichia coli

description: The range of data encompasses taxonomy, morphology, physiology, sampling and concomitant environmental conditions as well as molecular biology.
DOI: 10.14457/cu.the.2017.437
title: Material Flow Analysis (MFA) Study for Sustainable Management of PVC Wastes in Thailand (Phase III)

description: Polyvinyl chloride (PVC) products are used for domestic consumption more than 400,000 tons annually and tend to be increasing in Thailand. After discarded, these products will become wastes which are being accumulated and could cause several environmental problems if they are disposed by inappropriate method. In previous studies, our group investigated the material flow of PVC in Thailand to handle the PVC waste problems. Material Flow Analysis (MFA) model was developed to estimate the quantity and route of PVC wastes in Thailand. Furthermore, the primary data were collected from recycle shops and landfill sites were used to estimate the amount of PVC wastes that are generated and recycled on yearly basis. Phase III study was carried out in order to further proceed the MFA model by using annual domestic production data from 1971 to 2016 as an input in the model along with an average service lifetime of each product, consumer behaviour and economic decisions and off-spec products for accuracy estimation. Moreover, sheet & film product were included in this investigation in order to expand range of PVC products, in which covers about 93% of total PVC products in Thailand. In addition, the existing primary data were revised along with the new data were from other recycle shops and converters to estimate the amount recycled PVC products in 2015 and 2016 together with recycling ratio of each PVC product in Thailand. Finally, potential improvements of PVC waste management and suitable data collection system are proposed in order to promote environmentally friendly schemes for PVC production and utilization.
DOI: 10.13145/bacdive134979.20191129.4.1
title: Pseudomonas putida

description: The range of data encompasses taxonomy, morphology, physiology, sampling and concomitant environmental conditions as well as molecular biology.
DOI: 10.14457/cu.the.2017.438
title: Study on Energy Storage Ability of ZnO/TiO2 for Photocatalytic Degradation of Isopropanol

description: The photocatalytic degradation of isopropanol under UV irradiation was studied by using p-n junction of ZnO/TiO2 photocatalysts prepared by sol-gel technique. Their energy storage ability was tested with their photocatalytic activity where there was no UV illumination. That was investigated by illumination the system with UV light for 2 h and off for 2 h until 8 h. The composition and surface structure of the catalyst were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), surface area analysis, and particle size analysis. The change in the isopropanol concentration was observed by using gas chromatography. The result showed that the degradation efficiency of the ZnO doped on TiO2 layer films was higher than the single-TiO2 thin film, about 74.0% and 48.0%, respectively. Moreover, acetone was found during the photocatalytic degradation process of isopropanol. The effects of isopropanol solution pH, ZnO loading, and ZnO calcination temperature were studied. ZnO calcined at 600ºC and 15 mol% at unadjusted pH was suitable for both photocatalytic activity and energy storage. The photocatalytic degradation rates of isopropanol for the first and second illumination were about 21.0% and 20.8%, respectively. With no illumination, the highest degradation of isopropanol was about 14.8%.
DOI: 10.13145/bacdive134980.20191129.4.1
title: Enterococcus casseliflavus

description: The range of data encompasses taxonomy, morphology, physiology, sampling and concomitant environmental conditions as well as molecular biology.
DOI: 10.13145/bacdive134981.20191129.4.1
title: Acinetobacter baumannii

description: The range of data encompasses taxonomy, morphology, physiology, sampling and concomitant environmental conditions as well as molecular biology.
DOI: 10.14457/cu.the.2017.439
title: Conversion of Palm Fatty Acid Distillate to Biojet Fuel over Ni/HY-PdiTiOz Core-shell Catalyst

description: Generally, jet fuel is obtained from the refining of petroleum feedstock in order to powering the aircrafts, hence the world is more confronting a problem with increasing air pollution emission. Therefore, biojet fuel is introduced as an alternative way to solve the problem. Biojet fuel can be derived from bio-based feedstock such as palm fatty acid distillate or PFAD. Which is converted via the deoxygenation reaction in order to remove oxygenated compounds, carboxylic and carbonyl groups in the fatty acid molecules then followed by hydrocracking and hydroisomerization reaction. The heterogeneous catalyst is used to convert PFAD into saturated paraffins in the range of jet fuels using the design of core-shell catalyst model to do both steps of deoxygenation and hydroprocessing reaction. In terms of catalyst supports, TiO2 is used as the support in deoxygenation process to produce long chain hydrocarbon. In addition, zeolite is considered as support for hydrocracking process because of its suitable structure and acidity properties. The active metals such as Pd and Ni are also used to develop the efficiency of jet fuel production. In this work, the conversion of PFAD to biojet fuel will be investigated in a continuous flow fixed-bed reactor. The Ni/HYcore-Pd/TiO2shell catalyst will be prepared. During the catalytic activity testing at 425 °C, pressure 30 bar, H2/feed molar ratio of 10, and LHSV of 1.5 h-1 exhibited highest selectivity 48% towards biojet fuel. The effect of increasing space velocity did not give higher selective biojet fuel production due to shorter residence time. The formation of hydrocarbons from fatty acid over core-shell catalyst occurs through an aldehyde and alcohol intermediates further transform to heavier hydrocarbon then subsequently hydrocracking/hydroisomerization to biojet fuel.
DOI: 10.13145/bacdive134982.20191129.4.1
title: Salmonella enterica

