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21:27 EST 23rd January 2020 | BioPortfolio

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Showing "meint Hans Bernecker EVOTEC" PubMed Articles, all 19

Interference from haloacetamides during the determination of haloacetic acids using gas chromatography.

Haloacetic acids (HAAs) are the second largest class of disinfection by-products (DBPs) by weight in water and are more cytotoxic and genotoxic to mammalian cells than trihalomethanes, the first largest class of DBPs. Gas chromatography (GC) is the most widely used technique for determining HAAs. Due to their polar nature, derivatization prior to GC analysis is required. Typically, derivatization is undertaken with acidic methanol, which converts HAAs to the corresponding methyl ester (haloacetic acid methy...


After DLVO: Hans Lyklema and the keepers of the faith.

Using UV/HO pre-oxidation combined with an optimised disinfection scenario to control CXR-type disinfection by-product formation.

The effects of UV/HO pre-oxidation or disinfection methods on the formation of partial disinfection by-products (DBPs) have been studied previously. This study assessed the effect of UV/HO pre-oxidation combined with optimisation of the disinfection method on the formation of six classes of CXR-type DBPs, including trihalomethanes (THMs), haloacetic acids (HAAs), haloacetaldehydes (HALs), haloacetonitriles (HANs), halonitromethanes (HNMs), and haloacetamides (HAMs). Experimental results showed that a simula...


Appreciation for 20 years co-editing of Der Nervenarzt and view to the future. Farewell to Prof. Wolfgang Maier and Prof. Hans-Peter Kapfhammer.

Hans Lyklema's promotion of colloid and Interface science on the international stage.

Formation of metastable disinfection byproducts during free and combined aspartic acid chlorination: Effect of peptide bonds and impact on toxicity.

The formation and occurrence of haloacetonitriles (HANs) in drinking water is of increasing concern because recent data have shown that they are the major contributors to DBP-associated toxicity of disinfected waters. Earlier research on HAN formation had established free amino acids as important HAN precursors due to their high reactivity with chlorine. However, free amino acids are unlikely to be the primary precursors for HANs in natural waters, mainly because the actual concentrations of these compounds...

Combined Analysis of 24 Type 2 Diabetes Genetic Risk Variants Indicates that Early-onset of Type 2 Diabetes in the Chinese Han Population can be Attributed Mainly to β-cell Function-related Genetic Risk.

To investigate the genetic factors contributing to early-onset type 2 diabetes (EOD) in the Chinese Hans populations.

Formation of iodinated trihalomethanes and noniodinated disinfection byproducts during chloramination of algal organic matter extracted from Microcystis aeruginosa.

The increasing occurrence of harmful algal blooms in surface waters may increase the input of algal organic matter (AOM) to the dissolved organic matter pool. The formation of iodinated trihalomethanes (I-THMs) and noniodinated disinfection byproducts (DBPs) in synthetic waters containing AOM extracted from Microcystis aeruginosa was investigated in chloramination (preformed and in-situ formed chloramine, NHCl and Cl-NHCl, respectively) and chlorination (Cl) processes. AOM is much more favorable for iodine ...

Changing NAFLD Epidemiology in China.

In Factfulness, the late Dr. Hans Rosling illustrated how most people grossly underestimated education, income, life expectancy, and vaccination rates in low-income countries. It is natural human psychology to have fixed images about the developing world. Nonetheless, the world is changing. According to the latest World Bank figures, 184 of 218 (84%) countries or regions are now classified as middle-income or high-income economies. Many countries previously labeled as developing countries (such as Armenia, ...

A Defense of the Phenomenological Account of Health and Illness.

A large slice of contemporary phenomenology of medicine has been devoted to developing an account of health and illness that proceeds from the first-person perspective when attempting to understand the ill person in contrast and connection to the third-person perspective on his/her diseased body. A proof that this phenomenological account of health and illness, represented by philosophers, such as Drew Leder, Kay Toombs, Havi Carel, Hans-Georg Gadamer, Kevin Aho, and Fredrik Svenaeus, is becoming increasing...

APPLICATION OF PROJECTIVE METHODS IN THE PREVENTION OF HIGH-DESTRUCTIVE BEHAVIOR OF STUDENTS.

Research objective - justification of efficiency of the comprehensive program with use of projective techniques in prevention auto-destructive behavior of students. Psychodiagnostic testing of individual and psychological features of the personality and an emotional condition of students before holding preventive actions are conducted. 40 students of medical college at the age of 17-20 with signs of disadaptation participated in a research. In work psychodiagnostic tests "the Questionnaire of EPQ", HADS, th...

