Готові списки джерел за темами / LOLbin

Добірка наукової літератури з теми "LOLbin"

Автор: Grafiati
Опубліковано: 19 червня 2021
Оновлено: 1 лютого 2022

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Зміст

  1. Статті в журналах
  2. Дисертації
  3. Книги
  4. Частини книг
  5. Тези доповідей конференцій

Статті в журналах з теми "LOLbin":

1

Patchett, Brian, Ravi Gooneratne, Lester Fletcher, and Bruce Chapman. "Seasonal changes in leaf and stem loline alkaloids in meadow fescue." Crop and Pasture Science 62, no. 3 (2011): 261. http://dx.doi.org/10.1071/cp10266.

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Leaf and stem loline alkaloid concentration in 10 European meadow fescue (Festuca pratensis Huds.) lines grown in a field in Canterbury, New Zealand, were determined in samples collected six times between early spring 2004 and late autumn 2005. Significant differences in loline alkaloid concentrations were noted between lines and between harvest times. Higher total loline alkaloid concentrations (up to 4990 µg g–1) were found in stems compared to leaf (up to 1770 µg g–1). However, the seasonal accumulation pattern of different loline alkaloid concentrations in leaf and stem varied. In most lines, stem loline concentration peaked sharply in late spring and declined during early summer and autumn. The seasonal pattern of leaf loline alkaloid concentration followed the stem concentration except for a sharp decline in early summer followed by an increase in late summer. In most instances, the concentration of N-formyl loline was the highest > N-acetyl loline > N-acetyl norloline > N-methyl loline. The possible role of stem and leaf loline alkaloids to deter pasture-feeding insects is briefly discussed.
2

Patchett, Brian, Ravi Gooneratne, Lester Fletcher, and Bruce Chapman. "Seasonal distribution of loline alkaloid concentration in meadow fescue infected with Neotyphodium uncinatum." Crop and Pasture Science 62, no. 7 (2011): 603. http://dx.doi.org/10.1071/cp11017.

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Loline alkaloids are present in meadow fescue containing the endophyte (Neotyphodium uncinatum Gams, Petrini and Schmidt) (Clavicipitacae). Root, crown and shoot loline alkaloid concentrations in 10 selected lines from meadow fescue ecotypes are reported for the first time, from a Canterbury farm during 2004–05. The concentrations of four loline alkaloid derivatives, N-formyl loline (NFL), N-acetyl loline (NAL), N-acetyl norloline (NANL) and N-methyl loline (NML), in these lines (each line represented by one genotype) were determined at four harvest dates during late spring, late summer, and early and late autumn. There were marked differences in loline alkaloid concentration between lines and seasons. Maximum shoot loline concentration was recorded in summer (up to 2860 µg/g in Fp408). Root loline alkaloid concentration was substantially higher in late autumn (up to 790 µg/g in Fp408) and the shoot concentration correspondingly lower than in spring, summer and early autumn suggesting loline alkaloid transportation from shoots to roots. In the lines tested at each of the four harvest dates in spring, summer, and autumn, the root, crown, and shoot alkaloid concentration with minor exceptions was NFL > NAL > NANL > NML.
3

Riedell, W. E., R. E. Kieckhefer, R. J. Petroski, and R. G. Powell. "Naturally-Occurring and Synthetic Loline Alkaloid Derivatives: Insect Feeding Behavior Modification and Toxicity2." Journal of Entomological Science 26, no. 1 (January 1, 1991): 122–29. http://dx.doi.org/10.18474/0749-8004-26.1.122.

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Methanol extracts of tall fescue plants (Festuca arundinacea Schreb.) infected with an endophytic fungus (Acremonium coenophialum Morgan-Jones and Gams) contain loline alkaloids which deter feeding and are toxic to insects. This study was conducted to determine the effect of several naturally-occurring and semi-synthetic loline alkaloid derivatives on insects. The influence of these compounds on the feeding behavior and weight of fall armyworm larvae, Spodoptera frugiperda Smith, and European corn borer larvae, Ostrinia nubilalis Hübner, was evaluated using two-choice, diet-incorporated feeding behavior modification bioassays. Toxicity of these compounds to greenbugs, Schizaphis graminum Rondani, was evaluated and compared with the toxicity of the insecticide nicotine sulfate. Fall armyworm larvae were more susceptible, in terms of feeding behavior modification and reduced weight gain, to specific loline derivatives than European corn borer larvae. N-acetyl loline appeared to show toxic effects, in terms of reduced larval weight in the absence of feeding behavior modification, toward both fall armyworm and European corn borer larvae. Several of the naturally-occurring loline alkaloids, namely N-formyl loline, N-acetyl loline and N-methyl loline, had LC50 values against apterous greenbug adults similar to nicotine sulfate.
4

Bryant, R. H., N. E. Cameron, and G. R. Edwards. "Response of black beetle and redheaded pasture cockchafer larvae to loline alkaloids in meadow fescue roots." New Zealand Plant Protection 63 (August 1, 2010): 219–23. http://dx.doi.org/10.30843/nzpp.2010.63.6571.

