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headspace seeds

The headspace aroma compounds of the seeds of the “garlic plant” Hua gabonii (Huaceae) from Cameroon were analysed by solid-phase-micro-extraction/gas chromatography/ flame ionization detector (SPME/GC/FID), SPME/GC/mass spectrometry (MS) and olfactoric evaluations. Surprisingly the typical garlic-like aroma of the headspace (SPME) sample is not only the result of well-known disulfides of Allium species, but – in plants with garlic aroma – of hitherto rather rarely identified methyl methylthiomethyl disulfide (2,4,5-trithiahexane) and di-(thiomethylmethyl) disulfide (2,4,5,7-tetrathiaoctane) in concentrations of 23.3% and 21.4% respectively (calculated as percentage peak area of SPME/GC/FID analysis using a non-polar column). As further main compounds (concentrations higher than 1.0%) of this SPME-headspace sample of H. gabonii seeds the monoterpenes p-cymene (1.1%), β-pinene (1.1%), pinocarveol (1.2%), myrtenol (1.3%), 1,8-cineole (1.5%), myrtenal (1.7%), α-terpineol (2.1%), α-pinene (3.6%), α-terpinolene (4.9%), terpinen-4-ol (8.1%) and the sesquiterpenes β-caryophyllene (2.6%) and α-copaene (4.9%) as well as the sulfidic compounds diallyl trisulfide (1.5%), dipropyl trisulfide (1.7%) and methyl propyl tetrasulfide (2.2%), were identified. The characteristic disulfide components of common garlic, like diallyl disulfide, were found only as minor compounds. A correlation of identified volatiles of the H. gaboni seeds responsible for the characteristic garlic aroma with fresh-terpenic notes is additionally given.

Headspace seeds

The study was performed in order to determine the profile of volatile components of the garden angelica (Angelica archangelica L.) and wild angelica (A. sylvestris L.) seeds. The volatile ingredients were isolated by headspace techniques and analyzed by means of gas chromatography‒flame ionization detector (GC‒FID) and gas chromatography‒mass spectrometry (GC‒MS). It was found that A. archangelica seed consists of 29 components among which the dominant is b‒phellandrene (84.7%), followed by α‒phellandrene (3.4%), α‒pinene (2.5%), myrcene (2.1%) and α‒copaene (1.3%). However, the A. sylvestris seed consists of 22 volatile compounds, and the dominant are limonene (62.7%) and α‒pinene (28.0%), followed by camphene (2.6%), α‒phellandrene (2.0%) and b‒pinene (1.0%).

While these benefits can be experienced in all different types of green spaces, using your time in nature to tend to plants can come with an additional set of benefits.

For hundreds of years, across all different cultures and countries, spending time in the great outdoors has been touted as a remedy for an expansive list of health ailments. While a dose of nature is often still brushed off as superstition, immersing yourself in a green landscape comes with a long list of impressive, science-backed benefits.

Researchers have also found that after only 15 minutes in nature, stress and anxiety levels significantly decreased — a finding many likely came to experience firsthand during the COVID-19 pandemic when America’s parks saw a nearly 100% increase in visitors.

One study observed that after just one gardening session, participants reported significantly higher levels of self-esteem and mood, as well as reduced levels of fatigue and depression. Another study makes a connection between gardening and body image, finding that the more time research participants spent in the garden, the more accepting of their body they became.

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In this setting, we might also become more aware and accepting of change

What is mindful gardening?

As seasoned gardeners already know — and those new to gardening are just discovering — there’s something incredibly healing and hopeful about planting seeds and watching them grow. If the garden is a place that offers a sense of peace and pleasure, adding elements of mindfulness to this naturally meditative hobby may make the activity even more impactful on our well-being.

Whether sowing seeds, pruning bushes, or pulling weeds, this environment can serve as an ideal place to practice being fully present, turning our attention entirely to the sights, sounds, smells, and textures of the gardening tasks at hand.