Showing 941 - 960 results of 22,558 for search 'detection sampling', query time: 0.20s Refine Results
  1. 941

    Sensitive Determination of Terazosin in Pharmaceutical Formulations and Biological Samples by Ionic-Liquid Microextraction Prior to Spectrofluorimetry by Mohsen Zeeb, Mahdi Sadeghi

    Published 2012-01-01
    “…An efficient and environmentally friendly sample preparation method based on the application of hydrophobic 1-Hexylpyridinium hexafluorophosphate [Hpy][PF6] ionic liquid (IL) as a microextraction solvent was proposed to preconcentrate terazosin. …”
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  2. 942

    Assessment of vortex assisted-supramolecular based micro-extraction for analysis of malachite green in water samples by Tahereh Sarhadi, Mashaallah Rahmani

    Published 2024-12-01
    “…The method showed excellent efficiency, with extraction recovery exceeding 97 %, highlighting its potential for analyzing samples. The calibration curve was found to be linear across the 10–500 ng mL−1 range with a limit of detection of 2.4 ng mL−1. …”
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  3. 943

    Investigation of directly suspended droplet micro extraction method for extraction of trihalomethane and halomethane in water samples by Seyed Kamal Rajabi, Ahmad Nikserasht

    Published 2018-06-01
    “…Simple and efficient directly suspended droplet micro extraction (DSDME) in conjunction with gas chromatography-electron capture detector (GC-ECD) has been developed for extraction and determination of Halomethane and Trihalomethane from water samples. In this technique a micro drop of n-hexane is delivered to the surface of an aqueous sample while being agitated by a stirring bar in the bulk of solution. …”
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  4. 944

    Flow-Batch Sample Preparation for Fractionation of the Stress Signaling Phytohormone Salicylic Acid in Fresh Leaves by Thiago L. Marques, Milton K. Sasaki, Lidiane C. Nunes, Fábio R. P. Rocha

    Published 2020-01-01
    “…The proposed procedure is directly applicable to plant leaves containing up 16 mg kg−1 SA, with a limit of detection of 0.1 mg kg−1 of SA, coefficient of variation of 3.0% (n = 10), and sampling rate of 4 samples h−1. …”
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  5. 945

    Transmission electron microscopy sample preparation protocols for the ultrastructural study of cysts of free-living protozoa by Ellen Lambrecht, Julie Baré, Myriam Claeys, Natascha Chavatte, Wim Bert, Koen Sabbe, Kurt Houf

    Published 2015-04-01
    “…Here we report on the design and testing of four protocols for TEM sample preparation of cysts. Two protocols, one based on chemical fixation in coated well plates and one on high-pressure freezing, were selected as the most effective for TEM-based ultrastructural studies of cysts. …”
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  6. 946

    Neighborhood Disadvantage and Genetic Testing Use Among a Nationally Representative Sample of US Adults by Jemar R. Bather, Melody S. Goodman, Kimberly A. Kaphingst

    Published 2025-05-01
    “…To address this knowledge gap, we analyzed data on a national sample of US adults to evaluate whether higher neighborhood vulnerability is significantly associated with lower genetic testing utilization, controlling for sociodemographic and health characteristics. …”
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  7. 947

    Evaluation of the Role of Some microRNAs in Corona Virus-19 Infection in Sample of Iraqi Patients by Hussam AL-WAELY, Saife AL-AHMER

    Published 2024-06-01
    “…Objectives: The study involving 20 SARS CoV patients found that elevated microRNA levels, specifically miR-23a overexpression and miR-195-F1gene downregulation, could serve as potential diagnostic factors for COVID-19 infections, potentially aiding in early detection. Materials and Methods: 20 patients suffered from coronavirus (SARS CoV) (Patient group) and ten samples of healthy persons (control group). …”
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  8. 948

    A New Monohydrogen Phosphate-Selective Carbon Composite Membrane Electrode for Soil Water Samples by Ozlem Tavukcuoglu, Vildan Erci, Fatih Ciftci, Ibrahim Isildak, Muhammed Zahid Kasapoglu

    Published 2025-03-01
    “…The electrode was applied to surface and soil water samples. The results obtained from the water samples showed a strong correlation with those obtained from the preferred spectrophotometry method, highlighting the potential of the developed electrode for on-site and continuous monitoring of phosphate and offering an efficient and practical solution for various fields that require phosphate detection.…”
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  9. 949

    Development and validation of a spectrophotometric method for the quantification of total bufadienolides in samples of toad glandular secretions by Elcio Daniel Sousa Barros, Evaldo dos Santos Monção Filho, Mariana Helena Chaves, Cícero Alves Lopes Júnior, Gerardo Magela Vieira Júnior

