cometadata/datacite-titles-descriptions-related-identifiers huggingface dataset:
DOI: 10.14457/cu.the.2014.398
title: BIODEGRADATION OF 17ALPHAMETHYLTESTOSTERONE BY MICROORGANISM ISOLATED FROM MASCULINIZING PONDS OF NILE TILAPIA FRY

description: 17α-methyltestosterone (MT) is a synthetic androgenic steroid, which is widely used in masculinization of aquaculture industry. Male population is preferred in a farming of Nile tilapia because of the faster growth rate, bigger body size and larger weight than the female. Although MT is beneficial for aquaculture production, the release of residual causes adverse effects to the endocrine and reproductive systems of natural aquatic organisms. This study aims to isolate the MT degrading microorganisms and to investigate the biodegradation characteristic, in order to enhance the biological removal. The isolation was performed with enrichment technique using MT as a sole carbon source at concentrations between 0.5 to 30 mg/L. The inoculum sources were sediment and biofilm from masculinizing ponds of Nile tilapia fry. Three strains, namely B051, B052 and S303 which affiliated to Acinetobacter sp., Ochrobactrum sp. and Nocardioides sp., respectively, were tested for the MT degrading kinetic and substrate versatility among other sex steroidal hormones which may coexist in farm environment. Michaelis-Menten model well explained the MT degrading kinetic for the 1 – 50 mg/L. The Vmax and Km value of strain B051, B052 and S303 were 0.34 ngL-1h-1cell-1 and 8.23 mg/L, 0.18 ngL-1h-1cell-1 and 1.48 mg/L, 0.24 ngL-1h-1cell-1and 1.0 mg/L, respectively. Strain S303 was distinguished MT degrader as it had higher Vmax and it had the lowest Km, which can imply that strain S303 had ability to degrade MT faster than the others at low concentration close to environmental condition. In addition, all isolates also removed testosterone while they had not reduced estrone (E1), 17β-estradiol (E2) or17α-ethynylestradiol (EE2) at the concentration of 10 mg/L during 7 days. The results inferred that all three isolates are specialized in androgenic hormone degradation.
DOI: 10.14457/cu.the.2014.399
title: REMOVAL OF DISINFECTION BY-PRODUCTS IN WATER BY ADSORPTION ON THIOL-FUNCTIONALIZED MESOPOROUS MATERIAL

description: The main objective of this research is to study the removal of disinfection by-product (DBPs) in water by adsorption on thiol-functionalized mesoporous material. Thiol-functionalized mesoporous composite based on natural rubber and hexagonal mesoporous silica (NR/HMS-SH) was synthesized to investigate adsorption efficiency and mechanism compared with powder activated carbon (PAC). Fourier-transform infrared spectroscopy (FTIR) results revealed the functional group of NR/HMS-SH and the sulfur content that confirming the presence of thiol group was measured by elemental analyzer. X-ray diffraction (XRD) was used to evaluate crystalline structure and analyze the structure of NR/HMS-SH. Moreover, adsorption kinetics and isotherm models were used to determine the adsorption mechanism and the adsorption selectivity of adsorbent on adsorption of DBPs in tap water was investigated. The result indicated that adsorption onto the NR/HMS-SH and PAC of dichloroacetronitrile (DCAN), trichloromethane (TCM) and 1,1,1-trichloroacetone (C3H3Cl3O) presence the higher adsorption capacity than dichloroacetic acid (DCAA). Furthermore, the different molecular structure of HANs and the ion-dipole electrostatic interaction of TCM and C3H3Cl3O affected the adsorption capacity and selectivity in both of single and mixed solute. In addition, the result of natural organic carbon (NOM) showed that the hydrophobic (HPO) NOM decreased the adsorption capacity of DCAN adsorption on synthesized material while hydrophilic (HPI) NOM did not prefer the decreasing of adsorption capacity on NR/HMS-SH. It might be cause of the adsorption competition on adsorbent surface.
DOI: 10.14457/cu.the.2014.400
title: KOREAN LANGUAGE STRATEGIES AND MOTIVATION OF SECONDARY SCHOOL STUDENTS IN NAKHON SI THAMMARAT