description: The range of data encompasses taxonomy, morphology, physiology, sampling and concomitant environmental conditions as well as molecular biology.
DOI: 10.14457/cu.the.2017.440
title: Catalytic Activity of Cu-CeO2ZrO2 for Biodiesel Production

description: CeO2-ZrO2 was synthesized by co-precipitation (CZ copre) and nanocasting (MSP CZ) methods for supporting 9%wt Cu catalyst loaded by deposition-precipitation (DP) method (CuCZ copre and Cu-MSP CZ, respectively). Both CuCZ copre and Cu-MSP CZ were used in esterification reaction for biodiesel production. Structure and specific surface area of the synthesized supports and catalysts were characterized by XRD and BET tecnhiques. It was found that the specific surface area of CZ copre was less than MSP CZ support. The XRD result of CuCZ copre exhibited the diffraction peak of CuO, indicating the agglomeration of Cu species on support while that of Cu-MSP CZ showed no diffraction peaks of any Cu species, indicating that Cu was well dispersed on the MSP CZ support. Both CuCZ copre and Cu-MSP CZ were treated with sulfuric acid to test their catalytic activity using oleic acid and methanol as starting materials by microwave heating. The optimal conditions obtained were following: 2.0 M sulfuric acid, 5 wt% catalyst, and 12:1 methanol:oleic acid molar ratio at 60 °C for 1h.
DOI: 10.13145/bacdive134983.20191129.4.1
title: Klebsiella oxytoca

description: The range of data encompasses taxonomy, morphology, physiology, sampling and concomitant environmental conditions as well as molecular biology.
DOI: 10.14457/cu.the.2017.441
title: Adsorptive Bubble Separation for Oil Removal

description: This present work emphasized on the current knowledge regarding (i) feasibility of multi–stage forth flotation operation for oil removal, and (ii) comprehension of dynamic surface tensions of surfactant solutions in relation to foam characteristics. A multi–stage forth flotation efficiency depends on the enhancement of interfacial adsorption and the number of bubble caps and tray. The operational parameters including foam height, air flow rate and feed flow rate were controlled to obtain the optimum process performance. Under the optimum conditions—a number of trays of 4, a foam height of 60 cm, an air flow rate of 40 L/min, a feed flow rate of 60 mL/min, a surfactant concentration of 0.3% (w/v), and an NaCl concentration of 1.5% (w/v)—the enrichment ratio and the removal of motor oil could reach as high as 16.3 and 97.9%, respectively. Furthermore, the effects of surfactant structure on the equilibrium and dynamic surface tension were investigated and discussed to correlate with foam properties. For all studied surfactant solutions, the equilibrium experimental data were well fitted with the Langmuir adsorption isotherm, while the dynamic surface tension data were used to calculate diffusivity values of all studied surfactants by using Word-Tordai equation. It was found that a surfactant having longer alkyl group has a lower diffusivity value, whereas a surfactant having larger head group size has a higher diffusivity. The adsorption process of surfactant onto the air/water interface of generated bubbles was controlled by the diffusion.
DOI: 10.13145/bacdive134984.20191129.4.1
title: Escherichia coli

description: The range of data encompasses taxonomy, morphology, physiology, sampling and concomitant environmental conditions as well as molecular biology.
DOI: 10.13145/bacdive134985.20191129.4.1
title: Moraxella osloensis

description: The range of data encompasses taxonomy, morphology, physiology, sampling and concomitant environmental conditions as well as molecular biology.
DOI: 10.14457/cu.the.2017.442
title: Microbial conversion of cellulose to sugars by bacterial enzyme

