Ceylon Journal of Science最新文献_第4页

Proximate composition, bioactive constituents, and therapeutic potentials of pasteurized Noni juice derived from Morinda citrifolia (L.) growing in Sri Lanka 从生长在斯里兰卡的海巴戟中提取的巴氏杀菌诺丽果汁的近似成分、生物活性成分和治疗潜力

Ceylon Journal of Science Pub Date : 2024-02-12 DOI: 10.4038/cjs.v53i1.8141

H. G. A. S. Samarasinghe, K. Gunathilake, D. C. K. Illeperuma

{"title":"Proximate composition, bioactive constituents, and therapeutic potentials of pasteurized Noni juice derived from Morinda citrifolia (L.) growing in Sri Lanka","authors":"H. G. A. S. Samarasinghe, K. Gunathilake, D. C. K. Illeperuma","doi":"10.4038/cjs.v53i1.8141","DOIUrl":"https://doi.org/10.4038/cjs.v53i1.8141","url":null,"abstract":"Morinda citrifolia (L.), also known as Noni or Ahu in Sri Lanka, is infrequently consumed as a dietary supplement within the country due to its association with myths and perceived toxicity. Nonetheless, in Sri Lanka, limited scientific research has been undertaken in the past to explore the therapeutic potential of noni, with public awareness primarily focused on its exportdriven cultivation. The study focused on evaluating the proximate composition, bioactive constituents, and therapeutic potential of hydro-methanolic extracts from pasteurized noni fruit juice, employing an 80% methanol extraction method, filtration, and assessment through standard assays to elucidate its potentia health benefits. The juice showed noteworthy antioxidant potential through DPPH scavenging activity (57.90 ± 0.40 μg/mL) and ABTS scavenging activity (42.95 ± 1.33 μg/mL), as well as high nitric oxide inhibition activity (164.56 ± 3.22 μg/mL), suggesting its anti-inflammatory properties. The juice also displayed potential as an anti-diabetic agent by inhibiting alpha-amylase (27.68 ± 0.36 μg/mL) and alpha-glucosidase (25.67 ± 1.03 μg/mL). Furthermore, it exhibited potential in protecting against certain pathological processes through heat-induced hemolysis inhibition (36.08 ± 1.08 μg/mL), protein denaturation inhibition (56.14 ± 1.11 μg/mL), and proteinase inhibitory activity (38.04 ± 0.56 μg/mL). These findings support the potential use of pasteurized fruit juice as a functional food ingredient, offering benefits to both the food industry and consumers. Further research can be directed towards the development of Noni fruit-incorporated food products that possess desirable sensory attributes to mitigate any potential aversion associated with its taste and odor profiles.","PeriodicalId":9894,"journal":{"name":"Ceylon Journal of Science","volume":"58 39","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-02-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139844676","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

Corrosion analysis of orthodontic brackets and arch wires – An in vitro study 正畸托槽和弓丝的腐蚀分析 - 体外研究

Ceylon Journal of Science Pub Date : 2024-02-02 DOI: 10.4038/cjs.v53i1.8316

D. M. L. Wijesinghe, W. Gunathilake, W. B. M. C. R. D. Weerasekera, U. J. M. A. L. Jayasinghe

{"title":"Corrosion analysis of orthodontic brackets and arch wires – An in vitro study","authors":"D. M. L. Wijesinghe, W. Gunathilake, W. B. M. C. R. D. Weerasekera, U. J. M. A. L. Jayasinghe","doi":"10.4038/cjs.v53i1.8316","DOIUrl":"https://doi.org/10.4038/cjs.v53i1.8316","url":null,"abstract":"Orthodontic plates are fixed onto the teeth in a dynamic environment in the oral cavity. The Orthodontic appliances, which includes both the brackets and the arch wires, are exposed to different pH fluctuations in the mouth. These appliances are manufactured using metal alloys that made out from nickel, iron, cadmium and titanium. These are commercially available in Sri Lanka and in the international market in different prices covering a large price range. Recent studies are investigating on the biocompatibility of these materials with the aim of determining the upper limit of the biological tolerance and to find methods to maintain ion release within acceptable limits. According to the previous studies there are evidences that the Ni and Cr ions release from Ni-Cr alloy in the presence of different acidity of artificial saliva. In this research in vitro corrosion process of selected orthodontic wires in artificial saliva solutions were evaluated with the aim of identifying a relationship between the quality and the price of selected orthodontic appliances available in Sri Lankan market. Eighteen specimens from different brands were selected and immersed in each of different types of artificial saliva at different pH, for different storage periods. All the sample tubes were incubated at 37°C. The release of metal ions from specimens with time were studied by conductivity, Atomic Absorption Spectroscopic (AAS) and mass loss measurements. According to the results, all specimens prepared using Ni -Ti wires release Ni²⁺ in the range between 9 ppm – 20 ppm during one year study period. Ni²⁺ concentration in all saliva solutions has increased with time and in specimens B, D, E, F the Ni²⁺ releasing rates were decreased with time. According to this study, all brands of brackets which were used in this study may lead to develop nickel hypersensitivity with time.","PeriodicalId":9894,"journal":{"name":"Ceylon Journal of Science","volume":"40 30","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-02-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139811596","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

