Microradiographical Determination of the Dry Mass Density in the Rat Retina1

2009 ◽  
Vol 71 (S208) ◽  
pp. 33c-39c
Author(s):  
Enping Chen ◽  
Jang-Hyun Chung ◽  
Per G. Söderberg ◽  
Bo Lindström
Keyword(s):  
Mass Density ◽  
Dry Mass

Microradiographical Determination of the Dry Mass Density in the Rat Retina

1991 ◽  
Vol 23 (1) ◽  
pp. 33-39 ◽  
Author(s):  
Enping Chen ◽  
Jang-Hyun Chung ◽  
Per G. Söderberg ◽  
Bo Lindström
Keyword(s):  
Mass Density ◽  
Dry Mass ◽  
Rat Retina

scholarly journals Evaluation of Usefulness of the Designed Laboratory Photobioreactor for Microalgae Cultivation in Controlled Conditions

2016 ◽  
Vol 20 (1) ◽  
pp. 13-22
Author(s):  
Beata Brzychczyk ◽  
Zbigniew Kowalczyk ◽  
Jan Giełżecki
Keyword(s):  
Culture Medium ◽  
Dry Mass ◽  
Biomass Growth ◽  
Microalgae Cultivation ◽  
Freshwater Microalgae ◽  
Laboratory Conditions ◽  
Medium Concentration ◽  
Controlled Conditions ◽  
The Impact

AbstractThe objective of the paper was to analyse the use of the designed photobioreactor for freshwater microalgae cultivation in the controlled laboratory conditions. The work covered the design and construction of photobioreactors (PBR) and setting up comparative cultivations of freshwater microalgae chlorelli vulgaris along with determination of the biomass growth intensity for a varied amount of supplied culture medium. It was found out that the constructed PBR may be used for microalgae cultivation in the controlled conditions. The impact of the culture medium amount on the growth of chlorelli vulgaris was proved. As a result of the increase of culture medium concentration to 30.1-120.4 ml·l−1 of water, dry mass in photobioreactorsincreased respectively from 1.33 g·dm−3 to 4.68 g·dm−3.

scholarly journals Effects of plant density and proportion on the interaction between wheat with alexandergrass plants

Bragantia ◽  
2011 ◽  
Vol 70 (1) ◽  
pp. 40-45 ◽  
Author(s):  
Leonardo Bianco de Carvalho ◽  
Pedro Luis da Costa Aguiar Alves ◽  
José Valcir Fidelis Martins
Keyword(s):  
Growth And Development ◽  
Plant Density ◽  
Block Design ◽  
Dry Mass ◽  
Wheat Crop ◽  
Replacement Series ◽  
Mixture Experiment ◽  
Randomized Complete Block Design ◽  
Production Characteristics

Determination of competitive relationships among plant species requires appropriate experimental designs and method of analysis. The hypothesis of this research was that two species growing in coexistence show different growth and development due to their relative competitiveness. This research aims to measure the relative competitiveness of wheat crop compared to Alexandergrass by the interpretation of plant density and proportional effects using replacement series experiments. Monocultures were cultivated in densities of 1, 3, 5, 10 and 15 plants per pot and analyzed by regression of dry mass data. Mixture experiment was cultivated in wheat:Alexandergrass proportions of 0:6, 1:5, 2:4, 3:3, 4:2, 5:1 and 6:0 plants per pot and analyzed by graphical interpretation of growth and production characteristics. Both experiments were carried out in randomized complete block design with four replicates. Alexandergrass was more sensitive to intraspecific competition than wheat. Alexandergrass was lightly more competitive than wheat. Number and weight of spikes and number of tillers were the wheat characteristics more affected by Alexandergrass interference.

scholarly journals Phosphorus fertilization and growth of buffel grass (Cenchrus ciliares L.) cultivars

2015 ◽  
Vol 19 (1) ◽  
pp. 34-38
Author(s):  
Vanderlise Giongo ◽  
Alessandra M. Salviano ◽  
Betina R. C. dos Santos ◽  
Emylly F. Leal
Keyword(s):  
Critical Level ◽  
Dry Mass ◽  
Phosphorus Fertilization ◽  
Critical Levels ◽  
Buffel Grass ◽  
P Accumulation ◽  
P Content ◽  
Phosphorus Requirement ◽  
Set Up

Phosphorus (P) plays an important role in the growth of root system as well as the tillering grass, being fundamental to increase the productivity of these species. The aim of this study was to evaluate the development of buffel grass cultivars and establish critical values of P in plant and soil. The experimental set up was a 4 x 5 factorial scheme (four Cenchrus ciliaris cvs.: Biloela, Aridus, CPATSA 7754 and Pusa Giant, and five doses of P2O5 - 0, 30, 60, 90 and 120 kg ha-1) with four replications. After 90 days of cultivation, dry mass of shoot (DMS) and root (DMR) production and the P accumulation (Pacc) were determined. Soil samples to determine the P content and determination of the critical level (CriLev) were also collected. The cv. Biloela presented lower DMR and DMS production compared to the other cultivars. The cultivares Biloela, Pusa Giant and Aridus showed different critical levels of P in soil and plant, obtained in the greenhouse showing that they have different requirement of this nutrient for their growth. The cultivar CPATSA 7754 showed higher phosphorus requirement and did not permit to establish critical levels with doses used in the present study.

