Search results for: Extraction
#33098628 // To Up
Evaluating the Impact of Central Venous Catheter Materials and Design on Thrombosis: A Systematic Review and Meta-Analysis.Thrombosis is a common complication associated with central venous catheter (CVC) insertion. Several antithrombogenic materials and alterations to catheter design have been developed to lower thrombosis rates.
Eugene Slaughter, Kathryn Kynoch, Megan Brodribb, Samantha J Keogh
1603 related Products with: Evaluating the Impact of Central Venous Catheter Materials and Design on Thrombosis: A Systematic Review and Meta-Analysis.10 mg1000 TESTS/0.65ml100ug25 mg1000 tests100ug200ul100 mg10 mg100ul200ug
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#33098563 2020/10/24 To Up
Antibiotic and antiparasitic residues in surface water of urban rivers in the Red River Delta (Hanoi, Vietnam): concentrations, profiles, source estimation, and risk assessment.Antibiotic residues and antimicrobial resistance in surface water are issues of global concern, especially in developing countries. In this study, the occurrence of seven antibiotics and one antiparasitic agent was determined in surface water samples collected from four rivers running through Hanoi urban area in the Red River Delta, northern Vietnam. The pharmaceuticals in water samples were analyzed by solid-phase extraction combined with liquid chromatography-tandem mass spectrometry method. The concentrations of pharmaceuticals in our samples ranged from 3050 to 16,700 (median 7800) ng/L, which were generally higher than levels found in river water from many other locations in the world. Amoxicillin, oxfendazole, and lincomycin were the most dominant and frequently detected compounds (detection rate 100%), which together accounted for 76 ± 14% of total concentrations. Sulfacetamide and sulfamethoxazole were detected at moderate concentrations in more than two-thirds of the analyzed samples. The remaining antibiotics (i.e., azithromycin, ciprofloxacin, and ofloxacin) were found at lower detection frequency and concentrations. Antibiotic concentrations in the water samples were not significantly different between the investigated rivers. Meanwhile, levels of pharmaceuticals in the samples collected in February 2020 were higher than those found in the remaining samples, largely due to the sharp decrease in sulfamethoxazole and azithromycin concentrations of the samples collected in March and April. Considerable ecological risks of antibiotics in surface water were estimated for some compounds such as amoxicillin, ciprofloxacin, and ofloxacin.
Nhu Da Le, Anh Quoc Hoang, Thi Thu Ha Hoang, Thi Anh Huong Nguyen, Thi Thuy Duong, Thi Mai Huong Pham, Tien Dat Nguyen, Van Chung Hoang, Thi Xuan Binh Phung, Huu Tuyen Le, Cao Son Tran, Thu Hien Dang, Ngoc Tu Vu, Trong Nghia Nguyen, Thi Phuong Quynh Le
1923 related Products with: Antibiotic and antiparasitic residues in surface water of urban rivers in the Red River Delta (Hanoi, Vietnam): concentrations, profiles, source estimation, and risk assessment.25 ml. 100ul 100ul 100ul 100ul150μl 100ul 100ul
#33098456 2020/10/24 To Up
Differential analysis of FA-NNC, PCA-MLR, and PMF methods applied in source apportionment of PAHs in street dust.Many source apportionment models have been applied to identify pollution sources, and differences often exist in the diagnostic results. The reasons causing these differences have not been fully elucidated. In this study, three receptor models, principal component analysis-multiple linear regression (PCA-MLR), positive matrix factorization (PMF), and factor analysis-nonnegative constraints (FA-NNC), were compared and applied for the analysis of 16 EPA priority polycyclic aromatic hydrocarbons (PAHs) adsorbed in street dust samples from Harbin City (China). The differences in the results were caused by different calculation approaches, including matrix decomposition, variable grouping extraction, and nonnegative constraints, especially between PCA-MLR and the other two models. PCA-MLR has no nonnegative constraints, making PCA-MLR less similar to the real world than the other two. Both PMF and FA-NNC have a nonnegative constraint process, which may be the main reason why their results were much more similar to each other than to those of PCA-MLR. PCA-MLR distinguishes variables into several groups that have the greatest variances from each other, whereas the other two methods find similarities among variables and extract them. In the case study of Harbin City, the contributions of mobile and industrial sources ranged from 47 to 69%, and the contributions of coal and other sources ranged from 30 to 52%. The recognized types of pollution sources were generally equivalent, but the proportional contributions were different. PCA-MLR performed best in calculating contributions, whereas PMF and FA-NNC were better in terms of source diagnosis.
Jiashen Feng, Ningning Song, Yanxin Yu, Yingxia Li
2164 related Products with: Differential analysis of FA-NNC, PCA-MLR, and PMF methods applied in source apportionment of PAHs in street dust.50ul 100ul 100ul 100ul50ul 100ul 100ul50ul100ug 100ul 100ul 100ul
#33098427 2020/10/24 To Up
Rapid and extraction-free detection of SARS-CoV-2 from saliva by colorimetric reverse-transcription loop-mediated isothermal amplification.Rapid, reliable, and widespread testing is required to curtail the ongoing COVID-19 pandemic. Current gold standard nucleic acid tests are hampered by supply shortages in critical reagents including nasal swabs, RNA extraction kits, personal protective equipment, instrumentation, and labor.
