Second Associative Anamnesis with a Temperature Stimulus

2015 ◽  
pp. 62-80
Keyword(s):  
Temperature Stimulus

scholarly journals Covalent organic framework nanofluidic membrane as a platform for highly sensitive bionic thermosensation

2021 ◽  
Vol 12 (1) ◽  
Author(s):  
Pengcheng Zhang ◽  
Sifan Chen ◽  
Changjia Zhu ◽  
Linxiao Hou ◽  
Weipeng Xian ◽  
...  
Keyword(s):  
Thermal Sensation ◽  
Biological Response ◽  
Covalent Organic Framework ◽  
Physiological Processes ◽  
Potential Applicability ◽  
Continuous Potential ◽  
Temperature Stimulus ◽  
Nanofluidic System ◽  
Response To Temperature ◽  
Organic Framework

AbstractThermal sensation, which is the conversion of a temperature stimulus into a biological response, is the basis of the fundamental physiological processes that occur ubiquitously in all organisms from bacteria to mammals. Significant efforts have been devoted to fabricating artificial membranes that can mimic the delicate functions of nature; however, the design of a bionic thermometer remains in its infancy. Herein, we report a nanofluidic membrane based on an ionic covalent organic framework (COF) that is capable of intelligently monitoring temperature variations and expressing it in the form of continuous potential differences. The high density of the charged sites present in the sub-nanochannels renders superior permselectivity to the resulting nanofluidic system, leading to a high thermosensation sensitivity of 1.27 mV K−1, thereby outperforming any known natural system. The potential applicability of the developed system is illustrated by its excellent tolerance toward a broad range of salt concentrations, wide working temperatures, synchronous response to temperature stimulation, and long-term ultrastability. Therefore, our study pioneers a way to explore COFs for mimicking the sophisticated signaling system observed in the nature.

scholarly journals Analysis of Hot-Cold Confusion on Fingers

2021 ◽  
Vol 33 (5) ◽  
pp. 1117-1127
Author(s):  
Satoshi Hashiguchi ◽  
Keyword(s):  
Thermal Properties ◽  
Proximal Phalanx ◽  
Mutual Effect ◽  
Distal Phalanx ◽  
Experimental Results ◽  
Middle Phalanx ◽  
Temperature Sensation ◽  
Temperature Stimulus

The thermosensory system may misidentify a temperature stimulus with different thermal properties. The mechanism of this hot-cold confusion has not been clarified; hence, it has not yet been applied. In this study, we created a wearable temperature presentation device that is closer to the application and analyzed the tendency and mechanism of temperature confusion by analyzing the hot-cold confusion of temperature sensation in the fingers, which are most frequently in contact with objects. Two experiments were performed. In the first experiment, we presented stimuli on the tips of three fingers (first, second, and third fingers). In the second experiment, we presented stimuli at the center of the distal phalanx, middle phalanx, and proximal phalanx of the first finger. The experimental results indicated the occurrence of hot-cold confusion. Domination, in which the center is dominated by both ends, and a mutual effect, in which the center interacts with both ends, were observed.

scholarly journals Hierarchically patterned self-powered sensors for multifunctional tactile sensing

2020 ◽  
Vol 6 (34) ◽  
pp. eabb9083 ◽  
Author(s):  
Yang Wang ◽  
Heting Wu ◽  
Lin Xu ◽  
Hainan Zhang ◽  
Ya Yang ◽  
...  
Keyword(s):  
Low Cost ◽  
Fast Response ◽  
Temperature Sensors ◽  
Physical Contact ◽  
Tactile Sensing ◽  
Material Identification ◽  
Flexible Sensors ◽  
Temperature Stimulus ◽  
Self Powered ◽  
Multifunctional Sensor

Flexible sensors are highly desirable for tactile sensing and wearable devices. Previous researches of smart elements have focused on flexible pressure or temperature sensors. However, realizing material identification remains a challenge. Here, we report a multifunctional sensor composed of hydrophobic films and graphene/polydimethylsiloxane sponges. By engineering and optimizing sponges, the fabricated sensor exhibits a high-pressure sensitivity of >15.22 per kilopascal, a fast response time of <74 millisecond, and a high stability over >3000 cycles. In the case of temperature stimulus, the sensor exhibits a temperature-sensing resolution of 1 kelvin via the thermoelectric effect. The sensor can generate output voltage signals after physical contact with different flat materials based on contact-induced electrification. The corresponding signals can be, in turn, used to infer material properties. This multifunctional sensor is excellent in its low cost and material identification, which provides a design concept for meeting the challenges in functional electronics.

scholarly journals A bumblebee thioredoxin-like protein gene that is up-regulated by a temperature stimulus and lipopolysaccharide injection

