Article
Engineering, Environmental
Fengyi Guan, Junlin Wen, Junyang Liu, Shungui Zhou, Yong Yuan
Summary: A simple and effective colorimetric method for quantifying PFRs in biochars was proposed in this study. By using TMB as a reporter, the concentration of PFRs was determined through color development. The results demonstrated a significant correlation between the developed method and the traditional measurement method, and the method showed potential for high-throughput detection using a smartphone.
ENVIRONMENTAL SCIENCE & TECHNOLOGY LETTERS
(2023)
Article
Multidisciplinary Sciences
Jiho Kang, Stephanie A. Valenzuela, Emily Y. Lin, Manuel N. Dominguez, Zachary M. Sherman, Thomas M. Truskett, Eric Anslyn, Delia J. Milliron
Summary: By using a metal coordination linkage, the bonding of nanocrystal gels can be quantified in situ, allowing for the establishment of their structure and thermodynamic bases. The color change based on this linkage enables the development of switchable gels and provides new insights for the rational design of programmable nanocrystal networks.
Article
Polymer Science
Marina Gorbunova, Darya Zagumennova, Larisa Lemkina
Summary: Polyampholytes are a type of multifunctional polymers with cationic and anionic groups, and by adjusting the total charge, the properties of the macromolecule can be significantly changed. This study focuses on the radical copolymerization of AGC with different unsaturated acids, revealing their reactivity and resulting in cyclolinear polymer chains. The kinetics of this polymerization process are also examined. Furthermore, the potential for chemical modifications and antimicrobial properties of these copolymers are discussed.
POLYMERS FOR ADVANCED TECHNOLOGIES
(2023)
Article
Chemistry, Applied
Maxime Le Bot, Juliette Thibault, Quentin Pottier, Severine Boisard, David Guilet
Summary: Saponins are widely found in plants and have various industrial applications. Currently, there is a lack of techniques that can accurately and rapidly analyze both triterpenoid and steroidal saponins. Researchers have developed a new colorimetric method that can effectively analyze saponin blends and overcome the disadvantages of existing techniques.
Article
Materials Science, Multidisciplinary
Sushmitha Pedugu Sivaraman, Akhila Maheswari Mohan
Summary: This study focuses on developing simple and fast probe-decorated macro-/mesoporous polymer monolithic solid-state visual colorimetric sensors for quantifying ultratrace amounts of Co2+. By manipulating the structure of the polymer matrix and the composition and concentration of the probe molecules, high selectivity and sensitivity for Co2+ ions were achieved. The proposed sensor materials have the advantages of low detection limits, rapid response, and good data reliability and reproducibility, making them suitable for the detection of environmental water samples.
ACS APPLIED POLYMER MATERIALS
(2022)
Article
Chemistry, Analytical
Junjie Feng, Huiyun Jiang, Yan Jin, Shenghui Rong, Shiqiang Wang, Haozhi Wang, Lin Wang, Wei Xu, Bing Sun
Summary: A general and adaptable method is proposed for extracting quantitative information from smartphone images of microfluidic sensors. The method significantly reduces the influence of light conditions, device differences, and human factors by analyzing and processing color information of selected standard substances. Machine learning and multivariate fitting methods are effective for chroma correction, and a custom APP was developed and validated using high-sensitivity chromium ion quantification paper chip. The proposed approach could complement existing and potential colorimetry-based detection methods.
Article
Chemistry, Applied
Sushmitha Pedugu Sivaraman, Akhila Maheswari Mohan
Summary: In this work, a simple, low-cost, benign, and portable solid-state optical sensor material was demonstrated by directly immobilizing a chromoionophoric probe onto a porous polymer monolithic template. The material showed superior sensing properties in capturing ultra-trace concentration of Cu2+ ions, and reliable and reproducible results were obtained in experiments.
MICROPOROUS AND MESOPOROUS MATERIALS
(2021)
Article
Environmental Sciences
Meri Nakajima, Reiko Hirano, Satoshi Okabe, Hisashi Satoh
Summary: A simple assay for colorimetric quantification of bacterial 16S rRNA was developed, based on RNA extraction with commercial kits and mixing with Au-nanoprobes and NaCl. The assay format was validated and optimized, achieving linear calibration curve above 5.0 x 10(7) copies/mu L and a limit of detection of 1.17 x 10(8) copies/mu L. The quantification of bacterial 16S rRNA in activated sludge samples showed deviations between 48% and 208% compared to RT-qPCR results, introducing an innovative tool for stable treatment performance in wastewater processes.
