A fully-functional smartphone-based spectrophotometer was designed and built using 3D printing. The major advantage of this approach is its capacity to be interfaced with a variety of smartphones, allowing the use of the smartphone's camera and display, and regardless of the relative position of the camera. The analytical performance of the device was analyzed using a model dye (crystal violet), leading to a proportional response for concentrations in the 0.06-15.0 mg L range, with a variability of 1.0% (intra-day) and 2.6% (inter-day). To demonstrate the functionality of the device, the degradation process of the dye by sodium hypochlorite was studied. The results obtained were applied to develop a paper-based test for NaClO in sanitation solutions, in which the time required to bleach the dye was used to estimate the concentration of the solution. This device represents a simple and inexpensive tool for everyday laboratory use and could address important analytical challenges in low-income communities and features a versatile arrangement, that is compatible with a wide variety of smartphones and software platforms.
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http://dx.doi.org/10.1016/j.aca.2021.338249 | DOI Listing |
Plant Commun
January 2025
National Key Laboratory of Crop Genetic Improvement, Huazhong Agricultural University, Wuhan 430070, China; Hubei Hongshan Laboratory, Hubei, China. Electronic address:
In the face of climate change and the growing global population, there is an urgent need to accelerate the development of high-yielding crop varieties. To this end, vast amounts of genotype-to-phenotype data have been collected, and many machine learning (ML) models have been developed to predict phenotype from a given genotype. However, the requirement for high densities of single-nucleotide polymorphisms (SNPs) and the labor-intensive collection of phenotypic data are hampering the use of these models to advance breeding.
View Article and Find Full Text PDFNanotechnology
January 2025
Electronics Materials and Systems Laboratory, Department of Microtechnology and Nanoscience (MC2), Chalmers University of Technology, Kemivägen 9, SE-412 96 Göteborg, Sweden.
The trend towards miniaturization of electronics and increasing transistor density in semiconductors requires more efficient cooling solutions. Vapor chambers are well established passive cooling devices that are used in a wide variety of electronics. Commercial vapor chambers are often made of high-density metals such as copper which can be a downside in lightweight applications such as laptops, smartphones, and tablets.
View Article and Find Full Text PDFPeerJ Comput Sci
November 2024
Research, Motorola Mobility, Chicago, IL, United States.
The Internet of Things (IoT) is becoming indispensable across various application domains. In the domain of the consumer IoT, many original device manufacturers are coming up with a wide variety of IoT-based products and services catering with a range of applications such as personal-fitness training devices, healthcare devices, to smart-home things, . There is an accompanying smartphone application, called the IoT control app (ICA) through which such IoT devices are controlled.
View Article and Find Full Text PDFDigit Health
December 2024
Hunter College, School of Urban Public Health, New York, NY, USA.
Objectives: Technology, mobile health (mHealth), and "eHealth" are broadly used in childhood overweight and obesity interventions. However, the impact of technology-based interventions where parents or caregivers are involved is unclear. Thus, the objective of this manuscript is to provide valuable insights about the development of a parent-child web-based tool to promote healthy eating among preadolescents.
View Article and Find Full Text PDFInternet Interv
December 2024
Department of Sport and Health Sciences, Technical University of Munich, Munich, Germany.
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