Морфологическое строение печени у кур (обзор)

The analysis of the literature of our country and of foreign literature shows that the information about the poultry's lever morphology is little, of uncoordinated and fragmentary character and sometimes even conflicting. The morphogenesis of poultry's lever in the most critical periods and phases of the postnatal ontogenesis is not fully revealed. The peculiarities of lever structure and development depending on the intensity of raising and fattening of poultry are little-studied and need further inquiry.Анализ отечественной и зарубежной научной литературы показывает, что сведения о морфологии печени у птиц малочисленны, носят разрозненный и фрагментарный характер и иногда противоречивы. Недостаточно полно раскрыт морфогенез печени у птиц в наиболее критические этапы и фазы постнатального онтогенеза. Особенности строения и развития печени в зависимости от интенсивности выращивания и откорма птицы малоизученны и требуют дальнейшего исследования

Особенности восстановления ортованадатов редкоземельных элементов (РЗЭ = LA, ND, SM, DY, HO, ER, TM, YB, LU)

The reduction specifics of REE orthovanadates LnVO4 (Ln = La, Nd, Sm, Dy, Ho, Er, Tm, Yb, and Lu) have been studied using the temperature-programmed reduction (TPR) method. Hydrogen and carbon monoxide were chosen as reducing agents. The reduction temperature is found to depend both on the REE and the reducing agent. REE orthovanadates are reduced in the range 1033–1153 K not forming phases that contain vanadium in intermediate oxidation states. In CO, the reduction temperature is found to be higher than in H2 for all orthovanadates. TPR data have been used to calculate the activation energies of reduction of REE orthovanadates using the Kissinger equation. The effective activation energies of reduction depend on the REE and the reducing agent and are in the range 41–147 kJ/mol.Методом температурно-программированного восстановления (ТПВ) изучены особенности восстановления ортованадатов РЗЭ состава LnVO4 (Ln = La, Nd, Sm, Dy, Ho, Er, Tm, Yb, Lu). В качестве восстановителя были использованы водород и монооксид углерода. Установлено, что температура восстановления зависит как от природы РЗЭ, так и от природы восстановителя. Восстановление ортованадатов РЗЭ протекает в температурном интервале 1033–1153 K без образования фаз, содержащих ванадий в промежуточных степенях окисления. Было показано, что при восстановлении в СО температура процесса для всех ортованадатов выше, чем при восстановлении в H2. С использованием данных ТПВ и уравнения Киссинджера рассчитаны энергии активации восстановления ортованадатов РЗЭ. Эффективные энергии активации процессов восстановления зависят от природы РЗЭ и восстановителя и находятся в диапазоне 41–147 кДж/моль

Reduction specifics of rare-earth orthovanadates (REE = La, Nd, Sm, Dy, Ho, Er, Tm, Yb, and Lu)

The reduction specifics of REE orthovanadates LnVO4 (Ln = La, Nd, Sm, Dy, Ho, Er, Tm, Yb, and Lu) have been studied using the temperature-programmed reduction (TPR) method. Hydrogen and carbon monoxide were chosen as reducing agents. The reduction temperature is found to depend both on the REE and the reducing agent. REE orthovanadates are reduced in the range 1033-1153 K not forming phases that contain vanadium in intermediate oxidation states. In CO, the reduction temperature is found to be higher than in H2 for all orthovanadates. TPR data have been used to calculate the activation energies of reduction of REE orthovanadates using the Kissinger equation. The effective activation energies of reduction depend on the REE and the reducing agent and are in the range 41-147 kJ/mol. © 2016 Pleiades Publishing, Ltd

Reduction specifics of rare-earth orthovanadates (REE = La, Nd, Sm, Dy, Ho, Er, Tm, Yb, and Lu)

The reduction specifics of REE orthovanadates LnVO4 (Ln = La, Nd, Sm, Dy, Ho, Er, Tm, Yb, and Lu) have been studied using the temperature-programmed reduction (TPR) method. Hydrogen and carbon monoxide were chosen as reducing agents. The reduction temperature is found to depend both on the REE and the reducing agent. REE orthovanadates are reduced in the range 1033-1153 K not forming phases that contain vanadium in intermediate oxidation states. In CO, the reduction temperature is found to be higher than in H2 for all orthovanadates. TPR data have been used to calculate the activation energies of reduction of REE orthovanadates using the Kissinger equation. The effective activation energies of reduction depend on the REE and the reducing agent and are in the range 41-147 kJ/mol. © 2016 Pleiades Publishing, Ltd

Interactions of rare-earth molybdates(V) of composition LnMoO4 (Ln = La, Nd, Gd, Dy, Er) with sulfur

The interaction of rare-earth molybdates of composition LnMoO4 (Ln = La, Nd, Gd, Dy, Er) with sulfur is studied. Gadolinium molybdate yields a single-phase product. Its unit cell parameters were calculated from indexing of its X-ray diffraction pattern. The thermal stability of the interaction products of LnMoO4 with sulfur is studied

Features of propane conversion in the presence of SmVO3 and SmVO4

Features of propane conversion in the presence of samarium vanadite and samarium vanadate, both produced via solid-phase synthesis, are studied. It is shown that SmVO3 catalyzes mainly the propane cracking process to form methane and ethylene, while SmVO4 equally accelerates both cracking and the dehydrogenation of propane. Based on the results from catalytic experiments, energies of activation are calculated for the thermal cracking of propane (104 kJ/mol) and the conversion of propane in the presence of SmVO3 (39 kJ/mol) and SmVO4 (42 kJ/mol). The thermal stability of SmVO4 in a hydrogen atmosphere is studied via temperature-programmed reduction, while SmVO3 stability in an oxidizing environment is studied by DTA. Energies of activation for the reduction of SmVO4 (75 kJ/mol) and the oxidation of SmVO3 (244 kJ/mol) are calculated using the Kissinger method. © 2016, Pleiades Publishing, Ltd

Solubility Polytherms from 25 to 75 degrees C for Aqueous Systems of Lanthanum or Gadolinium Iodide with Potassium or Ammonium Iodide

Solubility in the (La,Gd)I(3)-(K,NH(4))I-H(2)O systems was studied by the isothermal method over the temperature range 25-75 degrees C. The solubility isotherms at 25, 50, and 75 degrees C have a eutonic character. Regions of crystallization were determined for LnI(3) center dot nH(2)O, where Ln = La or Gd and n = 3, 4, 6, or 9. Raising the concentration of a lanthanide iodide has a salting-out effect on potassium and ammonium iodides

Effect of the anionic composition and pH on the dissolution kinetics of chromium(III) oxide and chromium(III) hydroxide oxide in acids

Based on an experimental investigation of the effects of the pH and anionic composition on the dissolution rate of chromium(III) oxide α-Cr2O3 and chromium(III) hydroxide oxide α-CrOOH and subsequent modeling of the process, it is demonstrated that, depending on the pH, the rate-controlling stage of the dissolution is the CrOH2+ or CrHSO 4 2+ sobulization. © Pleiades Publishing, Inc., 2006