bluuebunny/crossref_metadata_2025 huggingface dataset:
DeFi: data-driven characterisation of Uniswap v3 ecosystem & an ideal crypto law for liquidity pools
Authors: Miori Deborah , Cucuringu Mihai
Published: January 2023

Uniswap is a Constant Product Market Maker built around liquidity pools, where pairs of tokens are exchanged subject to a fee that is proportional to the size of transactions. At the time of writing, there exist more than 6,000 pools associated with Uniswap v3, implying that empirical investigations on the full ecosystem can easily become computationally expensive. Thus, we propose a systematic workflow to extract and analyse a meaningful but computationally tractable sub-universe of liquidity pools. Leveraging on the 34 pools found relevant for the six-months time window January-June 2022, we then investigate the related liquidity consumption behaviour of market participants. We propose to represent each liquidity taker by a suitably constructed transaction graph, which is a fully connected network where nodes are the liquidity taker’s executed transactions, and edges contain weights encoding the time elapsed between any two transactions. We extend the NLP-inspired graph2vec algorithm to the weighted undirected setting, and employ it to obtain an embedding of the set of graphs. This embedding allows us to extract seven clusters of liquidity takers, with equivalent behavioural patters and interpretable trading preferences. We conclude our work by testing for relationships between the characteristic mechanisms of each pool, i.e. liquidity provision, consumption, and price variation. We introduce a related ideal crypto law, inspired from the ideal gas law of thermodynamics, and demonstrate that pools adhering to this law are healthier trading venues in terms of sensitivity of liquidity and agents’ activity. Regulators and practitioners could benefit from our model by developing related pool health monitoring tools.
An assessment of the hydrochemical characteristics and nitrate human health risks of groundwater in a semi-arid plain: A case study of western Jilin Province
Authors: Zhang Linzuo , Liang Xiujuan , Xiao Changlai , Yang Weifei , Zhang Jiang , Wang Xinkang
Published: January 2023

Groundwater is important for human survival and development, particularly in arid and semi-arid regions, such as western Jilin Province. This study aimed to evaluate the hydrochemical characteristics and nitrate human health risks of groundwater in the semi-arid plains of western Jilin Province, northwest China. The study collected of 88 and 151 phreatic and confined water samples, respectively, which were analyzed for 13 water quality indicators using statistical and graphical methods. The Combined Weighted Water Quality Index (CWQI) based on the entropy weight, Criteria Importance Though Inter-criteria Correlation (CRITIC), the coefficient of difference method, and the water quality index (WQI) was used to evaluate the water quality of the study area. The human health risk assessment (HHRA) model was used to assess the risks of nitrate to the health of humans among different age groups. The results indicate that: (1) Groundwater in the study area is weakly alkaline and the main hydrochemical types of the phreatic and confined water were HCO3−·Ca-Mg and HCO3−-Na. (2) Rock weathering was the dominant processes responsible for groundwater ions, whereas groundwater hydrochemistry was also affected by silicate weathering and cation exchange. (3) Although the quality of groundwater was generally good, 9.1% of phreatic water samples failed drinking water standards. (4) The areas in which groundwater nitrate posed a higher risk to human health are mainly in the saline-alkali lands of Qian'an, Tongyu, and Zhenlai, with 15.9% of water samples exceeded the nitrate standard for children. This study can improve the understanding of groundwater hydrochemical characteristics and human health risks in the study area and can contribute to the study of groundwater in semi-arid regions.
Intermittent Fasting Improves Some Serum Proteins: a Study on Rats Model
Authors: Danladi Ceasar Dubor , Serakinci Nedime , Ivanovich Bozhkov Anatolii , Girich Mishel
Published: January 2023

Backgroud: There are approximately 100,000 proteins in humans with various physiological functions. The study of proteome in relation to calorie intake is expected to play an important role in solving major aging-associated problems in humans, such as obesity, diabetes, cardiovascular disease and cancer. Objective: To study the changes in serum proteins in young and old rats that were intermittently fasted. Method: 3 and 19 months old rats were intermittently fasted, Every 48 hours. The weights of both young and old rats were taken before feeding, while the young rats received 4g per 100g of body mass the adult rats received 1.75g per 100g of body mass for 14 days. Consecutively both young and old rats received a fattening ration of 25g feed ad lithium every 24 hours irrespective of age for 14 days. Throughout the experiment, animals were kept in individual cages with free access to water. Blood samples were collected after cervical dislocation. The blood serum was then analysed on SDS-PAGE electrophoresis. Results: Apolipoprotein A1 sharply increased in young rats during refeeding periods. Immunoglobulin light chains (lambda and kappa) levels increased during starvation in young rats. Apolipoprotein E levels in young animals was initially high during first cycle of starvation, Also In young animals alpha1-macroglobulin was observed to be high following starvation. In young animals apoA-4 increased during the first cycle of feeding. In young animals the levels of alpha1-antitrypsin flunctuated between the period of starvation and feeding, With higher levels been observed during starvation. In old rats after the first, Second intermittent fasting and second refeeding, Apo E, Apo A-4 and Apo A1 increased, While other serum proteins remained suppressed. Conclusion: The intermittent fasting in young and adult experimental animals, induced adaptive stress by upregulating and downregulating some serum proteins.
Combinatorial Generation of Planar Sets
Authors: Roussillon Tristan
Published: January 2023

We introduce a multi-dimensional generalization of the Euclidean algorithm and show how it is related to digital geometry and especially to the generation and recognition of digital planes. We show how to associate with the steps of the algorithm geometrical extensions of substitutions, i.e., rules that replace faces by unions of faces, to build finite sets called patterns. We examine several of their combinatorial, geometrical and topological properties. This work is a first step towards the incremental computation of patterns that locally fit a digital surface for the accurate approximation of tangent planes.
Designing a Resident Led Otolaryngology Clinic at a Community Health Center: An Initial Experience
Authors: Frank Ethan , Vuong Christopher , Lee Nathan H , Fujimoto Shannon O , Nguyen Khanh , Krishna Priya , Kwon Daniel I
Published: January 2023

