A Simultaneous Derivatization of 3-Monochloropropanediol and 1,3-Dichloropropane with HexamethyldisilazaneeTrimethylsilyl Trifluoromethanesulfonate at Room Temperature for Efficient Analysis of Food Sample Analysis

2016 ◽  
Author(s):  
Bai Lee ◽  
Che Wan Jasimah Wan Mohamed Radzi ◽  
Sook Mei Khor
Keyword(s):  
Room Temperature ◽  
Food Sample ◽  
Sample Analysis ◽  
Food Sample Analysis

A case study to determine the geographical origin of unknown GM papaya in routine food sample analysis, followed by identification of papaya events 16-0-1 and 18-2-4

2016 ◽  
Vol 213 ◽  
pp. 536-544 ◽  
Author(s):  
Theo W. Prins ◽  
Ingrid M.J. Scholtens ◽  
Arno W. Bak ◽  
Jeroen P. van Dijk ◽  
Marleen M. Voorhuijzen ◽  
...  
Keyword(s):  
Geographical Origin ◽  
Food Sample ◽  
Sample Analysis ◽  
Food Sample Analysis

Nanomaterials as sorbents for food sample analysis

2016 ◽  
Vol 85 ◽  
pp. 203-220 ◽  
Author(s):  
Javier González-Sálamo ◽  
Bárbara Socas-Rodríguez ◽  
Javier Hernández-Borges ◽  
Miguel Ángel Rodríguez-Delgado
Keyword(s):  
Food Sample ◽  
Sample Analysis ◽  
Food Sample Analysis

Experimental Study of Dredged Sediment Sample Analysis and Solidification in Waterway Regulation Engineering

2014 ◽  
Vol 638-640 ◽  
pp. 1252-1256 ◽  
Author(s):  
Gui Lan Tao ◽  
Xiao Lin Shi ◽  
Chao Hua Jiang ◽  
Xing Guo Feng ◽  
Liang Shu
Keyword(s):  
Experimental Study ◽  
Unconfined Compressive Strength ◽  
Room Temperature ◽  
Construction Material ◽  
Standard Condition ◽  
Environment Protection ◽  
Dredged Sediment ◽  
Sample Analysis ◽  
Alternative Materials ◽  
Recycling Technique

How to treat dredged sediment is one of the main environmental problems and the recycling technique is the best way to deal with this problem. This paper deals with the feasibility of beach protection project alternative materials-dredged sand, applies cement and addition to solidify it. The components of dredged sediment and the physical properties were analyzed. Specimens with a designed mix ratio of the cement and dredged sediment were made by means of instant formation. The specimens were cured under standard condition and room temperature. The unconfined compressive strength of specimens were measured after curing for 7, 14 and 28 days. Using solidified dredged sediment as construction material has advantages of technology, economy and environment protection.

scholarly journals THE REACTION OF DIOXANE WITH HYDROGEN BROMIDE

1951 ◽  
Vol 29 (9) ◽  
pp. 785-789 ◽  
Author(s):  
A. B. Van Cleave ◽  
R. I. Blake
Keyword(s):  
Molecular Weight ◽  
Hydrobromic Acid ◽  
Room Temperature ◽  
Hydrogen Bromide ◽  
Intermediate Compound ◽  
Molecular Weight Determination ◽  
Sample Analysis ◽  
Ethylene Dibromide ◽  
Free Hydrogen ◽  
Oxonium Salt

Dioxane reacted slowly at room temperature with anhydrous, bromine free hydrogen bromide to form 2, 2′-dibromodiethyl ether as a principal product. The 2, 2′-dibromodiethyl ether was characterized by comparison with a known sample, analysis, molecular weight determination, and by conversion to divinyl ether which was subsequently brominated to yield 1, 1′, 2, 2′-tetrabromodiethyl ether. When refluxed with constant boiling hydrobromic acid 2, 2′-dibromodiethyl ether was partially converted to ethylene dibromide. An intermediate compound in the formation of 2, 2′-dibromodiethyl ether from dioxane and hydrogen bromide was isolated by solvent extraction using petroleum ether. Its properties indicated that it was probably an oxonium salt.

scholarly journals Aktivitas Antioksidan Bubuk Sargassum hystrix Selama Penyimpanan pada Suhu Berbeda

2020 ◽  
Vol 40 (3) ◽  
pp. 175
Author(s):  
Pingkan Mayestika Afgatiani ◽  
Amir Husni ◽  
Siti Ari Budhiyanti
Keyword(s):  
Antioxidant Activity ◽  
Water Content ◽  
Room Temperature ◽  
Storage Time ◽  
Storage Temperature ◽  
Total Phenol ◽  
Gas Chromatography Mass Spectrometry ◽  
Sample Analysis ◽  
Ic50 Value ◽  
Before And After

The aim of this study was to determine the effect of storage temperature on the antioxidant activity of Sargassum hystrix. Samples were collected from Sepanjang Beach Gunung Kidul, Yogyakarta, and dried, pulverized, and then stored for two months at room temperature (17-33 °C), refrigerator (4 °C) and freezer (-18°C). Furthermore, the samples were tested every two weeks to determine their water content, total phenol, DPPH, and FIC. Also, Gas Chromatography-Mass Spectrometry (GC-MS) analysis was performed for two months before and after storage. The results showed that the water content increased after treatments, along with storage time which ranges from 8.55 to 14.27 %. Total phenol before storage was 175.73 mg GAE/g extract, and freezing has the highest total phenol levels after storage which was 22.07 mg GAE/g extract. Also, DPPH testing showed S. hystrix has anIC50 value of 0.45 mg/mL, and refrigeration has the lowest IC50 value of 3.18 mg/mL. FIC test showed IC50 value of 1.44 mg/mL, and freezing has the lowest FIC IC50 value of 15.36 mg/mL. In addition, GC-MS sample analysis before storage detected 8 compounds with antioxidant activity of 86.96 %. After two months, they were detected at room temperature, refrigerator, and freezing which are 4, 3, and 8 compounds respectively.

Dependence of Intergranular Fracture on Boundary Topography and Cohesion

1973 ◽  
Vol 31 ◽  
pp. 150-151
Author(s):  
J. E. Doherty ◽  
A. F. Giamei ◽  
B. H. Kear ◽  
C. W. Steinke
Keyword(s):  
Grain Boundary ◽  
Room Temperature ◽  
Nickel Base Superalloy ◽  
Boundary Shear ◽  
Room Temperature Ductility ◽  
Solid Solution Matrix ◽  
Nickel Base ◽  
Solution Matrix ◽  
Different Levels ◽  
Base Superalloy

Recently we have been investigating a class of nickel-base superalloys which possess substantial room temperature ductility. This improvement in ductility is directly related to improvements in grain boundary strength due to increased boundary cohesion through control of detrimental impurities and improved boundary shear strength by controlled grain boundary micros true tures.For these investigations an experimental nickel-base superalloy was doped with different levels of sulphur impurity. The micros tructure after a heat treatment of 1360°C for 2 hr, 1200°C for 16 hr consists of coherent precipitates of γ’ Ni3(Al,X) in a nickel solid solution matrix.

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