scholarly journals A contribution to the syntaxonomic diversity of the Tazovsky Peninsula, Arctic Russia

2021 ◽  
Vol 10 (1) ◽  
Author(s):  
Michael Yu. Telyatnikov ◽  
◽  
Olga V. Khitun ◽  
Irina V. Czernyadjeva ◽  
Ekaterina Yu. Kuzmina ◽  
...  
Keyword(s):  
Southern Tundra ◽  
High Degree ◽  
First Time ◽  
Degree Of Similarity ◽  
Arctic Russia

Syntaxonomic diversity of the vegetation in the southern tundra subzone of the Tazovsky Peninsula is represented by six associations, three subassociations and three variants. Four associations (Dicrano maji–Salicetum lanatae Khitun ass. nov. hoc loco, Sphagno girgensohnii–Betuletum nanae Khitun ass. nov. hoc loco, Empetro subholarctici– Eriophoretum vaginati Khitun ass. nov. hoc loco, Eriophoro leiocarpi–Caricetum rotundatae Khitun ass. nov. hoc loco), the three subassociations (Hierochloo alpinae– Hylocomietum splendentis empetretosum subholarctici Khitun subass. nov. hoc loco, Eriophoro leiocarpi–Caricetum rotundatae typicum Khitun subass. nov. hoc loco, Eriophoro leiocarpi–Caricetum rotundatae caricetosum chordorrhizae Khitun subass. nov. hoc loco) and the three variants are described for the first time. A high degree of similarity was found between vegetation of the Tazovsky Peninsula and vegetation of the southern part of the Gydansky Peninsula (the typical tundra subzone). They have four of six associations in common, whereas with the northern part of the typical tundra there is only one association in common.

scholarly journals Headspace volatiles isolated from twigs of Picea omorika from Serbia

2020 ◽  
Vol 72 (3) ◽  
pp. 445-452
Author(s):  
Biljana Nikolic ◽  
Jovana Ljujic ◽  
Srdjan Bojovic ◽  
Zorica Mitic ◽  
Nemanja Rajcevic ◽  
...  
Keyword(s):  
Natural Populations ◽  
Headspace Volatiles ◽  
Specialized Metabolites ◽  
Degree Of Separation ◽  
Germacrene D ◽  
Picea Omorika ◽  
High Degree ◽  
First Time ◽  
Two Populations ◽  
Degree Of Similarity

The variability of volatiles isolated from twigs by the static headspace (HS) method in seven natural populations of Picea omorika from Serbia was investigated for the first time. In the overall chemical profile, monoterpenes strongly dominated hydrocarbons as the most volatile compounds (95.7%). The dominant compounds were ?-pinene (29.5 %), ?-pinene (25.7%) and myrcene (13.0%), totaling 68.2% of the volatiles on average. The following nine volatiles were found to be present in medium-to-high amounts (0.5-10%): tricyclene, camphene, ?-phellandrene, ?-3-carene, p-cymene, ?-phellandrene, terpinolene, (E)-caryophyllene, and germacrene D. Out of the 78 volatiles detected, the six most abundant (?-pinene, ?-pinene, myrcene, ?-3-carene, ?-phellandrene and camphene) were selected for principle component analysis (PCA) and cluster analyses (CA). PCA revealed a high degree of similarity between populations, while CA showed a degree of separation of two populations from the others. The presented results are in agreement with previous phytochemical and molecular analyses of this species that confirm high variability in both specialized metabolites and genetic markers.

Ampelography - An old technique with future uses: the case of minor varieties of Vitis vinifera L. from the Balearic Islands

OENO One ◽  
2011 ◽  
Vol 45 (3) ◽  
pp. 125 ◽  
Author(s):  
Sonia Garcia-Muñoz ◽  
Gregorio Muñoz-Organero ◽  
María Teresa De Andrés ◽  
Félix Cabello
Keyword(s):  
Vitis Vinifera ◽  
Balearic Islands ◽  
Vegetative Period ◽  
Qualitative And Quantitative ◽  
Mature Leaves ◽  
High Degree ◽  
First Time ◽  
Degree Of Similarity ◽  
Somatic Mutant

