جستجوی مقالات مرتبط با کلیدواژه "antioxidants" در نشریات گروه "علوم دام"

Sperm cryopreservation has become an indispensable tool in reproductive biology. However, maintaining fertility in frozen sperm is very important. The aim of this study is to investigate the effects of selenium nano-particles on the storage of dog semen at 4 ˚C during a period of 48 hours. In this study, 20 ejaculates were collected from 4 mix dogs and diluted in a Tris-based diluent. Then, they were divided into 4 parts in control and treated with 0.5, 1 and 1.5 µg selenium nano-particles groups. Sperm parameters including evaluation of total and progressive motility sperm, motility characteristics and viability of sperm were evaluated for 48 hours. The obtained results showed that in concentrations of 1 µg [progressive sperm (27.03±1.48), total motility (49.48±1.27) and viability (41.40±1.03)] and 0.5 µg [progressive sperm (30.76±1.67), total motility (53.18±1.54) and viability (43.15±1.58)] of selenium nanoparticles compared to the control group, but in the concentration of 1.5 µg was lower than the control group (p< 0.05). As a result, the present study showed that adding selenium nanoparticles in concentrations of 0.1 and 0.5 µg to dog semen can improve the parameters of dog semen after liquid storage, but in concentrations of 1.5 µg it causes toxic effects and overall agitation. And it reduces sperm viability.

Artificial insemination is one of the most accessible techniques for raising domestic animals. It has been proven that refrigeration significantly reduces the quality of sperm. The aim of this study is to investigate the effects of crocin on the storage of dog semen at 4 ºC during a period of 48 hours. In this study, 25 ejaculates were collected from 5 terrier dogs and diluted in a Tris-based diluent. Then, they were divided into 5 parts in control, control dissolve (Dimethyl sulfoxide 5%, dissolve of crocin) and treated with 0.5, 1 and 1.5 mM crocin groups. Sperm parameters including evaluation of total motility, progressive motility, motility characteristics and sperm viability were evaluated for 48 hours. The obtained results showed that progressive motility and total motility during 48 hours of storage were significantly higher in 1.5, 1, and 0.5 mM crocin concentrations compared to the control group. Also, the examination of motility characteristics, except for STR, showed that the addition of 1.5 mM crocin significantly improved the characteristics compared to the control group. Investigating sperm viability showed that the addition of 1.5, 1 and 0.5 mM crocin significantly improves sperm viability. As a result, the present study determined that the addition of crocin to dog semen can improve the parameters of dog semen after liquid storage.

Probiotics, to an appropriate extent, are defined as living microorganisms with beneficial properties that have been accepted for both treatment and prevention of pathogens. The aim of this study was to investigate the effects of a diet containing probiotics on hematology and oxidative stress indices in Dareshoor mares.

For this purpose, 5 horses were fed a diet containing probiotic Bio-Equine (10 g per day) for one month. Blood samples were taken before and after taking probiotics. In stages, complete blood count (Hematocrit, Red blood cell, White blood cell, and percentage of each), serum malondialdehyde levels, total antioxidant capacity, and glutathione peroxidase and superoxide dismutase enzymes were measured. The obtained data were analyzed using t-test statistical method.

The results showed that the addition of probiotics to the diet had no effect on hematocrit and red blood cell count, but the number of white blood cells and the percentage of neutrophils and lymphocytes in the blood of horses increased with probiotic nutrition, although this increase was not significant (P>0.05). Consumption of probiotics for one month led to an increase in serum antioxidant status, although this increase was only significant for glutathione peroxidase (P<0.001).

Overall, the results showed that the addition of Bio-Equine probiotics to the diet improved the immunity and antioxidant activity of saline horses.

