Concentration dependence of the sol-gel phase behavior of agarose-water system observed by the optical bubble pressure tensiometry.


:We have studied an expansion behavior of pressurized bubbles at the orifice of a capillary inserted in gelator-solvent (agarose-water) mixtures as a function of the gelator concentration in which the phase transition points are included. The pressure (P) -dependence of the radius of the curvature (R) of the bubbles monitored by laser beam has shown a discontinuous decrease in the exponent (m) of the experimental power law R = KΔP-m (K: constant) from 1 to 1/2 and a discontinuous increase in the average surface tension (γave) obtained from the work-area plots of the mixtures exceeding that of pure water (72.6 mN/m) at 0.02 < [agarose] < 0.03 wt%, which is attributed to the disappearance of the fluidity. The apparent surface tension (γapp = ΔP/2 R) of the system in the concentration range of 0.03-0.20 wt% has been analyzed by a modified Shuttleworth equation γapp = σ0 + τln(A/A0), where σ0 is an isotropic constant component and the second term is a surface area (A) -dependent elastic component, in which τ is the coefficient and A0 is the area of the orifice. The analysis has indicated that σ0 coincides with the γapp value of the mixture of 0.02 wt% and the second term at >0.02 wt% is the dominant component. From the appearance of the elastic component and concentration dependence of τ, the plateau of τ for the agarose-water mixtures at 0.03-0.10 wt% (Region II) has been explained to the phase separation giving two-phase mixtures of 0.02 wt% sol and 0.10 wt% gel and the upward inflection of τ at 0.10 wt% has been assigned to an increase in the elasticity of the gel with the increase of the agarose concentration in the range of >0.10 wt% (Region III). On considering the concentration dependence of the surface tension of agarose-water mixtures, the discontinuous and inflection points were assigned to the 1st- and 2nd-order phase transition concentrations of the agarose gel, respectively. Given the results with our tensiometry based on the optical bubble pressure method, distinct gelation points for other systems could be determined both mechanically and thermodynamically which will provide a diagnostic criterion of sol-gel transitions.


Sci Rep


Scientific reports


Ichinose N,Ura H




Has Abstract


2020-02-14 00:00:00












  • Adaptive adipose tissue stromal plasticity in response to cold stress and antibody-based metabolic therapy.

    abstract::In response to environmental and nutrient stress, adipose tissues must establish a new homeostatic state. Here we show that cold exposure of obese mice triggers an adaptive tissue remodeling in visceral adipose tissue (VAT) that involves extracellular matrix deposition, angiogenesis, sympathetic innervation, and adipo...

    journal_title:Scientific reports

    pub_type: 杂志文章


    authors: Chang JC,Durinck S,Chen MZ,Martinez-Martin N,Zhang JA,Lehoux I,Li H,Lin M,Wu J,Bainbridge TW,Ernst JA,Ramani SR,Paduchuri S,Kates L,Solon M,Buechler MB,Castiglioni A,Thai M,Breart B,Modrusan Z,Peterson AS,Turley

    更新日期:2019-06-20 00:00:00

  • Seismic, satellite, and site observations of internal solitary waves in the NE South China Sea.

    abstract::Internal solitary waves (ISWs) in the NE South China Sea (SCS) are tidally generated at the Luzon Strait. Their propagation, evolution, and dissipation processes involve numerous issues still poorly understood. Here, a novel method of seismic oceanography capable of capturing oceanic finescale structures is used to st...

    journal_title:Scientific reports

    pub_type: 杂志文章


    authors: Tang Q,Wang C,Wang D,Pawlowicz R

    更新日期:2014-06-20 00:00:00

  • Assessment of pathological response to therapy using lipid mass spectrometry imaging.

    abstract::In many cancers, the establishment of a patient's future treatment regime often relies on histopathological assessment of tumor tissue specimens in order to determine the extent of the 'pathological response' to a given therapy. However, histopathological assessment of pathological response remains subjective. Here we...

    journal_title:Scientific reports

    pub_type: 杂志文章


    authors: Patterson NH,Alabdulkarim B,Lazaris A,Thomas A,Marcinkiewicz MM,Gao ZH,Vermeulen PB,Chaurand P,Metrakos P

