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#36485024   2022/12/09 To Up

Large-scale controlled coupling of single-photon emitters to high-index dielectric nanoantennas by AFM nanoxerography.

Improving the brightness of single-photon sources by means of optically resonant nanoantennas is a major stake for the development of efficient nanodevices for quantum communications. We demonstrate that nanoxerography by atomic force microscopy makes possible the fast, robust and repeatable positioning of model quantum nanoemitters (nitrogen-vacancy NV centers in nanodiamonds) on a large-scale in the gap of silicon nanoantennas with a dimer geometry. By tuning the parameters of the nanoxerography process, we can statistically control the number of deposited nanodiamonds, yielding configurations down to a unique single photon emitter coupled to these high index dielectric nanoantennas, with high selectivity and enhanced brightness induced by a near-field Purcell effect. Numerical simulations are in very good quantitative agreement with time-resolved photoluminescence experiments. A multipolar analysis reveals in particular all the aspects of the coupling between the dipolar single emitter and the Mie resonances hosted by these simple nanoantennas. This proof of principle opens a path to a genuine and large-scale spatial control of the coupling of punctual quantum nanoemitters to arrays of optimized optically resonant nanoantennas. It paves the way for future fundamental studies in quantum nano-optics and toward integrated photonics applications for quantum technologies.
Mélodie Humbert, Romain Hernandez, Nicolas Mallet, Guilhem Larrieu, Vincent Larrey, Frank Fournel, François Guérin, Etienne Palleau, Vincent Paillard, Aurélien Cuche, Laurence Ressier

2024 related Products with: Large-scale controlled coupling of single-photon emitters to high-index dielectric nanoantennas by AFM nanoxerography.

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#36485020   2022/12/09 To Up

Data Quality and Study Compliance Among College Students Across 2 Recruitment Sources: Two Study Investigation.

Models of satisficing suggest that study participants may not fully process survey items and provide accurate responses when survey burden is higher and when participant motivation is lower. Participants who do not fully process survey instructions can reduce a study's power and hinder generalizability. Common concerns among researchers using self-report measures are data quality and participant compliance. Similarly, attrition can hurt the power and generalizability of a study.
Abby L Braitman, Megan Strowger, Jennifer L Shipley, Jordan Ortman, Rachel I MacIntyre, Elizabeth A Bauer

1056 related Products with: Data Quality and Study Compliance Among College Students Across 2 Recruitment Sources: Two Study Investigation.

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#36484989   2022/12/01 To Up

Comparison of Clinical Study Results Reported in medRxiv Preprints vs Peer-reviewed Journal Articles.

Preprints have been widely adopted to enhance the timely dissemination of research across many scientific fields. Concerns remain that early, public access to preliminary medical research has the potential to propagate misleading or faulty research that has been conducted or interpreted in error.
Guneet Janda, Vishal Khetpal, Xiaoting Shi, Joseph S Ross, Joshua D Wallach

1728 related Products with: Comparison of Clinical Study Results Reported in medRxiv Preprints vs Peer-reviewed Journal Articles.



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#36484985   2022/12/01 To Up

Coverage and Equity of Childhood Vaccines in China.

Measuring vaccination coverage rates and equity is crucial for informing immunization policies in China.
Haijun Zhang, Xiaozhen Lai, Joshua Mak, Salin Sriudomporn, Haonan Zhang, Hai Fang, Bryan Patenaude

1662 related Products with: Coverage and Equity of Childhood Vaccines in China.

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#36484952   2022/12/09 To Up

Evaluation of the reliability, utility, and quality of the lid loading videos on YouTube.

It is aimed to determine the utility, reliability and quality of the lid loading videos on YouTube, a video sharing platform.
Ali Safa Balci, Kubra Şerefoglu Cabuk, Husna Topcu, Ayse Cetin Efe, Mehmet Goksel Ulas

1870 related Products with: Evaluation of the reliability, utility, and quality of the lid loading videos on YouTube.

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#36484913   2022/12/09 To Up

Abundance, distribution, and expression of nematicidal crystal protein genes in Bacillus thuringiensis strains from diverse habitats.

