Test Method for Determining the Stability and Miscibility of a Solid, Semi-Solid, or Liquid Waste Material

ABSTRACTProgress on separating the long-lived fission products from the high level radioactive liquid waste (HLW) has led to the development of specific host matrices, notably for the immobilization of cesium. Hollandite (nominally BaAl2Ti6O16), one of the main phases constituting Synroc, receives renewed interest as specific Cs-host wasteform. The radioactive cesium isotopes consist of short-lived Cs and Cs of high activities and Cs with long lifetime, all decaying according to Cs+→Ba2++e- (β) + γ. Therefore, Cs-host forms must be both heat and (β,γ)-radiation resistant. The purpose of this study is to estimate the stability of single phase hollandite under external β and γ radiation, simulating the decay of Cs. A hollandite ceramic of simple composition (Ba1.16Al2.32Ti5.68O16) was essentially irradiated by 1 and 2.5 MeV electrons with different fluences to simulate the β particles emitted by cesium. The generation of point defects was then followed by Electron Paramagnetic Resonance (EPR). All these electron irradiations generated defects of the same nature (oxygen centers and Ti3+ ions) but in different proportions varying with electron energy and fluence. The annealing of irradiated samples lead to the disappearance of the latter defects but gave rise to two other types of defects (aggregates of light elements and titanyl ions). It is necessary to heat at relatively high temperature (T=800°C) to recover an EPR spectrum similar to that of the pristine material. The stability of hollandite phase under radioactive cesium irradiation during the waste storage is discussed.

Download Full-text

Evaluation of Semi-Solid-State Fermentation of Elaeocarpus serratus L. Leaves and Black Soymilk by Lactobacillus plantarum on Bioactive Compounds and Antioxidant Capacity

Foods ◽

10.3390/foods10040704 ◽

2021 ◽

Vol 10 (4) ◽

pp. 704

Author(s):

Chia-Yu Tsui ◽

Chun-Yao Yang

Keyword(s):

Solid State ◽

Lactobacillus Plantarum ◽

Solid State Fermentation ◽

Nutritional Supplement ◽

Antioxidant Power ◽

Glucosidase Activity ◽

Fermented Product ◽

Ferric Reducing Antioxidant Power ◽

Semi Solid ◽

The Stability

Elaeocarpus serratus L. leaves (EL) containing phenolic compounds and flavonoids, including myricitrin with pharmacological properties, could be valorized as nutritional additive in foods. In this study, the semi-solid-state fermentation of EL and black soymilk (BS) by Lactobacillus plantarum BCRC 10357 was investigated. Without adding EL in MRS medium, the β-glucosidase activity of L. plantarum quickly reduced to 2.33 ± 0.15 U/mL in 36 h of fermentation; by using 3% EL, the stability period of β-glucosidase activity was prolonged as 12.94 ± 0.69 U/mL in 12 h to 13.71 ± 0.94 in 36 h, showing positive response of the bacteria encountering EL. Using L. plantarum to ferment BS with 3% EL, the β-glucosidase activity increased to 23.78 ± 1.34 U/mL in 24 h, and in the fermented product extract (FPE), the content of myricitrin (2297.06 μg/g-FPE) and isoflavone aglycones (daidzein and genistein, 474.47 μg/g-FPE) at 48 h of fermentation were 1.61-fold and 1.95-fold of that before fermentation (at 0 h), respectively. Total flavonoid content, myricitrin, and ferric reducing antioxidant power in FPE using BS and EL were higher than that using EL alone. This study developed the potential fermented product of black soymilk using EL as a nutritional supplement with probiotics.

Download Full-text

Formulation and Stability Test of Lip Cream Preparation of Kenop Flower Ethanol Extract (Gomphrena globosa L.)

Journal of Pharmacological Research and Developments ◽

10.46610/jprd.2021.v03i02.008 ◽

2021 ◽

Vol 3 (2) ◽

Author(s):

Mevi Irianti Tonapa ◽

Rani Dewi Pratiwi ◽

Elsye Gunawan

Keyword(s):