    更新日期:2016-11-14 00:00:00

  • Brew temperature, at fixed brew strength and extraction, has little impact on the sensory profile of drip brew coffee.

    abstract::The brew temperature is widely considered a key parameter affecting the final quality of coffee, with a temperature near 93 °C often described as optimal. In particular, drip brewers that do not achieve a minimum brew temperature of 92 °C within a prescribed time period fail their certification. There is little empiri...

    journal_title:Scientific reports

    pub_type: 杂志文章


    authors: Batali ME,Ristenpart WD,Guinard JX

    更新日期:2020-10-05 00:00:00

  • Systemic oxidative stress is associated with lower aerobic capacity and impaired skeletal muscle energy metabolism in heart failure patients.

    abstract::Oxidative stress plays a role in the progression of chronic heart failure (CHF). We investigated whether systemic oxidative stress is linked to exercise intolerance and skeletal muscle abnormalities in patients with CHF. We recruited 30 males: 17 CHF patients, 13 healthy controls. All participants underwent blood test...

    journal_title:Scientific reports

    pub_type: 杂志文章


    authors: Yokota T,Kinugawa S,Hirabayashi K,Yamato M,Takada S,Suga T,Nakano I,Fukushima A,Matsushima S,Okita K,Tsutsui H

    更新日期:2021-01-26 00:00:00

  • Enhancing radiosensitization in EphB4 receptor-expressing Head and Neck Squamous Cell Carcinomas.

    abstract::Members of the Eph family of receptor tyrosine kinases have been implicated in a wide array of human cancers. The EphB4 receptor is ubiquitously expressed in head and neck squamous cell carcinoma (HNSCC) and has been shown to impart tumorigenic and invasive characteristics to these cancers. In this study, we investiga...

    journal_title:Scientific reports

    pub_type: 杂志文章


    authors: Bhatia S,Hirsch K,Sharma J,Oweida A,Griego A,Keysar S,Jimeno A,Raben D,Krasnoperov V,Gill PS,Pasquale EB,Wang XJ,Karam SD

    更新日期:2016-12-12 00:00:00

  • Social rivalry triggers visual attention in children with autism spectrum disorders.

    abstract::Visual social attention is central to social functioning and learning and may act as a reinforcer. Social rivalry, which occurs when an individual is excluded from dyadic interactions, can promote interspecific learning by triggering attention. We applied it to an animal-assisted intervention, where the behaviour of A...

    journal_title:Scientific reports

    pub_type: 杂志文章


    authors: Grandgeorge M,Gautier Y,Brugaillères P,Tiercelin I,Jacq C,Lebret MC,Hausberger M

    更新日期:2017-08-30 00:00:00

  • Evaluating digestion efficiency in full-scale anaerobic digesters by identifying active microbial populations through the lens of microbial activity.

    abstract::Anaerobic digestion is a common technology to biologically stabilize wasted solids produced in municipal wastewater treatment. Its efficiency is usually evaluated by calculating the reduction in volatile solids, which assumes no biomass growth associated with digestion. To determine whether this assumption is valid an...

    journal_title:Scientific reports

    pub_type: 杂志文章


    authors: Mei R,Narihiro T,Nobu MK,Kuroda K,Liu WT

    更新日期:2016-09-26 00:00:00

  • GABA (γ-aminobutyric acid), as a thermo-protectant, to improve the reproductive function of heat-stressed mungbean plants.

    abstract::Rising global temperatures are proving to be detrimental for the agriculture. Hence, strategies are needed to induce thermotolerance in food crops to sustain the food production. GABA (γ-aminobutyric acid), a non-protein amino acid, can partially protect plants from high-temperature stress. This study hypothesises tha...

    journal_title:Scientific reports

    pub_type: 杂志文章


    authors: Priya M,Sharma L,Kaur R,Bindumadhava H,Nair RM,Siddique KHM,Nayyar H

    更新日期:2019-05-24 00:00:00

  • ZeBRα a universal, multi-fragment DNA-assembly-system with minimal hands-on time requirement.

