High performance photorefractive polymer with improved stability

1997 ◽  
Vol 70 (12) ◽  
pp. 1515-1517 ◽  
Author(s):  
A. Grunnet-Jepsen ◽  
C. L. Thompson ◽  
R. J. Twieg ◽  
W. E. Moerner
Keyword(s):  
High Performance ◽  
Improved Stability ◽  
Photorefractive Polymer

scholarly journals Development of One-Step Non-Solvent Extraction and Sensitive UHPLC-MS/MS Method for Assessment of N-(n-Butyl) Thiophosphoric Triamide (NBPT) and N-(n-Butyl) Phosphoric Triamide (NBPTo) in Milk

Molecules ◽  
2021 ◽  
Vol 26 (10) ◽  
pp. 2890
Author(s):  
Chikere G. Nkwonta ◽  
Macdara O’Neill ◽  
Niharika Rahman ◽  
Mary Moloney ◽  
Patrick J. Forrestal ◽  
...  
Keyword(s):  
Field Study ◽  
High Performance ◽  
Storage Temperature ◽  
Nitrous Oxide Emissions ◽  
Milk Samples ◽  
C Storage ◽  
Fortified Milk ◽  
Limit Of Quantitation ◽  
Improved Stability ◽  
Sensitivity Specificity

N-(n-butyl) thiophosphoric triamide (NBPT) is a urease inhibitor utilised in urea-based fertilizers. In Ireland, fertilizer treated with NBPT is applied to pasture to mitigate both ammonia and nitrous oxide emissions, but concerns arise as to the potential for residues in milk products. A quick ultrafiltration extraction and ultra-high performance liquid chromatography coupled with mass spectrometry triple quadrupole (UHPLC-MS/MS) quantitation method was developed and validated in this study. The method was applied in the analysis of samples collected from a field study investigating potential transfer of NBPT residues into milk. NBPT and NBPTo residues, were extracted from fortified milk samples and analysed on a UHPLC-MS/MS with recoveries ranging from 74 to 114%. Validation of the UHPLC-MS/MS method at low (0.0020 mg kg−1) and high (0.0250 mg kg−1) concentration levels in line with SANTE/12682/2019 showed overall trueness in the range of 99 to 104% and precision between 1 and 10%, RSD for both compounds. The limit of quantitation (LOQ) was 0.0020 mg kg−1 and other tested parameters (linearity, sensitivity, specificity, matrix effect, robustness, etc.) satisfied acceptance criteria. Stability assessment using spiked samples revealed the compounds were stable in raw and pasteurised milk for 4 weeks at –80 °C storage temperature. Maintaining samples at pH 8.5–9.0 further improved stability. Analysis of 516 milk samples from the field study found that NBPT and NBPTo concentrations were below the LOQ of 0.0020 mg kg−1, thus suggesting very low risk of residues occurring in the milk. The method developed is quick, robust, and sensitive. The method is deemed fit-for-purpose for the simultaneous determination of NBPT and NBPTo in milk.

scholarly journals High-Performance Lead-Acid Batteries Enabled by Pb and PbO2 Nanostructured Electrodes: Effect of Operating Temperature

2021 ◽  
Vol 11 (14) ◽  
pp. 6357
Author(s):  
Roberto Luigi Oliveri ◽  
Maria Grazia Insinga ◽  
Simone Pisana ◽  
Bernardo Patella ◽  
Giuseppe Aiello ◽  
...  
Keyword(s):  
High Performance ◽  
Active Material ◽  
Active Surface ◽  
Effect Of Temperature ◽  
Active Surface Area ◽  
Polycarbonate Membrane ◽  
Nanostructured Electrodes ◽  
Lead Acid Batteries ◽  
Improved Stability ◽  
Lead Acid

Lead-acid batteries are now widely used for energy storage, as result of an established and reliable technology. In the last decade, several studies have been carried out to improve the performance of this type of batteries, with the main objective to replace the conventional plates with innovative electrodes with improved stability, increased capacity and a larger active surface. Such studies ultimately aim to improve the kinetics of electrochemical conversion reactions at the electrode-solution interface and to guarantee a good electrical continuity during the repeated charge/discharge cycles. To achieve these objectives, our contribution focuses on the employment of nanostructured electrodes. In particular, we have obtained nanostructured electrodes in Pb and PbO2 through electrosynthesis in a template consisting of a nanoporous polycarbonate membrane. These electrodes are characterized by a wider active surface area, which allows for a better use of the active material, and for a consequent increased specific energy compared to traditional batteries. In this research, the performance of lead-acid batteries with nanostructured electrodes was studied at 10 C at temperatures of 25, −20 and 40 °C in order to evaluate the efficiency and the effect of temperature on electrode morphology. The batteries were assembled using both nanostructured electrodes and an AGM-type separator used in commercial batteries.