Objectives: To report a resident-led otolaryngology clinic experience at an independent Federally Qualified Health Center (FQHC) with an affiliated academic center. We compared delivery of subspecialty care for underserved patients in a unique resident run clinic to standard care at the university staffed subspecialty clinics.
Methods: Retrospective cohort study of surgical patients seen at the Social Action Community Health System (SACHS) otolaryngology clinic over a one-year period compared with a matched control cohort of patients having similar procedures at the affiliated faculty academic practice. Measured endpoints were case type, time of referral to consultation, time interval between surgical decision and date of surgery, surgical complications, as well as post-surgical follow up.
Results: A total of 687 new patients were seen at SACHS clinic, with approximately 18% ultimately undergoing surgery. All otolaryngology sub-specialties were represented including otology, facial plastics, and head and neck oncology. SACHS patients had overall slightly higher median interval times from referral to consultation and from surgical decision to date of surgery though this did not reach significance. There were no differences in surgical outcomes or complication rates between the SACHS cohort and faculty cohort.
Conclusions: We demonstrate a mutually beneficial partnership between a fully resourced FQHC system and an otolaryngology residency program to provide reciprocally beneficial training experience and effective health care delivery.
Almost Universally Optimal Distributed Laplacian Solvers via Low-Congestion Shortcuts
Authors: Anagnostides Ioannis , Lenzen Christoph , Haeupler Bernhard , Zuzic Goran , Gouleakis Themis
Published: January 2023

In this paper, we refine the (almost) existentially optimal distributed Laplacian solver of Forster, Goranci, Liu, Peng, Sun, and Ye (FOCS `21) into an (almost) universally optimal distributed Laplacian solver. Specifically, when the topology is known (i.e., the Supported-CONGEST model), we show that any Laplacian system on an n-node graph with shortcut quality SQ(G) can be solved after no(1) SQ(G) log(1/ε) rounds, where ε > 0 is the required accuracy. This almost matches our lower bound that guarantees that any correct algorithm on G requires Ώ (SQ(G)) rounds, even for a crude solution with ε ≤ 1/2. Several important implications hold in the unknown-topology (i.e., standard CONGEST) case: for excluded-minor graphs we get an almost universally optimal algorithm that terminates in D · no(1) log(1/ε) rounds, where D is the hop-diameter of the network; as well as no(1) log (1/ε)-round algorithms for the case of SQ(G) ≤ no(1), which holds for most networks of interest. Moreover, following a recent line of work in distributed algorithms, we consider a hybrid communication model which enhances CONGEST with limited global power in the form of the node-capacitated clique (NCC) model. In this model, we show the existence of a Laplacian solver with round complexity no(1) log(1/ε). The unifying thread of these results, and our main technical contribution, is the development of near-optimal algorithms for a novel ρ-congested generalization of the standard part-wise aggregation problem, which could be of independent interest.
A Novel Minimally Invasive Fixation Method for Flail Chest Management in a Canine Model: An Animal Research
Authors: Li Shujun , Li Zhe , Zhu Weiwei , Zhang Bing , Zhang Yaxiao , Li Huixian , Lv Baolei , Zhen Qiang , Liu Lin , Liu Lijun , Wu Yanxin
Published: January 2023

Background: Multiple rib fractures can lead to flail chest with up to 35% mortality rate due to severe pulmonary complications. Current treatments of flail chest remain controversial. Studies have shown that surgical treatments can improve outcomes and reduce mortality, comparing to non-operative treatments. Current surgical fixation methods focus on stabilization of ribs on the outward facing side, and they require division of intercostal muscles. Damages to surrounding nerves and vessels may lead to chronic pain. This study tests a novel interior fixation method that minimizes neurovascular injuries.
Methods: Twelve healthy canines were divided in two surgical operation groups for exterior and interior fixation using titanium metal plates. Osteotomy with oblique fractures was prepared under general anesthesia. Exterior fixation was performed in open surgery. Interior fixation was minimally invasive using custom made tools including a flexible shaft extension screwdriver, solid plate stand, guiding wire loop and metal plates with threaded holes.
Results: Respiratory and cardiovascular functions (RR, PO2, PCO2, SpO2, and HR) together with body temperature were measured before anesthesia and within 48 hours after surgery. The difference in measurements was not statistically significant between the two groups before surgery with P values greater than 0.05. However, the interior group canines had better RR and PO2 values starting from the 24th hour, and better PCO2, SpO2, and HR values starting from the 48th hour. It took longer operation time to complete the minimally invasive interior fixation surgery (P value less than 0.001), but the total blood loss was less than the exterior fixation group (P value less than 0.001). Results also showed that interior group canines suffered less pain, and they had quicker recovery in gastrointestinal and physical mobility.
Conclusions: The investigative interior fixation method was safe and effective in rib stabilization on a canine rib fracture model, comparing to the exterior fixation method. The interior fixation was minimally invasive, with less damages to tissues and nerves surrounding the ribs, leading to better postoperative outcomes.
MAOA suppresses the growth of gastric cancer by interacting with NDRG1 and regulating the Warburg effect through the PI3K/AKT/mTOR pathway
Authors: Wang Yang-Yang , Zhou Yao-Qi , Xie Jia-Xuan , Wang Shu-Chang , Li Qing , Hu Li-Peng , Jiang Shu-Heng , Yi Shuang-Qin , Xu Jia , Cao Hui , Zhao Hao , Li Jun
Published: January 2023