The present study was aimed to evaluate temporal changes in milk fatty acids and antioxidants of Saanen goat in response to berberine (BBR) supplementation during the transition period. Twenty-four primiparous Saanen dairy goats were used from 21 days before predicted parturition to 21 days after kidding. Experimental treatments were included: 1) control (without BBR supplement), 2) control + 1 g/d BBR, 3) control + 2 g/d BBR and 4) control + 4 g/d BBR. Body condition score (BCS) and body weight (BW) of individual goats were measured on days -21, -14, -7, 0, 7, 14 and 21 relative to parturition. Also, milk samples were harvested at days 0, 7, 14 and 21 following parturition. The results showed that dry matter intake (DMI), BCS and milk yield were increased with supplementation of 2 and 4 g/d BBR (P≤0.05). Milk lactose was also enhanced with increased BBR ingestion (P≤0.05). BBR consumption caused changes in milk fatty acids (FAs) profile in accordance with the energy balance. By supplementing 2 and 4 g/d BBR in transition goats, the level of de novo FAs were increased and free fatty acids (FFAs) were decreased (P≤0.05). BBR supplementation was also associated with a decrease in C18:1n9 fatty acid. The level of milk malondialdehyde (MDA) in goats supplemented with 2 and 4 g/d BBR was also decreased (P≤0.05). The total antioxidant capacity (TAC) as well as the level of glutathione peroxidase (GSH-Px), superoxide dismutase (SOD) and catalase (CAT) enzymes in the milk of goats fed 2 and 4 g/d BBR was higher than the control (P≤0.05). In summary, these results showed that BBR supplementation as a new therapeutic strategy in transition period could improve lactation performance, energy balance, and milk antioxidant indicators.

This experiment was conducted to evaluate the effects of adding different levels of cinnamon powder (CNP) on production performance and egg quality traits of laying hens in wheat–based diets. In this experiment 168 White Leghorn laying hens with 60 week age and average weight of 1550 grand average production of 65% was assigned to 7 treatment with 6 replications and 4 birds each based on completely randomized design. Experimental diets were formed as follows: control diet based on wheat-soybean, control diet + 0.05% antibiotics, control diet + 0.05% xylanase enzyme ,control diet + 0.05% vitamin E, diet + 1% CNP, control diet + 2% CNP and control diet + 3% CNP. The results showed that all experimental treatments except antibiotics increased egg production compared to control treatment (P <0.05). None of the experimental treatments had a significant effect on the eggs weight. Treatments containing CNP, vitamin E, and the xylanase enzyme significantly increased the egg mass (P <0.05). Treatments containing CNP and vitamin E significantly reduced feed conversion ratio (FCR) (P <0.05). The effect of experimental treatments on most egg quality traits was not significant. The results showed that the use of 2% CNP in the diet of laying hens leads to improved performance and egg storage durability.

foods functional and their natural products include a wide range of foods that have the potential to improve health and prevent disease due to bioactive components. Sesame (Sesame indicum) belongs to the Pedaliaceae family and is one of the oldest oilseeds that was first cultivated in Africa and then in India. Sesame contains a significant amount of physiological active ligands (up to 1.5%), Includes lipid-soluble lignans such as cisamine and cisamulin, furfuran, episysamine, and cisaminol glycosides and water-soluble lignans such as triglycoside and monoglucoside.Sisamin lignans in sesame oil has many antioxidant properties.In addition to lignans, sesame seeds also contain tocopherols, mainly gamma tocopherols as antioxidants.Polyphenols are a group of secondary plant metabolites that act as neutralizing free radicals, LDL cholesterol oxidation inhibitors, and DNA breakdowns.Research has also shown that the phenolic content of black sesame is higher than that of white sesame.Sesame seeds are effective in reducing blood lipid and improve lipid profile due to dietary fiber, linoleic acid and lignans. During the defatting of sesame seeds by mechanical method (cold pressed) partially defatted sesame meal is produced, which during the recent years the production of these by products in the country increased.Sesame meal, due to its high protein content, can be a good protein source for replacing other edible protein sources, including cottonseed meal and soybean meal in livestock feeding.The meals used in this experiment contain 39% protein and 24% fat, and can be used especially for replacing with soybean meal insheep feed.Few studies have evaluated the effect of using sesame meal on sheep nutrition.Therefore, the inclusion of sesame meal in sheep feed will in part help producers reduce the impact of the global increase in feed costs. The purpose of this study was to determine the effect of sesame meal on performance, blood factors and improve antioxidant activity in fattening lambs.Therefore, the inclusion of sesame meal in sheep feed will in part help producers reduce the impact of the global increase in feed costs. The purpose of this study was to determine the effect of sesame meal on performance, blood factors and improve antioxidant activity in fattening lambs.

