Investigation of the Expedience of Modification of the Carbohydrate Composition of Rice Flour in the Technology of Gluten-free Bread

The research considers a possibility of using modification of the carbohydrate composition of rice flour in the technology of bread of the special destination for celiachia.There has been conducted an analysis of the condition of the carbohydrate-amylase complex of rice flour. Revealed regularities have demonstrated that this flour has an unessential amylolytic activity that negatively influences the course of microbiological processes in gluten-free dough and quality parameters of ready products.The aim of the research was to develop arrangements as to accumulation of sugars in dough at the expanse of own reserves of rice bread for providing the necessary intensity of rice dough fermentation by using enzymes of the amylolytic effect. It is a precondition for improving structural-mechanical and organoleptic properties of gluten-free rice bread. At the same time accumulation of products of incomplete hydrolysis of flour starch in the process of its fermentative modification – dextrins will favor deceleration of ready products staling.There has been established the influence of α-amylase of the fungal origin and glucoamylase on accumulation of sugars at hydrolysis of rice flour starch. It has been studied, that dosage of α-amylase in amount 0,005 % and glucoamylase – 0,03 % of a flour mass results in creating sugars in amount 5,5–6 %. There has been proved the effectiveness of using α-amylase by accumulation of dextrins, in which composition the essential raise of the content of low-molecular ones – archo- and maltodextrins has been determined.Based on the conducted studies, it has been determined, that hydrolysis products of rice flour starch are created as a result of its fermentative modification by α-amylase and glycoamylase that is testified by the increase of gas-creation and acid-accumulation.There has been observed the positive influence of using modification of the carbohydrate composition of flour in the technology of rice bread on the specific volume, porosity structure and flexible-elastic properties of crumb of ready products.It has been established, that realization of hydrolysis of flour starch at producing rice bread favors prolongation of its fresh storage term as a result of raising the amount of dextrins, created under the effect of α-amylase

Effect of a sorbent composition based on aluminum oxide and polydimethylsiloxane on the reproductive system of <i>db/db</i> female mice with genetically determined obesity and type 2 diabetes mellitus

Metabolic syndrome, obesity, type 2 diabetes mellitus are characterized by the accumulation of toxic metabolic products in the internal environment of the organism. The development of innovative medicines based on a sorbent matrix modified with  biologically active molecules remains relevant. The sorbent composition from aluminum oxide and polydimethylsiloxane is considered promising. The aim of the study. To investigate the effect of the sorbent composition from aluminum oxide and polydimethylsiloxane on the uterus and ovaries of db/db  mice with obesity and type 2 diabetes mellitus. Materials and methods. The sorbent composition (0.665 g/kg in 200 μl of distilled water) was administered to 14-week-old animals through an intragastric tube once a day for 7 days. The comparison groups were female rats injected with placebo (daily intragastrical administration of 200 µl of water for 7 days) and intact animals. Digital images of light-optical preparations stained with hematoxylin and eosin were processed using Image-Pro Plus 4.1 software. In the ovaries, the numerical density of primordial, primary, secondary follicles and corpus luteum was determined. The width of the uterus layers, the diameters of the blood and lymphatic vessels, the width of the interstitial fissures in both organs were measured. The statistical significance of differences was determined using the Mann – Whitney test. Results. In the myometrium and endometrium of the uterus of db/db mice, dilatation of arteries, veins, lymphatic vessels and edema were noted due to the accumulation of tissue fluid in the interstitium layers. There were no tertiary follicles in the ovaries. The introduction of the sorbent composition contributed to a decrease in the diameters of arteries, veins, lymphatic vessels of the uterus, a decrease in edema in both organs due to the narrowing of the prelymphatic slits, and stimulated an increase in the numerical density of secondary follicles. Conclusion. A corrective effect of the sorbent composition of aluminum oxide and  polydimethylsiloxane on prelymphatic slits, blood and lymphatic vessels in the uterus and ovaries in db/db mice with obesity and type 2 diabetes mellitus was revealed

