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Рисунок 3. Нижний эпидермис листа ивы белой
Данную структуру листа вполне можно назвать ксе-роморфной.
Скворцов А.К., Голышева М.Д. [7,-С.91-97], изучая особенности строения листьев рода Salix L., и сопоставив полученные результаты с данными Василевской В.К., [5,-С.5-17] Александрова В.Г., Мирославова Е.А. [3,-С.852-856] убедились в большой константности признаков анатомической структуры листа рода Salix L., свойственной таксонам различного ранга.
Наши исследования полностью подтверждают эти данные. Особенно харак-терно строение поперечного сечения и строение эпидермиса.
Александров В.Г., и Мирославов Е.А. [3,-С.852-856], изучая особенности структуры листьев некоторых видов ив, произрастающих на северо-западе СССР, утверждают, что «ни одна из ив Ленинградской области не произрастает в условиях, которые бы способствовали развитию ксероморфной структуры листьев; все ивы произрастают не только при достаточном, но даже избыточном увлажнении почвы. Листья собраны с растений, произрастающих в условиях, исключающих ксерофит-ные».
Таким образом, изученный нами вид ивы белой, ин-тродуцированный в предгорную аридную зону Каратау, обнаруживает совершенно сходное строение листа.
Список литературы
1. Александров В.Г., Цхакая К.Е. К проблеме степени пластичности листа и о возникновении ксероморф-ной структуры. //Тр. с/х. - Опытного учрежд. Дона и Сев. Кавказа.1926. -С.201-207
2. Александров В.Г., Александрова О.Г., Тимофеев С.А. Водоснабжение ли-ста и его строение.//Зап. научн. прикл. отд. Тифл. Бот. сада. -1921. вып.2. -С.75-86
3. Александров В.Г., Мирославов Е.А. Об особенностях структуры листьев некоторых видов ив, произрастающих на северо-западе СССР. //Бот.жур-нал.1962.т.Хт№>6. -С.852-856
4. Байтулин И.О., Проскуряков М.Л., Шкалин С.В. Системно - экологиче-ский подход к интродукции растений в Казахстане. ч.1-2. Алма -Ата. 1992. -С.78
5. Василевская В.К. Формирование листа засухоустойчивых растений. Ашхабад. 1954. -С.5-17.
6. Коновалов И.Н. Физиология интродуцируемых растений. М-Л., 1963. -С.8-
7. Прозина М.Н. Ботаническая микротехника. М.1960. -С.19-43
8. Скворцов А.К., Голышева М.Д. О некоторых особенностях строения ли-ста, важных для систематики и филогении рода Salix L. //Биол. науки. 1967. №5.-С.91-97.
NONCONTACT SEEDING
Sadikova Diana Gabdelfartovna,
PhD, researcher lab. of biological effects of non-ionizing radiation, Pushchino
Andreev Alexey Alexeevich
PhD, senior researcher lab. of biological effects of non-ionizing radiation, Pushchino
ABSTRACT
The aim of our study was to investigate the possibility of using ultrasonic waves to remove supercooling in the solutions without the use of mechanical seeding. Sono-freezing experimental set-up consists of a styrofoam chamber for freezing of the samples. Cooling were carried out in the vapor ofLN2 (-1300C). Fuchs-Rosenthal quartz chambers were used for the freezing of two identical samples. Freezing of samples was carried out in two chambers at once. One sample was a control, the other was subjected to ultrasonic irradiation (frequency of 0.88 MHz, power 1 W/cm2). Ultrasonic radiation significantly affects the kinetics of solution freezing. As a result of its exposure super cooling effect disappears. Thus, we conclude that short-term effect of ultrasound on the freezing process of supercooled aqueous solution at temperatures offreezing is more effective than seeding manufactured by hand.
Keywords: DW, distilled water; LN, liquid nitrogen; Me2SO, dymethylsulfoxide; PSS, physiological solution for sturgeon.
The rate of congelation is important for the process of reversible cryopreservation of live systems. During slow freezing in nitrogen vapor, ice particles are formed in the extracellular space. Cryoprotective solution can remain in the liquid
state in the cooling process for a long while at a temperature much lower than the freezing point of the solution (supercooling). The formation of ice is a probabilistic event. For freezing to occur, water molecules must assemble, by means of their
random movement, into an ice-like structure larger than a critical size. This critical size corresponding to an energy barrier: once this barrier is crossed, it becomes energetically favorable for more water molecules to join the ice structure, leading to the spontaneous propagation of ice.
