The Role of Molecular Forces in the Mechanism of Swelling of High Polymers. II. Kinetics of Swelling

1954 ◽  
Vol 27 (3) ◽  
pp. 607-614 ◽  
Author(s):  
V. E. Gul
Keyword(s):  
Chemical Nature ◽  
Three Dimensional ◽  
Molecular Characteristics ◽  
Spatial Structures ◽  
Molecular Forces ◽  
Kinetics Of ◽  
Molecular Compounds ◽  
Kinetics Of Swelling ◽  
High Polymers

Abstract 1. The rate of swelling of high-molecular compounds is a function of the chemical nature and geometric structure of the components of the mixture. 2. In an investigation of the molecular mechanism of swelling of high polymers having highly developed spatial structures, theoretical variations of the rate of swelling with the degree of swelling and molecular characteristics of the components of the mixture were derived for cases where the limiting rate is that of three-dimensional deformation of the specimen in the swelling process, and for the case where the slowest process is the diffusion penetration of the solvent. 3. It is shown that, in both the above-mentioned cases, the rate of swelling depends essentially on the values of the specific cohesion energies of the components of the mixture.

scholarly journals Endosome–mitochondria interactions are modulated by iron release from transferrin

2016 ◽  
Vol 214 (7) ◽  
pp. 831-845 ◽  
Author(s):  
Anupam Das ◽  
Sagarika Nag ◽  
Anne B. Mason ◽  
Margarida M. Barroso
Keyword(s):  
Epithelial Cells ◽  
Three Dimensional ◽  
Time Lapse ◽  
Iron Release ◽  
Iron Transfer ◽  
Distance Transformation ◽  
Stochastic Optical Reconstruction Microscopy ◽  
Optical Reconstruction ◽  
Kinetics Of

Transient “kiss and run” interactions between endosomes containing iron-bound transferrin (Tf) and mitochondria have been shown to facilitate direct iron transfer in erythroid cells. In this study, we used superresolution three-dimensional (3D) direct stochastic optical reconstruction microscopy to show that Tf-containing endosomes directly interact with mitochondria in epithelial cells. We used live-cell time-lapse fluorescence microscopy, followed by 3D rendering, object tracking, and a distance transformation algorithm, to track Tf-endosomes and characterize the dynamics of their interactions with mitochondria. Quenching of iron sensor RDA-labeled mitochondria confirmed functional iron transfer by an interacting Tf-endosome. The motility of Tf-endosomes is significantly reduced upon interaction with mitochondria. To further assess the functional role of iron in the ability of Tf-endosomes to interact with mitochondria, we blocked endosomal iron release by using a Tf K206E/K534A mutant. Blocking intraendosomal iron release led to significantly increased motility of Tf-endosomes and increased duration of endosome–mitochondria interactions. Thus, intraendosomal iron regulates the kinetics of the interactions between Tf-containing endosomes and mitochondria in epithelial cells.

An Evaluation of the Plane Strain Compression Test. III. Experimental Study of the Friction Test: The Role of the Metallurgical Parameters of Die and Sheet

1982 ◽  
Vol 104 (4) ◽  
pp. 538-544 ◽  
Author(s):  
F. Delamare ◽  
J. Kubie´
Keyword(s):  
Experimental Study ◽  
Shear Stress ◽  
Chemical Nature ◽  
Marked Effect ◽  
Friction Test ◽  
Good Reliability ◽  
Plane Strain Compression Test ◽  
Kinetics Of Formation ◽  
Kinetics Of

This paper deals with the influence of the metallurgical parameters of dies and sheet on the friction shear-stress which could be measured by P.S.C.T. The metallurgical parameters of the dies have a marked effect on the kinetics of formation of transfer layers. The metallurgical parameters of the sheet have an effect both on the kinetics of formation, and the chemical nature of the transfer layers. Many parameters must be controlled to have good reliability in PSCT. Then the results can be correlated with boundary lubrication in cold rolling.

Investigation of the Swelling and Network Parameters of Epoxy Coatings Containing Polyaniline

2017 ◽  
Vol 44 (7) ◽  
pp. 13-16
Author(s):  
V.G. Kurbatov ◽  
E.A. Indeikin
Keyword(s):  
Molar Volume ◽  
Solubility Parameter ◽  
Epoxy Polymer ◽  
Three Dimensional ◽  
Dielectric Permeability ◽  
Polymer Coatings ◽  
Epoxy Coatings ◽  
Dimensional Network ◽  
Kinetics Of ◽  
Kinetics Of Swelling

The kinetics of swelling of epoxy coatings modified with polyaniline is investigated. The influence of the three-dimensional solubility parameter, the dielectric permeability, and the molar volume of solvent on the swelling of epoxy polymer coatings is shown. The parameters of the three-dimensional network for epoxy coatings modified with polyaniline are calculated.

