Thematische Bibliographien / Chemo taxonomy

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Auswahl der wissenschaftlichen Literatur zum Thema „Chemo taxonomy“

Autor: Grafiati

Veröffentlicht am 18. Mai 2024

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Zeitschriftenartikel zum Thema "Chemo taxonomy"

Auling, Georg, Andreas Probst und Reiner M. Kroppenstedt. „Chemo- and Molecular Taxonomy of D(−)-Tartrate-Utilizing Pseudomonads“. Systematic and Applied Microbiology 8, Nr. 1-2 (Juli 1986): 114–20. http://dx.doi.org/10.1016/s0723-2020(86)80158-8.

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Guillem, R. M., F. P. Drijfhout und S. J. Martin. „Using chemo-taxonomy of host ants to help conserve the large blue butterfly“. Biological Conservation 148, Nr. 1 (April 2012): 39–43. http://dx.doi.org/10.1016/j.biocon.2012.01.066.

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Delgado-Tiburcio, Eugenia Elisa, Jorge Cadena-Iñiguez, Edelmiro Santiago-Osorio, Lucero del Mar Ruiz-Posadas, Israel Castillo-Juárez, Itzen Aguiñiga-Sánchez und Marcos Soto-Hernández. „Pharmacokinetics and Biological Activity of Cucurbitacins“. Pharmaceuticals 15, Nr. 11 (26.10.2022): 1325. http://dx.doi.org/10.3390/ph15111325.

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Cucurbitacins are a class of secondary metabolites initially isolated from the Cucurbitaceae family. They are important for their analgesic, anti-inflammatory, antimicrobial, antiviral, and anticancer biological actions. This review addresses pharmacokinetic parameters recently reported, including absorption, metabolism, distribution, and elimination phases of cucurbitacins. It includes recent studies of the molecular mechanisms of the biological activity of the most studied cucurbitacins and some derivatives, especially their anticancer capacity, to propose the integration of the pharmacokinetic profiles of cucurbitacins and the possibilities of their use. The main botanical genera and species of American origin that have been studied, and others whose chemo taxonomy makes them essential sources for the extraction of these metabolites, are summarized.

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Guillem, R. M. „Corrigendum to “Using chemo-taxonomy of host ants to help conserve the large blue butterfly” [Biol. Conserv. 148 (2012) 39–43]“. Biological Conservation 152 (August 2012): 297. http://dx.doi.org/10.1016/j.biocon.2012.03.033.

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Ewas, Mohamed. „SYSTEMATIC REVISION OF CAPPARIS SPINOSA L. VAR. (CANESCENS, DESERTI, INERMIS), THE ENDEMIC VARIETIES AMONG EGYPTIAN FLORA BASED ON MOLECULAR AND CHEMO-TAXONOMY“. Egyptian Journal of Desert Research 73, Nr. 1 (01.06.2023): 131–56. http://dx.doi.org/10.21608/ejdr.2023.207924.1141.

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Yang, Yong, Heng-Lin Cui, Pei-Jin Zhou und Shuang-Jiang Liu. „Halobacterium jilantaiense sp. nov., a halophilic archaeon isolated from a saline lake in Inner Mongolia, China“. International Journal of Systematic and Evolutionary Microbiology 56, Nr. 10 (01.10.2006): 2353–55. http://dx.doi.org/10.1099/ijs.0.64437-0.

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A novel halophilic archaeon, NG4T, was isolated from Jilantai salt lake in Inner Mongolia, China. The taxonomy of strain NG4T was studied by polyphasic methods. Strain NG4T grew at pH 5.5–8.5 and at a temperature of 22–55 °C. It was chemo-organotrophic, aerobic and required concentrations of 2.7–5.2 M NaCl and 0.05–0.3 M Mg2+ for growth. Cells were Gram-negative, slender rods. Colonies on agar plates containing 25 % (w/v) total salts were red, elevated and round. According to 16S rRNA gene sequence similarity, strain NG4T was phylogenetically related to Halobacterium salinarum DSM 3754T (98.2 %) and Halobacterium noricense A1T (97.3 %). The DNA G+C content was 64.2 mol%. DNA–DNA relatedness values with Hbt. salinarum DSM 3754T and Hbt. noricense A1T were 47 and 35 %, respectively. The polar lipids of strain NG4T consisted of phosphatidylglycerol, methylated phosphatidylglycerol phosphate, phosphatidylglycerol sulfate, triglycosyl diether, sulfated triglycosyl diether and sulfated tetraglycosyl diether. It was concluded that strain NG4T represents a novel species of the genus Halobacterium, for which the name Halobacterium jilantaiense sp. nov. is proposed. The type strain is NG4T (=CGMCC 1.5337T=JCM 13558T).