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Meadow fescue (Festuca pratensis) infected with Neotyphodium uncinatum endophyte was used to investigate the response of redheaded pasture cockchafer (Adoryphorus coulonii) and black beetle (Heteronychus arator) larvae to loline alkaloids Root material of meadow fescue genotypes varying in loline alkaloid concentration were fed to individual larvae in a nochoice bioassay Total root loline concentrations ranged from 500 to 3000 g/g DM Growth of second instar cockchafer larvae was significantly reduced under treatments with highest loline concentrations (P
5

Easton, H. S., T. B. Lyons, W. J. Mace, W. R. Simpson, A. C. M. De Bonth, B. M. Cooper, and K. A. Panckhurst. "Differential expression of loline alkaloids in perennial ryegrass infected with endophyte isolated from tall fescue." NZGA: Research and Practice Series 13 (January 1, 2007): 163–65. http://dx.doi.org/10.33584/rps.13.2006.3077.

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Twenty half-sibling families of perennial ryegrass inoculated with a strain of endophyte isolated from tall fescue were analysed for loline concentrations. Inoculation success varied between families. Frequency of loline expression of different families varied moderately. Family effect on loline concentrations was significant. In another set of material, derived from plants exposed to field selection, endophyte infection frequency in seed harvested from plants verified as infected was close to 100%. Loline concentrations varied significantly between families. For nine of 23 families, none of the three plants sampled showed any measurable loline. As in other data sets, the results show variation in concentrations of endophyte alkaloids controlled by the genetics of the host plant. Keywords: Neotyphodium, host variation, adaptation, symbiosis, lolines
6

Espinoza, Javier, Manuel Chacón-Fuentes, Andrés Quiroz, Leonardo Bardehle, Paul Escobar-Bahamondes, and Emilio Ungerfeld. "Antifeedant Effects and Repellent Activity of Loline Alkaloids from Endophyte-Infected Tall Fescue against Horn Flies, Haematobia irritans (Diptera: Muscidae)." Molecules 26, no. 4 (February 4, 2021): 817. http://dx.doi.org/10.3390/molecules26040817.

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Haematobia irritans is an obligate bloodsucking ectoparasite of cattle and is the global major pest of livestock production. Currently, H. irritans management is largely dependent upon broad-spectrum pesticides, which lately has led to the development of insecticide resistance. Thus, alternative control methods are necessary. Endophyte-infected grasses have been studied as an alternative due to their capability to biosynthesize alkaloids associated with anti-insect activities. Thus, the main aim of this study was to evaluate the antifeedant and repellent activity of lolines obtained from endophyte-infected tall fescue against H. irritans adults in laboratory conditions. The alkaloid extract (ALKE) was obtained by acid–base extraction. N-formyl loline (NFL) and N-acetyl loline (NAL) were isolated by preparative thin layer chromatography (pTLC) and column chromatography (CC), and the loline was prepared by acid hydrolysis of a NFL/NAL mixture. Loline identification was performed by gas chromatography coupled to mass spectrometry (GC/MS). Feeding behavior was evaluated by a non-choice test, and olfactory response was evaluated using a Y-tube olfactometer. Accordingly, all samples showed antifeedant activities. NFL was the most antifeedant compound at 0.5 µg/µL and 1.0 µg/µL, and it was statistically equal to NAL but different to loline; however, NAL was not statistically different to loline. NFL and NAL at 0.25 µg/µL were more active than loline. All samples except loline exhibited spatial repellency in the olfactometer. Thus, the little or non-adverse effects for cattle and beneficial activities of those lolines make them suitable candidates for horn fly management.
7

JONES, T. A., R. C. BUCKNER, and P. B. BURRUS II. "SEED TRANSMISSION OF PYRROLIZIDINE ALKALOID ACCUMULATION CAPACITY IN TALL FESCUE." Canadian Journal of Plant Science 65, no. 2 (April 1, 1985): 317–21. http://dx.doi.org/10.4141/cjps85-044.

