Relevant bibliographies by topics / Arctiin

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Academic literature on the topic 'Arctiin'

Author: Grafiati
Published: 4 June 2021
Last updated: 12 February 2022

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Journal articles on the topic "Arctiin"

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Zhou, Xiaoying, Haoke Zhang, Liang Ge, Haiyan Gong, and Shuge Tian. "Determination of Arctiin and Arctigenin Contents inArctium TomentosumMill. by HPLC Method." E-Journal of Chemistry 8, s1 (2011): S372—S376. http://dx.doi.org/10.1155/2011/517681.

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A simple, precise, rapid and accurate, binary-phase high performance liquid chromatographic method has been developed for the determination of arctiin and arctigenin contents in theArctium tomentosumMill. with short run time. Chromatographic separation was achieved by using HPLC system, consisting of a Shimadzu LC-6AD and Kromasil C18column (250×4.6 mm, 5 μm, with pre-column), the mobile phase consists of methanol and water (55: 45). Detection wavelength was 280 nm. The speed of flow was 1.0 mL/min. The specimen handing quantity was 10 μL. The arctiin’s linearity range was 1.575∼4.725 μg (r=0.9995). The arctigenin’s linearity range was 0.613, 3.063 μg (r = 0.9998) and the linear relationship was accurate. The average recovery (n=5) of arctiin and arctigenin were 101.55% (RSD=2.23%) 101.63% (RSD =1.49 %) respectively. The contents of arctiin and arctigenin inArctium tomentosumMill. were 10.69 mg/g and 0.15 mg/g, respectively. Therefore， the developed HPLC method can be applied to bothin vitrostudies of arctiin and arctigenin formulations as well as drug estimation in biological samples.
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Zhou, Xiaojing, Haixing Liu, and Lintong Wang. "Determination of Arctiin in Fructus Arctii by Capillary Electrophoresis." IOP Conference Series: Materials Science and Engineering 772 (March 31, 2020): 012032. http://dx.doi.org/10.1088/1757-899x/772/1/012032.

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Zhou, Yuyan, Li Xia, Weiqiang Yao, Jun Han, and Guodong Wang. "Arctiin Antagonizes Triptolide-Induced Hepatotoxicity via Activation of Nrf2 Pathway." BioMed Research International 2020 (October 16, 2020): 1–10. http://dx.doi.org/10.1155/2020/2508952.

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Triptolide (TP) is the most effective ingredient found in the traditional Chinese herbal Tripterygium wilfordii Hook F, and it is widely used in therapies of autoimmune and inflammatory disorders. However, the hepatotoxicity induced by TP has restricted its use in clinical trials. Arctiin is known as a protective agent against oxidative stress, and it exerts liver-protecting effect. This study was aimed at investigating the protective role of arctiin against TP-induced hepatotoxicity using in vitro and in vivo models. The results indicated that TP not only obviously induced liver injury in mice but also significantly inhibited the growth of HepG2 cells and increased the level of intracellular reactive oxygen. Furthermore, TP obviously decreased the expressions of proteins of Nrf2 pathway including HO-1, NQO1, and Nrf2 associated with oxidative stress pathway. However, the above experimental indexes were reversed by the treatment of arctiin. Our results suggested that arctiin could alleviate TP-induced hepatotoxicity, and the molecular mechanism is likely related to its capacity against oxidative stress.
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Shin, Hee Soon, Sun Young Jung, Su Yeon Back, Jeong-Ryong Do, and Dong-Hwa Shon. "Arctigenin fromFructus Arctii(Seed of Burdock) Reinforces Intestinal Barrier Function in Caco-2 Cell Monolayers." Evidence-Based Complementary and Alternative Medicine 2015 (2015): 1–7. http://dx.doi.org/10.1155/2015/368105.

