34 results match your criteria: "HTW Berlin - University of Applied Sciences[Affiliation]"

The rapid development in agriculture and industrial sectors has raised some serious global issues like heavy metals pollution of water resources. Cadmium (Cd) is amongst the major water pollutants worldwide. In this study, two novel sorbents were prepared by using post-consumer textile waste (PCTW).

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Background: Protease 3C (3Cpro) is the only protease encoded in the human hepatitis A virus genome and is considered as a potential target for antiviral drugs due to its critical role in the viral life cycle. Additionally, 3Cpro has been identified as a potent inducer of ferroptosis, a newly described type of cell death. Therefore, studying the molecular mechanism of 3Cpro functioning can provide new insights into viral-host interaction and the biological role of ferroptosis.

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In situ cell for grazing-incidence x-ray diffraction on thin films in thermal catalysis.

Rev Sci Instrum

March 2024

Helmholtz-Zentrum Berlin für Materialien und Energie, 14109 Berlin, Germany.

A cell for synchrotron-based grazing-incidence x-ray diffraction at ambient pressures and moderate temperatures in a controlled gas atmosphere is presented. The cell is suited for the in situ study of thin film samples under catalytically relevant conditions. To some extent, in addition to diffraction, the cell can be simultaneously applied for x-ray reflectometry and fluorescence studies.

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Electrospun nanofiber mats have a high specific surface area and very small pores which can be tailored by the spinning process. They are thus highly suitable as filters for small particles and molecules, such as organic dyes. On the other hand, they are usually very thin and thus have low mechanical properties.

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Harnessing Machine Learning in Vocal Arts Medicine: A Random Forest Application for "Fach" Classification in Opera.

Diagnostics (Basel)

September 2023

Department of Audiology and Phoniatrics, Charité-Universitätsmedizin Berlin, Campus Charité Mitte, Charitéplatz 1, 10117 Berlin, Germany.

Vocal arts medicine provides care and prevention strategies for professional voice disorders in performing artists. The issue of correct "Fach" determination depending on the presence of a lyric or dramatic voice structure is of crucial importance for opera singers, as chronic overuse often leads to vocal fold damage. To avoid phonomicrosurgery or prevent a premature career end, our aim is to offer singers an improved, objective fach counseling using digital sound analyses and machine learning procedures.

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Solar spectra datasets at optimum and vertical installation angles in central Europe (Berlin) during 2020, 2021 and 2022.

Data Brief

June 2023

PVcomB/Helmholtz-Zentrum Berlin für Materialien und Energie GmbH, Schwarzschildstr.3, Berlin D-12489, Germany.

This article provides datasets containing three years worth of solar spectra for the optimum installation angle of 35° and the building-integrated-photovoltaics relevant vertical angle of 90°. These datasets were obtained by measuring the spectrally resolved solar spectra using a five minute interval, where two sets of spectrometers, which measure different ranges of the solar spectrum, were employed. In addition, a merged dataset of these two spectral measurements, related to every specific five minute interval measurement, is provided.

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Analytical methods fr direct quantitative -glycan analysis require a sequence of sample preparation and clean-up steps that result in reduced glycan recovery. Therefore, we aimed to combine glycan release and labeling steps. Based on the hypothesis that the reaction mechanism for oxidative chemical glycan release comprises a stable glycan isocyanate intermediate, we investigated whether this could be exploited for the in-situ preparation of fluorescent glycan conjugates.

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Measuring Physical Properties of Electrospun Nanofiber Mats for Different Biomedical Applications.

Membranes (Basel)

April 2023

Faculty of Clothing Technology and Garment Engineering, School of Culture + Design, HTW Berlin-University of Applied Sciences, 12459 Berlin, Germany.

Electrospun nanofiber mats are nowadays often used for biotechnological and biomedical applications, such as wound healing or tissue engineering. While most studies concentrate on their chemical and biochemical properties, the physical properties are often measured without long explanations regarding the chosen methods. Here, we give an overview of typical measurements of topological features such as porosity, pore size, fiber diameter and orientation, hydrophobic/hydrophilic properties and water uptake, mechanical and electrical properties as well as water vapor and air permeability.