As a result of a phase transition the liquid (solution) becomes ice. During the phase transition a saltatory change of the solution properties occurs. Its internal energy changes. The excess energy release is accompanied by a sharp rise in temperature, as well as crystallization, which can cause permanent damage to the frozen biological material.
In reality this change occurs with a finite velocity. This means that we need some time to compensate internal energy change. During this time, the phase transition does not occur immediately but gradually, accompanying this process with a release of a certain amount of energy. In order to make the phase transition run nonstop, one need to continuously remove (or add) heat to the system, or to compensate it with the system performance.
As a result, during this time, the point in the phase diagram that describes the system "freezes" (i.e., pressure and temperature remain constant) until the very completion of the process.
To minimize the detrimental effects of this phenomenon, supercooling must be minimized by artificially inducing the formation of ice.
This problem is usually solved by a mechanical seeding which is induction of the formation of ice crystals at temperatures near the freezing point that prevents supercooling. Seeding is usually performed manually by touching a test-tube containing a solution with the cells with forceps or another object that is cooled to the temperatures of liquid nitrogen [10], or can be accomplished by seeding the suspension with ice or some other nucleating agent [11], to encourage ice crystal formation.
The aim of our study was to investigate the possibility of using ultrasonic waves to remove supercooling in the solutions without the use of mechanical seeding [1].
The saline solution for sturgeon [3] was used as a base solution. All tested cryoprotective solutions were prepared in sterile distilled water (DW). Additional components: Me2SO - 10%, egg yolks - 10%. As a control distilled water was used.
A schematic representation of the experimental setup is shown in Fig. 1. Sono-freezing experimental set-up (Fig.1) consists of a styrofoam chamber for freezing of the samples. Cooling were carried out in the vapor of LN2 (-1300C). FuchsRosenthal quartz chambers were used for the freezing of two identical samples. The sample volume is 50 pl. Freezing of samples was carried out in two chambers at once. One sample was a control, the other was subjected to ultrasonic irradiation (frequency of 0.88 MHz, power 1 W/cm2). The distance from the ultrasonic emitter to a sample was 1 cm. Ultrasonic device UZD 1.01 F (Russia).Temperature control system was based on direct measurement of samples temperature by thermocouple logger ATT-2006 (Aktakom, Taiwan) with copper/con-stantan microthermocouples, 0.1 mm diameter. The temperature in the samples was determined simultaneously every 2 s. The results were recorded by computer. Mathematical analyses of data were carried out with the demo version of the program SigmaPlot 8 Demo.
The dynamics of freezing-thawing events in cryopro-tective solutions are presented in Fig. 2. Figure 2 shows the rate of cooling of the solutions when exposed to ultrasound and in control for the distilled water, physiological saline solution for sturgeon (PSS), PSS + 10% Me2SO, PSS + 10% Me2SO + 10% Egg yolk.
Ultrasonic radiation significantly affects the kinetics of solution freezing. As a result of its exposure super cooling effect disappears.
Area of supercooling is presented for illustration on a larger scale for clarity. We can see a characteristic change in the dynamics of supercooling, when exposed to ultrasound in the solution during freezing. Such a change is observed in all the studied solutions.
This effect may be closely associated with the basic structure and physical properties concepts of water.
USD 1.01F
Fuchs-Rosenthal count chamber
Styrofoam plate
Styrofoam Box
Figure 1. Sono-freezing experimental set-up. USD 1.01F - ultrasonic generator with emitter, ATT-2006 - electronic
thermometer.
Figure 2. Thermograms of the slow cooling of solutions. (—) - control. (_) - ultrasound irradiation in the process of cooling.
1 - distilled water, 2 - physiological saline solution for sturgeon (PSS), 3 - PSS + 10% Me2SO, 4 - PSS + 10% Me2SO + 10%
Egg yolk.
Recently, the theory of the structure of water has been based on the assumption that it is a crystal, or an ice-like structure. In 2006, it was shown that summation of the spectra with the red-shift of the center yields an OH band envelope which is similar to the massive ice spectrum. These spectral data seem to have allowed the hypothesis of existence of the dynamic ice-like (iceberg) structure of water hydrogen bonding network to be confirmed for the first time [7, 8]. Apparently the structure of water is a cluster, and in some cases has an icelike structure [4].
