The transfer function and the transfer coefficient of a precision electromagnetoelastic engine for nanobiomedical research are obtained. The structural diagram of an electromagnetoelastic engine has a difference in the visibility of energy conversion from Cady and Mason electrical equivalent circuits of a piezo vibrator. The structural diagram of an electromagnetoelastic engine is founded. The structural diagram of the piezo engine for nanobiomedical research is written. The transfer functions of the piezo engine or are obtained.

Truffles are ectomycorrhizal mushrooms that grow in specific climates. They are rare and famous for their secondary metabolites and their promising biological activities. Truffles are considered from the most expensive macrofungi all over the world. Understanding the rare and uncommon types of interaction between truffles and their different invadors is of high significance. However, studies describing such relation are very limited. In this review, we describe general description and ecology of truffles. Examples on microbes attracted to colonize fruiting bodies of truffles were mentioned. Finally, factors causing truffles damage such as pathogenic fungal attacks, truffles rot, and insects’ invasion were highlighted.

Hindfoot pain is a common clinical problem that can be due to multiple alterations, it can appear due to bone or soft tissue causes, it is established in a small anatomical area. There are different methods of treatment for these conditions, ranging from simple guidelines in lifestyle to surgery. In this work, patients are divided into four groups with different treatment methods, each group was assigned a different therapeutic option, which will increase its degree of invasion as the number of the group increases. Infiltration with platelet-rich plasma (PRP) is a new technique of cell regenerative therapy and was applied in one of the groups, taking advantage of the regenerative, healing and anti-inflammatory properties of the mentioned therapy.

To date, only a few rare cases of severe forms of Covid-19 in children, especially infant, have been described in other parts of the world. So far no case reported in sub-Saharan Africa (SSA). We report the case in the Democratic Republic of Congo of an infant of 4 months and 8 days old, who presented after malaria disease, a picture of bronchopneumonia with severe respiratory failure (Pa O2 :49 mmHg). The RT-PCR made it possible to diagnose a Covid-19 of severe form. The infant had probably been infected by his mother and had no other co-morbidities that could induce a decrease in immunity. The CT scan injuries were comparable to those described in adults. Under oxygen, anticoagulation, hydroxychloroquine and Azythromycin, the outcome was good. Pediatricians in SSA countries should be careful and not miss cases of COVID19 in infant population with severe respiratory syndrome usually observed in most of lung infectious disease.

Paleopathology is the branch of science that is responsible for the study of diseases suffered by our ancestors, in Cuba some studies have been carried out on pathologies suffered by the aborigines. The objective is to present a specimen of human diaphyseal bone found in the funerary site of the "Cueva de los Chivos" in the Sumidero de Jibacoa Valley, Guamuhaya mountain massif, municipality of Manicaragua, Villa Clara province, Cuba in excavations carried out between the years 2000 and 2002 by the archeology group of the Center for Environmental Studies and Services of CITMA in Villa Clara. Presentation: It is a tibia fragment due to its thickness and triangular shape with periosteal thickening, cortical irregularity and a large number of crypts, whose radiography shows the presence of bone sequestration with the corresponding involvement and signs of periostitis. The skeletal remains found show evidence of having suffered from chronic osteomyelitis. Based on the archaeological materials found at the funerary site, it was determined that these belonged to pre-agricultural pottery groups that populated the island between 2000 and 6000 years ago. Conclusions: The Cuban aboriginal groups had elementary knowledge of orthopedic conditions such as bone infections and their treatment in all probability, evidenced by the chronicity of osteomyelitis presented in this specimen which survived for a period of time.