Twenty-one male lambs with an initial body weight of 30 ± 3 kgwere used in a completely randomized design for an 60-day feeding experiment with a 15-day adaptation period. Experimental treatments included: 1-control diet based (without Sesame meal), 2-diet with 6 % Sesame meal, 3-diet with 12 % Sesame meal.The experimental diets were set using SRNS software (NRC2007). The feed was completely mixed and was given to livestock twice a day at 8:00 am and 4:00 pm. Lambs were weighed on the first day and then every two weeks.In the last week of the experiment, after morning meal (2 hours later), some rumen fluid was removed by the pump and filtered, and then the pH and ammonia nitrogen were measured.At the end of the experimental period, lambs were slaughtered. Sampling of longissimusmusclewas performed between 12th and 13th ribs from the left halves of each carcass. Samples of muscle were dissected and ground to homogeneity for determination of antioxidant Factors.Also blood samples of each animal were centrifuged and stored in the freezer to measure blood and antioxidant parameters. blood parameters (glucose, cholesterol, triglyceride, urea, albumin, total protein, HDL, LDL, ASAT, ALAT, creatinine) in plasma by using Pars test laboratory kits (Gesan Chem 200 , Italy)Measured. Plasma MDA was measured by the method of Palasser et al. (1996). MDA muscle was measured according to Steering and Chisman (1990). Total antioxidant capacity (TAC) was measured by FRAP method provided by Bensi et al. (1996).Measurement of fatty acids of sesame meal was done by Fulch et al. (1957). Chemical composition including dry matter, crude protein, crude fat and ash was measured by AOAC method (1990) and cell wall with van soest method (1991).

The results of this experiment showed that the use of sesame meal had no effect on feed intake, weight gain and feed conversion ratio, and rumen parameters were not affected by experimental diets.In the present study, plasma glucose concentration did not change between the two treatments supplemented with sesame meal compared to the control treatment. Unchanged blood glucose between diets containing sesame and control diets indicates that sesame has no negative effects on insulin receptors, glucogenesis, glycolysis and glucose oxidation process. In this experiment, HDL level was increased in the experimental treatments, which was significant in the 6% sesame meal treatment compared to the control treatment. Oleic Acid in Sesame Oil Increases High Density Lipoprotein HDL. In human medicine, increasing HDL is a desirable goal in human health because HDL has a negative relationship with heart disease Sesame meal had no effect on serum protein components. In the present study, there was no significant difference between the three experimental treatments in AST and ALT activity. The trans-amination process involves the intermolecular transfer of the amine group from an amino acid donor to a keto acid receptor without the formation of ammonia intermediates. Transaminase plays an important role in mediating metabolism when it provides a means for the synthesis and degradation of amino acids in living cells. The two aminotrans above ALT, AST, occur in almost all animals and humans, but their activity varies considerably in different tissues. The highest AST activity was in the heart while the highest ALT activity was in the liver. Hepatocellular injury results in elevated serum levels of both enzymes (AST and ALT), but overall ALT is more specific in liver injury than AST. Liver function evaluation can be performed by estimating ALT, AST, and ALP activities that are originally present at higher concentrations in the cytoplasm. These enzymes leak into the bloodstream to the extent of liver damage. An increase in the level of serum marker enzymes is one of the most sensitive indicators of liver injury. Sesame meal acts as an important mediator of enzymatic resistance in fat-rich diets that results in obesity and diabetes through its ability to reduce the enhanced activity of ALT, AST and ALP enzymes at the cellular level. Use of sesame meal at 12% level resulted in an increase in total antioxidant capacity and malondialdehyde reduction in muscle. Overall, high intake of natural antioxidants transfers these molecules to tissues, thereby increasing the total antioxidant capacity. Photochemical compounds such as polyphenols (flavonoids, phenolic acids, lignans, phytoestrogens) are glucosinolates and carotenoids. Despite the potential importance of lignans in reducing the risk of disease and cancer, little is known about the metabolic fate of these compounds.

Finally, the use of sesame meal in livestock feeding is a way to reduce feed costs. In addition, the transfer of beneficial ingredients to animal products, while helping the livestock's health, can be used as aenriched food in human nutrition.