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Fructus Arctiiis used as a traditional herbal medicine to treat inflammatory diseases in oriental countries. This study aimed to investigate effect ofF. Arctiiextract on intestinal barrier function in human intestinal epithelial Caco-2 cells and to reveal the active component ofF. Arctii. We measured transepithelial electrical resistance (TEER) value (as an index of barrier function) and ovalbumin (OVA) permeation (as an index of permeability) to observe the changes of intestinal barrier function. The treatment ofF. Arctiiincreased TEER value and decreased OVA influx on Caco-2 cell monolayers. Furthermore, we found that arctigenin as an active component ofF. Arctiiincreased TEER value and reduced permeability of OVA from apical to the basolateral side but not arctiin. In the present study, we revealed thatF. Arctiicould enhance intestinal barrier function, and its active component was an arctigenin on the functionality. We expect that the arctigenin fromF. Arctiicould contribute to prevention of inflammatory, allergic, and infectious diseases by reinforcing intestinal barrier function.
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Liu, Xueying, Jian Wang, Peiyuan Dou, Xu Zhang, Xiaoku Ran, Linlin Liu, and Deqiang Dou. "The Ameliorative Effects of Arctiin and Arctigenin on the Oxidative Injury of Lung Induced by Silica via TLR-4/NLRP3/TGF-β Signaling Pathway." Oxidative Medicine and Cellular Longevity 2021 (July 17, 2021): 1–18. http://dx.doi.org/10.1155/2021/5598980.

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Silicosis remains one of the most serious diseases worldwide, with no effective drug for its treatment. Our research results have indicated that arctiin and arctigenin could increase the mitochondrial membrane potential, which in turn reduces the production of reactive oxygen species (ROS), blocks the polarization of macrophages, and inhibits the differentiation of myofibroblasts to reduce oxidative stress, inflammation, and fibrosis. Further, our study revealed that arctiin and arctigenin suppressed the activation of NLRP3 inflammasome through the TLR-4/Myd88/NF-κB pathway and the silica-induced secretion of TNF-α, IL-1β, TGF-β, and α-SMA. Besides, the silica-induced increase in the levels of serum ceruloplasmin and HYP was also inhibited. Results of metabolomics indicated that arctiin and arctigenin could regulate the abnormal metabolic pathways associated with the development of silicosis, which involve pantothenate and CoA biosynthesis, cysteine and methionine metabolism, linoleic acid metabolism, and arginine and proline metabolism successively. Furthermore, the analysis of metabolomics, together with network topological analysis in different phases of silicosis, revealed that urine myristic acid, serum 4-hydroxyproline, and L-arginine could be regarded as diagnosis biomarkers in the early phase and formation of pulmonary fibrosis in the latter phases of silicosis. Arctiin and arctigenin could downregulate the increased levels of myristic acid in the early phase and serum 4-hydroxyproline in the latter phase of silicosis. Interestingly, the integration of TLR-4/NLRP3/TGF-β signaling and metabolomics verified the importance of macrophage polarization in the silicosis fibrosis process. To the best of our knowledge, this is the first study reporting that arctiin and arctigenin both can ameliorate silicosis effectively, and the former is a little stronger than its aglycone arctigenin because of its high oral bioavailability, low toxicity, and multimolecular active metabolites as determined by AdmetSAR and molecular docking analysis.
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Könye, Rita, Ágnes Evelin Ress, Anna Sólyomváry, Gergő Tóth, András Darcsi, Balázs Komjáti, Péter Horváth, et al. "Enzyme-hydrolyzed Fruit of Jurinea mollis: A Rich Source of (-)-(8R,8′R)-Arctigenin." Natural Product Communications 11, no. 10 (October 2016): 1934578X1601101. http://dx.doi.org/10.1177/1934578x1601101011.

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In Jurinea mollis fruit, the dibenzylbutyrolactone-type lignan glycoside arctiin and its aglycone arctigenin were determined for the first time using a combination of optimized enzymatic treatment and complementary spectrometric (HPLC-MS, GC-MS) and spectroscopic (CD and NMR) methods. Analysis of separated fruit parts, i.e., the fruit wall and embryo, demonstrated the specific accumulation of arctiin, since it was exclusively found in the embryo. Arctiin in the embryo samples (71.5 mg/g) was found to be quantitatively converted into arctigenin (50.7 mg/g) by endogenous enzymatic hydrolysis, resulting in one of the highest arctigenin-containing plant tissues reported to date and allowing the selective isolation of arctigenin by our recently reported three-step isolation method. The absolute configuration of the isolated arctigenin was determined to be (-)-(8 R,8′ R). Conformational analysis of arctigenin was also performed, resulting in three major low energy conformations.
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Ryu, Shi Yong, Jong Woong Ahn, Young Hwa Kang, and Byung Hoon Han. "Antiproliferative effect of arctigenin and arctiin." Archives of Pharmacal Research 18, no. 6 (December 1995): 462–63. http://dx.doi.org/10.1007/bf02976353.