Corrosion analysis of orthodontic brackets and arch wires – An in vitro study 正畸托槽和弓丝的腐蚀分析 - 体外研究

Ceylon Journal of Science Pub Date : 2024-02-02 DOI: 10.4038/cjs.v53i1.8316

D. M. L. Wijesinghe, W. Gunathilake, W. B. M. C. R. D. Weerasekera, U. J. M. A. L. Jayasinghe

{"title":"Corrosion analysis of orthodontic brackets and arch wires – An in vitro study","authors":"D. M. L. Wijesinghe, W. Gunathilake, W. B. M. C. R. D. Weerasekera, U. J. M. A. L. Jayasinghe","doi":"10.4038/cjs.v53i1.8316","DOIUrl":"https://doi.org/10.4038/cjs.v53i1.8316","url":null,"abstract":"Orthodontic plates are fixed onto the teeth in a dynamic environment in the oral cavity. The Orthodontic appliances, which includes both the brackets and the arch wires, are exposed to different pH fluctuations in the mouth. These appliances are manufactured using metal alloys that made out from nickel, iron, cadmium and titanium. These are commercially available in Sri Lanka and in the international market in different prices covering a large price range. Recent studies are investigating on the biocompatibility of these materials with the aim of determining the upper limit of the biological tolerance and to find methods to maintain ion release within acceptable limits. According to the previous studies there are evidences that the Ni and Cr ions release from Ni-Cr alloy in the presence of different acidity of artificial saliva. In this research in vitro corrosion process of selected orthodontic wires in artificial saliva solutions were evaluated with the aim of identifying a relationship between the quality and the price of selected orthodontic appliances available in Sri Lankan market. Eighteen specimens from different brands were selected and immersed in each of different types of artificial saliva at different pH, for different storage periods. All the sample tubes were incubated at 37°C. The release of metal ions from specimens with time were studied by conductivity, Atomic Absorption Spectroscopic (AAS) and mass loss measurements. According to the results, all specimens prepared using Ni -Ti wires release Ni²⁺ in the range between 9 ppm – 20 ppm during one year study period. Ni²⁺ concentration in all saliva solutions has increased with time and in specimens B, D, E, F the Ni²⁺ releasing rates were decreased with time. According to this study, all brands of brackets which were used in this study may lead to develop nickel hypersensitivity with time.","PeriodicalId":9894,"journal":{"name":"Ceylon Journal of Science","volume":"39 11","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-02-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139871779","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

Isolation of a potential rock phosphate solubilizing Aspergillus sp. towards development of biofertilizer 为开发生物肥料分离潜在的岩石磷酸盐溶解曲霉菌孢子

Ceylon Journal of Science Pub Date : 2024-01-31 DOI: 10.4038/cjs.v53i1.8168

L. R. L. S. Kumari, A. Senaratne, W. R. P. Wijesinghe

{"title":"Isolation of a potential rock phosphate solubilizing Aspergillus sp. towards development of biofertilizer","authors":"L. R. L. S. Kumari, A. Senaratne, W. R. P. Wijesinghe","doi":"10.4038/cjs.v53i1.8168","DOIUrl":"https://doi.org/10.4038/cjs.v53i1.8168","url":null,"abstract":"Phosphorus (P) is one of the key bio elements that limits agricultural production. Although Sri Lanka is endowed with rock phosphate deposits, practical means to utilize this resource are limited. Phosphate-solubilizing fungi (PSF) play an important role in enhancing the bioavailability of soil phosphorus to plants. In this study, fungi from eight soil samples in Kaikawala, Sri Lanka, were isolated using spread plate method and analyzed for its phosphate solubility capacity. One fungal isolate with significant halo zones on Pikovskaya’s agar (PVK) plates, containing 0.5% tricalcium phosphate, was identified. After purification, the isolate was transferred to three media setups: PVK with 0.5% apatite (ERP) as the phosphate source, PVK with 0.5% tricalcium phosphate as a positive control, and PVK without P source as a negative control and analyzed for the solubilization index (SI). DNA sequences of the internal transcribed spacers with 5.8S region of ribosomal DNA (ITS1-5.8S-ITS2) was analyzed with universal primer pair ITS4-F/ITS5-R to determine the identity of the species. Fungal isolate PSF01 showed a phosphate solubilizing activity on both PVK media, ERP (1.07 ± 0.03 cm SI) and tricalcium phosphate (1.07 ± 0.01 cm), with similar effects (p > 0.05). However, the SI in the negative control was 1.00 ± 0.00 cm without halo zone (p < 0.05). The fungal strain is fast growing with initially white but quickly changing to black colonies after producing conidial spores on potato dextrose agar with distinctive conidial heads and pale-yellow lower surface characterized as Aspergillus. Sanger DNA sequencing identified the fungus as Aspergillus niger (99%) and a phylogenetic tree was constructed using MEGA11 software using reference data obtained from NCBI GenBank data to identify the isolated PSF01. Consequently, our preliminary studies demonstrate the importance of examining more soil samples to identify PSF for sustainable agricultural applications in the future.","PeriodicalId":9894,"journal":{"name":"Ceylon Journal of Science","volume":"196 2","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-01-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140473130","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