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Pyrrolizidine alkaloids (N-formyl loline and N-acetyl loline) and the endophytic fungus tentatively identified as Sphacelia typhina (Pers.) Sacc. (= Acremonium coenophialum Morgan-Jones and W. Gams), the imperfect stage of Epichloe typhina (Fr.) Tul., have both been suspected as etiological agents of summer syndrome in tall fescue (Festuca arundinacea Schreb.). This syndrome is a toxicological disorder characterized by poor cattle growth with visible symptoms accentuated by high ambient temperatures. Alkaloid levels were measured with gas-liquid chromatography and presence or absence of the endophyte was determined by cytological observation. The endophyte was controlled by soil incorporation of the systemic fungicide benomyl. Variability was found among the 11 parental clones of the synthetic ’Kenhy’ for level of loline alkaloids. Loline alkaloids were present in seed of endophyte-infected panicles but absent in seed of endophyte-free panicles of the same clone. Progeny accumulated loline alkaloids only when their female parents were infected. These results suggest that the seed source is the critical factor for both the endophyte status of a plant and its capacity to accumulate loline alkaloids.Key words: Sphacelia typhina (Pers.) Sacc, Acremonium coenophialum Morgan-Jones and W. Gams, Epichloe typhina (Fr.) Tul., benomyl, ryegrass staggers
8

Goodwin, Michael J., James C. Card, and John S. Spencer. "Study of Double Hull Tanker Lolling and Its Prevention." Marine Technology and SNAME News 33, no. 03 (July 1, 1996): 183–202. http://dx.doi.org/10.5957/mt1.1996.33.3.183.

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Lolling is an uncontrollable list caused by inadequate transverse stability in the upright condition. With the advent of double hull tankers, lolling incidents have begun to occur, usually while loading or unloading cargo. These lolling incidents have damaged loading arms and piers and resulted in ship damage. There is also the risk of injury or death to personnel, a risk of fire, and a risk of polluting oil spills from damaged loading facilities. This study considers the problem of lolling of double hull, single tank across tankers in the 35,000 DWT to 150,000 DWT range. This is the size range of tankers which have experienced incidents of lolling. Below this range are mostly product tankers which have greater cargo tank subdivision. Above 150,000 DWT, strength and tank size considerations dictate against the single tank across configuration. The study recommends that new tankers be required to have sufficient intact stability to prevent the occurrence of lolling, preferably by design without having to consider cargo or ballast loading sequences. The study also provides an approach on how to demonstrate that sufficient stability is available under all loading conditions possible.
9

Blakemore, Paul R., Volker K. Schulze, and James D. White. "Asymmetric synthesis of (+)-loline." Chemical Communications, no. 14 (2000): 1263–64. http://dx.doi.org/10.1039/b003121f.

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10

Garnida, Susie Chrismalia, and Ni Ketut Mirahayuni. "EDITING OF EKA SABARA’S MANUSCRIPT “PARA ULAMA DAN TOKOH LOLOAN ABAD 19 MASEHI: SYARIF TUE DAN ENCIK YA’KUB”: A DOCUMENTATION OF LOLOAN ISLAMIC FIGURES IN JEMBRANA, BALI." ANAPHORA: Journal of Language, Literary and Cultural Studies 3, no. 1 (July 31, 2020): 29–37. http://dx.doi.org/10.30996/anaphora.v3i1.3547.

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Editing of Eka Sabara’s manuscript entitled Para Ulama dan Tokoh Loloan Abad ke-19 Masehi: Syarif Tue dan Encik Ya’kub (or in brief, Para Ulama dan Tokoh Loloan) is the second work of the efforts to document cultural legacy of the Loloan islamic community, of Jembrana, west Bali. This second manuscript focuses on the Loloan moslem figures of the 19th century, the time of which was thought to be the second landmark of the spread of Islamic faith and community in the area. In contrast to the first manuscript editing of the same author, i.e. of Eka Sabara’s Daeng Nachoda (2018), the editing of Para Ulama dan Tokoh Loloan manuscript involves significant addition of information to the original manuscript. The problems raised in the editing process comprises: (1) what are the characteristics of Eka Sabara’s manuscript entitled Para Ulama dan Tokoh Loloan?, and (2) what are editing strategies necessary to produce a coherent and cohesive text? The editing is based on Blanchard dan Root’s (1997) guides on editing academic texts, and content analysis method and editing techniques are conducted on the first draft (the manuscript) to suit the theme and purpose of the manuscript. The editing result shows that the manuscript needs to undergo major addition of chapters to meet the theme and to include other religious figures who also took part in the spread of Islamic faith and development of Loloan moslem community in Jembrana. Other editing techniques include addition, omission, rearrangement of information, all of which are used to produce a coherent, theme-suppporting text. The result of the editing process is a ready manuscript to be registered in the national library catalogue (with ISBN number) and then to be published as the document of a legacy of values and wisdom held and lived by the historical islamic figures in the Loloan community in Jembrana.
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Статті в журналах Дисертації Книги

Дисертації з теми "LOLbin":

1

Lingaas, Türk Jakob. "Living off the Land Binaries with Virtual Machines." Thesis, Högskolan i Halmstad, 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:hh:diva-44842.

