Mycoplasma pneumoniae infection is usually self-limited without severe sequelae. We report 5 pediatric patients with necrotizing pneumonitis caused by Mycoplasma pneumoniae and reviewed the reported cases in the English language. Protracted course of fever and respiratory distress were noted in all 5 patients. Macrolides and adequate chest tube drainage for pleural effusion were the mainstay of treatment.

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ABSTRACT:The objective of this article is to establish a new method in evaluating photo-polymerization resin reaction behavior, and to use the trends resulting from past evaluation methods and those already known to prove the feasibility of this method. Another objective is to compare the data gathered using the differential photo calorimeter (DPC) method and RPT on different photo-polymerization resin systems to illustrate that the application of RPT on photo-polymerization resin studies is more suitable. Experiment results show that the trends through the real time method using oxide series acrylate research through rigidbody Pendulum Rheometer, the photo-curing behavior under the various parameters of monomer functionality, and photo-initiator concentration can all be observed. Comparing the DPC and RPT methods on polyester acrylate series, when the oligomer of tetra-functional polyester acrylate is added with a different ratio of the monomer of propoxylated neopentyl-glycol di-acrylate, DPC evaluation methods show that the differences in observation are minimal. However, when RPT was applied, not only were the differences in reaction speed observed, but also the differences in crosslinking and other data in the hardening process when the balanced time was achieved during the oscillations procedure.

This study aims to understand the different photocuring behaviors of acrylated polyester by adding different photoinitiators and monomers. Differential photo calorimeter (DPC) is used to understand the exothermal effects during photocuring. The self-catalyst model of dynamic analysis software was then used to obtain the relationships between reaction speed, reaction extent, and rate of reaction. In addition, this study also tried to understand the formation of photocuring resin from the rigid-body pendulum rheometer (RPT) experiment. The results showed that the extent of reaction, conversion rate and speed varies directly with the concentration of the photoinitiator and monomer. The reaction level of propoxylated pentaerithritol triacrylate was higher than propoxylated neopentyl-glycol diacrylate. Moreover, the method using RPT shows better view of the molecule reaction status inside the photopolymer.

ABSTRACT:The study mainly investigates the improvement of the comparative tracking index (CTI) on brominated epoxy resins in a copper clad laminate. We compare the effects of the differences in structures of various epoxy resins on the CTI. In addition, on the basis of the proportion of inorganic fillers and type, we use Pauling's electronegativity theory to find inorganic materials that affect CTI. Experimental results show that the laminate surface CTI increases as the brominated epoxy resin content decreases. When looked at structurally, epoxys modified by phenolic resin systems had lower CTI values than those modified by bisphenol A type epoxy resin systems. Analyzing the effects of inorganic filler types, we found that the ideal bromide epoxy resin proportion and the CTI value of Al(OH) 3 could exceed 600 V.