description: The purpose of this study aims to investigate the Korean language learning strategies and motivation of secondary school students in Nakhon Si Thammarat. To make a comparison between learning strategies in Korean language. The population of this research is secondary students who study Korean language as foreign language at school. Quantitative method was used to collect and analyze the data. This study uses a questionnaire to survey; 199 Thai students. Populations are from four schools that taught Korean language in Nakhon Si Thammarat. The results of the study were as follow: 1) Thai secondary students use meta-cognitive strategies and social strategies to study Korean language; 2) Thai secondary students have integrative motivation toward Korean language learning more than instrumental motivation; 3) The relationship between learning strategies and motivation of secondary students to study Korean language in Nakhon Si Thammarat is significantly relevant. The students who have high motivation will clearly have high learning strategies.
DOI: 10.14457/cu.the.2014.401
title: REMOVAL OF LIGNIN IN PULPING WASTEWATER BY HETEROGENEOUS FENTON-LIKE PROCESS USING IRON MOLYBDATE

description: Pulping industry consumes high amount of raw materials and chemical reagents in each process and wastewater problem from Pulp industries is one of the most concern. One of concerned wastes is black liquor which contains high lignin content. Lignin causes environmental problems such as increase oxygen demand and can be changed to be toxic by-products such as phenols, ketone and carboxylic acids. Therefore, wastewater treatments are required before discharge to environment. This research studied on the treatment of synthetic pulping wastewater. The treatment of synthetic pulping wastewater was carried out by Fenton process using ferrous sulfate and heterogeneous Fenton-like process using iron molybdate to find the optimum conditions for color and lignin removal. Furthermore, iron molybdate was reused to find its durability. The initial lignin concentration of synthetic pulping wastewater was 910 mg/l. The result of Fenton process showed that at pH of 3, Fe2+:H2O2 ratio of 1:2.5 and Fe2+ dosage was 400 mg/l achieved 92%, 90% and 92% for lignin, color and COD removal efficiencies, respectively. The result of heterogeneous Fenton-like process showed that at pH of 8, Fe3+:H2O2 ratio of 1:10 and 2 g/l Fe3+ dosage, lignin, color and COD removal efficiency were achieved 71%, 67% and 67%, respectively. Moreover, iron molybdate could maintain its durability after four times reuse. Although using of iron molybdate in heterogeneous Fenton-like process showed lower performance than using of ferrous sulfate in Fenton process, it could overcome several drawbacks of Fenton process e.g. no sludge iron, could be applied in wide range of pH, and maintain its performance after several times reused.
DOI: 10.14457/cu.the.2014.402
title: REMOVAL OF LIGNIN IN WASTEWATER FROM PULPING PROCESSES BY FENTON AND MODIFIED-FENTON PROCESSES

description: Lignin is the organic compound in pulp mill wastewater that can cause high level of color and toxicity pollutant to living organisms. Therefore, pulp and paper industries needed to be treated prior to discharge into the environment. Advanced oxidation processes by Fenton and modified-Fenton were investigated in order to determine the process optimization and performance of reaction. The effect of operating parameter included ratio of Fe2+ and H2O2, initial pH, chemicals dosage, step feeding operation and current density were investigated to indicate the optimum operating conditions. Results showed that the performance of the process when using step feeding of both Fe2+ and H2O2 was found to be the highest oxidation efficiency on color, lignin and COD removal because this operation could reduce the scavenging effect on the reaction process. 45% of color removal, 39% of lignin removal and 38% of COD removal in term of oxidation efficiency were achieved in 1 hour under Fe2+ to H2O2 ratio of 1:2.5, initial pH of 3 and Fe2+ concentration of 400 mg/l. Moreover, this operation also reduce the sludge production of 20.7% at the same removal efficiency as initial feeding. For electro-Fenton process, optimum operating conditions were found to be Fe2+ to H2O2 ratio of 1:1 and current density of 200 A/m2. However, removal efficiency in electro-Fenton was less than step feed operation in Fenton due to no Fe2+ regeneration. Thus, Fenton process with step feeding mode operation was effective for the treatment of pulp mill wastewater.
DOI: 10.14457/cu.the.2014.403
title: TREATMENT OF STABILIZED CUTTING OIL WASTEWATER BY FENTON PROCESS: EFFECT OF FENTON'S REAGENTS DOSAGE AND FEEDING MODE

