Journal of Symbolic Logic最新文献_第6页

Antimicrobial Activity of Ten Extractives from Toba, North Sumatra and Mt. Merapi National Park Regions, Indonesia 印尼北苏门答腊岛多巴和默拉皮山国家公园10种提取物的抗菌活性研究

IF 0.6 3区数学

Journal of Symbolic Logic Pub Date : 2021-01-29 DOI: 10.23960/JSL1976-85

M. Ismayati, D. Zulfiana, S. Himmi, D. Tarmadi, D. Meisyara, A. Zulfitri, T. Kartika

{"title":"Antimicrobial Activity of Ten Extractives from Toba, North Sumatra and Mt. Merapi National Park Regions, Indonesia","authors":"M. Ismayati, D. Zulfiana, S. Himmi, D. Tarmadi, D. Meisyara, A. Zulfitri, T. Kartika","doi":"10.23960/JSL1976-85","DOIUrl":"https://doi.org/10.23960/JSL1976-85","url":null,"abstract":"Investigating beneficial chemical compounds of plant extracts is one of the ways to prevent biodiversity loss. This study evaluated the antimicrobial activity of indigenous plant extracts from Toba , North Sumatra, and Mt. Merapi National Park regions against Escherichia coli , Bacillus subtilis , Salmone l la typ h i , Staphylococcus aureus , Candida albicans , and Candida tropicalis by calculating the zone of microbial growth inhibition. Among the plant extracts, T 5 that identified as Toona sinensis showed the highest microbial inhibit ion to the growth of C. albicans , B. subtilis , S. typhi, and E. coli with the diameter growth of approximately 2.00, 1.80, 1.33, and 1.33 cm, respectively. Based on those results, T. sinensis was then subsequently fractionated using n-hexane, ethyl acetate, and methanol , respectively. The resulted fractions also were evaluated for antimicrobial bioassay. A ll fractions have shown activity in inhibiting the growth of the microbes at 1% concentration. However, each fraction show ed growth inhibition against certain microbe s . The n-hexane fraction show ed the greatest inhibitory activity for E. coli and S. typhi ; ethyl acetate fraction for B. subtilis and C. albicans ; and methanol fraction for E. coli and S. typhi . The results revealed that T. sinensis plant extract has great potential as an antimicrobial agent . Further investigation is needed to observe the mode of anti microbial action of fractionated crude extracts of T . Sinensis . The exploring potency of Indonesian biodiversity opened up a new way for the utilization of plants for economic development and conservation . Keywords: antimicrobial plants, indigenous knowledge, Toba-North Sumatra, Mt. Merapi","PeriodicalId":17088,"journal":{"name":"Journal of Symbolic Logic","volume":"1 1","pages":"76-85"},"PeriodicalIF":0.6,"publicationDate":"2021-01-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86420826","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"数学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Produksi dan Laju Dekomposisi Serasah Ceriops tagal di Cagar Alam Tanjung Panjang (The Production and Decomposition Rate of Ceriops tagal Litter in Tanjung Panjang Nature Reserve)

