Rafidain journal of science最新文献_第5页

Spectrophotometric Estimation of Lanthanum with Alizarine Red S and Triton X-100 -Applications to Water Samples and Urine 茜素红S和Triton X-100分光光度法测定镧在水样和尿液中的应用

Rafidain journal of science Pub Date : 2023-06-01 DOI: 10.33899/rjs.2023.178572

Ahmad G. Ismael, Salim J. Mohammed

{"title":"Spectrophotometric Estimation of Lanthanum with Alizarine Red S and Triton X-100 -Applications to Water Samples and Urine","authors":"Ahmad G. Ismael, Salim J. Mohammed","doi":"10.33899/rjs.2023.178572","DOIUrl":"https://doi.org/10.33899/rjs.2023.178572","url":null,"abstract":"This method involves the development of a highly sensitive spectrophotometric procedure to estimate lanthanum in an aqueous medium. The procedure involved the treatment of lanthanum with Alizarine Red S as chromophor reagent in presence of neutral surfactant (Triton X-100). At pH4.5, a soluble red complex was produced and exhibited absorption peak with maximum absorption at 523nm. The calibration graph was linear and compatible to Beer's law over the range of concentration 0.125 to 10.0 µg.ml -1 with determination coefficient (R 2 =0.9994). The apparent molar absorptivity of the complex La-ARS was found to be 0.7222x10 4 l.mol -1 .cm -1 which corresponds to the sensitivity of Sandell’s index of 1910.0 µg.cm -2 . The stoichiometric of the complex was studied and it is equal to 1:2 (La: ARS). The values of LOD, LOQ and the range of recovery percentage were estimated and found to be 0.04182, 0.04434 µg.ml -1 and 96.1% to 103.5%, respectively. The precision (RSD) was also calculated and found to be in the range 0.469 to 1.612. The proposed procedure has been applied successfully for the determination of lanthanum in natural waters and urine sample.","PeriodicalId":20803,"journal":{"name":"Rafidain journal of science","volume":"10 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91539188","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

Bioplastic Degradation, Production and Genetic Improvements of Bioplastic Producing Strains: A review 生物塑料降解、生产及产塑菌株的遗传改良研究进展

Rafidain journal of science Pub Date : 2023-06-01 DOI: 10.33899/rjs.2023.178577

Rayan M. Faisal, R. Alsaffar

{"title":"Bioplastic Degradation, Production and Genetic Improvements of Bioplastic Producing Strains: A review","authors":"Rayan M. Faisal, R. Alsaffar","doi":"10.33899/rjs.2023.178577","DOIUrl":"https://doi.org/10.33899/rjs.2023.178577","url":null,"abstract":"Plastics have been polluting the environment for a long time due to their persistence in all ecosystems and especially in the marine ecosystem. Until now, the best candidate found to substitute these products are the bioplastics. This is due to the presence of bacteria that can degrade them in nature and the similarities they show in their structure to petroleum-based plastics. These polymers are represented by polyhydroxy alcanoates (PHAs) and are produced naturally by bacterial cells as reservoir compounds for carbon and energy. Many PHA-producing microbial strains have been isolated worldwide including bacterial and fungal genera which could be used to produce bioplastics commercially. However, the major obstacle behind preventing the prevalence of bioplastics is their raw material cost. As a result, many studies have been conducted to produce PHAs, and their derivatives from waste raw materials. This will help to eliminate the cost of bioplastic production and simultaneously save the environment from an unfavorable accumulation of such wastes. Genetics has played an essential role in reducing the cost of bioplastics by manipulating microorganisms to produce more efficient bioplastic producers. Disrupting some genes and introducing others has been found to be helpful for the accumulation of PHAs in microbial producers.","PeriodicalId":20803,"journal":{"name":"Rafidain journal of science","volume":"81 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87472551","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

Shielding Properties of Al- Cu- Pb Alloys by XCOM and Experimental Data 铝-铜-铅合金的XCOM屏蔽性能及实验数据

Rafidain journal of science Pub Date : 2023-06-01 DOI: 10.33899/rjs.2023.178582

Karam Abd Al- Aziz, M. Hamood, Laith Najam, Ayman Al Sawalha, Howaida Ahmed

引用次数: 0

Physiological Effects of Biological Control Aureobasidium pullulans on Barley Varieties Infected with Rhizoctonia solani 根腐心菌对大麦品种的生理防治效果

