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#32473506   2020/05/08 To Up

Development of polyoxymethylene passive sampler for assessing air concentrations of PCBs at a confined disposal facility (CDF).

In this study, 76 μm polyoxymethylene (POM) strips were evaluated as a passive air sampler (PAS) for monitoring the volatile emissions from dredged material placed in confined disposal facilities (CDF). Laboratory evaluations were used to assess the uptake kinetics, average equilibrium time, and estimate the POM-air partition coefficients (K) of 16 PCB congeners. The uptake kinetics defined the effective averaging time for air sampling and ranged from about a week for dichlorobiphenyls to 2 weeks or more for tetra- and pentachlorobiphenyls at ∼20 °C under internal mass transfer resistance control which was applicable for Log K < 8. The measured Log K for PCBs ranged from 5.65 to 9.34 and exhibited an average deviation of 0.19 log unit from the theoretical value of K/K. The PAS approach was then tested with a preliminary field application (n = 17) at a CDF allowing equilibration over 42 days. The field application focused on lower congener PCBs as a result of the estimated increase in K and longer uptake times expected at the low ambient temperatures during the field study (average of 3.5 °C). Total PCB air concentrations around the CDF averaged 0.32 ng/m and varied according to proximity to placement of the dredged materials and predominant wind directions. Average PAS concentration of low congener number PCBs (15, 18, 20/28, 31) were compared to available high volume air sampler (HVAS) measurements. The PAS concentrations were within 20% of HVAS in the dominant north and south directions and showed similar trends as east and west HVAS samplers although PAS concentrations were as much as an order of magnitude below the west HVAS.
Adesewa A Odetayo, Danny D Reible, Damarys Acevedo-Mackey, Cynthia Price, Le Thai

1172 related Products with: Development of polyoxymethylene passive sampler for assessing air concentrations of PCBs at a confined disposal facility (CDF).

100ug Lyophilized100 ml100μl10reactions 5 mg0.1 mg100ul1x96 well plate 1 G200ul100μl

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#32472298   2020/05/30 To Up

Genome-wide miRNA profiling in plasma of pregnant women with down syndrome fetuses.

Down syndrome (DS) is one of the most common causes of intellectual disability and new approaches allowing its rapid and effective prenatal detection are being explored. In this study, we investigated the diagnostic potential of plasma microRNAs (miRNAs). This study builds upon our previous study in DS placentas, where seven miRNAs were found to be significantly up-regulated. A total of 70 first-trimester plasma samples from pregnant women were included in the present study (35 samples with DS fetuses; 35 with euploid fetuses). Genome-wide miRNA profiling was performed in the pilot study using Affymetrix GeneChip™ miRNA 4.1 Array Strips (18 samples). Selected miRNAs were then analysed in the validation study using quantitative reverse transcription PCR (RT-qPCR; 52 samples). Based on the current pilot study results (12 miRNAs), our previous research on chorionic villi samples (7 miRNAs) and the literature (4 miRNAs), a group of 23 miRNAs was selected for the validation study. Although the results of the pilot study were promising, the validation study using the more sensitive RT-qPCR technique and a larger group of samples revealed no significant differences in miRNA profiles between the compared groups. Our results suggest that testing of the first-trimester plasma miRNAs is probably not suitable for non-invasive prenatal testing (NIPT). Different results could be theoretically achieved at later gestational ages; however, such a result probably would have limited use in clinical practice.
Iveta Zedníková, Blanka Chylíková, Ondřej Šeda, Marie Korabečná, Eva Pazourková, Miroslav Břešťák, Miroslava Krkavcová, Pavel Calda, Aleš Hořínek

1564 related Products with: Genome-wide miRNA profiling in plasma of pregnant women with down syndrome fetuses.

100 μg96T1212

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#32466368   2020/05/26 To Up

Soldering Electronics to Smart Textiles by Pulsed Nd:YAG Laser.

Experts attest the smart textiles market will have high growth potential during the next ten years. Laser soldering is considered to be a good contacting method because it is a contactless process. For this reason, it is intended to investigate the contacting process of printed circuit boards (PCB) to isolated conductive textile strips by means of a ytterbium‑doped fiber laser (1064 nm). During the investigation, the copper strands in the textile tape were stripped by the laser and soldered to the PCB without any transport of the textile. Therefore, we investigated different sets of parameters by means of a design of experiment (DoE) for different types of solder pastes. Finally, the joinings were electrically analyzed using a contact resistance test, optically with a REM examination, and mechanically using a peeling test.
Sebastian Micus, Michael Haupt, Götz T Gresser

2954 related Products with: Soldering Electronics to Smart Textiles by Pulsed Nd:YAG Laser.

3 modules30 m Pcs Per Pack 1 G1 kit2.5 lt5 mg100 ul100 tests1 module200 ug1 moduleOne 96-Well Strip Micropl

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#32465758   2020/03/30 To Up

Heartmate III™ Implantation: A Novel Technique to Reduce the Incidence of Perioperative Bleeding and the Use of Intraoperative Blood Products.

We describe a method for implanting the Abbot HeartMate 3™ (HM3) Left Ventricular Assist Device (LVAD) that may reduce perioperative bleeding and the use of blood products.
N H Patel, D Meyer, R Gottlieb, C Guerrero-Miranda, S Hall, A K Jamil, J S van Zyl, J Felius, A Rafael

1676 related Products with: Heartmate III™ Implantation: A Novel Technique to Reduce the Incidence of Perioperative Bleeding and the Use of Intraoperative Blood Products.

