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It is also shown that the present DSCF method can yield fast and robust convergence with near-linear scaling in performance with increase in system size. © 2020 Wiley Periodicals, Inc.Mycodextran-also known as nigeran-is an unbranched polysaccharide made of α-d-glucopyranose units alternatively connected by (1 → 3) and (1 → 4) glycosidic linkages produced intracellularly by Aspergillus niger and Penicillium crustosum. In this work we examine possible enforced conformational transitions in the glucopyranose rings in the nigeran oligosaccharide chains. In order to simulate such structural changes we used the Enforced Geometry Optimization (EGO) method. © 2020 Wiley Periodicals, Inc.Low doses of acetylsalicylic acid (aspirin) are recommended in some venous thromboembolism prophylaxis guidelines for total knee replacement arthroplasty surgery. As salicylic acid has antimicrobial activity it would be advantageous if aspirin's use reduced the risk of prosthetic joint infection. We measured salicylate levels in the synovial fluid of patients taking long term low dose aspirin who were having knee arthroplasty surgery. Low levels of salicylic and salicyluric acids were present in synovial fluid immediately pre surgery. Acetylsalicylic acid was not measurable in synovial fluid. The measured salicylic acid levels were lower than those previously shown to have antibacterial activity against any of the bacteria that typically cause prosthetic joint infection. This article is protected by copyright. All rights reserved.Worldwide cases of confirmed COVID-19 are approaching three million, and citizens around the world are experiencing unprecedented changes to their lifestyles due to the measures implemented to slow the spread of the disease. This article is protected by copyright. All rights reserved.We explored the effects of atmospheric CO2 concentration (Ca ) and vapor pressure deficit (VPD) on putative mechanisms controlling leaf elongation in perennial ryegrass. Plants were grown in stands at a Ca of 200, 400 or 800 μmol&nbsp;mol-1 combined with high (1.17&nbsp;kPa) or low (0.59&nbsp;kPa) VPD during the 16&nbsp;h-day in well-watered conditions with reduced nitrogen supply. We measured daynight-variation of leaf elongation rate (LERday LERnight ), final leaf length and width, epidermal cell number and length, stomatal conductance, transpiration, leaf water potential and water-soluble carbohydrates and osmotic potential in the leaf growth-and-differentiation zone. Daily mean LER or morphometric parameters did not differ between treatments, but LERnight strongly exceeded LERday , particularly at low Ca and high VPD. Across treatments LERday was negatively related to transpiration (R2 =0.75) and leaf water potential (R2 =0.81), while LERnight was independent of leaf water potential or turgor. Enhancement of LERnight over LERday was proportional to the turgor-change between day and night (R2 =0.93). LGDZ sugar concentration was high throughout diel cycles, providing no evidence of source limitation in any treatment. Our data indicate a mechanism of diel cycling between daytime hydraulic and nighttime stored-growth controls of LER, buffering Ca and daytime VPD effects on leaf elongation. This article is protected by copyright. All rights reserved.While most pregnant women with coronavirus disease 2019 (COVID-19) appear to experience a milder clinical course [1,2], the present report describes a critical case of COVID-19 in a pregnant woman. We discuss the identification, diagnosis, disease progression, and treatment outcome in a 31-year-old pregnant woman admitted to Xiaolan People's Hospital of Zhongshan at 35+2 weeks of pregnancy with no known comorbidity or history of chronic illness. Onset of symptoms in the patient began with a sore throat and dry cough for 4&nbsp;days, followed by fever and dyspnea for half a day. This article is protected by copyright. All rights reserved.Since the beginning of coronavirus disease 2019 (COVID-19) pandemic outbreak, it has emerged that the clinical course and outcome of Severe Acute Respiratory Syndrome Coronavirus 2 (SARS-CoV-2) is definitely more favourable in children than in adults.1 Few cases of infection in children with cancer are described; also in these patients, except for one reported case,2 the disease was largely asymptomatic.3 Nevertheless, the management of COVID-19 in young patients with comorbidities, particularly cancer, remains a challenge for the clinician; further data are required to optimize the clinical approach to these cases. This article is protected by copyright. All rights reserved.Acute promyelocytic leukaemia and COVID-19 are two conditions associated with severe coagulopathy. [https://www.selleckchem.com/products/shr0302.html selleck products] We present here the multiple haemostasis abnormalities observed in a patient with concomitant acute promyelocytic leukaemia and COVID-19. The clinical consequences were dramatic and led to the death of the patient. A 62-year old woman was admitted on April 13, 2020 for unexplained asthenia, dyspnoea, and uncontrolled epistaxis. Clinical examination revealed pallor, left periorbital ecchymosis due to a recent fall, intrabuccal haemorrhagic bullae, persistent epistaxis, and mild splenomegaly. Oxygen saturation was 96%. Chest computed tomography (CT) was consistent with moderate COVID-19 pneumonia (9 points on a 0-25 scale)(Pan, et al 2020). The qRT-PCR of a nasopharyngeal swab was positive for SARS-CoV2. This article is protected by copyright. All rights reserved.Sutton et al. [1] recently reported on universal testing with nasopharyngeal swabs to detect severe acute respiratory syndrome coronavirus 2 (SARS-Cov-2) infection in 215 women admitted for delivery at the Presbyterian Allen Hospital in New York, USA. They identified 33 (15.3%) infected women, of whom only four had fever or symptoms suggesting coronavirus disease 2019 (COVID-19). These findings suggest that only universal testing can reliably recognize infected cases. However, this approach is only feasible in major hospitals in high-resource countries with efficient lab facilities in-house. Alternative approaches deserve consideration. This article is protected by copyright. All rights reserved.