IF 0.6 3区数学

Journal of Symbolic Logic Pub Date : 2021-01-29 DOI: 10.23960/JSL19151-160

Mirawati Thalib, D. Baderan, Abubakar Sidik Katili

{"title":"Produksi dan Laju Dekomposisi Serasah Ceriops tagal di Cagar Alam Tanjung Panjang (The Production and Decomposition Rate of Ceriops tagal Litter in Tanjung Panjang Nature Reserve)","authors":"Mirawati Thalib, D. Baderan, Abubakar Sidik Katili","doi":"10.23960/JSL19151-160","DOIUrl":"https://doi.org/10.23960/JSL19151-160","url":null,"abstract":"Mangrove vegetation grow s along the coastal line and is capable of thriving in salt y water . Therefore, the study reported in this article sought to describe the production and decomposition rate of Ceriops tagal litter in Tanjung Panjang N ature R eserve in Randangan Sub-District, Pohuwato District , Gorontalo Province . A survey method was employed, and a purposive sampling technique was used for selecting the research site. The data of litter production was collected using a litter trap of 2 m x 1 m . D ecomposition data was collected using a litter bag sized of 1 m x 1 m. The results showed that litter production containing leaves at Station I reached 46%, twigs 40%, and fruits 14%. At Station II, the production of litter containing leaves reached 42%, twigs 45%, and fruits 13%. At Station III, the production of litter containing leaves reached 48%, twigs 43%, and fruits 9%. The decomposition rate (R) of C. tagal litter at each station was obtained with an average on the 14th day of 0.42 g, 0.75 g, and 0.77 g, respectively. On the 28 th day, it was 0.75 g, 1.00 g, and 0.89 g; on the 42 nd day was 1.13 g, 1.27 g, and 1.22 g; and on the 56 th day was 1.48 g, 1.62 g, and 1.59 g. The ratio of the decomposition rate of C. tagal litter on day 14 to day 56 increased. This condition was influenced by several environmental factors, including salinity, which ranged from 4.5-6.3 ‰ , ambient temperature at 27-28 ° C, dissolved oxygen at 2.0-5.0 mg/L, and soil pH between 5.9-8.0 . Keywords: Ceriops tagal , decomposition rate, litter production, Pohuwato","PeriodicalId":17088,"journal":{"name":"Journal of Symbolic Logic","volume":"15 1","pages":"151-160"},"PeriodicalIF":0.6,"publicationDate":"2021-01-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84552653","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"数学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 5

Household Livelihood Strategy Based on Capital Assets in Fire-Prone Areas, Ogan Komering Ilir Regency, South Sumatra 基于火灾易发地区资本资产的家庭生计策略，南苏门答腊岛Ogan Komering Ilir Regency

IF 0.6 3区数学

Journal of Symbolic Logic Pub Date : 2021-01-29 DOI: 10.23960/JSL1945-63

A. Nurlia, D. Purnama, S. Kadir

{"title":"Household Livelihood Strategy Based on Capital Assets in Fire-Prone Areas, Ogan Komering Ilir Regency, South Sumatra","authors":"A. Nurlia, D. Purnama, S. Kadir","doi":"10.23960/JSL1945-63","DOIUrl":"https://doi.org/10.23960/JSL1945-63","url":null,"abstract":"Forest and land fires are problem s that ha ve not been resolved and occur almost every year. Various policies related to forest and land fires began to be promoted nationally and have restricted communities in managing their land. This causes a vulnerability in society. Farmers are required to carry out various methods and strategies to overcome economic problems. This research aims to analyze the livelihood assets and livelihood strategies of farmer households. The study was conducted from February to June 2020 in Pulu Beruang Village, Tulung Selapan Sub-District, and Kayu Labu Village, Pedamaran Timur Sub-District, Ogan Komering Ilir Regency. This research is a survey research using a mixed sequential explanatory approach by using the triangulation principle. The quantitative data collection is done through a household survey using a questionnaire to 75 respondents in Pulu Beruang Village and 70 respondents in Kayu Labu Village. Qualitative data collection was carried out through in-depth interviews, Focus Group Discussions (FGD), and field observation. The results showed that Pulu Beruang Village had a greater asset score in human capital and financial capital. In comparison, Kayu L abu Village had a greater score in natural capital. Physical capital and social capital in both villages had scores that were not distinctly different . Hence, they did not have a different effect on community resilience. Livelihood assets owned by the community influence their household livelihood strategies. The household livelihood strategy in Pulu Beruang Village uses human capital and financial capital , agricultural sector and non-agriculture, especially trad ing , and swallow ’ s nest business. Meanwhile, the livelihood strategies of farmers ’ households in Kayu Labu Village rely on their natural capital and agricultural sectors , such as fisheries and purun crafts . Keywords: forest and land fires, livelihood asset, livelihood strategies","PeriodicalId":17088,"journal":{"name":"Journal of Symbolic Logic","volume":"62 1","pages":"45-63"},"PeriodicalIF":0.6,"publicationDate":"2021-01-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89652186","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"数学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 2

