ЭКСПЕРИМЕНТАЛЬНАЯ ОЦЕНКА КОМПОЗИЦИОННОГО МАТЕРИАЛА НА ОСНОВЕ БЕЛКОВО-МИНЕРАЛЬНЫХ КОМПОНЕНТОВ И РЕКОМБИНАНТНОГО КОСТНОГО МОРФОГЕНЕТИЧЕСКОГО БЕЛКА-2 В КАЧЕСТВЕ ПОКРЫТИЯ ТИТАНОВЫХ ИМПЛАНТАТОВ

The influence of both, the composite material based on the protein-mineral components including the prolonged form of the recombinant human bone morphogenetic protein 2 (rhBMP-2) and the method of the titanium implant’s surface treatment, on the reparative osteogenesis and adhesion strength of the bone tissue – implant’s surface contact was evaluated. Covering of implants with the composite coating promotes significant acceleration of the bone tissue regeneration processes in the site of implants loading. The composition coating with prolonged form of the rhBMP-2 promoted increasing of the neogenic bone tissue’s adhesion with the implants, as compared with the coating without recombinant human bone morphogenetic protein. The implants treated with microarc oxidation demonstrated higher values of the breakout force during the separation of the implants from the bone than the implants treated with sandblasting method.Проведена оценка влияния композиционного материала на основе белково-минеральных компонентов, содержащего пролонгированную форму рекомбинантного костного морфогенетического белка-2 человека (rhВМР-2), и способа обработки поверхности титанового имплантата на репаративный остеогенез и адгезионную прочность контакта костной ткани с поверхностью имплантата. Нанесение на имплантаты композиционного препарата/покрытия способствовало значительному ускорению процессов регенерации костной ткани в месте введения имплантатов. Композиционное покрытие с пролонгированной формой rhBMP-2, способствовало увеличению адгезионных связей новообразованной костной ткани с поверхностью образцов по сравнению с покрытием, не содержащим рекомбинантного костного морфогенетического белка. Имплантаты с поверхностью, обработанной с помощью микродугового оксидирования, демонстрировали более высокие значения величины усилия отрыва имплантата от кости, чем модифицированные пескоструйной обработкой

Energy requirement for maintenance and gain for two genotypes of quails housed in different breeding rearing systems

This study aimed to estimate the energy requirements for maintenance and gain of Japanese and European quails under growth housed in two rearing systems: floor pens and cages. To determine maintenance requirements, two experiments were conducted with birds housed in cages in environmental chambers (experiment 1) and in floor pens at room temperature conditions (experiment 2). The experimental design was completely randomized with four levels of feed supply (100, 75, 50 and 25%) and four repetitions. Energy requirements for maintenance were estimated by the comparative slaughter method through a feeding trial. In experiment 1, 64 Japanese and European quails per treatment were housed in cages of climatic chambers at 18, 24, and 28 °C, while in experiment 2, 352 quails per treatment were housed in floor pens at room temperature (26 °C). To estimate gain requirements, five slaughters were performed with quails receiving feed ad libitum and housed under controlled temperature of 18 °C (experiment 3). Prediction equations were obtained to estimate requirements for maintenance and gain of energy for the two genotypes of quails. The room temperature and breeding system affected the estimates of energy requirements for maintenance. The genotypes presented different estimates for maintenance and gain. Prediction models should be developed considering the room temperature and quails' genotypes

Ethical Commitment, Financial Performance, and Valuation: An Empirical Investigation of Korean Companies

business ethics, ethical commitment, ethical commitment index, financial performance, valuation, Korea,