31,402 results match your criteria visual detection


Highly Selective and Sensitive Colorimetric and Fluorescent Chemosensors for Rapid Detection of Cyanide Anions in Aqueous Medium: Investigation on Supramolecular Recognition of Tweezer‑shaped Salophenes.

J Fluoresc 2021 May 8. Epub 2021 May 8.

Nano & Organic Synthesis Laboratory, Chemistry & Chemical Engineering Research Center of Iran, Pajoohesh Blvd., km 17, Karaj Hwy, 14968-13151, Tehran, Iran.

Three tweezer‑shaped salophenes having catechols (1), phenols (2) and anisoles (3) units in conjunction to the dipodal Schiff bases have been applied for the optical sensing of cyanide (CN¯) ions in CHCN-HO (7:3) as solvent of choice. Among them, compounds 1 and 2 recognized CN¯, relying on distinct color and spectral changes. They are easy-to-use probes that exhibit extremely high sensitivity (limit of detection = 1-10 nM), rapid response (5 s) and excellent selectivity. Read More

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Reproductive- and social-state plasticity of multiple sensory systems in a cichlid fish.

Integr Comp Biol 2021 May 7. Epub 2021 May 7.

Department of Biological Sciences, 202 Life Sciences Bldg., Louisiana State University, Baton Rouge, LA. 70803.

Intra- and inter-sexual communication is vital to the survival and reproductive success of animals. In species that cycle in and out of breeding or other physiological condition, sensory function can be modulated to optimize communication at crucial times. Little is known, however, about how widespread this sensory plasticity is across taxa, whether it occurs in multiple senses or both sexes within a species, and what potential modulatory substances and substrates are involved. Read More

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The state of the onion: Grammatical aspect modulates object representation during event comprehension.

Cognition 2021 May 4;214:104744. Epub 2021 May 4.

Max Planck Institute for Psycholinguistics, Nijmegen, the Netherlands; University of Amsterdam, the Netherlands.

The present ERP study assessed whether grammatical aspect is used as a cue in online event comprehension, in particular when reading about events in which an object is visually changed. While perfective aspect cues holistic event representations, including an event's endpoint, progressive aspect highlights intermediate phases of an event. In a 2 × 3 design, participants read SVO sentences describing a change-of-state event (e. Read More

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Ground and Stem Sampling as Potential Detection Tools for the Wool of Adelges tsugae (Hemiptera: Adelgidae).

J Econ Entomol 2021 May 7. Epub 2021 May 7.

Natural Resources Canada Canadian Forest Service, Great Lakes Forestry Centre, Sault Ste. Marie, Ontario, Canada.

The wool of the invasive, non-native hemlock woolly adelgid, Adelges tsugae Annand (Hemiptera: Adelgidae), occurs mostly on hemlock (Tsuga sp.) twigs, but can be dislodged from the canopy and end up on the forest floor and tree stem underneath the canopy. Herein, we developed and tested the efficacy of two novel sampling techniques, which are based on a visual examination of the forest floor and the hemlock stem for A. Read More

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Plasma Amyloid-β Oligomerization Tendency Predicts Amyloid PET Positivity.

Clin Interv Aging 2021 30;16:749-755. Epub 2021 Apr 30.

Department of Neurology, Seoul National University College of Medicine and Seoul National University Bundang Hospital, Seongnam-si, Gyeonggi-do, Republic of Korea.

Purpose: Among other emerging amyloid-targeting blood-based biomarkers, Multimer Detection System-Oligomeric Amyloid-β (MDS-OAβ) measures dynamic changes in concentration of oligomeric amyloid-β (OAβ), which is considered the main pathogenic culprit of Alzheimer's disease (AD), in plasma after spiking with synthetic amyloid-β (Aβ). We aimed to investigate the predictability of MDS-OAβ on amyloid positron emission tomography (PET) positivity.

Patients And Methods: A total of 96 subjects who visited Seoul National University Bundang Hospital for medical check-up complaining of cognitive decline and had undergone extensive medical assessment were recruited. Read More

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Quantifying procedural pain associated with office gynecologic tract sampling methods.

Gynecol Oncol 2021 May 3. Epub 2021 May 3.

Department of Obstetrics and Gynecology, Mayo Clinic, Rochester, MN, United States of America. Electronic address:

Objective: Emerging technologies may enable detection of endometrial cancer with methods that are less invasive than standard biopsy methods. This study compares patient pain scores among 3 office gynecologic tract sampling methods and explores their potential determinants.

