Natural Resources最新文献_第10页

Biochemical Characterization of Three Vegetable Based Fermented Food Products (Hungrii, Rhujuk and Tsutuocie) of Nagaland, India 印度那加兰邦三种蔬菜发酵食品(红豆、黄竹和土豆蔻)的生化特性

Natural Resources Pub Date : 2021-02-09 DOI: 10.4236/NR.2021.122004

B. Jamir, C. R. Deb

{"title":"Biochemical Characterization of Three Vegetable Based Fermented Food Products (Hungrii, Rhujuk and Tsutuocie) of Nagaland, India","authors":"B. Jamir, C. R. Deb","doi":"10.4236/NR.2021.122004","DOIUrl":"https://doi.org/10.4236/NR.2021.122004","url":null,"abstract":"Indigenous fermented foods are important constituent \u0000of staple diet of the Naga tribes of India. In Nagaland, there are variety of \u0000fermented foods and beverages with traditional and cultural value. Agriculture \u0000being the main occupation, preservation technique of perishable crops has been \u0000passed down from generation to generation. Here we present the biochemical \u0000characterization of some vegetable based fermented food products of Nagaland i.e., Hungrii (Brassica leaves), Rhujuk/Bastanga (Bamboo shoot) and Tsutuocie (Cucumber). The comparative account of nutritive values like moisture \u0000content, pH, protein content, reducing sugars, crude fibre, total phenol \u0000content, flavonoid content and antioxidant activity of fermented foods and its \u0000constituent raw materials was done. Results \u0000indicated high amounts of protein in Hungrii (34.07 g/100g). Most of the fermented foods had low moisture content \u0000rendering it to have longer shelf life. Rhujuk/Bastanga was found to have significantly \u0000higher levels of phenolic content (1.44 mg GAE/g and 2.44 mg GAE/g), thus having high antioxidant activity in \u0000comparison to the other fermented \u0000products. This present study thus puts some light on the proximate \u0000composition as well as the antioxidant content of some major vegetable based \u0000fermented food products of Nagaland so as to popularize these products as \u0000nutritional support to the region for health improvement.","PeriodicalId":19086,"journal":{"name":"Natural Resources","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-02-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82388164","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: 2

Bridge Plug Drillouts Cleaning Practices—An Overview 桥塞钻出清洗方法概述

Natural Resources Pub Date : 2021-02-09 DOI: 10.4236/NR.2021.122003

H. Trabelsi, A. Seibi, Ning Liu, F. Boukadi, R. Trabelsi

{"title":"Bridge Plug Drillouts Cleaning Practices—An Overview","authors":"H. Trabelsi, A. Seibi, Ning Liu, F. Boukadi, R. Trabelsi","doi":"10.4236/NR.2021.122003","DOIUrl":"https://doi.org/10.4236/NR.2021.122003","url":null,"abstract":"Horizontal fracture-simulated completions remain the most reliable method of producing hydrocarbons from shale formations. The vast majority of unconventional wells are completed using the “Plug and Perf” method. This method involves using either a coiled tubing (CT) with a positive displacement motor or a jointed pipe to mill out composite plugs after fracturing operations are completed. An estimated average of 120,000 composite plugs is installed in the US alone each year. Bridge plug drillouts from milling operations tend to accumulate in horizontal wells and can cause stuck pipe incidents and loss of well control. Efficient removal of composite plugs’ debris is crucial in achieving operational efficacies and full production potential. This paper provides an overview of the various bridge plug drillouts cleaning practices adopted in horizontal wells. It discusses several case histories, showcasing how operators solved cleanout challenges. Developed mechanistic models to better understand hole cleaning are also reviewed. As more unconventional wells are being set at more extensive depths, an economical and optimized coiled tubing process becomes increasingly important. This paper focuses on delivering a more conclusive set of recommendations to increase efficiency and improve current composite plug coiled tubing cleaning-milling practices, increase operational efficiency and reduce cost.","PeriodicalId":19086,"journal":{"name":"Natural Resources","volume":"117 1","pages":"19-33"},"PeriodicalIF":0.0,"publicationDate":"2021-02-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73507010","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

Determine the Optimal Density of Nile Tilapia (Oreochromis niloticus) Fingerlings Cultured in Floating Cages 尼罗罗非鱼(Oreochromis niloticus)漂浮网箱鱼种最佳密度的确定