Objective
Previous studies have indicated that neurotransmitters play important roles in the occurrence and development of gastric cancer. MAOA is an important catecholamine neurotransmitter-degrading enzyme involvedin the degradation of norepinephrine, epinephrine and serotonin. To find a potential therapeutic target for the treatment of gastric cancer, the biological functions of MAOA and the underlying mechanism in gastric cancer need to be explored.
Methods
The Cancer Genome Atlas(TCGA), Gene Expression Omnibus (GEO) datasets, Kaplan‒Meier (KM) plotter and Oncomine databases were used to identify the differentially expressed genes, which mainly involved the degradation and synthesis enzymes of neurotransmitters in gastric cancer. We also investigated the expression pattern of MAOA in human and mouse tissues and cell lines by immunohistochemistry and Western blottinganalysis. Western blotting, quantitative real-time PCR, enzyme-linked immunosorbent assay (ELISA) and a Seahorse experiment were used to identify the molecular mechanism ofcancer cell glycolysis. MAOA expression and patientsurvival were analysed in the Ren Ji cohort, and univariate and multivariate analyses were performed based on the clinicopathological characteristics of the above samples.
Results
MAOA expression was significantly downregulatedin gastric cancer tissue and associated with poor patient prognosis. Moreover, the expression level of MAOA in gastric cancer tissue had a close negative correlation with theSUXmax valueof PET-CT in patients. MAOA suppressed tumour growth and glycolysis and promoted cancer cell apoptosis. We also show that MAOA can interact with NDRG1 and regulate glycolysis through suppression of the PI3K/Akt/mTOR pathway. MAOA expression may serve as an independent prognostic factor in gastric cancer patients.
Conclusions
MAOA attenuated glycolysis and inhibitedthe progression of gastric cancer through the PI3K/Akt/mTOR pathway. Loss of function or downregulation of MAOA can facilitate gastric cancer progression. Overexpression of MAOA and inhibition of the PI3K/Akt/mTOR pathway may provide a potential method for gastric cancer treatment in clinicaltherapeutic regimens.
Effects of arsenic exposure on trace element levels in the hippocampus and cortex of rats and their gender differences
Authors: Yan Xi , Zhang Jun , Li Junyu , Zhang Xinglai , Wang Yi , Chen Xiaolu , Luo Peng , Hu Ting , Cao Xueshan , Zhuang Hongbin , Tang Xiaoxiao , Yao Fang , He Zhijun , Shen Liming
Published: January 2023

Arsenic (As) exposure is a major public health challenge worldwide. Much evidence suggests that As exposure can cause disturbances in trace element balance in the body. However, there are few reports on the effect of As on trace element levels in the central nervous system (CNS). We conducted an experiment to detect 19 elements in the hippocampus and cortex of arsenic-exposed rats by inductively coupled plasma mass spectrometry. The results showed that As levels in the hippocampus and cortex of arsenic-exposed rats were significantly higher than those in the control group, and As levels in the cortex were significantly higher than that in the hippocampus. In the hippocampus of arsenic-exposed group, the levels of Cd, Ho and Rb increased, while the levels of Au, Ba, Ce, Cs, Pd, Se, Sr and Tl decreased; In cortex, the levels of Cd and Rb increased, and the levels of Se and Au decreased. There were significant sex differences in the effects of As on Cd, Ba, Rb and Sr in the hippocampus and on Cd and Mo in the cortex. It is suggested that elemental imbalance may be a risk factor for the development of As toxicity and is closely associated with arsenic-induced CNS damage.
Development of a gas chromatography-mass spectrometry method for determination of β-propiolactone (BPL) residues in inactivated covid-19 vaccines
Authors: Mirjalili Seyedeh Zohreh , Tamiji Zahra , Shirangi Mehrnoosh , Amini Mohsen
Published: January 2023

β-propiolactone (BPL) is a common inactivator agent used in vaccines. Due to BPL carcinogenicity, complete hydrolysis of it is necessary to prevent cytotoxicity in mammalian cells. As a result, more attention should be paid to it at the clinic and it is important to measure its trace amounts. BPL analysis is challenging due to its instability. A simple and fast gas chromatography-mass spectrometry (GC-MS) method was developed for quantitation of residual BPL in inactivated covid-19 vaccines. Caprolactone was used as internal standard in samples solutions, the analysis was performed after extraction of analyte from vaccine media by ethyl acetate. The validity of the method was studied with a linearity of r2 > 0.99 over the concentration range of 0.2–20 µg/mL with the limit of detection and the limit of quantification of 0.68 and 2.06 µg/mL, respectively. The target analyte BPL was not detected in the samples, demonstrating the test samples were qualified. The established method can be used for quality control of inactivated covid-19 vaccines.
Composition of mucus- and digesta-associated bacteria in growing pigs with and without diarrhea differed according to the presence of colonic inflammation
Authors: Panah Farhad M. , Lauridsen Charlotte , Højberg Ole , Elvang Henrik , Nielsen Tina Skau
Published: January 2023

Background
In the pig production, diarrhea can occur during different growth stages including the period 4–16 weeks post weaning, during which diarrhea a diarrheal outbreak also termed as colitis-complex diarrhea (CCD) can occur and it is distinct from post-weaning diarrhea (1–2 weeks post weaning). We hypothesized that CCD in growing pigs is associated with changes in colonic microbiota composition and fermentation patterns, and the aim of the present observational study was to identify changes in digesta-associated bacteria (DAB) and mucus-associated bacteria (MAB) in the colon of growing pigs with and without diarrhea. A total of 30 pigs (8–12 weeks of age) were selected; 20 showed clinical signs of diarrhea and 10 appeared healthy. Based on histological examination of colonic tissue, 21 pigs were selected for further studies and classified as follows: without diarrhea, no colon inflammation (NoDiar; n = 5), with diarrhea, without inflammation (DiarNoInfl; n = 4), and with diarrhea, with inflammation (DiarInfl; n = 12). Composition (16S rRNA gene amplicon sequencing) and fermentation pattern (SCFA profile) of the DAB and MAB communities were characterized.
Results
The DAB showed higher alpha diversity compared to MAB in all pigs, and both DAB and MAB showed lowest alpha diversity in the DiarNoInfl group. Beta diversity was significantly different between DAB and MAB as well as between diarrheal groups in both DAB and MAB. Compared to NoDiar, DiarInfl showed increased abundance of various taxa, incl. certain pathogens, in both digesta and mucus, as well as decreased digesta butyrate concentration. However, DiarNoInfl showed reduced number of genera compared to NoDiar, but still lower butyrate concentration.
Conclusion
Diversity and composition of MAB and DAB changed in diarrheal groups dpending on presence/absence of colonic inflammation. We also suggestion that DiarNoInfl group was at the earlier stage of diarrhea compared with DiarInfl and may as well highlight the overall importance of butyrate in relation to gut health. In conclusion, we confirmed that changes in DAB and MAB were associated with CCD and reduced butyrate concentration in digesta. Moreover, DAB might suffice for future community-based studies of CCD.
Promising conilon coffee trees clones for agroforestry and intercropping systems
Authors: Senra João Felipe de Brites , Silva Josimar Aleixo da , Esposti Marlon Dutra Degli , Dan Maurício Lima , Zacarias Alex Justino , Conceição Amanda Oliveira , Milheiros Idalina Sturião , Silva Uliana Ribeiro
Published: January 2023

