Chiang Mai University journal of natural sciences最新文献_第7页

Dental Setting Design Guideline Adaptation in the COVID-19 Pandemic in Northern Thailand 泰国北部新冠肺炎大流行期间牙科设置设计指南的适应性

Chiang Mai University journal of natural sciences Pub Date : 2022-01-21 DOI: 10.12982/cmujns.2022.007

Piyadech Arkarapotiwong, Sumavalee Chindapol

{"title":"Dental Setting Design Guideline Adaptation in the COVID-19 Pandemic in Northern Thailand","authors":"Piyadech Arkarapotiwong, Sumavalee Chindapol","doi":"10.12982/cmujns.2022.007","DOIUrl":"https://doi.org/10.12982/cmujns.2022.007","url":null,"abstract":"Abstract Criteria for dental clinic design in Thailand are recommended by the Design and Construction Division, Department of Health Service Support, Ministry of Public Health. During the Coronavirus disease pandemic (COVID-19), there were several procedures regarding dental operations and infection prevention suggested by researchers and international health organizations, including the Centers for Disease Control and Prevention (CDC), and the World Health Organization (WHO). However, some criteria still have discrepancies in practice, since they have no definite correct answers. This research describes the dental clinic redesign for COVID-19 control using dental setting design guidelines in both Thailand and foreign countries. The re-designed planning of the clinic was reviewed by dentists, engineers, and physicians. The issue of concern is the cost and the design’s value in the disinfection of facilities. Significant proven methods of disinfection are used in this paper, including functional re-consideration, negative air pressure rooms, filters, Ultra-Violet devices, and ozonators. This research contributes to the literature by providing a functional diagram for dental clinic adjustment in the COVID-19 situation. The 12 air changes per hour (ACH) ventilation combined with management protocol ensures that patients’ safety is a priority and provides a feasible option for adaptation in a developing country such as Thailand. Keywords: Architectural design, COVID-19, Dental clinic, Guideline, Planning","PeriodicalId":10049,"journal":{"name":"Chiang Mai University journal of natural sciences","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-01-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42638925","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

High Fat Diet and Ethanol-Induced Fatty Liver Disease Mouse Model 高脂肪饮食与乙醇性脂肪肝小鼠模型

Chiang Mai University journal of natural sciences Pub Date : 2022-01-21 DOI: 10.12982/cmujns.2022.002

N. Sukkasem, W. Chatuphonprasert, K. Jarukamjorn

{"title":"High Fat Diet and Ethanol-Induced Fatty Liver Disease Mouse Model","authors":"N. Sukkasem, W. Chatuphonprasert, K. Jarukamjorn","doi":"10.12982/cmujns.2022.002","DOIUrl":"https://doi.org/10.12982/cmujns.2022.002","url":null,"abstract":"Abstract A diet high in fat and/or alcohol is a major cause of fatty liver disease (FLD), which is a common precursor to chronic liver disease. As the pathogenetic mechanisms of FLD remain unclear, an appropriate animal model is critical to problem solving in this field. This study aimed to develop an FLD mouse model using a diet high in fat and/or ethanol. Five-week-old female ICR mice were given free access to a high fat diet (HFD, 60 kcal % fat of total food), or daily intragastrically administered ethanol (E, 0.5 g/kg/day), or a combination of HFD and ethanol (HFD+E). Hepatic histology was observed with oil red O (ORO) staining. Hepatic triglyceride (TG) levels, antioxidant enzyme activities, and mRNA expression levels of metabolic, antioxidant, and inflammatory genes, i.e. peroxisome proliferator activated receptor-alpha and gamma (Ppar-α and Ppar-γ), sterol regulatory element binding protein-1 (Srebp-1), acetyl-CoA carboxylase (Acc), fatty acid synthase (Fas), fat cluster of differentiation (Cd-36), catalase (Cat), superoxide dismutase 1 and 2 (Sod1 and Sod2), glutathione peroxidase (Gpx), nuclear factor-kappa b (Nf-ĸb), tumor necrosis factor-alpha (Tnf-α), and monocyte chemoattractant protein-1 (Mcp-1) were determined. HFD+E induced FLD in mice by increasing hepatic TG levels and expression of Acc and Fas metabolic genes and Cd-36 and Mcp-1 inflammatory genes, while simultaneously reducing the activity and expression of antioxidant enzymes. These findings confirm that HFD+E is a potent regimen for FLD induction in mice. Keywords: High fat diet, Alcohol, Non-invasive, Antioxidation, Metabolic gene, Inflammatory gene","PeriodicalId":10049,"journal":{"name":"Chiang Mai University journal of natural sciences","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-01-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44958920","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

