The structure of a complex arterial tree model is generated on the computer using the newly developed method of "constrained constructive optimization." The model tree is grown step by step, at each stage of development fulfilling invariant boundary conditions for pressures and flows. The development of structure is governed by adopting minimum volume inside the vessels as target function. The resulting model tree is analyzed regarding the relations between branching angles and segment radii. Results show good agreement with morphometric measurements on corrosion casts of human coronary arteries reported in the literature.

Download full-text PDF

Source
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC2216882PMC
http://dx.doi.org/10.1085/jgp.103.6.975DOI Listing

Publication Analysis

Top Keywords

branching angles
8
model tree
8
angles computer-generated
4
computer-generated optimized
4
optimized models
4
models arterial
4
arterial trees
4
trees structure
4
structure complex
4
complex arterial
4

Similar Publications

Background: Innovation in crop establishment is crucial for wheat productivity in drought-prone climates. Seedling establishment, the first stage of crop productivity, relies heavily on root and coleoptile system architecture for effective soil water and nutrient acquisition, particularly in regions practicing deep planting. Root phenotyping methods that quickly determine coleoptile lengths are vital for breeding studies.

View Article and Find Full Text PDF

The process of establishing relay protection and automation (RPA) settings for electric power systems (EPSs) entails complex calculations of operating modes. Traditionally, these calculations are based on symmetrical components, which require the building of equivalent circuits of various sequences. This approach can lead to errors both when identifying the operating modes and when modeling the RPA devices.

View Article and Find Full Text PDF

Transcriptomics and Plant Hormone Analysis Reveal the Mechanism of Branching Angle Formation in Tea Plants ().

Int J Mol Sci

January 2025

National Centre for Tea Plant Improvement, Tea Research Institute, Chinese Academy of Agricultural Sciences/Key Laboratory of Biology, Genetics and Breeding of Special Economic Animals and Plants, Ministry of Agriculture and Rural Affairs, Hangzhou 310008, China.

The branching angle of tea plants is a key factor in determining their branching structure, which significantly affects yield, suitability for mechanical harvesting, and overall plant architecture. However, the mechanisms underlying branching angle formation in tea plants remain unclear. In this study, we explored the mechanism of branching angle formation in tea plants by analysing the transcriptome and plant hormone levels of tea plant cultivars with different branching angles.

View Article and Find Full Text PDF

A water-soluble polysaccharide from foxtail millet (FM-D1) was isolated and purified through gradient ethanol precipitation and column chromatography. Size-Exclusion Chromatography-Multi-Angle Light Scattering-Refractive Index (SEC-MALLS-RI) and high-performance anion-exchange chromatography (HPAEC) analyses revealed that FM-D1 constitutes a highly purified neutral polysaccharide exclusively composed of glucose as the sugar unit, with a molecular weight of 14.823 kDa.

View Article and Find Full Text PDF

Nervus Intermedius Neuralgia.

Curr Pain Headache Rep

January 2025

Department of Neurology, Barrow Neurological Institute, St. Joseph's Hospital and Medical Center, Phoenix, Arizona, USA.

Purpose Of Review: This review discusses the diagnosis and treatment of nervus intermedius neuralgia (NIN) and identifies gaps in the literature.

Recent Findings: The nervus intermedius is a branch of the facial nerve. NIN presents as a rare neuralgia of this nerve, causing deep ear pain, which may radiate to the auditory canal, auricle, mastoid, soft palate, temple, and angle of the jaw.

View Article and Find Full Text PDF

Want AI Summaries of new PubMed Abstracts delivered to your In-box?

Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!