scholarly journals Preparation of Organic Seleno cystine Using Locally Isolated Yeast

2018 ◽  
Vol 8 (1) ◽  
pp. 8-16
Author(s):  
Fouad Houssein Kamel
Keyword(s):  
Atomic Absorption ◽  
High Performance ◽  
Atomic Absorption Spectrophotometer ◽  
Selenium Compound ◽  
Low Concentration ◽  
Standard Product

selenium is a toxic inorganic form at very low concentration to the life, while theorganic-selenium compound sareappre ciableinterest and various of them haveessentialrolesinnutritionalscienceandcellbiochemistry.Selenium-enrichedyeast(Seyeast)isapublicformofseleniumusedtoadditionaldietaryintakeofthisessentialtracemineral.Inthisstudy,weprepareanorganicselenocystinebyusinglocallyisolatedbakeryyeast(Saccharomycescerevisiae).Anovellocallyprepareddateextractmediaenrichedby0.2%potassiumphosphate(KH2PO4),0.6%ammoniumsulfatewasadoptedasalternativeculturemedia.Seleniumsaltwas used in differentconcentrations(30,60,120and240μg/mL),whichwereaddedtotheyeastculturemedia.Whilethebestconcentrationofseleniumaddedwas30μg/mL,itachievedoptimalconditionsforthegrowthof red coloryea stidentical to the standard.Theorganicselenocystine ereanalyzed by High Performance LiquidChromatography (HPLC) and Atomic Absorption Spectrophotometer (AAS) comparing with standard product obtained from Sigma. Results confirmedtheformationofsimilarselenocystineproducts

Assessing Zinc Amassing in Forages, Buffalo Blood and Topsoil Collected from Sargodha City, Pakistan

2020 ◽  
Vol 71 (8) ◽  
pp. 240-248
Author(s):  
Kafeel Ahmad ◽  
Yongjun Yang ◽  
Zafar Iqbal Khan ◽  
Nimra Arshad ◽  
Tasneem Ahmad ◽  
...  
Keyword(s):  
Heavy Metal ◽  
Atomic Absorption ◽  
Blood Sample ◽  
Analysis Of Variance ◽  
Atomic Absorption Spectrophotometer ◽  
Metal Analysis ◽  
Heavy Metal Analysis

The article is focused on estimation of Zinc in the roadside forages, and blood of buffaloes feeding on these forages. This study was carried out in Sargodha during December 2015 to January 2016 (winter) and May 2016 to June 2016 (summer). Five road sites (Mateela, Faisalabad roadside, Shaheenabad roadside, Bhalwal roadside and 50 chak) were selected from sampling of forages, soil and buffalo blood sample. Heavy metal analysis of all digested samples was done with atomic absorption spectrophotometer. Analysis of variance and correlation was done with two way ANOVA. This study regarding the accumulation of zinc in forages, soil and the buffalo blood would help the authorities to exactly determine the agents which are responsible for increasing pollution in the environment.

Determination of metals of low concentration in high purity copper by atomic absorption spectrophotometry

1975 ◽  
Vol 63 (1) ◽  
pp. 107-116 ◽  
Author(s):  
Katalin Z. Balla ◽  
Etelka G. Hars�nyi ◽  
L�szl� P�los ◽  
Ern� Pungor
Keyword(s):  
Atomic Absorption ◽  
High Purity ◽  
Atomic Absorption Spectrophotometry ◽  
Low Concentration ◽  
Absorption Spectrophotometry ◽  
Purity Copper

Determination of cadmium in cosmetics from Kermanshah, Iran by graphite furnace atomic absorption spectrometry

2017 ◽  
Vol 41 (20) ◽  
pp. 11948-11954 ◽  
Author(s):  
Toraj Ahmadi-Jouibari ◽  
Nazir Fattahi ◽  
Nezam Mirzaei ◽  
Kiomars Sharafi ◽  
Hamid Reza Ghafari
Keyword(s):  
Atomic Absorption Spectrometry ◽  
Atomic Absorption ◽  
High Performance ◽  
Graphite Furnace ◽  
Absorption Spectrometry ◽  
Graphite Furnace Atomic Absorption ◽  
Preconcentration Technique ◽  
Drop Flow

Continuous sample drop flow-based microextraction (CSDF-ME) combined with graphite furnace atomic absorption spectrometry (GFAAS) has been developed as a high-performance preconcentration technique for the determination of cadmium in cosmetic samples.

Use of a flow-injection sample manipulator as an interface between a "high-performance" liquid chromatograph and an atomic absorption spectrophotometer.

