Purpose Over the recent years, solar energy has received outstanding attention from researchers. Solar energy applications and related large-scale projects are increasing to meet growing global energy demand as an economical, non-polluting and renewable energy source. The purpose of this study is investigating different plenum and absorber configurations of solar air heating wall (SAHW) experimentally and numerically. Design/methodology/approach In this study, various configurations of SAHW have been numerically simulated to determine the most effective design. According to the simulation results, two SAHWs with various plenum thicknesses have been fabricated and tested at different conditions. Findings Numerical simulation results indicated that parallel-flow SAHWs exhibited better performance in comparison with other placements of absorber plate. Regarding to the experimentally attained results, the highest thermal efficiency was reached to 80.51%. Also, the average deviation between experimentally and numerically obtained outlet temperature is 5.5%. Originality/value Considering the obtained results in the present study, designed SAHW has admissible efficiency to be used in various industrial and residential applications such as; air preheating, space heating and drying.

A 20-year-old woman presented with a 2-month history of an acute symmetrical eruption, manifesting as asymptomatic ill-defined erythematous macules and hyperkeratotic papules on the palms. The patient was a renal transplant recipient, and the lesions had developed 2 months post-transplantation. Histologically, the eruption shared features of a reactive inflammatory condition called papular eruption of atypical CD8+ lymphocytes as well as primary cutaneous acral CD8+ T-cell lymphoma (a provisional indolent entity in the new World Health Organisation classification of lymphoid neoplasms, 2016). The latter disorder has been described to occur at acral sites in immunocompetent patients, whereas the former has previously been described only in patients infected with human immunodeficiency virus. The lesions in our patient healed after topical treatment with corticosteroids and alteration of immunosuppressive therapy, supporting the role of immunosuppression in this case. We classified our patient's condition as lying in the spectrum of the aforementioned two conditions, but the relationship between both diseases remains to be clarified. Awareness of these unusual conditions may prevent the use of unnecessary aggressive therapies in similar patients.

Objective:Monoclonal B lymphocytosis (MBL) is considered to be a precursor state for chronic lymphocytic leukemia (CLL). This study was planned to evaluate the MBL prevalence in first-degree relatives of CLL patients in Turkey, which is considered to be an ethnic and geographic bridge between the Eastern and Western worlds. Materials and Methods:A total of 136 volunteers [median age: 40 (17-77) years; male/female: 60/76] from 61 families were included. Flow cytometry analysis by 4-colour staining was used for MBL diagnosis. Results:MBL was demonstrated in 17 cases (12.5%). A total of 14 cases (10.3%) were classified as CLL-like MBL, while 3 (2.2%) exhibited a non-CLL-like phenotype. The prevalence of MBL was 12.72% in subjects aged less than 40 years, 12.28% in subjects between 40 and 60 years, and 40% in subjects over 60 years, without statistical significance (p>0.05). A total of 115 cases were evaluated for intermarriage, which was observed in 19 cases (16.5%). The prevalence of MBL did not differ based on intermarriage status (p>0.05).Conclusion:The current report is the first MBL prevalence study in a Eurasian population that demonstrates a similar distribution pattern of MBL in Anatolian CLL kindreds. Further efforts should be made to refine our understanding of the natural history and clinical outcomes of MBL.

A 48-year-old man was diagnosed Acute myeloid leukemia with FLT3 ITD positive and PML/RAR?- negative. Remission was achieved after induction and consolidation chemotherapy. Allogeneic hematopoietic stem cell transplantation was performed from his full matched sibling donor. He relapsed after 5 years and his bone marrow examination revealed PML/RAR?- positive Acute promyelocytic leukemia. t(15:17) was positive and FLT-3 ITD was negative. Cytogenetic and molecular analysis confirmed donor cell origin. Donor didn’t develop Acute promyelocytic leukemia.

Large population-based studies and standardized laboratory methods are needed to determine the potential risk factors of progression to CLL, including molecular markers and genetic profile.