description: This work studied the conversion of lignocellulosic materials to sugars, the intermediates for bioethanol production, by a bacterial enzyme. Due to the complex structure of lignocellulose, a cellulase enzyme cannot effectively access and hydrolyse cellulose fibers. Various pretreatment processes of lignocellulose have been studied to enhance enzymatic hydrolysis to date. In this work, corncob was firstly studied for microbial pretreatment using three microorganisms including two bacterial strains of Bacillus subtilis A 002 and Cellulomonas sp. TISTR 784 and a fungal strain of Phanerochaete sordida SK7. The results showed that the microbial pretreatment with P. sordida SK7 was the most effective for enhancing enzymatic hydrolysis with approximately 40% improvement, compared to no treatment. Whereas, Bacillus subtilis A 002 was able to hydrolyse some cellulose fraction in lignocellulose but the reducing sugar concentration was very low due to its simultaneously consumption. In the following part, the native cellulase-producing bacteria B. subtilis was developed to produce enzyme at high level using PCR-based cloning technique. Endoglucanse gene encoding from B. subtilis M015 was cloned into plasmid (pFLAG-CTS) and transferred into E. coli JE5505. The clone, named E. coli Glu5, could greatly produce endoglucanase with higher enzymatic activity than that of the native strain, approximately 17 times. Finally, E. coli Glu5 was used for a microbial hydrolysis of soluble cellulose (carboxymethyl cellulose) in a continuous bubble reactor. The results demonstrate the feasibility to consolidate the steps of enzyme production and enzymatic hydrolysis together in continuous system at a low organic loading rate of 5 kg/m3d.
DOI: 10.13145/bacdive134986.20191129.4.1
title: Corynebacterium striatum

description: The range of data encompasses taxonomy, morphology, physiology, sampling and concomitant environmental conditions as well as molecular biology.
DOI: 10.13145/bacdive134987.20191129.4.1
title: Pasteurella bettyae

description: The range of data encompasses taxonomy, morphology, physiology, sampling and concomitant environmental conditions as well as molecular biology.
DOI: 10.14457/cu.the.2017.443
title: Vegetable Oil Based Microemulsion Biofuels

description: The growth of energy demand increases dramatically which has resulted in an increase of exhaust emissions to air quality deterioration. Therefore, there are driving forces in the development of renewable energy production technologies. Vegetable oils based reverse micelle microemulsions have been increased in attention for biofuel production. This work aims to formulate microemulsion biofuel containing palm oil/diesel blend as nonpolar phase, and ethanol/butanol, as a polar phase. The nonionic alcohol ethoxylate surfactant with the different numbers of EO groups, EOn (n=1, 3, 5, and 9) were selected as a stabilizing agent. A pseudo-ternary phase diagram was conducted to determine an isotropic region in the phase behavior of microemulsion systems. The ability of butanol added for reducing the phase separation and amount of surfactant required to form the microemulsified fuels was explored. Together with, the effects of surfactant structures and cosurfactant structures, straight chain (1-octanol) and branch chain alcohol (2-ethyl-1-hexanol) were investigated systematically through their phase behaviors. The fuel properties (i.e., kinematic viscosity, droplet size, density, heating value) were examined and compared with neat biofuels. The results suggest that the percentage of surfactant used to stabilize the microemulsion decreased with increasing butanol fraction in the mixture of butanol/ethanol blend. The microemulsion with branching structure in cosurfactant required more surfactant to formulate the microemulsions. The addition of butanol to palm oil/diesel blended with ethanol affecting fuel properties was noted.
DOI: 10.13145/bacdive134988.20191129.4.1
title: Staphylococcus hominis

description: The range of data encompasses taxonomy, morphology, physiology, sampling and concomitant environmental conditions as well as molecular biology.
DOI: 10.14457/cu.the.2017.444
title: Investigation of asphaltene aggregation kinetics in the presence of water-in-oil emulsion

description: Asphaltene is a component of the petroleum liquid defined operationally. It represents the most refractory (or the heaviest fraction). It is well-known that changes in temperature, pressure, or composition can destabilize asphaltenes and cause aggregation and deposition in porous formations, production lines, and processing facilities (Sheu and Mullins 1995). This leads to the study of the behavior of asphaltene aggregation and parameters that could affect the rate of aggregation which, in this case, is water-in-oil emulsion. In addition, the asphaltene aggregation model derived by Haji-Akbari (2013) is applied as a framework in this study which explains the correlation between the time when asphaltene starts aggregating and the important parameters such as viscosity, collision efficiency and initial concentration of asphaltene nanoparticles. The experimental procedure developed by Tabish (2009) is also utilized as a standard procedure for every detection time experiment (the addition of heptane in oil and the aging method) and able to plot the aging time as a function of heptane concentration. As a consequence, the graph shows the rate of asphaltene aggregation comparing between the oil and water in oil. From this graph, it is shown that there are 2 controversial trends regrading 2 different water concentrations in oil. At lower water concentration (1wt% water), the rate of asphaltene aggregation becomes faster but, on the other hand, the rate is slowed down with higher water content (10wt% water). With these results, it can be concluded that water has effect on the rate of asphaltene aggregation.
DOI: 10.13145/bacdive134989.20191129.4.1
title: Burkholderia cepacia