    abstract::The recently evolved field of synthetic biology has revolutionized the way we think of biology as an "engineerable" discipline. The newly sprouted branch is constantly in need of simple, cost-effective and automatable DNA-assembly methods. We have developed a reliable DNA-assembly system, ZeBRα (Zero-Background Redα),...

    journal_title:Scientific reports

    pub_type: 杂志文章


    authors: Richter D,Bayer K,Toesko T,Schuster S

    更新日期:2019-02-27 00:00:00

  • Turn-off colorimetric sensor for sequence-specific recognition of single-stranded DNA based upon Y-shaped DNA structure.

    abstract::A novel turn-off colorimetric sensor for sequence-specific recognition of single-stranded DNA (ssDNA) was established by combining Y-shaped DNA duplex and G-quadruplex-hemin DNAzyme. A G-rich single-stranded DNA (Oligo-1) displays peroxidase mimicking catalytic activity due to the specific binding with hemin in the pr...

    journal_title:Scientific reports

    pub_type: 杂志文章


    authors: Zhang H,Li X,He F,Zhao M,Ling L

    更新日期:2018-08-13 00:00:00

  • Coarse-grained molecular dynamics studies of the translocation mechanism of polyarginines across asymmetric membrane under tension.

    abstract::Understanding interactions between cell-penetrating peptides and biomembrane under tension can help improve drug delivery and elucidate mechanisms underlying fundamental cellular events. As far as the effect of membrane tension on translocation, it is generally thought that tension should disorder the membrane structu...

    journal_title:Scientific reports

    pub_type: 杂志文章


    authors: He X,Lin M,Sha B,Feng S,Shi X,Qu Z,Xu F

    更新日期:2015-08-03 00:00:00

  • Formants provide honest acoustic cues to body size in American alligators.

    abstract::In many vertebrates, acoustic cues to body size are encoded in resonance frequencies of the vocal tract ("formants"), rather than in the rate of tissue vibration in the sound source ("pitch"). Anatomical constraints on the vocal tract's size render formants honest cues to size in many bird and mammal species, but it i...

    journal_title:Scientific reports

    pub_type: 杂志文章


    authors: Reber SA,Janisch J,Torregrosa K,Darlington J,Vliet KA,Fitch WT

    更新日期:2017-05-12 00:00:00

  • Effect of temperature on accidental human mortality: A time-series analysis in Shenzhen, Guangdong Province in China.

    abstract::Health-risk assessments of temperature are central to determine total non-accidental human mortality; however, few studies have investigated the effect of temperature on accidental human mortality. We performed a time-series study combined with a distributed lag non-linear model (DLNM) to quantify the non-linear and d...

    journal_title:Scientific reports

    pub_type: 杂志文章


    authors: Lian T,Fu Y,Sun M,Yin M,Zhang Y,Huang L,Huang J,Xu Z,Mao C,Ni J,Liu G

    更新日期:2020-05-21 00:00:00

  • Resolving new ultrastructural features of cytokinetic abscission with soft-X-ray cryo-tomography.

    abstract::Mammalian cytokinetic abscission is mediated by the ESCRT membrane fission machinery. While much has been clarified on the topology and kinetics of abscission through high-resolution microscopy, key questions regarding the mechanism of abscission remain open. Here we apply cryogenic soft-X-ray tomography to elucidate ...

    journal_title:Scientific reports

    pub_type: 杂志文章


    authors: Sherman S,Kirchenbuechler D,Nachmias D,Tamir A,Werner S,Elbaum M,Elia N

    更新日期:2016-06-10 00:00:00

  • A novel silkworm infection model with fluorescence imaging using transgenic Trichosporon asahii expressing eGFP.

    abstract::Trichosporon asahii is a pathogenic fungus that causes deep mycosis in patients with neutropenia. Establishing an experimental animal model for quantitatively evaluating pathogenicity and developing a genetic recombination technology will help to elucidate the infection mechanism of T. asahii and promote the developme...