Article
Mechanics
Bing Li, Zhiqiang Ding, Yuqing Guo, Yabo Wang, Haifeng Tang, Daijun Yang, Pingwen Ming, Cunman Zhang
Summary: The study used the lattice Boltzmann method to simulate the dynamic behavior of catalyst particles in a proton exchange membrane fuel cell during the ink dispersion process, finding that different shear strengths significantly influence the formation of agglomerates. Results showed that a Reynolds number of 1000 achieved optimal dispersion and stability, with aggregate particles exhibiting different structures under different Reynolds numbers.
Article
Chemistry, Analytical
Lucas F. Quartarolli, Alceu T. Silveira, Henrique E. Toma
Summary: The article introduces a new method for lithium ion analysis based on the formation of LiKFe(IO6) compound and tris(1,10-phenanthroline)iron(ii) complex, monitored by spectrophotometric or colorimetric methods, with the help of a smartphone app. Compared to existing methods, this new approach is simpler, more cost-effective, and suitable for educational and field experiments.
ANALYTICAL METHODS
(2021)
Article
Chemistry, Analytical
Rui Zhao, Yubin Shen, Chenyu Zhao, Chengfeng Wu, Yuyang Liu, Huakun Wan, Zhentan Lu
Summary: Rapid screening platform based on nanofiber membrane enrichment bacteria-assisted cell counting Kit-8 (CCK8) colorimetry is reported for antibiotic susceptibility testing (AST). The new platform significantly shortens the detection time compared to traditional methods and has a detection limit of 10 CFU mL(-1). The results of antibiotic susceptibility evaluation using the new platform are consistent with traditional methods. The new screening platform shows promise for rapid antibiotic susceptibility testing in vitro.
Article
Nanoscience & Nanotechnology
Yukiya Kitayama, Atsushi Harada
Summary: Spherical poly(2-diethylaminoethyl methacrylate-co-2-cinnamoylethyl methacrylate) (P(DEAEMA-CEMA)) particles were directly encapsulated with controlled pH-responsive release properties via interfacial photo-cross-linking. The encapsulated materials were stably retained under neutral pH conditions and released under acidic pH conditions, with release kinetics controlled by pH. The pH-responsive release properties were regulated by changing the polymer composition in P(DEAEMA-CEMA), demonstrating potential for broad applications in advanced research fields.
ACS APPLIED MATERIALS & INTERFACES
(2021)
Article
Engineering, Electrical & Electronic
Nancy Sidana, Prachi Rajput, Pooja Devi, Harminder Kaur
Summary: A highly sensitive and selective colorimetric sensor assay for detecting Hg2+ ions is presented in this study. This approach utilizes an anti-aggregation sensing method with AuNPs and an amine-based sensor (S) to achieve color variation from red to blue, indicating the presence of Hg2+ ions.
IEEE SENSORS JOURNAL
(2022)
Article
Biotechnology & Applied Microbiology
Gabriele Sass, Marie-Christine Groleau, Eric Deziel, David A. Stevens
Summary: This study presents a simple method for quantifying biosurfactants based on their ability to reduce surface tension of aqueous solutions on paper. The method is applicable to various types of surfactants and easily accessible in any laboratory.
FRONTIERS IN BIOENGINEERING AND BIOTECHNOLOGY
(2023)
Article
Chemistry, Multidisciplinary
Jae-Hyun Kim, Joseph Rosenfeld, Ye Chan Kim, Sean Choe, Russell J. Composto, Daeyeon Lee, Remi Dreyfus
Summary: Colloidal colorimetric microsensors have the potential to detect mechanical strains in materials. This study introduces a method for synthesizing these sensors using polymer-grafted gold nanoparticles, which allows for reversible deformability and increased sensitivity.
Article
Agronomy
Xiu-Jing Shen, Li-Jun Cao, Jin-Cui Chen, Li-Jun Ma, Jia-Xu Wang, Ary A. Hoffmann, Shu-Jun Wei
Summary: This study investigated the frequency and distribution pattern of resistance mutations in the diamondback moth (DBM) across China. The results showed a widespread distribution of resistance alleles in DBM populations, with some mutations near fixation and others less common or absent in most populations. The frequency of resistance alleles remained relatively stable among different years, although there was a decrease in the frequency of certain mutations. Principal component analysis revealed clustering of immigrant populations with other populations, indicating a migration pattern from the Sichuan area of southwestern China. The study also found that most resistant mutations deviated from Hardy-Weinberg equilibrium, suggesting the influence of heterogeneous selection pressures on resistance mutations.