Ph Value ◽

Ethanol Extract ◽

Stability Test ◽

Gomphrena Globosa ◽

Homogeneous Composition ◽

Semi Solid ◽

The Stability ◽

Ph Range ◽

Average Dispersion ◽

Brown Color

Kenop Flower (Gomphrena globosa L.) is used in the manufacture of lip cream because contains betacyanin pigments that function as color pigments. This study aims to determine the physical quality and stability of the lip cream preparation of the ethanol extract of kenop flower (Gomphrena globosa L.). This research was conducted experimentally, including the manufacture of lip cream formulations with ethanol extract of kenop flower (Gomphrena globosa L.) with a concentration of 10%. The results of the physical examination test for lip cream preparations for all preparations have a distinctive vanilla aroma with a semi-solid texture, F0 has ivory white color and F1-F3 has a brown color. The preparations had a homogeneous composition, average pH 6-7, had good greasing power, 5.0-5.8 average dispersion and 60.33-66.67 seconds average adhesion. The stability test carried out on day 28 found that all preparations were stable, had a distinctive vanilla aroma with a semi-solid texture, F0 had ivory white color and F1-F3 had a brown color. The preparation has a homogeneous composition; the average pH is 6-7. Where the lip cream formulas F1 and F3 decreased the pH value on the 28th day from 7 to 6 but tended to be stable and in the pH range that matched the lip pH. And there is no phase separation in all formulas.

Download Full-text

Multi-sensor data fusion based on consistency test and sliding window variance weighted algorithm in sensor networks

Computer Science and Information Systems ◽

10.2298/csis110617004s ◽

2013 ◽

Vol 10 (1) ◽

pp. 197-214 ◽

Cited By ~ 6

Author(s):

Jian Shu ◽

Ming Hong ◽

Wei Zheng ◽

Li-Min Sun ◽

Xu Ge

Keyword(s):

Sensor Networks ◽

Internal Noise ◽

Sliding Window ◽

Test Method ◽

Sensor Data ◽

Data Simulation ◽

Consistency Test ◽

Multi Sensor Data Fusion ◽

Weighted Algorithm ◽

The Stability

In order to solve the problem that the accuracy of sensor data is reducing due to zero offset and the stability is decreasing in wireless sensor networks, a novel algorithm is proposed based on consistency test and sliding-windowed variance weighted. The internal noise is considered to be the main factor of the problem in this paper. And we can use consistency test method to diagnose whether the mean of sensor data is offset. So the abnormal data is amended or removed. Then, the result of fused data can be calculated by using sliding window variance weighted algorithm according to normal and amended data. Simulation results show that the misdiagnosis rate of the abnormal data can be reduced to 3% by using improved consistency test with the threshold set to [0.05, 0.15], so the abnormal sensor data can be diagnosed more accurately and the stability can be increased. The accuracy of the fused data can be improved effectively when the window length is set to 2. Under the condition that the abnormal sensor data has been amended or removed, the proposed algorithm has better performances on precision compared with other existing algorithms.

Download Full-text

Semi-Solid Pharmaceutical Formulations for the Delivery of Papain Nanoparticles

Pharmaceutics ◽

10.3390/pharmaceutics12121170 ◽

2020 ◽

Vol 12 (12) ◽

pp. 1170

Author(s):

Caroline S. A. de Lima ◽

Justine P. R. O. Varca ◽

Kamila M. Nogueira ◽

Gabriela N. Fazolin ◽

Lucas F. de Freitas ◽

...

Keyword(s):

Biomedical Applications ◽

Drug Loading ◽

Pharmaceutical Formulations ◽

Poly Vinyl Alcohol ◽

Protein Distribution ◽

Cytotoxicity Studies ◽

Enzyme Distribution ◽

Gel Preparation ◽

Semi Solid ◽

The Stability

Papain is a therapeutic enzyme with restricted applications due to associated allergenic reactions. Papain nanoparticles have shown to be safe for biomedical use, although a method for proper drug loading and release remains to be developed. Thus, the objective of this work was to develop and assess the stability of papain nanoparticles in a prototype semi-solid formulation suitable for dermatological or topical administrations. Papain nanoparticles of 7.0 ± 0.1 nm were synthesized and loaded into carboxymethylcellulose- and poly(vinyl alcohol)-based gels. The formulations were then assayed for preliminary stability, enzyme activity, cytotoxicity studies, and characterized according to their microstructures and protein distribution. The formulations were suitable for papain nanoparticle loading and provided a stable environment for the nanoparticles. The enzyme distribution along the gel matrix was homogeneous for all the formulations, and the proteolytic activity was preserved after the gel preparation. Both gels presented a slow release of the papain nanoparticles for four days. Cell viability assays revealed no potential cytotoxicity, and the presence of the nanoparticles did not alter the microstructure of the gel. The developed systems presented a potential for biomedical applications, either as drug delivery systems for papain nanoparticles and/or its complexes.

Download Full-text