scholarly journals Effects of different types of shelter on physiology and growth of Sangiovese vines during the first year after planting

2019 ◽  
Vol 13 ◽  
pp. 04020
Author(s):  
Giovan Battista Mattii ◽  
Eleonora Cataldo ◽  
Linda Salvi ◽  
Sofia Sbraci ◽  
Francesca Paoli ◽  
...  
Keyword(s):  
Water Potential ◽  
First Year ◽  
Gas Exchanges ◽  
Circular Section ◽  
Stages Of Growth ◽  
Early Stages ◽  
Single Leaf ◽  
Leaf Gas Exchanges ◽  
Different Types ◽  
Sprout Growth

In the early stages of planting, the shelter can provide for young vines protection against damage of various kinds. Despite their widespread use, few surveys have been devoted to the study of innovative shelter types and the possible influence of these protections on the physiology and development of plants. In the present experiment, which took place in 2017 in a Tuscan winery, the effects of vine protections by the company OSO (Prato) on single leaf gas exchanges and on the shoot growth in the first year of planting were studied. Three types of shelters with a circular section (completely perforated, partially perforated and closed) have been compared with the traditional full-wall shelters with square section. During the growing season, sprout growth measures, leaf area, leaf gas exchanges and water potential were carried out on the young vines. At the end of the season, shoots were sampled to measure the dry matter accumulated during the season. Among the shelters taken into consideration, it emerges that the completely perforated type guarantees the best development, with differences that are almost always significant for most of the measured parameters with traditional shelters. On the contrary, the closed typology has led to a reduction in growth, in gas exchanges and in water potential. In conclusion, the type completely perforated could constitute a valid alternative to the traditional one because, besides being a useful means for the protection of the vine, it could benefit the development of the root system in the early stages of growth.

Dynamic evolution of specific catalytic sites on Pt nanoparticles

2016 ◽  
Vol 6 (1) ◽  
pp. 144-151 ◽  
Author(s):  
Hector Barron ◽  
George Opletal ◽  
Richard D. Tilley ◽  
Amanda S. Barnard
Keyword(s):  
Surface Defects ◽  
Pt Nanoparticles ◽  
Catalytic Reactions ◽  
Dynamic Evolution ◽  
Stages Of Growth ◽  
Early Stages ◽  
Catalytic Sites ◽  
Different Types

Different types of surface defects are needed for specific types of catalytic reactions, and can be promoted or suppressed by varying the temperature and rates during the early stages of growth.

Spherulitic crystal growth in the prodissoconch larval of Crassostrea virginica

1983 ◽  
Vol 41 ◽  
pp. 518-519
Author(s):  
George G. Cocks ◽  
Louis Leibovitz ◽  
DoSuk D. Lee
Keyword(s):  
Crystal Structure ◽  
Crassostrea Virginica ◽  
Crystal Orientation ◽  
Developmental Changes ◽  
Gastrula Stage ◽  
Orthorhombic Crystal ◽  
Orthorhombic Crystal Structure ◽  
Stages Of Growth ◽  
Early Stages ◽  
Initial Deposition

Our understanding of the structure and the formation of inorganic minerals in the bivalve shells has been considerably advanced by the use of electron microscope. However, very little is known about the ultrastructure of valves in the larval stage of the oysters. The present study examines the developmental changes which occur between the time of conception to the early stages of Dissoconch in the Crassostrea virginica(Gmelin), focusing on the initial deposition of inorganic crystals by the oysters.The spawning was induced by elevating the temperature of the seawater where the adult oysters were conditioned. The eggs and sperm were collected separately, then immediately mixed for the fertilizations to occur. Fertilized animals were kept in the incubator where various stages of development were stopped and observed. The detailed analysis of the early stages of growth showed that CaCO3 crystals(aragonite), with orthorhombic crystal structure, are deposited as early as gastrula stage(Figuresla-b). The next stage in development, the prodissoconch, revealed that the crystal orientation is in the form of spherulites.

