A. T. Oktaviana, Dimas Prayogo, Muhammad Naufal Ramadhan, Rahmatul Afiva, Zakiyatun Nisa, Agnes S Lubis, Olivia T Cahayaputri, Muhammad Redo Ramadhan
To obtain high-quality images using SPECT (Single Photon Computed Emission Tomography) imaging, quality control (QC) is required. QC is periodically conducted on SPECT based on standard protocol. Ring artifact are one of the factors in determining optimal image quality. Uniformity is a parameter that determines the ring artifact on SPECT image, which can be appeared as full-ring or half-ring. Those artifacts were generated since one or more PMT (photomultiplier tubes) were malfunctioning. A copper sheet with size of 2 × 2 cm2 and 1 mm thick, attached to LEHR (Low Energy High Resolution) collimator in coordinates (x,y) depending on COR (Center of Rotation) of the gamma camera, was used to generate ring artifact during image acquisition using radioisotope 99
{"title":"Ring Artifact on SPECT Image due to Arbitrary Position of PMT Malfunction","authors":"A. T. Oktaviana, Dimas Prayogo, Muhammad Naufal Ramadhan, Rahmatul Afiva, Zakiyatun Nisa, Agnes S Lubis, Olivia T Cahayaputri, Muhammad Redo Ramadhan","doi":"10.18502/kls.v8i1.15387","DOIUrl":"https://doi.org/10.18502/kls.v8i1.15387","url":null,"abstract":"To obtain high-quality images using SPECT (Single Photon Computed Emission Tomography) imaging, quality control (QC) is required. QC is periodically conducted on SPECT based on standard protocol. Ring artifact are one of the factors in determining optimal image quality. Uniformity is a parameter that determines the ring artifact on SPECT image, which can be appeared as full-ring or half-ring. Those artifacts were generated since one or more PMT (photomultiplier tubes) were malfunctioning. A copper sheet with size of 2 × 2 cm2 and 1 mm thick, attached to LEHR (Low Energy High Resolution) collimator in coordinates (x,y) depending on COR (Center of Rotation) of the gamma camera, was used to generate ring artifact during image acquisition using radioisotope 99","PeriodicalId":17898,"journal":{"name":"KnE Life Sciences","volume":"7 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-03-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140374227","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}
D. S. Yudha, R. Eprilurahman, Hendy Eka Putra, Sheliana Nugraha Muslim, Rachmat Aditama Dwija Putra
A reptile is a group of animal consists of testudines, crocodiles, lizards, and snakes. Most reptiles are capable of occupying wide range of habitats with different environmental conditions. One of the preferred habitats for reptiles is a river. Boyong-Code River is one of the rivers that flow across the Province of Daerah Istimewa Yogyakarta (DIY). Research on the diversity of lizards and snakes in the Boyong-Code River has been done in 2012. This research aims to acquire new data on the diversity of herpetofauna in the Boyong-Code River and compare it with 2012 data research. The comparison purpose is to monitor the species diversity dynamics after 5 years. The data of herpetofauna diversity were acquired using a combination of several methods, i.e., VES (Visual Encounter Survey), riverbank cruising, and transect. Sampling areas in 2012 and 2017 were divided into three locations, i.e., upstream, midstream, and downstream. Species diversity of lizards and snakes in the Boyong-Code River in 2017 consists of eight species of lizards (lacertilians: squamates: reptiles) and four species of snakes (serpents: squamates: reptiles). Species diversity dynamics were equal for lizards in 2012 and 2017; meanwhile, there were more species of snakes in 2012 compared to 2017. Keywords: monitoring, diversity, lizards, snakes, reptiles, squamates, boyong-code river, Daerah Istimewa Yogyakarta
{"title":"Monitoring the Diversity of Lizards and Snakes (Reptilia: Squamata), Along the Boyong-Code River Area, Province of Daerah Istimewa Yogyakarta","authors":"D. S. Yudha, R. Eprilurahman, Hendy Eka Putra, Sheliana Nugraha Muslim, Rachmat Aditama Dwija Putra","doi":"10.18502/kls.v8i1.15508","DOIUrl":"https://doi.org/10.18502/kls.v8i1.15508","url":null,"abstract":"A reptile is a group of animal consists of testudines, crocodiles, lizards, and snakes. Most reptiles are capable of occupying wide range of habitats with different environmental conditions. One of the preferred habitats for reptiles is a river. Boyong-Code River is one of the rivers that flow across