Age-Dependent Acoustic and Microelastic Properties of Red Blood Cells Determined by Vector Contrast Acoustic Microscopy

2012 ◽  
Vol 18 (3) ◽  
pp. 436-444 ◽  
Author(s):  
Esam T. Ahmed Mohamed ◽  
Albert E. Kamanyi ◽  
Mieczysław Pluta ◽  
Wolfgang Grill
Keyword(s):  
Red Blood Cells ◽  
Blood Cells ◽  
Mass Density ◽  
Healthy Person ◽  
Ultrasonic Waves ◽  
Acoustic Microscopy ◽  
Cell Parameters ◽  
Different Ages ◽  
The Individual

AbstractVariations of the mechanical properties of red blood cells that occur during their life span have long been an intriguing task for investigations. The research presented is based on noninvasive monitoring of red blood cells of different ages performed by scanning acoustic microscopy with magnitude and phase contrast. The characteristic signature of fixed cells from groups of three different ages fractionated according to mass density is obtained from the acoustic microscope images, with the data represented in polar graphs. The analysis of these data enables the determination of averaged values for the velocities of ultrasound propagating in the cells from the different groups ranging from (1,681 ± 16) m s−1in the youngest to (1,986 ± 20) m s−1in the oldest group. The determined bulk modulus varies with age from (3.04 ± 0.05) GPa to (4.34 ± 0.08) GPa. An approach to determine for an age-mixed population of red blood cells, collected from a healthy person, the age of the individual cells and the age dependence of the cell parameters including density, velocity, and attenuation of longitudinal polarized ultrasonic waves traveling in the cells is demonstrated.

scholarly journals Innovative application of the moisture analyzer for determination of dry mass content of processed cheese

2018 ◽  
Vol 54 (10) ◽  
pp. 3071-3080 ◽  
Author(s):  
Małgorzata Kowalska ◽  
Sławomir Janas ◽  
Magdalena Woźniak
Keyword(s):  
Dry Mass ◽  
Mass Content ◽  
Processed Cheese

scholarly journals Study of Chlorella vulgaris sedimentation process

2018 ◽  
Vol 240 ◽  
pp. 05023 ◽  
Author(s):  
Agnieszka Patyna ◽  
Małgorzata Płaczek ◽  
Stanisław Witczak
Keyword(s):  
Chlorella Vulgaris ◽  
Dry Mass ◽  
Separation Process ◽  
Cultivation Condition ◽  
Microalgal Biomass ◽  
Algae Biomass ◽  
Algae Cultivation ◽  
Sedimentation Process ◽  
Microalgae Harvesting

The paper reports the results of Chlorella vulgaris sedimentation process including description of cultivation condition of microalgal biomass. The process of algae cultivation was carried out in photobioreactor comprising systems of carbon dioxide supply, mixing and artificial LED illumination. The growth of microalgae was determined alternatively in three ways by measuring the amount of dry mass over time, counting the cells and measurement of optical density by use of a spectrophotometer. Algae biomass with different concentration was subjected to the separation process by gravity. This led to the determination of the characteristic of sedimentation process for different concentrations and cell sizes. The experimental results indicate that sedimentation process offers a tool with a potential application for microalgae harvesting.

scholarly journals Radial Velocity Profiles for Anisotropic Spherically Symmetric Clusters: An Example

1988 ◽  
Vol 126 ◽  
pp. 691-692
Author(s):  
Herwig Dejonghe
Keyword(s):  
Distribution Function ◽  
Radial Velocity ◽  
Velocity Dispersion ◽  
Mass Density ◽  
Distribution Functions ◽  
Spherically Symmetric ◽  
Line Profiles ◽  
Anisotropic Models ◽  
The Family

A 1-parameter family of anisotropic models is presented. They all satisfy the Plummer law in the mass density, but have different velocity dispersions. Moreover, the stars are not confined to a particular subset of the total accessible phase space. This family is mathematically simple enough to be explored analytically in detail. The family is rich enough though to allow for a 3-parameter generalization which illustrates that even when both the mass density and the velocity dispersion profiles are required to be the same, a degeneracy in the possible distribution functions persists. The observational consequences of the degeneracy can be studied by calculating the observable radial velocity line profiles obtained with different distribution functions. It turns out that line profiles are relatively sensitive to changes in the distribution function. They therefore can be considered to be more natural observables when a determination of the distribution function is desired.

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