This research aimed to select conilon coffee tree clones (Coffea canephora Pierre ex A.Froehner) for agroforestry and/or intercropping systems. The experiment was carried out at Bananal do Norte Experimental Farm (20º45' S and 41º17' W), Espírito Santo, Brazil. The clones were evaluated in an agroforestry system with “urograndis” hybrid eucalyptus trees (Eucalyptus grandis W.Hill × E. urophylla S.T.Blake) plus prata-type banana herbs (Musa spp.) and an intercropping with ‘Bahia’ sweet orange trees (Citrus sinensis (L.) Osbeck). An augmented block experiment design, with two plants per plot, four controls, in six blocks in the agroforestry system and four in the intercropping, was adopted. Thirteen morphophysiological characteristics were evaluated. Data analysis was performed using the restricted maximum likelihood method and best linear unbiased prediction and the significance of genetic effects by the likelihood ratio test. To select superior clones the Mulamba-Rank index was performed. Twenty clones were selected for the agroforestry and 20 for the intercropped system. The clones 16, 17, 35, 43, 48, 61, 64, 68 and T3 were the most promising for both systems. There is genetic variability to be explored among the clones, being possible the development of varieties, in the future, for agroforestry and intercropping systems.
Thoracoscopic Treatment of Mediastinal Ectopic Parathyroid Adenomas: a Case Series and Literature Review
Authors: Chavez Karla Veronica , Chavez-Tostado Mariana , Bolaños-Morales Francina Valezka , Lopez-Alamillo Susana
Published: January 2023

Purpose: hyperparathyroidism (HPT) is a disease caused by hypersecretion of one or more parathyroid glands, it can be associated with ectopic mediastinal parathyroid glands (MEPA) in 2% of cases. The use of video-assisted thoracoscopic surgery (VATS) for the surgical resection of these glands is a safe, cost-effective, and low morbidity option for patients with MEPA. We report a case series of patients with this disease managed with VATS.
Methods: From 2008 to 2022, a retrospective study involving patients with MEPA and treated by VATS approach was performed in a tertiary hospital in Mexico city. Relevant biochemical and clinical variables such as imaging studies, pre and postoperative lab results, surgical strategy and outcomes and pathological analysis were analyzed.
Results: Four cases of mediastinal parathyroid adenomas causing HPT were included. All patients were female with a median age of 52.5 years-old (range 46-59 years), half of the patients had primary HPT and the others tertiary HPT after kidney transplant. 75% of cases had a MEPA in the medium mediastinum, and all had a preoperative positive SPECT-CT 99mTc Sestamibi scan. Mean preoperative PTH was 621.3pg/mL (182-1382pg/mL). All patients successfully underwent parathyroidectomy with a VATS approach, no deaths were reported.
Conclusions: VATS is a minimally invasive surgery that provides adequate access to mediastinal located glands, optimal visualization of mediastinal structures and has a high resection success rate with less complications and morbidity than open approaches.
Amine-decorated zirconium-based metal-organic framework for ultrafast detection of 2, 4, 6-trinitrophenol in aqueous medium
Authors: Verma Rajpal , Dhingra Gaurav , Kaur Manpreet , Garg Deepika , Mohiuddin Irshad , Malik Ashok
Published: January 2023

An amine-decorated zirconium-based metal–organic framework (MOF, coded as UiO-66-NH2) with rod shaped morphology has been solvothermally synthesized using low-cost and easily available 2-aminoterephthalic acid as an organic linker. The crystallinity of the synthesized MOF material has been confirmed by sharp PXRD diffraction pattern. Photoluminescent studies showed that the UiO-66-NH2 features a strong fluorescent behaviour when dispersed in water, which could be used as a highly selective and sensitive sensor for detection of trace amount of 2,4,6-trinitrophenol (TNP), even in coexistence with other potentially competitive nitroaromatic analytes. High value of Stern-Volmer quenching constant Ksv (1.106 x 105 M-1), photoluminescent quenching efficiency (97.8%) and lower detection limit (0.95 μM/217ng mL-1) ascertained extraordinary sensitivity of developed UiO-66-NH2 for TNP. Density functional theory (DFT) calculations and electrostatic interactions (i.e. ionic interaction, H-bonding and π-π interaction) indicated that electron and energy transfer processes play a key role in the turn-off quenching response of UiO-66-NH2 sensor towards TNP.
What is expected for China’s SARS-CoV-2 epidemic?
Authors: HERNANDEZ-SUAREZ CARLOS , Murillo-Zamora Efrén
Published: January 2023

Recently, China announced that its “zero-covid’ policy would end, which will bring serious challenges to the country’s health system. In here we provide simple calculations that allows us to provide an estimate of what is expected as an outcome in terms of fatalities, using the fact that it is a highly contagious disease that will expose most of a highly vaccinated population to the virus. We use recent findings regarding the amount of reduction in the risk of severe outcome achieved by vaccination and arrive to an estimate of 1.1 m deaths, 60% of these are males. In our model, 84% percent of deaths occur in individuals with age 55 years or older. In a scenario in which this protection is completely lost due to waning and the infection fatality rate of the prevalent strain reaches similar levels to the observed in the beginning of the epidemic, the death toll could reach 2.4 m, 93% in 55 years or older.
Effect of Plasma Liquid on Colloidal (CoNPs) and (PtNPs) Nanostructures Produced by Laser Ablation Technique for Antibacterial Applications
Authors: Khamees Entidhar Jasim , Azeez Halah Mohammed , Hussein Ahmed Shaker , Ahmed Rafea T. , Gençyılmaz Olcay
Published: January 2023