<p style="text-align: justify;"><strong>Aims</strong>: We report the genetic, phenological, agronomic and ampelographic characterization of 27 minor grapevine accessions (<em>Vitis vinifera </em>L.) from the Balearic Islands (Spain). The influence of occasional climatic phenomena (hailstorm) and the ampelographer’s experience on these characteristics was studied.</p><p style="text-align: justify;"><strong>Methods and results</strong>: In 2006 and 2007, grapevine accessions were analyzed using 57 OIV (Office International de la Vigne et du Vin) qualitative and quantitative descriptors and six microsatellite loci (SSR). Ampelography is a good preliminary technique for the identification of plant material, since the ampelographic description carried out showed a high degree of similarity between the repetitions of one single accession (higher than 90%), confirming the microsatellite results. The colour of the young leaf’s upper side (OIV-051), the juiciness of the flesh (OIV-232) and the firmness of berry flesh (OIV-235) were the most difficult characters to distinguish by ampelographers. In spite of the greater similarity found among the varieties studied, there were a few strong discriminant characters (OIV-225, OIV-084, OIV-053, and OIV-004). In addition, the ampelographic descriptions, agronomic parameters and phenology were influenced by hailstorm.</p><p style="text-align: justify;"><strong>Conclusions</strong>: The combination of morphological and molecular characterizations of 27 accessions collected in the Balearic Islands (Spain) allowed their classification into 17 different vine varieties. The genetic analysis identified Beba blanca as a possible somatic mutant derived from Beba roja. The hailstorm increased the vegetative period and mostly affected mature leaves, bunches, agronomic characteristics and must composition.</p><p style="text-align: justify;"><strong>Significance and impact of the study</strong>: The present work characterizes, for the first time, the ampelographic and molecular profiles of these minor varieties. It is provide agronomic information about old cultivars never published before which could be interesting for the grape growers.</p>

Genetic Diversity of Basil (Ocimum spp. - Lamiaceae) Based on RAPD Markers and Volatile Oil Constituents

HortScience ◽  
1998 ◽  
Vol 33 (3) ◽  
pp. 492f-493
Author(s):  
Roberto F. Vieira ◽  
James E. Simon ◽  
Peter Goldsbrough ◽  
Antonio Figueira
Keyword(s):  
Genetic Diversity ◽  
Molecular Markers ◽  
Rapd Markers ◽  
Volatile Oil ◽  
Essential Oil Composition ◽  
Oil Composition ◽  
Traditional Medicines ◽  
The Tropics ◽  
High Degree ◽  
First Time

Essential oils extracted from basil (Ocimum spp.) by steam distillation are used to flavor foods, oral products, in fragrances, and in traditional medicines. The genus Ocimum contains around 30 species native to the tropics and subtropics, with some species naturalized and/or cultivated in temperate areas. Interand intraspecific hybridization have created significant confusion in the botanical systematics of this genus. Taxonomy of basil (O. basilicum) is also complicated by the existence of numerous varieties, cultivars, and chemotypes within the species that do not differ significantly in morphology. In this study we are using RAPD markers and volatile oil composition to characterize the genetic diversity among the most economically important Ocimum species. We hypothesize that the genetic similarity revealed by molecular markers will more accurately reflect the morphological and chemical differences in Ocimum than essential oil composition per se. Preliminary research using five Ocimum species, four undetermined species, and eight varieties of O. basilicum (a total of 19 accessions) generated 107 polymorphic fragments amplified with 19 primers. RAPDs are able to discriminate between Ocimum species, but show a high degree of similarity between O. basilicum varieties. The genetic distance between nine species and among 55 accessions within the species O. americanum, O. basilicum, O. campechianum, O. × citriodorum, O. gratissimum, O. kilimandscharium, O. minimum, O. selloi, and O. tenuiflorum will be analyzed by matrix of similarity and compared to the volatile oil profile. This research will for the first time apply molecular markers to characterize the genetic diversity of Ocimum associate with volatile oil constituent.

