Pub Date : 2018-06-01DOI: 10.18052/WWW.SCIPRESS.COM/ILNS.69.1
N. Hassan, M. K. Hasan, Md. Obaidullah Shaddam, M. Islam, C. Barutçular, Ayman El Sabagh
A pot experiment was carried out at the Laboratory of Department of Agronomy, Hajee Mohamad Danesh Science and Technology University (HSTU), Bangladesh during 2016 to evaluate the response of maize varieties at germination and seedling growth stages under salt stress. The seeds of the BARI (Bangladesh Agricultural Research Institute) developed four maize varietiesviz.Barnali, Khoi Vutta, Mohor and BARI Maize 5 were placed in plastic pots (each of 25 cm length and 12 cm width) on sand bed irrigated with tap water (control), 100 and 200 mM NaCl salt solutions. It was replicated in thrice with completely randomized design (CRD). Salinity stress significantly affected the germination characters and seedling growth parameters of maize varieties. The germination percentages (GP) and germination rate (GR) reduced significantly with increasing salinity, and the variety Khoi Vutta showed the highest GP and GR followed by Barnali and Mohor showed the lowest GP and GR followed by BARI maize 5. Under high salinity level, seedling growths characteristics like shoot and root lengths, fresh and dry weight of shoot and roots reduced remarkably in the variety Mohor indicating salt susceptible while the minimum reduction of the aforementioned traits was observed in the variety Khoi Vutta demonstrating high salt tolerant variety. The studied varieties can be ranked on the basis of salt tolerance as Khoi Vutta > Barnali > BARI Maize 5 > Mohor from the experiment.
2016年，在孟加拉国哈吉·穆罕默德·达内什科技大学(HSTU)农学系实验室进行了盆栽试验，评估了不同玉米品种在萌发期和幼苗生长期对盐胁迫的响应。孟加拉国农业研究所(BARI)的种子培育出了四个玉米品种。将Barnali玉米、Khoi Vutta玉米、Mohor玉米和BARI玉米5号玉米分别放在砂床上的塑料盆中(每个盆长25 cm，宽12 cm)，分别用自来水(对照)、100和200 mM NaCl盐溶液灌溉。采用完全随机设计(CRD)重复试验3次。盐胁迫显著影响玉米品种的萌发特性和幼苗生长参数。随着盐度的升高，发芽率和发芽率显著降低，其中科伊乌塔的发芽率和发芽率最高，巴纳利次之，莫霍尔最低，BARI玉米5号次之。高盐胁迫下，盐敏感品种“莫霍尔”幼苗的茎、根长、茎、根鲜、干重等生长性状显著降低，而高耐盐品种“科伊武塔”的上述性状降低幅度最小。试验品种的耐盐性排序为:Khoi Vutta bb0 Barnali bb1 BARI Maize 5bb2 Mohor。
{"title":"Responses of Maize Varieties to Salt Stress in Relation to Germination and Seedling Growth","authors":"N. Hassan, M. K. Hasan, Md. Obaidullah Shaddam, M. Islam, C. Barutçular, Ayman El Sabagh","doi":"10.18052/WWW.SCIPRESS.COM/ILNS.69.1","DOIUrl":"https://doi.org/10.18052/WWW.SCIPRESS.COM/ILNS.69.1","url":null,"abstract":"A pot experiment was carried out at the Laboratory of Department of Agronomy, Hajee Mohamad Danesh Science and Technology University (HSTU), Bangladesh during 2016 to evaluate the response of maize varieties at germination and seedling growth stages under salt stress. The seeds of the BARI (Bangladesh Agricultural Research Institute) developed four maize varietiesviz.Barnali, Khoi Vutta, Mohor and BARI Maize 5 were placed in plastic pots (each of 25 cm length and 12 cm width) on sand bed irrigated with tap water (control), 100 and 200 mM NaCl salt solutions. It was replicated in thrice with completely randomized design (CRD). Salinity stress significantly affected the germination characters and seedling growth parameters of maize varieties. The germination percentages (GP) and germination rate (GR) reduced significantly with increasing salinity, and the variety Khoi Vutta showed the highest GP and GR followed by Barnali and Mohor showed the lowest GP and GR followed by BARI maize 5. Under high salinity level, seedling growths characteristics like shoot and root lengths, fresh and dry weight of shoot and roots reduced remarkably in the variety Mohor indicating salt susceptible while the minimum reduction of the aforementioned traits was observed in the variety Khoi Vutta demonstrating high salt tolerant variety. The studied varieties can be ranked on the basis of salt tolerance as Khoi Vutta > Barnali > BARI Maize 5 > Mohor from the experiment.","PeriodicalId":14407,"journal":{"name":"International Letters of Natural Sciences","volume":null,"pages":null},"PeriodicalIF":0.3,"publicationDate":"2018-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45443172","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}
