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Biochemical Factors Affecting the Quality of Products and the Technology of Processing Deep-Sea Fish, the Giant Grenadier Albatrossia pectoralis

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Journal of Ocean University of China 2020年第3期19卷 681-690页

作者： PIvnEnKO T.n. KARPEnKO Yu.v. KRASHCHEnKO v.v. POZDnYAKOvA Yu.M. ESIPEnKO R.v. Far Eastern State Technical Fisheries University Vladivostok 690087Russia

The composition of muscle tissues of a deep-sea species, the giant grenadier(Albatrossia pectoralis), and a mesopelagic species, the Alaska pollock(Theragra chalcogramma), are compared. Grenadier is proved to have a higher moisture content(91.7%) and lower protein(7.4%) and lipid(0.3%) contents. The factors responsible for the softening and moisture separation during processing of grenadier are identified. Contents of some fractions of non-protein nitrogenous components, including trimethylamine oxide(TMAO) and free amino acids, are clarified. The proportion of the main myofibrillar proteins myosin and actin, which is considered as an indicator of efficiency of structure formation in fish muscle tissue during processing, is almost 20% lower in giant grenadier than in pollock. The effects of endogenous protease, Са^2+-ATPase and transglutaminase on the processes of autolysis, denaturation, and possibility of myofibrillar proteins cross-linking were also studied. The proposed technology of getting a nutritionally balanced, gel-like, ready-to-use foodstuff from grenadier fillet includes its enrichment with pollock muscle tissue and supplementing with a binary structure-forming agent containing collagen and chitosan. nutritional value of the products is assessed by the method of biological assay and by determining the denaturation changes of myofibrillar proteins. The modes of fine mincing and thermal processing, as well as the shelf-life of the finished product are justified. The developed technology of producing a ready-to-eat food from giant grenadier will allow a more efficient use of this underutilized resource.

关键词： giant grenadier Alaska pollock myosin actin proteases ATPase transglutaminase softening structure formation ready-to-eat foodstuffs

On Charged Black Hole in Multidimensional Theory with Ricci-Flat Internal Spaces

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Chinese Physics Letters 1991年第9期8卷 439-441页

作者： S.B.Fadeev v.D.Ivashchuk v.n.Melnikov USSR State Committee for Standards 9 Leninski Prospect117049MoscowUSSR

A generalization of the Reissner-nordstrom solution for the case of n internal Ricci-flat spaces is obtained.

关键词： Ricci generalization Reissner

Temperature and strain registration by fibre-optic strain sensor in the polymer composite materials manufacturing

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International Journal of Smart and nano Materials 2018年第2期9卷 99-110,I0003页

作者： v.P.Matveenko n.A.Kosheleva I.n.Shardakov A.A.voronkov Department of complex problems of deformable solids mechanics Institute of Continuous Media Mechanics of the Ural Branch of RAS(ICMM UB RAS)PermRussian Federation Scientific&Educational Center for Aviation Composite Technologies Perm National Research Polytechnic University(PNRPU)PermRussian Federation

The presence of process-induced strains induced by various manufacturing and operational factors is one of the characteristics of polymer composite materials(PCM).Conventional methods of registration and evaluation of process-induced strains can be laborious,time-consuming and demanding in terms of technical *** employment of embedded fibre-optic strain sensors(FOSS)offers a real prospect of measuring residual *** paper demonstrates the potential for using embedded FOSS for recording technological strains in a PCM *** PCM plate is manufactured from prepreg,using the direct compression-moulding *** this method,the prepared reinforcing package is placed inside a mould,heated,and then exposed to compaction *** examined technology can be used for positioning FOSS between the layers of the composite ***-optic sensors,interacting with the material of the examined object,make it possible to register the evolution of the strain process during all stages of polymer-composite *** data were recorded with interrogator ASTRO X *** obtained data were processed using specially developed algorithms.

关键词： Polymer composite materials fibre-optic strain sensors process-induced strains smart-materials

Ion heat transport in electron cyclotron resonance heated L-mode plasma on the T-10 tokamak

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Plasma Science and Technology 2024年第4期26卷 52-60页

作者： v.A.KRUPIn M.R.nURGALIEv A.R.nEMETS I.A.ZEMTSOv S.D.SUnTSOv T.B.MYALTOn D.S.SERGEEv n.A.SOLOvEv D.v.SARYCHEv D.v.RYJAKOv S.n.TUGARInOv n.n.nAUMEnKO national Research Centre“Kurchatov Institute” Moscow 123182Russia Bauman Moscow State Technical University Moscow 105005Russia Institution“Project Center ITER” Moscow 123098Russia JSC“SOLAR” Minsk 220034Belarus

Anomalous ion heat transport is analyzed in the T-10 tokamak plasma heated with electron cyclotron resonance heating(ECRH) in second-harmonic extra-ordinary mode. Predictive modeling with empirical scaling for Ohmical heat conductivity shows that in ECRH plasmas the calculated ion temperature could be overestimated, so an increase of anomalous ion heat transport is required. To study this effect two scans are presented: over the EC resonance position and over the ECRH power. The EC resonance position varies from the high-field side to the low-field side by variation of the toroidal magnetic field. The scan over the heating power is presented with on-axis and mixed ECRH regimes. Discharges with high anomalous ion heat transport are obtained in all considered regimes. In these discharges the power balance ion heat conductivity exceeds the neoclassical level by up to 10 times. The high ion heat transport regimes are distinguished by three parameters: the ratio Te/Ti, the normalized electron density gradient R/■, and the ion–ion collisionality νii~*. The combination of high Te/Ti, high νii~*, and R/■=6-10 results in values of normalized anomalous ion heat fluxes up to 10 times higher than in the low transport scenario.