Using Cluster Analysis to Improve Marketing Experiments

1971 ◽  
Vol 8 (3) ◽  
pp. 340-347 ◽  
Author(s):  
George S. Day ◽  
Roger M. Heeler
Keyword(s):  
Cluster Analysis ◽  
Space Representation ◽  
Reduced Space ◽  
High Degree ◽  
Degree Of Similarity ◽  
Sensitive Experiment ◽  
Selection Of

When the selection of a sample of stores or cities requires a high degree of similarity among the test units in order to ensure a sensitive experiment, the sample may no longer represent the market. These conflicting requirements can be satisfied by choosing the sample from clusters displayed in a reduced space representation of the market.

Are Tetranychus macfarlanei Baker & Pritchard and Tetranychus malaysiensis Ehara (Acari: Tetranychidae) one species? Morphological and molecular evidences for synonymy between these two spider mite species and a note on invasiveness of T. macfarlanei on okra and eggplant in India

2017 ◽  
Vol 22 (4) ◽  
pp. 467
Author(s):  
Mahran Zeity ◽  
Nagappa Srinivas ◽  
Chinnamade Channegowde Gowda
Keyword(s):  
Spider Mite ◽  
Morphological Characters ◽  
Molecular Data ◽  
Mite Species ◽  
Coi Gene ◽  
High Similarity ◽  
Mitochondrial Coi ◽  
Mitochondrial Coi Gene ◽  
High Degree ◽  
Degree Of Similarity

Study of morphological characters of Tetranychus macfarlanei Baker & Pritchard and Tetranychus malaysiensis Ehara revealed high similarity by comparing all the important characters in addition to the characters pointed out by Ehara to separate those two species. Molecular phylogeny of seven Indian populations of T. macfarlanei and one population of T. malaysiensis from Philippines along with few distantly related species of Tetranychus was attempted. High degree of similarity between these two species at mitochondrial COI gene (96%) as well as ITS2 (rDNA) (96–99%) region was evident. Based on both morphological features and molecular data, T. malaysiensis is proposed as a junior synonym of T. macfarlanei based on ICZN’s law of priority. Also more female characters are prompted in this study to distinctly discriminate T. macfarlanei from its most resembling species, Tetranychus ludeni Zacher. Tetranychus macfarlanei has emerged as a pest of several cultivated crop plants in India. 

Characterization of SrBi2Nb2O9 Thin Films Prepared by Sol Gel Technique

1996 ◽  
Vol 459 ◽  
Author(s):  
E. Ching-Prado ◽  
W. Pérez ◽  
A. Reynés-Figueroa ◽  
R. S. Katiyar ◽  
D. Ravichandran ◽  
...  
Keyword(s):  
Thin Films ◽  
Raman Band ◽  
Sol Gel ◽  
Orthorhombic Symmetry ◽  
X Ray Diffraction ◽  
Ft Ir ◽  
Gel Technique ◽  
High Degree ◽  
First Time

ABSTRACTThin films of SrBi2Nb2O9 (SBN) with thicknesses of 0.1, 0.2, and 0.4 μ were grown by Sol-gel technique on silicon, and annealed at 650°C. The SBN films were investigated by Raman scatering for the first time. Raman spectra in some of the samples present bands around 60, 167, 196, 222, 302, 451, 560, 771, 837, and 863 cm−1, which correspond to the SBN formation. The study indicates that the films are inhomogeneous, and only in samples with thicknesses 0.4 μ the SBN material was found in some places. The prominent Raman band around 870 cm−1, which is the A1g mode of the orthorhombic symmetry, is assigned to the symmetric stretching of the NbO6 octahedrals. The frequency of this band is found to shift in different places in the same sample, as well as from sample to sample. The frequency shifts and the width of the Raman bands are discussed in term of ions in non-equilibrium positions. FT-IR spectra reveal a sharp peak at 1260 cm−1, and two broad bands around 995 and 772 cm−1. The bandwidths of the latter two bands are believed to be associated with the presence of a high degree of defects in the films. The experimental results of the SBN films are compared with those obtained in SBT (T=Ta) films. X-ray diffraction and SEM techniques are also used for the structural characterization.

