scholarly journals Synthesis and Analytical Study of New Chelating Resin Containing Sulfadiazine Drug

2010 ◽  
Vol 7 (3) ◽  
pp. 1095-1100 ◽  
Author(s):  
Madher N. Abdulla
Keyword(s):  
Room Temperature ◽  
Analytical Study ◽  
Treatment Time ◽  
Chelating Resin ◽  
Loading Capacity

A new chelating resin was prepared by mixing sulfadiazine drug and TMP (trimethylolphenol). It was polymerized by heating to 90°C then it was post cured to 100°C after that it was grinded. The chelating behavior was examined against Cu2+, Ni2+using patch method in deferent conditions like treatment time and pH at room temperature. The resin show a good loading capacity toward Cu2+(in treatment time = 3 h & pH=4) = 0.2174 mg ion / 100 mg resin and it show good loading capacity toward Ni2+(in treatment time = 24 h & pH=4) = 0.14 mg ion / 100 mg resin.

scholarly journals Synthesis Characterization and Analytical Applications of New Chelating Resin of Formaldehyde-condensed Phenolic Schiff base.

2018 ◽  
Vol 31 (2) ◽  
pp. 97
Author(s):  
Khalida Abas Omran ◽  
Shayma Omran Lafta
Keyword(s):  
Schiff Base ◽  
Benzoic Acid ◽  
Room Temperature ◽  
Treatment Time ◽  
Amorphous Structure ◽  
Chelating Resin ◽  
Loading Capacity ◽  
Pendant Group ◽  
The Third ◽  
Ft Ir

  A new chelating phenolic Schiff base containing phthalate imide pendant group resin was synthesized by three steps. The first step includes synthesis of 2-(4-aminobiphenyl-4-ylcarbamoyl) benzoic acid (1), Via reaction of pthalic anhydride with benzidine. In the second lines, the compound that we obtained in the first step was reacted with o-hydroxybenzaldehyde to obtain phenolic Schiff base 2-(4'-(2-hydroxybenzylideneamino) bephenyl-4-yl carbamoyl) benzoic acid (2) The third step includes prepared resin during intensification Schiff base derived with formaldehyde inan alkaline middle. Thepthale amice acid, Schiff base and resin were characterized by various instrumental techniques like FT-IR, 1HNMR ,13CNMR and elemental analysis, thermal behavior of the polymer was investigated by DSC and TGA.SEM analysis of polymer shows the amorphous structure of polymer. The chelating behaviors was examined against Ni (ᴨ), Cd (ᴨ), Cr(ш)and Pb(ᴨ). using patch method in different conditions like treatment time and pH at room temperature. The resin shows a good loading capacity

Surface analytical study of uranium exposed to low pressures of hydrogen at ∼ 80°C

2012 ◽  
Vol 1444 ◽  
Author(s):  
Robert M. Harker ◽  
Afiya H. Chohollo
Keyword(s):  
Room Temperature ◽  
Analytical Study ◽  
Treatment Cycle ◽  
X Ray Diffraction ◽  
Standard Samples ◽  
X Ray ◽  
Surface Precipitation ◽  
Pre Treatment ◽  
Low Pressures ◽  
Scanning Electron

ABSTRACTIdentical samples of uranium coupons were prepared and each exposed to hydrogen for different times (where this time is significantly less than a classically understood ‘induction time’). Samples were prepared from rolled depleted uranium stock: as-received oxide was removed on all surfaces and two faces (~12x12 mm) were polished to a sub-micron standard. Samples were individually taken through a Vacuum Thermal Pre-Treatment cycle from room temperature to 200°C to the reaction temperature (80°C) over 40 hours and subsequently exposed to 10 mbar O2 for 24 hours. After O2 was removed, the samples were exposed to hydrogen for pre-determined times of up to 48 minutes. Examination of the samples by Scanning Electron Microscopy (SEM) has, as expected, identified small features protruding from the surface believed to have been caused by sub-surface precipitation of UH3. In general these features are circular and isolated from each other, have a diameter of less than 3μm and appear as either ‘flat-topped’ or ‘domed’ morphology. In addition, longer time exposure samples show a predominance of ‘area attack’ where coalesced sub-surface precipitation appears to be confined to particular metal grains. X-Ray Diffraction (XRD) data show an increase in the quantity of UH3 with time.