Natural Resources Pub Date : 2021-01-26 DOI: 10.4236/NR.2021.121001

B. Nouman, O. Egbal, Y. Sana, M. Anwar, A. Eman, F. A. Yosif

{"title":"Determine the Optimal Density of Nile Tilapia (Oreochromis niloticus) Fingerlings Cultured in Floating Cages","authors":"B. Nouman, O. Egbal, Y. Sana, M. Anwar, A. Eman, F. A. Yosif","doi":"10.4236/NR.2021.121001","DOIUrl":"https://doi.org/10.4236/NR.2021.121001","url":null,"abstract":"The objective of the study was to determine the optimal density of fingerlings of the Nile tilapia (Oreochromis niloticus) culture in floating cages with respect to growth performance and to know the effect of temperature on growth during the winter period. Tilapia fingerlings (mean weight 8.5 ± 0.36 g) were stocked at densities of 120, 180 and 360 fish/m3 for 10 weeks. During culture, fish were fed a diet contains 35% protein made of peanut seed, cottonseed, wheat bran, and Sorghum. The results showed that the increase in fish density reduced the final weight of the fish. The percentage of the fish weight increased and reached 111% ± 1.45% in the lowest fish density (120 fish/m3), 79% ± 1.87% in the medium density (240 fish/m3), and 63% ± 2.03% of high fish density (360 fish/m3), therefore the daily growth rate was better in the lowest density. The rate of food conversion ratio was also better in the lowest density with 2.17 ± 0.33, followed by the medium density with 2.79 ± 0.28 and then the highest density with 3.09 ± 0.21. However, the total production in the cage increased with increasing fish density, and the return to the cost of food was better with higher fish density. According to various performance evaluation criteria, it can be concluded that the medium density 240 fish/m3 is the best for growing Nile tilapia fingerlings in floating cages. It was observed that the growth rates of the three treatments were low due to the decrease in water temperature in most of the study period, which may indicate the useless of culture in cages in the winter season.","PeriodicalId":19086,"journal":{"name":"Natural Resources","volume":"2114 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-01-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91355679","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

Impact of Domestic Solid Waste Management on Wet Land Water Quality: Case of Abomey-Calavi Municipality in Benin Republic 生活固体废物管理对湿地水质的影响:以贝宁共和国Abomey-Calavi市为例

Natural Resources Pub Date : 2021-01-26 DOI: 10.4236/NR.2021.121002

N. Topanou, J. Fatombi, J. Gbaguidi, T. Aminou, J. Gérard, M. Domeizel

{"title":"Impact of Domestic Solid Waste Management on Wet Land Water Quality: Case of Abomey-Calavi Municipality in Benin Republic","authors":"N. Topanou, J. Fatombi, J. Gbaguidi, T. Aminou, J. Gérard, M. Domeizel","doi":"10.4236/NR.2021.121002","DOIUrl":"https://doi.org/10.4236/NR.2021.121002","url":null,"abstract":"The waste management is a major environmental challenge in all the countries. In the Republic of Benin, in absence of controlled landfill, the wetlands are filling in by solid household waste to set up housing environments. This study aimed at identifying the various forms of wetlands water pollutions originated by this practice. Physico-chemical parameters of sampling water were determined by using Ionic chromatography and spectrometry of atomic absorption. The microorganisms indicating fecal peril were identified by the conventional techniques of microbiology. Water quality of a witness well was also used to assess the general water quality of the backfilled wetland. The results revealed the water samples collected from backefilled wetlands were mineralized (898.32 ± 6.13 μs/cm), rich in chlorinate (237.80 ± 4.23 mg/L) and nitrates ions (224.10 ± 3.42 mg/L). They are more colored (399.23 ± 3.01 Pt/Co) and more turbid (62.5 ± 2.48 NTU) than those of the unfilled wetlands. The results of microbiological analysis shown the presence of the cysts of Giardia lamblia (590/100 L) and cysts of Entamoeba histolytica (13/100 L) in all water, except those of witness well. The frequency of water contamination by bacteria indicating general degradation is 86.4%. The embankment of the wetlands by the solid household waste leads to the water pollution.","PeriodicalId":19086,"journal":{"name":"Natural Resources","volume":"495 1","pages":"10-17"},"PeriodicalIF":0.0,"publicationDate":"2021-01-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78132492","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

The Metallogenic Setting of Terminal Orogenic Gold Deposits 末造山带金矿成矿环境

Natural Resources Pub Date : 2021-01-01 DOI: 10.4236/nr.2021.1210024

N. Duke

引用次数: 0

Investigation on Open-Circuit Voltage of an Efficiency-Boosting Solar Cell Technique Featuring V-Configuration v型增效太阳能电池开路电压研究

Natural Resources Pub Date : 2021-01-01 DOI: 10.4236/nr.2021.1212026

Jianming Li

引用次数: 0

A Research on the Usage of Corn Cob in Producing Lightweight Concrete 玉米芯在生产轻量化混凝土中的应用研究