Methods: A prospective study including 3 sampling methods (tampon, Tao brush (TB), endometrial biopsy (EB)) was conducted between December 2015 and August 2017 and included women ≥45 years of age presenting with abnormal uterine bleeding, postmenopausal bleeding, or thickened endometrial stripe. Read More

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Detection of Hostile Intent by Spatial Movements.

Hum Factors 2021 May 6:187208211015022. Epub 2021 May 6.

3447 Colorado State University, Fort Collins, USA.

Objective: The ability of people to infer intentions from movement of other vessels was investigated. Across three levels of variability in movements in the path of computer-controlled ships, participants attempted to determine which entity was hostile.

Background: Detection of hostile intentions through spatial movements of vessels is important in an array of real-world scenarios. Read More

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A comprehensive and fast microplastics identification based on near-infrared hyperspectral imaging (HSI-NIR) and chemometrics.

Environ Pollut 2021 Apr 28;285:117251. Epub 2021 Apr 28.

Department of Analytical Chemistry, Institute of Chemistry, University of Campinas (UNICAMP), PO BOX 6154, CEP 13083-970, Campinas, SP, Brazil. Electronic address:

Microplastic pollution is a global concern theme, and there is still the need for less laborious and faster analytical methods aiming at microplastics detection. This article describes a high throughput screening method based on near-infrared hyperspectral imaging (HSI-NIR) to identify microplastics in beach sand automatically with minimum sample preparation. The method operates directly in the entire sample or on its retained fraction (150 μm-5 mm) after sieving. Read More

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Complexity of EEG Dynamics for Early Diagnosis of Alzheimer's Disease Using Permutation Entropy Neuromarker.

Comput Methods Programs Biomed 2021 Apr 16;206:106116. Epub 2021 Apr 16.

Department of Electrical and Electronics Engineering, Dicle University, Diyarbakir, Turkey.

Background And Objective: Electroencephalogram (EEG) is one of the most demanded screening tools that investigates the effects of Alzheimer's Disease (AD) on human brain. Identification of AD in early stage gives rise to efficient treatment in dementia. Mild Cognitive Impairment (MCI) is considered as a conversion stage. Read More

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Capsulation of AuNCs with AIE Effect into Metal-Organic Framework for the Marriage of a Fluorescence and Colorimetric Biosensor to Detect Organophosphorus Pesticides.

Anal Chem 2021 May 6. Epub 2021 May 6.

Key Laboratory for Biobased Materials and Energy of Ministry of Education, College of Materials and Energy, South China Agricultural University, Guangzhou 510642, People's Republic of China.

Organophosphorus pesticides (OPs) can inhibit the activity of acetylcholinesterase (AChE) to induce neurological diseases. It is significant to exploit a rapid and sensitive strategy to monitor OPs. Here, a metal-organic framework (MOF) acted as a carrier to encapsulate AuNCs, which can limit the molecular motion of AuNCs, trigger the aggregation-induced emission (AIE) effect, and exhibit a strong fluorescence with a fluorescence lifetime and quantum yield of 6. Read More

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Contralaterally Enhanced Networks for Thoracic Disease Detection.

IEEE Trans Med Imaging 2021 May 6;PP. Epub 2021 May 6.

Identifying and locating diseases in chest X-rays are very challenging, due to the low visual contrast between normal and abnormal regions, and distortions caused by other overlapping tissues. An interesting phenomenon is that there exist many similar structures in the left and right parts of the chest, such as ribs, lung fields and bronchial tubes. This kind of similarities can be used to identify diseases in chest X-rays, according to the experience of broad-certificated radiologists. Read More

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Visual Quantitative Detection of Glutathione and Cholesterol in Human Blood Based on the Thiol-Ene Click Reaction-Triggered Wettability Change of the Interface.

Anal Chem 2021 May 6. Epub 2021 May 6.

Key Laboratory of Theoretical Organic Chemistry and Function Molecule, Ministry of Education; Hunan Provincial Key Laboratory of Controllable Preparation and Functional Application of Fine Polymers; Hunan Provincial Key Laboratory of Advanced Materials for New Energy Storage and Conversion; Function Film Engineering Research Center of Hunan Province, Hunan University of Science and Technology, Xiangtan 411201, P. R. China.