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As the threat of ransomware increases, the ever-growing demand for more efficient cybersecurityimplementations invite cybercriminals to find new methods of bypassing these counter measures.One method for bypassing potential antivirus software is to use the binaries already present on thevictim device, causing them damage by using trusted binaries which does not trigger windowsdefender (or similar antivirus measures).This thesis attempts to use virtual machines as a living of the land binary. By utilizing the virtualenvironment of Windows iso images within a hypervisor, the attacker can download and execute abinary without being stopped by the bare metal host’s IDS or IPS. As the attacker controls the virtualenvironment, they can disable Windows Defender within the virtual machine and acquire theransomware without the upper layer of IDS or IPS even noticing, meaning they also remain stealthyfor a persistent engagement. The attacker would then proceed to use the share folder functionalityof the hypervisor and target a directory with sensitive files, before executive the binary within thevirtual machine. To the bare metal host, it would look like a hypervisor process is affecting the fileswithin the shared folder, which does not raise any alarms. However, what is actually happening is theransomware of the attacker’s choice has encrypted the files of the target directory (or mounteddrive, depending on method used), and can now continue to the next directory (or drive).The results of this work showed that virtual machines can be used for living off the land binariesattacks by utilizing either the shared folder functionality of a specific hypervisor, or by mounting adrive to a virtual machine. The experiments were proven to work within their own parameters,assuming certain requirements are fulfilled for the attack to be doable. Defenders can tweak IDS andIPS policies to limit or warn when a user access or changes partitions or limiting the accessibility forthe hypervisors native to the machine.
2

Faulkner, Jerome Ralph. "INTERMEDIATE STEPS OF LOLINE ALKALOID BIOSYNTHESIS." UKnowledge, 2011. http://uknowledge.uky.edu/gradschool_diss/209.

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Epichloë species and their anamorphs, Neotyphodium species, are fungal endophytes that inhabit cool-season grasses and often produce bioprotective alkaloids. These alkaloids include lolines, which are insecticidal and insect feeding deterrents. Lolines are exo-1-aminopyrrolizidines with an oxygen bridge between carbons 2 and 7, and are usually methylated and formylated or acetylated on the 1-amine. In previously published studies lolines were shown to be derived from the amino acids L-proline and L-homoserine. In addition the gene cluster involved in loline-alkaloid biosynthesis has also been characterized. In this dissertation a survey of plant-endophyte symbioses revealed a phenotype with only N-acetylnorloline. This phenotype provided insights into loline alkaloid production. This dissertation focuses on determining the steps to loline biosynthesis after the amino acid precursors. The study involves feeding isotopically labeled potential precursors to loline-alkaloid-producing cultures of Neotyphodium uncinatum, as well as RNA interference (RNAi) of N. uncinatum genes for steps in the pathway. Synthesized deuterated compounds were fed to loline-alkaloid-producing cultures of N. uncinatum to test their possible roles as precursors or intermediates in the loline-alkaloid pathway. N-Formylloline was extracted from the cultures and assayed by GCMS for incorporation of the deuterium label. The results indicated that N-(3-amino, 3-carboxy)propylproline and exo-1-aminopyrrolizidine are intermediates in the loline-alkaloid biosynthetic pathway. Plasmids were also designed for expression of double-stranded RNA homologous to loline-alkaloid biosynthesis genes, and introduced by transformation into N. uncinatum. This RNAi strategy resulted in fungal transformants altered in loline-alkaloid profiles. The RNAi results indicated that N-acetyl-1-aminopyrrolizidine is the intermediate before oxygen bridge formation. Based on the results of this study and the likely roles of the loline-alkaloid biosynthesis genes inferred from signature sequences of their predicted protein products, I propose a pathway of bond formation steps in loline-alkaloid biosynthesis.
3

Lolling, Andreas [Verfasser]. "Analyse der menschlichen Zuverlässigkeit bei Kommissioniertätigkeiten / Andreas Lolling." Aachen : Shaker, 2003. http://d-nb.info/1179019466/34.

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4

Cakmak, Mesut. "Total synthesis of loline alkaloids and studies toward naphthomycin K." Diss., lmu, 2012. http://nbn-resolving.de/urn:nbn:de:bvb:19-146087.

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5

Zhang, Dong-Xiu. "Loline alkaloid biosynthesis gene expression in epichloë endophytes of grasses." Lexington, Ky. : [University of Kentucky Libraries], 2008. http://hdl.handle.net/10225/785.