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Kamiya, Takahiro. „Differences between the sensory organs of phytal and bottom-dwelling <i>Loxoconcha</i> (Ostracoda, Crustacea)“. Journal of Micropalaeontology 8, Nr. 1 (01.06.1989): 37–47. http://dx.doi.org/10.1144/jm.8.1.37.

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Abstract. The morphology and distribution patterns of pores with a bristle were studied on two Loxoconcha species living in adjacent but different habitats: the phytal species L. japonica and the bottom-dwelling species L. uranouchiensis. Both species have only one kind of pore – sieve-pore – from which either of two kinds of bristles emerges. The two types of bristles are here called the “smooth”– and the “twisted”–type according to their morphological features. The sieve-pore orifice of the phytal Loxoconcha remains completely open, whereas that of the bottom-dwelling species has a special morphology both in the sieve-plate and the basal part of the bristle to cope with the adhesion of dirt. The number and distribution pattern of “twisted”-type bristles (chemo-receptors?) are the same in both species. The “smooth”-type bristles (mechano-receptors?), however, are distributed more densely in the ventral area of the bottom-dwelling species compared with those of the phytal species. This difference seems to be related to the mode of life, specifically the difference in the manner of ventral contact with substrata. Some adaptive characters of ostracod pores are clarified and their significance to ostracod taxonomy and palaeocology is discussed.

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Cotton, Laura J., Wolfgang Eder und James Floyd. „Larger foraminifera of the Devil's Den and Blue Hole sinkholes, Florida“. Journal of Micropalaeontology 37, Nr. 1 (23.03.2018): 347–56. http://dx.doi.org/10.5194/jm-37-347-2018.

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Abstract. Shallow-water carbonate deposits are well-known from the Eocene of the US Gulf Coast and Caribbean. These deposits frequently contain abundant larger benthic foraminifera (LBF). However, whilst integrated stratigraphic studies have helped to refine the timing of LBF overturning events within the Tethys and Indo-Pacific regions with respect to global bio- and chemo-stratigraphic records, little recent work has been carried out in the Americas. The American LBF assemblages are distinctly different from those of Europe and the Indo-Pacific. It is therefore essential that the American bio-province is included in studies of LBF evolution, biodiversity and climate events to understand these processes on a global scale. Here we present the LBF ranges from two previously unpublished sections spanning 35 and 29 m of the upper Eocene Ocala limestone, as the early stages of a larger project addressing the taxonomy and biostratigraphy of the LBF of Florida. The study indicates that the lower member of the Ocala limestone may be Bartonian rather than Priabonian in age, with implications for the biostratigraphy of the region. In addition, the study highlights the need for multiple sites to assess the LBF assemblages and fully constrain ranges across Florida and the US Gulf and suggests potential LBF events for future integrated stratigraphic study.

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Raghav, Kanwal Pratap Singh, Wenting Wang, Michael J. Overman und Scott Kopetz. „MET overexpression as a hallmark of the epithelial-mesenchymal transition (EMT) phenotype in colorectal cancer.“ Journal of Clinical Oncology 31, Nr. 4_suppl (01.02.2013): 334. http://dx.doi.org/10.1200/jco.2013.31.4_suppl.334.

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334 Background: Dysregulation of the proto-oncogene MET (mesenchymal-epithelial transition factor gene) has been implicated in tumorigenesis and correlates with worse survival and chemo/radio-resistance in colorectal cancer (CRC). EMT has been identified as a dominant molecular characteristic of a subset of CRC tumors and represents a key feature in the developing colorectal taxonomy. The purpose of this study was to compare protein expression of MET with protein/gene expression of EMT markers and other clinicopathological characteristics, and to evaluate its impact on overall survival (OS). Methods: We performed an exploratory analysis of 590 CRC samples using data from The Cancer Genome Atlas. Fisher-exact test and Pearson’s method was used to determine the relationship between MET protein expression, clinicopathological characteristics and EMT marker protein expression by reverse-phase protein array (RPPA) and EMT-associated gene expression by RNA-sequencing. Regression tree method was applied to find the best cutoff point for MET using patients with available survival data. Overall survival (OS) was estimated non-parametrically using Kaplan-Meier curve and log-rank test was used to evaluate hazard ratio. Results: MET expression by RPPA did not correlate with traditional clinicopathologic characteristics. MET was overexpressed in 17% of CRC tumors and was significantly associated with OS (HR 2.92; 95% CI: 1.45 - 5.92). Correlation analysis of MET levels with gene expression of EMT markers AXL, CDH1, FGFR1, SNAIL, TWIST1/2, VIM, SLUG, ZEB1/2, FN1 demonstrated that the highest quartile of MET protein expression was associated with a 1.5 fold increase in ZEB1 (p = 0.002), a 1.4 fold increase in AXL (p = 0.005) and ZEB2 (p = 0.008), and a 1.3 fold increase in VIM (p = 0.02). MET expression also correlated strongly with protein expressions of SNAIL (transcription factor for EMT) (r = 0.96) and ERCC1 (r = 0.83) (a marker for oxaliplatin chemo-resistance). Conclusions: Increased MET protein expression is seen in 17% of CRC tumors and strongly correlates with a molecular EMT phenotype and poor survival in patients with CRC. MET protein expression may be a surrogate biomarker for this unique subset of CRC.