In this work, the biological and physical properties of colloidal platinum (PtNPs) and cobalt (CoNPs) nanoparticles were examined for antibacterial applications. The colladial PtNPs and CoNPs nanoparticles were produced using two different liquids (double-distilled water (DDDW) and Dulbecco’s Modified Eagle’s Medium (DMEM)) by laser ablation technique (PLAL). Characterization techniques such as transmission electron microscopy (TEM), UV-vis spectroscopy and Fourier transform infrared (FTIR) were used to determine some physical properties of PtNPs and CoNPs. The antibacterial effects ofcolladial PtNPs and CoNPs at different doses on various bacteria were investigated and their antibacterial activity resistances were calculated by measuring the inhibition zone widths. The effect of the liquid used in the production, the type of bacteria and dose amounts on the antibacterial resistance of these nanoparticles were determined. In this study, it has been shown that the liquid used in the production of PtNPs and CoNPs can create significant changes in the physical and antibacterial properties of nanoparticles, especially by changing the size and concentration of collodial PtNPs.
Die Hochlagenflora des Schwarzwaldes und seiner Nachbargebiete. Liste der in Schwarzwald, Vogesen, Nord-Jura und Schwäbischer Alb oberhalb 1000 m nachgewiesenen Farn- und Samenpflanzen
Authors: Hügin Gerold
Published: January 2023

Alle Farn- und Samenpflanzen, die in den Mittelgebirgen Schwarzwald, Vogesen, Nord-Jura und Schwäbische Alb oberhalb 1000 m Höhe nachgewiesen sind, werden aufgelistet; zusätzlich wird die Höhenstufe zwischen 900 und 1000 m berücksichtigt. Die Liste enthält zahlreiche Neufunde, vor allem bestimmungskritischer Taxa, und beinhaltet Angaben zum Indigenat; sie kann als Grundlage dienen zur Bewertung von Farn- und Samenpflanzen als Zeiger der Temperaturverhältnisse.
Taxonomische und nomenklatorische Neuigkeiten zur Flora Deutschlands 1
Authors: Hand Ralf , Buttler Karl Peter
Published: January 2023

Wie bereits in der Vorgängerreihe werden die Besprechungen taxonomischer Veröffentlichungen in zwei Kategorien aufgeteilt: ausführliche Darstellungen und Kurzreferate. Die erste Kategorie konzentriert sich auf solche Publikationen, die für die angewandte Taxonomie relevante Merkmale berücksichtigen, somit – wenigstens zum Teil – anhand von Methoden erarbeitet wurden, welche gemeinhin als die klassischen gelten. Der praxisorientierte Bezug zur Floristik soll somit betont werden. Die zweite Kategorie betrifft in erster Linie molekular-phylogenetische Untersuchungen, die seit rund zehn Jahren stark zugenommen haben, zumeist aber auf kleinen Stichproben beruhen und in denen meist nicht der Versuch unternommen wird, traditionelle Methoden vergleichend einzubeziehen. Diese Kurzreferate werden in die Rubrik „molekulare Phylogenetik“ aufgenommen, wenn taxonomische Änderungen zu erwarten sind und die Ergebnisse daher nicht übergangen werden können.
Schriftenschau
Authors: Hand Ralf , Nawrath Stefan , Gregor Thomas , Horn Karsten , Ristow Michael , Scholz Hildemar , Matzke-Hajek Günter
Published: January 2023

Schriftenschau
Dryopteris ×alpirsbachensis, hybr. nov. – erster Nachweis der Naturhybride zwischen Dryopteris carthusiana und Dryopteris remota (Dryopteridaceae, Pteridophyta)
Authors: Freigang Jens , Zenner Günther , Bujnoch Walter , Jessen Stefan , Magauer Marianne
Published: January 2023

Die Hybride zwischen Dryopteris carthusiana und D. remota wird beschrieben als D. ×alpirsbachensis Freigang, Zenner, Bujnoch, S. Jess. & Magauer. Sie wurde in Deutschland, Österreich, Frankreich und Italien gefunden. Die intermediären morphologischen Eigenschaften, überwiegend abortierte Sporen, die Ergebnisse karyologischer Untersuchungen sowie der Analyse eines Fragmentes des nukleären PgiC-Gens bestätigen die vermutete Abstammung. Weiterhin wird sie mit der ähnlichen D. ×brathaica (D. carthusiana × D. filix-mas) verglichen.
Chromosomenzahlen von Farn- und Samenpflanzen aus Deutschland 10
Authors: Gregor Thomas , Hand Ralf , Paule Juraj
Published: January 2023

Ab dieser Folge werden neben Chromosomenzählungen auch durchflusszytometrische Ploidiebestimmungen publiziert.
Beitrag zur Kenntnis der Brombeeren (Gattung Rubus L., Rosaceae) in Hessen und angrenzenden Gebieten
Authors: Jansen Werner
Published: January 2023

Es werden vier neue Brombeerarten des Subgenus Rubus aus Hessen beschrieben: R. acroglotta W. Jansen (Ser. Pallidi), R. pseudohostilis W. Jansen (Ser. Hystrix), R. cyanophyllus W. Jansen & H. Grossh. (Ser. Micantes), nachgewiesen auch im benachbarten Baden-Württemberg, und aus der Sektion Corylifolii R. durospinosus W. Jansen (Ser. Sepincola). Die drei Arten der Sektion Rubus sind (Weber 1977, 2002 folgend) Regionalsippen mit einem Arealdurchmesser von 50–250 km, während R. durospinosus ein – noch nicht vollständig bekanntes – größeres Verbreitungsgebiet besiedelt, das sich vom Taunus über Vogelsberg und Rhön bis Bayern und ins westliche Thüringen erstreckt. Die Arten werden durch Abbildungen von Herbarbelegen illustriert, ihre Verbreitung wird durch Rasterkarten dargestellt.
Amelanchier ovalis s. l. – zwei Zytotypen in Deutschland
Authors: Gregor Thomas , Bauer Johann , Engelhardt Martin , Hand Ralf , Hein Hermann , Lippert Wolfgang , Mayer Anton , Meierott Lenz , Parker Heinz , Paule Juraj
Published: January 2023