the Province of Daerah Istimewa Yogyakarta (DIY). Research on the diversity of lizards and snakes in the Boyong-Code River has been done in 2012. This research aims to acquire new data on the diversity of herpetofauna in the Boyong-Code River and compare it with 2012 data research. The comparison purpose is to monitor the species diversity dynamics after 5 years. The data of herpetofauna diversity were acquired using a combination of several methods, i.e., VES (Visual Encounter Survey), riverbank cruising, and transect. Sampling areas in 2012 and 2017 were divided into three locations, i.e., upstream, midstream, and downstream. Species diversity of lizards and snakes in the Boyong-Code River in 2017 consists of eight species of lizards (lacertilians: squamates: reptiles) and four species of snakes (serpents: squamates: reptiles). Species diversity dynamics were equal for lizards in 2012 and 2017; meanwhile, there were more species of snakes in 2012 compared to 2017. \u0000Keywords: monitoring, diversity, lizards, snakes, reptiles, squamates, boyong-code river, Daerah Istimewa Yogyakarta","PeriodicalId":17898,"journal":{"name":"KnE Life Sciences","volume":"33 4","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-03-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140375512","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}
. Agustina, Muhamad Taufik Ulhakim, A. Setiawan, D. G. Syarif, E. Suhendi
Recently, there have been many researchers who discussed screen printing techniques (SPT) as a good approach to fabricate the thick films for gas sensor applications. In this work, the SPTs were conducted to fabricate the thick films based on gadolinium oxide-doped Fe2O3-LaFeO3-La2O3 that were applied as ethanol gas sensors. The crystal and morphological structures were investigated using x-ray diffraction and scanning electron microscopy, respectively. It shows that there are three phases of the crystal structure of gadolinium oxide-doped Fe2O3-LaFeO3-La2O3 i.e., rhombohedral, orthorhombic, and hexagonal. The morphological structure shows an average particle size of about 0.61 μm. Furthermore, the electrical properties measurements were explored to ensure the performance of thick films in detecting the ethanol gases. Th measurements were conducted in the range of temperature of about 310 ∘C to 325 ∘C and in the various ethanol gas containing, it is 0 ppm, 100 ppm, 200 ppm, and 300 ppm. This result showed that the highest response of thick films in the existence of ethanol gases (300 ppm) is 427 with an optimum temperature of 319 ∘C. It is also confirmed that SPT has an excellent approach in thick film fabrication to produce gas sensor devices with good performance. Keywords: fabrication, gadolinium oxide, doped, thick films, screen printing, electrical properties, ethanol, sensors
{"title":"Fabrication of Gadolinium Oxide-doped Fe2O3-LaFeO3-La2O3 Thick Films by Screen Printing Technique and Their Electrical Properties for Ethanol Gas Sensors","authors":". Agustina, Muhamad Taufik Ulhakim, A. Setiawan, D. G. Syarif, E. Suhendi","doi":"10.18502/kls.v8i1.15393","DOIUrl":"https://doi.org/10.18502/kls.v8i1.15393","url":null,"abstract":"Recently, there have been many researchers who discussed screen printing techniques (SPT) as a good approach to fabricate the thick films for gas sensor applications. In this work, the SPTs were conducted to fabricate the thick films based on gadolinium oxide-doped Fe2O3-LaFeO3-La2O3 that were applied as ethanol gas sensors. The crystal and morphological structures were investigated using x-ray diffraction and scanning electron microscopy, respectively. It shows that there are three phases of the crystal structure of gadolinium oxide-doped Fe2O3-LaFeO3-La2O3 i.e., rhombohedral, orthorhombic, and hexagonal. The morphological structure shows an average particle size of about 0.61 μm. Furthermore, the electrical properties measurements were explored to ensure the performance of thick films in detecting the ethanol gases. Th measurements were conducted in the range of temperature of about 310 ∘C to 325 ∘C and in the various ethanol gas containing, it is 0 ppm, 100 ppm, 200 ppm, and 300 ppm. This result showed that the highest response of thick films in the existence of ethanol gases (300 ppm) is 427 with an optimum temperature of 319 ∘C. It is also confirmed that SPT has an excellent approach in thick film fabrication to produce gas sensor devices with good performance. \u0000Keywords: fabrication, gadolinium oxide, doped, thick films, screen printing, electrical properties, ethanol, sensors","PeriodicalId":17898,"journal":{"name":"KnE Life Sciences","volume":"64 10","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-03-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140376575","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}