The Validity of Iscan’s Age Estimation Method applied to the Fourth Rib in a Thai Male population Iscan年龄估计方法在泰国男性第四肋骨的有效性研究

Chiang Mai University journal of natural sciences Pub Date : 2022-01-21 DOI: 10.12982/cmujns.2022.018

P. Siriphimolwat, Watha Minsan, Karnda Mekjaidee

{"title":"The Validity of Iscan’s Age Estimation Method applied to the Fourth Rib in a Thai Male population","authors":"P. Siriphimolwat, Watha Minsan, Karnda Mekjaidee","doi":"10.12982/cmujns.2022.018","DOIUrl":"https://doi.org/10.12982/cmujns.2022.018","url":null,"abstract":"Abstract Iscan’s staging method for age estimation from fourth ribs has been proved to be a potentially useful tool for various populations. However, due to interracial variations, it is necessary to calibrate its’ accuracy in reference to a population of Thai males before it can be applied. This study aimed to evaluate the validity of phasing analyses of sternal ends of fourth ribs developed by Iscan, et al., on a Thai male population. The Iscan’s method was applied to 50 Thai males aged 18 years and above. Staging of sternal ends of the ribs was analyzed based on 3 morphological features: pit depth, pit shape, and rim and wall configurations – designated as components 1, 2, and 3, respectively. The data was analyzed using descriptive statistics, one-way ANOVA, and cross-tabulation with Kendall’s Tau-c correlation. It was found that sternal end stages of fourth ribs in each component, inclusive of composite scores, are positively correlated to the age of the individual (P < 0.001). However, Iscan’s result - which was derived from a population of white males - delivers age-underestimation in a Thai population. Hence, we developed a modified age prediction reference table for application to Thai males. Applying cross-tabulation analysis, stages 1 and 2 were found only in individuals who were less than 40 years old, and stages 4 and 5 were found only in the 40 years and above age-group except for 1 case. Keywords: Age estimation, Fourth rib, Iscan’s method, Thai male","PeriodicalId":10049,"journal":{"name":"Chiang Mai University journal of natural sciences","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-01-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43063448","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Biodegradation of Microplastics by Microorganisms Isolated from Two Mature Landfill Leachates 两种成熟垃圾渗滤液中微生物对微塑料的生物降解

Chiang Mai University journal of natural sciences Pub Date : 2022-01-21 DOI: 10.12982/cmujns.2022.005