PEST MANAGEMENT SCIENCE
(2023)
Article
Chemistry, Multidisciplinary
Cui Wang, Kenny Ebel, Katja Heinze, Ute Resch-Genger, Ilko Bald
Summary: Photodynamic therapy (PDT) for cancer treatment relies on the generation of highly reactive oxygen species by light-induced excitation of a photosensitizer in the presence of molecular oxygen, causing DNA damage. Recently, the potential of photoactive complexes of non-noble metals as photosensitizers has been discovered.
CHEMISTRY-A EUROPEAN JOURNAL
(2023)
Article
Multidisciplinary Sciences
Priyanka Srivastava, Isabella Tavernaro, Lena Scholtz, Claudia Genger, Pia Welker, Frank Schreiber, Klas Meyer, Ute Resch-Genger
Summary: Ratiometric green-red fluorescent nanosensors were designed for fluorometric monitoring of pH in the acidic range. These nanosensors showed good sensing performance and were suitable for intracellular pH sensing.
SCIENTIFIC REPORTS
(2023)
Article
Nanoscience & Nanotechnology
Mingzhou Meng, Tianmei Zhang, Jiaoyu Wang, Zhenlong Cheng, Yuanli Liu, Xin Qiao, Jian Wen, Ute Resch-Genger, Wen Long, Jun Ou
Summary: The core-shell NaYF4:Yb3+/Tm3+@NaYF4:Yb3+ upconversion nanoparticles were prepared successfully by a solvothermal method and coated with mesoporous silica (mSiO2) to enhance their hydrophilicity. The nanoparticles demonstrated good temperature sensing performance and intense fluorescence emission. They also showed high reliability and accuracy in temperature measurement in phosphate-buffered saline (PBS) solution. This study provides a potential platform for real-time temperature monitoring and thermotherapy of cancer cells.
ACS APPLIED NANO MATERIALS
(2023)
Article
Chemistry, Analytical
Jutta Pauli, Arne Guettler, Thomas Schneider, Christian Wuerth, Ute Resch-Genger
Summary: The rational design of next generation molecular and nanoscale reporters and the comparison of different emitter classes require the determination of the key performance parameter fluorescence quantum yield (phi f). Reliable phi f measurements require instrument calibration procedures and well-characterized fluorescence quantum yield standards. The accuracy of the standard's phi f value contributes to the uncertainty of relative phi f measurements.
ANALYTICAL CHEMISTRY
(2023)
Article
Entomology
Xuefen Xu, Ary A. A. Hoffmann, Paul A. A. Umina, Samantha E. E. Ward, Marianne P. P. Coquilleau, Mallik B. B. Malipatil, Peter M. M. Ridland
Summary: Three polyphagous pest species have invaded Australia, causing damage to horticultural crops. This study identified 14 parasitoid species using molecular and morphological data, including five adventive eulophid wasps and two braconid species. The findings provide valuable information for controlling leafminers.
BULLETIN OF ENTOMOLOGICAL RESEARCH
(2023)
Article
Entomology
Paul. A. A. Umina, Leo McGrane, Joshua. A. A. Thia, Evatt Chirgwin, Ary. A. A. Hoffmann
Summary: Resistance to pesticides in the agricultural pest mite Halotydeus destructor has been validated through field experiments after being identified in laboratory bioassays. Results showed that resistance to the organophosphate chlorpyrifos was significantly higher than resistance to omethoate. While both chemicals effectively controlled pesticide-susceptible populations of H. destructor in field trials, chlorpyrifos was substantially less effective against a resistant mite population, while omethoate remained effective. Additionally, two non-pesticide treatments were found to be ineffective in controlling H. destructor in field conditions.
EXPERIMENTAL AND APPLIED ACAROLOGY
(2023)
Article
Environmental Sciences
Edward Tsyrlin, Melissa Carew, Ary A. Hoffmann, Simon Linke, Rhys A. Coleman
Summary: Family-level identification is commonly used for monitoring freshwater macroinvertebrates, but its effectiveness in reflecting regional biodiversity patterns in Australia is untested. This study compared family-level and species-level datasets for freshwater insects in Melbourne, Australia. The results showed a positive relationship between family and species richness, but the family-level dataset underestimated the sampling effort needed to accurately reflect species diversity and overlooked regionally rare species. It is recommended to include species-level identification in monitoring programs to understand regional biodiversity patterns and conservation priorities.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2023)
Article
Chemistry, Physical
Lucia Labrador-Paez, Jouko Kankare, Iko Hyppaenen, Tero Soukka, Elina Andresen, Ute Resch-Genger, Jerker Widengren, Haichun Liu
Summary: The frequency-domain (FD) method is an alternative approach to the time-domain (TD) method for characterizing luminescence kinetics. In this study, the luminescence response of upconversion nanoparticles (UCNPs) was thoroughly analyzed using the FD method, and it was found that the FD method can obtain the effective decay rates of three critical energy states involved in the upconversion process. Experimental data demonstrated the validity of the FD method, showing good agreement with results obtained by TD methods.
