Comparison of direct and indirect methods of measuring the precursors of β-methyl-γ-octalactone and their application to the analysis of Sessile oak wood [Quercus petraea (Matt.) Liebl.]

2001 ◽  
Vol 905 (1-2) ◽  
pp. 183-191 ◽  
Author(s):  
Eric Masson ◽  
Raymond Baumes ◽  
Jean-Louis Puech
Keyword(s):  
Quercus Petraea ◽  
Indirect Methods ◽  
Oak Wood ◽  
Sessile Oak ◽  
Direct And Indirect Methods

scholarly journals CHANGES IN GROSS CALORIFIC VALUE OF THERMALLY TREATED SCOTS PINE (PINUS SYLVESTRIS L.) AND SESSILE OAK (QUERCUS PETRAEA L.) WOOD AND THEIR EXPLANATION USING FTIR SPECTROSCOPY

Wood Research ◽  
2021 ◽  
Vol 66 (2) ◽  
pp. 243-254
Author(s):  
Emília Orémusová ◽  
Eva Výbohová
Keyword(s):  
Pinus Sylvestris ◽  
Mass Loss ◽  
Ftir Spectroscopy ◽  
Scots Pine ◽  
Calorific Value ◽  
Quercus Petraea ◽  
Gross Calorific Value ◽  
Pine Wood ◽  
Oak Wood ◽  
Sessile Oak

Scots pine (Pinus sylvestris L.) and Sessile oak (Quercus petraea L.) wood were thermally treated in an oven at the temperatures of 160°C, and 200°C under atmospheric pressure in the presence of air for 3 and 9 hrs. The mass loss and gross calorific value were determined. Non-treated wood samples achieved a gross calorific value of 22 193 J.g-1 for pine wood and 19 277 J.g-1 for oak wood. Whereas the calorific value of pine wood with increasing severity of treatment decreased, in the case of oak it increased. The mass loss increased with increasing treatment severity by both wood species. Mentioned differences in pine and oak wood behaviour using ATR-FTIR spectroscopy were explained. In the case of pine wood with increasing temperature and time of exposure a decrease of resin acids was observed. This may be contributed to decrease in GCV. In the case of oak wood, mainly at temperature of 200°C the degradation of hemicelluloses was observed that results in relative increasing in the lignin content with followed increase in the GCV.

Aspects of orthodontic protocol in cleft lip and palate patients

2020 ◽  
Vol 20 (2) ◽  
pp. 137-142
Author(s):  
O. V. Dudnik ◽  
Ad. A. Mamedov ◽  
O. I. Admakin ◽  
A. A. Skakodub ◽  
Y. O. Volkov ◽  
...  
Keyword(s):  
Oral Hygiene ◽  
Orthodontic Treatment ◽  
Cleft Lip ◽  
Cleft Lip And Palate ◽  
Comprehensive Approach ◽  
Maxillofacial Region ◽  
Indirect Methods ◽  
Indirect Bonding ◽  
The Face ◽  
Direct And Indirect Methods

Relevance. Cleft lip and palate is one of the severe malformations of the face and jaw, requiring a comprehensive approach to the rehabilitation of the patients, including doctors of various specialties, one of which is orthodontists. A feature of orthodontic treatment is difficulty of fixing bracket systems, as well as lowering the level of oral hygiene, caused by deformation and displacement of fragments of the maxillofacial region.Purpose. Improving the effectiveness of orthodontic treatment and hygiene of the oral caviti in patients with cleft lip and palate in permanent bite period.Materials and methods. A comparison was made of the effetctiveness of fixing brackets systmes with direct and indirect bonding techniques and the effectiveness of oral hygiene during orthodontic treatment using irrigators.Results. The results of the study showed a difference in the effectiveness of using direct and indirect methods of fixing bracket systems in patients with cleft and palate. The use of irrigators as additional means of oral hygiene has demonstrated a positive dynamic of hygiene indices.Conclusions. Results of the study demonstrate the advantages of fixation the brackets by indirect bonding and use additional hygiene products irrigator for improving of oral hygiene.

scholarly journals A diet high in sugar and fat influences neurotransmitter metabolism and then affects brain function by altering the gut microbiota

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Yinrui Guo ◽  
Xiangxiang Zhu ◽  
Miao Zeng ◽  
Longkai Qi ◽  
Xiaocui Tang ◽  
...  
Keyword(s):  
Gut Microbiota ◽  
Bacterial Strain ◽  
Brain Function ◽  
Intestinal Tract ◽  
High Fat ◽  
Indirect Methods ◽  
Neurotransmitter Secretion ◽  
Direct And Indirect Methods ◽  
Neurotransmitter Metabolism ◽  
Host Brain

AbstractGut microbiota (GM) metabolites can modulate the physiology of the host brain through the gut–brain axis. We wished to discover connections between the GM, neurotransmitters, and brain function using direct and indirect methods. A diet with increased amounts of sugar and fat (high-sugar and high-fat (HSHF) diet) was employed to disturb the host GM. Then, we monitored the effect on pathology, neurotransmitter metabolism, transcription, and brain circularRNAs (circRNAs) profiles in mice. Administration of a HSHF diet-induced dysbacteriosis, damaged the intestinal tract, changed the neurotransmitter metabolism in the intestine and brain, and then caused changes in brain function and circRNA profiles. The GM byproduct trimethylamine-n-oxide could degrade some circRNAs. The basal level of the GM decided the conversion rate of choline to trimethylamine-n-oxide. A change in the abundance of a single bacterial strain could influence neurotransmitter secretion. These findings suggest that a new link between metabolism, brain circRNAs, and GM. Our data could enlarge the “microbiome–transcriptome” linkage library and provide more information on the gut–brain axis. Hence, our findings could provide more information on the interplay between the gut and brain to aid the identification of potential therapeutic markers and mechanistic solutions to complex problems encountered in studies of pathology, toxicology, diet, and nutrition development.

Influence de la densité du couvert forestier sur le développement architectural de jeunes chênes sessiles, Quercus petraea (Matt.) Liebl. (Fagaceae), en régénération forestière

2000 ◽  
Vol 78 (12) ◽  
pp. 1531-1544 ◽  
Author(s):  
Eric Nicolini ◽  
Daniel Barthélémy ◽  
Patrick Heuret
Keyword(s):  
Quercus Petraea ◽  
Growth Unit ◽  
Growth Morphology ◽  
Basal Diameter ◽  
Canopy Density ◽  
Sessile Oak ◽  
The North ◽  
Oak Trees ◽  
Branching Patterns ◽  
Number Of Branches

The growth and branching patterns of the main axis of 6-year-old sessile oak, growing in a natural regeneration in the north of France, were analysed each year retrospectively according to three increasing canopy density conditions: large gap, small gap, and dense canopy. Increasing gap size is associated with an increase in the total height, basal diameter, branching probability, and global polycyclism rate of the trees. At the growth unit or annual shoot level, from dense canopy to large gaps these botanical entities also show an increase in their total length, number of nodes, polycyclism, and branching rate as well as mean number of branches and mean internode length. A discussion of our results revealed some endogenous features of growth and branching patterns in young sessile oak trees. It is also shown that increasing canopy density generally tends to reduce the expression of the endogenous architectural sequence of differentiation of young sessile oak trees. Young trees growing below dense canopy thus seem to be "delayed" in their sequence of differentiation and appear to be in a "waiting" status, whereas young trees growing in large gaps exhibit an architecture very similar to trees growing in nurseries under nonlimiting growth conditions.Key words: architecture, Quercus petraea, growth, morphology, canopy density.

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