Administration of extract Salix tetrasperma combined with extract of turmeric and neem to improve eggs quality of chicken reared under heat stress

The research was conducted to study the effect of heat stress on carcass characteristics and meat quality in indigenous sheep. Nine sheep were divided into three groups which were almost similar in age, sex and weight. Three groups were divided as zero hour (T0), four hours (T4) and eight hours (T8) heat exposure to direct sunlight. During experimental period temperaturehumidity index (THI) value was calculated as 27.09 which indicated T4 and T8 groups were subjected to heat stress condition for at least four hours and eight hours respectively every day. Slaughter weight, body length and heart girth had no significant difference among the treatment groups. Dry matter, ash and ether extract had no significant difference (p>0.05) among the treatment groups but crude protein were increased with the increase of heat stress from T0 to T8 group (p<0.05). Drip loss was increased (p<0.05) in non-exposure group than treated groups but there is no significant result (p>0.05) found in pH and cooking loss. Carcass weight and eye muscle area had no significant difference (p>0.05) among the treatment groups but dressing percentage was decreased with the increase of time in heat treated groups (p<0.01). Significant difference (p<0.05) were found in weight of heart, kidney, lung + trachea and pluck between control and heat treated groups. The significant difference (p>0.05) in empty gut was found in gut with content and gut fill in heat treated groups. It can be concluded that heat stress had significant changes on carcass characteristics and meat quality of indigenous sheep.DOI: http://dx.doi.org/10.3329/bjas.v43i2.20717 Bang. J. Anim. Sci. 2014. 43 (2): 147-153

Download Full-text

Improvement of antioxidant activities and yield of spring maize through seed priming and foliar application of plant growth regulators under heat stress conditions

Semina Ciências Agrárias ◽

10.5433/1679-0359.2017v38n1p47 ◽

2017 ◽

Vol 38 (1) ◽

pp. 47 ◽

Cited By ~ 2

Author(s):

Ijaz Ahmad ◽

Shehzad Maqsood Ahmed Basra ◽

Muhammad Akram ◽

Allah Wasaya ◽

Muhammad Ansar ◽

...

Keyword(s):

Heat Stress ◽

Grain Yield ◽

Foliar Application ◽

Antioxidant Activities ◽

Foliar Spray ◽

Seed Priming ◽

Chlorophyll Contents ◽

Exogenous Application ◽

Hybrid Maize

Heat stress during reproductive and grain filling phases adversely affects the growth of cereals through reduction in grain’s number and size. However, exogenous application of antioxidants, plant growth regulators and osmoprotectants may be helpful to minimize these heat induced yield losses in cereals. This two year study was conducted to evaluate the role of exogenous application of ascorbic acid (AsA), salicylic acid (SA) and hydrogen peroxide (H2O2) applied through seed priming or foliar spray on biochemical, physiological, morphological and yield related traits, grain yield and quality of late spring sown hybrid maize. The experiment was conducted in the spring season of 2007 and 2008. We observed that application of AsA, SA and H2O2 applied through seed priming or foliar spray improved the physiological, biochemical, morphological and yield related traits, grain yield and grain quality of late spring sown maize in both years. In both years, we observed higher superoxide dismutase (SOD), catalase (CAT) and peroxidase (POD) activity in the plants where AsA, SA and H2O2were applied through seed priming or foliar spray than control. Membrane stability index (MSI), relative water contents (RWC), chlorophyll contents, grain yield and grain oil contents were also improved by exogenous application of AsA, SA and H2O2 in both years. Seed priming of AsA, SA and H2O2was equally effective as the foliar application. In conclusion, seed priming with AsA, SA and H2O2 may be opted to lessen the heat induced yield losses in late sown spring hybrid maize. Heat tolerance induced by ASA, SA and H2O2 may be attributed to increase in antioxidant activities and MSI which maintained RWC and chlorophyll contents in maize resulting in better grain yield in heat stress conditions.

Download Full-text

Feedlot growth, carcass characteristics and meat quality of hair breed male lambs exposed to seasonal heat stress (winter vs. summer) in an arid climate

Meat Science ◽

10.1016/j.meatsci.2020.108202 ◽

2020 ◽

Vol 169 ◽

pp. 108202

Author(s):

Ulises Macías-Cruz ◽

Oscar R. Saavedra ◽

Abelardo Correa-Calderón ◽

Miguel Mellado ◽

Noemí G. Torrentera ◽

...