2006 ◽  
Vol 103 (2) ◽  
pp. 291-296 ◽  
Author(s):  
Yong Soo CHOI ◽  
Kwang Sik LEE ◽  
Hyung Joo YOON ◽  
Iksoo KIM ◽  
Hung Dae SOHN ◽  
...  
Keyword(s):  
Protein Gene ◽  
Temperature Stimulus

scholarly journals Identification and Analysis of Small Interfering RNAs Associated With Heat Stress in Flowering Chinese Cabbage Using High-Throughput Sequencing

2021 ◽  
Vol 12 ◽  
Author(s):  
Waqas Ahmed ◽  
Yanshi Xia ◽  
Ronghua Li ◽  
Hua Zhang ◽  
Kadambot H.M Siddique ◽  
...  
Keyword(s):  
Heat Stress ◽  
Heat Tolerance ◽  
Chinese Cabbage ◽  
High Throughput Sequencing ◽  
Target Genes ◽  
Small Interfering Rnas ◽  
Flowering Chinese Cabbage ◽  
Disease Resistance Protein ◽  
Temperature Stimulus ◽  
Tolerance Gene

Endogenous small interfering RNAs (siRNAs) are substantial gene regulators in eukaryotes and play key functions in plant development and stress tolerance. Among environmental factors, heat is serious abiotic stress that severely influences the productivity and quality of flowering Chinese cabbage (Brassica campestris L. ssp. chinensis var. utilis Tsen et Lee). However, how siRNAs are involved in regulating gene expression during heat stress is not fully understood in flowering Chinese cabbage. Combining bioinformatical and next-generation sequencing approaches, we identified heat-responsive siRNAs in four small RNA libraries of flowering Chinese cabbage using leaves collected at 0, 1, 6, and 12 h after a 38°C heat-stress treatment; 536, 816, and 829 siRNAs exhibited substantial differential expression at 1, 6, and 12 h, respectively. Seventy-five upregulated and 69 downregulated differentially expressed siRNAs (DE-siRNAs) were common for the three time points of heat stress. We identified 795 target genes of DE-siRNAs, including serine/threonine-protein kinase SRK2I, CTR1-like, disease resistance protein RML1A-like, and RPP1, which may play a role in regulating heat tolerance. Gene ontology showed that predictive targets of DE-siRNAs may have key roles in the positive regulation of biological processes, organismal processes, responses to temperature stimulus, signaling, and growth and development. These novel results contribute to further understanding how siRNAs modulate the expression of their target genes to control heat tolerance in flowering Chinese cabbage.

Microorganism inspired hydrogels: fermentation capacity, gelation process and pore-forming mechanism under temperature stimulus

RSC Advances ◽  
2015 ◽  
Vol 5 (112) ◽  
pp. 91937-91945 ◽  
Author(s):  
Bingjie Chen ◽  
Shuhua Zhang ◽  
Qingsong Zhang ◽  
Qifeng Mu ◽  
Lingli Deng ◽  
...  
Keyword(s):  
Pore Size ◽  
Gelation Process ◽  
Forming Mechanism ◽  
Fermentation Capacity ◽  
Temperature Stimulus

By controlling the temperature of fermentation and gelation, 3D microorganism inspired hydrogels (MIH) with a pore size from 5 μm to 900 μm could be obtained.

scholarly journals Fabrication of Photothermo-Responsive Drug-Loaded Nanogel for Synergetic Cancer Therapy

Polymers ◽  
2018 ◽  
Vol 10 (10) ◽  
pp. 1098 ◽  
Author(s):  
Ray Chang ◽  
Wei-Bor Tsai
Keyword(s):  
Cancer Therapy ◽  
Drug Release ◽  
Controlled Drug Release ◽  
Green Laser ◽  
Cancer Drug ◽  
Cell Mortality ◽  
Anti Cancer ◽  
Temperature Stimulus ◽  
Sodium Copper Chlorophyllin ◽  
532 Nm

Temperature stimulus, easy modulation in comparison to other environmental stimuli, makes thermo-responsive nanocarriers popular in the applications of controlled drug release for cancer therapy. In this study, photosensitive sodium copper chlorophyllin (SCC) was incorporated into thermo-responsive polymeric nanogels consisted of N-isopropylacrylamide and N-(hydroxymethyl)acrylamide. Significant heat was generated from the SCC-containing nanogels under the exposure to 532-nm green laser, and resulted in cell mortality. The thermo-responsive nanogel loaded with 5-FU, an anti-cancer drug, released the drug explosively when exposed to green laser. The combination of hyperthermia and temperature-induced drug release via green laser irradiation greatly enhanced cell mortality to a maximal extent. Such photothermo-responsive nanogel possesses a great potential in anti-cancer treatment.

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