The history and development of the Zeitschrift für Kinder- und Jugendpsychiatrie - Review and outlook on the occasion of its 45th anniversary.

The history and development of the - Review and outlook on the occasion of its 45th anniversary This article is based on archived documents and provides an overview of the founding of the and its precursor, the . The first volume of this journal appeared in 1973, 5 years after child and adolescent psychiatry had become an independent specialty in the Federal Republic of Germany. The founders of the journal and its first Editors-in-Chief were Hermann Stutte (1909-1982) and Hubert Harbauer (1019-1980). The...

Evidence-based analysis on the toxicity of disinfection byproducts in vivo and in vitro for disinfection selection.

Disinfection is a key step in drinking water treatment process to prevent water-borne infections. However, reactions between chlorine, one of the most common disinfectants, and natural organic matter (NOM) often lead to the formation of hazardous disinfection byproducts (DBPs). However, the cytotoxicity of some DBPs is still poorly understood. Such knowledge is critical for proper selection of disinfection processes. We investigated the effects of DBPs on mouse acute liver injury. The exacerbation of liver ...

Early insight into the potential contribution of aluminum to neurodegeneration - A tribute to the research work of Robert D. Terry, Igor Klatzo, Henryk M. Wisniewski and Donald R.C. Mclachlan.

The first successful attempt to obtain purified aluminum metal was accomplished by the Danish physicist and chemist Hans Christian Orsted in 1824, however it was not until about ~140 years later that aluminum's capacity for neurological disruption and neurotoxicity was convincingly established. The earliest evidence of the possible involvement of this biosphere-rich metallotoxin in Alzheimer's disease (AD) originated in the early-to-mid-1960's from animal and human research investigations that arose almos...

CDs@ZIF-8 modified thin film polyamide nanocomposite membrane for simultaneous enhancement of chlorine-resistance and disinfection byproducts removal in drinking water.

Reverse osmosis (RO) is an emerging membrane technology for disinfection byproducts (DBPs) removal. However, the chlorine-resistance and DBPs removal performance of thin film composite (TFC) polyamide membranes should be simultaneously improved when used in chlorinated drinking water. This study was dedicated to synthesize a novel nanoparticle of ZIF-8 with carbon dots (CDs@ZIF-8) and then modify thin film nanocomposite (TFN) membranes to enhance their performance in removing four trihalomethanes (THMs), fo...

The Chiari I malformation.

As with many pathologies, the course of our understanding of the Chiari I malformation (CIM) has developed extensively over time. The early descriptions of the Chiari malformations by Hans Chiari in 1891 opened the door for future classification and research on this topic. However, even over a long timeframe, our understanding of the pathophysiology and, more importantly, treatment, remained in its infancy. As recently as the 1970s, CIM was not discussed in popular neurology textbooks. Syringomyelia is list...

Immunohistochemical overexpression of BCL-2 protein predicts an inferior survival in patients with primary central nervous system diffuse large B-cell lymphoma.

This study was designed to analyze the clinical characteristics and prognostic value of c-MYC and BCL-2 proteins expression in patients with primary central nervous system diffuse large B-cell lymphoma (PCNS-DLBCL).82 patients newly diagnosed with PCNS-DLBCL, from January 2008 to November 2018, were enrolled in this study. Clinical characteristics, immunohistochemical features, laboratory examinations, and treatment outcome were analyzed among these patients.Among these 82 cases, 45 were males (54.9%) and 3...

Technical note: Concentrations of soluble, insoluble, and total dietary fiber in feed ingredients determined using Method AOAC 991.43 are not different from values determined using Method AOAC 2011.43 with the AnkomTDF Dietary Fiber Analyzer.

The primary objective of this experiment was to test the hypothesis that concentrations of soluble (SDF), insoluble (IDF), and total dietary fiber (TDF) in feed ingredients used in diets for pigs and poultry analyzed using Method AOAC 2011.25 are greater than values determined using Method AOAC 991.43. A second objective was to determine the variation that may exist among 3 laboratories using the 2 methods with the AnkomTDF Dietary Fiber Analyzer (Ankom Technology, Macedon, NY). The 3 laboratories were the ...

Critical evaluation of models for self-assembly of short and medium chain-length surfactants in aqueous solutions.

During numerous visits to our Laboratory professor Johannes (Hans) Lyklema emphasized the importance of a holistic view on thermodynamics. In order to fulfill this aim he assembled the monumental Fundamentals of Interface and Colloid Science series. The basic state functions (internal energy, enthalpy and free energies) are interrelated by Gibbs and Helmholtz relationships. First-order phase transitions are characterized by first-order state variables (temperature, pressure, entropy, volume). Interactions a...


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