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Teixeira, Renan S., Paulo H. D. Carvalho, Jair A. K. Aguiar, Valquíria P. Medeiros, Ademar A. Da Silva Filho, and Jorge W. L. Nascimento. "Improved Method for Obtaining of Arctigenin from Arctium Lappa L. and its Antiproliferative Effect on Human Hepatocarcinoma HepG2 Cells." Current Bioactive Compounds 16, no. 3 (June 10, 2020): 358–62. http://dx.doi.org/10.2174/1573407214666181115124223.

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Background: Arctigenin is a lignan found in Arctium lappa L. (Asteraceae) that displays anti-inflammatory activities. Previous studies showed that the crude extract of A. Lappa has antitumor activity in human liver carcinoma, lung and stomach cancer cells. The aim of this study was to obtain arctigenin from A. lappa L., as well as to evaluate its antiproliferative effects in cells of liver carcinoma (HepG2) and fibroblasts (NIH/3T3). Methods: Arctigenin was obtained from the hydrolysis of arctiin, which was isolated from the crude extract of A. lappa. The effects of arctigenin and arctiin on HepG2 cell viability and cell adhesion were analyzed by MTT method. Adhesion assay was also carried out to evaluate the antitumor activity. Results: Our results showed that the analytical process to obtain arctigenin was fast and easy. In vitro experiments showed that arctigenin (107-269 μM) decreased HepG2 cells viability and did not cause cytotoxicity on NIH/3T3 cells. Arctigenin (27-269 μM) demonstrated anti-adhesion in HepG2 cells in a concentration-dependent manner, when compared with control. Conclusion: These results suggest a promising pharmacological activity for arctigenin as an antiproliferative compound.
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Wu, Jian-Guo, Jin-Zhong Wu, Lian-Na Sun, Ting Han, Jian Du, Qi Ye, Hong Zhang, and Yu-Guang Zhang. "Ameliorative effects of arctiin from Arctium lappa on experimental glomerulonephritis in rats." Phytomedicine 16, no. 11 (November 2009): 1033–41. http://dx.doi.org/10.1016/j.phymed.2009.04.005.

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Tundis, R., G. Statti, F. Menichini, and F. Delle Monache. "Arctiin and onopordopicrin from Carduus micropterus ssp. perspinosus." Fitoterapia 71, no. 5 (September 2000): 600–601. http://dx.doi.org/10.1016/s0367-326x(00)00203-3.

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Dissertations / Theses on the topic "Arctiin"

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Dias, Mirna Meana. "Avaliação da atividade esquistossomicida in vitro do extrato hidroalcoólico bruto e metabólitos secundários dos frutos da Arctium lappa L. (Asteraceae)." Universidade Federal de Juiz de Fora (UFJF), 2013. https://repositorio.ufjf.br/jspui/handle/ufjf/5455.

