Study of simulated HLW-glass leaching behavior under low oxygen repository condition

2006 ◽  
Vol 932 ◽  
Author(s):  
Zhang Hua ◽  
Luo Shanggeng
Keyword(s):  
Glass Surface ◽  
Diffraction Peak ◽  
Ambient Atmosphere ◽  
Low Oxygen ◽  
Secondary Products ◽  
Leaching Behavior ◽  
Geologic Disposal ◽  
Oxygen Condition ◽  
High Level ◽  
Glass Leaching

ABSTRACTMany countries have recognized vitrification as the suitable solidification method for conditioning high level radioactive waste before they are isolated from biosphere in geologic disposal. This paper studies the leaching behavior of a simulated HLW-glass (90Nd/10) under low oxygen repository condition during 1.5 years. The leaching results showed that the glass was corroded less under low oxygen condition than under ambient atmosphere. XRD analyses showed some little diffraction peak appeared on the leached glass surface at 150°C. At the same time, no diffraction peak appeared on the leached glass surface at 90°C. The secondary products formed on the surface of the leached glass contained mainly Si, Al, Ca and Fe.

scholarly journals Sequence Characterisation and Genotyping of Allelic Variants of Beta Casein Gene Establishes Native Cattle of Ladakh to be a Natural Resource for A2 Milk

2018 ◽  
Vol 3 (2) ◽  
pp. 177
Author(s):  
Monika Sodhi ◽  
R. S. Kataria ◽  
Saket K. Niranjan ◽  
Parvesh K. ◽  
Preeti Verma ◽  
...  
Keyword(s):  
Natural Resource ◽  
Bovine Milk ◽  
Human Consumption ◽  
Coding Region ◽  
Low Oxygen ◽  
Casein Gene ◽  
Allelic Distribution ◽  
Oxygen Condition ◽  
Beta Casein ◽  
Native Cattle

Bovine milk is regarded as nature's perfect food due to presence of vital nutrients. However some peptides are generated after proteolytic digestion of β-casein that have opioid properties and may increase the risk of chronic diseases. There are 13 genetic variants of bovine beta-casein; out of these A1 and A2 are the most common in dairy cattle breeds. The A1 and A2 variants differ only at position 67, which is histidine in A1 or proline in A2 milk. Earlier published reports have indicated that A1 β casein could be responsible for several health disorders like diabetes, coronary heart disease etc. while A2 β-casein is generally considered safe for human consumption. In the present study, an effort was made to sequence characterize β casein gene and identify allelic distribution of A1A2 alleles in native cattle of Ladakh region adapted to high altitude and low oxygen condition. The data showed 2 non-synonymous variations in coding region, while 5’UTR was completely conserved. The 3’UTR showed 2 more variations in Ladakhi samples. Further, the genotyping in 85 Ladakhi cattle for A1A2 alleles revealed that in Ladakhi cattle, A2 allele is predominantly present as reported for some of the other Indian breeds. The frequency of A2 allele was 0.90 and frequency of A2A2 genotype was found to be 0.79 in Ladakhi cattle. The present data strongly indicate that local cattle of Ladakh with higher frequency of A2 allele and A2A2 genotype is natural resource for A2 milk.  Systematic efforts should be made for long term conservation and genetic improvement of this invaluable genetic resource of Ladakh.

scholarly journals Tolerance of plum (Prunus domestica L.) fruits stored in low-oxygen atmosphere

2011 ◽  
Vol 31 (No. 1) ◽  
pp. 1-6
Author(s):  
J. Goliáš ◽  
A. Němcová ◽  
L. Šuderlová
Keyword(s):  
Ethanol Production ◽  
Production Rate ◽  
Storage Period ◽  
Final Concentration ◽  
Ambient Atmosphere ◽  
Prunus Domestica ◽  
Low Oxygen ◽  
Anaerobic Conditions ◽  
Storage Atmosphere ◽  
Ethanol Production Rate

Plum fruits of the cultivars Stanley and Valjevka picked at the beginning of climacteric were stored in different storage atmospheres for 31 days at 3&deg;C. The relations between the O<sub>2</sub> and CO<sub>2</sub> content during this period and after removal from the gas mixture to ethanol, acetaldehyde, non-volatile compounds and some textural values of fruits were investigated. Concentrations of ethanol in the flesh were related to levels of oxygen and CO<sub>2</sub> in ambient atmosphere. In anaerobic conditions (&lt; 0.2% O<sub>2</sub>) ethanol reached 1,109 mg/l for the cultivar Valjevka and 628 mg/l for Stanley. The results of single fruit analysis showed a steeply increasing concave curve of ethanol production in the period of anaerobic conditions, followed by the phase of a drop of the production rate in air stored fruit. The concentration of oxygen at a level of 0.9% (ultra low oxygen &ndash; ULO) does not physiologically harm the tissues of plums by producing mostly negligible content of ethanol and acetaldehyde, but an ethanol increase to half concentration after 31 days was observed to compare with anaerobic conditions in the cultivar Valjevka. From this aspect plums seem to be relatively sensitive to low oxygen. The post-storage period was extended up to 53 to 63 days, respectively. The senescence caused an increase in ethanol production rate that was exponentially increased after 20 days of cold storage atmosphere. The final concentration after 53 days was still higher for cv. Valjevka than for cv. Stanley at the respective content of 828 mg/land 498 mg/l. Skin firmness was differentiated for both cultivars, and softness was higher for the cultivar Valjevka. &nbsp;

scholarly journals In virto Propagation Response of Rosmarinus officinalis L. to Biotic and Abiotic Elicitors on Phenolic Content and Photosynthetic Pigments

2018 ◽  
Vol 10 (2) ◽  
pp. 301
Author(s):  
Hadeer Yahia Darwesh ◽  
Aisha Abdullah Alayafi
Keyword(s):  
Shoot Multiplication ◽  
Multiple Shoots ◽  
Rosmarinus Officinalis ◽  
Coconut Milk ◽  
Secondary Products ◽  
Number Of Leaves ◽  
Phenolics Content ◽  
Abiotic Elicitors ◽  
Rosmarinus Officinalis L ◽  
High Level

Micropropagation protocol was modified to evaluate the best procedure to induce multiple shoots from Rosmarinus officinalis L. sterilized seedlings obtained from seeds which vitality is always very low. Aseptic shoots (1-1.5 cm) were cultured on full strength Murashige and Skoog medium modified with several growth regulators (abiotic elicitors): Benzyladenine (BA), Kinetin (Kin) and coconut water (biotic elicitors). Data was indicated that BA at the concentration of 3 mg/L encouraged shoot multiplication. The highest number of leaves and plant length also was obtained with medium modified with 3 mg/L BA and coconut milk at 5 ml/L. All treatments were significantly different from the control. Total phenolics content, anthocyanins, chlorophylls were extracted and spectrophotometrically determined as secondary products. Data was concluded the highest content of phenolic 10.45 (mg/g) and chlorophyll b 0.67 (mg/g) when BA was 3.0 mg/L. Whereas chlorophyll a reached to 0.64 mg/g in presence of 5.0 mg/L BA and 5.0 ml/L coconut milk. Anthocyanin scored high level when BA was 3.0 mg/L combined with 5.0 ml/L coconut milk.

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