scholarly journals Microbial Contamination of Beef and Beef Products

2019 ◽  
Vol 2 (2) ◽  
pp. 01-01
Author(s):  
Fahim Shaltout
Keyword(s):  
Amino Acids ◽  
Ascorbic Acid ◽  
Microbial Contamination ◽  
Essential Amino Acids ◽  
Good Source ◽  
Biological Value ◽  
Sodium Calcium ◽  
Different Types ◽  
Beef Products ◽  
Calcium Iron

Beef provide an animal protein of high biological value for consumers at all ages, where they contain all the essential amino acids required for growth. Moreover, beef is good source of different types of vitamins as niacin, riboflavin, thiamine and ascorbic acid as well as sodium, calcium, iron, phosphorus, sulpher and iodine.

scholarly journals Nano urea effects on Pleurotus ostreatus nutritional value depending on the dose and timing of application

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Youssef N. Sassine ◽  
Layla Naim ◽  
Zeina El Sebaaly ◽  
Sami Abou Fayssal ◽  
Mohammed A. Alsanad ◽  
...  
Keyword(s):  
Amino Acids ◽  
Pleurotus Ostreatus ◽  
Nutritional Value ◽  
Essential Amino Acids ◽  
Metal Bioaccumulation ◽  
Sodium Calcium ◽  
Total Carbohydrates ◽  
Heavy Metal Bioaccumulation ◽  
Calcium Iron ◽  
Different Doses

AbstractThe work investigated the effect of Lithovit-Urea50 on the composition of Pleurotus ostreatus (Jacq. Ex Fr.) P. Kumm. (1871) cultivated on spent oyster substrate mixed with wheat straw (1:1, w/w mixture). The product was applied in different doses (C1: 3 g kg−1 and C2: 5 g kg−1) at three distinct timings (t1: at spawning, t2: after first harvest, t3: at spawning and after first harvest). Protein and fiber contents increased respectively by 0.64 and 0.2% in C1t1 and by 0.46 and 0.8% in C2t2 compared to control (C0t0). Total carbohydrates increased by 0.48–3.76%. Sucrose and glucose contents decreased in the majority of treatments, while fructose increased in C2t1 (by 0.045%). Essential amino acids were the highest in C1t1, wherein respective improvement of 0.31, 0.10, 0.05, 0.21, 0.18, and 0.09% compared to C0t0. Similarly, C1t1 was superior in non-essential amino acids. Potassium, sodium, calcium, iron, and copper contents decreased in all treatments, with minor exceptions, zinc decreased in C1t1 and C2t1, while nickel and lead increased in all treatments. Conclusively, despite important ameliorations in the mushroom nutritional value, mostly in C1t1, the product should be further tested in lower doses (< 3 g kg−1) to counteract its effect on heavy metal bioaccumulation.

Research Regarding Content in Amino-acids and Biological Value of Proteins from Polyodon spathula Sturgeon Meat

2017 ◽  
Vol 68 (5) ◽  
pp. 1063-1069
Author(s):  
Cristina Simeanu ◽  
Daniel Simeanu ◽  
Anca Popa ◽  
Alexandru Usturoi ◽  
Dan Bodescu ◽  
...  
Keyword(s):  
Amino Acids ◽  
Nutritive Value ◽  
Essential Amino Acids ◽  
Meat Production ◽  
Age Group ◽  
Chemical Methods ◽  
Biological Value ◽  
Polyodon Spathula ◽  
The One ◽  
Total Amino Acids

