Crystallization of Rhenium Salts in a Simulated Low-Activity Waste Borosilicate Glass

2013 ◽  
Vol 96 (4) ◽  
pp. 1150-1157 ◽  
Author(s):  
Brian J. Riley ◽  
John S. McCloy ◽  
Ashutosh Goel ◽  
Martin Liezers ◽  
Michael J. Schweiger ◽  
...  
Keyword(s):  
Borosilicate Glass ◽  
Low Activity

scholarly journals Crystallization of rhenium salts in a simulated low‐activity waste borosilicate glass: Erratum

2021 ◽  
Vol 104 (6) ◽  
pp. 2908-2908
Author(s):  
Brian J. Riley ◽  
John S. McCloy ◽  
Ashutosh Goel ◽  
Martin Liezers ◽  
Michael J. Schweiger ◽  
...  
Keyword(s):  
Borosilicate Glass ◽  
Low Activity

scholarly journals Iodine solubility in a low-activity waste borosilicate glass at 1000°C

2014 ◽  
Vol 452 (1-3) ◽  
pp. 178-188 ◽  
Author(s):  
Brian J. Riley ◽  
Michael J. Schweiger ◽  
Dong-Sang Kim ◽  
Wayne W. Lukens ◽  
Benjamin D. Williams ◽  
...  
Keyword(s):  
Borosilicate Glass ◽  
Low Activity

Measurement of kinetic rate law parameters on a NaCaAl borosilicate glass for low-activity waste

1997 ◽  
Vol 249 (2-3) ◽  
pp. 175-189 ◽  
Author(s):  
B.P. McGrail ◽  
W.L. Ebert ◽  
A.J. Bakel ◽  
D.K. Peeler
Keyword(s):  
Borosilicate Glass ◽  
Kinetic Rate ◽  
Rate Law ◽  
Low Activity

Accelerated Testing of Waste forms using a Novel Pressurized Unsaturated flow (PUF) Method

1996 ◽  
Vol 465 ◽  
Author(s):  
B. P. McGrail ◽  
P. F. Martin ◽  
C. W. Lindenmeier
Keyword(s):  
Borosilicate Glass ◽  
Unsaturated Flow ◽  
Flow Behavior ◽  
Secondary Phase ◽  
Phase Precipitation ◽  
Barrier Materials ◽  
Batch Tests ◽  
Glass Corrosion ◽  
Waste Forms ◽  
Low Activity

ABSTRACTA new experimental technique has been developed to test waste forms and other proposed engineered-barrier materials under unsaturated conditions. Laboratory experiments using the pressurized unsaturated flow (PUF) apparatus have been performed with a Na-Ca-Al borosilicate glass being studied for immobilization of low-activity tank wastes and a reference borosilicate glass for immobilization of high-level wastes (SRL-202). A complex coupling between glass corrosion, secondary phase precipitation, and unsaturated flow behavior was observed. Precipitation of a family of Na-Ca-Al zeolites was also found to cause an acceleration in the reaction rate of the low-activity waste glass. This same effect was observed after approximately 1 year in high solid-to-liquid ratio batch tests but after only 12 days using the PUF method at the same temperature. The onset of secondary phase precipitation was tracked by monitoring changes in volumetric water content and by inline chemical analysis. Finally, elemental release of the major glass components and solution pH were found to differ under unsaturated flow-through conditions as compared with saturated, batch tests. These findings, while preliminary, have important implications for understanding and modeling glass corrosion behavior under unsaturated conditions.

