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Abdominal Pain and Soften Colitis Pursuing COVID-19 Disease: Report of the Circumstance.
CRISPR/Cas system have drawn increasing attention in accurate and sensitive nucleic acids detection. Herein, we reported a novel Cas12a-based electrochemiluminescence biosensor for target amplification-free human papilloma virus subtype (HPV-16) DNA detection. During this detection process, Cas12a employed its two-part recognition mechanism to improve the specificity and trans-cleavage capability to achieve signal amplification, while L-Methionine stabilized gold nanoclusters (Met-AuNCs) were served as high-efficiency ECL emitters to achieve ECL signal transition. Given the unique combination of Cas12a with ECL technique, the detection limit was determined as 0.48 pM and the whole detection could be completed within 70 min. We also validated the practical application of the proposed biosensor by using undiluted human blood samples, which gives impetus to the design of new generations of CRISPR/Cas detection system beyond the traditional ones with ultimate applications in sensing analysis and diagnostic technologies.Carbon dots (CDs)-based biosensors have attracted considerable interest in reliable and sensitive detection of microRNA (miRNA) because of their merits of ultra-small size, excellent biosafety and tunable emission, whereas complicated labeling procedure and expensive bioenzyme associated with current strategies significantly limit their practical application. Herein, we developed a label-free and enzyme-free fluorescence strategy based on strand displaced amplification (SDA) for highly sensitive detection of miRNA using sulfydryl-functionalized CDs (CDs-SH) as probe. CDs-SH displayed excellent response to G-quadruplex DNA against other DNAs based on based on the catalytic oxidation of -SH into -S-S- by hemin/G-quadruplex. Further, CDs-SH were employed to detect miRNA, using miRNA-21 as target model, which triggered the SDA reaction of P1 and P2 to generate hemin/G-quadruplex, subsequently making CDs-SH transform from dot to aggresome along with the quenched fluorescence. Therefore, label-free, enzyme-free, and highly sensitive analysis of miRNA-21 was readily acquired with a limit of detection at 0.03 pM. This proposed biosensor couples the advantages of CDs and label-free/enzyme-free strategy, and thus has a significant potential to be used in early and accurate diagnosis of cancer.Superior to anodic photoelectrochemical (PEC) method, cathodic bioanalysis integrates merits of excellent anti-interference and high stability, representing a promising and competitive methodology in precise monitoring targets in complex matrices. However, serious consideration of photocathode is far behind the anodic one, developing high-performance photocathode for PEC biosensing is thus urgently desired. Herein, a high-performance cathodic PEC aptasensing platform for detection of amyloid-beta oligomers (AβO) was constructed by integrating CuO/g-C3N4 p-n heterojunction with MoS2 QDs@Cu NWs multifunction signal amplifier. The CuO/g-C3N4, exhibiting intense visible light-harvesting and high photoelectric conversion efficiency, was synthesized by in-situ pyrolysis of Cu-MOF and dicyandiamide. The MoS2 QDs@Cu NWs was obtained by electrostatical self-assembly, which acted not only as a sensitizer to boost PEC response, but also as a nanozyme for biocatalytic precipitation. The aptasensor was fabricated by DNA hybridization between the cDNA on photocathode and MoS2 QDs@Cu NWs-labeled aptamer. Based on "on-off-on" photocurrent response generated by multifunction signal amplification, ultrasensitive aptasensing of AβO was realized in a wider linear range from 10 fM to 0.5 μM with an ultralow detection limit of 5.79 fM. The feasibility of the sensor for AβO determination in human blood serum was demonstrated.Climate change during the last 40 years has had a serious impact on agriculture and threatens global food and nutritional security. From over half a million plant species, cereals and legumes are the most important for food and nutritional security. Although systematic plant breeding has a relatively short history, conventional breeding coupled with advances in technology and crop management strategies has increased crop yields by 56 % globally between 1965-85, referred to as the Green Revolution. Nevertheless, increased demand for food, feed, fiber, and fuel necessitates the need to break existing yield barriers in many crop plants. In the first decade of the 21st century we witnessed rapid discovery, transformative technological development and declining costs of genomics technologies. In the second decade, the field turned towards making sense of the vast amount of genomic information and subsequently moved towards accurately predicting gene-to-phenotype associations and tailoring plants for climate resilience and global food security. In this review we focus on genomic resources, genome and germplasm sequencing, sequencing-based trait mapping, and genomics-assisted breeding approaches aimed at developing biotic stress resistant, abiotic stress tolerant and high nutrition varieties in six major cereals (rice, maize, wheat, barley, sorghum and pearl millet), and six major legumes (soybean, groundnut, cowpea, common bean, chickpea and pigeonpea). We further provide a perspective and way forward to use genomic breeding approaches including marker-assisted selection, marker-assisted backcrossing, haplotype based breeding and genomic prediction approaches coupled with machine learning and artificial intelligence, to speed breeding approaches. The overall goal is to accelerate genetic gains and deliver climate resilient and high nutrition crop varieties for sustainable agriculture.Technological developments and the increased use of the internet have created some risks for adolescents, including problematic internet gaming (PIG). The aim of this study is to investigate the role of age, gender, emotional dysregulation and perceived social support in PIG. The study was conducted with 1,291 adolescents. Participants completed the game addiction scale (GAS), difficulties in emotion regulation scale (DERS), and multidimensional scale of perceived social support (MSPSS) under the observation of their teachers. According to the results of the GAS, participants were divided into two groups those with PIG and those without PIG. The effect of age, gender, DERS scores, and MSPSS scores on PIG was investigated using stepwise logistic regression analysis. Merestinib The mean age of participants was 14.7 years and the frequency of PIG was 13.5% (n = 144). The frequency of PIG was significantly higher in males than in females. The results showed that male gender, high emotional dysregulation and low perceived social support were significantly associated with PIG.
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