Pub Date : 2018-06-01DOI: 10.18052/WWW.SCIPRESS.COM/ILNS.69.12
F. Butt, M. Shahzad, Seemab Khalid, Nadeem Iqbal, A. Rasheed, G. Raza
Air pollution in Pakistan is causing damage to health, environment and quality of life. Air pollution in Pakistan is not effectively monitored due to heavy cost involved in setting up ground stations. However, Satellite remote sensing can effectively monitor the air pollution in terms of Aerosol Optical Depth (AOD) at regional as well as global level. However, algorithms used to derive AOD from different sensors have some inherited differences which can pose challenges in monitoring regional AOD at high temporal resolution using more than one sensor. Therefore, this study focuses on comparison of four major satellite based AOD products namely Moderate Resolution Imaging SpectroRadiometer (MODIS), Multi-angle Imaging SpectroRadiometer (MISR), Ozone Monitoring Instrument multiwavelength (OMI) aerosol product and Cloud-Aerosol Lidar and Infrared Pathfinder Satellite Observation (CALIPSO) with the ground based AErosol RObotic NETwork (AERONET) AOD which is only available from Lahore and Karachi in Pakistan. The correlation of various AOD products with AERONET AOD is estimated statistically through coefficient of determination (R2), Root Mean Square Error (RMSE), slope and intercept. It is noticed that MODIS is relatively accurate and reliable for monitoring air quality on operational bases over the land cover area of Lahore (R2= 0.78; RMSE = 0.18 ), whereas MISR over the coastal areas of Karachi (R2= 0.82; RMSE = 0.20 ). The results of the study will help the stakeholders in planning additional ground stations for operational monitoring of air quality at regional level.
{"title":"Comparison of Aerosol Optical Depth Products from Multi-Satellites over Densely Populated Cities of Pakistan","authors":"F. Butt, M. Shahzad, Seemab Khalid, Nadeem Iqbal, A. Rasheed, G. Raza","doi":"10.18052/WWW.SCIPRESS.COM/ILNS.69.12","DOIUrl":"https://doi.org/10.18052/WWW.SCIPRESS.COM/ILNS.69.12","url":null,"abstract":"Air pollution in Pakistan is causing damage to health, environment and quality of life. Air pollution in Pakistan is not effectively monitored due to heavy cost involved in setting up ground stations. However, Satellite remote sensing can effectively monitor the air pollution in terms of Aerosol Optical Depth (AOD) at regional as well as global level. However, algorithms used to derive AOD from different sensors have some inherited differences which can pose challenges in monitoring regional AOD at high temporal resolution using more than one sensor. Therefore, this study focuses on comparison of four major satellite based AOD products namely Moderate Resolution Imaging SpectroRadiometer (MODIS), Multi-angle Imaging SpectroRadiometer (MISR), Ozone Monitoring Instrument multiwavelength (OMI) aerosol product and Cloud-Aerosol Lidar and Infrared Pathfinder Satellite Observation (CALIPSO) with the ground based AErosol RObotic NETwork (AERONET) AOD which is only available from Lahore and Karachi in Pakistan. The correlation of various AOD products with AERONET AOD is estimated statistically through coefficient of determination (R2), Root Mean Square Error (RMSE), slope and intercept. It is noticed that MODIS is relatively accurate and reliable for monitoring air quality on operational bases over the land cover area of Lahore (R2= 0.78; RMSE = 0.18 ), whereas MISR over the coastal areas of Karachi (R2= 0.82; RMSE = 0.20 ). The results of the study will help the stakeholders in planning additional ground stations for operational monitoring of air quality at regional level.","PeriodicalId":14407,"journal":{"name":"International Letters of Natural Sciences","volume":null,"pages":null},"PeriodicalIF":0.3,"publicationDate":"2018-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42287808","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}
Pub Date : 2018-06-01DOI: 10.18052/WWW.SCIPRESS.COM/ILNS.69.25
V. N. Zelenkov, A. Lapin, T. G. Belonozhkina, N. Voropaeva, Nikolay V. Shachnev, V. Karpachev