Directly grown high-performance WO3 films by a novel one-step hydrothermal method with significantly improved stability for electrochromic applications

2019 ◽  
Vol 7 (23) ◽  
pp. 13956-13967 ◽  
Author(s):  
Jianbo Pan ◽  
Yi Wang ◽  
Rongzhong Zheng ◽  
Maotong Wang ◽  
Zhongquan Wan ◽  
...  
Keyword(s):  
Synergistic Effect ◽  
Hydrothermal Method ◽  
High Performance ◽  
Cyclic Stability ◽  
Improved Stability ◽  
One Step

A high-performance WO3 electrochromic film with excellent cyclic stability was synthesized under the synergistic-effect of glycerol and (NH4)2SO4.

Improved stability of β-CsPbI3 inorganic perovskite using π-conjugated bifunctional surface capped organic cations for high performance photovoltaics

2020 ◽  
Vol 56 (89) ◽  
pp. 13816-13819
Author(s):  
Jie Zhang ◽  
Jinchao Liu ◽  
Aidong Tan ◽  
Jinhua Piao ◽  
Zhiyong Fu
Keyword(s):  
Solar Cells ◽  
High Performance ◽  
Organic Cations ◽  
Effective Strategy ◽  
High Reproducibility ◽  
Perovskite Layer ◽  
Inorganic Perovskite ◽  
Improved Stability

An effective strategy for stable and efficient β-CsPbI3 solar cells is developed via utilizing 2,3-NDAx+ capped inorganic perovskite layer. The corresponding PSC devices display a high reproducibility with a champion stabilized efficiency of 16.69%.

Silica coating enhances the stability of inorganic perovskite nanocrystals for efficient and stable down-conversion in white light-emitting devices

Nanoscale ◽  
2018 ◽  
Vol 10 (43) ◽  
pp. 20131-20139 ◽  
Author(s):  
Fei Zhang ◽  
Zhi-Feng Shi ◽  
Zhuang-Zhuang Ma ◽  
Ying Li ◽  
Sen Li ◽  
...  
Keyword(s):  
White Light ◽  
High Performance ◽  
Silica Coating ◽  
White Led ◽  
Light Emitting ◽  
Perovskite Nanocrystals ◽  
Light Emitting Devices ◽  
Improved Stability ◽  
The Stability ◽  
Down Conversion

CsPbBr3 QDs/silica composites with substantially improved stability were applied as the color-converting layer for high-performance white LED fabrication.

High-performance photorefractive polymer operating at 975nm

2004 ◽  
Vol 85 (7) ◽  
pp. 1095-1097 ◽  
Author(s):  
Muhsin Eralp ◽  
Jayan Thomas ◽  
Savaş Tay ◽  
Guoqiang Li ◽  
Gerald Meredith ◽  
...  
Keyword(s):  
High Performance ◽  
Photorefractive Polymer

High-performance photorefractive polymer operating at 1550 nm with near-video-rate response time

2005 ◽  
Vol 87 (17) ◽  
pp. 171105 ◽  
Author(s):  
Savaş Tay ◽  
Jayan Thomas ◽  
Muhsin Eralp ◽  
Guoqiang Li ◽  
Robert A. Norwood ◽  
...  
Keyword(s):  
Response Time ◽  
High Performance ◽  
Photorefractive Polymer

scholarly journals Improved Stability of a Stable Crystal Form C of 6S-5-Methyltetrahydrofolate Calcium Salt, Method Development and Validation of an LC–MS/MS Method for Rat Pharmacokinetic Comparison

Molecules ◽  
2021 ◽  
Vol 26 (19) ◽  
pp. 6011
Author(s):  
Zenglin Lian ◽  
Hong Chen ◽  
Kang Liu ◽  
Qianghua Jia ◽  
Feng Qiu ◽  
...  
Keyword(s):  
Liquid Chromatography ◽  
High Performance ◽  
Method Development ◽  
Calcium Salt ◽  
Crystal Form ◽  
Relative Bioavailability ◽  
Male Rats ◽  
Pharmacokinetic Parameters ◽  
Detection Analysis ◽  
Improved Stability

Folate is a vitamin beneficial for humans that plays an important role in metabolism, but it cannot be well supplemented by food; it is necessary to supplement it in other ways. Based on this consideration, a novel crystal form C of 6S-5-methyltetrahydrofolate calcium salt (MTHF CAC) was obtained. To explore the difference between MTHF CAC and the crystal form Ⅰ of 6S-5-methyltetrahydrofolate calcium salt (MTHF CA) as well as an amorphous product of 6S-5-methyltetrahydrofolate glucosamine salt (MTHF GA), their stability and pharmacokinetic behaviours were compared. The results of high-performance liquid chromatography coupled with ultraviolet detection analysis indicated that MTHF CAC showed a better stability than MTHF CA and MTHF GA. After oral administration of MTHF CAC, MTHF CA, and MTHF GA to male rats, the MTHF concentrations were analysed using a validated liquid chromatography–tandem mass spectrometry, and the pharmacokinetic parameters were compared. The mean residence times (0–t) of MTHF CAC, MTHF CA, and MTHF GA were 3.7 ± 1.9 h, 1.0 ± 0.2 h (p < 0.01), and 1.5 ± 0.3 h (p < 0.05), respectively. The relative bioavailability of MTHF CAC was calculated to be 351% and 218% compared with MTHF CA and MTHF GA, respectively, which suggests that MTHF CAC can be better absorbed and utilized for a longer period of time.

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