Nanostructure of semiconductor quantum dots in a borosilicate glass matrix by complementary use of HREM and AEM

1990 ◽  
Vol 48 (4) ◽  
pp. 728-729
Author(s):  
M.J. Kim ◽  
L.C. Liu ◽  
S.H. Risbud ◽  
R.W. Carpenter
Keyword(s):  
Quantum Dots ◽  
Borosilicate Glass ◽  
Glass Matrix ◽  
Optical Switching ◽  
Response Times ◽  
Fast Response ◽  
Processing Technique ◽  
Internal Stresses ◽  
Electron Hole ◽  
Spatial Dimensions

When the size of a semiconductor is reduced by an appropriate materials processing technique to a dimension less than about twice the radius of an exciton in the bulk crystal, the band like structure of the semiconductor gives way to discrete molecular orbital electronic states. Clusters of semiconductors in a size regime lower than 2R {where R is the exciton Bohr radius; e.g. 3 nm for CdS and 7.3 nm for CdTe) are called Quantum Dots (QD) because they confine optically excited electron- hole pairs (excitons) in all three spatial dimensions. Structures based on QD are of great interest because of fast response times and non-linearity in optical switching applications.In this paper we report the first HREM analysis of the size and structure of CdTe and CdS QD formed by precipitation from a modified borosilicate glass matrix. The glass melts were quenched by pouring on brass plates, and then annealed to relieve internal stresses. QD precipitate particles were formed during subsequent "striking" heat treatments above the glass crystallization temperature, which was determined by differential thermal analysis.

A Comparison of the in Vitro and in Vivo Thrombogenic Activity of Factor IX Concentrates Using Stasis (Wessler) and Non-Stasis Rabbit Models

1980 ◽  
Vol 44 (02) ◽  
pp. 081-086 ◽  
Author(s):  
C V Prowse ◽  
A E Williams
Keyword(s):  
Platelet Rich Plasma ◽  
Thrombus Formation ◽  
Factor Ix ◽  
Coagulation System ◽  
In Vitro Tests ◽  
Clinical Use ◽  
Low Activity

SummaryThe thrombogenic effects of selected factor IX concentrates were evaluated in two rabbit models; the Wessler stasis model and a novel non-stasis model. Concentrates active in either the NAPTT or TGt50 in vitro tests of potential thrombogenicity, or both, caused thrombus formation in the Wessler technique and activation of the coagulation system in the non-stasis model. A concentrate with low activity in both in vitro tests did not have thrombogenic effects in vivo, at the chosen dose. Results in the non-stasis model suggested that the thrombogenic effects of factor IX concentrates may occur by at least two mechanisms. A concentrate prepared from platelet-rich plasma and a pyrogenic concentrate were also tested and found to have no thrombogenic effect in vivo.These studies justify the use of the NAPTT and TGt50 in vitro tests for the screening of factor IX concentrates prior to clinical use.

Separation of Heparin into Subtractions by DEAE-Cellulose Chromatography

1979 ◽  
Vol 42 (05) ◽  
pp. 1452-1459 ◽  
Author(s):  
Robert H Yue ◽  
Toby Starr ◽  
Menard M Gertler
Keyword(s):  
High Activity ◽  
Uronic Acid ◽  
Deae Cellulose ◽  
Exchange Chromatography ◽  
Net Charge ◽  
Uronic Acid Content ◽  
Successful Separation ◽  
Salt Gradient ◽  
Structure And Activity ◽  
Low Activity

SummaryCommercial porcine heparin can be separated into three distinct subtractions by using DEAE-cellulose chromatography and a stepped salt gradient. Gram quantities of heparin can be fractionated by this technique. All three heparin subtractions can accelerate the inhibition of thrombin by antithrombin III with different efficiency. The specific activities of the high activity heparin, intermediate activity heparin and low activity heparin are 228 units/mg, 142 units/mg and 95 units/mg, respectively. Both the uronic acid content and the quantity of N-SO4 for all three heparin subfractions have been evaluated. The high activity heparin has the lowest uronic acid and N-SO4 content. The successful separation of commercial heparin into three distinct subfractions by means of ion-exchange chromatography suggests that the net charge on these three heparin components will serve as a model system in the elucidation of the structure and activity relationship to the biological function of heparin.