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Thesis (Ph. D.)--University of Kentucky, 2008.
Title from document title page (viewed on May 12, 2008). Document formatted into pages; contains: xvi, 221 p. : ill. (some col.). Includes abstract and vita. Includes bibliographical references (p. 214-219).
6

ZHANG, DONG-XIU. "LOLINE ALKALOID BIOSYNTHESIS GENE EXPRESSION IN EPICHLOE ENDOPHYTES OF GRASSES." UKnowledge, 2008. http://uknowledge.uky.edu/gradschool_diss/592.

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Loline alkaloids (LA) are secondary metabolites produced by Epichloandamp;euml; (anamorph, Neotyphodium) grass endophytes. They are toxic and deterrent to a broad range of herbivorous insects but not to livestock. This protective bioactivity has spurred considerable research into the LA biosynthetic pathway. LOL, the gene cluster containing nine genes, is required for LA biosynthesis. The regulation of LOL genes during LA production in culture and in symbio is of interest. In this study, coordinate regulation between LOL gene expression and LA production level was investigated in both MM culture and symbiota. Results showed that expression of LOL genes in N. uncinatum MM culture were tightly correlated with each other (p andamp;lt; 0.0005), and all presented a significant temporal quadratic pattern during LA production. Gene expression started before LA were detectable, and increased while LA accumulated. The highest gene expression level was reached before the highest amounts of LA were detected, and gene expression level declined to a very low level after amounts of LA plateaued. Observations suggested that the hierarchical clusters based on the correlation coefficient could help to predict the roles of LOL genes in the LA pathway. In symbiota, coordinate coregulation of LOL gene expression with LA was found in E. festucae-meadow fescue inflorescences and stromata, whereby lower LOL gene expression corresponded with the lower LA level in stromata. In N. uncinatum (or N. siegelii)-meadow fescue vegetative tissues, dramatically higher LA levels were found in younger leaf tissue than in older leaf tissue, yet no evidence was found to relate this difference to LOL gene expression differences. Instead, substrate availability may regulate the LA level. In particular, asparagine was more than 10-fold higher in young leaf tissue than in old tissue, although proline was significantly lower in young tissue. Therefore, different regulatory mechanisms underlie LOL gene expression and LA production in different circumstances. The GUS activity of Pro-lolC2-GUS and Pro-lolA2-GUS in Neotyphodium species was almost undetectable in culture, though the activity could be detected in symbiota. The mRNA of GUS did not exhibit the same pattern as lolC2 or lolA2 in culture during LA production time course. A Pro-lolC2-cre transgene was expressed in complex medium, in which lolC2 mRNA was not detectable. These results suggest that proper regulation of LOL genes in culture or symbiota is dependent on the LOL cluster.
7

Pan, Juan. "Ether Bridge Formation and Chemical Diversification in Loline Alkaloid Biosynthesis." UKnowledge, 2014. http://uknowledge.uky.edu/plantpath_etds/14.

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Loline alkaloids, found in many grass-Epichloë symbiota, are toxic or feeding deterrent to invertebrates. The loline alkaloids all share a saturated pyrrolizidine ring with a 1-amine group and an ether bridge linking C2 and C7. The steps in biosynthesis of loline alkaloids are catalyzed by enzymes encoded by a gene cluster, designated LOL, in the Epichloë genome. This dissertation addresses the enzymatic, genetic and evolutionary basis for diversification of these alkaloids, focusing on ether bridge formation and the subsequent modifications of the 1-amine to form different loline alkaloids. Through gene complementation of a natural lolO mutant and comparison of LOL clusters in strains with different loline alkaloid profiles, I found that lolO, predicted to encode a 2-oxoglutarate-dependent nonheme iron (2OG/Fe) dioxygenase, is required in formation of the ether bridge. Through application of isotopically labeled compound to Epichloë uncinata culture, I established that exo-1-acetamidopyrrolizidine (AcAP) and N-acetylnorloline (NANL) are true pathway intermediates. Application of AcAP to yeast expressing lolO resulted in production of NANL, establishing that LolO is sufficient to catalyze this unusual oxygenation reaction. After ether formation, modifications on the 1-amino group give loline, N-methylloline (NML), N-formylloline (NFL) and N-acetylloline (NAL). A double knockout of lolN, predicted to encode an acetamidase, and lolM, predicted to encode a methyltransferase, produced only NANL. Complementation of the double knockout with wild-type lolN and lolM restored the loline alkaloid profile. These results indicate that LolN is involved in deacetylating NANL to produce norloline, which is then modified to form the other lolines. Crude protein extract of a yeast transformant expressing LolM converted norloline to loline and NML, and loline to NML, supporting the hypothesis that LolM functions as a methyltransferase in the loline-alkaloid biosynthesis pathway. The alkaloid NAL was observed in some but not all plants symbiotic with Epichloë siegelii, and when provided with exogenous loline, asymbiotic meadow fescue (Lolium pratense) plants produced N-acetylloline (NAL), indicating that a plant acetyltransferase converts loline to NAL. I further analyzed the basis for loline alkaloid diversity by comparing the LOL clusters in the Epichloë and Atkinsonella species with different loline alkaloid profiles, and found that LOL clusters changed position, orientation and gene content over their evolutionary history. Frequent, independent losses of some or all late pathway genes, lolO, lolN, lolM and lolP, resulted in diverse loline alkaloid profiles. In addition, phylogenetic analyses demonstrated transspecies polymorphism of the LOL clusters. Based on my findings, I established that in Epichloë and Atkinsonella species the ether bridge is formed on acetamidopyrrolizidine. My study of the loline alkaloid profile of Adenocarpus decorticans (Fabaceae) suggests that these plants probably use a similar strategy at least with respect to ether-bridge formation. Further diversification steps of loline alkaloids in grass-Clavicipitaceae symbiota are carried out by enzymes of both Epichloë species and the host plant. Finally, I present evidence that LOL clusters have evolved by balancing selection for chemical diversity.
8