The authors carried out in the fieldwork with a new variety of amaranth «Lipetsky». In order to identify qualitative and quantitative laws of manifestation of the total antioxidant activity of amaranth the leaves were collected in different phases of plant vegetation, dehydrated in mild conditions of air-shadow drying and subsequently dried under harsh conditions 105º C to a constant mass of samples. Testing of plant samples was carried out using a coulometric method of titration (author's method) of free bromine radicals generated in the aquatic environment by plant titrant (water extract dried in the shade at a temperature of 22º±3°C of leaves). It was examined the combined samples of 10 samples of plant leaves of different tiers and of different ages with field plot of 10 ha. Biometric averages of plants during the growing season: growth, the weight of plants, number of leaves, the weight of leaves, stem and inflorescence of the plant are given. This shows the dynamics of total antioxidant activity of leaves of amaranth during the growing season. The thermal stability of the total antioxidant activity (TAA) for combined extracts of 10 samples of leaves of different ages and from different parts of plants when they are drying at 105°C was tested. The dynamics of change, TAA aqueous extracts of the dried amaranth samples with different stages of the growing season corresponds to the previously identified trends in the availability of high quantitative values in the phase of mass budding beginning of flowering and minima in the initial growth phases (3-8 leaves) and ripening of seed for different varieties of amaranth. There were revealed the increase in antioxidant activity upon drying amaranth samples at 105°C, revealed a new type of qualitative dynamics of TAA, while vegetation with a characteristic quantitative changes by more than 50% for the beginning of the growth phase (the first phase of 3-8 leaves) and the final phase of seed maturation.
{"title":"Total Antioxidant Activity of Amaranth Leaves in Оntogenesis","authors":"V. N. Zelenkov, A. Lapin, T. G. Belonozhkina, N. Voropaeva, Nikolay V. Shachnev, V. Karpachev","doi":"10.18052/WWW.SCIPRESS.COM/ILNS.69.25","DOIUrl":"https://doi.org/10.18052/WWW.SCIPRESS.COM/ILNS.69.25","url":null,"abstract":"The authors carried out in the fieldwork with a new variety of amaranth «Lipetsky». In order to identify qualitative and quantitative laws of manifestation of the total antioxidant activity of amaranth the leaves were collected in different phases of plant vegetation, dehydrated in mild conditions of air-shadow drying and subsequently dried under harsh conditions 105º C to a constant mass of samples. Testing of plant samples was carried out using a coulometric method of titration (author's method) of free bromine radicals generated in the aquatic environment by plant titrant (water extract dried in the shade at a temperature of 22º±3°C of leaves). It was examined the combined samples of 10 samples of plant leaves of different tiers and of different ages with field plot of 10 ha. Biometric averages of plants during the growing season: growth, the weight of plants, number of leaves, the weight of leaves, stem and inflorescence of the plant are given. This shows the dynamics of total antioxidant activity of leaves of amaranth during the growing season. The thermal stability of the total antioxidant activity (TAA) for combined extracts of 10 samples of leaves of different ages and from different parts of plants when they are drying at 105°C was tested. The dynamics of change, TAA aqueous extracts of the dried amaranth samples with different stages of the growing season corresponds to the previously identified trends in the availability of high quantitative values in the phase of mass budding beginning of flowering and minima in the initial growth phases (3-8 leaves) and ripening of seed for different varieties of amaranth. There were revealed the increase in antioxidant activity upon drying amaranth samples at 105°C, revealed a new type of qualitative dynamics of TAA, while vegetation with a characteristic quantitative changes by more than 50% for the beginning of the growth phase (the first phase of 3-8 leaves) and the final phase of seed maturation.","PeriodicalId":14407,"journal":{"name":"International Letters of Natural Sciences","volume":null,"pages":null},"PeriodicalIF":0.3,"publicationDate":"2018-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41561966","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}