Experimental and theoretical research of the interaction between high-strength supercavitation impactors and monolithic barriers in water

The article describes experimental and theoretical research of the interaction between supercavitating impactors and underwater aluminum alloy and steel barriers. Strong alloys are used for making impactors. An experimental research technique based on a high-velocity hydro-ballistic complex was developed. Mathematical simulation of the collision the impactor and barrier is based on the continuum mechanics inclusive of the deformation and destruction of interacting bodies. Calculated and experimental data on the ultimate penetration thickness of barriers made of aluminum alloy D16T and steel for the developed supercavitating impactor are obtained

Цифровий псевдолінійний регулятор для автоматичних систем управління неперервними об’єктами

Викладено порядок синтезу цифрового псевдолінійного регулятора для автоматичних систем управління неперервними об’єктами. В основу синтезу покладено перетворення аналогового регулятора в дискретну форму. Регулятор подано як двоканальний коректуючий пристрій з окремим формуванням амплітудної та фазової частотних характеристик пристрою, що дозволяє впливати на властивості системи управління як в перехідному, так і сталому режимах роботи. Наводяться результати математичного моделювання.The order of synthesis of digital pseudolinear regulator is expounded for automatic control system by continuous objects. In basis of synthesis converting of analog regulator is fixed into a discrete form. A regulator is given both dual-link correcting device with the separate forming of peak and phase frequency descriptions of device, that allows to influence on properties of control system as in transitional and permanent office hours. Results over of mathematical design are brought

High-speed impact of the metal projectile on the barrier containing porous corundum-based ceramics with chemically active filler

The paper presents a calculation-experimental study on high-speed interaction of the metal projectile with a combined barrier made of porous corundum-based ceramics filled with chemically active composition (sulfur, nitrate of potash) in the wide range of speeds. A mathematical behavior model of porous corundum-based ceramics with chemically active filler is developed within the scope of mechanics of continuous media taking into account the energy embedding from a possible chemical reaction between a projectile metal and filler at high-speed impact. Essential embedding of inlet heat is not observed in the considered range of impact speeds (2.5 … 8 km/s)

ТЕОРЕТИЧНІ ПЕРЕДУМОВИ ТЕХНОЛОГІЇ КУЛІНАРНОГО НАПІВФАБРИКАТУ ДЛЯ ПЮРЕПОДІБНИХ ПЕРШИХ СТРАВ

The results of theoretical justification of the culinary semi product for the first dishes, that allow to speed up the process of soups puree cooking, expand its assortment in the institutions of restaurant household, are presented. It is determined, that among hydro colloids it is advisable to choose modified starches, that are able to cope with the temperature of pasteurization. For emulsion stabilization it is proposed to use surface active substances in the technology of the culinary semi product.&nbsp; &nbsp;В статье проанализированы современные технологии полуфабрикатов для первых блюд и установлено, что большинство разработок касается сухих концентратов, которые имеют полностью сформирован вкусовой фон и требуют определенных условий восстановления. Представлены результаты теоретического обоснования технологии кулинарного полуфабриката для первых блюд, который позволяет ускорить процесс приготовления супов-пюре, расширить их ассортимент в заведениях ресторанного хозяйства. Определено, что среди гидроколоидив целесообразно использовать модифицированные крахмалы, которые способны выдерживать температуру пастеризации. Для стабилизации эмульсии предложено использование поверхностно-активных веществ (ПАВ) в технологии кулинарного полуфабриката.У статті проаналізовано сучасні технології напівфабрикатів для перших страв та встановлено, що більшість розробок стосується сухих концентратів, які мають повністю сформований смаковий фон та потребують певних умов відновлення. Представлено результати теоретичного обґрунтування технології кулінарного напівфабрикату для перших страв, що дозволяє прискорити процес приготування супів-пюре, розширити їх асортимент у закладах ресторанного господарства. Визначено, що серед гідроколоїдів доцільно обирати модифіковані крохмалі, які здатні витримувати температуру пастеризації.&nbsp; Для стабілізації емульсії запропоновано використання поверхнево-активних речовин (ПАР) в технології кулінарного напівфабрикату. &nbsp