Bhardwaj, Minakshi. "FORMATION OF THE ETHER BRIDGE IN THE LOLINE ALKALOID BIOSYNTHETIC PATHWAY." UKnowledge, 2017. http://uknowledge.uky.edu/chemistry_etds/75.

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Lolines are specialized metabolites produced by endophytic fungi, such as Neotyphodium and Epichloë species, that are in symbiotic relationships with cool-season grasses. Lolines are vital for the survival of the grasses because their insecticidal and antifeedant properties protect the plant from insect herbivory. Although lolines have various bioactivities, they do not have any concomitant antimammalian activities. Lolines have complex structures that are unique among naturally occurring pyrrolizidine alkaloids. Lolines have four contiguous stereocenters, and they contain an ether bridge connecting C(2) and C(7) of the pyrrolizidine ring. An ether bridge connecting bridgehead C atoms is unusual in natural products and leads to interesting questions about the biosynthesis of lolines in fungal endophytes. Dr. Pan, who was a graduate student in Dr. Schardl Lab at University of Kentucky, isolated a novel metabolite, 1-exo-acetamidopyrrolizidine (AcAP). She observed that AcAP was accumulating in naturally occurring and artificial lolO mutants. I synthesized an authentic sample of (±)-AcAP and compared it spectroscopically with AcAP isolated from a lolO mutant to determine the structure and stereochemistry of the natural product. I was also able to grow crystals of synthetic (±)-AcAP, X-ray analysis of which further supported our structure assignment. There were two possible explanations for the fact that a missing or nonfunctional LolO led to the accumulation of AcAP: that AcAP was the actual substrate of LolO, or that it was a shunt product derived from the real substrate of LolO, 1-exo-aminopyrrolizidine (AP), and that was produced only when LolO was not available to oxidize AP. To distinguish between the two hypotheses, I synthesized 2´,2´,2´,3-[2H4]-AcAP. Dr. Pan used this material to confirm that AcAP was an intermediate in loline alkaloid biosynthesis, not a shunt product. To determine the product of LolO acting on AcAP, Dr. Pan expressed LolO in yeast (Saccharomyces cerevisiae). When Dr. Pan fed AcAP (synthesized by me) to the modified organism, it produced NANL, suggesting that LolO catalyzed two C–H activations of AcAP and the formation of both C–O bonds of the ether bridge in NANL, a highly unusual transformation. Dr. Chang then cloned, expressed, and purified LolO and incubated it with (±)-AcAP, 2-oxoglutarate, and O2. He observed the production of NANL, further confirming the function of LolO. Dr. Chang also observed an intermediate, which we tentatively identified as 2-hydroxy-AcAP. In order to determine whether the initial hydroxylation of AcAP catalyzed by LolO occurred at C(2) or C(7), I prepared (±)-7,7-[2H2]- and (±)-2,2,8-[2H3]-AcAP. When Dr. Pan measured the rate of LolO-catalyzed hydroxylation of these substrates under conditions under which only one C–H activation would occur, she observed a very large kinetic isotope effect when C(2) was deuterated, but not when C(7) was deuterated, establishing that the initial hydroxylation of AcAP occurred at the C(2) position. In order to determine the stereochemical course of C–H bond oxidation by LolO at C(2) and C(7) of AcAP, I synthesized trans- and cis-3-[2H]-Pro and (2S,3R)-3-[2H]- and (2S,3S)-2,3-[2H2]-Asp. Feeding experiments with these substrates carried out by both Dr. Pan (Pro) and me (Asp) showed that at both the C(2) and C(7) positions of AcAP, LolO abstracted the endo H atoms during ether bridge formation. In summary, feeding experiments with deuterated (±)-AcAP derivatives and its amino acid precursors have shown that AcAP is an intermediate in loline biosynthesis. We have shown that LolO catalyzes the four-electron oxidation of AcAP at the endo C(2) position first and then the endo C(7) position to give NANL.
9

BOMPETI, NGILA. "Les noms des plantes en lolia. Approche ethnolinguistique." Université Marc Bloch (Strasbourg) (1971-2008), 1993. http://www.theses.fr/1993STR20043.

