Contribution of lipid to the formation of characteristic volatile flavor of peanut oil.

Lipid is an important precursor for volatile flavor formation, but it is not clear how to study the reactions involved in forming key volatile flavor compounds in peanut oil. In this paper, we innovatively established a flavor research model to investigate the contribution of different chemical reactions to the aroma compounds of peanut oil. The results showed that lipid participation in thermal reactions is necessary for forming major aroma compounds in hot-pressed peanut oil. Compared to the Maillard reaction, the lipid oxidation-Maillard reaction produces more compounds with 46 volatile substances identified. During the heating process, six new key substances were formed and the level of unsaturated fatty acids decreased by 7.28%. Among them, linoleic acid may be an important precursor for the formation of aroma components of hot-pressed peanut oil. Our study could provide theoretical guidance for understanding the volatile flavor mechanism of peanut oil and improving volatile flavor.

Applying the reference values of real-ear-to-coupler-difference for deaf and hard-of-hearing children in Taiwan: Cautions and considerations.

Measurement of real-ear-to-coupler differentials (RECDs) is a critical part of the hearing aid (HA) verification process. This study examines the validity of reference RECD values preset by the HA analyzer, Audioscan RM500, for deaf-and-hard-of-hearing (DHH) children in Taiwan. RECD measurements were performed on 658 ears of DHH children. A linear mixed model was used to analyze the reference and measured RECD values. The findings revealed slight disparities between normative RECD values from North America and those observed in Taiwanese DHH children. While generally small (less than 5 dB), these differences imply potential challenges in achieving optimal HA fitting in specific scenarios. Therefore, we recommend individualized RECD/REM measurements for cases of poor auditory performance, certain frequency ranges, or notable variations in ear canal volume. From a clinical perspective, while broadly applicable, the use of North American RECD normative data in Taiwan requires cautious consideration of potential minor variations. This study contributes to current knowledge by affirming the use of a Western RECD database for Taiwanese DHH children. However, we underscore the ongoing importance of individualized HA fitting strategies, particularly for cases with stagnant intervention progress. While built-in RECD reference values can offer preliminary fitting guidance, especially in busy clinical settings, our study sheds light on the circumstances where caution is essential. Audiologists can efficiently allocate their time and effort by focusing on personalized RECD measurements for cases exhibiting suboptimal intervention outcomes, thereby effectively optimizing HA gain settings.

The effectiveness of the promotion of newborn hearing screening in Taiwan.

OBJECTIVE: Hearing is a critical ability for the development of a child's speech and language. Many studies in different countries have shown the universal newborn hearing screening and early intervention has greatly reduced the negative impact caused by congenital hearing loss. The first universal newborn hearing screening program in Taiwan took place in MacKay Memorial Hospital in 1998 and was subsequently endorsed by the government. The incidence of bilateral congenital hearing impairment in Taiwan is approximately 2.6 per 1000 live birth. The aim of this paper is to analyze the age of diagnosis, hearing aid fitting, and intervention of congenitally hearing impaired children with and without hearing screening after public awareness and government endorsement of newborn hearing screening. MATERIALS AND METHODS: There were 263 hearing impaired children participated in this study, receiving their auditory habilitation therapy at Children's Hearing Foundation from 2006 to 2010. 114 of those children went through newborn hearing screening and 149 without it. The age of diagnosis, hearing aid fitting, and auditory intervention were compared between these two groups. The age of diagnosis and intervention of congenitally hearing impaired children among different years were analyzed too. RESULTS: The average age of diagnosis was 8.7 months, the age of hearing aid fitting was 12.4 months and age of auditory intervention was 18.8 months for the group of hearing impaired children with newborn hearing screening. For hearing impaired children without newborn screening, their average age of diagnosis was 27.5 months; age of hearing aid fitting was 31.3 months and age of auditory intervention was 40.5 months. There were significant differences in the age of diagnosis, hearing aid fitting and auditory intervention between congenitally hearing impaired children with and without hearing screening. CONCLUSIONS: This research indicates that newborn hearing screening facilitates early identification, diagnosis and intervention of congenitally hearing impaired children in Taiwan. The age of identification, diagnosis and intervention of congenital hearing impaired children has also been reduced gradually over the years after government endorsement of newborn hearing screening in Taiwan.