نتایج جستجو برای: physicochemical phenomena

تعداد نتایج: 149336  

Journal: :Seikagaku. The Journal of Japanese Biochemical Society 2016
Masao Iwamori

Glycolipids are the hybrid molecules constructing with hydrophilic carbohydrate and hydrophobic chains , and show the unique physicochemical properties and bioactivities . Their carbohydrate moieties are characteristically altered in relation to cellular proliferation , differentiation and transformation, and recently , the glycolipid associated with cellular differentiation is clarified to car...

2012
Hasan M. Yildiz

BARRIER PROPERTIES OF MUCUS Hasan M. Yildiz, Chemical Engineering, Northeastern University Mucus, a complex network consisting of microand nano-scale fluid-filled domains formed via mucin glycoprotein interactions, provides a barrier through which nutrients and orally delivered drugs must penetrate before entering the circulatory system. Mucus provides a significant, yet poorly characterized ba...

Journal: :Artificial life 2008
Martin M. Hanczyc Takashi Ikegami

We have developed a simple chemical system capable of self-movement in order to study the physicochemical origins of movement. We propose how this system may be useful in the study of minimal perception and cognition. The system consists simply of an oil droplet in an aqueous environment. A chemical reaction within the oil droplet induces an instability, the symmetry of the oil droplet breaks, ...

Journal: :Microelectronics Reliability 2014
C. Y. Khor Mohd Zulkifly Abdullah Chun-Sean Lau I. A. Azid

The rapid development of computing software has facilitated multifarious research in integrated circuit (IC) packaging. Complicated and complex processes can be visualized via simulation modeling with this software. The applications of aided software enhance the fundamental physicochemical understanding and visualization of the IC encapsulation process. In this article, fluid–structure interact...

2017
Imke A. B. Pijpers Loai K. E. A. Abdelmohsen David S. Williams Jan C. M. van Hest

Biodegradable nanoarchitectures, with well-defined morphological features, are of great importance for nanomedical research; however, understanding (and thereby engineering) their formation is a substantial challenge. Herein, we uncover the supramolecular potential of PEG-PDLLA copolymers by exploring the physicochemical determinants that result in the transformation of spherical polymersomes i...

2001
Jonathan AD Wattis Peter V Coveney

We study in detail the application of renormalisation theory to models of cluster aggregation and fragmentation of relevance to nucleation and growth processes. We investigate the Becker-Döring equations, originally formulated to describe and analyse non-equilibrium phase transitions, and more recently generalised to describe a wide range of physicochemical problems. In the present paper we ana...

2016
Koyel Chakravarty D C Dalal

Local drug delivery has received much recognition in recent years, yet it is still unpredictable how drug efficacy depends on physicochemical properties and delivery kinetics. The purpose of the current study is to provide a useful mathematical model for drug release from a drug delivery device and consecutive drug transport in biological tissue, thereby aiding the development of new therapeuti...

2005
Constantine T. Dervos Christos D. Paraskevas Panayotis D. Skafidas Panayota Vassiliou

This work investigates the use of a specially designed cylindrical metal cell, in order to obtain complex permittivity and tanδ data of highly insulating High Voltage (HV) transformer oil samples. The data are obtained at a wide range of frequencies and operation temperatures to demonstrate the polarization phenomena and the thermally stimulated effects. Such complex permittivity measurements m...

Journal: :The International journal of oral & maxillofacial implants 1998
J Wiltfang H A Merten J H Peters

In an experimental study using the Göttingen minipig, Gore-Tex, Gore Resolut, and Vicryl barrier membranes were tested for their efficacy in guided bone regeneration. The results were compared to those of autologous periosteum. The strongest reossification was seen in the bone defects covered with Gore-Tex; however, time-dependent disintegration phenomena, which had already been observed in pre...

Journal: :Nano letters 2012
Weihua Guan Mark A Reed

Biological ion channels are molecular devices that allow a rapid flow of ions across the cell membrane. Normal physiological functions, such as generating action potentials for cell-to-cell communication, are highly dependent on ion channels that can open and close in response to external stimuli for regulating ion permeation. Mimicking these biological functions using synthetic structures is a...

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