Gizella Mentari Putri, Endi Suhend, Muhamad Taufik Ulhakim, A. Setiawan, D. G. Syarif
Herein, electrical properties of ethanol gas sensing based on Gd- and Mn- doped Fe2O3-LaFeO3-La2O3 thick films were investigated. The Gd- and Mn-doped Fe2O3- LaFeO3-La2O3 were synthesized by coprecipitation method and formed to thick films using screen-printing techniques with sintering temperature at 900 ∘C. X-ray diffraction and scanning electron microscopy were conducted to determine the crystal and morphological structures. The results showed that the synthesized materials have three phases i.e., tetragonal, cubic, and hexagonal, respectively for Fe2O3-LaFeO3-La2O3. Also, the average particle size is of about 0.51 μm. Among all those circumstances, synthesized materials indicate good performances as ethanol gas sensing that showed in the electrical properties’ measurement. It tested A differently in ethanol containing i.e., 0 ppm, 100 ppm, 200 ppm, and 300 ppm. The highest response to ethanol gases reached at 300 ppm, it is 332 with optimum temperature at 289∘C. We hope our findings could be beneficial and helpful in the perfect fabrication of ethanol gas sensors in future. Keywords: electrical properties, thick films, doped, ethanol, sensors
{"title":"Electrical Properties of Gd- and Mn-Doped Fe2O3-LaFeO3- La2O3 Thick Films for Ethanol Gas Sensors","authors":"Gizella Mentari Putri, Endi Suhend, Muhamad Taufik Ulhakim, A. Setiawan, D. G. Syarif","doi":"10.18502/kls.v8i1.15390","DOIUrl":"https://doi.org/10.18502/kls.v8i1.15390","url":null,"abstract":"Herein, electrical properties of ethanol gas sensing based on Gd- and Mn- doped Fe2O3-LaFeO3-La2O3 thick films were investigated. The Gd- and Mn-doped Fe2O3- LaFeO3-La2O3 were synthesized by coprecipitation method and formed to thick films using screen-printing techniques with sintering temperature at 900 ∘C. X-ray diffraction and scanning electron microscopy were conducted to determine the crystal and morphological structures. The results showed that the synthesized materials have three phases i.e., tetragonal, cubic, and hexagonal, respectively for Fe2O3-LaFeO3-La2O3. Also, the average particle size is of about 0.51 μm. Among all those circumstances, synthesized materials indicate good performances as ethanol gas sensing that showed in the electrical properties’ measurement. It tested A differently in ethanol containing i.e., 0 ppm, 100 ppm, 200 ppm, and 300 ppm. The highest response to ethanol gases reached at 300 ppm, it is 332 with optimum temperature at 289∘C. We hope our findings could be beneficial and helpful in the perfect fabrication of ethanol gas sensors in future. \u0000Keywords: electrical properties, thick films, doped, ethanol, sensors","PeriodicalId":17898,"journal":{"name":"KnE Life Sciences","volume":"14 2","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-03-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140377520","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}
H. Muflihah, S. B. Rahiman, H. S. Sastramihardja, F. A. Yulianto
Pro-calcitonin and D-dimer are among predictive biomarkers for the severity and mortality of COVID-19. The application of these parameters in the clinical setting of Indonesian hospitals is less documented. This study aims to evaluate the association between procalcitonin and D-dimer with COVID-19. This research is part of a retrospective study evaluating 249 hospitalized COVID-19 patients in Bandung, Indonesia. Patients who were positive for procalcitonin or D-dimer were selected. Clinical data of age, sex, comorbid condition, peripheral oxygen saturation (SpO2), and death were assessed. There were 39 and 28 patients tested for procalcitonin and D-dimer respectively. The level of procalcitonin was not associate with the severity of COVID-19 (p=0.442), death (p=0.506), comorbid condition (p=0.601) or the use of the antibiotics. However, the level of D-dimer in patients with severe COVID-19 was significantly higher than those with non-severe COVID-19 (p=0.0468). Our study shows that procalcitonin levels are not associated with COVID-19. However, D-dimer is associated with the severity of COVID-19. Keywords: COVID-19, D-dimer, procalcitonin, severity