Synthesis of Nanoscale TiO2 and Study of the Effect of Their Crystal Structure on Single Cell Response

To study the effect of nanoscale titanium dioxide (TiO2) on cell responses, we synthesized four modifications of the TiO2 (amorphous, anatase, brookite, and rutile) capable of keeping their physicochemical characteristics in a cell culture medium. The modifications of nanoscale TiO2 were obtained by hydrolysis of TiCl4 and Ti(i-OC3H7)4 (TIP) upon variation of the synthesis conditions; their textural, morphological, structural, and dispersion characteristics were examined by a set of physicochemical methods: XRD, BET, SAXS, DLS, AFM, SEM, and HR-TEM. The effect of synthesis conditions (nature of precursor, pH, temperature, and addition of a complexing agent) on the structural-dispersion properties of TiO2 nanoparticles was studied. The hydrolysis methods providing the preparation of amorphous, anatase, brookite, and rutile modifications of TiO2 nanoparticles 3–5 nm in size were selected. Examination of different forms of TiO2 nanoparticles interaction with MDCK cells by transmission electron microscopy of ultrathin sections revealed different cell responses after treatment with different crystalline modifications and amorphous form of TiO2. The obtained results allowed us to conclude that direct contact of the nanoparticles with cell plasma membrane is the primary and critical step of their interaction and defines a subsequent response of the cell

Experience of using MRT imaging in specifying diagnosis of obstructive diseases of the biliopancreatoduodenal zone.

The article presents the experience of surgical treatment of 12 patients with pancreatic cancer who were treated at the clinic of the Department of Surgery No. 2 of the ONMEDU during 2017. As a preoperative diagnosis, an MRI scan was performed in these patients. In general, the intraoperative size of the tumor was not significantly different from MRI - sizes: the medians of their differences were only + 5.5 mm and + 3.5 mm for the average and maximum MRT sizes. The calculated sensitivity and specificity of the method of MRTand CT in the assessment of artery invasion was 83.3% and 71.4% respectively, in the assessment of vein invasion - up to 50.0% and 42.9%, respectively. The combination of MRI and CT with intravenous contrast is the best option for planning surgical tactics today

Experience of using MRT imaging in specifying diagnosis of obstructive diseases of the biliopancreatoduodenal zone.

The article presents the experience of surgical treatment of 12 patients with pancreatic cancer who were treated at the clinic of the Department of Surgery No. 2 of the ONMEDU during 2017. As a preoperative diagnosis, an MRI scan was performed in these patients. In general, the intraoperative size of the tumor was not significantly different from MRI - sizes: the medians of their differences were only + 5.5 mm and + 3.5 mm for the average and maximum MRT sizes. The calculated sensitivity and specificity of the method of MRTand CT in the assessment of artery invasion was 83.3% and 71.4% respectively, in the assessment of vein invasion - up to 50.0% and 42.9%, respectively. The combination of MRI and CT with intravenous contrast is the best option for planning surgical tactics today

Ce-doped Li6Ln(BO3)3 (Ln = Y, Gd) Single crystals fibers grown by micro-pulling down method and luminescence properties

Ce3+-doped borate crystal fibers of Li6Gd(BO 3)3 (LGBO) and Li6Y(BO3)3 (LYBO) compositions are grown by the micro-pulling down (μ-PD) method for potential application in developing new neutron detectors. The ternary equilibrium diagram of Li2O-Gd2O3-B 2O3 is drawn and the preparations of homogeneous mixed LGBO and LYBO powders and growth conditions for single crystal fibers are discussed. Absorption, excitation and X-ray luminescence spectra are investigated. Absolute light yield derived from energy spectra and kinetic decay curves measured under α- and γ-scintillations of Ce 3+-doped LGBO and LYBO single crystal fibers is provided. © 2012 Elsevier B.V. All rights reserved