Penilaian Risiko Ergonomi dalam Kegiatan Pemungutan Getah Pinus: Analisis Postur Kerja Statis (Ergonomics Risk Assessment in Pine Resin Harvesting: A Static Postural Analysis)

IF 0.6 3区数学

Journal of Symbolic Logic Pub Date : 2021-01-29 DOI: 10.23960/JSL19104-120

E. Y. Yovi, Ahmad Fauzi

{"title":"Penilaian Risiko Ergonomi dalam Kegiatan Pemungutan Getah Pinus: Analisis Postur Kerja Statis (Ergonomics Risk Assessment in Pine Resin Harvesting: A Static Postural Analysis)","authors":"E. Y. Yovi, Ahmad Fauzi","doi":"10.23960/JSL19104-120","DOIUrl":"https://doi.org/10.23960/JSL19104-120","url":null,"abstract":"Pine resin is one of the non - timber forest products commodity that has excellent prospects. Pine resin harvesting is generally divided into two main activities: tapping and collecting works . Collecting activit y that is commonly done under manual technique is classified as manual material handling that can trigger musculoskeletal disorders (MSDs). This work posture study offers an overview of MSDs disruption level faced by workers. Therefore, the proper corrective action can be taken. Motion sequences in selected work cycles were captured by using the Kinovea software. Work posture analysis was performed by a combination of the natural range of motion (SAG), Rapid Upper-Limb Assessment (RULA), and Rapid Entire Body Assessment (REBA). SAG analysis shows that the body ’ s parts having a high probability of being injured are the back and shoulders. Work posture analysis using RULA and REBA verified that bending or half bending may cause MSDs. The ergonomics risk in these positions might be higher due to the influence of load and repetitive factors. Reducing the posture of bending/half bending, reducing the weight of the resin bucket, and taking a short break /rest in between work activities should be considered as potential strategies in reducing the ergonomics risks that may occur during the resin collection work . Keywords: forestry workers, musculoskeletal disorders, non-timber forest products, oleoresin, natural range of motion","PeriodicalId":17088,"journal":{"name":"Journal of Symbolic Logic","volume":"659 1","pages":"104-120"},"PeriodicalIF":0.6,"publicationDate":"2021-01-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76844262","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"数学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 2

Lignin as an Active Biomaterial: A Review 木质素作为活性生物材料的研究进展

IF 0.6 3区数学

Journal of Symbolic Logic Pub Date : 2021-01-29 DOI: 10.23960/JSL191-22

N. N. Solihat, F. P. Sari, F. Falah, M. Ismayati, M. A. R. Lubis, W. Fatriasari, E. Santoso, W. Syafii

引用次数: 34

Characterization and Potential of Coelogyne rochussenii Orchids from Bukit Rimbang and Bukit Baling Wildlife Sanctuary as Explant Source 武吉莲邦和武吉巴陵野生动物保护区玉兰外植源的鉴定与潜力

IF 0.6 3区数学

Journal of Symbolic Logic Pub Date : 2021-01-29 DOI: 10.23960/JSL1964-75

Pebra Heriansyah, Gusti Marlina

引用次数: 2

Dampak Jangka Pendek Penjarangan Hutan Campuran terhadap Keanekaragaman Serangga Terbang di KPH Banten (Short-Term Impact of Thinning of Mixed Forest on the Diversity of Flying Insects in Forest Management Unit of Banten)