Bacillus thuringiensis (Bt) is a Gram-positive bacterium that accumulates pesticidal proteins (Cry and Cyt) in parasporal crystals. Proteins from the Cry5, App6 (formerly Cry6), Cry12, Cry13, Cry14, Cry21, and Xpp55 (formerly Cry55) families have been identified as toxic to nematodes. In this study, a total of 846 Bt strains belonging to four collections were analyzed to determine the diversity and distribution of the Bt Cry nematicidal protein genes. We analyzed their presence by PCR, and positives were confirmed by sequencing. As a result, 164 Bt isolates (20%) contained at least one gene coding for nematicidal Cry proteins. The cry5 and cry21 genes were enriched in collection 1 and were often found together in the same strain. Differently, in collection 4, obtained from similar habitats but after 10 years, cry14 was the gene most frequently found. In collection 2, cry5 and app6 were the most abundant genes, and collection 3 had a low incidence of any of these genes. The results point to high variability in the frequencies of the studied genes depending on the timing, geographical origins, and sources. The occurrence of cry1A, cry2, and cry3 genes was also analyzed and showed that the nematicidal Cry protein genes were frequently accompanied by cry1A + cry2. The expression of the genes was assessed by mass spectrometry showing that only 14% of the positive strains produced nematicidal proteins. To our knowledge, this is the first comprehensive screening that examines the presence and expression of genes from the seven known Bt Cry nematicidal families.
Yolanda Bel, Miguel Andrés-Antón, Baltasar Escriche

1659 related Products with: Abundance, distribution, and expression of nematicidal crystal protein genes in Bacillus thuringiensis strains from diverse habitats.

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#36484911   2022/12/09 To Up

In situ bioremediation of petroleum hydrocarbon-contaminated soil: isolation and application of a Rhodococcus strain.

Due to low consumption and high efficiency, in situ microbial remediation of petroleum hydrocarbons (PHs)-contaminated sites in in-service petrochemical enterprises has attracted more and more attention. In this study, a degrading strain was isolated from oil depot-contaminated soil with soil extract (PHs) as the sole carbon source, identified and named Rhodococcus sp. OBD-3. Strain OBD-3 exhibited wide adaptability and degradability over a wide range of temperatures (15-37 °C), pH (6.0-9.0), and salinities (1-7% NaCl) to degrade 60.6-86.6% of PHs. Under extreme conditions (15 °C and 3-7% salinity), PHs were degraded by 60.6 ± 8.2% and more than 82.1% respectively. In OBD-3, the alkane monooxygenase genes alkB1 and alkB2 (GenBank accession numbers: MZ688386 and MZ688387) were found, which belonged to Rhodococcus by sequence alignment. Moreover, strain OBD-3 was used in lab scale remediation in which the contaminated soil with OBD-3 was isolated as the remediation object. The PHs were removed at 2,809 ± 597 mg/kg within 2 months, and the relative abundances of Sphingobium and Pseudomonas in soil increased more than fivefold. This study not only established a system for the isolation and identification of indigenous degrading strains that could efficiently degrade pollutants in the isolated environment but also enabled the isolated degrading strains to have potential application prospects in the in situ bioremediation of PHs-contaminated soils.
Xin Chen, Guangbo Shan, Jiamin Shen, Feng Zhang, Yongdi Liu, Changzheng Cui

1419 related Products with: In situ bioremediation of petroleum hydrocarbon-contaminated soil: isolation and application of a Rhodococcus strain.

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#36484881   2022/12/09 To Up

Fluoride presence in drinking water along the southeastern part of El Bajío Guanajuatense, Guanajuato, Mexico: sources and health effects.