降钙素原和d -二聚体是COVID-19严重程度和死亡率的预测性生物标志物。这些参数在印度尼西亚医院临床环境中的应用记录较少。本研究旨在评估降钙素原和d -二聚体与COVID-19的关系。这项研究是对印度尼西亚万隆249名住院的COVID-19患者进行回顾性研究的一部分。选择降钙素原或d -二聚体阳性的患者。评估年龄、性别、合并症、外周血血氧饱和度(SpO2)和死亡的临床资料。分别有39例和28例患者检测降钙素原和d -二聚体。降钙素原水平与COVID-19的严重程度(p=0.442)、死亡(p=0.506)、合病情况(p=0.601)或抗生素的使用无关。重症患者血清d -二聚体水平明显高于非重症患者(p=0.0468)。我们的研究表明降钙素原水平与COVID-19无关。然而，d -二聚体与COVID-19的严重程度有关。关键词:COVID-19, d -二聚体，降钙素原，严重程度
{"title":"Procalcitonin, but not D-dimer, is an Inapplicable Biomarker for Severe COVID-19","authors":"H. Muflihah, S. B. Rahiman, H. S. Sastramihardja, F. A. Yulianto","doi":"10.18502/kls.v7i5.12522","DOIUrl":"https://doi.org/10.18502/kls.v7i5.12522","url":null,"abstract":"Pro-calcitonin and D-dimer are among predictive biomarkers for the severity and mortality of COVID-19. The application of these parameters in the clinical setting of Indonesian hospitals is less documented. This study aims to evaluate the association between procalcitonin and D-dimer with COVID-19. This research is part of a retrospective study evaluating 249 hospitalized COVID-19 patients in Bandung, Indonesia. Patients who were positive for procalcitonin or D-dimer were selected. Clinical data of age, sex, comorbid condition, peripheral oxygen saturation (SpO2), and death were assessed. There were 39 and 28 patients tested for procalcitonin and D-dimer respectively. The level of procalcitonin was not associate with the severity of COVID-19 (p=0.442), death (p=0.506), comorbid condition (p=0.601) or the use of the antibiotics. However, the level of D-dimer in patients with severe COVID-19 was significantly higher than those with non-severe COVID-19 (p=0.0468). Our study shows that procalcitonin levels are not associated with COVID-19. However, D-dimer is associated with the severity of COVID-19. \u0000Keywords: COVID-19, D-dimer, procalcitonin, severity","PeriodicalId":17898,"journal":{"name":"KnE Life Sciences","volume":"171 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-12-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77029690","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}
S. Hazar, Esti Rahmawati Sadiyah, Reza A. Kodir, Lisma Herawati, Sagita G. Cahyadi, Laroyba T. Fauzi
Arabica coffee (Coffea arabica L.) planted in the Arjsari area has the quality of being a specialty coffee that has superior taste and quality. Post-harvest processing can affect the content of the compounds in coffee such that it will affect the quality of the coffee beans. The post-harvest process from coffee cherries to green coffee beans in a natural, semi-washed, and full-washed manner affects the physical form and taste quality of the coffee beans. This study aimed to determine the antioxidant properties of green coffee beans processed by three different post-harvest processes. The test was carried out in vitro using the DPPH (2,2-diphenyl-1-picryl-hydrazyl) method. Antioxidant activity can be seen from the IC50 value. Vitamin C with an IC50 value of 6.1899 ppm was used in comparison. The test results showed that the three ethanolic extracts of green coffee beans had very strong antioxidant properties when compared with the Vitamin C, with the IC50 values of natural, full-washed, and semi-washed ethanolic extract of green coffee beans, respectively being - 33.8648; 27.1245; and 26.9975 ppm. Keywords: antioxidant, arabica coffee, coffea arabica L. post-harvest process
{"title":"Antioxidant Properties of Coffee Arabica from the Arjasari District that is Processed Naturally, Semi-Washed and Full-Washed","authors":"S. Hazar, Esti Rahmawati Sadiyah, Reza A. Kodir, Lisma Herawati, Sagita G. Cahyadi, Laroyba T. Fauzi","doi":"10.18502/kls.v7i5.12515","DOIUrl":"https://doi.org/10.18502/kls.v7i5.12515","url":null,"abstract":"Arabica coffee (Coffea arabica L.) planted in the Arjsari area has the quality of being a specialty coffee that has superior taste and quality. Post-harvest processing can affect the content of the compounds in coffee such that it will affect the quality of the coffee beans. The post-harvest process from coffee cherries to green coffee beans in a natural, semi-washed, and full-washed manner affects the physical form and taste quality of the coffee beans. This study aimed to determine the antioxidant properties of green coffee beans processed by three