This study was designed to add the reduced glutathione to a lecithin nanoparticle-based extender and evaluate the quality of bull sperm after freezingand thawing. In the present study, the effect of four different levels of glutathione (0, 1, 2.5 and 5 mM) in extender-based on lecithin nanoparticles wasevaluated. The lecithin nanoparticles were prepared and the particle size was reduced by using a sonicator device. During three weeks, 48 ejaculatesfrom six Holstein bulls were collected and frozen. Properties evaluated after freezing and thawing were kinetic parameters (CASA), membraneactivity (HOST), membrane integrity (eosin-nigrosine) and morphology (Hancock solution). The results showed that using 2.5 mM glutathione in theextender significantly increased total and progressive motility (63.38±1.5 and 43.1±1.1 respectively, P <0.05). The results of eosin-nigrosine stainingand Host test showed that the highest viability and cell membrane functionality were related to 2.5 mM treatment (64.8±1.5 and 58.1±1.1 respectively)(P<0.05). In general, 2.5 mM glutathione could improve the quality of bull sperm compared with other concentrations after freezing and thawingprocess. It seems that the 2.5 mM glutathione is optimum concentration for bull extender based on the lecithin nanoparticles.

Nowadays, acceptance of chicken meat as a healthy cheap meat resulted in massive consumption between consumers; consequently, higher production with higher quality and shelf life is of the main future goals of this industry (Morrissey et al. 1994). Poultry products and processing technology have become widely available and used worldwide, which leads to expanding competition in the meat production sector. Thus, success in poultry production is strongly associated with improvement in carcass growth and yield. It is mainly associated with an increase in the proportion of breast meat and a decrease in abdominal fat. While, high poly-unsaturated fatty acid content of the meat, make chicken meat prone to deteriorate during storage. So, any suggestion to achieve the industry targets including better growth performance, higher immunity condition, efficient gut function and higher meat quality is valuable. Antioxidants and antimicrobial agents are of feed additives for broiler diets that can enhance bird health and consequently can enhance food safety and quality (Cherian et al. 2013). But, because of international limitations on most antibiotic feed additives and global consumer concerns on the use of such additives, the poultry industry is looking for new alternatives with antimicrobial activities (Cherian et al. 2013). Efficacious, environmentally friendly and consumer favorable feed additives are necessary to poultry meat production. Many researches have been started on these alternatives and some of these alternatives include ionophores, prebiotics, synbiotics, acidifiers, organic acids, and nowadays medicinal plants and phytogenic. Recently, herbs or plant extracts with antioxidant capacity have received much attention. Also, the global demand for natural products from the poultry industry is rising. So, the industry has faced with popularity of using plant-based feed additives or phytogenics. Natural antioxidant compounds exist in these feed additives, can enhance lipid oxidative stability that results in better meat quality features (Aziza et al. 2010). Artemisia annua from the Asteraceae family is an annual weedy herb with global distribution originated.  The herb is native to Asia and especially known as Qinghao in China, and now has become extensively distributed all over the world. The dried leaves of A. annua have been used in traditional medicine for treating malaria-infected patients (Torabi Goodarzi et al. 2006). Anticoccidial and antiparasitic effects of the Asteraceae family have been approved in poultry and ruminant nutrition, respectively (Brisibe et al. 2008). A sesquiterpene lactone called artemisinin is the main compound representing the antiparasitic effects of A. annua and contains an endoperoxide bridge. Besides, further 40 different bioactive compounds including, flavonoids, phenolics, purines, lipids, and other aliphatic compounds exist in A.annua leaves (Brisibe et al. 2009; Ferreira and Janick. 1994). So, the purpose of this study was to investigate the nutritional effects of different levels of Artemisia annua on performance, carcass composition and oxidative stability of Japanese quail meat.

The research was conducted in the teaching and research farm of Gorgan University of Agricultural Sciences and Natural Resources, Faculty of Animal Sciences. The Artemisia annua plant was collected from around Gorgan in the late October and early November of 2018. The leaves of the plant were carefully separated and then, placed in a desiccator at 70 ° C for 48 hours. The dried leaves were powdered by electric grinding and kept in nylon in a closed package. A portion of the leaf powder was sent to the laboratory for analysis of its elements. To determine the effect of Artemisia annua on performance, carcass characteristics and oxidative stability of Japanese quail meat, a total of 375 Japanese quails were allocated in a completely randomized design with 5 treatments and 5 replicates (with 15 birds per each replicate). Birds were fed with zero, 0.5, 1, 1.5, and 2% Artemisia annua diet for 42 days. Diets were based on corn and soybean and were adjusted according to Poultry Nutrition Requirement Tables (NRC, 1994) using the UFFDA dietary software. In this study, growth performance (including weight gain, feed intake and feed conversion ratio) was calculated weekly. For this purpose, the feed intake was measured by subtracting the amount of feed left at the end of each week from the initial feed amount. Also, the mean birds weight of each replicate was subtracted from the mean weight at the beginning of the week and divided by the number of birds in that treatment in order to measure weekly weight gain. The feed conversion ratio was calculated by dividing the weight gain by feed intake. At 42 days of age, two birds were slaughtered from each pen to determine the carcass characteristics percentage (edible carcass, breast, thigh, liver and heart) and the malondialdehyde level in the breast and thigh tissues. Malondialdehyde was evaluated by the TBA method. All data were analyzed based on a completely randomized design by the GLM procedure of SAS (9.2). Tukey multiple range test was used to study the differences between treatment means.