The Study of Effects of Temperature on Contact Strengths of Thick-Walled Cellular Solids

2010 ◽  
Vol 160-162 ◽  
pp. 1233-1238
Author(s):  
Fang Xie ◽  
Zuo Min Liu
Keyword(s):  
Room Temperature ◽  
Testing Machine ◽  
Hydraulic Testing ◽  
Experimental Results ◽  
Loading Capacity ◽  
Cellular Solids ◽  
Contact Strength ◽  
Effects Of Temperature

In order to investigate the effects of temperature on the contact strengths of the thick-walled cellular solids, materials of H59 brass was chosen for the preparation of cylindrical specimens which contain single pore, double pores, three pores and four pores respectively. The contact strengths of these specimens were determined in a YE-600 hydraulic testing machine at 20°C (room temperature) and 300°C respectively. The experimental results show that: the temperature had great effect on contact strength of the thick-walled cellular solids, mainly reflected in loading capacity and deformation, when the temperature increased from 20°C to 300°C, the loading capacity of the solids were reduced by 10.94 to 14.85% and the corresponding deformations were increased by 97.50 to 108.33%, which depended on the micro-pores structures. Furthermore, the effects of temperature on cracks out-look mainly reflected in cracks deepening with temperature. When the temperature increased from 20°C to 300°C, the depth of the cracks increased about 78 to 110%, which also depended on the micro-pores structures. However, temperature had little effect on the initiating position of the cracks for all micro-pores structures discussed from 20°C to 300°C.

The Study of Effects of Temperature on Contact Strengths of Thick-Walled Cellular Solids

2010 ◽  
Vol 160-162 ◽  
pp. 353-358
Author(s):  
Fang Xie ◽  
Zuo Min Liu
Keyword(s):  
Room Temperature ◽  
Testing Machine ◽  
Hydraulic Testing ◽  
Experimental Results ◽  
Loading Capacity ◽  
Cellular Solids ◽  
Contact Strength ◽  
Effects Of Temperature

In order to investigate the effects of temperature on the contact strengths of the thick-walled cellular solids, materials of H59 brass was chosen for the preparation of cylindrical specimens which contain single pore, double pores, three pores and four pores respectively. The contact strengths of these specimens were determined in a YE-600 hydraulic testing machine at 20°C (room temperature) and 300°C respectively. The experimental results show that: the temperature had great effect on contact strength of the thick-walled cellular solids, mainly reflected in loading capacity and deformation, when the temperature increased from 20°C to 300°C, the loading capacity of the solids were reduced by 10.94 to 14.85% and the corresponding deformations were increased by 97.50 to 108.33%, which depended on the micro-pores structures. Furthermore, the effects of temperature on cracks out-look mainly reflected in cracks deepening with temperature. When the temperature increased from 20°C to 300°C, the depth of the cracks increased about 78 to 110%, which also depended on the micro-pores structures. However, temperature had little effect on the initiating position of the cracks for all micro-pores structures discussed from 20°C to 300°C.