The Role of Three-Dimensional Imaging in Evaluation of the Sinonasal Mass

1996 ◽  
Vol 34 (1) ◽  
pp. 27
Author(s):  
Sue Yon Shim ◽  
Ki Joon Sung ◽  
Young Ju Kim ◽  
In Soo Hong ◽  
Myung Soon Kim ◽  
...  
Keyword(s):  
Three Dimensional ◽  
Three Dimensional Imaging ◽  
Sinonasal Mass

Homogenization and Mass Identity vs. Individual Identity. An Analysis in the Light of the Theory of “The Three Dimensional Spiral of Sense

2016 ◽  
Vol 2 (2) ◽  
pp. 40
Author(s):  
Miriam Aparicio
Keyword(s):  
Three Dimensional ◽  
Individual Identity ◽  
Cognitive Effects ◽  
The Media

This study tests some hypotheses included in the psycho-social-communicational paradigm, which emphasizes the cognitive effects of the media and the role of the psychosocial subject as the recipient

Dysregulation of HOX as a Potential Therapeutic Target in Breast Cancer

2020 ◽  
Vol 27 ◽  
Author(s):  
Ji-Yeon Lee ◽  
Myoung Hee Kim
Keyword(s):  
Breast Cancer ◽  
Hox Genes ◽  
Therapeutic Potential ◽  
Expression Patterns ◽  
Genome Structure ◽  
Control Cell ◽  
Three Dimensional ◽  
Cellular Processes ◽  
Hox Protein

: HOX genes belong to the highly conserved homeobox superfamily, responsible for the regulation of various cellular processes that control cell homeostasis, from embryogenesis to carcinogenesis. The abnormal expression of HOX genes is observed in various cancers, including breast cancer; they act as oncogenes or as suppressors of cancer, according to context. In this review, we analyze HOX gene expression patterns in breast cancer and examine their relationship, based on the three-dimensional genome structure of the HOX locus. The presence of non-coding RNAs, embedded within the HOX cluster, and the role of these molecules in breast cancer have been reviewed. We further evaluate the characteristic activity of HOX protein in breast cancer and its therapeutic potential.

Thermodynamic and Kinetic Investigation of the Solvent Effect on the Oxidation of [Co(en)2SCH2COO]+ with S2O82- In Water-Methanol and Water-tert-Butyl Alcohol Mixtures

1993 ◽  
Vol 58 (5) ◽  
pp. 1001-1006 ◽  
Author(s):  
Oľga Vollárová ◽  
Ján Benko
Keyword(s):  
Transfer Functions ◽  
Activation Parameters ◽  
Butyl Alcohol ◽  
Oxidation Of Co ◽  
Kinetics Of Oxidation ◽  
Tert Butyl ◽  
Tert Butyl Alcohol ◽  
Alcohol Mixtures ◽  
Kinetics Of

The kinetics of oxidation of [Co(en)2SCH2COO]+ with S2O82- was studied in water-methanol and water-tert-butyl alcohol mixtures. Changes in the reaction activation parameters ∆H≠ and ∆S≠ with varying concentration of the co-solvent depend on the kind of the latter, which points to a significant role of salvation effects. The solvation effect on the reaction is discussed based on a comparison of the transfer functions ∆Ht0, ∆St0 and ∆Gt0 for the initial and transition states with the changes in the activation parameters accompanying changes in the CO-solvent concentration. The transfer enthalpies of the reactant were obtained from calorimetric measurements.

Central ossifying fibroma of mandible

2020 ◽  
Vol 13 (12) ◽  
pp. e239286
Author(s):  
Kumar Nilesh ◽  
Prashant Punde ◽  
Nitin Shivajirao Patil ◽  
Amol Gautam
Keyword(s):  
Fibrous Tissue ◽  
Three Dimensional ◽  
Facial Asymmetry ◽  
Ossifying Fibroma ◽  
Mandible Reconstruction ◽  
Three Dimensional Printing ◽  
Osseous Lesion ◽  
Large Size ◽  
Dimensional Printing

Ossifying fibroma (OF) is a rare, benign, fibro-osseous lesion of the jawbone characterised by replacement of the normal bone with fibrous tissue. The fibrous tissue shows varying amount of calcified structures resembling bone and/or cementum. The central variant of OF is rare, and shows predilection for mandible among the jawbone. Although it is classified as fibro-osseous lesion, it clinically behaves as a benign tumour and can grow to large size, causing bony swelling and facial asymmetry. This paper reports a case of large central OF of mandible in a 40-year-old male patient. The lesion was treated by segmental resection of mandible. Reconstruction of the surgical defect was done using avascular fibula bone graft. Role of three-dimensional printing of jaw and its benefits in surgical planning and reconstruction are also highlighted.

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