Pub Date : 2018-04-01DOI: 10.18052/WWW.SCIPRESS.COM/ILNS.68.9
D. H. Trang, D. Dong, B. H. Chung, Dong Huy Gioi, T. Khanh
Ochna integerrima is a medicinal and ornamental plant, is widely distributed in Southeast Asia areas. In Vietnam, it has been ranked as the rare and endangered species due to its high demand trade of the beautiful species. In this study, total 21 Ochna samples, collected from the northern and southern areas, were used to characterize the morphological traits using morphological analyses and molecular tool. The results have revealed that the morphological characterization of flower and its quality of Yen Tu Ochna samples showed differences in comparison with the common Ochna and southern Ochna samples. To accurately distinguish genetic traits of the samples, we have sequenced the internal transcribed spacer (ITS) region (including ITS1, 5.8S) of 21 species. The results have disclosed the genetic correlations of the samples ranging from 96.25% to 100% among the studied Ochna samples, of which 5 samples include B1, B2, B3, B6 and N3.1 were divided into the separate groups. The current work is the first report in constructing a molecular database of Ochna for further assessment of inter-and intra-specific molecular diversity of Ochna species in Vietnam.
{"title":"Identification of Vietnamese Ochna integerrima (Lour.) Merr Species Based on Ribosomal DNA Internal Transcribed Spacer Sequence","authors":"D. H. Trang, D. Dong, B. H. Chung, Dong Huy Gioi, T. Khanh","doi":"10.18052/WWW.SCIPRESS.COM/ILNS.68.9","DOIUrl":"https://doi.org/10.18052/WWW.SCIPRESS.COM/ILNS.68.9","url":null,"abstract":"\u0000 Ochna integerrima is a medicinal and ornamental plant, is widely distributed in Southeast Asia areas. In Vietnam, it has been ranked as the rare and endangered species due to its high demand trade of the beautiful species. In this study, total 21 Ochna samples, collected from the northern and southern areas, were used to characterize the morphological traits using morphological analyses and molecular tool. The results have revealed that the morphological characterization of flower and its quality of Yen Tu Ochna samples showed differences in comparison with the common Ochna and southern Ochna samples. To accurately distinguish genetic traits of the samples, we have sequenced the internal transcribed spacer (ITS) region (including ITS1, 5.8S) of 21 species. The results have disclosed the genetic correlations of the samples ranging from 96.25% to 100% among the studied Ochna samples, of which 5 samples include B1, B2, B3, B6 and N3.1 were divided into the separate groups. The current work is the first report in constructing a molecular database of Ochna for further assessment of inter-and intra-specific molecular diversity of Ochna species in Vietnam.","PeriodicalId":14407,"journal":{"name":"International Letters of Natural Sciences","volume":null,"pages":null},"PeriodicalIF":0.3,"publicationDate":"2018-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45449058","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}
Pub Date : 2018-04-01DOI: 10.18052/WWW.SCIPRESS.COM/ILNS.68.1
Sharanpreet Singh, Jaswinder Singh, Ayushi Sharma, A. Vig, Shakoor Ahmed
The earthworm Pontoscolex corethrurus (Müller, 1857) is reported for the first time from Punjab, India. This species was first described by German naturalist Fritz Müller in 1857 from Santa Catarina state of Brazil. It is commonly found in gardens, cropland and fallowlands. It tolerates wide range of climatic and edaphic factors due to its endogeic ecological category. P. corethrurus has high efficiency for organic matter assimilation and has ability to live in new habitat due to which it can survive even in very poor soil. The life cycle of this species is well documented and this species has economic importance due to its use in waste management.