In 1986 the theory was put forward which stated that water consists of molecules of two types: ortho-and para-molecules H2O [6]. This was confirmed by further studies by Per-shin [9], which showed the possibility of tunnel exchange between states of a fraction of molecules of these liquids, which manifests itself as band centroid oscillations at a given temperature.
We know also that the ice-water phase transition and the destruction of the crystal structure of ice the "center-temperature" correspondence is broken, which manifests itself as a "jump" of the center of the OH band due to increased contribution of high-frequency wing. A similar jump was observed in water supercooled to -10 C [5]. The contribution to the high-frequency wing is made by the moving molecules of a solution, i.e. the heating of water leads to a statistical increase in the contribution of high-frequency wing.
The same authors published the observation that the OH-band center shift to the low-frequency wing was observed under water compression in a field of acoustic pulses of moderate intensity [2].
This suggests that moderate-intensity ultrasound waves in water promotes the formation of more water vapor-isomers, which leads to a change in the ice-like water structure. In other words, the ultrasonic wave changes the structure of water, which increases the number of clusters that are the possible center of the solution crystallization. As a result of such exposure the probability of nucleation of ice crystals is increased
and the freezing of the solution occurs with the effect of continuous noncontact ultrasonic seeding.
Noncontact ultrasonic seeding can remove the effect of supercooling. There is a gradual freezing of the aqueous solution.
Thus, we conclude that short-term effect of ultrasound on the freezing process of supercooled aqueous solution at temperatures of freezing is more effective than seeding manufactured by hand. Most likely the cryopreservation of living systems will be more effective in conjunction with ultrasound than with standard methods of freezing.
From the foregoing, we conclude that short-term effects of ultrasound on the freezing process of supercooled aqueous solution is more effective than siding manufactured by hand. Most likely the cryopreservation of living systems will be more efficient with the use of ultrasound than with standard methods of freezing.
References
A. A. Andreev, D. G. Sadikova, Ponomareva E. N., Krasilnikov A. A., Belova M. A method for reducing low-temperature jump cryoprotectant solutions. Patent No. 2540598, Application No. 2013125414, dated 31 may 2013. // Of the Invention. The utility model. Official bulletin of the federal service for intellectual property, patents and trademarks. 2014.
1. A.P. Brysev, A.F. Bunkin, R.V. Klopotov, L.M. Krutyanskii, A.A. Nurmatov, and S.M. Pershin. Spec-troscopy of spontaneous Raman scattering of a liquid-water local structure in the field of an intense ultrasound pulse // Optics and Spectroscopy, 93(2), (2002), 282-285.
2. E. Burzawa-Gerard, B.F. Goncharov, A. Dumas, Y.A. Fontaine. Further biochemical studies on carp gonadotropin (c-GTH); Biochemical and biological compari-
son of c-GTH and a gonadotropin from Acipenser stel-latus pall // Gen. Comp. Endocrinol. 29(4), (1976), 498505.
3. F. Franks, in: G.J. Morris, A. Clarke (Eds.). Effects of Low Temperature on Biological Membranes // Academic Press, London., 1981, pp. 3-19.
4. D.E. Hare and C.M. Sorensen. Interoscillator coupling effects on the OH stretching band of liquid water // J. Chem. Phys. 96(1), (1992), 13.
5. V. Konyukhov, A. Prokhorov, V. Tikhonov, V. Fai-sulaev. Rotationally selective condensation of heavy water in a supersonic carbon dioxide jet // JETP Lett. 43, (1986), 85.
6. S. M. Pershin. Two-liquid water // Physics of Wave Phenomena 13(4), (2005), 192-208.
7. S.M. Pershin. Harmonic oscillations of the concentration of H-bond in liquid water // Laser Physics 16(7), (2006), 1-7.
8. S. M. Pershin. Harmonic oscillations of the concentration of H-bonds in liquid water // Laser Physics 16(8), (2006), 1184-1190.
9. R.T. Pfaff, Y. Agca, Jun Liu, E. J.Woods, A. T. Peter, and J. K. Critser. Cryobiology of Rat Embryos I: Determination of Zygote Membrane Permeability Coefficients for Water and Cryoprotectants, Their Activation Energies, and the Development of Improved Cryopres-ervation Methods // Biology of Reproduction 63, (2000), 1294-1302.