关键词： tokamak L-mode electron cyclotron resonance heating ion heat transport

nanomotion of bacteria to determine metabolic profile

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nanotechnology and Precision Engineering 2024年第1期7卷 1-9页

作者： S.n.Pleskova E.v.Lazarenko n.A.Bezrukov R.n.Kriukov A.v.Boryakov M.E.Dokukin S.I.Surodin Research Laboratory of Scanning Probe Microscopy Lobachevsky State University of Nizhny NovgorodNizhny Novgorod 603950Russia Department of nanotechnology and Biotechnology Nizhny Novgorod State Technical University n.a.R.E.AlekseevNizhny Novgorod 603950Russia Sarov Physics and Technology Institute National Research Nuclear University MEPhISarov 607186Russia

In addition to their visible motion such as swimming(e.g.,with the help ofﬂagella),bacteria can also exhibit nanomotion that is detectable only with highly sensitive instruments,and this study shows that it is possible to detect bacterial nanomotion using an AFM detection *** results show that the nanomotion characteristics depend on the bacterial strain,and that nanomotion can be used to sense the metabolic activity of bacteria because the oscillations are sensitive to the food preferences of the bacteria and the type of surrounding medium.

关键词： nanomotion Bacteria Cantilever Oscillation Atomic force microscopy Metabolism

Bioactive peptides: A review

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Food Quality and Safety 2017年第1期1卷 29-46页

作者： Adrián Sánchez Alfredo vázquez Laboratorio de Investigación en Inmunoquímica Dr.Márquez 162CuauhtémocDoctores06720CDMX Departamento de Química Orgánica Facultad de QuímicaUniversidad Nacional Autónoma de MéxicoMéxico

Bioactive peptides(BP)are organic substances formed by amino acids joined by covalent bonds known as amide or peptide *** some BP exist free in its natural source,the vast majority of known BP are encrypted in the structure of the parent proteins and are released mainly by enzymatic *** BP have been prepared by chemical *** play a significant role in human health by affecting the digestive,endocrine,cardiovascular,immune,and nervous *** are considered the new generation of biologically active regulators;they can prevent oxidation and microbial degradation in foods and also improve the treatment of various diseases and disorders,thus increasing the quality of *** growing interest in BP has incentivized the scientific community and the food industry to exploring the development of new food additives and functional products based on these *** present review highlights the recent findings on the identification,bioassays,and use of BP,as well as their potential use as food additives and in the development of functional products.

关键词： peptides bioactivity marine origin nutraceutical hydrolysis fermentation

Dynamic analysis of polymeric fluid in shear flow for dumbbell model with internal viscosity

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Journal of Central South University 2008年第S1期15卷 17-20页

作者：杨晓东 R.v.n.MELnIK Department of Engineering Mechanics Shenyang Institute of Aeronautical Engineering Mathematical Modelling and Computational Sciences Wilfrid Laurier University

The dynamic analysis of semi-flexible polymers,such as DnA molecules,is an important multiscale problem with a wide range of applications in science and *** this contribution,a dumbbell model with internal viscosity was studied in steady shear flows of polymeric *** tensors with moments other than second moment were approximated in the terms of second moment ***,the nonlinear algebraic equation of the second moment conformation tensor was calculated in closed ***,substituting the resulting conformation tensor into the Kramers equation of Hookean spring force,the constitutive equations were *** shear material properties were discussed for different internal viscosities and compared with the results of Brownian dynamics simulation.

关键词： dynamic simulation polymeric fluid internal viscosity shear thinning

Screening large numbers of recombinant plasmids:modifications and additions to alkaline lysis for greater efficiency

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Progress in natural Science:Materials International 2006年第11期16卷 1231-1232页

作者： n.v.CHAnDRASEKHARAn Daniel L.SIMMOnS Department of Chemistry and Biochemistry Brigham Young UniversityProvoUtah 84602USA

Selecting bacteria transformed with recombinant plasmid is a laborious step in gene cloning experiments. This selection process is even more tedious when large numbers of clones need to be screened. We describe here modifications to the ultra fast plasmid preparation method described previously by Law and Crickmore. The modified method is coupled to an efficient PCR step to rapidly determine orientation of the inserts. Compared to traditional methods of analysis requiring growth of overnight cultures, plasmid isolation and restriction enzyme digestion to determine orientation this procedure allows for the analysis and storage of a large number of recombinants within a few hours.

关键词： plasmid preparation polymerized chain reaction

EFFECT OF InTERnAL vISCOSITY OF POLYMERIC FLUIDS UnDER STROnG EXTEnSIOnAL FLOWS

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Chinese Journal of Polymer Science 2009年第2期27卷 189-193页

作者：杨晓东 Roderick v.n.Melnik Department of Engineering Mechanics Shenyang Institute of Aeronautical Engineering Mathematical Modelling & Computational Sciences Wilfrid Laurier UniversityWaterlooOntarioCanada N2L 3C5

The dumbbell model with internal viscosity for a dilute polymer solution is investigated based on a balance of viscous drag and restoring Brownian *** approximate method is used to obtain the solution of extensional stress in closed form in the case of steady *** different internal viscosities,this parametric study shows different asymptotic regimes of the extensional viscosity as a function of strain *** analysis may explain the attenuation of pressure drop in strong flows from a phenomeno...

关键词： Polymeric fluid Internal viscosity Extensional viscosity.