    Published 2025-05-01
    “…The total bufadienolide content in PGS extracts from 12 samples of R. diptycha ranged from 478 to 801 mg of EqMB/g of extract, while the R. granulosa sample presented 661 mg of EqMB/g of extract. …”
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  10. 950

    Miniaturized sample preparation strategies for the determination of N-nitrosamines in pharmaceutical products: A comprehensive review by Almir Custodio Batista Junior, Yuri Arrates Rocha, Andrea Rodrigues Chaves

    Published 2025-12-01
    “…In response, miniaturized sample preparation techniques have emerged as sustainable alternatives, offering reduced solvent usage, minimal sample requirements, and lower energy consumption, all while maintaining analytical performance. …”
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  11. 951

    Quantification of Enterovirus RNA in Sludge Samples Using Single Tube Real-Time RT-PCR by S. Monpoeho, A. Dehée, B. Mignotte, L. Schwartzbrod, V. Marechal, J.-C. Nicolas, S. Billaudel, V. Férré

    Published 2000-07-01
    “…We have developed a quantitative RTPCR method that can be used to determine the amount of enterovirus RNA in urban sludge samples. This method combines Taq-Man® technology with the ABI PrismTM 7700 real-time sequence detection system. …”
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  12. 952
  13. 953
  14. 954

    Protocol for reconstructing ancestral genomes from present-day samples by applying local ancestry inference by Xiaoxi Zhang, Baonan Wang, Jia Wen, Yang Gao, Yuwen Pan, Shuhua Xu

    Published 2025-03-01
    “…Summary: The genome of the most recent common ancestor is generally not available but can greatly facilitate the inference of demographic history and the detection of local adaptations. Here, we present a protocol for applying local ancestry inference in present-day samples to reconstruct ancestral genomes. …”
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  15. 955

    Causal association between periodontitis and oral cancer: a two-sample Mendelian randomization study by Ting Xiao, Ge Hu, Tian Li, Xiao Zhu, Hui Wang, Zhenhua Zhu

    Published 2025-05-01
    “…Complementary methods were used to detect and correct the effects of horizontal pleiotropy. …”
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  16. 956

    Evaluation of Xpert<sup>®</sup> Carba-R Assay Performance from FecalSwab™ Samples by Nicla Giovacchini, Chiara Chilleri, Ilaria Baccani, Eleonora Riccobono, Gian Maria Rossolini, Alberto Antonelli

    Published 2025-02-01
    “…<b>Background/Objectives</b>: The emergence and spread of carbapenemase-producing <i>Enterobacterales</i> (CPE) represents a significant challenge prompting the need to optimize diagnostic tools to detect CPE carriers. The Xpert<sup>®</sup> Carba-R assay (Cepheid, Sunnyvale, CA, USA), a Real-Time PCR-based test, can detect the <i>bla</i><sub>KPC</sub>, <i>bla</i><sub>VIM</sub>, <i>bla</i><sub>OXA-48</sub>, <i>bla</i><sub>NDM</sub> and <i>bla</i><sub>IMP</sub> carbapenemase genes directly from rectal swabs. …”
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  17. 957
  18. 958

    Diagnostic accuracy of human papillomavirus testing on self-collected samples among women referred for colposcopy by ChunX Yan, Jiong Ma, Xia Zheng, Jing Shu, XiaoJ Wang, XiaoY Chen, Feng Gao, XiaoQ Li, ShanQ M, LongM Huang, XiaoT Yu, XueJ Chen

    Published 2025-01-01
    “…The sensitivity and specificity of HPV detection for CIN2 + in urine, vaginal and cervical samples were 86.70% and 36.46%, 90.64% and 30.54%, 93.60% and 26.14%, respectively. …”
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  19. 959

    Assessment of TSPO Gene Expression Levels in Colorectal Cancer Tumors: A Paired Sample Study by Hamidreza Karami Gorji, Mehdi Karimi, Masoud Mortezazadeh, Niyousha Shirsalimi, Sheyda Akhshabi, Alireza Yousefi Ladmakhi, Mehdi Kashani, Seyyed Taher Seyyed Mahmoudi, Abbas Mofidi, Abolhasan Rezaei

    Published 2025-06-01
    “…ABSTRACT Background and Aim Colorectal cancer (CRC) is the second leading cause of cancer‐related deaths. Early detection through screening is crucial for improving treatment outcomes. …”
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  20. 960

    Driving Detection Based on the Multifeature Fusion by Qiufen Yang, Yan Lu

    Published 2022-01-01
    “…On the basis of blink, yawn and nod judgment, multiple characteristic values of blink frequency, yawn frequency, and nod frequency of drivers were extracted to establish a fatigue detection sample database, and a naive Bayes classifier was constructed to judge fatigue. …”
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