In Deutschland war bisher nur das Vorkommen tetraploider Amelanchier ovalis (2n = 68) im Mittelgebirgsraum bekannt. Mit Hilfe durchflusszytometrischer Ploidiebestimmungen konnte dies bestätigt werden. Im Alpenraum wurden zusätzlich diploide Pflanzen nachgewiesen, die dort auch den Hauptanteil stellen. Tetraploide Pflanzen wurden im Alpenvorland und im Ammergebirge sowie in Tirol am Fernpass und im Wettersteingebirge gefunden.
Beiträge zur Fortschreibung der Florenliste Deutschlands (Pteridophyta, Spermatophyta) – Zehnte Folge
Authors: Buttler Karl Peter , Hand Ralf
Published: January 2023

In dem Beitrag sind weitere Nachträge und Korrekturen zur 2008 veröffentlichten "Liste der Gefäßpflanzen Deutschlands" zusammengestellt und kommentiert. Neun Taxa müssen der Liste hinzugefügt werden, fünf Taxa müssen gestrichen werden.
Schriftenschau
Authors: Hand Ralf , Lippert Wolfgang , Engelhardt Martin , Raab-Straube Eckhard von , Rätzel Stefan
Published: January 2023

Schriftenschau
Anmerkungen zur Nees-Braunwurz (Scrophularia neesii Wirtg.)
Authors: Hand Ralf
Published: January 2023

Es wird ein Überblick zum Kenntnisstand über Scrophularia neesii im Vergleich mit S. umbrosa s. str. (Scrophulariaceae) gegeben, darunter zu Unterscheidungsmerkmalen, der Chorologie und der Karyologie. Für S. ehrhartii var. crenata, ein Synonym der Nees-Braunwurz, wird ein Lektotyp vorgeschlagen. Wenngleich noch einzelne Fragen offen sind, wird dafür plädiert S. neesii und S. umbrosa s. str. im Artrang zu akzeptieren.
Vielfalt aus aller Welt – neophytische Typha-Arten in Mitteleuropa
Authors: Bernhardt Karl-Georg , Gregor Thomas
Published: January 2023

Weitgehend unbemerkt haben sich neophytische Typha-Arten in Mitteleuropa angesiedelt. Getrieben wird diese Entwicklung durch den Gartenhandel, der diese Typha-Sippen für die vielerorts angelegten Teiche und Biotope zur Verfügung stellt. Bestimmungsmerkmale der neophytischen Typha-Arten werden dargestellt, um die Sensibilität bei der Verwendung von Typha-Arten bei Pflanzungen zu erhöhen.
Hieracium-Sammlung im Marburger Universitätsherbarium (MB) – Ergebnisse einer Revision
Authors: Gottschlich Günter
Published: January 2023

779 Hieracium-Belege aus dem Herbarium der Philipps-Universität Marburg (MB), Deutschland, wurden revidiert. Nahezu alle Belege stammen aus dem 19. Jahrhundert, die Mehrzahl wurde zwischen 1830 und 1880 gesammelt. Aus Hessen stammen nur 35 Belege. Für die Sammlung konnten 172 Sammler ermittelt werden. Die Sammler Gustav Sennholz, Willibald Lechler und Heinrich Wilhelm Friedrich Kloos werden ausführlich besprochen. 8 Syntypen wurden eruiert und werden aufgelistet. Die Taxonomiegeschichte von H. scabricaule wird aufgerollt und H. scabricaule neotypisiert.
Hieracium mirabile – ein taxonomisches Mirakel
Authors: Gottschlich Günter
Published: January 2023

Die Geschichte der wechselvollen taxonomischen Zuordnung und Umgrenzung von Hieracium mirabile wird dargelegt. Als Ergebnis einer neuerlichen Autopsie des Typus wird die zwischenzeitlich vorgenommene Einziehung der Art und Synonymisierung mit P. fusca rückgängig gemacht und die Art in die Gattung Pilosella versetzt. In die Untersuchung einbezogen werden auch die früher in H. mirabile einbezogenen Taxa H. latisquamiforme und H. mirabile subsp. pseudomirabile, die zwischenzeitlich als P. latisquamiformis und P. pseudomirabilis klassifiziert wurden. H. latisquamiforme wird als Synonym zu P. stoloniflora, H. mirabile subsp. pseudomirabile als Synonym zu P. aurantiaca subsp. auropurpurea gezogen.
Erneute Klarstellung: Rosa dumalis und nicht Rosa vosagiaca ist der korrekte Name für die Blaugrüne Rose (Vogesen-Rose)
Authors: Reichert Hans
Published: January 2023

Die Illegitimität des Namens Rosa vosagiaca wird anhand der Literaturquellen nachgewiesen. Im Gegensatz zur Auffassung von Bakker & al. (2019) findet der Verfasser im Protolog zu Rosa dumalis Bechstein 1810 nichts, was gegen die im festländischen Europa derzeit übliche Verwendung dieses Namens für die Blaugrüne Rose spricht. Auch an dem von Loos (1996) gewählten Neotypus ist nichts zu bemängeln. Gegen die Anwendung des Namens R. dumalis auf Hybriden durch Graham & Primavesi (1993) und Bakker & al. (2019) gibt es hingegen mehrere Einwände.
Chromosomenzahlen von Farn- und Samenpflanzen aus Deutschland 14
Authors: Gregor Thomas , Paule Juraj
Published: January 2023

Angegeben wird jeweils das Sammeldatum des für die Chromosomenzählung verwendeten Materials (Lebendpflanze, Samen) zuzüglich eines eventuell gesammelten Beleges sowie – getrennt durch einen Schrägstrich – Sammeldatum und Aufbewahrungsort eines Beleges der gezählten Pflanze.
Zytologische und genetische Untersuchungen zu Viola epipsila, V. palustris und ihrer Hybride V. ×fennica
Authors: Smolka Alisia , Rätzel Stefan , Herklotz Veit , Ritz Christiane M.
Published: January 2023