100 extractions100.00 ul1 ml0.1 mg

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#32464068   2020/05/28 To Up

Safety and efficacy of endovascular implantation of a portal vein stent combined with iodine-125 seed-strips followed by transcatheter arterial chemoembolization with Sorafenib for the treatment of hepatocellular carcinoma with portal vein tumor thrombosis.

To assess the safety and efficacy of endovascular implantation of a portal vein stent combined with iodine- seed-strips followed by transcatheter arterial chemoembolization with sorafenib (PVS-I-TACE-S) for the treatment of hepatocellular carcinoma (HCC) with portal vein tumor thrombosis (PVTT).
Shuangxi Li, Lei Li, Baohua Li, Wenhui Wang

2248 related Products with: Safety and efficacy of endovascular implantation of a portal vein stent combined with iodine-125 seed-strips followed by transcatheter arterial chemoembolization with Sorafenib for the treatment of hepatocellular carcinoma with portal vein tumor thrombosis.

5 G

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#32463655   2020/05/28 To Up

Substantial Improvement of Oil Aerosol Filtration Performance using in-plane Asymmetric Wettability.

Oil aerosol usually causes air pollution, health issues, and corrosion to equipment. The removal of aerosol oil particles from the air is a crucial process in industrial production and daily life. Though fibrous filters have been a widely used material for the separation of oil aerosol from the air, it is still a challenge to separate submicron aerosol oil particles with both high filtration efficiency and low resistance. Herein we report a novel approach to markedly reducing the pressure drop of a fibrous filter and simultaneously increasing its aerosol filtration efficiency, only by surface treatment to make the filter have an in-plane alternating superoleophilic and superoleophobic pattern. We used a spraying method to prepare superoleophobic and superoleophilic patterns on the filter. The best filtration results were achieved when two layers of the patterned filters that have superoleophobic and superoleophilic strips (both width 5 mm) were stacked in a way that the opposite wetting surfaces were contacted each other between the layers. The filter showed much-reduced filtration resistance, the pressure drop (4.16 kPa) at pseudo-steady state being at least 45% lower when compared to the two-layer controls with a homogenous surface wettability (i.e., untreated surface, superoleophobicity, and superoleophilicity). It also showed higher filtration efficiency (98.37%) and over two times higher quality factor (0.99 kPa-1 for small oil mists and 2.27 kPa-1 for large oil mists). The asymmetric wettability leads to the formation of unobstructed channels for the air stream to penetration through the filter matrix, leading to low resistance with improved oil capture efficiency. The pattern strip width showed an effect on filtration performance. This unexpected finding may provide a novel approach to design high-performance, low energy consumption, and long-life coalescence filters.
Xin Wei, Yufeng Liu, Hua Zhou, Feng Chen, Hongxia Wang, Zhongli Ji, George G Chase, Tong Lin

1426 related Products with: Substantial Improvement of Oil Aerosol Filtration Performance using in-plane Asymmetric Wettability.

5 G

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#32459049   2020/05/27 To Up

'1984': what Orwell could not predict. Proteomic analysis of his scripts.

George Orwell, fighter for the Republican Army during the Spanish Civil War, was shot through the throat by a sniper on 20 May 1937 and nearly killed. After receiving only a summary external treatment, on the 29 he was cured in a Barcelona hospital where he was infected by the Koch bacillus. After fleeing from Spain on 23 June 1937, he repaired to his cottage in Wallington, Hertfordshire, wherefrom he wrote a letter to Sergey Dynamov, Editor of Soviet journal "Foreign Literature". This typewritten letter was analyzed by application of five EVA strips (ethylene vinyl acetate studded with strong cation and anion and with C and C resins; four on the corners and one over his signature), searching for biological traces. Upon elution of the captured biologicals, trypsin digestion and Orbitrap Fusion trihybrid mass spectrometer analyses, three of the five strips yielded clear traces of six unique proteins (via proteotypic peptides) of the tuberculosis bacterium. Additionally, MALDI TOF analysis of saliva of a tuberculosis patient and the EVA strip eluates gave a spectrum of 14 peptide bands (Mr 2700 to 6700 Da range) coincident between the two samples, thus fully confirming Orwell's pathology. These results are attributed to saliva traces on Orwell's fingertips and to the fact that the letter was written on 2 July 1937, when Orwell's pathology was at its peak. This article is protected by copyright. All rights reserved.
Yana Saravayskaya, Gleb Zilberstein, Roman Zilberstein, Svetlana Zilberstein, Uriel Maor, Alfonsina D'Amato, Pier Giorgio Righetti

1748 related Products with: '1984': what Orwell could not predict. Proteomic analysis of his scripts.

50 ug50ul1 module0.1ml (1mg/ml)48 assays 15 ml 50 ug100 ul1 module1 GALLON

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#32458144   2020/05/27 To Up

Unilateral acute anterior uveitis is associated with ipsilateral changes in the tear fluid proteome that involves the LXR/RXR pathway.

To determine whether unilateral acute anterior uveitis (AAU) induces ipsilateral changes in the tear fluid proteome.
Jon Roger Eidet, Øystein Kalsnes Jørstad, Ida G Fostad, Ole K Olstad, Ragnhild Ø Sørland, Morten C Moe, Goran Petrovski, Milaim Pepaj

1152 related Products with: Unilateral acute anterior uveitis is associated with ipsilateral changes in the tear fluid proteome that involves the LXR/RXR pathway.

11100ug Lyophilized100ug Lyophilized

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