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Ng, Terry, Bader Alshamsan, Thanh Nguyen, James Butcher, Carol Stober, Lisa Vandermeer, Garth Nicholas, Alain Stintzi und Vimoj Nair. „BIOM-40. THERABIOME-GBM: THERAPEUTIC OUTCOMES RELATED TO GUT MICROBIOME IN GLIOBLASTOMA (GBM) PATIENTS RECEIVING CHEMO-RADIATION: A PROSPECTIVE OBSERVATIONAL STUDY“. Neuro-Oncology 25, Supplement_5 (01.11.2023): v13. http://dx.doi.org/10.1093/neuonc/noad179.0051.

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Abstract PURPOSE A major barrier to improving outcomes in glioblastoma multiforme (GBM) is overcoming a heavily immunosuppressed tumor and systemic environment, as demonstrated by several negative phase III randomized studies of nivolumab in both newly diagnosed and recurrent GBM. In several mouse avatar and human studies across several tumor cohorts including in a humanized microbiome GBM model, re-establishing a new gut microbiome (GM) via fecal transplantation led to tumor responses to PD-1/PD-L1 inhibition. A recent scoping review confirmed a paucity of GM clinical data of a uniform GBM cohort with adequate longitudinal GM sample collection. We are conducting a single-center prospective observational study to establish the feasibility of collecting stool samples throughout the time course of GBM treatment and upon recurrence, and to understand the gut microbiome dynamics of newly diagnosed IDH-wild type (WT) GBM patients. METHODS Patients with newly diagnosed unifocal IDH-1 R132H WT WHO grade 4 GBM, ECOG 0-2, at least 70% tumor resected with plan to receive temozolomide-radiation (TMZ-RT) and adjuvant TMZ +/- Tumor Treating Fields are eligible. Stool samples will be collected prior to TMZ-RT, 4 weeks after TMZ-RT, after adjuvant TMZ, and upon recurrence. The primary endpoint is feasibility, defined as stool sample obtained pre-RT, post-RT (pre-adjuvant TMZ), and at time of recurrence in ≥ 70% of enrolled participants, 75% of target sample size enrolled within 2 years, and stool sample volume and quality sufficient for analysis in ≥ 75% of collected samples. Secondary endpoints include progression-free survival (PFS) in pre-defined GM subgroups, GM taxonomy and diversity in late vs. early progressors, and GM differences in patients with and without post-RT necrosis. Age, sex, race, concurrent medication, corticosteroid use, and diet will be carefully accounted for. Patient reported outcomes using EORTC-QLQ-BN20 and QLQ-C30 will be collected at baseline, 3-, 6-, 9-, and 12-months.

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Dissertationen zum Thema "Chemo taxonomy"

Choudhury, Dibakar. „Distribution and chemo taxonomy of same members of lauraceae in Tarai and Duars“. Thesis, University of North Bengal, 2015. http://ir.nbu.ac.in/hdl.handle.net/123456789/1887.

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Buchteile zum Thema "Chemo taxonomy"

„Secondary Substances for Chemo-Taxonomy and Allelopathy“. In Mechanisms of Landscape Rehabilitation and Sustainability, herausgegeben von Narcin Palavan-Unsal, Valentin Kefeli und Winfried Blum, 64–67. BENTHAM SCIENCE PUBLISHERS, 2012. http://dx.doi.org/10.2174/978160805168711101010064.

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Koçyiğit, Mine, Fethi Geçimli, Bilge Bicak, Özge Vatandaşlar und Serda Kecel Gunduz. „A Contribution of Spectrophotometric Methods to Medicinal Plant Taxonomy“. In Advances in Bioinformatics and Biomedical Engineering, 297–319. IGI Global, 2022. http://dx.doi.org/10.4018/978-1-6684-7337-5.ch012.