{"title":"First Report of the Earthworm Pontoscolex corethrurus (Müller, 1857) from Punjab, India","authors":"Sharanpreet Singh, Jaswinder Singh, Ayushi Sharma, A. Vig, Shakoor Ahmed","doi":"10.18052/WWW.SCIPRESS.COM/ILNS.68.1","DOIUrl":"https://doi.org/10.18052/WWW.SCIPRESS.COM/ILNS.68.1","url":null,"abstract":"The earthworm Pontoscolex corethrurus (Müller, 1857) is reported for the first time from Punjab, India. This species was first described by German naturalist Fritz Müller in 1857 from Santa Catarina state of Brazil. It is commonly found in gardens, cropland and fallowlands. It tolerates wide range of climatic and edaphic factors due to its endogeic ecological category. P. corethrurus has high efficiency for organic matter assimilation and has ability to live in new habitat due to which it can survive even in very poor soil. The life cycle of this species is well documented and this species has economic importance due to its use in waste management.","PeriodicalId":14407,"journal":{"name":"International Letters of Natural Sciences","volume":null,"pages":null},"PeriodicalIF":0.3,"publicationDate":"2018-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44489995","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}
Pub Date : 2018-04-01DOI: 10.18052/WWW.SCIPRESS.COM/ILNS.68.27
O. Khudyi, Olga Kushniryk, L. Khuda, M. Marchenko
The nutritional composition and amino acid profile of Moina macrocopa were studied using different types of yeast (Saccharomyces cerevisiae and Rhodotorula glutinis) as fodder substrates. The effective accumulation of carotenoids in Moina macrocopa during R. glutinis yeast application was not accompanied by deterioration in the nutritional value of zooplankton. The content of total proteins and total lipids in Moina grown on S. cerevisiae and R. glutinis was not significantly different. However, the use of R. glutinis in the cultivation of M. macrocopa led to the change in the ratio of proteinogenic amino acids in the studied cladocerans. In particular, the share of methionine, leucine and isoleucine significantly increased. It allowed to enhance the quality of protein in the fodder zooplankton, that is especially important in the feeding of fish fry.
