ANALYTICAL CONTROL OF THE TOTAL VOLATILE BASES NITROGEN IN FISH PRODUCTS

Fisheries ◽  
2021 ◽  
Vol 2021 (4) ◽  
pp. 89-97
Author(s):  
Liubov Abramova ◽  
Andrey Kozin ◽  
Elena Guseva ◽  
Ilya Derunets ◽  
Margarita Kochneva
Keyword(s):  
Total Nitrogen ◽  
Raw Materials ◽  
Protein A ◽  
Statistical Criterion ◽  
Analytical Control ◽  
Acid Extract ◽  
Initial State ◽  
Permissible Levels ◽  
The Moment ◽  
Direct Distillation

Comparative studies of the content of total nitrogen of volatile bases (ALO) in fish raw materials, as an objective indicator of quality, were carried out by direct distillation of the sample and by distillation of acid extract. It was found that the method based on direct distillation of the sample results in 25-30% higher values than the method of acid extract distillation due to alkaline hydrolysis of the sample protein. A comparison of the reproducibility of the two methods using the Fisher statistical criterion showed the heterogeneity of the variances and the impossibility of attributing them to a single general population. For the gradation of the quality of fish raw materials, the method of distilling acid extract is recommended. The objects of three different categories are studied, grouped according to the proposed three degrees of quality, based on the maximum permissible levels of nitrogen content of volatile bases. The reliability of the results is shown and a conclusion is made about the use of the ALO content as an indicator characterizing both the initial state of fish raw materials and the dynamics of the storage process and the establishment of the moment of spoilage. A method for measuring the mass fraction of total nitrogen of volatile bases has been developed and certified (certificate of certification No. 0168/ROSS RU.0001.310430/2020).

scholarly journals Optimization of food compositions according to the ideal protein profile

Food systems ◽  
2021 ◽  
Vol 4 (1) ◽  
pp. 4-11
Author(s):  
S. V. Zverev ◽  
V. I. Karpov ◽  
M. A. Nikitina
Keyword(s):  
Amino Acids ◽  
Amino Acid ◽  
Essential Amino Acid ◽  
Raw Materials ◽  
Protein Profile ◽  
Protein A ◽  
Sum Of Squares ◽  
Reference Protein ◽  
Ideal Protein ◽  
Amino Acid Score

The paper emphasizes the importance of not only the quantitative but also qualitative composition of protein in nutrition. The authors propose protein classification into three main groups according to the concept of reference (ideal) protein. A mathematical model is examined to solve the task of rational mixture production upon the given profile of reference protein. Two variants of the criterion for formation of optimal composition are described. One of them presents the classical sum of squares of the residual for essential amino acid scores and 1. The second also presents the sum of squares of the residual for essential amino acid scores and 1 but with regard to only those amino acids, which scores are less than 1. The minima of these criteria at the set of variants for the content of ingredients are taken as targeted functions. The algorithm and the program of calculation were realized in the program environment Builder C++ 6.0. The macro flowchart of the algorithm is presented and detailed description of each block is given. The program interface before and after the start of the calculation module is shown. The main windows and interpretation of the presented data are described. An example of realization of the proposed mathematical apparatus when calculating a food model composition is given. Plant components (white kidney beans, flax, peanut, grit “Poltavskaya», dry red carrot) were used as an object of the research. Most plant proteins were incomplete. It is possible to regulate the chemical composition including correction of a protein profile by combination of plant raw materials. Analysis of alternative variants demonstrated that minimum essential amino acid score in the first composition was 0.79 (by the first criterion), in the second 1.0 (by the second criterion); the reference protein proportion in the mixture was 10.8 and 13.5, respectively, according to the first and second criterion. The comparative results by other quality indicators for protein in the mixture are also presented: the coefficient of amino acid score difference (CAASD), biological value (BV), coefficient of utility, essential amino acids index (IEAA).