Matthew A Lalli, S Joshua Langmade, Xuhua Chen, Catrina C Fronick, Christopher S Sawyer, Lauren C Burcea, Michael N Wilkinson, Robert S Fulton, Michael Heinz, William J Buchser, Richard D Head, Robi D Mitra, Jeffrey Milbrandt
1660 related Products with: Rapid and extraction-free detection of SARS-CoV-2 from saliva by colorimetric reverse-transcription loop-mediated isothermal amplification.2x96 well plates2x96 well plate100tests96 wells (1 kit)10 mg2x96 well plate2 x 96 well plate200ul100tests
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#33098383 2020/10/12 To Up
Effect of Human Testicular Cells Conditioned Medium on Maturation and Morphology of Mouse Oocytes.Testicular cell conditioned medium (TCCM) has been shown to induce female germ cell development from embryonic stem cells (ESCs). Testicular cells (TCs) secrete a variety of growth factors such as growth differentiation factor-9 (GDF-9), bone morphogenetic protein 4 (BMP-4), stem cell factor (SCF), leukemia inhibitory factor (LIF), and other, that could improve oocyte maturation. Here we have investigated the effect of human TCCM (hTCCM) on maturation (IVM) and morphology of mouse oocytes.
Maryam Adib, Seyed Morteza Seifati, Mahmood Dehghani Ashkezari, Fatemeh Akyash, Arezoo Khoradmehr, Behrouz Aflatoonian
2051 related Products with: Effect of Human Testicular Cells Conditioned Medium on Maturation and Morphology of Mouse Oocytes.25 0.5 ml1 mL25 100.00 ug25 TESTS200 200 25 200 200 0.5 ml
#33098354 2020/10/16 To Up
Analysis of food samples made easy by microextraction technologies directly coupled to mass spectrometry.Because of the complexity and diversity of food matrices, their chemical analysis often entails several analytical challenges to attain accurate and reliable results, especially for multiresidue analysis and ultratrace quantification. Nonetheless, microextraction technology, such as solid-phase microextraction (SPME), has revolutionized the concept of sample preparation for complex matrices because of its nonexhaustive, yet quantitative extraction approach and its amenability to coupling to multiple analytical platforms. In recent years, microextraction devices directly interfaced with mass spectrometry (MS) have redefined the analytical workflow by providing faster screening and quantitative methods for complex matrices. This review will discuss the latest developments in the field of food analysis by means of microextraction approaches directly coupled to MS. One key feature that differentiates SPME-MS approaches from other ambient MS techniques is the use of matrix compatible extraction phases that prevent biofouling, which could drastically affect the ionization process and are still capable of selective extraction of the targeted analytes from the food matrix. Furthermore, the review examines the most significant applications of SPME-MS for various ionization techniques such as direct analysis in real time, dielectric barrier desorption ionization, and some unique SPME geometries, for example, transmission mode SPME and coated blade spray, that facilitate the interface to MS instrumentation.
Emanuela Gionfriddo, German Augusto Gómez-Ríos
2562 related Products with: Analysis of food samples made easy by microextraction technologies directly coupled to mass spectrometry.1 module1 module1 module1 module1 module1 module1 module1 module2 modules2 modules1 module1 module
#33098061 2020/10/23 To Up
Does Variability Affect the Performance of Front-Face Fluorescence Spectroscopy? A Study Case on Commercial Lebanese Olive Oil.T
Omar H Dib, Jad Rizkalah, Rita Yaacoub, Hussein Dib, Nathalie Locquet, Luc Eveleigh, Christophe B Y Cordella, Ali Bassal
2817 related Products with: Does Variability Affect the Performance of Front-Face Fluorescence Spectroscopy? A Study Case on Commercial Lebanese Olive Oil.1 kit
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#33098054 2020/10/24 To Up
How Bad Is "Bad"? A Cost Consideration and Review of Laparoscopic Gastric Plication Versus Laparoscopic Sleeve Gastrectomy.Recent large-scale studies have concluded that laparoscopic sleeve gastrectomy (LSG) is superior to laparoscopic gastric greater curve plication (LGP) in weight loss outcomes and post-operative complications, but LGP is still being performed due to its purported financial advantage. Our analysis provides an investigation of cost at the time of operation, and a consideration of the financial implications of the complications and percentage of reoperation associated with each procedure.
Daniel F Suarez, Antonio Gangemi
2293 related Products with: How Bad Is "Bad"? A Cost Consideration and Review of Laparoscopic Gastric Plication Versus Laparoscopic Sleeve Gastrectomy.100ug Lyophilized100 ul100ug Lyophilized100ug Lyophilized5 mg100ug Lyophilized100ug Lyophilized100ug Lyophilized100ug Lyophilized100ug Lyophilized100 ug100ug Lyophilized
#33098006 2020/10/23 To Up
Prevalence of adenomyosis in endometrial cancer patients: a systematic review and meta-analysis.Several studies have assessed the histological co-existence of endometrial carcinoma (EC) and adenomyosis. However, the significance of this association is still unclear.
Antonio Raffone, Renato Seracchioli, Diego Raimondo, Manuela Maletta, Antonio Travaglino, Ivano Raimondo, Ilaria Giaquinto, Benedetta Orsini, Luigi Insabato, Massimiliano Pellicano, Fulvio Zullo
1056 related Products with: Prevalence of adenomyosis in endometrial cancer patients: a systematic review and meta-analysis.
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