M. R. Pikoli, Puji Astuti, Festy Auliyaur Rahmah, Arina Findo Sari, N. Solihat

{"title":"Biodegradation of Microplastics by Microorganisms Isolated from Two Mature Landfill Leachates","authors":"M. R. Pikoli, Puji Astuti, Festy Auliyaur Rahmah, Arina Findo Sari, N. Solihat","doi":"10.12982/cmujns.2022.005","DOIUrl":"https://doi.org/10.12982/cmujns.2022.005","url":null,"abstract":"Abstract Microplastics are contaminants in the form of tiny plastic fragments diluted in terrestrial and aquatic environments. Recently, these contaminants have become a concern due to their negative impact on the quality of life of living things. The isolation and examination of microplastic degrading microorganisms' ability from two large mature landfills were conducted. Therefore, this study aims to obtain bacteria and fungi as bioremediation agents that can degrade microplastics. The isolation process was conducted by direct and indirect (enriched) methods. Nutrient agar and potato dextrose agar media were used either in the form of a full or a tenth of a recipe with the addition of polyethylene, polypropylene, and polystyrene microplastics. Furthermore, indirect isolation used mineral media treated with the same microplastics. Colony morphology was observed to be the difference among isolates. The isolates were selected based on their ability to produce lipase in butter agar, and their ability to use microplastic as the only carbon source was examined. A total of 211 isolates were obtained, consisting of 74 bacteria and 137 fungi. One-third of the total isolates produced lipase. A bacterial isolate with the highest lipase index identified based on the 16S rRNA gene showed that it was Bacillus paramycoides. The isolate used all three types of microplastics, with the highest ability in polystyrene, which was degraded up to 11.12% in 42 days. In conclusion, microorganisms isolated from the landfill leachate have potential as bioremediation agents that degrade microplastics. Keywords: Bacillus, Bacillus paramycoides, Biodegradation, Bioremediation, Landfill, Leachate, Microplastics, Polystyrene","PeriodicalId":10049,"journal":{"name":"Chiang Mai University journal of natural sciences","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-01-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43086770","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Chiang Mai University journal of natural sciences Pub Date : 2022-01-21 DOI: 10.12982/cmujns.2022.014

Chidchamai Kewcharoenwong, W. Khamduang, Supat Jiranusornkul, Yasir Nazir, S. Pornprasert

引用次数: 0

Characterization of Polylactic/Polyethylene glycol/Bone Decellularized Extracellular Matrix Biodegradable Composite for Tissue Regeneration 组织再生用聚乳酸/聚乙二醇/骨脱细胞细胞外基质可生物降解复合材料的表征

Chiang Mai University journal of natural sciences Pub Date : 2022-01-21 DOI: 10.12982/cmujns.2022.008

W. Wattanutchariya, Kullapop Suttiat

{"title":"Characterization of Polylactic/Polyethylene glycol/Bone Decellularized Extracellular Matrix Biodegradable Composite for Tissue Regeneration","authors":"W. Wattanutchariya, Kullapop Suttiat","doi":"10.12982/cmujns.2022.008","DOIUrl":"https://doi.org/10.12982/cmujns.2022.008","url":null,"abstract":"Abstract This study focused on evaluating the Polylactic acid /Polyethylene glycol (PLA/PEG) combining with bone decellularized extracellular matrix (bone dECM) as the alternative biodegradable material for tissue regenerative purposes. The casting membranes of pure PLA, PLA/PEG blend, and PLA/PEG combining with 5, 10 and 20 wt% bone dECM particles were fabricated and the characteristics of surface morphology, surface contact angle, thermal properties, cell viability, in vitro osteogenesis, and in vitro biodegradative behaviors were investigated. The improvement in hydrophilic characteristic was found in the developing composite. Following the in vitro degradation test in PBS/lysozyme for 7, 30, 60 and 90 days, the composite with higher ratio of bone dECM particles showed the higher percentage of material weight loss. However, the statistically significant of material weight alteration was observed only on the PLA/PEG/20wt% bone dECM after degradation test for 90 days (P ≤0.05). All specimens showed the physically intact at the end of the 90-day in vitro hydrolytic degradation test. The metabolic activities of L929 cells were significantly enhanced by the presence of PLA/PEG/bone dECM composites comparing to pure PLA (P ≤ 0.05). The result from Alizarin red S staining confirmed the osteo-inductive property of developing composite. The present study addressed the promising potential of PLA/PEG/bone dECM composites for applying as an alternative biodegradable material in tissue regenerative purpose. Keywords: Biomaterial, Biodegradable Composite, Bone Decellularized Extracellular Matrix, Polylactic Acid","PeriodicalId":10049,"journal":{"name":"Chiang Mai University journal of natural sciences","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-01-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49165975","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Variability of Nitrogen Mineralization from Organic Matter in Agricultural Soils in the North of Colombia 哥伦比亚北部农业土壤有机质氮矿化的变异性

