scholarly journals Transformation of the domain pattern in the development of Fagus silvatica L. cambium

2014 ◽  
Vol 61 (3-4) ◽  
pp. 331-341
Author(s):  
Wiesław Włoch ◽  
Piotr Popiel ◽  
Marek Rusin ◽  
Anna Słowioczek
Keyword(s):  
Annual Ring ◽  
Leaf Trace ◽  
First Year ◽  
Checkerboard Pattern ◽  
Regular Pattern ◽  
Domain Pattern ◽  
Longitudinal Line ◽  
Fagus Silvatica ◽  
Gradual Transformation

The domain pattern of cambium during the first year of its function in <i>Fagus silvatica</i> L. resembles a checkerboard. The longitudinal line along the leaf trace, its corresponding line on the opposite side of the internode and nodes comprise the domain borders. Starting from the formation of the first annual ring, this checkerboard pattern begins to undergo gradual transformation. A transitional domain pattern appears during the first few years; in each internode, due to the alternate disappearance of Z and S domains, a fragmentary domain of one type and an expanded domain of the opposite type occur in pairs. After further transformations, a regular pattern of transverse bands of domains moving along the stem appear on older stems (over ten years-old). This pattern is commonly found in other studied species of trees.

scholarly journals Domain pattern in the cambium of young Platanus stems

2015 ◽  
Vol 42 (4) ◽  
pp. 637-648 ◽  
Author(s):  
J. Krawczyszyn
Keyword(s):  
Annual Ring ◽  
Vascular Cambium ◽  
Leaf Trace ◽  
Domain Pattern ◽  
Size And Shape ◽  
Middle Leaf ◽  
The Right

In the vascular cambium of Platanus Z and S domains appear in the course of formation of the first annual ring. Their arrangement is connected with the division of the stem into nodes and internodes. In each node a domain of Z and of S type occurs. The longitudinal boundaries between them run along the middle leaf trace and on its opposite side, and the transverse boundaries lie in the nodes. Z-type domains are found on the right below the base of the nearest upper leaf, and S-type domains on the left. As the young cambium forms further rings, the size and shape of the domains changes.

scholarly journals Anatomical features of axial organs of the loganberry during apex reproduction

2021 ◽  
pp. 161-167
Author(s):  
Людмила Владимировна Петухова ◽  
Елена Николаевна Степанова ◽  
Александра Эдуардовна Кружкова
Keyword(s):  
Annual Ring ◽  
Anatomical Structure ◽  
First Year ◽  
Anatomical Features ◽  
Apical Bud ◽  
Axial Organs

Выяснена особенность в анатомической структуре стебля ежемалины, размножающейся укоренением верхушек побега. В первый год жизни побега при его укоренении активизируется работа камбия, образуется второе годичное кольцо в зоне ксилемы. Стелющиеся побеги ежевик (и ежемалины) следует назвать дициклическими с многолетней верхушечной почкой. The peculiarity in the anatomical structure of the stalk of the loganberry, which reproduces by rooting the tops of the shoot, has been clarified. In the first year of the shoot's life, during its rooting, the work of the cambium is activated, and a second annual ring is formed in the xylem zone. Creeping shoots of blackberries (and loganberries) should be called dicyclic with a perennial apical bud.

scholarly journals Observation of changes of cambial domain patterns on the basis of primary ray development in Fagus silvatica L.

2014 ◽  
Vol 61 (3-4) ◽  
pp. 319-330
Author(s):  
Wiesław Włoch ◽  
Waldemar Szendera
Keyword(s):  
Stem Segment ◽  
Domain Pattern ◽  
Cellular Events ◽  
Fagus Silvatica

The high multiseriate primary rays that occur in young stems of <i>Fagus silvatica</i> L. undergo splitting during cambium development. Segments of the split primary rays remain close to each other and form characteristic strands. Within these strands, sections can be observed in which the rays are split in the same direction, either in configuration Z or S. The configuration of other cambial cellular events neighboring the primary rays under consideration is in agreement with the configuration of the splitting of these rays. The arrangement of the rays on the surface of the wood after debarking a young stem makes it possible to decipher the domain pattern on a surface of any given size. As the stem segment ages, the borders between domains migrate and new borders are formed, changing their course from longitudinal to transverse.