Rejuvenation Heat Treatment and Weld Repairability Studies of HAYNES® 230® Alloy

2000 ◽  
Author(s):  
Dwaine L. Klarstrom ◽  
Gregory L. Hoback ◽  
Venkat R. Ishwar ◽  
Javaid I. Qureshi
Keyword(s):  
Heat Treatment ◽  
Room Temperature ◽  
Treatment Time ◽  
Stress Rupture ◽  
Haynes 230 ◽  
Gas Tungsten Arc ◽  
Transverse Tensile ◽  
Stress Rupture Properties ◽  
Service Exposure ◽  
Rupture Properties

A series of studies were undertaken to determine the optimum rejuvenation heat treatment of HAYNES 230 alloy and to examine its weld repairability. To simulate service exposure, samples of plate nominally 4.75 mm (0.187 in.) thick were exposed at temperatures of 760°C (1400°F) and 871°C (1600°F) for a period of 1500 hours. Room temperature tensile properties and stress-rupture properties at 927°C (1700°F)/62 Mpa (9 ksi) were determined and compared to the material in the unexposed condition. Rejuvenation heat treatments of exposed materials were performed at a temperature of 1177°C (2150°F) for times of 30 minutes to 3 hours followed by a rapid air cool. In all cases, the room temperature tensile and the stress-rupture properties were found to be comparable to those for the unexposed condition. Based on these data, a heat treatment time of 30 minutes was judged to be adequate. Plates representing the as-received, exposed, and exposed and rejuvenated conditions were gas tungsten arc welded (GTAW) using 230-W™ filler metal. Transverse tensile samples containing the weldments were tested at room temperature, and face and root weldment samples were bent around an approximate 2T radius. All of the results, including those for the exposed condition, were found to meet the requirements of Section IX of the ASME Boiler and Pressure Vessel Code.

Fatigue Property of High-Strength Carbon Steel Deformed by Repetitive Side Extrusion Process

2005 ◽  
Vol 475-479 ◽  
pp. 245-248 ◽  
Author(s):  
Koshiro Aoki ◽  
Akira Azushima ◽  
Yoshiyuki Kondo
Keyword(s):  
Heat Treatment ◽  
Carbon Steel ◽  
Room Temperature ◽  
Lateral Pressure ◽  
Treatment Time ◽  
Fatigue Property ◽  
High Strength ◽  
Extrusion Process ◽  
Ultrafine Grained ◽  
Better Than

The development of an ultrafine grained carbon steel during repetitive shear deformation of side extrusion and the properties after heat treatment were investigated. Side extrusions were carried out at room temperature and the used material was 0.50% carbon steel. The repetitive side extrusions with a constant lateral pressure were carried out up to 3 passes without rotation. The specimens of these steels after 3 passes were annealed at a constant temperature of 600°C changing the treatment time. After side extrusion and heat treatment, the fatigue property was better than that of the as-received material.

Einfluss der verzögerten Transportdauer bei Raumtemperatur auf die Rate der falsch negativen Blutkulturen im BACTEC™ 9000 Gerät. Impact of delayed entry at room temperature on the rate of false negative blood cultures with the BACTEC™ 9000 instrument

2005 ◽  
Vol 29 (2) ◽  
Author(s):  
Anne-Marie Fahr ◽  
Ulrich Eigner ◽  
Pramod M. Shah
Keyword(s):  
Room Temperature ◽  
Treatment Time ◽  
False Negative ◽  
Blood Cultures ◽  
Species Level ◽  
Microbiology Laboratory ◽  
Delayed Entry ◽  
Media Type ◽  
Positive Rate ◽  
Time To Detection

AbstractOne hospital-based laboratory and one laboratory serving a number of hospitals prospectively studied 3.907 blood culture bottles of the BACTEC™ 9000 System (BD Diagnostics, Heidelberg, Germany) (1.888 aerobic bottles, 1.880 anaerobic bottles and 139 pediatric bottles). Information on media type, blood volume, time of inoculation, entry into the system, anti-microbial treatment, time to detection, identification to the species level and positive rate compared to terminal subculture were recorded and analysed.Twenty-seven bottles were classified as false negative, seven of these had a positive cohort bottle (The rate of clinically relevant false negative blood cultures (pathogen not detected in cohort bottle) in bottles that were entered into BACTEC 9000 within 48 h after inoculation is 0,15%. All efforts need to be directed towards expediting the transportation of material to the microbiology laboratory.

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