Polyodon spathula sturgeon breed is successfully reared in Romania in many fishery farms for meat production and it is capitalized on domestic market as consumption fish. In the current paper were studied a number of 1400 sturgeons from Polyodon spathula breed (1200 individuals of one summer - P.s.0+ and 200 individuals of fourth summers - P.s.3+). From this flock were weighted around 10%, for each age group, and for laboratory determinations were chosen 10 fishes for each age with the corporal mass close to the group mean. After analysing the fillets gathered from the studied fishes for establishing the chemical characteristics, nutritive and biological values of proteins were drawn some interesting conclusions. So, regarding chemical composition we notice that in the meat of analysed fishes water is in a rate of 75.41% at P.s.3+ and 78.37% for P.s.0+; proteins - between 18.08% for P.s.0+ and 19.89% for P.s.3+, values which place those fishes in the group of protein fishes; lipids - between 2.45% and 3.45%, values which situated those sturgeons in category of fishes with a low content in lipids; collagen � 3.83% at P.s.0+ and 4.14% at P.s.3+ which indicate low values for proteins of weak quality in the meat of those sturgeons. Study of nutritive value for the analysed fishes indicate the fact that fishes P.s.0+ have a mediocre nutritive value, having the ratio w/p of 4.33 while sturgeons P.s.3+ were placed in the 2nd category � fishes with a good nutritive value (rate w/p = 3.79). Energetic value of the studied fillets was 97.39 kcal/100 g for P.s.0+ and 114.31 kcal/100 g for P.s.3+, which enlightened an increase of nutritive value with aging, fact especially due to accumulation of adipose tissue. Study of proteins quality, through the presence of those 8 essential amino-acids in the meat of analysed fishes, show the fact that at sturgeons P.s.0+ proportion of essential amino-acids was 20.88% from total amino-acids, while at sturgeons P.s.3+ was 26.23%, fact which enlightened an increasing of proteins� biological value with fish aging. This fact was also shown by calculation of proteins� biological value through chemical methods (EAA index); calculated value for sturgeons P.s.0+ was a little bit lower (118.73) than the one calculated for sturgeons P.s.3+ (118.79).

Biological Value of Proteins in Relation to the Essential Amino Acids Which They Contain

1946 ◽  
Vol 32 (6) ◽  
pp. 597-612 ◽  
Author(s):  
Leslie E. Edwards ◽  
Robert R. Sealock ◽  
William W. O'Donnell ◽  
Grant R. Bartlett ◽  
Marion B. Barclay ◽  
...  
Keyword(s):  
Amino Acids ◽  
Essential Amino Acids ◽  
Biological Value

Nutrition of the bacon pig. XIX. The requirement of the bacon pig for certain essential amino acids

1958 ◽  
Vol 50 (2) ◽  
pp. 230-242 ◽  
Author(s):  
R. E. Evans
Keyword(s):  
Amino Acids ◽  
Amino Acid ◽  
Amino Acid Composition ◽  
Acid Composition ◽  
Energy Supply ◽  
Essential Amino Acids ◽  
Food Utilization ◽  
Biological Value ◽  
Potential Value ◽  
The Past

The addition of essential amino acids to all-vegetable diets, so as to raise the biological value of their proteins to the level of animal-protein concentrates, has often been advocated in the past by animal nutritionists. This aim was frustrated in practice since it was impossible, until recently, to secure the necessary supplies at prices that would make such additions economical. Feeding stuffs with added amino acids are now being sold commercially. This is possible following the manufacture of synthetic DL-methionine and crude L-lysine monochloride.It seemed desirable, therefore, to carry out investigations into the potential value of these amino acids to the pig feeder. This paper deals with the effect on growth, food utilization and retention of nitrogen of adding small amounts of lysine and methionine to the diet. An attempt is made to correlate the amino acid composition of the pig's diet with its rate of growth, the energy supply being adequate.

OBSERVATIONS ON THE BIOLOGICAL VALUE OF A MIXTURE OF ESSENTIAL AMINO ACIDS

Science ◽  
1943 ◽  
Vol 98 (2543) ◽  
pp. 286-288 ◽  
Author(s):  
A. A. ALBANESE ◽  
V. IRBY
Keyword(s):  
Amino Acids ◽  
Essential Amino Acids ◽  
Biological Value

scholarly journals Kanatlı Beslenmesinde Dut Yaprağının (Morus alba) Kullanılması

2016 ◽  
Vol 4 (6) ◽  
pp. 504
Author(s):  
Tugay Ayasan ◽  
Mikail Baylan
Keyword(s):  
Amino Acids ◽  
Nutritional Value ◽  
Fish Meal ◽  
Essential Amino Acids ◽  
Metabolic Energy ◽  
Good Source ◽  
Mulberry Leaf ◽  
Amino Acids Composition ◽  
Poultry Diets ◽  
The Tropics