Seed priming with cysteine modulates the growth and metabolic activity of wheat plants under salinity and osmotic stresses at early stages of growth

2016 ◽  
Vol 21 (3) ◽  
pp. 279-286 ◽  
Author(s):  
Fatemeh Nasibi ◽  
Khosrow Manouchehri Kalantari ◽  
Roya Zanganeh ◽  
Ghasem Mohammadinejad ◽  
Hakimeh Oloumi
Keyword(s):  
Metabolic Activity ◽  
Seed Priming ◽  
Stages Of Growth ◽  
Early Stages

Ki -ras point mutation in different types of colorectal carcinomas in early stages

1997 ◽  
Vol 40 (2) ◽  
pp. 161-167 ◽  
Author(s):  
M. Kojima ◽  
F. Konishi ◽  
T. Tsukamoto ◽  
K. Yamashita ◽  
K. Kanazawa
Keyword(s):  
Point Mutation ◽  
Colorectal Carcinomas ◽  
Early Stages ◽  
Different Types

2D versus 3D competition at the early stages of growth for Ge on Si(001) by molecular dynamics

2002 ◽  
Vol 89 (1-3) ◽  
pp. 157-159 ◽  
Author(s):  
P Raiteri ◽  
M Celino ◽  
F Valentinotti ◽  
L Miglio
Keyword(s):  
Molecular Dynamics ◽  
Stages Of Growth ◽  
Early Stages

Morphological variations of Phrosina semilunata Risso, 1822 juveniles (Crustacea: Amphipoda: Hyperiidea), new evidence from the Gulf of Mexico

Zootaxa ◽  
2021 ◽  
Vol 4995 (3) ◽  
pp. 594-600
Author(s):  
MARCO VIOLANTE-HUERTA ◽  
LAURA SANVICENTE-AÑORVE ◽  
MARGARITA HERMOSO-SALAZAR ◽  
AURORA MARRÓN-BECERRA
Keyword(s):  
Gulf Of Mexico ◽  
Monotypic Genus ◽  
Stages Of Development ◽  
Morphological Variations ◽  
Stages Of Growth ◽  
Early Stages ◽  
Southern Gulf Of Mexico ◽  
New Evidence ◽  
Lack Of Knowledge

Lack of knowledge of morphological variations during growth of amphipod crustaceans can result in misidentification of species. In this study, we advance the knowledge of morphological variations of juveniles of the monotypic genus Phrosina Risso, 1822 collected in the oceanic province of the southern Gulf of Mexico. The juveniles differed from the adults mainly in the morphology of pereopods 3 & 4 in that the carpal process is parallel to the propodus, also the rami of the pleopoda consist of only four segments, uropoda 3 are more lanceolate, and the uropoda bear a large prominent spine terminally. These morphological variations have not been described for the species previously. Therefore, the current observations enrich the description of P. semilunata in the early stages of growth and support the need for further taxonomical studiest that could help identify species at different stages of development.  

scholarly journals Key Navigation-Ballistic Technologies for Improving the Efficiency of Spacecraft Control

2021 ◽  
Vol 8 (3) ◽  
pp. 3-10
Author(s):  
А. E. Tyulin ◽  
◽  
V. V. Betanov ◽  
Keyword(s):  
Basic Principles ◽  
Spacecraft Control ◽  
General Classification ◽  
Early Stages ◽  
Technological Cycle ◽  
Efficient Control ◽  
Different Types ◽  
Processing Algorithms

The article focuses on the issues of creating promising space technologies, their general characteristics, and special features. The basic principles for creating and implementing key navigation-ballistic technologies, which help ensure efficient control of spacecraft, are substantiated. A classification of the technologies is proposed based on the characteristics most often used in the area under consideration. Two bar charts of a typical technological cycle of navigation-ballistic support with the possibility of processing a joint sample of measurements of current navigation parameters and recurrent Kalman processing algorithms are analyzed. A variant of a general classification of technologies that allows singling out and correlating different types and classes of technologies is given. This contributes (especially at the early stages) to the improvement of the efficiency of their development.

Sign in / Sign up

Export Citation Format

Share Document