Pretreatment studies with biological and environmental materials

1978 ◽  
Vol 293 (2) ◽  
pp. 127-130 ◽  
Author(s):  
K. May ◽  
M. Stoeppler
Keyword(s):  
Environmental Materials

Use of191Pt radiotracer for the development of enrichment procedures to detect natural levels of platinum in biological and environmental materials

1994 ◽  
Vol 43-45 (1) ◽  
pp. 109-115
Author(s):  
M. Parent ◽  
R. Cornelis ◽  
F. Alt ◽  
K. Strijckmans ◽  
R. Dams
Keyword(s):  
Environmental Materials

Environmental materials

Physics Today ◽  
1973 ◽  
Vol 26 (1) ◽  
pp. 13-15
Author(s):  
John M. Fowler ◽  
Kathryn E. Mervine
Keyword(s):  
Environmental Materials

Effect of Environmental Materials on Aqueous Corrosion of R7T7 Glass

1988 ◽  
Vol 127 ◽  
Author(s):  
N. Godon ◽  
E. Vernaz ◽  
J. H. Thomassin ◽  
J. C. Touray
Keyword(s):  
Atmospheric Pressure ◽  
Test Results ◽  
Aqueous Corrosion ◽  
Environmental Material ◽  
Environmental Materials ◽  
Activated Bentonite ◽  
Order Of Magnitude ◽  
Glass Specimen ◽  
Icp Analysis ◽  
Glass Behavior

ABSTRACTR7T7 glass behavior was investigated in contact with eleven different materials including smectites, bentonites, illites, granite and sand. The experiments were conducted at 90°C under atmospheric pressure with a 4 cm−1 SA/V ratio using two grams of material in double distilled water under static leaching conditions without renewal of the leachate. For each material a control test was conducted under the same conditions but without the glass specimen, as well as a series of tests on glass alone, without the environmental material. Kinetics studies lasting up to 364 days were performed on four selected materials.The test results (mass loss, ICP analysis of the leachates, SEM and TEM observations) showed relatively slight glass alteration in contact with sand, granite and one bentonite (i.e. the same order of magnitude as glass alone in deionized water), but greater alteration of glass in contact with all the other clays.The significant differences in glass behavior in contact with environmental materials can be accounted for by the behavior of the latter in solution: activated bentonite releases very large amounts of silicon and sodium into solution while smectite seems to remove silicon from solution.

scholarly journals Studi Kelayakan Penuntun Praktikum Asam Basa Berbasis Bahan Lingkungan Menggunakan Model 3-D Dan Penerapan Metode Inkuiri Terbimbing Untuk Meningkatkan Hasil Belajar Siswa SMA Negeri 1 Tenga

2019 ◽  
Vol 1 (2) ◽  
pp. 40
Author(s):  
Gerry Lumolos ◽  
Dokri Gumolung ◽  
Joice Caroles
Keyword(s):  
Student Learning ◽  
Learning Outcomes ◽  
Base Material ◽  
Student Learning Outcomes ◽  
T Test ◽  
Guided Inquiry ◽  
Acid Base ◽  
Average Percentage ◽  
Environmental Materials ◽  
Improve Student Learning

Practicum guides are printed teaching materials that students can use in the learning process. This development research aims to determine the feasibility of an acid base-based practicum guide for environmental materials with a 3-D model and to improve student learning outcomes through practicum activities and the application of guided inquiry methods. The subject of this research was class XI IPA 1 at SMA Negeri 1 Tenga. The feasibility test for large groups has an average percentage of 88.24% which means that this practical guide is suitable for use with valid qualifications. Student learning outcomes using post test scores with the technique of statistical analysis of one sample t-test (one sample t-test). The results of the one-sample t-test hypothesis at a level of α = 5% were obtained tcount = 4.604> ttable = 1.708. The results of this study indicate that the guidelines for acid-base-based practicum for environmental materials are appropriate to be used in chemistry learning, and the use of acid-based practicum guides for environmental materials with the application of guided inquiry methods can improve student learning outcomes in acid-base material

scholarly journals Essay Environment in Indonesian Language Learning

2020 ◽  
Author(s):  
Afifah Tu Sahada
Keyword(s):  
Language Learning ◽  
Everyday Life ◽  
Environmental Material ◽  
Environmental Materials

Environmental materials make it easier for students to understand Indonesian material well, add to students 'insight, and can build students' ecological intelligence. Environmental material is material that is closely related to everyday life. Therefore, with environmental material the teacher can easilyfind relevant examples that make students better understand the material provided, so that it can help teachers imply Indonesian language material.

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