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 ◽  
...  
2017 ◽  
Vol 68 (5) ◽  
pp. 1063-1069
Author(s):  
Cristina Simeanu ◽  
Daniel Simeanu ◽  
Anca Popa ◽  
Alexandru Usturoi ◽  
Dan Bodescu ◽  
...  

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).


1958 ◽  
Vol 50 (2) ◽  
pp. 230-242 ◽  
Author(s):  
R. E. Evans

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.


Science ◽  
1943 ◽  
Vol 98 (2543) ◽  
pp. 286-288 ◽  
Author(s):  
A. A. ALBANESE ◽  
V. IRBY

Author(s):  
V. A. Scriabin ◽  
I. A. Saboiev ◽  
K. A. Tabanyukhov

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.


Author(s):  
L.G. Khromova ◽  
◽  
N.V. Bailova ◽  
A.I. Sychev ◽  
◽  
...  

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 %.


2021 ◽  
Vol 21 (2) ◽  
Author(s):  
J. Koshak ◽  
N. Zenovich ◽  
E. Rybkina

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.


1946 ◽  
Vol 31 (6) ◽  
pp. 715-736 ◽  
Author(s):  
John R. Murlin ◽  
Leslie E. Edwards ◽  
Seraphine Fried ◽  
Thaddeus A. Szymanski ◽  
Elizabeth Nasset ◽  
...  

Author(s):  
Д.Ю. БОЛГОВА ◽  
Н.А. ТАРАСЕНКО ◽  
И.А. ЧУМАК

Одним из многочисленных способов обогащения мучных кондитерских изделий является введение в их рецептуру натуральных ингредиентов растительного происхождения. Особый интерес для кондитерской отрасли представляет зерно гороха, богатое белком. Исследован химический состав продуктов переработки зерна гороха – концентрата горохового белка и крахмальной фракции зерна гороха. Оценена возможность их использования для обогащения мучных кондитерских изделий. Установлено, что концентрат горохового белка содержит 53–55% протеина, незаменимые аминокислоты, поэтому обладает высокой биологической ценностью. Перевариваемость аминокислот горохового белка составляет 94%. Крахмальная фракция зерна гороха содержит 62–70% крахмала. Продукты переработки зерна гороха имеют низкий гликемический индекс. Использование продуктов переработки зерна гороха позволит повысить пищевую и биологическую ценность мучных кондитерских изделий за счет увеличения содержания белка, незаменимых аминокислот, минеральных веществ и резистентного к перевариванию крахмала. One of the many ways to enrich flour confectionery products is the introduction of natural ingredients of plant origin into their formulation. Of particular interest for the pastry industry is pea grain, rich in protein. The chemical composition of pea grain processing products – pea protein concentrate and the starch fraction of pea grain has been studied. The possibility of their use for enriching flour pastry products is estimated. It was found that the pea protein concentrate contains 53–55% protein, essential amino acids, so it has a high biological value. The digestibility of amino acids of pea protein is 94%. The starch fraction of pea grain contains 62–70% starch. Pea grain processing products have a low glycemic index. The use of peagrain processing products will increase the nutritional and biological value of flour pastry products by increasing the content of protein, essential amino acids, minerals and starch resistant to digestion.


