Wood, you like this smell? Impact of origin, growth and drying conditions on the smell and general emission profiles of Cembran pine (Pinus cembra L.)

几种木材特别富含挥发性有机化合物（VOCs），并已作出一些努力，以阐明其挥发性成分。这种调查的动机往往是木材和木质材料挥发性排放物对室内空气质量的影响，从而对人体健康的潜在生理影响。因此，木材排放通常被认为是关键的，可能影响气道或引起过敏反应。然而，关于自然性的感知及其对健康的有益影响，木材气味的话题最近越来越受到关注。自然，人类显然被山林和树木的气味所吸引，并寻求与这种气味相关的放松。欧洲赤松（Pinus cembra L.）天然木材是一种特别受欢迎的木材品种，它也被称为瑞士松、阿罗拉松、石松和“阿尔卑斯山皇后”。它通常在中欧用于香料制作，并因其独特和持久的气味而受到重视，这使得它特别适合用于芳香疗法。这种气味与压力缓解有关，通过生理证据表明，这种气味可以降低心率，并且还据报道可以促进健康的睡眠，特别是对于睡在Cembran松木床上的人。然而，只有少量的研究已经解决了从Cembran松树的针叶和球果中获得的精油的组成。Cembran木材产生的气味同样尚未得到全面解决。此外，很少有人知道的影响，环境和干燥的因素，在最初的存储过程中，这种特征木材气味的配置文件。因此，该项目的目的是解决这种据报道有益物质的分子基础。该项目的目标是识别和量化挥发性有机化合物以及气味剂的产生，并建立与一般木材化学参数的关系。在这方面，将使用既定的标准方法对选定的木材样品进行糖和提取物含量及组成的鉴定。此外，来自不同来源以及窑干燥前后的样品将在两个工作组之间的实验室间方法中进行互补分析，包括多维高分辨率以及全面的气相色谱-质谱法（GC-MS），高效液相色谱法，傅立叶变换红外光谱法和硅烷化后液体注射的GC-MS。此外，木粉将通过热解-GC/MS（Py-GC/MS）以及热解吸-GC/MS（TD-GC/MS）进行分析。

A couple of wood species are especially rich in volatile organic compounds (VOCs), and some effort has been made to elucidate their volatile composition. Such investigations have often been motivated with regard to the impact of volatile emissions from wood and wood-based materials on indoor air quality, and hence to their potential physiological effects on human health. Wood emissions have thereby often been considered as critical, potentially impacting the airways or causing allergic effects. However, the topic of wood smell lately gains increasingly attention, with respect to the percept of naturalness and its beneficial influence on wellbeing. Insofar, humans are clearly attracted to the smell of mountain forests and trees, and seek relaxation associated with such smells. Cembran pine (Pinus cembra L.) natural wood is an especially appreciated wood species which is also known as the Swiss pine, Arolla pine, Stone pine, and “Queen of the Alps”. It is commonly used in central Europe for furniture-making and is valued for its characteristic and long-lasting odour, which makes it particularly suitable for its use in aromatherapy. This odour has been related to stress relieve via physiological evidence that the smell has been stated to reduce the heart rate, and has also been reported to promote healthy sleep, particularly for individuals sleeping in Cembran pinewood beds. However, only a small number of studies have addressed the composition of the essential oils obtained from needles and cones from Cembran pine. The odorants produced by Cembran wood have likewise not yet been comprehensively resolved. Moreover, little is known about the impact of environmental and drying factors during initial storage on this characteristic wood odour profile. Accordingly, the aim of this project is to resolve the molecular underpinnings of this reportedly beneficial material. The goal of the project is to identify and quantify VOC as well as odorant generation, and establish the relationships to general wood chemistry parameters. In this respect, selected wood samples will be characterized with regard to sugar and extractives content and composition using established standard methods. Moreover, samples from different origins as well as from before and after kiln-drying will be subjected, in an inter-laboratory approach between the two work groups, to complementary analyses comprising multi-dimensional high-resolution as well as comprehensive gas chromatography-mass spectrometry (GC-MS), high-performance liquid chromatography, Fourier transform infrared spectroscopy and GC-MS with liquid injection after silylation. Furthermore, the wood flour will be analysed via Pyrolysis-GC/MS (Py-GC/MS) as well as Thermodesorption-GC/MS (TD-GC/MS).