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Expliquer et comprendre le fonctionnement morphologique et semantique des noms de plantes necessite la prise en consideration des vegetaux qui en sont des referents et du sujet qui en est l'artisan et l'usager. Il s'agit, en d'autres termes, d'etudier les phytonymes en les integrant dans le cadre socio-culturel general pour lequel ils sont produits, parce que ces unites lexicales sont de veritables produits des experiences diverses que l'homme a faites avec le monde vegetal. Le fonctionnement morphologique connait en lolia divers procedes qui relevent tous, comme il en est d'ailleurs des autres langues, de deux grands mecanismes de creation, a savoir la derivation et la com position. Le fonctionnement semantique s'eclaire, lui, par des traits physiques, fonctionnels et circonstanciels de denomination. Les procedes de denomination qu'ils soient morphologiques ou semantiques sotn fondes sur la relation partie tout et sur des relations de similitude et de contiguite. Certes, ces relations sont attestees partout ailleurs, mais elles n'ont pas partout le meme rendement et ne portent pas non plus sur les memes elements. Cela differencie certainement les langues les unes des autres, et par la aussi, les phytonymes
Explaining and understanding the morphological semantic function of the names of plants necessitates taking into consideration the plants which are the referents as well as (well as) the artisan and user. This means, in other words, the study of the pytonyms by situating them in the socio-cultural environment for which they are produced because these lexical units are the concrete result of diverse experiences that man has had with the plant world. The morphological function of phytonyms has diverse procedures. They all stem from two main lexical mecanisms which are derivation and composition. The semantic function of phytonyms is explained by traits of denomination : physical, functional and circumstancial traits. These denominational processes, be they, morphologic or semantic, are founded on the part whole relationship and on the relationship of similitude and contiguity. Granted, these relationships are documented everywhere, but they do not apply to the same elements. This has certainly differentiated languages from each other and, by doing so, phytonyms
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Çakmak, Mesut [Verfasser]. "Total Synthesis of Loline Alkaloids and Studies toward Naphthomycin K / Mesut Çakmak." München : Verlag Dr. Hut, 2012. http://d-nb.info/1025821610/34.

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Книги з теми "LOLbin":

1

Gammacurta, Massimo. Lolli-pop. Amsterdam: BIS, 2010.

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Rammūrti, Doḍḍi. Bokkena lolli: Daḷita pāṭa. Nallagoṇḍa: Gōsaṅgi Nīli Sāhiti, 2000.

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3

Ndao, Aliou. Lolli (woy) ; taataan (woy). Dakar, Sénégal: IFAN, 1999.

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4

Gatmaitan, Luis P. Nang maghasik ng lagim si Lolit lamok =: Lolit mosquito brings terror. Manila: Hiyas Children's Collection, 1999.

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5

Sumarsono. Pemertahanan bahasa Melayu Loloan di Bali. [Jakarta: Pusat Pembinaan dan Pengembangan Bahasa, Departemen Pendidikan dan Kebudayaan, 1993.

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6

Nyathi, Pathisa. Madoda lolani incukuthu: Imbali yamaNdebele, 1896. Gweru, Zimbabwe: Mambo Press, 1999.

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Everson, Lenny. The minor odyssey of Lollie "Heronfeathers" Singer. [Canada]: Penumbra Press, 2000.

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8

Purna, I. Made. Tradisi barzanji pada masyarakat Loloan, Kabupaten Jembrana, Bali. Yogyakarta: Penerbit Ombak, 2013.

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9

Kocadağ, Burhan. Lolan oymağı ve yakın çevre tarihi. Yalova [Turkey]: B. Kocadağ, 1987.

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10

Bebe, Michael Boro. Bau lolon: Ritus sentral adat budaya Lamaholot. Larantuka: Sekolah Tinggi Pastoral Reinha, 2012.

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Частини книг з теми "LOLbin":

1

Powell, Richard G., and Richard J. Petroski. "The Loline Group of Pyrrolizidine Alkaloids." In Alkaloids: Chemical and Biological Perspectives, 320–38. New York, NY: Springer New York, 1992. http://dx.doi.org/10.1007/978-1-4612-2908-7_4.