Herein, we proposed an innovative visual quantitative sensing strategy based on thiol-ene click chemistry and the capillary action principle. A triethoxyvinylsilane (VTEO)- or mercaptopropylsilatrane (MPS)-modified interface was prepared for analyte recognition. Target analyte molecules containing thiol groups or C═C double bonds are coupled to the VTEO- or MPS-modified inner surface of the glass capillary tube via a thiol-ene click reaction, respectively. Read More

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Chemogenetic suppression of anterior cingulate cortical neurons projecting to the visual cortex disrupts attentional behavior in mice.

Neuropsychopharmacol Rep 2021 May 6. Epub 2021 May 6.

Department of Psychiatry, Icahn School of Medicine at Mount Sinai, New York, NY, USA.

Aim: Attention is a goal-directed cognitive process that facilitates the detection of task-relevant sensory stimuli from dynamic environments. Anterior cingulate cortical area (ACA) is known to play a key role in attentional behavior, but the specific circuits mediating attention remain largely unknown. As ACA modulates sensory processing in the visual cortex (VIS), we aim to test a hypothesis that frontal top-down neurons projecting from ACA to VIS (ACA ) contributes to visual attention behavior through chemogenetic approach. Read More

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Recent progress in visual methods for aflatoxin detection.

Crit Rev Food Sci Nutr 2021 May 6:1-18. Epub 2021 May 6.

State Key Laboratory for Managing Biotic and Chemical Threats to the Quality and Safety of Agro-products, Key Laboratory of Information Traceability for Agricultural Products, Ministry of Agriculture and Rural Affairs, Institute of Agro-product Safety and Nutrition, Zhejiang Academy of Agricultural Sciences, Hangzhou, China.

Aflatoxins (AFs) contamination in food and agricultural products poses a significant threat to human health. Sensitive and accurate detection of AFs provides a strong guarantee for ensuring food safety. Conventional chromatographic-based or mass spectrum methods, which rely on bulky instrument and skilled personnel, are not suitable for on-site surveillance. Read More

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A phase I study of a PARP1-targeted topical fluorophore for the detection of oral cancer.

Eur J Nucl Med Mol Imaging 2021 May 5. Epub 2021 May 5.

Department of Radiology, Memorial Sloan Kettering Cancer Center, 1275 York Avenue, New York, NY, 10065, USA.

Background: Visual inspection and biopsy is the current standard of care for oral cancer diagnosis, but is subject to misinterpretation and consequently to misdiagnosis. Topically applied PARPi-FL is a molecularly specific, fluorescent contrast-based approach that may fulfill the unmet need for a simple, in vivo, non-invasive, cost-effective, point-of-care method for the early diagnosis of oral cancer. Here, we present results from a phase I safety and feasibility study on fluorescent, topically applied PARPi-FL. Read More

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Lung Infection Segmentation for COVID-19 Pneumonia Based on a Cascade Convolutional Network from CT Images.

Biomed Res Int 2021 15;2021:5544742. Epub 2021 Apr 15.

Department of Electronics and Telecommunications, Polytechnic University, Turin, Italy.

The COVID-19 pandemic is a global, national, and local public health concern which has caused a significant outbreak in all countries and regions for both males and females around the world. Automated detection of lung infections and their boundaries from medical images offers a great potential to augment the patient treatment healthcare strategies for tackling COVID-19 and its impacts. Detecting this disease from lung CT scan images is perhaps one of the fastest ways to diagnose patients. Read More

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Development of Reverse Transcription Loop-Mediated Isothermal Amplification Assay for Rapid and On-Site Detection of Avian Influenza Virus.

Front Cell Infect Microbiol 2021 19;11:652048. Epub 2021 Apr 19.

BioLabChip Group, Department of Biotechnology and Biomedicine, Technical University of Denmark, Kongens Lyngby, Denmark.

Avian influenza virus (AIV) outbreaks occur frequently worldwide, causing a potential public health risk and great economic losses to poultry industries. Considering the high mutation rate and frequent genetic reassortment between segments in the genome of AIVs, emerging new strains are a real threat that may infect and spread through the human population, causing a pandemic. Therefore, rapid AIV diagnostic tests are essential tools for surveillance and assessing virus spreading. Read More

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Hexachromatic bioinspired camera for image-guided cancer surgery.

Sci Transl Med 2021 May;13(592)

Department of Electrical and Computer Engineering, University of Illinois at Urbana-Champaign, Urbana, IL 61801, USA.