DNA synthesis during the first stages of anterior regeneration in the polychaete annelid Owenia fusiformis (dedifferentiation and early phases of differentiation )

Development ◽  
1978 ◽  
Vol 44 (1) ◽  
pp. 81-92
Author(s):  
Monique Marilley ◽  
Yves Thouveny
Keyword(s):  
Dna Synthesis ◽  
Initial State ◽  
Cell Cycles ◽  
Small Areas ◽  
New Instrument ◽  
Dividing Cells ◽  
Marine Polychaete ◽  
The Moment ◽  
Early Phases ◽  
Anterior Regeneration

We have analysed DNA synthesis in early phases of regeneration in a marine Polychaete Annelid, Owenia fusiformis. The length and efficiency of the prereplicative phase was found to vary with the diurnal rhythm of activity of the animal; that is, it depends on the initial state of the cell population at the moment of the onset of proliferative stimulation. When animals were operated on at 12 a.m., the duration of the prereplicative phase of the first cells stimulated to proliferate was found to be 12 h. The remaining cells entered the S-phase progressively in waves until the 3rd day following amputation when nearly 100% of the blastema cells were stimulated. At that time the cell-cycles of these dividing cells were found to be highly synchronized. Blastema differentiation takes place on the 4th day and is initiated by stomodeum formation. During the differentiation phase, DNA synthesis is restricted to small areas of the regenerating part. The system described is viewed as a new instrument for investigating the control of the cell cycle in synchronized and subsequently differentiating tissue cells.

The problem of variation

2021 ◽  
pp. 111-134
Author(s):  
Arlin Stoltzfus
Keyword(s):  
Quantitative Genetics ◽  
Raw Materials ◽  
Substantive Theory ◽  
Theory Of Evolution ◽  
Multivariate Generalization ◽  
Theory Of Variation ◽  
Broad Framework ◽  
The Moment ◽  
Evo Devo

Chapter 7 maps out a broad framework for considering the problem of variation in evolution. Under the neo-Darwinian view that variation merely plays the role of supplying random infinitesimal raw materials, with no dispositional influence on the course of evolution, a substantive theory of form and its variation is not required to specify a complete theory of evolution. This view has been breaking down from the moment it was proposed, and is now seriously challenged by results from evo-devo, comparative genomics, molecular evolution, and quantitative genetics. For instance, the multivariate generalization of quantitative genetics indicates that selection cannot possibly act as an independent governing force. Replacing a theory of variation as fuel with a theory of variation as a dispositional factor will require, at minimum, an understanding of tendencies of variation (source laws), and an understanding of how those tendencies affect evolution (consequence laws).

scholarly journals A Review of Cottonseed Protein Chemistry and Non-Food Applications

2020 ◽  
Vol 1 (3) ◽  
pp. 256-274
Author(s):  
H. N. Cheng ◽  
Zhongqi He ◽  
Catrina Ford ◽  
Wade Wyckoff ◽  
Qinglin Wu
Keyword(s):  
Soy Protein ◽  
Raw Materials ◽  
Protein A ◽  
Raw Material ◽  
Protein Chemistry ◽  
Cottonseed Protein ◽  
Fiber Production ◽  
The Past ◽  
Sustainable Products ◽  
Food Applications

There has been increasing interest in recent years in the use of agro-based raw materials for the production of bio-friendly and sustainable products. Plant-based proteins are among the popular materials being studied. In particular, cottonseed protein (a byproduct of cotton fiber production) is widely available and has useful properties. Although not as well-known as soy protein, cottonseed protein has been shown to be a potentially valuable raw material for numerous applications. In this review, the latest developments in isolation, composition and molecular weight, chemical and enzymatic modifications, and non-food applications are delineated. Among these applications, films and coatings, interfacial and emulsifying applications, adhesives, and bioplastics seem to attract the most attention. A particular effort has been made to cover the literature on these topics in the past 10 years.

104 The Danish Perspective to Remove Medicinal Zinc and Reducing the Use of Antibiotics in Swine Production

2021 ◽  
Vol 99 (Supplement_1) ◽  
pp. 103-104
Author(s):  
Hanne Maribo
Keyword(s):  
Amino Acids ◽  
Amino Acid ◽  
Protein Level ◽  
Diet Composition ◽  
Raw Materials ◽  
Productivity Loss ◽  
Protein A ◽  
Swine Production ◽  
Trial Testing ◽  
Ideal Protein

Abstract Diarrhoea in weaners has been commonly controlled by adding medicinal zinc (2500 ppm), but by June 2022 this was no longer allowed. In Denmark, antibiotics are accepted for therapeutic use only and usage is registered on pen level and is monitored by Danish authorities. This increases the risk of post-weaning diarrhoea. SEGES has tested several tools, additives e.g. organic acids, diet composition, raw materials e.g. blood plasma. Lowering the protein level in the diet post-weaning is very efficient, but adversely affects productivity. The latest results show on average that a reduction in protein from 19% to 15% in the weaner diet (6-9kg) results in a 60% reduction in diarrhoea; however, it also leads to a productivity loss of 1-1,5 euro. Reducing the protein level from 19% to 16,5% reduces the frequency of diarrhoea by 30% and the productivity loss by approx. 0,3 euro. A trial testing the possibility for compensation for this loss in the weaner period by adding extra protein and amino acids in the finisher diet (30–115 kg) is running now and preliminary results will be presented. Further results from trials reducing diarrhoea by reducing protein, a new way to calculate ideal protein and amino acid balances as well as results from concept tests with weaners will be presented. Further new results evaluating ideal protein and amino acid balances will be presented.