    journal_title:Scientific reports

    pub_type: 杂志文章


    authors: Matsumoto Y,Yamazaki H,Yamasaki Y,Tateyama Y,Yamada T,Sugita T

    更新日期:2020-07-03 00:00:00

  • An ecological method to understand agricultural standardization in peach orchard ecosystems.

    abstract::While the worldwide standardization of agricultural production has been advocated and recommended, relatively little research has focused on the ecological significance of such a shift. The ecological concerns stemming from the standardization of agricultural production may require new methodology. In this study, we c...

    journal_title:Scientific reports

    pub_type: 杂志文章


    authors: Wan NF,Zhang MY,Jiang JX,Ji XY,Hao-Zhang

    更新日期:2016-02-22 00:00:00

  • Advanced maternal age compromises fetal growth and induces sex-specific changes in placental phenotype in rats.

    abstract::Advanced maternal age is associated with an increased risk of pregnancy complications. It programmes sex-specific cardiovascular dysfunction in rat offspring, however the intrauterine mechanisms involved remain unknown. This study in the rat assessed the impact of advanced maternal age on placental phenotype in relati...

    journal_title:Scientific reports

    pub_type: 杂志文章


    authors: Napso T,Hung YP,Davidge ST,Care AS,Sferruzzi-Perri AN

    更新日期:2019-11-28 00:00:00

  • A comparison of traditional and novel metrics to quantify resistance training.

    abstract::Common estimates of external training intensity for resistance exercise do not incorporate inter-set recovery duration, and might not reflect the overall demands of training. This study aimed to assess novel metrics of exercise density (ED) during resistance exercise, and how these related to a physiological marker of...

    journal_title:Scientific reports

    pub_type: 杂志文章


    authors: Marston KJ,Peiffer JJ,Newton MJ,Scott BR

    更新日期:2017-07-17 00:00:00

  • Grazers extend blue carbon transfer by slowing sinking speeds of kelp detritus.

    abstract::Marine plant communities such as kelp forests produce significant amounts of detritus, most of which is exported to areas where it can constitute an important trophic subsidy or potentially be sequestered in marine sediments. Knowing the vertical transport speed of detrital particles is critical to understanding the p...

    journal_title:Scientific reports

    pub_type: 杂志文章


    authors: Wernberg T,Filbee-Dexter K

    更新日期:2018-11-21 00:00:00

  • Emergence of life in an inflationary universe.

    abstract::Abiotic emergence of ordered information stored in the form of RNA is an important unresolved problem concerning the origin of life. A polymer longer than 40-100 nucleotides is necessary to expect a self-replicating activity, but the formation of such a long polymer having a correct nucleotide sequence by random react...

    journal_title:Scientific reports

    pub_type: 杂志文章


    authors: Totani T

    更新日期:2020-02-03 00:00:00

  • Excess protein enabled dog domestication during severe Ice Age winters.

    abstract::Dogs (Canis familiaris) are the first animals to be domesticated by humans and the only ones domesticated by mobile hunter-gatherers. Wolves and humans were both persistent, pack hunters of large prey. They were species competing over resources in partially overlapping ecological niches and capable of killing each oth...

    journal_title:Scientific reports

    pub_type: 杂志文章


    authors: Lahtinen M,Clinnick D,Mannermaa K,Salonen JS,Viranta S

    更新日期:2021-01-07 00:00:00

  • Selective alteration of human value decisions with medial frontal tDCS is predicted by changes in attractor dynamics.

    abstract::During value-based decision making, ventromedial prefrontal cortex (vmPFC) is thought to support choices by tracking the expected gain from different outcomes via a competition-based process. Using a computational neurostimulation approach we asked how perturbing this region might alter this competition and resulting ...

    journal_title:Scientific reports

    pub_type: 杂志文章


    authors: Hämmerer D,Bonaiuto J,Klein-Flügge M,Bikson M,Bestmann S

    更新日期:2016-05-05 00:00:00

  • Effects of the Qinghai-Tibet Railway on the Landscape Genetics of the Endangered Przewalski's Gazelle (Procapra przewalskii).