description: The objective of this research is to investigate the treatment of the stable cutting oil wastewater by Fenton process, an advanced oxidation used as a post-treatment process. Hydroxyl radical can be produced by the reactions between the Fenton's reagents including ferrous (Fe2+) and hydrogen peroxide (H2O2). The result showed that highest COD removal efficiencies of 97% can be achieved for treating 100 and 150 mg/l oil concentration with 200 mg Fe2+/l and 1:2.5 of Fe2+/H2O2 ratio, while 98% of 50 mg/l oil concentration can be succeeded at 200 mg Fe2+/l and 1:10 of Fe2+/H2O2 ratio in 1 minute reaction time. However, excess Fenton’s reagents cause lower oxidation of cutting oil due to hydroxyl radical scavenging effect. The multiple step feedings were therefore applied. The result showed that three feedings of 16.67 mg Fe2+/l and 41.67 mg H2O2/l at t = 0, 5, and 10 minutes reaction time provided COD removal efficiency as high as initial full feeding of 200 mg Fe2+/l and 500 mg H2O2/l (97%). After cutting oil was oxidized by Fenton, pH of the treated water was acidic, which cannot be discharged to an environment. Therefore, the pH neutralization by NaOH was conducted. This pH adjustment causes the iron precipitation, which required the sedimentation to remove. The optimum overflow rates of sedimentation tank for 50 mg Fe2+/l and 200 mg Fe2+/l were in range of 0.2 – 0.45 m/h and 0.7 – 1.9 m/h, respectively. In addition, reuse of iron sludge in the Fenton reaction was carried out in order to minimize the sludge production and reduce the disposal cost. The sludge from 50 mg Fe2+/l and 125 mg H2O2/l can be reused to treat 100 mg/l oil concentration without replacement at least 5 recycling times.
DOI: 10.14457/cu.the.2014.404
title: OUTSIDE THE OLD ENCLAVE: A NEW CHINESE IMMIGRANT NEIGHBORHOOD IN BANGKOK

description: Bangkok's Chinatown has a history of over 233 years, since 1782. Though its geographical spread has stopped, it is still a community filled with vibrant economic and cultural activities. As Chinatown’s expansion slows, a new Chinese immigrant neighborhood emerges in a different location. Here you can easily find evidence of Chinese presence. For the Chinese newcomers who decide to stay longer in Bangkok, this new neighborhood is an ideal living area. This research was conducted in order to gain a better understanding of new Chinese immigrants and their neighborhood in Bangkok. Two main international migration theories were adopted for the conceptual framework: “Push-pull” factors theory analyzes the reasons for coming to the neighborhood, and 4-stage model of immigrant settlement theory evaluates the formation, function and maintaining of the new immigrant neighborhood. Qualitative methods of interview (semi-structured and in-depth), non-participate observation, community mapping and document reviewing revealed that most new Chinese immigrants in Bangkok today come for better development. The new neighborhood mainly functions as a residential and business zone; the most important way to maintain their new neighborhood is business nexus. Findings show that the newcomers are very different to the old Chinese immigrants. This research also provides some recommendations for relevant policy makers both in Thailand and China in order to help new immigrants integrate better into the host country. It proves that some classical international immigrant theories are not suitable for analyzing the current international immigration trends because of the ever-changing characteristics of international immigrants and the global environment.
DOI: 10.15468/s3pdk1
title: Discovery and description of a mysterious Asian flying squirrel (Rodentia, Sciuridae, Biswamoyopterus) from Mount Gaoligong, southwest China