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2

Eerens, J. P. J., K. B. Miller, H. S. Easton, R. J. Lucas, and J. G. H. White. "Endophyte (Neotyphodium lolii) Effect on Parturition Date in Sheep." In Neotyphodium/Grass Interactions, 417–19. Boston, MA: Springer US, 1997. http://dx.doi.org/10.1007/978-1-4899-0271-9_65.

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3

van Zijll de Jong, Eline, Nathaniel R. Bannan, Jacqueline Batley, Kathryn M. Guthridge, German C. Spangenberg, Kevin F. Smith, and John W. Forster. "Genetic Diversity in the Perennial Ryegrass Fungal Endophyte Neotyphodium lolii." In Developments in Plant Breeding, 155–64. Dordrecht: Springer Netherlands, 2004. http://dx.doi.org/10.1007/1-4020-2591-2_14.

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4

Dracatos, Peter, Jeremy Dumsday, Alan Stewart, Mark Dobrowolski, Noel Cogan, Kevin Smith, and John Forster. "Genetic Diversity in Australasian Populations of the Crown Rust Pathogen of Ryegrasses (Puccinia coronata f.sp. lolii)." In Molecular Breeding of Forage and Turf, 1–10. New York, NY: Springer New York, 2008. http://dx.doi.org/10.1007/978-0-387-79143-2_25.

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5

Dracatos, Peter, Jeremy Dumsday, Alan Stewart, Mark Dobrowolski, Noel Cogan, Kevin Smith, and John Forster. "Genetic Diversity in Australasian Populations of the Crown Rust Pathogen of Ryegrasses (Puccinia coronata f.sp. lolii)." In Molecular Breeding of Forage and Turf, 275–84. New York, NY: Springer New York, 2009. http://dx.doi.org/10.1007/978-0-387-79144-9_25.

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6

"Loline." In Natural Compounds, 543. New York, NY: Springer New York, 2013. http://dx.doi.org/10.1007/978-1-4614-0560-3_1053.

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7

COLE, RICHARD J., BRUCE B. JARVIS, and MILBRA A. SCHWEIKERT. "Loline Alkaloids." In Handbook of Secondary Fungal Metabolites, 525–43. Elsevier, 2003. http://dx.doi.org/10.1016/b978-012179460-6/50289-3.

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8

"Loling Formation." In Geological Formation Names of China (1866–2000), 670. Berlin, Heidelberg: Springer Berlin Heidelberg, 2009. http://dx.doi.org/10.1007/978-3-540-93824-8_4735.

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9

"lolit m." In Wörterbuch GeoTechnik/Dictionary Geotechnical Engineering, 591. Berlin, Heidelberg: Springer Berlin Heidelberg, 2013. http://dx.doi.org/10.1007/978-3-642-33335-4_90534.

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10

Stefanelli, Diego. "VIII. De Lollis comparatista." In Cesare De Lollis tra filologia romanza e letterature comparate, 271–301. Ledizioni, 2018. http://dx.doi.org/10.4000/books.ledizioni.5336.

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Тези доповідей конференцій з теми "LOLbin":

1

Murer, Martin, Ilhan Aslan, and Manfred Tscheligi. "LOLLio." In the 7th International Conference. New York, New York, USA: ACM Press, 2013. http://dx.doi.org/10.1145/2460625.2460675.

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Bento, Antonio Carlos, Jose Carmino Gomes, Ellen Martins Lopes da Silva, and Marcelo Galdino. "An Applayed Survey with ESP8266 Lolin + Shield Base with Nextion Touchscreen Display." In 2021 IEEE 11th Annual Computing and Communication Workshop and Conference (CCWC). IEEE, 2021. http://dx.doi.org/10.1109/ccwc51732.2021.9375924.

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3

Oñate-Angulo, Guillermo, Joaquín Arroyo-Cabrales, Marisol Montellano Ballesteros, and Alfonso Valiente-Banuet. "EXCAVATIONS AND FOSSIL COLLECTIONS FROM TLAPACOYA AND LOLTUN CAVES, MEXICO." In GSA Annual Meeting in Indianapolis, Indiana, USA - 2018. Geological Society of America, 2018. http://dx.doi.org/10.1130/abs/2018am-317818.

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4

Zuleika, T., and R. Tobing. "Analyzing French Onomatopoeia in Webtoon ‘Wonderwall’ by Sena Loli." In Proceedings of 1st Workshop on Environmental Science, Society, and Technology, WESTECH 2018, December 8th, 2018, Medan, Indonesia. EAI, 2019. http://dx.doi.org/10.4108/eai.8-12-2018.2283896.

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