    abstract::The Przewalski's gazelle (Procapra przewalskii) is one of the most endangered ungulates in the world, with fewer than 2,000 individuals surviving in nine habitat fragments on the Qinghai-Tibet Plateau and isolated by human settlements and infrastructure. In particular, the Qinghai-Tibet railway, which crosses the larg...

    journal_title:Scientific reports

    pub_type: 杂志文章


    authors: Yu H,Song S,Liu J,Li S,Zhang L,Wang D,Luo SJ

    更新日期:2017-12-21 00:00:00

  • Time dynamics of quantum coherence and monogamy in a non-Markovian environment.

    abstract::The time evolution of the distribution and shareability of quantum coherence of a tripartite system in a non-Markovian environment is examined. The total coherence can be decomposed into various contributions, ranging from local, global bipartite and global tripartite, which characterize the type of state. We identify...

    journal_title:Scientific reports

    pub_type: 杂志文章


    authors: Radhakrishnan C,Chen PW,Jambulingam S,Byrnes T,Ali MM

    更新日期:2019-02-20 00:00:00

  • Liver-specific Repin1 deficiency impairs transient hepatic steatosis in liver regeneration.

    abstract::Transient hepatic steatosis upon liver resection supposes functional relationships between lipid metabolism and liver regeneration. Repin1 has been suggested as candidate gene for obesity and dyslipidemia by regulating key genes of lipid metabolism and lipid storage. Herein, we characterized the regenerative potential...

    journal_title:Scientific reports

    pub_type: 杂志文章


    authors: Abshagen K,Degenhardt B,Liebig M,Wendt A,Genz B,Schaeper U,Stumvoll M,Hofmann U,Frank M,Vollmar B,Klöting N

    更新日期:2018-11-15 00:00:00

  • A clinical investigation treating different types of fibroids identified by MRI-T2WI imaging with ultrasound guided high intensity focused ultrasound.

    abstract::Clinical data from 172 cases of uterine fibroids with different appearances on MRI-T2WI and accepted ultrasound guided high intensity focused ultrasound (USgHIFU) treatment were retrospectively analyzed. This study aimed to evaluate the clinical safety and efficacy of ablating different types of fibroids, classified b...

    journal_title:Scientific reports

    pub_type: 杂志文章


    authors: Zhao WP,Zhang J,Han ZY,Yao JP,Zhou X,Liang P

    更新日期:2017-09-07 00:00:00

  • The feasibility and stability of large complex biological networks: a random matrix approach.

    abstract::In the 70's, Robert May demonstrated that complexity creates instability in generic models of ecological networks having random interaction matrices A. Similar random matrix models have since been applied in many disciplines. Central to assessing stability is the "circular law" since it describes the eigenvalue distri...

    journal_title:Scientific reports

    pub_type: 杂志文章


    authors: Stone L

    更新日期:2018-05-29 00:00:00

  • Generation and characterization of rat liver stem cell lines and their engraftment in a rat model of liver failure.

    abstract::The rat is an important model for liver regeneration. However, there is no in vitro culture system that can capture the massive proliferation that can be observed after partial hepatectomy in rats. We here describe the generation of rat liver stem cell lines. Rat liver stem cells, which grow as cystic organoids, were ...

    journal_title:Scientific reports

    pub_type: 杂志文章


    authors: Kuijk EW,Rasmussen S,Blokzijl F,Huch M,Gehart H,Toonen P,Begthel H,Clevers H,Geurts AM,Cuppen E

    更新日期:2016-02-26 00:00:00

  • Log-normal diameter distribution of Pd-based metallic glass droplet and wire.

    abstract::We have studied the formation of Pd42.5Cu30Ni7.5P20 metallic glass droplets and wires in the gas atomization process. We demonstrate that the sizes of droplets and wires can be distinguished by the Ohnesorge number (Oh), which is the proportion of the spinnability to the capillary instability, and the diameter distrib...

    journal_title:Scientific reports

    pub_type: 杂志文章


    authors: Yaginuma S,Nakajima C,Kaneko N,Yokoyama Y,Nakayama KS

    更新日期:2015-06-01 00:00:00