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FAPEMIG - Fundação de Amparo à Pesquisa do Estado de Minas Gerais
A esquistossomíase, causada por parasitos do gênero Schistosoma, é uma doença que afeta cerca de 240 milhões de pessoas no mundo. O Praziquantel é o fármaco de escolha para o tratamento desta parasitose e, devido principalmente aos casos de resistência do parasito a esta medicamento, se faz necessária a busca de novas moléculas e/ou protótipos com potencial atividade esquistossomicida. Neste contexto, a pesquisa com produtos naturais desponta como uma alternativa para o descobrimento de novos fármacos para o tratamento da esquistossomíase. Entre as espécies vegetais de interesse para a produção de substâncias esquistossomicidas, destaca-se a Arctium lappa L. (Asteraceae), a qual é reconhecida por biossintetizar lignóides, classe de metabólitos que tem demonstrado grande potencial esquistossomicida. O presente trabalho descreve o estudo fitoquímico do extrato hidroalcoólico dos frutos de A. lappa, bem como a avaliação da atividade esquistossomicida in vitro, frente aos vermes adultos de S. mansoni, do extrato e de seus metabólitos majoritários. O estudo fitoquímico de A. lappa L. resultou no isolamento de duas lignanas dibenzilbutirolactônicas, a arctiina e arctigenina. A análise dos resultados de avaliação esquistossomicida obtidos demonstrou que o extrato hidroalcoólico bruto na concentração de 200 mg/mL apresentou expressiva atividade esquistossomicida in vitro, sendo capaz de provocar a morte de 100% dos parasitos em até 24 horas de incubação. A arctiina, metabólito majoritário purificado do extrato, foi capaz de matar e provocar lesões tegumentares em 100% dos vermes adultos. Os resultados obtidos sugerem que a atividade esquistossomicida in vitro demonstrada pelo extrato hidroalcoólico pode estar relacionada à presença da arctiina, corroborando com o potencial esquistossomicida in vitro das lignanas dibenzilbutirolactônicas, frente aos vermes adultos de S. mansoni.
Schistosomiasis caused by the Schistosoma parasite is a disease that affects about 240 million people around the world. Praziquantel is the chosen drug for the treatment of this parasitosis. It is imperative to search for new molecules and / or prototypes with potential schistosomicidal activity. This requirement is due to the tough performance of the parasite against this medicine. In this context, the research with natural products has been recognized as an alternative to discover new pharmacos for Schistosoma treatment. Arctium lappa L. (Asteraceae) stands out among vegetal plants of interest for the production of schistosomicidal substances. This is recognized for being able to biosynthesize lignoid, a kind of metabolite that has performed great schistosomicidal potential. This master thesis describes the phytochemical study of the hydroalcoholic extract from A. lappa L. fruit, as well the evaluation of the schistosomicidal activity evaluation in vitro, facing the adult worms of S. mansoni from the extract and from its majority metabolite. The phytochemical study of A. lappa L. resulted in the isolation of two dibenzyl butyrolactone lignan, a arctiin e arctigenin. The results obtained schistosomicidal evaluation showed that hydroalcoholic extract crude in concentration of 200 mg/mL showed significant antischistosomal activity in vitro and is capable of causing the death of the 100% of the parasites within 24 hours of incubation. The arctiin a major purified metabolite from the extract, was capable of killing by causing tegumentary lesions en 100% of the adult worms. The obtained results suggest that the schistosomicidal activity in vitro showed by the hydroalcoholic extract can be related to arctiin presence, supporting the potencial schistosomicidal in vitro of dibenzyl butyrolactone lignan, against the adult worms of S. mansoni.
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Saço, Luana Carla. "Avaliação do potencial esquistossomicida da arctiina, extraída de Arctium lappa L." Universidade Federal de Juiz de Fora (UFJF), 2015. https://repositorio.ufjf.br/jspui/handle/ufjf/3116.