PENERAPAN STRATEGI MENJAWAB SECARA BERGANTIANBERPOLA LINGKARAN ROUND ROBIN UNTUKMENINGKATKAN HASIL BELAJAR PPKn SISWA KELAS VISDN 002 UKUI DUA KECAMATAN UKUI

2016 ◽  
Vol 5 (1) ◽  
Author(s):  
Diyan Pertiwi
Keyword(s):  
Student Learning ◽  
Learning Outcomes ◽  
Sixth Grade ◽  
Student Learning Outcomes ◽  
Round Robin ◽  
Class Action ◽  
Sixth Grade Students ◽  
Teachers And Students ◽  
Improve Student Learning ◽  
Low Activity

This study is a class action that aims to improve learning outcomes in subjects PPKn sixth grade students of SDN 002 Ukui Dua. This research is motivated by the low activity and low teacher and student learning outcomes in subjects PPKn. The problem of this study is whether the implementation of a strategy to answer alternately patterned circle round robin can improve student learning outcomes in subjects PPKn in the sixth grade SDN 002 Ukui Dua? This PPKn was conducted over two cycles. Data collection techniques in this research using collection observation techniques, achievement test, and documentation. Techniques of analysis in this study is an analysis of the activities of teachers and students and learning outcomes in subjects PPKn sixth grade students SDN 02 Ukui Dua Kecamatant Ukui. The result showed that the activity of teachers has increased. At the first meeting of the first cycle of 41% was obtained with Simply Perfect category and the second meeting reached 55% with the category Fairly Perfect. In the second cycle 3 meeting to reach 75% by the Perfect category and the 4th meeting of the second cycle reaches 85% with the Perfect category. While the activity of students has increased. At the first meeting of the first cycle reaches 51% with the category Fairly Perfect and the second meeting with the percentage of 66% to the category Perfect. After the second cycle of the third meeting with a percentage of 75% with the Perfect category while in attendance for-4 with the percentage of 94% to the category of Most Perfect. Learning outcomes of students also increased from the previous students who achieve KKM only 8 votes with a percentage (45%) after the first cycle an increase in students worth over KKM which reached 14 people with a percentage of 70%. Cycle II students who achieve KKM 17 (85%).

Pool Boiling on a Surface Supplied by Low Activity Sites

1997 ◽  
Vol 28 (4-6) ◽  
pp. 255-258
Author(s):  
V. V. Privezentsev ◽  
A. V. Carzhavin
Keyword(s):  
Pool Boiling ◽  
Low Activity

The effects and mechanisms of acids on the health of piglets and weaners – a review

2020 ◽  
Vol 0 (0) ◽  
Author(s):  
Piotr Nowak ◽  
Anita Zaworska-Zakrzewska ◽  
Andrzej Frankiewicz ◽  
Małgorzata Kasprowicz-Potocka
Keyword(s):  
Digestive System ◽  
Buffer Capacity ◽  
Growth Parameters ◽  
Feed Additives ◽  
Feed Additive ◽  
Growth Promoters ◽  
Qualitative And Quantitative ◽  
Inorganic Acids ◽  
Low Activity ◽  
The Eu

AbstractThe rearing of piglets is the most difficult period in the pigs’ production because of their poorly developed digestive system and the low activity of digestive enzymes. Problems in nutrition and stress cause some disorders in the functioning of the digestive system leading to diarrhea and the mortality of piglets. Starting in 2006 in the EU, a total ban on antibiotics in their use as growth promoters was introduced. Since then, new and safe feed additives have been sought in order to replace antibiotics. Organic and inorganic acids as well as their salts were recognized as effective and safe additives. Due to their properties, they can improve feed palatability and digestibility, reduce the buffer capacity of feed, impact the development and functioning of the pig’s digestive system and improve the health and growth parameters. However, the effectiveness of acids is related to their qualitative and quantitative share in the feed additive. In this review, some strategies for using organic acids, their mixtures and also some new multi-component products will be discussed.

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