different post-harvest processes. The test was carried out in vitro using the DPPH (2,2-diphenyl-1-picryl-hydrazyl) method. Antioxidant activity can be seen from the IC50 value. Vitamin C with an IC50 value of 6.1899 ppm was used in comparison. The test results showed that the three ethanolic extracts of green coffee beans had very strong antioxidant properties when compared with the Vitamin C, with the IC50 values of natural, full-washed, and semi-washed ethanolic extract of green coffee beans, respectively being - 33.8648; 27.1245; and 26.9975 ppm. \u0000Keywords: antioxidant, arabica coffee, coffea arabica L. post-harvest process","PeriodicalId":17898,"journal":{"name":"KnE Life Sciences","volume":"2006 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-12-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82573019","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}
Sani Ega Priani, Soia Neriani Budiman, Sri Peni Fitrianingsih, Livia Syafnir, Taufik Muhammad Fakih
Our previous study showed that cocoa pod husk extract has tyrosinase inhibitory properties and the potential to prevent skin hyperpigmentation. Another natural source that is known to have tyrosinase inhibitory properties is cinnamon bark oil. This paper aims to analyze the tyrosinase inhibitory properties of cinnamon bark oil through molecular docking. It also aims to determine the effect of adding cinnamon bark oil to the tyrosinase inhibitory properties of emulgel containing cocoa pod husk extract. The constituents of cinnamon bark oil were determined using gas chromatography-mass spectrometry. The molecular docking was conducted using autodock. The emulgels were prepared by adding 2% of cocoa pod husk extract with and without the addition of cinnamon bark oil (1%). Tyrosinase inhibitory properties were analyzed using a colorimetric enzymatic assay and the dopachrome method. The GCMS result showed the cinnamon bark oil containing 53.37% cinnamaldehyde. The in-silico study showed cinnamaldehyde properties as a tyrosinase inhibitor, since it can bind on the active site of the enzyme with free binding energy at -4.88 kcal/mol. The addition of cinnamon bark oil (1%) to the emulgel preparation increased the tyrosinase inhibitory activity by 63.33% based on in vitro study. Keywords: emulgel, cocoa pod husk extract, cinnamon bar oil, tyrosinase inhibitor
{"title":"The Effect of Adding Cinnamon Bark Oil to the Tyrosinase Inhibitory Activity of Emulgel Containing Cocoa Pod Husk Extract","authors":"Sani Ega Priani, Soia Neriani Budiman, Sri Peni Fitrianingsih, Livia Syafnir, Taufik Muhammad Fakih","doi":"10.18502/kls.v7i5.12513","DOIUrl":"https://doi.org/10.18502/kls.v7i5.12513","url":null,"abstract":"Our previous study showed that cocoa pod husk extract has tyrosinase inhibitory properties and the potential to prevent skin hyperpigmentation. Another natural source that is known to have tyrosinase inhibitory properties is cinnamon bark oil. This paper aims to analyze the tyrosinase inhibitory properties of cinnamon bark oil through molecular docking. It also aims to determine the effect of adding cinnamon bark oil to the tyrosinase inhibitory properties of emulgel containing cocoa pod husk extract. The constituents of cinnamon bark oil were determined using gas chromatography-mass spectrometry. The molecular docking was conducted using autodock. The emulgels were prepared by adding 2% of cocoa pod husk extract with and without the addition of cinnamon bark oil (1%). Tyrosinase inhibitory properties were analyzed using a colorimetric enzymatic assay and the dopachrome method. The GCMS result showed the cinnamon bark oil containing 53.37% cinnamaldehyde. The in-silico study showed cinnamaldehyde properties as a tyrosinase inhibitor, since it can bind on the active site of the enzyme with free binding energy at -4.88 kcal/mol. The addition of cinnamon bark oil (1%) to the emulgel preparation increased the tyrosinase inhibitory activity by 63.33% based on in vitro study. \u0000Keywords: emulgel, cocoa pod husk extract, cinnamon bar oil, tyrosinase inhibitor","PeriodicalId":17898,"journal":{"name":"KnE Life Sciences","volume":"13 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-12-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88118377","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}
A. F. Hidayat, R. Aryani, R. Choesrina, I. D. Novita, A. M. Devi
