Branch spiral beam harvester for uni-directional ultra-low frequency excitations.

In recent years, there has been a growing interest in piezoelectric energy harvesting systems, particularly for their potential to recharge or replace batteries in energy-efficient electronic devices and wireless sensor networks. Nonetheless, the conventional linear piezoelectric energy harvesters (PEH) face limitations in ultra-low frequency vibrations (1-10 Hz) due to their narrow operating bandwidth and higher resonance frequencies. To address this, researchers explored compact shaped geometries, with spiral PEH being one such design to lower resonance frequencies by reducing structural stiffness.

Linear Segmented Arc-Shaped Piezoelectric Branch Beam Energy Harvester for Ultra-Low Frequency Vibrations.

Piezoelectric energy harvesting systems have been drawing the attention of the research community over recent years due to their potential for recharging/replacing batteries embedded in low-power-consuming smart electronic devices and wireless sensor networks. However, conventional linear piezoelectric energy harvesters (PEH) are often not a viable solution in such advanced practices, as they suffer from a narrow operating bandwidth, having a single resonance peak present in the frequency spectrum and very low voltage generation, which limits their ability to function as a standalone energy harvester. Generally, the most common PEH is the conventional cantilever beam harvester (CBH) attached with a piezoelectric patch and a proof mass.

[Complementation and function of methyl-metabolic pathway in Streptococcus mutans luxS null strain].

Purpose: To complement the activated methyl cycle (AMC) pathway at an AI-2 defect background in Streptococcus mutans (S. mutans) luxS null strain.

Methods: A sahH gene was amplified from Pseudomonas aeruginosa and introduced into the S.

Characterization of oral bacterial diversity of irradiated patients by high-throughput sequencing.

The objective of this study was to investigate the compositional profiles and microbial shifts of oral microbiota during head-and-neck radiotherapy. Bioinformatic analysis based on 16S rRNA gene pyrosequencing was performed to assess the diversity and variation of oral microbiota of irradiated patients. Eight patients with head and neck cancers were involved in this study.

Exploring the dynamic core microbiome of plaque microbiota during head-and-neck radiotherapy using pyrosequencing.

Radiotherapy is the primary treatment modality used for patients with head-and-neck cancers, but inevitably causes microorganism-related oral complications. This study aims to explore the dynamic core microbiome of oral microbiota in supragingival plaque during the course of head-and-neck radiotherapy. Eight subjects aged 26 to 70 were recruited.

Effects of intensity-modulated radiotherapy on human oral microflora.

This study aimed to evaluate changes in the biodiversity of the oral microflora of patients with head and neck cancer treated with postoperative intensity-modulated radiotherapy (IMRT) or conventional radiotherapy (CRT). Pooled dental plaque samples were collected during the radiation treatment from patients receiving IMRT (n = 13) and CRT (n = 12). Denaturing gradient gel electrophoresis (DGGE) was used to analyze the temporal variation of these plaque samples.

[Influence of Streptococcus mutans luxS gene on polysaccharide matrix metabolism].

Purpose: To investigate the effect of Streptococcus mutans luxS gene on polysaccharide matrix metabolism.

Methods: Based on the immobilization of magnetic beads by adherent cells,an assay of biofilm quantitative analysis was developed for the kinetic quantification of biofilm formation. S.

Modeling of diffusion transport through oral biofilms with the inverse problem method.

Aim: The purpose of this study was to develop a mathematical model to quantitatively describe the passive transport of macromolecules within dental biofilms.

Methodology: Fluorescently labeled dextrans with different molecular mass (3 kD, 10 kD, 40 kD, 70 kD, 2000 kD) were used as a series of diffusion probes. Streptococcus mutans, Streptococcus sanguinis, Actinomyces naeslundii and Fusobacterium nucleatum were used as inocula for biofilm formation.

[Study on the biofilm early formation of Streptococcus mutans luxS gene mutation].

Objective: To investigate the effect of Streptococcus mutans luxS mutarotation on the early biofilm formation.

Methods: Based on the immobilization of magnetic beads by adherent cells, an assay of biofilm quantitative analysis was developed for the kinetic quantification of biofilm formation in this study. Streptococcus mutans luxS mutant strain was constructed and subject to this biofilm luxS mutant strain were compared.

[Identification of P. gingivalis P. intermedia P. nigrescens by 16S rDNA and membrane microarray chip].

Purpose: The aim of this study is to identify three kinds of black-pigmented periodontal pathogens P. gingivalis Pg, P. intermedia Pi, P.

[Susceptibility of Streptococcus mutans biofilm to antimicrobial agents].

Objective: To investigate the susceptibility of Streptococcus mutans (S. mutans) biofilms to antimicrobial agent by confocal laser scanning microscopy (CLSM).

Methods: S.