Changes in role perceptions by first-year dental students

1977 ◽  
Vol 41 (8) ◽  
pp. 507-510 ◽  
Author(s):  
AC Rosen ◽  
M Marcus ◽  
N Johnson
Keyword(s):  
Dental Students ◽  
First Year ◽  
Role Perceptions

Relationship of stress and performance among first-year dental students

1986 ◽  
Vol 50 (5) ◽  
pp. 264-267 ◽  
Author(s):  
GH Westerman ◽  
TG Grandy ◽  
JV Lupo ◽  
RE Mitchell
Keyword(s):  
Dental Students ◽  
First Year ◽  
And Performance ◽  
Relationship Of

Effects of Gender, Parental Role, and Time on Infant- and Adult-Directed Read and Spontaneous Speech

2019 ◽  
Vol 62 (11) ◽  
pp. 4001-4014
Author(s):  
Melanie Weirich ◽  
Adrian Simpson
Keyword(s):  
Parental Involvement ◽  
Gender Identity ◽  
Spontaneous Speech ◽  
First Year ◽  
Space Size ◽  
Vowel Space ◽  
Potential Impact ◽  
Phonetic Features ◽  
And Gender ◽  
Description Task

Purpose The study sets out to investigate inter- and intraspeaker variation in German infant-directed speech (IDS) and considers the potential impact that the factors gender, parental involvement, and speech material (read vs. spontaneous speech) may have. In addition, we analyze data from 3 time points prior to and after the birth of the child to examine potential changes in the features of IDS and, particularly also, of adult-directed speech (ADS). Here, the gender identity of a speaker is considered as an additional factor. Method IDS and ADS data from 34 participants (15 mothers, 19 fathers) is gathered by means of a reading and a picture description task. For IDS, 2 recordings were made when the baby was approximately 6 and 9 months old, respectively. For ADS, an additional recording was made before the baby was born. Phonetic analyses comprise mean fundamental frequency (f0), variation in f0, the 1st 2 formants measured in /i: ɛ a u:/, and the vowel space size. Moreover, social and behavioral data were gathered regarding parental involvement and gender identity. Results German IDS is characterized by an increase in mean f0, a larger variation in f0, vowel- and formant-specific differences, and a larger acoustic vowel space. No effect of gender or parental involvement was found. Also, the phonetic features of IDS were found in both spontaneous and read speech. Regarding ADS, changes in vowel space size in some of the fathers and in mean f0 in mothers were found. Conclusion Phonetic features of German IDS are robust with respect to the factors gender, parental involvement, speech material (read vs. spontaneous speech), and time. Some phonetic features of ADS changed within the child's first year depending on gender and parental involvement/gender identity. Thus, further research on IDS needs to address also potential changes in ADS.

Supervision: Supervision and Clinical Practicum in Telepractice

2011 ◽  
Vol 21 (1) ◽  
pp. 30-34 ◽  
Author(s):  
Sena Crutchley
Keyword(s):  
North Carolina ◽  
Pilot Project ◽  
First Year ◽  
University Of North Carolina ◽  
Speech Language Pathology ◽  
Support Personnel ◽  
Clinical Practicum ◽  
Training Support ◽  
Language Pathology ◽  
The University

This article describes how a telepractice pilot project was used as a vehicle to train first-year graduate clinicians in speech-language pathology. To date, six graduate clinicians have been trained in the delivery of telepractice at The University of North Carolina at Greensboro. Components of telepractice training are described and the benefits and limitations of telepractice as part of clinical practicum are discussed. In addition, aspects of training support personnel involved in telepractice are outlined.

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