Natural Resources Pub Date : 2021-01-01 DOI: 10.4236/nr.2021.1210023

Sermin Polat

引用次数: 2

Estimation of Minimum Miscibility Pressure for Flue Gas Injection Using Soft Experimentations 用软实验估算烟气喷射最小混相压力

Natural Resources Pub Date : 2021-01-01 DOI: 10.4236/nr.2021.1211025

Oluwaseun Oyinloye, Naeema Al Darmaki, M. Zarooni, F. Boukadi, Hildah Nantongo

引用次数: 4

Rainfall-Runoff Simulation and Modelling Using HEC-HMS and HEC-RAS Models: Case Study Tabuk, Saudi Arabia 使用HEC-HMS和HEC-RAS模型的降雨径流模拟和建模:沙特阿拉伯Tabuk的案例研究

Natural Resources Pub Date : 2021-01-01 DOI: 10.4236/nr.2021.1210022

Ali Alsubeai, S. Burckhard

{"title":"Rainfall-Runoff Simulation and Modelling Using HEC-HMS and HEC-RAS Models: Case Study Tabuk, Saudi Arabia","authors":"Ali Alsubeai, S. Burckhard","doi":"10.4236/nr.2021.1210022","DOIUrl":"https://doi.org/10.4236/nr.2021.1210022","url":null,"abstract":"Flooding regimes in arid regions are heavily influenced by climate change, water shortage, water regulations, and increased water demands. The low amount of annual precipitation due to the desert climate may lead to false estimations of flooding hazards. This study analyzed flash floods caused by short-intense rainstorms. The objective of this study was to determine flood risk related to identified precipitation depths. The project quantized the runoff corresponding to different design storms and used hydraulics and geospatial data to determine flood elevations. The study constructed hydrologic and hydraulic models to quantify flood hazards in the adjacent area of Wadi Abu Nashayfah. Peak discharges for the wadi were computed by using observed rainfall data, and the output of this process was applied to compute water surface elevations within the flow channel. At upstream, there is a high potential of flooding when Wadi Abu Nashayfah receives a minimum of 25 mm of rain which generates 40.60 m/s of peak discharge, thus, at this point the stream will overtop its banks and risking the adjacent area. In the second case, flow will overtop its banks when the channel receives at least 35 mm of rain and peak discharge level to 67.20 m/s. While flow will reach bank full point if wadi Abu Nashayfah receives 10.00 mm of rain and generates 14.80 m/s of streams downstream. The depth of precipitation at which the channel was overtopped was determined in several locations. The predicted overtopping was compared to historic events with good agreement.","PeriodicalId":19086,"journal":{"name":"Natural Resources","volume":"8 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87773595","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: 3

The Edible and Medicinal Value of Coix lacryma-jobi and Key Cultivation Techniques for High and Stable Yield 薏米食药价值及高产稳产关键栽培技术研究

Natural Resources Pub Date : 2020-12-04 DOI: 10.4236/nr.2020.1112034

Li Feng, Yonghong Zhao, Zhuqi Zhang, Shengai Zhang, Hongxia Zhang, Mingli Yu, Yiwei Ma

{"title":"The Edible and Medicinal Value of Coix lacryma-jobi and Key Cultivation Techniques for High and Stable Yield","authors":"Li Feng, Yonghong Zhao, Zhuqi Zhang, Shengai Zhang, Hongxia Zhang, Mingli Yu, Yiwei Ma","doi":"10.4236/nr.2020.1112034","DOIUrl":"https://doi.org/10.4236/nr.2020.1112034","url":null,"abstract":"In this paper, it was introduced that Coix \u0000lacryma-jobi is a traditional dual-use edible and medicine crops in China, and the \u0000nutritional components and medicinal value of Coix lacryma-jobi were \u0000described. Based on the published literature at home and abroad, a variety of \u0000chemical components found in Coix lacryma jobi and their medicinal \u0000effects were reviewed. At the same time, the problems existing in the production of Coix \u0000lacryma jobi were put forward. With the improvement of people’s living \u0000standards, the nutritional and health care value of Coix lacryma-jobi has been paid more and more attention. The problems of Coix lacryma-jobi in \u0000production were analyzed. Some biological \u0000characteristics of Coix lacryma-jobi, especially its hygrophyte \u0000characteristics, were re-recognized, which is very important to increase the \u0000yield of Coix lacryma jobi. In the paper, the key cultivation techniques \u0000for high and stable yield of Coix lacryma-jobi were also summarized. In order to obtain high quality, high and \u0000stable yield, we should adopt the new technical methods of “two wet, two dry \u0000and two water” in water management. At the same time, if artificial pollination is \u0000applied in the peak of flowering period, the seed setting rate and the yield \u0000will be increased.","PeriodicalId":19086,"journal":{"name":"Natural Resources","volume":"3 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-12-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"72654351","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: 9