Drinking water with a high natural concentration of fluoride (F) has serious consequences for the health of the rural population in the state of Guanajuato, Mexico, where the water contains levels of F that are not allowed by national and international regulations (1.5 mg/L). This health problem is very common in multiple states throughout Mexico where drinking water is generally extracted from aquifers that are hosted in fractured volcanic rocks of the Tertiary. These aquifers show similar geological characteristics: deep basins that formed as a result of felsic eruptive events and the extensional deformation of the Basin and Range and are now filled with unconsolidated sediments. In this study, we assessed the occurrence of F in volcanic rocks collected at 11 sampling sites along the Sierra de Codornices in Guanajuato (ranging between 0.01299 and 0.146 wt%, average 0.039 wt%, and SD = 0.039 wt%; n = 10), a region where both rural and urban communities consume drinking water with a high F content (up to 7.1 (mg/L). The F content is dispersed in volcanic rocks, and the highest levels are present in felsic rocks. The statistical and hydrogeochemical results of a sampling campaign of 32 wells in the Juventino Rosas (JR) and Villagran (Vill) municipalities in 2019 suggest that F mobilization in groundwater is the product of silicate weathering and the dissolution of volcanic glass, alkaline desorption in the surfaces of F-containing minerals, and possibly ion exchange of minerals and clays or deep fluids enriched with F, in addition to the precipitation of carbonates that decrease the Ca concentration in groundwater. All of these processes can be accelerated by groundwater geothermal characteristics within the study area. The hydrogeochemical, fluoride exposure risk, and fluoride pollution index (FPI) results, as well as the epidemiological survey, indicate that teenagers and older adults from Praderas de la Venta are at risk of exposure to F due to the high concentrations ingested over a long period, the toxicity of the element, and its ability to accumulate in the bones. Extended exposure to elevated levels increases the risk. This work allows us to observe how the populations of JR and Vill can be exposed to high F contents in drinking water due to the geological characteristics of the region.
Jose Ivan Morales-Arredondo, Maria Aurora Armienta-Hernández, Angel Eduardo Lugo-Dorantes, Andrea Pamela Barrera-Arrazola, Itzamna Zaknite Flores-Ocampo, Ricardo Flores-Vargas

1341 related Products with: Fluoride presence in drinking water along the southeastern part of El Bajío Guanajuatense, Guanajuato, Mexico: sources and health effects.

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#36484871   2022/12/09 To Up

Fecal microbiota transplantation in childhood: past, present, and future.

Fecal microbiota transplantation (FMT) has been well described in the treatment of pediatric diseases; however, the latest updates regarding its use in children are unclear and the concepts involved need to be revisited.
Xu Gu, Zhao-Hong Chen, Shu-Cheng Zhang

2796 related Products with: Fecal microbiota transplantation in childhood: past, present, and future.

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#36484870   2022/12/09 To Up

Interhemispheric Integration after Callosotomy: A Meta-Analysis of Poffenberger and Redundant-Target Paradigms.

The central role of the corpus callosum in integrating perception and cognition across the cerebral hemispheres makes it highly desirable for clinical and basic research to have a repertoire of experimental paradigms assessing callosal functioning. Here, the objective was to assess the validity of two such paradigms (Poffenberger, redundant-target paradigms) by conducting single-step meta-analyses on individual case data of callosotomy patients. Studies were identified by systematic literature search (source: Pubmed and WebOfKnowledge, date: 07.03.2022) and all studies were included that reported callosotomy case data for either paradigm. Twenty-two studies (38 unique cases) provided 116 observations of the crossed-uncrossed difference (CUD) for the Poffenberger paradigm, while ten studies (22 cases, 103 observations) provided bilateral redundancy gain (bRG) measures. Using linear-mixed models with "individual" and "experiment" as random-effects variable, the mean CUD was estimated at 60.6 ms (CI: 45.3; 75.9) for commissurotomy, 43.5 ms (26.7; 60.2) for complete callosotomy, and 8.8 ms (1.1; 16.6) for partial anterior-medial callosotomy patients. The estimates of commissurotomy/callosotomy patients differed significantly from patients with partial callosotomy and healthy controls. The mean bRG (minimum unilateral reference) was estimated at 42.8 ms (27.1;58.4) for patients with complete and 30.8 ms (16.8; 44.7) for patients with partial callosotomy, both differing significantly from controls. One limitation was that different formulas for bRG were used, making it necessary to split the sample and reducing test power of some analyses. Nevertheless, the present findings suggest that both paradigms assess interhemispheric callosal integration, confirming their construct validity, but likely test distinct callosal functions.
René Westerhausen

1296 related Products with: Interhemispheric Integration after Callosotomy: A Meta-Analysis of Poffenberger and Redundant-Target Paradigms.

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