IF 0.6 3区数学

Journal of Symbolic Logic Pub Date : 2021-01-29 DOI: 10.23960/JSL19138-150

A. Budiaman, N. F. Haneda, Sarah Nova Irene Lumbantobing

{"title":"Dampak Jangka Pendek Penjarangan Hutan Campuran terhadap Keanekaragaman Serangga Terbang di KPH Banten (Short-Term Impact of Thinning of Mixed Forest on the Diversity of Flying Insects in Forest Management Unit of Banten)","authors":"A. Budiaman, N. F. Haneda, Sarah Nova Irene Lumbantobing","doi":"10.23960/JSL19138-150","DOIUrl":"https://doi.org/10.23960/JSL19138-150","url":null,"abstract":"Forest thinning is a sylvicultural practice that aims to provide better growth space for increasing tree growth and stand quality. Forest thinning is a form of forest disturbance that has an impact on the forest environment, including flying insects . This study aim ed to assess the impact of thinning of mixed forest stands on the diversity of flying insect s . Eight circular plots of 0.1 ha were laid out systematically on thinning plots of 15.3 ha. Parameters observed in the plot included environment factors (stand composition, temperature, humidity, and canopy cover), abundance, species composition, and biodiversity index of flying insects (diversity index, species richness index, evenness index, and similarity index). The sweep net was used to collect the flying insects . Mann-Whitney test was used to compare the index of bio diversity of flying insects before and after forest thinning. Forest thinning caused a decrease in abundance , species composition , diversity index, richness index, and evenness index of flying insects. Forest thinning led to a decrease in the abundance of herbivorous flying insect s and an increase in the abundance of predatory flying insects . Flying insect species found before thinning was not identical to those after thinning. Keywords: diversity index, flying insect, forest ecosystem, forest tending","PeriodicalId":17088,"journal":{"name":"Journal of Symbolic Logic","volume":"71 1","pages":"138-150"},"PeriodicalIF":0.6,"publicationDate":"2021-01-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86349989","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"数学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Tree Health Management Strategy in Cianjur Urban Forest 钱汝尔城市森林树木健康管理策略

IF 0.6 3区数学

Journal of Symbolic Logic Pub Date : 2021-01-29 DOI: 10.23960/JSL1986-103

Religiana Salsabila, H. Hariyadi, N. Santoso

{"title":"Tree Health Management Strategy in Cianjur Urban Forest","authors":"Religiana Salsabila, H. Hariyadi, N. Santoso","doi":"10.23960/JSL1986-103","DOIUrl":"https://doi.org/10.23960/JSL1986-103","url":null,"abstract":"Urban forests have a high intensity of exposure from external factors such as air pollution and human activity disturbances. As a result, fallen trees and tree defects often occurred and can endanger the people around the city. This study aimed to assess tree health in Cianjur Urban Forest and formulate tree health management strategies. The tree health assessment used the Forest Health Monitoring (FHM) method. The management strategy was formulated using the Strengths, Weaknesses, Opportunities, and Threats (SWOT) Matrix and Quantitative Strategic Planning Matrix (QSPM). Tree sampling using FHM plots determined about 534 trees from 30 species. The results showed that Cianjur Urban Forest had high land productivity and biodiversity. The canopy condition was 86.41% in good condition. The results revealed that 92.70%, 5.34%, 1.31%, and 0.56% of the trees were in healthy, lightly, moderately, and heavily damaged conditions, respectively. The tree species that suffered the most damage was Acacia denticulosa . The most types of tree damage were leaf damage and rotten wood. Cianjur Urban Forest benefits the community as a place for natural tourism, sports, education, and expand job opportunities. However, the management of Cianjur Urban Forest has not been implemented effectively. There are three priority strategies to improve tree health management in Cianjur Urban Forest, i.e., conducting the assessment, evaluation, and action on damaged trees, community cooperation, institutional strengthening development programs, and optimizing collaboration and government commitment with managers. Keywords: Forest Health Monitoring, SWOT analysis, QSPM matrix, urban forest","PeriodicalId":17088,"journal":{"name":"Journal of Symbolic Logic","volume":"21 1","pages":"86-103"},"PeriodicalIF":0.6,"publicationDate":"2021-01-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90163680","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"数学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 5

Formation of Kyrgyz verbs derived from Russian stems 源于俄语词根的吉尔吉斯语动词的形成

IF 0.6 3区数学

Journal of Symbolic Logic Pub Date : 2020-10-31 DOI: 10.30530/jsl.2020.10.25.2.153

Dakieva Elvira, K. Chung

引用次数: 0

An acoustic study of Russian affricated dental plosive /t’/ 俄语咬合爆破音/t ' /的声学研究

IF 0.6 3区数学

Journal of Symbolic Logic Pub Date : 2020-10-31 DOI: 10.30530/jsl.2020.10.25.2.69

S. Lee, Yong-Kwon Lee

引用次数: 0