Chiang Mai University journal of natural sciences Pub Date : 2021-10-01 DOI: 10.12982/CMUJNS.2021.073

E. Martínez-Mera, D. García-Paredes, A. Corrales, A. Torregroza-Espinosa

引用次数: 2

The Use of Hematological and Histopathological Biomarkers to Assess the Health of Aquatic Ecosystems in Koh Sichang, Thailand 使用血液学和组织病理学生物标志物评估泰国西昌岛水生生态系统的健康状况

Chiang Mai University journal of natural sciences Pub Date : 2021-09-01 DOI: 10.12982/cmujns.2021.085

A. Sopon, J. Kettratad, A. Piumsomboon, G. Kaneko, S. Senarat

{"title":"The Use of Hematological and Histopathological Biomarkers to Assess the Health of Aquatic Ecosystems in Koh Sichang, Thailand","authors":"A. Sopon, J. Kettratad, A. Piumsomboon, G. Kaneko, S. Senarat","doi":"10.12982/cmujns.2021.085","DOIUrl":"https://doi.org/10.12982/cmujns.2021.085","url":null,"abstract":"Abstract Koh Sichang area in Thailand is a sink for a wide variety of contaminants such as heavily polluted water from industry and oil spills. This situation may affect the health status of fish living in the area, but such information remains scarce. In this study, we evaluated the health status of java rabbitfish Siganus javus, an important marine fish in Koh Sichang, using hematological and histopathological biomarkers. All fish samples were collected from the Koh Sichang area during December 2017 and January 2018. Although the salinity, pH, and dissolved oxygen levels at sampling points were all within the normal range, abnormal nuclei were observed in erythrocytes (up to ~6% of all erythrocytes) and in some leucocytes (neutrophil, lymphocyte and monocyte). Visceral organs (gill, kidney and liver) were apparently normal in terms of gross morphology, but a wide variety of the histopathological alterations were found at the microscopic level: epithelial hyperplasia and aneurysm in gills; blood congestion and melanomacrophage centers (MMCs) in the liver; renal degeneration, granuloma and MMCs together with unidentified parasites in kidney. Calculation of semi-quantitative parameters [histological alteration index (HAI) and the average value of alteration (AVA)] demonstrated the highest frequency of histopathological alterations in kidney, suggesting that kidney is a sensitive organ. Overall, our observations suggest that S. javus in Koh Sichang is under the pathological state and warrants conservation efforts. Keywords: Erythrocytes, Fish Health, Hematology, Histopathology, Kidney","PeriodicalId":10049,"journal":{"name":"Chiang Mai University journal of natural sciences","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42729556","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Pasting Behavior and Viscoelastic Properties of Fresh, Chilled, and Rehydrated Freeze-Dried Gel Beads from Blends of Tapioca Flour, Soy Flour, and Cane Sugar 由木薯粉、大豆粉和蔗糖混合而成的新鲜、冷藏和再水合冷冻干燥凝胶珠的糊化行为和粘弹性

Chiang Mai University journal of natural sciences Pub Date : 2021-09-01 DOI: 10.12982/cmujns.2021.093

