Investigation of the Influence of Pulse Magnetic Field and Adsorbed Water on the Properties of Wood by the Method of Infrared Spectroscopy

Саушкин, Виктор; Matveev, N. N.; Postnikov, V. S.; Postnikov, V. M.; Kamalova, Nina; Лсицын, Виктор; Lsicyn, Viktor; Evsikova, Natalia Yu.; Evsikova, Natalya; Жужукин, Константин; Нгуен, Хоай Тхыонг; Nguen, Hoay Thyong

doi:10.12737/article_5b24061b468a19.01199073

Cited by 3 publications

(2 citation statements)

References 5 publications

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“…На рис. 1 приведена зависимость биомассы насаждения от возраста для нормального (полного) древостоя сосны Iа класса бонитета [9]. из зависимости видно, что в определенный период развития древостоя его биомасса достигает максимума, после чего начинает плавно уменьшаться (такая зависимость является типичной для многих насаждений [5,16]).…”

Section: объекты и методы исследованияunclassified

Modeling the Forest Stand Growth Dynamics Based on the Thermodynamic Approach

Lisitsyn¹,

Drapalyuk²,

Matveev³

2022

Lesnoy Zhurnal (Forestry Journal)

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The forest ecosystem is a common example of the functioning of open thermodynamic systems. The work analyzes the change in the entropy of an open thermodynamic system where the following processes can be realized: absorption of short-wave solar radiation – differentiation process; total biomass growth process associated with the consumption of resources for respiration and competition. As a result of these processes, the negative entropy flow enters the system, and the positive entropy is produced in the system. As the stand grows, its biomass reaches a maximum, which corresponds to the steady state in the ecosystem. It is shown that, in accordance with the Prigogine’s theorem, the specific entropy production in an open system takes on a minimum positive value. With a further increase in the age of the stand, the steady state of the open thermodynamic system evolves to an equilibrium state, at which a decrease in the plant biomass is observed, and the entropy tends to a maximum value in accordance with the 2nd law of thermodynamics (ecosystem decay). The analysis of the behavior of an open thermodynamic system forms the basis of a new ecological and physiological model of the stand growth dynamics. The model proposed uses the following parameters: the biomass of an individual tree and the number of trees per hectare. In order to model the biomass growth dynamics of an individual tree, the von Bertalanffy equation is used. It contains a dynamic equation describing growth of an individual due to resource uptake and limitation of growth due to resource consumption. The equation that characterizes the dynamics of stand size derives from the condition of reaching the maximum biomass of the stand during the stand’s growth. In general, the stand’s dynamics model has only three independent parameters. They are the onset time of the steady state, the resource consumption rate and the factor linking the area and biomass of the organism. The model verification is presented by calculating the biomass dynamics for full (normal) pine plantations of the first five quality classes (Ib, Ia, I, II, III). The model’s quality is assessed by the dimensionless Nash-Sutcliffe model efficiency coefficient, the value of which is usually greater than 0.95. This corresponds to a description of the data that is close to ideal.

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Section: объекты и методы исследованияunclassified

Modeling the Forest Stand Growth Dynamics Based on the Thermodynamic Approach

Lisitsyn¹,

Drapalyuk²,

Matveev³

2022

Lesnoy Zhurnal (Forestry Journal)

View full text Add to dashboard Cite

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“…Прямые эксперименты по рентгеноструктурному анализу [23] и ИК-спектроскопии [24] показали, что целлюлоза находится в кристаллическом состоянии в любом температурном интервале вплоть до температуры деструкции. По методике, описанной в работе [5], нами зарегистрированы поляризационные токи (рис.…”

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Polarizing effect in natural polymer cellulose

et al. 2019

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For the first time, a method based on the registration of polarization and depolarization currents arising in wood in a non-uniform temperature field was used to study the properties of cellulose. The purpose of the method used is to record the relaxation of bound charges with a change in the temperature of the sample under study. It is shown that the detected low-temperature transitions have a crystal-crystal polarization mechanism, and the natural polymer cellulose is an active dielectric.

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Adsorption and dielectric properties of natural composite polymer wood

et al. 2020

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The state of water in a natural polymer, wood, was studied by its eﬀ ect on the dielectric parameters and currents of thermostimulated depolarization (TSD) of the adsorption system. It has been shown that surface wood hydroxyls do not play a signiﬁ cant role in the adsorption of water, which occurs mainly in pores of varying volume. Interpretation of the behavior of the TSD currents showed that at the initial stage the polarization linearly depends on the water adsorption value, then this linearity is violated, which we associate with the onset of migration polarization.

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Investigation of the Influence of Pulse Magnetic Field and Adsorbed Water on the Properties of Wood by the Method of Infrared Spectroscopy

Cited by 3 publications

References 5 publications

Modeling the Forest Stand Growth Dynamics Based on the Thermodynamic Approach

Modeling the Forest Stand Growth Dynamics Based on the Thermodynamic Approach

Polarizing effect in natural polymer cellulose

Adsorption and dielectric properties of natural composite polymer wood

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