Candlenut has a lot of potential pharmacological benefits including in hair care, in treating skin problems such as psoriasis, and in its use as an emollient. However, the high unsaturated fatty acid content of candlenut oil causes it to be easily degraded by oxidation due to exposure to air, light, and humidity. Nanoencapsulations were found to be an alternative in protecting the materials from degradation. The purpose of this study was to investigate the effect of polymer-based nanoencapsulations on the oxidative stability of candlenut oil. Polyvinyl alcohol (PVA) was used as a polymer wall material. A lower peroxide value indicates better oil stability against oxidation. Results showed that nano-encapsulated candlenut oil has a significantly lower average peroxide value of 0.41 meq/100g over 35 days storage time, compared to 3.8 meq/100g in pure candlenut oil. Furthermore, based on its physical characterization, it was found that the reduction of particle size with the optimal size of 172±12 nm was achieved by increasing the amount of PVA. A well-chosen and well-calculated amount of polymer material, therefore, plays an important role to obtain optimal nano-encapsulated candlenut oil. Keywords: nanoencapsulation, candlenut oil, oxidative stability, polymeric materials
{"title":"Oxidative Stability of Nano-Encapsulated Candlenut Oil","authors":"A. F. Hidayat, R. Aryani, R. Choesrina, I. D. Novita, A. M. Devi","doi":"10.18502/kls.v7i5.12537","DOIUrl":"https://doi.org/10.18502/kls.v7i5.12537","url":null,"abstract":"Candlenut has a lot of potential pharmacological benefits including in hair care, in treating skin problems such as psoriasis, and in its use as an emollient. However, the high unsaturated fatty acid content of candlenut oil causes it to be easily degraded by oxidation due to exposure to air, light, and humidity. Nanoencapsulations were found to be an alternative in protecting the materials from degradation. The purpose of this study was to investigate the effect of polymer-based nanoencapsulations on the oxidative stability of candlenut oil. Polyvinyl alcohol (PVA) was used as a polymer wall material. A lower peroxide value indicates better oil stability against oxidation. Results showed that nano-encapsulated candlenut oil has a significantly lower average peroxide value of 0.41 meq/100g over 35 days storage time, compared to 3.8 meq/100g in pure candlenut oil. Furthermore, based on its physical characterization, it was found that the reduction of particle size with the optimal size of 172±12 nm was achieved by increasing the amount of PVA. A well-chosen and well-calculated amount of polymer material, therefore, plays an important role to obtain optimal nano-encapsulated candlenut oil. \u0000Keywords: nanoencapsulation, candlenut oil, oxidative stability, polymeric materials","PeriodicalId":17898,"journal":{"name":"KnE Life Sciences","volume":"71 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-12-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89079603","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}
N. Kurniaty, L. Wachidah, Teti Sofia Yanti, Yani Krishnamurti, Novianti Dwi Puji Astuti, Eti Kurniati, A. Firdaus, Muhamad Nurhikmat Zain, Andi Setia Nugraha
Dayeuhkolot Village, in the Sagalaherang Sub-district, Subang District, West Java Province, is striving to become an ecotourism area. One of the products that was intended to be preserved was palm sugar. However, palm trees (Arenga Pinnata) are no longer available in the village. Apart from having economic value, palm trees are important as they are a buffer for the soil since their roots can prevent landslides, which frequently occur at the village during the rainy season. The training program that we implemented to overcome these problems wass the preservation and planting of palm trees. In addition to the training, we also provided 150 palm seeds. To determine the success of tree planting, the team measured the height of the palm trees every month. The results showed that the average growth is 10%. Keywords: conservation, planting, aren trees