Nutritional, anti-nutritional, and sensory properties of cowpea hull-enriched Gari 富含豇豆壳的 Gari 的营养、抗营养和感官特性

Ceylon Journal of Science Pub Date : 2024-01-22 DOI: 10.4038/cjs.v53i1.8111

Ibukunoluwa F Olawuyi, G. M. Olapade, O. R. Karim, O. A. Abiodun, K. O. Salami, O. Akintayo

{"title":"Nutritional, anti-nutritional, and sensory properties of cowpea hull-enriched Gari","authors":"Ibukunoluwa F Olawuyi, G. M. Olapade, O. R. Karim, O. A. Abiodun, K. O. Salami, O. Akintayo","doi":"10.4038/cjs.v53i1.8111","DOIUrl":"https://doi.org/10.4038/cjs.v53i1.8111","url":null,"abstract":"In continuous search for solutions to malnutrition, mainly prevalent among the people of developing countries, various views have been expressed regarding the necessity to improve the nutritional quality of indigenous foods such as gari through better processing and enrichment with cheap and readily available plant materials such as cowpea hull. Gari was produced using the traditional method and enriched with freshly produced cowpea hull in dry form to improve the nutritional composition. The objective of this study was to determine the effect of stages of inclusion of cowpea hull on some quality attributes of gari. Factorial design of 2 stages of inclusion (before and after fermentation) with 4 levels (0 %, 3 %, 5 % and 7 %) of cowpea hull treatments and standard methods were used to analyze the enriched gari (EG). The results of the proximate analysis of gari revealed that as inclusion level increases crude fibre, ash and crude protein contents increased in the fermented EG. Enrichment caused a significant (p<0.05) increase in the minerals and the amino acid profile compared to the control while fermentation caused a significant increase in vitamins content of EG. The titratable acidity of the EG may be linked to the increase in amino acid content of the samples, and pH ranged from 3.87 to 3.99. Fermentation of the cowpea hulls with cassava mash significantly enhanced the sensory characteristics and make them acceptable than their unfermented counterpart. Based on the results, it is recommended to enrich gari by incorporating 7% cowpea hull that have undergone fermentation with cassava mash.","PeriodicalId":9894,"journal":{"name":"Ceylon Journal of Science","volume":"9 5","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-01-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139607576","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

Potential use of plant leaves and sheath as food packaging materials in tackling plastic pollution: A Review 利用植物叶片和叶鞘作为食品包装材料解决塑料污染问题的潜力：综述

Ceylon Journal of Science Pub Date : 2024-01-17 DOI: 10.4038/cjs.v53i1.8145

S. Kalina, R. Kapilan, I. Wickramasinghe, S. B. Navaratne

引用次数: 0

In-vitro antibacterial activity of Boerhavia diffusa leaf extract against Staphylococcus aureus and Escherichia coli 白苧叶提取物对金黄色葡萄球菌和大肠杆菌的体外抗菌活性