Analytical control of secondary metal-bearing raw materials

2015 ◽  
pp. 36-41 ◽  
Author(s):  
Yu. A. Karpov ◽  
◽  
V. B. Baranovskaya ◽  
V. N. Belyaev ◽  
S. I. Loleyt ◽  
...  
Keyword(s):  
Raw Materials ◽  
Analytical Control

THE ELEMENTAL COMPOSITION STUDY OF PLANTS IN THE SIBERIAN FLORA (ALFREDIA CERNUA AND FILI-PENDULA ULMARIA), EXTRACTS AND FRACTIONS TO CREATE DRUGS BASED ON THEM

2019 ◽  
pp. 205-216
Author(s):  
Vladimir Il'ich Otmahov ◽  
Inessa Vladimirovna Shilova ◽  
Elena Vasil'yevna Petrova ◽  
Anastasiya Alekseyevna Loginova ◽  
Evgeniya Sergeyevna Rabtsevich ◽  
...  
Keyword(s):  
Elemental Composition ◽  
Raw Materials ◽  
Absorption Spectrometry ◽  
Atomic Emission ◽  
Biologically Active Substances ◽  
Biologically Active ◽  
Herbal Remedies ◽  
Emission Spectrometry ◽  
Analytical Control ◽  
Active Substances

Using the methods of arc atomic emission spectrometry (AAES), atomic emission flame photometry (AEFP), atomic absorption spectrometry (AAS) and mass spectrometry (ICP-MS), the elemental composition of the aerial part of widely used in medical practice Alfredia cernua and Filipendula ulmaria, extracts and fractions obtained from them, is investigated. It was shown that not only biologically active substances, but also mineral elements are extracted by extractants, which may be due both to the formation of complexes with biologically active substances and affinity for extractants. Therefore, the elemental composition must be considered as an important component of plant extracts and medicinal products obtained from them. Simultaneously with biologically active substances in ethanol extracts there is an accumulation of not only biogenic, but also toxic elements, which degree of extraction is often higher. It increases even more during the transition from periodic to countercurrent extraction, which allows to obtain extracts with the highest yield of biologically active substances. Since the enriched extract is directly used to obtain the dosage form, a preliminary elemental analysis is necessary. Analytical control of the content of TM is also necessary when choosing the place of growth of plants raw materials, which are used to create medicinal herbal remedies.

scholarly journals Stress states and moment rates of a two-asperity fault in the presence of viscoelastic relaxation

2015 ◽  
Vol 2 (1) ◽  
pp. 297-327
Author(s):  
M. Dragoni ◽  
E. Lorenzano
Keyword(s):  
Discrete Dynamical System ◽  
Constant Strain Rate ◽  
The State ◽  
Viscoelastic Deformation ◽  
Initial State ◽  
Tectonic Plates ◽  
Stress States ◽  
The Moment ◽  
Postseismic Relaxation ◽  
The Relationship

Abstract. A fault containing two asperities with different strengths is considered. The fault is embedded in a viscoelastic shear zone, subject to a constant strain rate by the motions of adjacent tectonic plates. The fault is modelled as a discrete dynamical system where the average values of stress, friction and slip on each asperity are considered. The state of the fault is described by three variables: the slip deficits of the asperities and the viscoelastic deformation. The system has four dynamic modes, for which the analytical solutions are calculated. The relationship between the state of the fault before a seismic event and the sequence of slipping modes in the event is enlightened. Since the moment rate depends on the number and sequence of slipping modes, the knowledge of the source function of an earthquake constrains the orbit of the system in the phase space. If the source functions of a larger number of consecutive earthquakes were known, the orbit could be constrained more and more and its evolution could be predicted with a smaller uncertainty. The model is applied to the 1964 Alaska earthquake, which was the effect of the failure of two asperities and for which a remarkable postseismic relaxation has been observed in the subsequent decades. The evolution of the system after the 1964 event depends on the state from which the event was originated, that is constrained by the observed moment rate. The possible durations of the interseismic interval and the possible moment rates of the next earthquake are calculated as functions of the initial state.

Sign in / Sign up

Export Citation Format

Share Document