description: The range of data encompasses taxonomy, morphology, physiology, sampling and concomitant environmental conditions as well as molecular biology.
DOI: 10.13145/bacdive134990.20191129.4.1
title: Agrobacterium radiobacter

description: The range of data encompasses taxonomy, morphology, physiology, sampling and concomitant environmental conditions as well as molecular biology.
DOI: 10.14457/cu.the.2017.445
title: Development of water-based adhesives for oriented Polypropylene (OPP) lamination

description: Eco-friendly laminating adhesive has been developed for flexible packaging industries due to urgent restriction of volatile organic compounds (VOCs) emissions from anthropogenic sources. The water-based polyurethane laminating adhesive was derived by a condensation polymerization of isophorone diisocyanate, polypropylene glycol and 2,2-bis(hydroxymethyl)propionic acid, while the water-based polyacrylate laminating adhesive was synthesized by an emulsion polymerization of 2-ethylhexyl acrylate, ethylene glycol methyl ether acrylate, styrene, 2-hydroxyethyl methacrylate and acrylic acid. The parameters influencing the adhesive’s performance consisted of chemical composition, reinforcing fillers and manufacturing processes. Among those parameters, the fabrication of waterborne core-shell polyacrylate laminating adhesive through a two-stage seeded semi-batch emulsion polymerization was desirable with a rigid core having a glass transition temperature (Tg) of -14.9 °C encapsulated by a soft shell having Tg ranging from -18.4 °C to -32.0 °C, depending on variables. The optimal formulation was accomplished using a core-to-shell ratio of 0.5 and 10 wt% of ethylene glycol methyl ether acrylate concentration in its shell, giving a bonded joint 180° peel strength 214.5 N/m with high cohesive strength and good adhesion to various substrates. This water-based laminating adhesive system has the possibility of replacing solventborne technology.
DOI: 10.13145/bacdive134991.20191129.4.1
title: Arcanobacterium haemolyticum

description: The range of data encompasses taxonomy, morphology, physiology, sampling and concomitant environmental conditions as well as molecular biology.
DOI: 10.14457/cu.the.2017.446
title: Analysis of biomarkers in crude oils, processed oils, and spilled oils

description: Oil spills in marine are commonly come from crude oils, fuel oils and lubricating oils by accidental leakages or purposeful discharges to the surroundings. As crude oil and fuel oil which refined from the heavy fraction of crude oil have similar physical properties especially if they were weathering, it is difficult to differentiate that the spill has the origin from crude oil or fuel oil. In this study, five crude oils, two fuel oils, one fresh and one used lube oil that are typically used in Thailand were investigated. All crude oils, fuel oils, and used lube oil were weathered in the sea water. All samples were characterized using GC-FID and GCxGC TOFMS. The attention of this work is focused on the distribution pattern of polycyclic aromatic hydrocarbons (PAHs) such as phenanthrenes (P), anthracenes (A), dibenzothiophenes (D) and their alkylation, and biomarkers in hopanes group. The statistic method was applied to distinguish crude oils, fuel oils and lube oil. The results from GC-FID showed a useful basis information of hydrocarbon in oils which could distinguish lube oil from other oil type due to the huge unresolved complex mixture (UCM). The distribution patterns of methyl-phenanthrenes (MP) and methyl-anthracenes (MA) were different in most crude oils and processed oils. The double ratio plots of MP and MA showed the most positive method to differentiate two refined products and crude oils. The results from weathering simulation showed that biomarkers were high degradation-resistant, however, hopanes distribution patterns were different between fuel oils and their crude oil feedstocks. In addition, the distribution pattern of hopanes biomarker in fresh or unused lube oil and used lube oil were dissimilar as they were generated or degraded during the combustion in the engine.
DOI: 10.13145/bacdive134992.20191129.4.1
title: Neisseria subflava

description: The range of data encompasses taxonomy, morphology, physiology, sampling and concomitant environmental conditions as well as molecular biology.
DOI: 10.13145/bacdive134993.20191129.4.1
title: Cardiobacterium hominis

description: The range of data encompasses taxonomy, morphology, physiology, sampling and concomitant environmental conditions as well as molecular biology.