Regularities of the Shell Length to the Individual Weight Ratio in Mollusks of the Genus Dreissena (Dreissenidae, Bivalvia) in Volgograd Reservoir

This study aimed to compare the crop yield and some quality-related aspects of the blueberry cultivars Biloxi and Sharpblue in a commercial crop located in Guasca (Colombia). This research was conducted between June and December of 2014, observing two lots with different plant ages at the start of the study: 20 months and 36 months. For 28 weeks, mature fruits were manually harvested and the accumulated yield per plant, the number of fruits, the diameter, the firmness and the total soluble solids (TSS) were determined. The yield of both cultivars was similar in the 20-month-old plants. The 'Sharpblue' 36-month-old plants had an accumulated yield that was 60% higher than that of the 'Biloxi' cultivar due to the fact that they produced a higher number of fruits. In addition, the Sharpblue fruits tended to present higher TSS values. Although both cultivars were similar in terms of firmness, 'Biloxi' stood out more than 'Sharpblue' in the 20-month-old plants. The individual weight and diameter of the fruits were similar for both cultivars.

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Sex-related differences in growth and morphology of blue mussels

Journal of the Marine Biological Association of the United Kingdom ◽

10.1017/s0025315403008269h ◽

2003 ◽

Vol 83 (5) ◽

pp. 1053-1057 ◽

Cited By ~ 9

Author(s):

Suzanne C. Mills ◽

Isabelle M. Côté

Keyword(s):

Shell Length ◽

Weight Ratio ◽

Body Parts ◽

Blue Mussels ◽

Tissue Weight ◽

The North ◽

External Shell ◽

Length Width ◽

Natural And Sexual Selection ◽

Internal Body

The morphology and growth pattern of male and female blue mussels (Mytilus edulis) from the north Norfolk coast, UK, were studied. In allometric terms, the external shell parameters of females grew faster relative to shell length than those of males. In absolute terms, females also grew more quickly than males for all external shell parameters and for most internal body parts. At a given age, females are therefore larger than males. Females had a higher shell to tissue weight ratio and a relatively heavier foot than males. A discriminant function incorporating age, weight and shell length, width, and height correctly sexed 81% of individuals in the sample from which it was derived. Both natural and sexual selection may be involved in the evolution of sexual dimorphism in blue mussels.

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Evaluation of Mechanical Properties and Machinability Analysis of Al 6061 Hybrid Composite

International Journal of Multidisciplinary and Current Research ◽

10.14741/ijmcr/v.6.2.1 ◽

2018 ◽

Vol 6 (02) ◽

Author(s):

P. V. Rajesh ◽

M. Sriram Prasanth ◽

V. Sam Daniel ◽

C. M. Saravanan

Keyword(s):

Corrosion Resistance ◽

Aluminium Alloy ◽

Hybrid Composites ◽

Low Cost ◽

Weight Ratio ◽

High Strength ◽

Matrix Composites ◽

Wear And Corrosion Resistance ◽

The Individual ◽

Machinability Analysis

Aluminium Matrix Composites are extensively used due to their desirable properties like low weight, low cost, high strength to weight ratio, good corrosion resistance, good thermal conductivity and high stiffness. Their applications are diversified in production, thermal, marine and automobile industries. Aluminium is extensively used in ships, aircrafts, cars, electrical wires and household utensils because it is abundant in nature. In the present study, Aluminium alloy Al6061 Hybrid Composites reinforced with Boron carbide and Coconut shell ash are fabricated to replace the individual Aluminium alloy Al6061. For that various tests to determine properties such as strength, hardness, wear and corrosion resistance are conducted on composite samples which make them fit to be used in aircraft window frames by reviewing various literatures. In addition to above, machinability analysis is performed on all the specimens and their surface roughness is measured. Based on the results obtained, we can come to a conclusion that the aluminium composite has superior properties than individual Al6061 alloy.

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Preliminary study on the production of common carp cultured in freshwater river cages

International Journal of Agricultural Research Innovation and Technology ◽

10.3329/ijarit.v4i1.21086 ◽

2014 ◽

Vol 4 (1) ◽

pp. 24-27

Author(s):

AHM Kohinoor ◽

MM Rahman

Keyword(s):

Body Weight ◽

Common Carp ◽

Stocking Density ◽

Protein Diet ◽

Individual Growth ◽

Individual Weight ◽

The Common ◽

Preliminary Study ◽

The Individual ◽

Freshwater River

A preliminary study was conducted to assess the performance of the common carp, cultured in freshwater river of Brahmaputra cages at different stocking densities during November 2011 to March 2012.The stocking densities tested were 80, 100 and 120 fish/m3. Fish were fed a 28% protein diet at the rate of 15-5% of body weight. The result of the study showed that fish in the T1 stocked at the rate of 80 fish/m3 resulted the best individual weight followed by T2 and T3. The productions of fish in T1, T2 and T3 were 22.33±1.20, 19.00±0.58 and 18.00±1.15 kg/m3, respectively. The results of the present study indicated that the best individual growth and production of common carp was obtained at a density of 80 fish/m3. The results also showed that the individual mean harvesting weights were negatively correlated with stocking density. Therefore, the stocking density of 80 fish/m3 is considered optimum for the rearing phase. DOI: http://dx.doi.org/10.3329/ijarit.v4i1.21086 Int. J. Agril. Res. Innov. & Tech. 4 (1): 24-27, June, 2014

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Experimental Analysis on Acoustic, Vibration and Moisture Absorption Properties of Natural Bio-Polymer Composite

Journal of Manufacturing Engineering ◽

10.37255/jme.v16i1pp024-028 ◽

2021 ◽

Vol 16 (1) ◽

pp. 024-028

Author(s):