description: This dataset contains the digitized treatments in Plazi based on the original journal article Li, Quan, Li, Xue-You, Jackson, Stephen M., Li, Fei, Jiang, Ming, Zhao, Wei, Song, Wen-Yu, Jiang, Xue-Long (2019): Discovery and description of a mysterious Asian flying squirrel (Rodentia, Sciuridae, Biswamoyopterus) from Mount Gaoligong, southwest China. ZooKeys 864: 147-160, DOI: http://dx.doi.org/10.3897/zookeys.864.33678, URL: http://dx.doi.org/10.3897/zookeys.864.33678
DOI: 10.25912/5d3110b79cd07
title: Vernix OzID data
DOI: 10.14457/cu.the.2014.405
title: CAMBODIAN MIGRANTS’ SOCIAL PROTECTION, LOCAL INTEGRATION AND MULTIPLE BOUNDARIES IN THE THAI BORDER VILLAGES OF KHOK SUNG, SA KAEO PROVINCE

description: This thesis is designed to examine the local integration and social protection for Cambodian migrants in the Thai border villages of Khok Sung district, Sa Kaeo province. Cambodian migrants can be divided into three groups: former refugees, intermarriage migrants and current migrant workers. Much attention is paid to the migrants’ negotiation the multiple boundaries of physical, social and legal in order to see how local integration and local acceptance are met and transformed into social protection. In order to see the phenomenon from the inclusive view points, this study also covers the causes of the migration flow into the preferred destination in which links to the geographic, historical and demographic conditions of ethnic relations between Thai-Cambodian borders’ population. The research methods draw upon extensive interview with more than one hundreds interviewees and key informants and also apply with ethnographical technique of non-participant observation. I visited the migrants and local people with different villages, seeing their livelihoods, attitudes and perceptions from migrants and local citizens to find out the different limitations of existing social protection items for migrants from local collective practice and state based mechanism. This study reveals that migrants’ settlement and local integration process are strongly influenced by ethnic and intermarriage relations between Cambodian migrants and host citizens in Khok Sung district. These conditions provide the migrants with the networks as supporting systems and the sympathizers in the receiving society. The migrants seem to be recognized by the local villagers or by themselves as the members of host community in a different way than what outsiders would imagine so-called migrants and aliens. They are totally included into community welfare and insurance programs except only what are so called legal barriers and selective included by state based mechanism into social protection schemes. Therefore, it seems that the differences of existing social protection items from the community and the state can eventually able to supplement some roles during the absence of one another.
DOI: 10.14457/cu.the.2014.406
title: Labour Migration, Human Security and Migration Impacts in Rural Cambodia: Case Study in Kampong Thom Province

description: In recent years, academic and the non-governmental organizations have urged the Cambodian Government to provide migrants with information to inform their decisions better. Yet, such needed information have not been empirically researched. Through a field-based survey, this paper seeks to develop rich and illustrative accounts of why rural Cambodians migrate, the options they have, how they decide on which option to take and the implications of such decision-making. This study found that labour migration in rural Cambodia is primarily motivated by economic factors, with most migrants aspiring to migrate for work to earn more income, so as to return back to their “homeland” with more economic resources. This study also found that labour migrants not only have to choose the geographical locality to migrate to, they also have to choose the types of job and whether to migrate legally or illegally. Even within the same locality, the legal status and the nature of jobs have significant implications on the migration outcomes. Also, this paper found that migration outcomes are often determined by factors that are beyond the control of the migrant, but rather are dependent on the employer and middlemen engaged. Instead, what a migrant can control is how he or she collects information and make decisions that minimizes risks and focuses on attaining their migrant aspirations. This paper found that those who react to migration information critically, based their decisions on lessons learnt from past migration episodes, and are informed by a longer-term strategy, tend to be more successful in attaining their desired migration aspirations.
DOI: 10.14457/cu.the.2014.407
title: Access to and usage of clean water in peri-urban Vietnam : a case study of Gia Lam district, Hanoi