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
(2023)
Article
Biochemistry & Molecular Biology
Jin-Xu Dai, Li-Jun Cao, Jin-Cui Chen, Fangyuan Yang, Xiu-Jing Shen, Li-Jun Ma, Ary Anthony Hoffmann, Min Chen, Shu-Jun Wei
Summary: The fall webworm (FWW) invaded China 40 years ago and subsequently diverged into two genetic groups. Based on genome-wide SNPs, we found genetically separated western and eastern groups of FWW, and correlated spatial variation in SNPs with geographical and climatic factors. Our study suggests that invasive species may maintain the evolutionary potential to adapt to heterogeneous environments despite a single invasion event.
Article
Biochemistry & Molecular Biology
Ary A. Hoffmann, Moshe Jasper, Vanessa L. White, Hiromi Yagui, Michael R. Kearney
Summary: Low-vagility species can hold strong genetic signatures and face vulnerability due to habitat loss. The genetic variation of Vandiemenella viatica populations in Tasmania and Victoria was analyzed, revealing low genetic diversity associated with past biogeographical processes. This study highlights the importance of preserving genetic variation.
Article
Chemistry, Analytical
Sarah-Luise Abram, Paul Mrkwitschka, Andreas F. Thuenemann, Joerg Radnik, Ines Haeusler, Harald Bresch, Vasile-Dan Hodoroaba, Ute Resch-Genger
Summary: The rational design and increasing industrial use of nanomaterials require accurate characterization of their properties. Therefore, nanoscale reference materials (nanoRMs) are needed to validate characterization methods. This study developed a small iron oxide nanocube nanoRM to complement existing spherical nanoRMs. The nanoRM was characterized using transmission electron microscopy (TEM) and small-angle X-ray scattering (SAXS). The certified size parameters, determined with high precision, can be used for quality control of nanomaterial sizing methods. The production of this new iron oxide nanocube RM is an important achievement for the nanomaterial community, manufacturers, and regulators.
ANALYTICAL CHEMISTRY
(2023)
Article
Biotechnology & Applied Microbiology
Wanzhen Liu, Xue Xia, Ary A. Hoffmann, Yamei Ding, Ji-Chao Fang, Hui Yu
Summary: This study discovered novel Wolbachia strains in a pollinator species through genome sequencing, investigated their phylogenetic relationship and cytoplasmic incompatibility, and identified mobile genetic elements and metabolic genes. The findings provide important resources for further research on Wolbachia-pollinator-host plant interactions.
Article
Multidisciplinary Sciences
Lena Scholtz, Isabella Tavernaro, J. Gerrit Eckert, Marc Lutowski, Daniel Geissler, Andreas Hertwig, Gundula Hidde, Nadja C. Bigall, Ute Resch-Genger
Summary: Surface-functionalized polymer beads encoded with molecular luminophores and nanocrystalline emitters such as quantum dots (QDs) or magnetic nanoparticles are widely used in the life sciences. The chemical nature and total number of surface functional groups (FGs) on these beads play a crucial role in their applications. This study investigates the influence of QD encoding on the number of carboxylic acid (COOH) surface FGs on polystyrene microparticles (PSMPs) using different encoding procedures and quantifying the FG number through colorimetric assays and other techniques. The results highlight the impact of QD encoding and encoding strategies on the surface chemistry of the beads, providing insights for nanoparticle-encoded bead applications and nanomaterial design.
SCIENTIFIC REPORTS
(2023)
Article
Chemistry, Physical
Lucia Labrador-Paez, Jouko Kankare, Iko Hyppaenen, Tero Soukka, Elina Andresen, Ute Resch-Genger, Jerker Widengren, Haichun Liu
Summary: The frequency-domain method is an alternative approach to the commonly used time-domain method in characterizing the luminescence kinetics of luminophores. It has the ability to separate multiple lifetime components with higher reliability and accuracy. Although extensively used for down-shifted emission luminophores, its application in studying nonlinear luminescent materials such as lanthanide-doped upconversion nanoparticles has not been explored.
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
(2023)