Nibesh A G ◽

Jebakani D

Keyword(s):

Polymer Composites ◽

Moisture Absorption ◽

Polyester Resin ◽

Weight Ratio ◽

High Strength ◽

Acoustic Vibration ◽

Fish Scale ◽

Composites Materials ◽

The Individual ◽

Screw Pine

Composites Materials- Aircraft, Ship, Automobile. Their most attractive properties are the high strength-to-weight ratio. Polymer composites are used because overall properties of the composites are superior to those of the individual polymers. The natural bio-resin are prepared from neem and Thennamarakudi oil with the concept of polyester resin. The reinforcement is screw pine fibre and fish scale fibre. The aim of this experimental study has targeted to investigate the vibration damping, sound absorption and moisture absorption of reinforced polyester resin polymer composites. The specimen fabricated are naturally bio-degradable and eco-friendly to environment because the resin and fibre are natural ingredients. Mainly to avoid all types of pollution. The laminated specimens were fabricate using hand lay-up technique and the specimens are subjected to the investigated as per the ASTM standards. The Moisture absorption test, Vibration test, Acoustics test were carried out on the laminated specimen to determine their properties.

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Individual Stiffness of 3D Space Frame Thin Walled Structural Joint Considering Local Buckling Effect

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.554.411 ◽

2014 ◽

Vol 554 ◽

pp. 411-415 ◽

Cited By ~ 1

Author(s):

Mohd Shukri Yob ◽

Shuhaimi Mansor ◽

Razali Sulaiman

Keyword(s):

Research Work ◽

Local Buckling ◽

Weight Ratio ◽

Space Frame ◽

Thin Walled Structures ◽

3D Space ◽

Vehicle Structure ◽

Cross Member ◽

Thin Walled ◽

The Individual

Thin walled beams are widely used to build vehicle structure. Thin walled structure offers high stiffness-to-weight ratio to the vehicle for better handling and fuel consumption. Despite these advantages, thin walled structures will expose to the buckling and joint flexibility effects. For a vehicle structure, 3D space frame is used a lot in designing vehicle structure. However, the stiffness of thin joint is difficult to predict accurately by numerical and analytical model due to buckling effect and the complexity of the joint. The essence of this research work is to determine individual stiffness of 3D space frame members using reduction member method. By knowing the individual stiffness of all members, the stiffness of 3D space frame can be predicted easily. This study will help design engineer to optimize vehicle structure with more efficient way rather than trial and error approach. As a case study, structure around bulkhead area which consists of A pillar, sidesill and cross member will be analyzed.

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Phase topology of a NR/BR elastomer blend with active filler

Hemijska industrija ◽

10.2298/hemind0311568p ◽

2003 ◽

Vol 57 (11) ◽

pp. 568-572

Author(s):

Milenko Plavsic ◽

Ivana Pajic-Lijakovic ◽

Branislav Cubric ◽

Radivoj Popovic ◽

Branko Bugarski ◽

...

Keyword(s):

Experimental Data ◽

Mechanical Properties ◽

Weight Ratio ◽

Dispersed Phase ◽

Phase Coupling ◽

Strain Relationship ◽

Series Type ◽

The Individual ◽

Active Carbon Black ◽

Elastomer Blend

The relations between the structure and mechanical properties of a polymer blend of natural (NR) and polybutadiene (BR) rubber (i.e. a NR/BR blend with the weight ratio of the components 70/30) filled with active carbon black were analysed. The properties of the individual phases in the blend were resolved by modeling the stress-strain relationship according to the Bauer procedure for high extensions. The obtained results indicated that BR is the dispersed phase, having a higher modulus, which was also confirmed by the much better fit of the experimental data to the series type of phase coupling according to the Takanayagy theory.

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The Effect of Ammonia Toxicity on Methane Production of a Full-Scale Biogas Plant—An Estimation Method

Energies ◽

10.3390/en14165031 ◽

2021 ◽

Vol 14 (16) ◽

pp. 5031

Author(s):

Sotirios D. Kalamaras ◽

Georgios Vitoulis ◽

Maria Lida Christou ◽

Themistoklis Sfetsas ◽

Spiridon Tziakas ◽

...

Keyword(s):

Reduction Rate ◽

Estimation Method ◽

Weight Ratio ◽

Ammonium Nitrogen ◽

Biogas Plant ◽

Ammonia Toxicity ◽

Ch4 Production ◽

Ammonia Accumulation ◽

Biogas Plants ◽

The Individual

Ammonia accumulation in biogas plants reactors is becoming more frequently encountered, resulting in reduced methane (CH4) production. Ammonia toxicity occurs when N-rich substrates represent a significant part of the biogas plant’s feedstock. The aim of this study was to develop an estimation method for the effect of ammonia toxicity on the CH4 production of biogas plants. Two periods where a biogas plant operated at 3200 mg·L−1 (1st period) and 4400 mg·L−1 (2nd period) of ammonium nitrogen (NH4+–N) were examined. Biomethane potentials (BMPs) of the individual substrates collected during these periods and of the mixture of substrates with the weight ratio used by the biogas plant under different ammonia levels (2000–5200 mg·L−1 NH4+–N) were determined. CH4 production calculated from the substrates’ BMPs and the quantities used of each substrate by the biogas plant was compared with actual CH4 production on-site. Biogas plant’s CH4 production was 9.9% lower in the 1st and 20.3% in the 2nd period in comparison with the BMP calculated CH4 production, of which 3% and 14% was due to ammonia toxicity, respectively. BMPs of the mixtures showed that the actual CH4 reduction rate of the biogas plant could be approximately estimated by the ammonia concentrations levels.

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