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Plant taxonomy is the science that finds, identifies, describes, classifies, and names plants. It is one of the main branches of taxonomy (the science that finds, describes, classifies, and names living things). Plant taxonomy is closely allied to plant systematics, and there is no sharp boundary between the two. In practice, “plant systematics” involves relationships between plants and their evolution, especially at the higher levels, whereas “plant taxonomy” deals with the actual handling of plant specimens. The precise relationship between taxonomy and systematics, however, has changed along with the goals and methods employed. Many different methods are used in plant taxonomy. Morphological, anatomical, karyological, palynological, chemo-taxonomical, and molecular methods are used especially in medicinal plant taxonomy today. Spectrophotometric methods have just begun to be used in medicinal plant taxonomy. It is one of the most practical methods that can be used to reveal the differences among species without wasting time and money.

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ELIX, J. A. „The lichen genus Relicina in Australasia“. In Tropical Lichens: Their Systematics, Conservation, and Ecology, 16–34. Oxford University PressOxford, 1991. http://dx.doi.org/10.1093/oso/9780198577201.003.0002.

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Abstract The lichen genus Relicina Hale, is characterized by narrow, adnate lobes, marginal bulbate cilia, and usnic acid in the upper cortex. Morphological and chemical evolutionary trends and the geographic distribution of the genus arc discussed. Taxonomic problems arise in several species complexes. The occurrence of overlapping chemo syndromes of medullary metabolites makes accurate chemical deter minations difficult, but of critical importance since there is a high degree of correlation between chemistry and morphological characters. Chemistry is important both as a species character and in the delimitation of evolutionary direction. The discontinuity of Relicina floras of Australasia and Indonesia is discussed, as well as a novel interpretation of the disjunct distribution of R. abstrusa (Australasia and the Caribbean). The majority of species of Relicina are restricted to trunks and canopy branches of tropical mangroves and primary coastal and lower montane rainforests; their major habitat is threatened by logging and forest clearance.

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Konferenzberichte zum Thema "Chemo taxonomy"

Popović, Filip J., Tanja B. Trakić, Mirjana M. Stojanović und Jovana M. Sekulić. „A new record of Dendrobaena Serbica karaman, 1973 (Clitellata; Lumbricidae) from Serbia“. In 2nd International Conference on Chemo and Bioinformatics. Institute for Information Technologies, University of Kragujevac, 2023. http://dx.doi.org/10.46793/iccbi23.284p.

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The new records of the little-known Balkan endemic species Dendrobaena serbica Karaman, 1973 from Kopaonik Mountain, Serbia, are reported. So far, the species has been recorded at four localities: three localities in Serbia (Čakor, Kragujevac, Niš) and one locality in Montenegro (Prokletije Mountain). The first records were from 1973 from the locality in southwestern Serbia (Čakor, Prokletije). A review of the geographical distribution of D. serbica is presented. The confirmed geographical distribution of the species includes only the territories of the Republic of Serbia and Montenegro. Also, its distinction from the taxonomic similar congeners Dendrobaena illyrica (Cognetti de Martiis, 1906), Dendrobaena sasensis Šapkarev 1983 and Dendrobaena vejdovskyi (Černosvitov, 1935) is discussed. Further, the habitats of this species are restricted to the uppermost litter layer in forest soil and humid forests near stream banks. This paper summarized the knowledge of the taxonomy, ecology, and distribution of a little-known Balkan endemic species D. serbica.

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Trakić, Tanja, Mirjana Stojanović, Filip Popović, Slobodanka Radosavljević und Jovana Sekulić. „DISTRIBUTION OF ENDEMIC SPECIES „CERNOSVITOVIA DUDICHI“ IN SERBIA“. In 1st INTERNATIONAL Conference on Chemo and BioInformatics. Institute for Information Technologies, University of Kragujevac,, 2021. http://dx.doi.org/10.46793/iccbi21.230t.

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The genus Cernosvitovia consists of nine species in the whole world. Out of the nine species, eight species are with primary distribution in the eastern part of the Balkan Peninsula (except Cernosvitovia schweigeri). In the Lumbricidae fauna of Serbia, seven species from this genus have been registered. Among them, 6 taxa are endemic. The aim of this paper is to present new data of the endemic species Cernosvitovia dudichi Zicsi & Šapkarev, 1982, based on the current taxonomic status of species, literature data, and our unpublished data. In this paper, we have summarized the knowledge on the geographic distribution, biology, and habitat C. dudichi in Serbia. Our recent investigations have revealed new records for C. dudichi in Central Serbia. After 30 years, this species was found in another place in this area, in Goč Mt. New locality suggests that C. dudichi possess a wider range than it was previously thought.

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