1981 ◽  
Vol 27 (9) ◽  
pp. 1546-1550 ◽  
Author(s):  
B W Renoe ◽  
C E Shideler ◽  
J Savory
Keyword(s):  
Atomic Absorption ◽  
Flow Injection ◽  
Metal Binding ◽  
High Performance ◽  
Atomic Absorption Spectrophotometry ◽  
Clinical Samples ◽  
High Performance Liquid Chromatograph ◽  
Liquid Chromatograph ◽  
Flame Atomic Absorption ◽  
Column Eluate

Abstract We describe an integrated, molecular-absorbance, atomic absorption instrument for studying metal/ligand binding in clinical samples. For an interface between the "high-performance" liquid chromatograph and the atomic absorption instrument we used a flow-injection sample manipulator, thus allowing both the chromatograph and the atomic absorption detector to operate at their separate optimum conditions. After specimen separation with a gel permeation column, we measured the molecular components of the column eluate by molecular absorbance spectrometry and the atomic components (calcium and magnesium) by flame atomic absorption spectrophotometry. This instrument system is capable of separating and analyzing multiple components within 20 min of injection of the sample on the column. The chromatograms presented demonstrate the utility of the system for investigating metal binding to a variety of ligands in clinical samples.

scholarly journals Studi Penurunan Kadar Logam Besi (Fe) dan Logam Tembaga (Cu) pada Air Embung Menggunakan Adsorben Nanosilika

2017 ◽  
Vol 17 (2) ◽  
pp. 131
Author(s):  
Emas Agus Prastyo Wibowo ◽  
Ika Sri Hardyanti ◽  
Isni Nurani ◽  
Dyan Septyaningsih Hardjono HP ◽  
Aden Dhana Rizkita
Keyword(s):  
Heavy Metals ◽  
Heavy Metal ◽  
Atomic Absorption ◽  
Water Use ◽  
Metal Content ◽  
Atomic Absorption Spectrophotometer ◽  
Absorption Method ◽  
Wastewater Purification ◽  
Stirring Time ◽  
Independent Variable

STUDI PENURUNAN KADAR LOGAM BESI (Fe) DAN LOGAM TEMBAGA (Cu) PADA AIR EMBUNG MENGGUNAKAN ADSORBEN NANOSILIKAABSTRAKPolusi limbah logam berat dalam air merupakan satu permasalahan lingkungan yang penting. Dalam mengatasi permasalahan tersebut dapat dilakukan purifikasi terhadap air tersebut. Metode yang dapat digunakan untuk purifikasi limbah sangat beragam salah satunya adalah absorpsi. Secara umum metode absorpsi telah banyak digunakan dalam purifikasi air limbah. Metode absorpsi dapat menurunkan kadar logam yang terlarut pada limbah. cair dengan cara menyerap logam-logam tersebut ke dalam permukaan absorbennya. Tujuan dilakukan penelitian ini adalah  untuk menurunkan konsentrasi logam besi (Fe) dan tembaga (Cu) menggunakan adsorben nanosilika. Penelitian ini menggunakan variabel bebas yaitu waktu pengadukan (20 menit, 40 menit, dan 60 menit). Hasil akhir filtrat air embung kemudian diukur absorbansinya menggunakan Spektrofotometer Serapan Atom. Berdasarkan hasil analisa menggunakan instrumen SSA diperoleh hasil bahwa tidak terjadi penurunan logam Fe maupun Cu. Dalam hal ini terjadi peningkatan konsentrasi dalam logam Fe maupun Cu, hal ini dikarenakan kurangnya waktu pengadukan dan pengaruh dari adsorben nanosilika.Kata Kunci: limbah, logam berat, nanosilika STUDY OF DECREASING METALS IRON (Fe) AND COPPER (Cu) ON EMBUNG WATER USE OF NANOSILICA ADSORBEN ABSTRACTHeavy waste pollution of heavy metals in the water is an important environment issue. To solve the problem, its can be purified the water. The methods that can be used for waste purification are very diverse, one of which is absorption. In general, the method of absorption has been widely used in wastewater purification. The absorption method can decrease dissolved metal content in the waste. liquid by absorbing the metals into the absorbent surface. Research has been conducted to reduce the concentration of iron (Fe) and copper (Cu) by using nanosilica adsorbent. This research used to independent variable that is stirring time (20 minutes, 40 minutes, and 60 minutes). The final result of filtrate embung water then measured its absorbance using Atomic Absorption Spectrophotometer (AAS). Based on the result of the analysis using SSA instrument, it is found that there is no decrease of Fe and Cu metals. There are several reasons for those problem such as due to lack of stirring time and the influence of nanosilica adsorbent.Keywords: Waste pollution, heavy metal, nanosilica

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