{"title":"Differences in Nutritional Value and Amino Acid Composition of Moina macrocopa (Straus) Using Yeast Saccharomyces cerevisiae and Rhodotorula glutinis as Fodder Substrates","authors":"O. Khudyi, Olga Kushniryk, L. Khuda, M. Marchenko","doi":"10.18052/WWW.SCIPRESS.COM/ILNS.68.27","DOIUrl":"https://doi.org/10.18052/WWW.SCIPRESS.COM/ILNS.68.27","url":null,"abstract":"The nutritional composition and amino acid profile of Moina macrocopa were studied using different types of yeast (Saccharomyces cerevisiae and Rhodotorula glutinis) as fodder substrates. The effective accumulation of carotenoids in Moina macrocopa during R. glutinis yeast application was not accompanied by deterioration in the nutritional value of zooplankton. The content of total proteins and total lipids in Moina grown on S. cerevisiae and R. glutinis was not significantly different. However, the use of R. glutinis in the cultivation of M. macrocopa led to the change in the ratio of proteinogenic amino acids in the studied cladocerans. In particular, the share of methionine, leucine and isoleucine significantly increased. It allowed to enhance the quality of protein in the fodder zooplankton, that is especially important in the feeding of fish fry.","PeriodicalId":14407,"journal":{"name":"International Letters of Natural Sciences","volume":null,"pages":null},"PeriodicalIF":0.3,"publicationDate":"2018-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45961765","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}
Pub Date : 2018-04-01DOI: 10.18052/WWW.SCIPRESS.COM/ILNS.68.19
T. Xuan, D. Bach, Tran Dang Dat
The present study examined the correlation between phenolic acids and flavonoids with high rice yield traits of rice. It was observed that the difference of phenolic contents among the tested rice lines occurred only in the vegetative stage. The concentrations of phenolic acids were higher in the rice high yield cultivars than low yield variety in the vegetative stage, but they either decreased dramatically or disappeared during the development stage. Caffeic acid was found only in high yield rice, whereas chlorogenic acid was detected only in low yield rice. Sinapic acid was the dominant phenolic acid in high yield cultivars at vegetative stage (3.7 mg/g), followed by ferulic acid (1.2 mg/g). These findings suggest that caffeic acid, ferulic acid, sinapic acid and chlorogenic acid may play a particular role in forming yield components in rice. The cultivar B3 contained high amount of sinapic acid may be used as a natural source for pharmaceutical use.
{"title":"Involvement of Phenolics, Flavonoids, and Phenolic Acids in High Yield Characteristics of Rice (Oryza Sativa L.)","authors":"T. Xuan, D. Bach, Tran Dang Dat","doi":"10.18052/WWW.SCIPRESS.COM/ILNS.68.19","DOIUrl":"https://doi.org/10.18052/WWW.SCIPRESS.COM/ILNS.68.19","url":null,"abstract":"The present study examined the correlation between phenolic acids and flavonoids with high rice yield traits of rice. It was observed that the difference of phenolic contents among the tested rice lines occurred only in the vegetative stage. The concentrations of phenolic acids were higher in the rice high yield cultivars than low yield variety in the vegetative stage, but they either decreased dramatically or disappeared during the development stage. Caffeic acid was found only in high yield rice, whereas chlorogenic acid was detected only in low yield rice. Sinapic acid was the dominant phenolic acid in high yield cultivars at vegetative stage (3.7 mg/g), followed by ferulic acid (1.2 mg/g). These findings suggest that caffeic acid, ferulic acid, sinapic acid and chlorogenic acid may play a particular role in forming yield components in rice. The cultivar B3 contained high amount of sinapic acid may be used as a natural source for pharmaceutical use.","PeriodicalId":14407,"journal":{"name":"International Letters of Natural Sciences","volume":null,"pages":null},"PeriodicalIF":0.3,"publicationDate":"2018-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46556393","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}
Pub Date : 2018-02-01DOI: 10.18052/WWW.SCIPRESS.COM/ILNS.67.1
A. Matsoukis, A. Kamoutsis, K. Chronopoulos
The occurrence of forest fires is frequent phenomenon in Greece, especially during the warmest period of the year, the summer. Timely and reliable estimation of the meteorological risk for their onset is of crucial importance for their prevention. Thus, the purpose of our current work was firstly the estimation of the values of a suitable relevant index for Greece, meteorological forest fire risk index (MKs,t), derived from actual air temperature (T) and relative humidity data (RH) as well as from regressed T and RH, in a mountainous region (MR) for the most dangerous period of the year (July-August) and day (11:00 h-16:00 h), for five successive years (2006-2010) and secondly the comparison of the two ways of MKs,t values estimation (from actual and regressed T and RH), based on MKs,t classes. Regressed T and RH data were estimated with the aid of simple linear regression models from remote T and RH data, respectively, of an urban region, 175 Km away from MR, taking into account firstly the warmest (2007) and the coldest (2006) year of the examined year period. It was confirmed that MKs,t values (based on regressed T and RH data) coincided in their classification to the respective ones resulted from actual T and RH data, that is, there was absolute success (100%). Using common regression lines and applying them to estimate separately T and RH at MR, for the most dangerous period of year and day concerning the whole examined year period, it was found that almost all the estimated MKs,t values coincided, regarding their classification, with those estimated from actual T and RH data (97% success), which was considered very satisfactory. Therefore, our research methodology contributes a new perspective to a reliable estimation of MKs,t from remote T and RH data using simple statistical models.