Rafidain journal of science Pub Date : 2023-03-01 DOI: 10.33899/rjs.2023.177288

Thuraya Al-zubaidy, Hadeel A. Al-Ameri

{"title":"Physiological Effects of Biological Control Aureobasidium pullulans on Barley Varieties Infected with Rhizoctonia solani","authors":"Thuraya Al-zubaidy, Hadeel A. Al-Ameri","doi":"10.33899/rjs.2023.177288","DOIUrl":"https://doi.org/10.33899/rjs.2023.177288","url":null,"abstract":"In a greenhouse experiment, barley varieties infected with R. solani showed a significant decrease in plant height, number of leaves, spike number, and number of grains in spike while the treatment of these varieties with biological control Aureobasidium pullulans showed a significant increase in plant height, number of leaves, number of spikes, and number of grains in spike compared to untreated one. moreover, of biological control A . pullulans to R . solani induced a significant improvement in vegetative growth, In the treatment with biological control A . pullulans in addition to R. solani , the highest rate of plant height was found in Aswad two rows variety and reaching 38.81cm. in the second reading, up from 16.52 cm. in the first reading. Among Rehan white six rows that received the treatment with R. solani alone, the lowest plant height, reached 22.08 cm. in the second reading, and it increased from the first reading. Ebaa 265 White six rows variety produced the most number in the treatment with biological control A. pullulans added to R. solani , reaching 8.66 leaves per plant., In the Nour white two rows variety, the lowest leaf rate was 6.6 leaves in the treatment R. solani alone. Aswad two rows variety exhibited the highest spike of barley when treated with biological control A. pullulans alone, reaching 5 spikes in the first, second, and third readings. Among the three readings, there were no spikes in Samir White variety when treated with R. solani alone. the average grains number in spikes, the highest rate was in the treatment of sterilized soil with formalin (control) in Aswad two rows variety which amounted to 7.67 grains in the second reading, up from 7.2 grains in the four reading. Biological control A. pullulans were added to R. solani in the variety Ebaa 265 White six rows, as it, and increased from 4.6 grains in the first to 9.8 in the second reading.","PeriodicalId":20803,"journal":{"name":"Rafidain journal of science","volume":"60 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85634092","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

Effect of Lubanum and Potash Alum on Co-aggregation and Biofilm Formation of Porphyromonas gingivalis, Treponema denticola and Tannerella forsythia 苜蓿和钾明矾对牙龈卟啉单胞菌、齿状密螺旋体和连翘单宁菌共聚集和生物膜形成的影响

Rafidain journal of science Pub Date : 2023-03-01 DOI: 10.33899/rjs.2023.177287

Sumaya A. S. M. Al-Hamdoni, A. Al-Rawi, E. Oparaji

引用次数: 0

Synthesis, Characterization of some new Heterocyclic Compounds Derived from Chalcones Containing Schiff Bases 含席夫碱查尔酮类杂环化合物的合成与表征

Rafidain journal of science Pub Date : 2023-03-01 DOI: 10.33899/rjs.2023.177295

tharee Ghanim, A. Omar

引用次数: 0

Spectrophotometric Determination of Isoniazid in Pharmaceutical Preparations Using Oxidative Coupling Reaction with 2,4-dinitrophenylhydrazine 用2,4-二硝基苯肼氧化偶联反应分光光度法测定药物制剂中的异烟肼

Rafidain journal of science Pub Date : 2023-03-01 DOI: 10.33899/rjs.2023.178227

Shaimaa Nayif, D. Mohammed

引用次数: 0

Biological Control of some Weeds with Aqueous Extract of Wheat (Triticum aestivum L.) 小麦水提液对几种杂草的生物防治

Rafidain journal of science Pub Date : 2023-03-01 DOI: 10.33899/rjs.2023.177289

W. S. Hussain, Mahmmod Abbas, Raid Al-Safar

引用次数: 0

The Identification and Synthesis of Barium-Substituted Lead Hydroxyapatite Structure (Pb10-x Bax (PO4)6(OH)2) by Ceramic Method 钡取代铅羟基磷灰石结构(Pb10-x Bax (PO4)6(OH)2)的陶瓷鉴定与合成

Rafidain journal of science Pub Date : 2023-03-01 DOI: 10.33899/rjs.2023.177294

Mohammed A. B. Abdul Jabar

引用次数: 1

Survey and Prevalence of Lice Infestation the Pigeons (Columba livia domestica) in Kurdistan Region-Iraq 伊拉克库尔德斯坦地区鸽子(Columba livia domestica)虱病调查及流行情况

Rafidain journal of science Pub Date : 2023-03-01 DOI: 10.33899/rjs.2023.177282

M. Al-badrani, S. Al-muffti

引用次数: 0