International Letters of Natural Sciences最新文献_第9页

Responses of Maize Varieties to Salt Stress in Relation to Germination and Seedling Growth 玉米品种对盐胁迫的响应与萌发和幼苗生长的关系

IF 0.3

International Letters of Natural Sciences Pub Date : 2018-06-01 DOI: 10.18052/WWW.SCIPRESS.COM/ILNS.69.1

N. Hassan, M. K. Hasan, Md. Obaidullah Shaddam, M. Islam, C. Barutçular, Ayman El Sabagh

{"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}

引用次数: 15

Comparison of Aerosol Optical Depth Products from Multi-Satellites over Densely Populated Cities of Pakistan 巴基斯坦人口稠密城市上空多卫星气溶胶光学深度产物的比较

IF 0.3

International Letters of Natural Sciences Pub Date : 2018-06-01 DOI: 10.18052/WWW.SCIPRESS.COM/ILNS.69.12

F. Butt, M. Shahzad, Seemab Khalid, Nadeem Iqbal, A. Rasheed, G. Raza

{"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}

引用次数: 5

Total Antioxidant Activity of Amaranth Leaves in Оntogenesis Оntogenesis苋菜叶总抗氧化活性研究

IF 0.3

International Letters of Natural Sciences Pub Date : 2018-06-01 DOI: 10.18052/WWW.SCIPRESS.COM/ILNS.69.25

V. N. Zelenkov, A. Lapin, T. G. Belonozhkina, N. Voropaeva, Nikolay V. Shachnev, V. Karpachev

{"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}

引用次数: 0

Identification of Vietnamese Ochna integerrima (Lour.) Merr Species Based on Ribosomal DNA Internal Transcribed Spacer Sequence 基于核糖体DNA内部转录间隔区序列的越南梨品种鉴定

IF 0.3

International Letters of Natural Sciences Pub Date : 2018-04-01 DOI: 10.18052/WWW.SCIPRESS.COM/ILNS.68.9

D. H. Trang, D. Dong, B. H. Chung, Dong Huy Gioi, T. Khanh

{"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}

引用次数: 1

First Report of the Earthworm Pontoscolex corethrurus (Müller, 1857) from Punjab, India 来自印度旁遮普邦的蚯蚓Pontoscolex corethurus的首次报告（Müller，1857）

IF 0.3

International Letters of Natural Sciences Pub Date : 2018-04-01 DOI: 10.18052/WWW.SCIPRESS.COM/ILNS.68.1

Sharanpreet Singh, Jaswinder Singh, Ayushi Sharma, A. Vig, Shakoor Ahmed

引用次数: 3

Differences in Nutritional Value and Amino Acid Composition of Moina macrocopa (Straus) Using Yeast Saccharomyces cerevisiae and Rhodotorula glutinis as Fodder Substrates 以酵母、酿酒酵母和粘红酵母为饲料底物的大月牙蛾营养价值和氨基酸组成的差异

IF 0.3

International Letters of Natural Sciences Pub Date : 2018-04-01 DOI: 10.18052/WWW.SCIPRESS.COM/ILNS.68.27

O. Khudyi, Olga Kushniryk, L. Khuda, M. Marchenko

引用次数: 5

Involvement of Phenolics, Flavonoids, and Phenolic Acids in High Yield Characteristics of Rice (Oryza Sativa L.) 酚类、黄酮类和酚酸在水稻高产特性中的作用

IF 0.3

International Letters of Natural Sciences Pub Date : 2018-04-01 DOI: 10.18052/WWW.SCIPRESS.COM/ILNS.68.19

T. Xuan, D. Bach, Tran Dang Dat

引用次数: 7

Estimation of the Meteorological Forest Fire Risk in a Mountainous Region by Using Remote Air Temperature and Relative Humidity Data 利用遥感气温和相对湿度数据估算山区森林火灾气象风险

IF 0.3

International Letters of Natural Sciences Pub Date : 2018-02-01 DOI: 10.18052/WWW.SCIPRESS.COM/ILNS.67.1

A. Matsoukis, A. Kamoutsis, K. Chronopoulos

{"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}

引用次数: 4

Extension of Shelf-Life of Tomato Using Irradiated Chitosan and its Physical and Biochemical Characteristics 辐照壳聚糖对番茄保鲜期的影响及其理化特性研究

IF 0.3

International Letters of Natural Sciences Pub Date : 2018-02-01 DOI: 10.18052/WWW.SCIPRESS.COM/ILNS.67.16

Nehar Parvin, M. A. Kader, R. Huque, M. Molla, M. A. Khan

{"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}

引用次数: 7

Effect of Lactic Acid on α-Amylase Activity and Phytic Acid Content in Germination of Rice (Oryza sativa L.) 乳酸对水稻（Oryza sativa L.）发芽过程中α-淀粉酶活性和脂肪酸含量的影响

IF 0.3

International Letters of Natural Sciences Pub Date : 2018-02-01 DOI: 10.18052/WWW.SCIPRESS.COM/ILNS.67.9

P. T. T. Ha, T. Xuan

引用次数: 4