The Synthesis and Some Properties of the First Boron-Stabilized Alkenyl Carbanions

1992 ◽  
Vol 45 (1) ◽  
pp. 57 ◽  
Author(s):  
A Pelter ◽  
K Smith ◽  
DE Parry ◽  
KD Jones
Keyword(s):  
Type Structure ◽  
High Degree ◽  
First Time

Calculations indicate a high degree of stabilization of H2BC=CH2 and that it has an allene -type structure H2B=C=CH2. Routes to boron-stabilized alkenyl carbanions have been established for the first time, and alkylation and protonation studies are described.

Jesus in the World of Religions a Preliminary Plotting of a Route Map

1998 ◽  
Vol 5 (3) ◽  
pp. 311-334
Author(s):  
Gerhard Van Den Heever
Keyword(s):  
Comparative Study ◽  
The World ◽  
High Degree ◽  
The Relationship ◽  
Degree Of Similarity

AbstractIn a comparative study the issue is raised about the relationship between the construction of the saviour-image in Christianity, Buddhism, Zoroastrianism and Hinduism. The historical links between these traditions are highlighted and then the article proceeds to argue that when compared, the projections of the images of Jesus and Buddha, Jesus and Zoroaster and Jesus and Krishna exhibit a high degree of similarity. In the process questions are asked about the nature of religion and the value of comparative study.

Dexmedetomidine upregulates the expression of miR-493-5p, inhibiting growth and inducing the apoptosis of lung adenocarcinoma cells by targeting RASL11B

2021 ◽  
pp. 1-8
Author(s):  
Bo Xu ◽  
Yiling Qian ◽  
Chunxiao Hu ◽  
Yongsheng Wang ◽  
Hong Gao ◽  
...  
Keyword(s):  
Lung Adenocarcinoma ◽  
Luciferase Reporter ◽  
Adenocarcinoma Cell Line ◽  
Expression Levels ◽  
Lung Adenocarcinoma Cell Line ◽  
Adenocarcinoma Cells ◽  
Reporter Assays ◽  
Lung Adenocarcinoma Cells ◽  
High Degree ◽  
Degree Of Similarity

Numerous studies have indicated that microRNAs (miRNAs) play critical roles in the development and progression of cancer. However, how changes to the expression levels of miRNAs in response to dexmedetomidine affects the progression of lung cancer remains poorly understood. In this study, we treated the lung adenocarcinoma cell line-A549 with dexmedetomidine and then examined the changes to the expression levels of miRNAs. We found that one of the most significantly upregulated miRNAs was miR-493-5p, which has an important role in the growth and apoptosis of lung adenocarcinoma (LUAD) cells. In addition, bioinformatics searches and luciferase reporter assays revealed that miR-493-5p targets RASL11B, which has a high degree of similarity to RAS. Finally, database searches revealed that RASL11B is associated with survival of LUAD cells. In conclusion, dexmedetomidine causes changes to the expression levels of miRNAs in LUAD, including significant upregulation of miR-493-5p. MiR-493-5p targets RASL11B, thereby inhibiting cell growth and inducing apoptosis in LUAD.

scholarly journals Origin, Traject and Distribution of Renal Arteries (Arteriae renalis) in Chinchilla lanigera

2018 ◽  
Vol 75 (1) ◽  
pp. 129
Author(s):  
Cristian MARTONOS ◽  
Cristian DEZDROBITU ◽  
Florin STAN ◽  
Aurel DAMIAN ◽  
Alexandru GUDEA
Keyword(s):  
Renal Artery ◽  
Renal Arteries ◽  
Left Renal Artery ◽  
Lateral Part ◽  
Formaldehyde Solution ◽  
Anatomical Dissection ◽  
The Right ◽  
High Degree ◽  
Aorta Abdominalis ◽  
Degree Of Similarity

For the present study a number of 5 female chinchilla carcasses were used. The animals were slaughtered for commercial purpuses (fur). The anatomical dissection started with the identification of the aorta (Aorta abdominalis). The next step was the intra-arterial injection of a colouring substance. The carcasses was fixed in the formaldehyde solution and subsequently the renal arteries were dissected. The first renal artery was the right renal artery (Arteria renalis dextra) and, at 0,5 cm caudally, the left renal artery (Arteria renalis sinister) arose . The origin of those arteries were disposed on the lateral part of the abdominal aorta.The origin, traject and distribution of renal arteries on the studied species have a high degree of similarity with the literature dates described for leporids.

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