The increasing costs of conventional feedstuffs like corn, soybean meal and fish meal for poultry diets is pushing the need to find less expensive alternatives. Mulberry grows well in the tropics and subtropics, and is reported to have excellent nutritional value. Mulberry leaves are very rich in protein (15-35%), minerals (2.42-4.71% Ca, 0.23-0.97% P), 1130-2240 kcal/kg metabolic energy (ME). The amino acids composition of mulberry leaf meal indicates it is a good source of essential amino acids especially lysine (1.80%) and leucine (2.58%). In this paper, studies made on the mulberry leaf used in nutrition of poultries have been reviewed.

scholarly journals Protein structure from the essential amino acids to the 3D structure

2019 ◽  
Vol 9 (1) ◽  
Keyword(s):  
Amino Acids ◽  
Protein Structure ◽  
Significant Contribution ◽  
Polypeptide Chain ◽  
Protein Structures ◽  
3D Structure ◽  
Building Blocks ◽  
Essential Amino Acids ◽  
Different Types ◽  
Quaternary Structures

Protein structure is a hot topic, not only to the specialist, but with others like the physicists. So this review is targeting those who are not biologists and have to deal with the protein in their research. In this review we travel with the protein structures from the amino acids and its classifications, and how the polypeptide chain is formed from these building blocks up to the final 3D structure. We introduced the secondary structure species like helices with its different types and how it is formed; also the beta sheet formation and types are explained briefly. Finally the tertiary and quaternary structures are presented. The approaches of molecular modeling as well as other important computational methods present significant contribution to studying proteins.

scholarly journals BY-PRODUCTS OF MILLING AND CORN PRODUCTION AS A SOURCE OF PROTEIN OF INCREASED BIOLOGICAL VALUE

2020 ◽  
pp. 105-111
Author(s):  
V. A. Scriabin ◽  
I. A. Saboiev ◽  
K. A. Tabanyukhov
Keyword(s):  
Amino Acids ◽  
Essential Amino Acids ◽  
Aleurone Layer ◽  
Corn Production ◽  
Biological Value ◽  
Feed Production ◽  
Food And Feed ◽  
Limiting Amino Acid ◽  
By Products

The main problem of modern grain crops is the low quality of proteins, due to the insufficient content of essential amino acids and, above all, lysine, a limiting amino acid, the amount of which depends on the digestibility of proteins by the human body. Amino acids in the grain are unevenly distributed. The germ and aleurone layer is richest in essential amino acids, primarily lysine. The biological value of protein fractions depends on the level of essential amino acids. Therefore, for example, the proteins of the aleurone layer have a higher biological value than in the rest of the endosperm. Thus, in terms of the amount of essential amino acids, oat protein, although only slightly, is still more biologically valuable than wheat, rye, and barley. Finely divided fractions of bran, which are rich in essential amino acids, can be used in food and feed production.

scholarly journals BIOLOGICAL VALUE OF PROTEINS OF MILK OF SIMMENTAL COWS PRODUCED UNDER CONDITIONS OF INTENSIVE TECHNOLOGY

2021 ◽  
Vol 247 (3) ◽  
pp. 288-292
Author(s):  
L.G. Khromova ◽  
◽  
N.V. Bailova ◽  
A.I. Sychev ◽  
◽  
...  
Keyword(s):  
Amino Acids ◽  
Amino Acid ◽  
Oscillation Amplitude ◽  
Essential Amino Acids ◽  
Acid Number ◽  
Protein Component ◽  
High Concentration ◽  
Biological Value ◽  
Amino Acid Index ◽  
Acid Index