{"title":"Estimation of the Meteorological Forest Fire Risk in a Mountainous Region by Using Remote Air Temperature and Relative Humidity Data","authors":"A. Matsoukis, A. Kamoutsis, K. Chronopoulos","doi":"10.18052/WWW.SCIPRESS.COM/ILNS.67.1","DOIUrl":"https://doi.org/10.18052/WWW.SCIPRESS.COM/ILNS.67.1","url":null,"abstract":"The occurrence of forest fires is frequent phenomenon in Greece, especially during the warmest period of the year, the summer. Timely and reliable estimation of the meteorological risk for their onset is of crucial importance for their prevention. Thus, the purpose of our current work was firstly the estimation of the values of a suitable relevant index for Greece, meteorological forest fire risk index (MKs,t), derived from actual air temperature (T) and relative humidity data (RH) as well as from regressed T and RH, in a mountainous region (MR) for the most dangerous period of the year (July-August) and day (11:00 h-16:00 h), for five successive years (2006-2010) and secondly the comparison of the two ways of MKs,t values estimation (from actual and regressed T and RH), based on MKs,t classes. Regressed T and RH data were estimated with the aid of simple linear regression models from remote T and RH data, respectively, of an urban region, 175 Km away from MR, taking into account firstly the warmest (2007) and the coldest (2006) year of the examined year period. It was confirmed that MKs,t values (based on regressed T and RH data) coincided in their classification to the respective ones resulted from actual T and RH data, that is, there was absolute success (100%). Using common regression lines and applying them to estimate separately T and RH at MR, for the most dangerous period of year and day concerning the whole examined year period, it was found that almost all the estimated MKs,t values coincided, regarding their classification, with those estimated from actual T and RH data (97% success), which was considered very satisfactory. Therefore, our research methodology contributes a new perspective to a reliable estimation of MKs,t from remote T and RH data using simple statistical models.","PeriodicalId":14407,"journal":{"name":"International Letters of Natural Sciences","volume":null,"pages":null},"PeriodicalIF":0.3,"publicationDate":"2018-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47925126","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}
Pub Date : 2018-02-01DOI: 10.18052/WWW.SCIPRESS.COM/ILNS.67.16
Nehar Parvin, M. A. Kader, R. Huque, M. Molla, M. A. Khan
The effect of irradiated chitosan coating on post-harvest preservation of tomato was observed in this study. Irradiated chitosan (40 kGy) solution of various concentrations (500, 750, 1000, 1500 and 2000 ppm) were applied on post-harvest preservation of tomato. Both chitosan treated and untreated (control) tomato were stored at room temperature in open and zip bag conditions. The effect of coating of various chitosan solutions on tomato were observed during storage period. The percentage of weight loss and spoilage rate of the preserved and control tomato samples were investigated. Several parameters (such as total bacteria count, total mold count, moisture, ash, acidity, vitamin C, sugar, protein and fat) were analyzed for irradiated chitosan coated tomato in open condition after 3-weeks storage period. In addition, the same parameters were also analyzed for control tomato. Considering all parameters, the results revealed that 1500 ppm chitosan solution performed better in extending the shelf- life of tomato as compared to the control and other treated samples. Thus, this observation recommend that irradiated chitosan coating have the potential to be used as natural preservative to maintain quality and extending shelf-life of tomato.