Cancer affects one in three people worldwide. Surgery remains the primary curative option for localized cancers, but good prognoses require complete removal of primary tumors and timely recognition of metastases. To expand surgical capabilities and enhance patient outcomes, we developed a six-channel color/near-infrared image sensor inspired by the mantis shrimp visual system that enabled near-infrared fluorescence image guidance during surgery. Read More

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The research for the function evaluation of facial nerve and the mechanisms of rehabilitation training.

Medicine (Baltimore) 2021 May;100(18):e25430

Guangzhou University of Chinese Medicine, Guangzhou, China.

Background: Peripheral facial paralysis (PFP) is a common peripheral neural disease. Acupuncture treatment combined with PFP rehabilitation exercises is a routine method of PFP treatment. This article is to provide a new visual and objective evaluation method for exploring the mechanism and efficacy of acupuncture treatment on PFP, and develop an interactive augmented facial nerve function rehabilitation training system with multiple training models. Read More

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Attention differentially modulates multiunit activity in the LGN and V1 of macaque monkeys.

J Comp Neurol 2021 May 5. Epub 2021 May 5.

Neuroscience Graduate Program, University of Rochester Medical Center, Rochester, NY, USA.

Attention promotes the selection of behaviorally relevant sensory signals from the barrage of sensory information available. Visual attention modulates the gain of neuronal activity in all visual brain areas examined, although magnitudes of gain modulations vary across areas. For example, attention gain magnitudes in the dorsal lateral geniculate nucleus (LGN) and primary visual cortex (V1) vary tremendously across fMRI measurements in humans and electrophysiological recordings in behaving monkeys. Read More

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Convolutional neural networks for the diagnosis and prognosis of the coronavirus disease pandemic.

Vis Comput Ind Biomed Art 2021 May 5;4(1):12. Epub 2021 May 5.

Department of Computer Science, Kuvempu University, Shimoga, Karnataka, 577451, India.

A neural network is one of the current trends in deep learning, which is increasingly gaining attention owing to its contribution in transforming the different facets of human life. It also paves a way to approach the current crisis caused by the coronavirus disease (COVID-19) from all scientific directions. Convolutional neural network (CNN), a type of neural network, is extensively applied in the medical field, and is particularly useful in the current COVID-19 pandemic. Read More

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Automated Explainable Multidimensional Deep Learning Platform of Retinal Images for Retinopathy of Prematurity Screening.

JAMA Netw Open 2021 May 3;4(5):e218758. Epub 2021 May 3.

Joint Shantou International Eye Center of Shantou University, the Chinese University of Hong Kong, Shantou, Guangdong, China.

Importance: A retinopathy of prematurity (ROP) diagnosis currently relies on indirect ophthalmoscopy assessed by experienced ophthalmologists. A deep learning algorithm based on retinal images may facilitate early detection and timely treatment of ROP to improve visual outcomes.

Objective: To develop a retinal image-based, multidimensional, automated, deep learning platform for ROP screening and validate its performance accuracy. Read More

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Visual Detection and Decoding Skills of Aerial Photography by Adults with Autism Spectrum Disorder (ASD).

J Autism Dev Disord 2021 May 4. Epub 2021 May 4.

School of Optometry and Vision Science, Faculty of Life Science, Bar-Ilan University, Ramat Gan, Israel.

Despite challenges in social communication skills people with ASD often display strengths in visual processing. Aerial photography analysis is an occupation reliant on strong visual processing skills that matches this unique profile. We investigated basic-vision and "real-life" visual tasks in 20 cognitively-able young adults with ASD and 20 typically-developed (TD) "gamers". Read More

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Semiquantitative analysis of interim F-FDG PET is superior in predicting outcome in Hodgkin lymphoma patients compared to visual analysis.

Rev Esp Med Nucl Imagen Mol 2021 May 1. Epub 2021 May 1.

Onco-Hematology Department, Instituto Português de Oncologia do Porto FG, Portugal.

Purpose: To investigate the prognostic value of interim PET (PETi) in adult HL patients, comparing visual with semiquantitative analysis.

Material And Methods: Retrospective analysis of Hodgkin's Lymphoma (HL) patients diagnosed between 2012 and 2016 in the Onco-Hematology Department of Instituto Português de Oncologia - Porto (median follow-up: 46.5 months [2,6-66,4]). Read More

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Diverse Genetic Landscape of Suspected Retinitis Pigmentosa in a Large Korean Cohort.

Genes (Basel) 2021 Apr 30;12(5). Epub 2021 Apr 30.