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CAPES - Coordenação de Aperfeiçoamento de Pessoal de Nível Superior
A esquistossomíase é considerada uma das doenças tropicais negligenciada mais significativa no mundo. Sendo que a presença de apenas um medicamento para o tratamento da infecção leva a busca por novos compostos esquistossomicidas, utilizando os produtos naturais como uma das principais fontes destas novas moléculas. Neste sentido, a lignana Arctiina extraída da espécie Arctium lappa, cujas funções anti-inflamatórias e antiproliferativas já foram descritas na literatura, se tornou alvo do nosso estudo. O nosso propósito foi pesquisar a sua ação esquistossomicida através de testes in vitro e em modelo murino. A substância foi utilizada nas concentrações de 30, 60, 120 e 240 µg/mL nos ensaios in vitro. Após o período de incubação, em nenhuma das concentrações, a molécula foi capaz de promover modificação na viabilidade do parasito em cultura quando comparado ao grupo controle. Após a administração por via intraperitoneal, para verificar a presença da substância no plasma murino, foi realizada uma análise cromatográfica. A análise da amostra de arctiina pura, diluída em metanol, e diluída em plasma murino não tratado mostrou um pico no cromatograma medido a 254 nm, com retenção de 5 minutos. A amostra de plasma animal coletada após uma hora de tratamento com arctiina, sob as mesmas condições experimentais, revelou um pico semelhante ao da amostra pura, confirmando que a arctiina está disponível no plasma após administração. Os testes in vivo, foram realizados em camundongos fêmeas da linhagem Swiis que receberam por via intraperitoneal duas dosagens de arctiina (50 mg/kg), sendo a primeira administrada 20 dias após a infecção e a segunda após duas semanas. Nos parâmetros analisados: peso hepático, leucometria global, redução da carga parasitária e alteração no oograma, não foi verificado nenhuma alteração significativa em relação aos parâmetros encontrados no grupo controle infectado, tratado com praziquantel (200 mg/kg) e Dimetilsulfóxido (0,5%). O resultado mais promissor foi uma redução das médias das áreas dos granulomas, a administração da arctiina provocou uma redução em torno de 20% em comparação com o controle infectado. Mais estudos devem ser realizados a fim de verificar o possível mecanismo de atuação sobre os componentes inflamatórios presentes na formação do granuloma.
Schistosomiasis is one of the most significant neglected tropical diseases in the world. Only one drug is currently available for the treatment and control of schistosomiasis, therefore there is an urgent need for the development of new schistosomicide compounds, being natural products an important source of these molecules. Hence, in this work we studied the lignan arctiin extracted from Arctium lappa species, whose anti-inflammatory and antiproliferative functions have been previously described. Our aim was to investigate in vitro and in vivo its schistosomicidal activity. We tested the compound in vitro at the follow concentrations 30, 60, 120 and 240 ug/ml. There was no difference in all tested concentrations in the viability of the parasite in the culture after the incubation when compared to the control group. In addition we verified the plasmatic concentration of arctiin after intraperitoneal administration in mice by chromatographic analysis. The analysis of pure arctiin diluted in either methanol or mouse plasma showed a peak in the chromatogram at retention time of 5 minutes, absorbance was measured at 254 nm. Animal plasma sample collected one hour after treatment with arctiin was analyzed under same experimental conditions and revealed a similar peak, confirming the availability of arctiin in the plasma following administration. The in vivo tests were performed in Swiss female mice, those were intraperitoneally injected with two dosages of arctiin (50 mg/kg) - the first administered 20 days after infection and the second two weeks later. The follow parameters were analyzed: liver weight, white blood cell count, parasitic load and oogram. We did not find any significant change in those parameters comparing infected control groups treated either with praziquantel (200 mg / kg) or dimethyl sulfoxide (0.5 %) to the group treated with arctiin. The most promising result was the reduction around 20% of the average area of the granuloma in the arctiin group compared with the infected control. More studies are needed to verify possible mechanisms of action of this molecule in inflammatory components that play a role in granuloma formation.
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Moraes, Simeão de Souza. "Análise cladística da subtribo Pericopina e revisão taxonômica de Dysschema Hübner, 1818 (Lepidoptera, Erebidae, Arctiinae, Arctiini)." Universidade de São Paulo, 2014. http://www.teses.usp.br/teses/disponiveis/41/41133/tde-11072014-103044/.