10. F. P. Simione. Cryopreservation Manual, M.S. In cooperation with Nalge Nunc International Corp., Nalge Nunc International Corp., 1998.
СПЕКТРЫ ПЕПТИДНЫХ СОЕДИНЕНИИ, ВЫДЕЛЯЕМЫХ В ИНКУБАЦИОННУЮ СРЕДУ ЭРИТРОЦИТАМИ ЧЕЛОВЕКА В УСЛОВИЯХ ГИПЕРГЛИКЕМИИ
Садыхова Анна Викторовна1, Кленова Наталья Анатолиевна1, Лебедева Елена Алексеевна2
Аспиранты,
'Федеральное государственное образовательное учреждение высшего профессионального образования «Са-
марский государственный университет, Кафедра биологической химии (профессор Фролов Ю.П!)
2 Федеральное государственное образовательное учреждение высшего профессионального образования «Самарский государственный медицинский университет»
SPECTR'S OF PEPTIDE COMPOUNDS LEAVING INTO THE INCUBATION MEDIUM OF HUMAN'S ERYTHROCYTES IN
HYPERGLYCEMIA CONDITIONS
Sadykhova Anna1, Klenova Natalia1, Lebedeva Elena2
АННОТАЦИЯ
Проведено изучение общего количества и спектра пептидных соединений, поступающих в инкубационную среду Рингера-Локка из эритроцитов человека донорской крови после 60-ти минутной инкубации их при 3 7°С в условиях содержания глюкозы 5 мМ/л (нормогликемия) и 10 мМ/л (гипергликемия), а также при инкубации в условиях нормоглике-мии эритроцитов пациентов с сахарным диабетом I типа. Общее содержание пептидов в инкубационной среде эритроцитов из донорской крови в условиях гипергликемии выше на 19%, при изучении эритроцитов из крови пациентов с сахарным диабетом I типа общее содержание пептидов в инкубационной среде достоверно не отличалось от условий нормогликемии для эритроцитов из крови доноров, однако внутри эритроцитов было обнаружено превышение количества пептидов более, чем в 2,5 раза. Изучение спектра пептидных соединений методом капиллярного электрофореза выявило изменение спектра пептидов, выделяемых эритроцитами человека в инкубационную среду, как в условиях гипергликемии, так и у пациентов с сахарным диабетом I типа.
ABSTRACT
The study of the total number and range ofpeptide compounds entering the incubation medium Ringer-Locke from human erythrocytes of blood after 60 min incubation at 37 ◦ C in glucose 5 mmol/1 (normoglycemia) and 10 mmol/1 (hyperglycemiya) as well as the incubation of red blood cells in normoglycemia patients with I type diabetes. The total content of the peptides in the incubation medium donors in hyperglycemia above 19%, in patients with I type diabetes total peptides in the incubation medium was not significantly different from those of normoglycemia donors, but in erythrocytes was found to exceed the number ofpeptides more than 2.5 times. Study the spectrum of the peptide compounds by capillary electrophoresis has revealed change of the spectrum of peptides allocated to human erythrocytes of the into the incubation medium, both in the conditions hyperglycemia and for and at patients with I type diabetesAlpha
ВВЕДЕНИЕ эритроцитах человека [3, 4]. Авторами показано, что про-
Пептидная регуляция является одной из важней- теолиз гемоглобина в эритроцитах приводит к образова-
ших и многофункциональных систем у всех живых орга- нию около 50 пептидов, обладающих различной биологи-
низмов. Образование регуляторных пептидов тканеспеци- ческой активностью. Кроме того, процесс генерации
фично и представляет собой результат протеолитической пептидов проходит двуступенчато: эндопептидазами, а за-
деградации ряда функционально важных белков: гемогло- тем экзопептидазами. Это косвенно подтверждает то, что
бина, актина, ряда внутриклеточных ферментов в про- протеолитический комплекс ферментов в эритроцитах мо-
теосомах [1, 2]. жет быть частично представлен сохранившимися катали-
Было обнаружено образование пептидных соедине- тическими протеасомными субъединицами. Возможно
ний, являющихся фрагментами гемоглобина и актина в также частичное сохранение ряда регуляторных механизмов, обнаруживаемых в протеасомах других клеток [1, 2].