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The number of cancer patients is rapidly increasing worldwide. Among the leading causes of human death, cancer can be regarded as one of the major threats to humans. Although many new cancer treatment procedures such as chemotherapy, radiotherapy, and surgical methods are nowadays being developed and used for testing purposes, results show limited efficiency and high toxicity, even if they have the potential to damage cancer cells in the process.

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Vibration emissions during the transport of boar semen for artificial insemination (AI) affect sperm quality. In the present study, the common influence of the following factors was investigated: vibrations (displacement index (D) = 0.5 to 6.

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New objective timbre parameters for classification of voice type and fach in professional opera singers.

Sci Rep

October 2022

Department of Audiology and Phoniatrics, Charité-Universitätsmedizin Berlin, Campus Charité Mitte, Charitéplatz 1, 10117, Berlin, Germany.

Voice timbre is defined as sound color independent of pitch and volume, based on a broad frequency band between 2 and 4 kHz. Since there are no specific timbre parameters, previous studies have come to the very general conclusion that the center frequencies of the singer's formants are somewhat higher in the higher voice types than in the lower ones. For specification, a database was created containing 1723 sound examples of various voice types.

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Chemical methods for glycan release have gained traction because of their cost efficiency, accelerated reaction time and ability to release glycans not amenable to enzymatic cleavage. Oxidative chemical glycan release via hypochlorite treatment has been shown to be a convenient and efficient method that yields N-glycans similar to classical PNGase F digestion. We observed that the initial steps of the suggested mechanism for the oxidative release of glycans from glycoproteins by hypohalites showed similarities to the initiating steps of the classical Hofmann rearrangement of carboxamides.

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PathoLive-Real-Time Pathogen Identification from Metagenomic Illumina Datasets.

Life (Basel)

August 2022

Bioinformatics Division (MF 1), Department for Methods Development and Research Infrastructure, Robert Koch Institute, 13353 Berlin, Germany.

Over the past years, NGS has become a crucial workhorse for open-view pathogen diagnostics. Yet, long turnaround times result from using massively parallel high-throughput technologies as the analysis can only be performed after sequencing has finished. The interpretation of results can further be challenged by contaminations, clinically irrelevant sequences, and the sheer amount and complexity of the data.

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The detection of brain tumors using magnetic resonance imaging is currently one of the biggest challenges in artificial intelligence and medical engineering. It is important to identify these brain tumors as early as possible, as they can grow to death. Brain tumors can be classified as benign or malignant.

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Organic Solvent Nanofiltration of Water-in-Oil Pickering Emulsions-What Influences Permeability?

Membranes (Basel)

November 2021

Department II, Chemical Engineering in Life Science Engineering, HTW Berlin-University of Applied Sciences, Wilhelminenhofstraße 75A, 12459 Berlin, Germany.

Pickering emulsions (PEs) have received increasing interest for their application in catalytic multiphase reactions. Organic solvent nanofiltration of PEs was shown to be a promising procedure for efficient and effective catalyst recycling. In this work, a systematic parameter study to identify the main influencing parameters on PE filtration was conducted for a large variety of PE compositions for the first time.

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Background: Accurate identification of older persons at risk of unplanned hospital visits can facilitate preventive interventions. Several risk scores have been developed to identify older adults at risk of unplanned hospital visits. It is unclear whether risk scores developed in one country, perform as well in another.

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Stability Assessment of p-i-n Perovskite Photovoltaic Mini-Modules Utilizing Different Top Metal Electrodes.

Micromachines (Basel)

April 2021

HySPRINT Innovation Lab, Helmholtz-Zentrum Berlin, Kekuléstrasse 5, 12489 Berlin, Germany.

Long-term stability is one of the major challenges for p-i-n type perovskite solar modules (PSMs). Here, we demonstrate the fabrication of fully laser-patterned series interconnected p-i-n perovskite mini-modules, in which either single Cu or Ag layers are compared with Cu/Au metal-bilayer top electrodes. According to the scanning electron microscopy measurements, we found that Cu or Ag top electrodes often exhibit flaking of the metal upon P3 (top contact removal) laser patterning.