Taking into account modern requirements, the biological value of the protein component of the Simmental breed Krov milk produced under intensive technology has been studied. The amino acid composition of milk proteins was identified by high-performance liquid chromatography. To analyze the biological value of proteins, calculated indicators were used: the amino acid index and the amino acid number (skor) of essential amino acids, taking into account the true digestibility of each of them. As a result of the research, all the essential and interchangeable amino acids and a fairly high concentration of many of them were identified. Among the essential amino acids, the largest amount in the milk samples contained phenylalanine+tyrosine, leucine, lysine, valine, and the smallest-tryptophan, methionine+cysteine. In the aggregate of interchangeable amino acids, the highest saturation was noted for glutamic acid+glutamine, arginine, proline, and the lowest-glycine, alanine. The predominance of interchangeable amino acids was noted in the protein component, which caused a low amino acid index (0.61). The amount of assimilated essential amino acids was higher relative to the reference protein. However, the amino acid score had a wide oscillation amplitude: from 149.6 % for the amino acids phenylalanine + tyrosine to 61.2 and 87.8 %, respectively, for tryptophan and methionine+cysteine, which indicated their imbalance. The essential amino acids tryptophan and methionine+cysteine were limiting, since their amino acid number (skor) is below 100 %.

scholarly journals THE IMPACT OF PRODUCTION TREATMENTS OF FEED CONCENTRATE PRODUCED FROM WASTE OF CEREAL PRODUCTION ON ITS BIOLOGICAL VALUE AND EFFICIENCY IN THE COMPOSITION OF COMPOUND FEED FOR CARP

2021 ◽  
Vol 21 (2) ◽  
Author(s):  
J. Koshak ◽  
N. Zenovich ◽  
E. Rybkina
Keyword(s):  
Amino Acids ◽  
Wheat Bran ◽  
Total Content ◽  
Essential Amino Acids ◽  
Glucose Content ◽  
Biological Value ◽  
Heat Moisture Treatment ◽  
Cereal Production ◽  
Moisture Treatment ◽  
Extruded Feed

The following article presents a new raw component in compound feed for carp – feed concentrate produced from cereal production waste. The feed concentrate is based on several types of cereal fodder meal - wheat, pea, barley, as well as wheat bran and unshelled oat grain. The feed concentrate is balanced according to the needs of carp and can be used as feed for carp instead of wheat grain or as a part of compound feed for carp. Heat-moisture processing of compound feed before extrusion is one of the main stages that further ensure the stability of technological processes and the final quality of the feed concentrate. The amino acid composition was determined at various temperatures of the feed concentrate after heat-moisture treatment of + 40, 60, 70 and 80º С at a constant moisture content of the concentrate of +282° С. Amino acid score has been calculated for feed concentrates that have been exposed to various heat treatments. The amino score was calculated in relation to the carp's need for essential amino acids. It was found that an increase in the temperature of the concentrate during heat-moisture treatment leads to a decrease in the content of essential amino acids. For example, the total content of methionine and cysteine in the composition of the feed concentrate at a temperature of +75° C was 0.46%, with the minimum allowable total content of these amino acids in the composition of feed 0,5%. Heat-moisture treatment at a product temperature above +75° C leads to a decrease in the content of essential amino acids and the biological value of the feed concentrate.The process of extrusion of feed concentrate from waste of cereal production has been studied. The glucose content in the feed concentrate was studied at various extrusion modes. The glucose content indicates the degree of modification of the starch during the extrusion process, and the more glucose the product contains, the better it is absorbed by the carp. When extruded with an increase in temperature, the starch passes into a viscous-flowing (gelatinized) state, forming a so-called melt, the cooling of which also leads to the formation of a three-dimensional gel network. The feed concentrate granule becomes monolithic in structure; it becomes quite hard and can harm the intestines of carp. Therefore, it contains wheat bran in an amount of 1%, as a component that is able to weaken the feed concentrate granule. The degree of starch destruction in the composition of the extruded feed concentrate with the addition of wheat bran reached its maximum and the granule became porous, its hardness decreased. It was detected that when the temperature of the feed concentrate after extrusion rises above +100°C, the biological value of the feed concentrate decreases, and it becomes unbalanced in the content of such essential amino acids as lysine, threonine, methionine and cysteine. Therefore, the optimum product temperature after extrusion is +90-100˚C.The effectiveness of extruded feed concentrate was determined in the composition of granulated feed for two- and threeyear-old carp. The feed ratio of the compound feed containing the feed concentrate was 0.9 units, which is 64% lower than of the control compound feed, which includes a non-extruded grain group that is not balanced in terms of carp needs.

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