{"title":"Training for the Conservation and Planting of Aren Trees in the Dayeuhkolot Village, Sagalaherang Sub- District","authors":"N. Kurniaty, L. Wachidah, Teti Sofia Yanti, Yani Krishnamurti, Novianti Dwi Puji Astuti, Eti Kurniati, A. Firdaus, Muhamad Nurhikmat Zain, Andi Setia Nugraha","doi":"10.18502/kls.v7i5.12523","DOIUrl":"https://doi.org/10.18502/kls.v7i5.12523","url":null,"abstract":"Dayeuhkolot Village, in the Sagalaherang Sub-district, Subang District, West Java Province, is striving to become an ecotourism area. One of the products that was intended to be preserved was palm sugar. However, palm trees (Arenga Pinnata) are no longer available in the village. Apart from having economic value, palm trees are important as they are a buffer for the soil since their roots can prevent landslides, which frequently occur at the village during the rainy season. The training program that we implemented to overcome these problems wass the preservation and planting of palm trees. In addition to the training, we also provided 150 palm seeds. To determine the success of tree planting, the team measured the height of the palm trees every month. The results showed that the average growth is 10%. \u0000Keywords: conservation, planting, aren trees","PeriodicalId":17898,"journal":{"name":"KnE Life Sciences","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-12-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90231728","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}
Gina Puspitasari Rochman, Afiati ., E. Syaodih, Riswandha Risang Aji
but no one has examined specifics based on the type/specificity of persons with disabilities. This study compares the accessibility of tourism for people with hearing, blind, and physical disabilities based on their needs and experiences. This study uses a qualitative-comparative approach with content qualitative analysis. Interviews were conducted with key informants, namely people with deaf, blind, and physical disabilities who have experience traveling in the city of Bandung and its surroundings. Based on the results of the analysis, this study concluded that the deaf have greater access to tourism attractions than the blind. The availability of guides or assistants affects the accessibility of tourism for the blind, the availability of infrastructure or visual media affects the accessibility of tourism for the deaf, and the availability of physical infrastructure affects the accessibility of tourism for the physically disabled. This affects the opportunities for persons with disabilities to have attractive and comfortable travel experiences known as friendly tourism. This study recommends improving the accessibility to tourism for persons with disabilities by focusing on improving main services and infrastructure according to the needs of those with the disability. Keywords: disabilities, friendly tourism, accessibility, infrastructure
{"title":"How Accessible is Tourism for People With Disabilities?","authors":"Gina Puspitasari Rochman, Afiati ., E. Syaodih, Riswandha Risang Aji","doi":"10.18502/kls.v7i5.12528","DOIUrl":"https://doi.org/10.18502/kls.v7i5.12528","url":null,"abstract":"but no one has examined specifics based on the type/specificity of persons with disabilities. This study compares the accessibility of tourism for people with hearing, blind, and physical disabilities based on their needs and experiences. This study uses a qualitative-comparative approach with content qualitative analysis. Interviews were conducted with key informants, namely people with deaf, blind, and physical disabilities who have experience traveling in the city of Bandung and its surroundings. Based on the results of the analysis, this study concluded that the deaf have greater access to tourism attractions than the blind. The availability of guides or assistants affects the accessibility of tourism for the blind, the availability of infrastructure or visual media affects the accessibility of tourism for the deaf, and the availability of physical infrastructure affects the accessibility of tourism for the physically disabled. This affects the opportunities for persons with disabilities to have attractive and comfortable travel experiences known as friendly tourism. This study recommends improving the accessibility to tourism for persons with disabilities by focusing on improving main services and infrastructure according to the needs of those with the disability. \u0000Keywords: disabilities, friendly tourism, accessibility, infrastructure","PeriodicalId":17898,"journal":{"name":"KnE Life Sciences","volume":"13 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-12-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90719222","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}
京公网安备 11010802042870号
京ICP备2023020795号-1
扫码关注我们
求助内容：
应助结果提醒方式：