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Monolithic perovskite/silicon tandem solar cell with >29% efficiency by enhanced hole extraction.

Science

December 2020

Young Investigator Group Perovskite Tandem Solar Cells, Helmholtz-Zentrum Berlin, 12489 Berlin, Germany.

Tandem solar cells that pair silicon with a metal halide perovskite are a promising option for surpassing the single-cell efficiency limit. We report a monolithic perovskite/silicon tandem with a certified power conversion efficiency of 29.15%.

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W/O Pickering emulsion preparation using a batch rotor-stator mixer - Influence on rheology, drop size distribution and filtration behavior.

J Colloid Interface Sci

August 2020

HTW Berlin - University of Applied Sciences, Department II, Process Engineering in Life Science Engineering, Wilhelminenhofstraße 75A, 12459 Berlin, Germany. Electronic address:

Hypothesis: Pickering emulsions (PE) are becoming of increasing interest for catalytic multiphase processes. Ultrafiltration of PE is a promising procedure for catalyst recovery to enable continuous processes. Dispersing conditions during production of PE are expected to significantly influence PE characteristics, and control of these properties is essential for robust process design.

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Network physiology describes the human body as a complex network of interacting organ systems. It has been applied successfully to determine topological changes in different sleep stages. However, the number of network links can quickly grow above the number of parameters that are typically analyzed with standard statistical methods.

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The impact of lipases on the rheological behavior of colloidal silica nanoparticle stabilized Pickering emulsions for biocatalytical applications.

Colloids Surf B Biointerfaces

January 2020

HTW Berlin - University of Applied Sciences, Engineering II, Life Science Engineering, Wilhelminenhofstraße 75A, 12459 Berlin, Germany. Electronic address:

The use of Pickering emulsions for biocatalytical applications has recently received increased attention in cases where hydrophobic reactants are involved. For process applications, knowledge of the emulsion's rheology is crucial for the fluid dynamical design of equipment and selection of operating conditions. Colloidal silica nanoparticle stabilized Pickering emulsions usually exhibit shear-thinning behavior caused by a complex particle-particle network.

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The Prevalence and Persistence of Dizziness in Older European Home Care Recipients: A Prospective Cohort Study.

J Am Med Dir Assoc

March 2020

Department of General Practice and Elderly Care Medicine, Amsterdam Public Health, Amsterdam UMC, Vrije Universiteit Amsterdam, Amsterdam, the Netherlands.

Objectives: The prevalence of different geriatric syndromes in older home care (HC) recipients is yet to be determined. Dizziness is often regarded as a geriatric syndrome. The natural course of dizziness in older people is still unknown, because of a lack of longitudinal studies.

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Signs of Inequality? Variations in Providing Home Health Care Across Care Organizations and Across European Countries in the IBenC Study.

Health Serv Insights

April 2019

Department of General Practice and Elderly Care Medicine, Amsterdam UMC, Vrije Universiteit, Amsterdam Public Health, Amsterdam, The Netherlands.

Most countries aim to allocate home health care to those in need in a fair and equal way. Equal allocation implies that the amount of home care a person receives would reflect the level of health impairment and the need for resources. It is not clear whether countries succeed in attaining this.

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Predictive genetic testing often entails challenging decisions about preventive measures and uncertain health-related risk predictions. Because of its increasing availability, it is important to assess how to debate it publicly. Newspaper content analysis represents a common and reliable way to investigate public discourse retrospectively.

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Feature relevance in physiological networks for classification of obstructive sleep apnea.

Physiol Meas

December 2018

Center of Biomedical Image and Information Processing, HTW Berlin-University of Applied Sciences Berlin, Berlin, Germany. Sleep Medicine Center, Charité-Universitätsmedizin Berlin, Berlin, Germany.

Objective: Physiological networks (PN) model couplings between organs in a high-dimensional parameter space. Machine learning methods, in particular artifical neural networks (ANNs), are powerful on high-dimensional classification tasks. However, lack of interpretability of the resulting models has been a drawback in research.

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