Department of Ophthalmology, Asan Medical Center, University of Ulsan College of Medicine, Seoul 05505, Korea.

We conducted targeted next-generation sequencing (TGS) and/or whole exome sequencing (WES) to assess the genetic profiles of clinically suspected retinitis pigmentosa (RP) in the Korean population. A cohort of 279 unrelated Korean patients with clinically diagnosed RP and available family members underwent molecular analyses using TGS consisting of 88 RP-causing genes and/or WES with clinical variant interpretation. The combined genetic tests (TGS and/or WES) found a mutation in the 44 RP-causing genes and seven inherited retinal disease (IRD)-causing genes, and the total mutation detection rate was 57%. Read More

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Similarity-constrained task-related component analysis for enhancing SSVEP detection.

J Neural Eng 2021 May 4. Epub 2021 May 4.

State Key Laboratory of Power Transmission Equipment & System Security and New Technology, Chongqing University School of Electrical Engineering, Chongqing University, Chongqing, 400044, CHINA.

Objective: Task-related component analysis (TRCA) is a representative subject-specific training algorithm in steady-state visual evoked potential (SSVEP)-based brain-computer interfaces (BCIs). Task-related components (TRCs), extracted by the TRCA-based spatial filtering from EEG signals through maximizing the reproducibility across trials, may contain some task-related inherent noise that is still trial-reproducible.

Approach: To address this problem, this study proposed a similarity-constrained TRCA (scTRCA) algorithm to remove the task-related noise and extract TRCs maximally correlated with SSVEPs for enhancing SSVEP detection. Read More

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An inexpensive point-of-care immunochromatographic test for Talaromyces marneffei infection based on the yeast phase specific monoclonal antibody 4D1 and Galanthus nivalis agglutinin.

PLoS Negl Trop Dis 2021 May 4;15(5):e0009058. Epub 2021 May 4.

Department of Microbiology, Faculty of Medicine, Chiang Mai University, Chiang Mai, Thailand.

Talaromyces marneffei is a thermally dimorphic fungus that causes opportunistic systemic mycoses in patients with AIDS or other immunodeficiency syndromes. The purpose of this study was to develop an immunochromatographic strip test (ICT) based on a solid phase sandwich format immunoassay for the detection of T. marneffei antigens in clinical urine specimens. Read More

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Deep Relation Transformer for Diagnosing Glaucoma with Optical Coherence Tomography and Visual Field Function.

IEEE Trans Med Imaging 2021 May 4;PP. Epub 2021 May 4.

Glaucoma is the leading reason for irreversible blindness. Early detection and timely treatment of glaucoma are essential for preventing visual field loss or even blindness. In clinical practice, Optical Coherence Tomography (OCT) and Visual Field (VF) exams are two widely-used and complementary techniques for diagnosing glaucoma. Read More

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Additional coracoclavicular augmentation reduces revision rates in the treatment of lateral clavicle fractures as compared to angle-stable plate osteosynthesis alone.

Arch Orthop Trauma Surg 2021 May 4. Epub 2021 May 4.

Department of Orthopedics and Traumatology, Diakovere Friederikenstift, Humboldtstraße 5, 30169, Hannover, Germany.

Introduction: There is no uniform approach to the management of lateral clavicle fractures. Recent studies have investigated additive coracoclavicular (CC) augmentation as a treatment option; however, it is unclear whether it is superior to conventional locking plate osteosynthesis.

Methods: We carried out a retrospective analysis of 40 patients with lateral clavicle fracture (Neer type IIb) who were treated between 2014 and 2017 with either a hybrid locking plate osteosynthesis/additive arthroscopy-assisted CC augmentation (HP) procedure or a locking plate osteosynthesis only (PO) approach to determine which strategy was more effective. Read More

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Shared resources between visual attention and visual working memory are allocated through rhythmic sampling.

Eur J Neurosci 2021 May 3. Epub 2021 May 3.

Center for Mind/Brain Sciences, University of Trento, Rovereto, Italy.

Attention and Visual Working Memory (VWM) are among the most theoretically detailed and empirically tested constructs in human cognition. Nevertheless, the nature of the interrelation between selective attention and VWM still presents a fundamental controversy: do they rely on the same cognitive resources or not? The present study aims at disentangling this issue by capitalizing on recent evidence showing that attention is a rhythmic phenomenon, oscillating over short time windows. Using a dual-task approach, we combined a classic VWM task with a visual detection task in which we densely sampled detection performance during the time between the memory and the test array. Read More

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