Author(s):  
O. Fursik ◽  
I. Strashynskyi ◽  
V. Pasichnyi ◽  
R Svyatnenko

Food proteins, besides being used as sources of energy and providing the body with amino acids for the protein synthesis, are important biological objects that help maintain the overall health of a person, participate in the growth and development of the organism, and the functioning of cellular metabolism. Due to the ability of maintaining a balance between anabolic and catabolic metabolism, industrial proteins have achieved the status of a biologically active ingredient or substance that promotes health, which is associated with the placement of peptides or amino acids in the chain encoded in each protein. The article presents the data of conducted researches on the influence of created functional composition containing protein (FCP) of the given composition and properties on SCORE and indicators of  biological efficiency  of cooked sausages proteins. Biological value, as a criterion for evaluating the protein, is very important for determining the effectiveness of its use by the organism. The product's amino acid composition is one of the indicators of its biological value. As a result of the obtained data analysis on the study of the experimental cooked sausage's amino acid composition, it was found that the experimental samples using the FCP were balanced by the content of essential amino acids in comparison with the control sample. For a experimental sample number 1 using FCP in combination with red poultry compared to the control sample, the number of all essential amino acids is increased by an average of 67.2%. For the experimental sample number 2 using FCP combined with mechanical deboned poultry meat (MDPM), there is a decrease in the number of amino acids such as lysine, valine, sulfur-containing (compared to the experimental sample number 1), the SCORE for which is less than 100%. Calculating the indicator of biological value and comparative redundancy, and the coefficients of differentiation the amino acid composition (CDAAC) and utility, generalized the effect of FCP on the biological efficiency of the product's protein. The use of FCP in the cooked sausages technology in the amount of 30% increases the biological value of experimental samples by an average of 3%, utilitarian utilization rate – by 8.4%, and reduces the comparative redundancy by an average of 50%, CDAAC – by 4% compared to the control sample. Replacement of the meat raw material developed by the FCP in the recipes of cooked sausages increases and balances the amino acid composition of the experimental samples.


Author(s):  
Л.Г. ЕЛИСЕЕВА ◽  
Е.В. ЖИРКОВА ◽  
Д.С. КОКОРИНА

Исследовано влияние муки киноа торговых марок (ТМ) «Ярмарка» (Россия), «Мистраль» (Россия) и «Bohlsener & Muehle» (Германия), представленных на российском рынке, на химический состав, показатели качества и биологическую ценность формового хлеба из пшеничной муки. Муку киноа указанных ТМ вносили при замесе теста в количестве 10 и 20% взамен пшеничной муки. При внесении муки киноа происходило незначительное уменьшение объемного выхода хлеба: с 485 см3 в контрольном образце до 420 см3 в опытных. Образцы хлеба с внесением 20% муки киноа разных ТМ имели приятный легкий ореховый аромат. Установлено, что внесение 10–20% муки киноа не оказало отрицательного влияния на качество хлебобулочных изделий. Однако в образце хлеба с добавкой муки киноа содержалось белков на 2,1, пищевых волокон на 1,4 и жира на 0,3 г/100 г больше по сравнению с контрольным образцом – хлебом из пшеничной муки без добавок. Образец хлеба с добавкой 20% муки киноа ТМ «Ярмарка» превосходил образец хлеба из пшеничной муки без добавок по общему количеству аминокислот на 55%, в том числе по содержанию заменимых аминокислот – на 71,5%, незаменимых – почти на 20%, а содержание жира в хлебе повысилось с 0,9 до 3,2%. Доказано, что хлеб с добавкой муки киноа в количестве 20% взамен хлебопекарной пшеничной муки по своим органолептическим показателям качества не уступает хлебу, приготовленному по традиционной рецептуре, а по пищевой и биологической ценности превосходит его. The influence of flour quinoa brands «Yarmarka» (Russia), «Mistral» (Russia) and «Bohlsener & Muehle» (Germany), presented on the Russian market, on chemical composition, the quality indicators and biological value of bread from wheat flour studied. The quinoa flour of these brands was introduced when mixing the dough at 10 and 20% instead of wheat flour. With the introduction of quinoa flour, a slight decrease in the volume of bread occurred: from 485 cm3in the control sample to 420 cm3in the experimental. Samples of bread with the introduction of 20% flour quinoa different brands had a pleasant light nutty flavor. It is established that the introduction of 10–20% quinoa flour did not have a negative impact on the quality of bakery products. However, the sample of bread with the addition of quinoa flour contained of proteins on 2,1, of dietary fiber on 1,4 and fat on 0,3 g/100 g more than the control sample – bread from wheat flour without additives. The sample of bread with the addition of 20% of quinoa flour of the brand «Yarmarka» was superior to the sample of bread from wheat flour with no additives in the total number of amino acids on 55%, including the content of essential amino acids – on 71,5%, essential – almost by 20% and the fat content of bread increased from 0,9 to 3,2%. It is proved that bread with the addition of quinoa flour in the amount of 20% instead of baking wheat flour in its organoleptic quality indicators is not inferior to bread prepared according to the traditional recipe, and in food and biological value exceeds it.


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