Arten der Gattung Viola sind aufgrund ihrer großen morphologischen Variationsbreite und komplexer Hybridisierungs- und Polyploidisierungsereignisse oft nicht einfach bestimmbar. Die beiden Arten V. palustris und V. epipsila und deren Hybride V. ×fennica wurden darum mithilfe von Durchflusszytometrie, mikroskopischer Chromosomenzählung und der Sequenzierung eines Plastidenmarkers untersucht, um ihre Verwandtschaftsverhältnisse zu klären und die verschiedenen Zytotypen mit morphologischen Merkmalen zu vergleichen. Die vorherige Bestimmung nach morphologischen Merkmalen konnte in allen Fällen durch die zytologische Analyse bestätigt werden, was die verwendeten Unterscheidungsmerkmale verifiziert. Es wurden Chromosomenzahlen von 2n = 24 für V. epipsila, 2n = 48 für V. palustris und 2n = 36 für die Hybride V. ×fennica ermittelt, was bereits existierende Literaturangaben bestätigt. Plastidsequenzenanalysen ergaben V. epipsila als mütterlichen Elter für alle V. ×fennica-Akzessionen, während V. palustris subsp. pubifolia mithilfe der hier angewandten Methoden nicht von V. palustris zu unterscheiden war. Aufgrund unserer Untersuchungen konnten der Wiederfund von V. epipsila und der erste Nachweis von V. ×fennica für Brandenburg erbracht werden. Die hier beschriebenen Methoden können zur eindeutigen Unterscheidung der untersuchten Taxa aus der Verwandtschaft von V. palustris verwendet werden und somit auch zum gezielten Schutz der in Deutschland extrem seltenen und akut vom Aussterben bedrohten V. epipsila sowie der ebenfalls sehr seltenen Hybride beitragen.
Ranunculus-auricomus-Komplex (Ranunculaceae) in Sachsen
Authors: Dunkel Franz Georg
Published: January 2023

Anhand umfangreicher Feld- und Herbarstudien können in Sachsen 35 Arten aus dem Ranunculus-auricomus-Komplex unterschieden werden. R. argoviensis, R. hevellus, R. homophyllus, R. monacensis, R. phragmiteti, R. suborbicularis und R. vertumnalis können für Sachsen bestätigt werden oder sind neu für Sachsen. 28 Arten sind bislang unbekannt und werden hier neu beschrieben und abgebildet. Schwerpunkte der Verbreitung sind die Leipziger Bucht und die östliche Oberlausitz. Die meisten der Arten sind gefährdet bis stark gefährdet, viele historische Nachweise konnten nicht mehr bestätigt werden. Nach Abgrenzung der Taxa sollte der R.-auricomus-Komplex naturschutzfachlich deutlich stärker im Fokus stehen.
Geschichte des Brocken-Habichtskrauts (Hieracium nigrescens subsp. bructerum (Fr.) Zahn)
Authors: Gottschlich Günter
Published: January 2023

Die bis auf Johannes Thal und seine "Sylva Hercynia" (1588) zurückreichende Geschichte des Brocken-Habichtskrauts (Hieracium nigrescens subsp. bructerum) und ihr Niederschlag in vor- und nachlinnéischer Literatur sowie in Herbarien wird rekonstruiert. Der derzeit akzeptierte Name wird neotypisiert. Kulturgeschichtliche Aspekte im Zusammenhang mit dem Brockentourismus und den Besonderheiten der subalpinen Brockenflora werden nachgezeichnet. Abschließend wird auf Gefährdungen und Schutzmaßnahmen eingegangen.
Zitierhygiene 1: „A. Br.“ Addison Brown und Alexander Braun als Autoren wissenschaftlicher Pflanzennamen
Authors: Raus Thomas
Published: January 2023

Die Autorbezeichnung „A. Br.“ kodiert nach dem empfohlenen internationalen Standard des Autorenlexikons von Brummitt & Powell (Authors of Plant Names, Kew 1992) den amerikanischen Botaniker Addison Brown (1830–1913). Sie wird jedoch traditionell in hohem Maße unklar und verwirrend verwendet für Taxa, die der nahezu zeitgleich wirkende Deutsche Alexander Braun (1805–1877) aufgestellt hat. Durch unkritisch in Datenbanksysteme importierte Datensätze werden viele Namen infolgedessen als scheinbare Homonyme dieser beiden Autoren verwaltet. Alle von Alexander Braun beschriebenen Taxa sollten deshalb konsequent mit dem Standardkürzel „A. Braun“ versehen sein und nur mit diesem in Datenbanken eingepflegt werden.
Taxonomische und nomenklatorische Neuigkeiten zur Flora Deutschlands 2
Authors: Buttler Karl Peter , Hand Ralf
Published: January 2023

Die Intention der hiermit fortgesetzten Reihe sowie die Kriterien zur Aufnahme der besprochenen Literatur sowie der nomenklatorischen Neuigkeiten sind in der Einführung der Vorjahresfolge in Kochia erläutert.
Ranunculus pseudocassubicus (Christ ex Schinz & R. Keller) W. Koch – nun doch in Deutschland
Authors: Dunkel Franz Georg
Published: January 2023

Ein bereits 1965 entdecktes Vorkommen eines Gold-Hahnenfusses am Oberrhein bei Breisach aus der Subsektion Cassubici konnte erneut nachgewiesen werden und wurde als R. pseudocassubicus bestimmt. Die Unterscheidungsmerkmale zu R. cassubicifolius liegen vor allem im Blütenbereich (Verhältnis Staubblatt/Griffelköpfchen) und im Grundblattzyklus. Der einzige deutsche Wuchsort in einem ehemaligen Hartholz-Auenwald ist durch Seltenheit und Sukzession gefährdet.
Ein wenig beachtetes Merkmal von Epilobium lamyi F. W. Schultz
Authors: Bomble F. Wolfgang
Published: January 2023