Ceylon Journal of Science Pub Date : 2024-01-17 DOI: 10.4038/cjs.v53i1.8314

A. H. Y. G. Abhayarathna, C. Mahendranathan

{"title":"In-vitro antibacterial activity of Boerhavia diffusa leaf extract against Staphylococcus aureus and Escherichia coli","authors":"A. H. Y. G. Abhayarathna, C. Mahendranathan","doi":"10.4038/cjs.v53i1.8314","DOIUrl":"https://doi.org/10.4038/cjs.v53i1.8314","url":null,"abstract":"Plants are playing a significant role in maintaining human health and improving the wealth of human life and are a better alternative to synthetic drugs that display negative side effects, such as sensitization reactions, and disruption of the metabolic processes in the body via interaction with the body system. The main objective of this study was to evaluate the in-vitro antibacterial activity of Green Leafy Vegetable (GLVs), namely Boerhavia diffusa. Fully matured fresh leaf samples were collected from different localities in the Western Province, Sri Lanka. The acetone, ethanol and aqueous extracts of leaf samples were tested for antibacterial activity against Escherichia coli (E. coli) and Staphylococcus aureus (S. aureus), by using agar well diffusion method at the test concentrations of 0.25, 0.50 and 0.75 mg/μL. The maximum inhibitory effect was observed in the ethanol extracts of leaf samples against both bacterial strains at 0.75 mg/μL concentration. Ethanol extract of B. diffusa showed the maximum inhibition effect (17.8±0.3 mm) against S. aureus and it was the most susceptible bacteria than E. coli in plant extracts of all three solvents. All three extracts of B. diffusa showed most effective antibacterial activity against both bacterial strains, tested. The MIC values obtained from plants exhibited antibacterial activity ranged between 0.0625 and 0.25 mg/μL. The lowest MIC values were given by the ethanol extracts. Thus, the ethanol extract of this plant leaf sample was the most effective extract, which exhibited strong antimicrobial activity on both bacterial strains. Presence of bioactive compounds in these plant extracts could be the reason to indicate high antibacterial activity.","PeriodicalId":9894,"journal":{"name":"Ceylon Journal of Science","volume":"62 8","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-01-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139527014","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

First report of Curvularia dactylocteniicola causing leaf spots on Zea mays and Sorghum in Sri Lanka 斯里兰卡首次报告 Curvularia dactylocteniicola 在玉米和高粱上引起叶斑病

Ceylon Journal of Science Pub Date : 2024-01-17 DOI: 10.4038/cjs.v53i1.8315

H. S. Ferdinandez, D. Manamgoda, D. Udayanga

引用次数: 0

Quality of life among individuals working from home during COVID-19 pandemic - a cross sectional study from United States of America, Canada, India and Sri Lanka COVID-19 大流行期间在家工作的人的生活质量--来自美国、加拿大、印度和斯里兰卡的横断面研究

Ceylon Journal of Science Pub Date : 2024-01-04 DOI: 10.4038/cjs.v53i1.8170

Rogina J. S. Savarimuthu, C. Kanniammal, N. B. Devi

引用次数: 0

In-Vitro antioxidant activity of essential oils and oleoresins of cinnamon, clove bud, ginger and their synergistic interactions 肉桂、丁香芽、生姜精油和卵磷脂的体外抗氧化活性及其协同作用

Ceylon Journal of Science Pub Date : 2024-01-01 DOI: 10.4038/cjs.v53i1.8019

S. M. M. C. Sethunga, K. Ranaweera, I. Munaweera, K. Gunathilake

{"title":"In-Vitro antioxidant activity of essential oils and oleoresins of cinnamon, clove bud, ginger and their synergistic interactions","authors":"S. M. M. C. Sethunga, K. Ranaweera, I. Munaweera, K. Gunathilake","doi":"10.4038/cjs.v53i1.8019","DOIUrl":"https://doi.org/10.4038/cjs.v53i1.8019","url":null,"abstract":"Essential oils (EOs) and oleoresins (ORs) are well distinguished for their antioxidant properties and they can be widely used in the food industry as preservatives. The present study was executed for evaluating the synergistic interactions on antioxidant efficacy of EOs and ORs of cinnamon, clove bud and ginger and their combinations. EOs and ORs were obtained by hydro-distillation and solvent extraction. In-vitro antioxidant properties were investigated by DPPH free radical scavenging assay, phosphomolybdenum method (Total Antioxidant Capacity, TAC) and ABTS radical scavenging activity assay. EOs and ORs which consisted with different chemical constituents and different Total Phenolic Content (TPC) and Total Flavanoid Content (TFC) exhibited a range of variation in the inhibition percentage of DPPH and IC50 values (0.1645-6.5181 mg/mL). The TAC of EOs and ORs was within the range of 0.27-3.94 mg AAE/mg. The ORs showed higher inhibition percentages and TAC compared to EOs of the same spice. This study revealed that clove buds contains higher antioxidant properties than cinnamon and ginger. Significant reductions in IC50 values were shown in EO blends compared to the ORs blends. The combination of cinnamon EO/clove bud EO and combination cinnamon EO/ginger EO showed strong synergy in tested samples. Therefore, both EOs and ORs of Cinnamomum zeylanicum, Syzygium aromaticum, Zingiber officinale and their blends are excellent sources for natural and effective natural antioxidant agents in the food industry.","PeriodicalId":9894,"journal":{"name":"Ceylon Journal of Science","volume":" 4","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139392372","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