Nattagan Chantagith, Natnaree Katkaew, P. Rattanapitigorn

{"title":"Pasting Behavior and Viscoelastic Properties of Fresh, Chilled, and Rehydrated Freeze-Dried Gel Beads from Blends of Tapioca Flour, Soy Flour, and Cane Sugar","authors":"Nattagan Chantagith, Natnaree Katkaew, P. Rattanapitigorn","doi":"10.12982/cmujns.2021.093","DOIUrl":"https://doi.org/10.12982/cmujns.2021.093","url":null,"abstract":"Abstract An extreme vertices design for a mixture of three components was used to establish the proportions of tapioca flour (50% to 100% w/w), soy flour (0% to 50% w/w), and cane sugar (0% to 10% w/w) mass fractions in a food gel bead system. Thus, nine compositions were prepared and analyzed. The pasting profiles of the mixtures were studied using a Rapid Visco Analyzer. The texture profiles of fresh, chilled, and rehydrated freeze-dried gel beads were studied using a texture analyzer. Increasing the proportion of soy flour in the range of 11.25% to 50.00% w/w decreased the peak viscosity, breakdown, final viscosity, and setback of mixed flour. Tapioca flour in the proportion of 81.25% to 100.00% w/w recorded the lowest hardness of fresh gel beads (92.00 to 283.00 g). Soy flour in the proportion of 11.25% to 50.00% w/w exhibited lower texture profiles (hardness, chewiness, and gumminess) than tapioca flour in gel beads for both chilled and rehydrated freeze-dried gel beads. Significant relationships were found among pasting profiles of the flour mixtures and texture profiles of fresh, chilled, and rehydrated freeze-dried gel beads, implying a functional role for soy flour in food gel beads. In conclusion, soy flour can act as an anti-retrogradation agent for the gel beads both in chilled (stored at 4°C for 7 days) and freeze-dried conditions. A small amount of cane sugar does not affect the inhibition of starch retrogradation in the gel bead system. Keywords: Anti-retrogradation, Food gel bead, Pasting profile, Soy flour, Tapioca flour, Texture profiles","PeriodicalId":10049,"journal":{"name":"Chiang Mai University journal of natural sciences","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48612519","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Physicochemical Characterization, Phytochemical and HPTLC Fingerprinting Studies on Fruit of Couroupita Guianensis 桂皮Couroupita Guianensis果实理化性质、植物化学及高效液相色谱指纹图谱研究

Chiang Mai University journal of natural sciences Pub Date : 2021-09-01 DOI: 10.12982/cmujns.2021.078

L. A. Sheba, Anuradha Venkatraman

{"title":"Physicochemical Characterization, Phytochemical and HPTLC Fingerprinting Studies on Fruit of Couroupita Guianensis","authors":"L. A. Sheba, Anuradha Venkatraman","doi":"10.12982/cmujns.2021.078","DOIUrl":"https://doi.org/10.12982/cmujns.2021.078","url":null,"abstract":"Abstract Traditional knowledge and literature studies report that each part of a plant has tremendous medicinal values. Validation of these medicinal plants scientifically is an important criterion for the development of plant-based drugs. Couroupita guianensis (Family: Lecythidaceae) is a plant with immense medicinal properties. To authenticate its biological value, the present investigation aims to standardize the fruit of C. guianensis based on physicochemical characterization, phytochemical analysis both qualitatively and quantitatively, and high-performance thin-layer liquid chromatography (HPTLC) fingerprinting studies. Fruit pulp of C. guianensis was obtained, processed and extracted with solvents such as petroleum ether, chloroform, ethanol and hydroalcohol. Moisture content, total ash, water-soluble ash and acid-insoluble ash values were calculated. Preliminary phytochemical analysis revealed the existence of several secondary metabolites in the extracts. In addition, interpreting peaks obtained from HPTLC analysis revealed the presence of potential bioactive phytoconstituents in all the extracts. The quantitative determination proclaimed that fruit pulp was found to be rich in phenolics and flavonoids followed by tannin and saponin. Further, primary metabolites were quantified and they were found to be abundant in the fruit pulp. Henceforth, the outcome of these results provides information for assessing the quality of the sample that could help in ensuring its therapeutic efficacy. Keywords: Couroupita guianensis, HPTLC, Physicochemical characterization, Phytochemical, Fingerprinting","PeriodicalId":10049,"journal":{"name":"Chiang Mai University journal of natural sciences","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45820884","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0