Als bisher wenig beachtetes Merkmal zur Unterscheidung von Epilobium lamyi und E. tetragonum L. s. str. wird die Papillenform der Samenoberfläche vorgestellt.
Chromosomenzahlen von Farn- und Samenpflanzen aus Deutschland 3
Authors: Gregor Thomas , Hand Ralf
Published: January 2023

Angegeben wird jeweils das Sammeldatum des für die Chromosomenzählung verwendeten Materials (Lebendpflanze, Samen) zuzüglich eines eventuell gesammelten Beleges sowie – getrennt durch einen Schrägstrich – Sammeldatum und Aufbewahrungsort eines Beleges der gezählten Pflanze.
Beiträge zur Fortschreibung der Florenliste Deutschlands (Pteridophyta, Spermatophyta) – Zweite Folge
Authors: Buttler Karl Peter , Hand Ralf
Published: January 2023

In der zeitgleich vorgelegten neuen "Liste der Gefäßplanzen Deutschlands" sind mehrere nomenklatorische und taxonomische Neuerungen enthalten. Die Hintergründe werden bei folgenden Taxa ausführlicher diskutiert: Anthoxanthum, Knautia, Phyteuma, Primula auricula, Rosa gremlii und Valeriana-officinalis-Gruppe. Typisierungen erfolgen bei Anthoxanthum nipponicum, Knautia gracilis, Rosa gremlii sowie mehreren ihrer infraspezifischen Sippen. Die folgenden Neukombinationen werden gebildet: Elymus junceiformis, Valeriana pratensis subsp. angustifolia, V. pratensis subsp. stolonifera, V. excelsa subsp. versifolia.
Gattung Alchemilla im Französischen und Schweizer Jura
Authors: Hügin Gerold , Fröhner Sigurd Erich , Purschke Christoph
Published: January 2023

In Karten wird die Verbreitung von 49 Alchemilla-Arten im Französischen und Schweizer Jura dargestellt. A. psilopodia wird als Art neu beschrieben. Mehrere Erstnachweise werden erbracht: Neu sind A. oscensis für Mitteleuropa, A. hybrida für die Schweiz, A. jaquetiana für Frankreich, A. firma, A. propinqua, A. speciosa, A. squarrosula für den Jura. Die aus Südwesteuropa einstrahlenden Arten (A. hybrida, A. oscensis, A. vetteri) werden ausführlich beschrieben und in Abbildungen, Bestimmungs- und Merkmalstabellen mit ähnlichen Arten verglichen (A. colorata, A. exigua, A. filicaulis, A. glaucescens, A. monticola, A. plicata, A. propinqua, A. psilopodia, A. strigosula, A. subglobosa).
Ranunculus chrysoleptos Brodtb. & Dunkel (Ranunculaceae) – eine neue Art aus dem Ranunculus-auricomus-Komplex
Authors: Dunkel Franz Georg
Published: January 2023

Ranunculus chrysoleptos BRODTB. & DUNKEL wird beschrieben und abgebildet. Die Hauptverbreitung der Art liegt in der Oberrheinischen Tiefebene um Karlsruhe.
Typisierungen in der Potentilla-collina-Gruppe (Potentilla subgrex Collinae Th. Wolf)
Authors: Gregor Thomas
Published: January 2023

Soweit bisher noch nicht geschehen, werden für Sippen der Potentilla-collina-Gruppe mit Zackenhaaren, die mutmaßlich aus Kreuzungen zwischen P. argentea L. und P. incana G. Gaertn., B. Mey. & Scherb. hervorgegangen sind, und für mit der P.-collina- Gruppe in Verbindung gebrachte Sippen Lecto- oder Neotypen ausgewählt.
Arten aus dem Ranunculus-auricomus-Komplex (Ranunculaceae) in Deutschland
Authors: Dunkel Franz Georg
Published: January 2023

Fünf neue Arten aus dem Ranunculus-auricomus-Komplex in Deutschland werden beschrieben und abgebildet. R. pleiophyllus ist weiter verbreitet und bislang aus Rheinland-Pfalz, Baden-Württemberg, Bayern, Saarland und Mecklenburg-Vorpommern nachgewiesen. Die übrigen neuen Arten besitzen – soweit bis jetzt bekannt – kleine Areale: R. excisus in Rheinland-Pfalz, R. vertumnaliformis in Mecklenburg-Vorpommern, R. biclaterae in Nordbayern und R. ferocior in Mecklenburg-Vorpommern und Nordbayern.
Beiträge zur Fortschreibung der Florenliste Deutschlands (Pteridophyta, Spermatophyta) – Fünfte Folge
Authors: Hand Ralf , Buttler Karl Peter
Published: January 2023

In dem Beitrag sind weitere Nachträge und Korrekturen zur 2008 veröffentlichten "Liste der Gefäßpflanzen Deutschlands" zusammengestellt und kommentiert. 17 Taxa, darunter 9 eingebürgerte Neophyten, müssen der Liste hinzugefügt, 2 Taxa müssen gestrichen werden.
Identität von Festuca duvalii
Authors: Korneck Dieter , Gregor Thomas , Paule Juraj
Published: January 2023

Für Festuca ovina subsp. sulcata var. duvalii St.-Yves wird ein Beleg aus dem Herbarium Genf als Lectotypus ausgewählt. Wir plädieren dafür, die Anwendung des Namens F. duvalii (St.-Yves) Stohr auf tetraploide Felspflanzen des pfälzisch-rheinhessischen Hügellandes sowie der Trockengebiete bei Rouffach und bei Schweinfurt zu beschränken. Morphologie, Ploidiestufen und Verbreitung werden dargestellt.
Schriftenschau
Authors: Wörz Arno , Gregor Thomas , Caspari Steffen , Raus Thomas , Meierott Lenz , Amarell Uwe , Reichert Hans , Hohla Michael , Hand Ralf , Kasperek Gerwin , Poppendieck Hans-Helmut
Published: January 2023

Schriftenschau