Weight gain was not affected by dietary treatments. Supplementing 2% of Artemisia annua in the quail’s diet resulted in a significant decrease in feed intake during the last two weeks of production period (P<0.05). Gholamrezaie Sani et al., (2013) reported that broilers that received a diet containing Artemisia annua leaf powder had less feed intake compared to the control treatment they linked the reduced feed intake to the high fiber of Artemisia annua. Feed conversion ratio was not affected by dietary treatments, too. Cherian et al. (2013) reported that quails that received diets containing 2 and 4 g/kg Artemisia annua had no significant difference in final body weight and weight gain with the control group. Also, Khalaji et al. (2011) reported that diets containing 1% Artemisia annua had no effect on final body weight and weight gain.  Live weight as well as the weight of the breast, liver and heart were not different between treatments. The highest and the lowest carcass weight were observed in control and 2% Artemisia annua treatments, respectively (P<0.05). Malondialdehyde concentration in treatments containing 1.5% and 2% Artemisia were significantly different from other treatments (P<0.05). According to the results of malondialdehyde concentration in thigh muscles, a significant difference between treatments was seen (P<0.05). The highest level of malondialdehyde concentration in the thigh muscles was observed in chickens received control diet (0.769 mg / kg) and the lowest level (0.556 mg / kg) was seen in quails supplemented with 1.5% Artemisia annua. Also, the highest concentration of malondialdehyde in breast muscles was observed in the control treatment (0.961 mg / kg); while, the lowest level of malondialdehyde was seen in the breast muscles of chicks consumed diet containing 2% of Artemisia (0.638 mg / kg).

The results showed that feeding 2%of Artemisia annua in Japanese quail could increase their performance through reducing abdominal fat and increasing their meat quality by delaying in MDA production in thigh and breast muscles.

The aim of this study was to evaluate the effect of Tribulus terrestris powder on thyroid hormones (T3 &T4) and IGF-I concentrations in blood serum of Arabi male lambs. For this purpose, 18 Arabi male lambs with an average age of 3 months and average weight of 16.14 ± 2 kg were used in a completely randomized design with 3 treatments and 6 replications per treatment for 5 months. Experimental treatments included the zero (control), 15 and 30 gr/kg of Tribulus Terrestris powder in diet. The weights of lambs were measured monthly. At the age of 4-8 months, 5 consecutive samples were collected monthly to measure serum T3, T4 and IGF-I concentrations. The results showed thatTribulus terrestris powder had no significant effect on body weight. The concentrations of T3 and T4 were higher in lambs treated with Tribulus terrestris powder compared to control group (p<0.05). Concentrations of T3 at the age of 7 months and T4 at 8 months of age in lambs fed 30g/kg of Tribulus terrestris were significantly higher than control group (p<0.05). IGF-I concentration in lambs feed with 15g/kg of Tribulus terrestris at the age of 6 months was higher than control group (p<0.05). In general, the results of this study showed that feeding of 15 g/kg of Tribulus terrestris powder in Arabi male lamb diet by modulating thyroid hormones and IGF-1 and improving the reproductive system, prevents the reduction of sexual behavior and failure of reproductive activity.

The objective of this experiment was to study the effects of dietary nano-selenium supplementation on the glutathione peroxidase activity and sperm quality and quantity parameters of Arabian rams. In this experiment, twelve Arabian rams with an average weight of 73±3 kg and age of two to four years were used. Animals were divided into three groups: the control group (without -nano Selenium) and two experimental groups that received 0.4 and 0.8 mg nano-selenium per kg dry matter, respectively. The results showed that significant increase in semen selenium concentration and semen glutathione peroxidase activity in group 0.8 mg nano-selenium compared with the control group (P