description: It is broadly recognized that water plays an important role in sustainable development, especially for poverty reduction. The challenge is how to ensure water quality and quantity is adequate. Piped water is highly recommended to be used in communities because it is treated properly and can reduce exploitation of groundwater from scattered private wells. In peri- urban Vietnam, the local government of Gia Lam district in Hanoi has made a great deal of effort to set up a piped supply to communes but still usage is low. The purpose of this research is to investigate the situation of clean water usage, analyze the factors which affect to water usage in Gia Lam district and evaluate how water governance in the field works. With this, it hopes to find some solutions to improve clean water usage for the locals in the future. Findings from the research show that the level of clean water usage is not high and there is inequality in usage. The key elements which affect to clean water usage in communes which are covered by piped supply are income, the demography of households and education of household headman. Those communes without access to a piped supply are mainly geographically difficult for water mills to reach. Evaluation shows that in Gia Lam district domestic water governance does not work because it does not achieve the transparency, communication and accountability. From what has been discovered, the study discloses that to improve clean water usage in the district it is necessary to consider how to improve water governance. Also solutions are needed for the challenges affecting clean water usage for communes with and without a piped supply. The research highlights the necessity of clear mandate mechanisms through specific documents, guidelines to all levels, and responsibilities of the district government to be transparent to increase the communicative activities among stakeholders, efficiency and enhance accountability. The paper closes with the some recommendations for specialized ministries, departments, Gia Lam district government to water suppliers to facilitate the implementation of some solutions above. It calls for coordination between relevant agencies vertically and horizontally, with guidelines to Gia Lam district government to deploy water management more effectively.
DOI: 10.14457/cu.the.2014.408
title: THE DYNAMICS OF LOCAL AGRICULTURAL KNOWLEDGE AND SUSTAINABILITY: A CASE STUDY OF A PA-O COMMUNITY IN SHAN STATE, BURMA

description: The Pa-O, the seventh largest ethnic group in Burma, engage primarily in agriculture, having practiced traditional farming methods for generations. However, in the past few decades, they have started adopting new knowledge from industrial agriculture. This is their strategy to sustain their livelihood endangered by the decreasing amount of land in ratio to the increasing population. This strategy, however, has not proved to be feasible as Pa-O farmers have to rely on input-intensive farming methods leading to more expenses and less income. This has resulted in heavy debt among farmers, out-migration of the young Pa-O, and intensifying environmental issues. Drawing upon the in-depth interviews with Pa-O farmers, NGO workers and agricultural experts in Southern Shan Region, this thesis examines the dynamics of change in local agricultural knowledge of the Pa-O and its impact on their livelihood sustainability. This thesis argues that the integration of new knowledge from industrial agriculture cannot bring about sustainability because this new knowledge cannot solve the issues of population and land scarcity. This analysis enables us to understand the process of change in local agricultural knowledge of the Pa-O and challenges imposed on the sustainability of their livelihood.
DOI: 10.14457/cu.the.2014.409
title: NETWORKS OF PRACTICE AROUND OPEN SCIENCE: A CASE STUDY ON THE HOUSE OF NATURAL FIBER FOUNDATION IN YOGYAKARTA, INDONESIA

description: Open science is a burgeoning concept and practice that promotes the production of scientific knowledge in a way that is accessible, transparent, and inclusive; in this sense, it is relevant to development studies. The house of Natural Fiber Foundation has been involving the practice of science, as well as art and other creative endeavors, in Yogyakarta, Indonesia since 1999. In the process, the House of Natural Fiber Foundation has created a cosmopolitan network of participants and collaborators, which has implemented various interdisciplinary projects and events between formal and informal institutions of science. This thesis assesses this network’s diversity and its views on openness, collaboration, science, and community development. There is a profound gap in research regarding open science communities in Asia, much less Indonesia, and the work of these communities is critical for understanding the potential for international development efforts both locally and internationally. Through a combination of participant observation, textual and web analysis, key informant interviews, and survey questionnaires, this research found that the community of practice around open science in Yogyakarta has the potential to represent a model for community development.