{"title":"Extension of Shelf-Life of Tomato Using Irradiated Chitosan and its Physical and Biochemical Characteristics","authors":"Nehar Parvin, M. A. Kader, R. Huque, M. Molla, M. A. Khan","doi":"10.18052/WWW.SCIPRESS.COM/ILNS.67.16","DOIUrl":"https://doi.org/10.18052/WWW.SCIPRESS.COM/ILNS.67.16","url":null,"abstract":"The effect of irradiated chitosan coating on post-harvest preservation of tomato was observed in this study. Irradiated chitosan (40 kGy) solution of various concentrations (500, 750, 1000, 1500 and 2000 ppm) were applied on post-harvest preservation of tomato. Both chitosan treated and untreated (control) tomato were stored at room temperature in open and zip bag conditions. The effect of coating of various chitosan solutions on tomato were observed during storage period. The percentage of weight loss and spoilage rate of the preserved and control tomato samples were investigated. Several parameters (such as total bacteria count, total mold count, moisture, ash, acidity, vitamin C, sugar, protein and fat) were analyzed for irradiated chitosan coated tomato in open condition after 3-weeks storage period. In addition, the same parameters were also analyzed for control tomato. Considering all parameters, the results revealed that 1500 ppm chitosan solution performed better in extending the shelf- life of tomato as compared to the control and other treated samples. Thus, this observation recommend that irradiated chitosan coating have the potential to be used as natural preservative to maintain quality and extending shelf-life of tomato.","PeriodicalId":14407,"journal":{"name":"International Letters of Natural Sciences","volume":null,"pages":null},"PeriodicalIF":0.3,"publicationDate":"2018-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45575877","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}
Pub Date : 2018-02-01DOI: 10.18052/WWW.SCIPRESS.COM/ILNS.67.9
P. T. T. Ha, T. Xuan
Lactic acid has known as a one of compounds to cause cellular harm in waterlogged tissue through the process of cytoplasmic acidosis. The effects of lactic acid on α-amylase activity and phytic acid content using an assay for high phosphate in germination stage of rice were evaluated. It is showed that lactic acid inhibited rice germination at every treated dose. The reduction of α-amylase content attributed to lactic acid at 24 h after germination of rice seeds was observed. The analysis of phosphate concentration at 48 h after treatment noted that although the content of phytic acid was reduced in Japonica varieties, but in contrast its amount was enhanced in Indica cultivars. The findings highlighted the positive effects of lactic acid on α-amylase activity and phytic acid content and suggested that this compound may play a potent role as a germinated regulator in rice.
{"title":"Effect of Lactic Acid on α-Amylase Activity and Phytic Acid Content in Germination of Rice (Oryza sativa L.)","authors":"P. T. T. Ha, T. Xuan","doi":"10.18052/WWW.SCIPRESS.COM/ILNS.67.9","DOIUrl":"https://doi.org/10.18052/WWW.SCIPRESS.COM/ILNS.67.9","url":null,"abstract":"Lactic acid has known as a one of compounds to cause cellular harm in waterlogged tissue through the process of cytoplasmic acidosis. The effects of lactic acid on α-amylase activity and phytic acid content using an assay for high phosphate in germination stage of rice were evaluated. It is showed that lactic acid inhibited rice germination at every treated dose. The reduction of α-amylase content attributed to lactic acid at 24 h after germination of rice seeds was observed. The analysis of phosphate concentration at 48 h after treatment noted that although the content of phytic acid was reduced in Japonica varieties, but in contrast its amount was enhanced in Indica cultivars. The findings highlighted the positive effects of lactic acid on α-amylase activity and phytic acid content and suggested that this compound may play a potent role as a germinated regulator in rice.","PeriodicalId":14407,"journal":{"name":"International Letters of Natural Sciences","volume":null,"pages":null},"PeriodicalIF":0.3,"publicationDate":"2018-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41889876","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：