Keyword(s):

Heat Stress ◽

Meat Quality ◽

Carcass Characteristics ◽

Arid Climate ◽

Seasonal Heat

Download Full-text

Influence of grinding size of the main cereal of the diet on egg production and eggs quality of brown egg laying hens from 33 to 65 weeks of age

Poultry Science ◽

10.3382/ps/pey098 ◽

2018 ◽

Vol 97 (7) ◽

pp. 2506-2515 ◽

Cited By ~ 1

Author(s):

J. Herrera ◽

B. Saldaña ◽

L. Cámara ◽

J.D. Berrocoso ◽

G.G. Mateos

Keyword(s):

Egg Production ◽

Laying Hens ◽

Egg Laying ◽

Eggs Quality

Download Full-text

Heat Stress Affects the Physiological and Biochemical Quality of Dalbergia nigra Seeds in vitro

Forest Science ◽

10.1093/forsci/fxab036 ◽

2021 ◽

Author(s):

Ingridh Medeiros Simões ◽

Julcinara Oliveira Baptista ◽

Thuanny Lins Monteiro Rosa ◽

Tamyris de Mello ◽

Caroline Palacio de Araujo ◽

...

Keyword(s):

Climate Change ◽

Heat Stress ◽

Economic Interest ◽

Hypocotyl Length ◽

Sharp Drop ◽

Dalbergia Nigra ◽

Biochemical Quality ◽

Physiological And Biochemical

Abstract The jacaranda of Bahia (Dalbergia nigra (Vell.) Allemão ex Benth) is an endemic tree of a Brazilian neotropical biodiversity hotspot and is of great ecological and economic interest. Given the threat of extinction due to timber overexploitation and climate change, the present study aimed to analyze the physiological and biochemical quality of D. nigra seeds exposed to heat stress. The seeds were sown in a test tube containing woody plant culture medium, kept in a biochemical oxygen demand chamber at 45°C for 0, 24, 48, 72, and 96 hours, and then maintained in the same chamber at 25°C for 30 days. Physiological analyses of moisture, electrical conductivity, germination speed index, normal and abnormal seedlings, seedling length, root length, hypocotyl length, collar diameter, seedling and root dry mass, and Dickson quality index revealed a drop in germination and vigor with prolonged heat stress, dropping from 95% to 0% between 0 and 96 hours. This was accompanied by a reduction in the content of carbohydrates, lipids, and proteins. Therefore, the vigor and quality of seedlings is negatively influenced by exposure to heat stress at 45°C. Study Implications: Dalbergia nigra is a species of high economic interest due to its high-quality wood. In the face of climate change, it is necessary to understand the behavior of seeds under temperature above the ideal. The quality and vigor of seedlings produced in vitro at a temperature of 45°C are negatively affected with the increase in hours of heat stress. In addition, the contents of lipids, carbohydrates, and proteins present in the seed reserves show a sharp drop with heat stress. Ultimately, heat stress significantly affects seed biochemistry and subsequent seedling physiology.

Download Full-text

MATERIAL AND THERMAL ANALYSIS OF LASER SINTERTED PRODUCTS

Acta Mechanica et Automatica ◽

10.2478/ama-2013-0003 ◽

2013 ◽

Vol 7 (1) ◽

pp. 15-19 ◽

Cited By ~ 14

Author(s):

Radovan Hudák ◽

Martin Šarik ◽

Róbert Dadej ◽

Jozef Živčák ◽

Daniela Harachová

Keyword(s):

Thermal Analysis ◽

Heat Stress ◽

Thermal Stresses ◽

Processing Parameters ◽

Sintering Process ◽

Input Processing ◽

Thermal Simulations ◽

The Impact ◽

Selection Of

Abstract Thermal analysis of laser processes can be used to predict thermal stresses and consequently deformation in a completed part. Analysis of temperature is also the basic for feedback of laser processing parameters in manufacturing. The quality of laser sintered parts greatly depends on proper selection of the input processing parameters, material properties and support creation. In order to relatively big heat stress in the built part during sintering process, the thermal simulation and thermal analysis, which could help better understand and solve the issue of parts deformations is very important. Main aim of presented work is to prepare input parameters for thermal simulations by the use of RadTherm software (Thermoanalytics Inc., USA), directly during the sintering process and after the process and find out the impact of the heat stress on a final shape and size of the prototype. Subsequently, an annealing process of constructed products after DMLS could be simulated and specified.

Download Full-text