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A subtribo Pericopina (Lepidoptera: Erebidae: Arctiinae: Arctiini) compreende 37 gêneros com distribuição exclusivamente Neotropical. Estudos acerca da taxonomia e relações filogenéticas para esse grupo são escassos. Entre os gêneros arrolados em Pericopina, Dysschema Hübner, 1818 é o mais especioso. O gênero é representado por 146 nomes válidos e 88 espécies, conta com 12 sinonímias genéricas e não há um consenso sobre o número de espécies que o compõem, uma vez que há suspeita por parte de alguns autores (WATSON & GOODGER 1986; LAMAS & GRADOS 1996) de que alguns nomes atualmente válidos para algumas espécies sejam, de fato, sinonímias. Recentemente Becker (2013) estabeleceu uma série de sinônimos, e o gênero passou a somar 59 espécies. O presente trabalho propõe, através do levantamento de caracteres morfológicos de adultos, analisar as relações filogenéticas de Pericopina e das espécies arroladas em Dysschema, atualizar a distribuição das espécies atualmente arroladas no gênero, além de uma melhor delimitação taxonômica. A análise cladística baseada em 156 caracteres morfológicos não corroborou a monofilia da subtribo Pericopina; o gênero Scearctia Hering se mostrou morfologicamente associado à Lithosiini e o gênero Pteroodes Butler se mostrou morfologicamente associado à Phaegopterina. Esses gêneros são realocados nos grupos supragenéricos anteriormente citados, com os quais mostraram maior afinidade filogenética, como taxonomicamente incertae sedis. Adicionalmente o gênero Seileria Dognin é aqui considerado sinônimo junior subjetivo de Thyrgis Walker A monofilia de Dysschema é corroborada apenas com a inclusão dos gêneros monotípicos Sermyla Walker e Are Walker. São descritas quatro novas espécies em Dysschema, 14 novos sinônimos estabelecidos, nove espécies revalidadas, oito sinônimos revalidados e duas combinações novas. Pericopis thyridia é um nome novo proposto em substituição a Pericopis fenestrata Butler, 1872, homônimo júnior de Coborisa fenestrata Walker, 1855. Para garantir a estabilidade taxonômica dos nomes arrolados em Dysschema foram designados 67 lectótipos e fixados 19 holótipos por evidência de monotipia
Pericopina (Lepidoptera: Erebidae: Arctiinae: Arctiini) comprises 37 genera distributed exclusively in the Neotropical region. Studies on the taxonomy and phylogenetic relationships for the species included in this group are scarce. Among the genera enrolled in Pericopina, Dysschema Hübner, 1818 is the most specious genus. The genus is represented by 146 valid names and 88 species, Dysschema has 12 generic synonyms and there is no consensus on the number of species that compose it, as it is suspected by some authors (Watson & Goodger 1986; Lamas & Grados1996) based on that currently valid names for some species are, in fact, synonyms. Recently Becker (2013) introduced several synonyms and the genus currently has 59 species . The present study proposes, through a survey of morphological characters of adults, to analyze the phylogenetic relationships of Pericopina and of the species enrolled in Dysschema, to update the distribution of the species currently enrolled in this genus, and a better taxonomic delimitation. A cladistic analysis based on 156 morphological characters did not corroborate the monophyly of Pericopina. Scearctia Hering is morphologicaly associated to the Lithosiini and Pteroodes Butler is morphologicaly associated to the Phaegopterina. These genera are enrroled in the supra-generic groups which their share phylogenetics afinities as taxonomically incertae sedis. Aditionally, Seileria Dognin is a junior subjective synonym of Thyrgis Walker. The monophyly of Dysschema was supported only with the inclusion of the monotypic genera Sermyla Walker and Are Walker. Four new species are described in Dysschema, 14 new synonyms are established, nine species are revalidated, eight synonyms are revalidated and two new combinations are established. Additionally, Pericopis thyridia is a new name proposed to replace the Pericopis fenestrata Butler, 1872, a junior homonym of Coborisa fenestrata Walker, 1855. In order to assure the estability of the names enrroled in Dysschema 67 lectotypes were designated and 19 holotypes were fixed by evidence of monotypy
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Pinheiro, Lívia Rodrigues. "Análise cladística e revisão de Heliura Butler, com notas sobre Delphyre Walker e Eucereon Hübner (Lepidoptera, Erebidae, Arctiinae, Arctiini, Ctenuchina)." Universidade de São Paulo, 2014. http://www.teses.usp.br/teses/disponiveis/41/41133/tde-17042014-122644/.

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O gênero Heliura Butler contava, no início deste trabalho, com 53 nomes e 40 espécies válidas. Foi realizada uma análise cladística com o intuito de testar o monofiletismo do gênero e construir uma hipótese de relações filogenéticas entre suas espécies. A análise mostrou que o conceito prévio de Heliura era polifilético, o que também se revelou verdadeiro para todos os gêneros estudados que tiveram mais de uma espécie incluída nas análises. Este gênero, como aqui redefinido, é composto por 66 espécies no sensu stricto, dentre as quais 16 são espécies novas, e 76 no sensu lato (incluindo as espécies incertae sedis). Tal rearranjo conta com dois novos sinônimos para Heliura, Ptychotricos Schaus, sin. nov. e Mesocerea Hampson, sin. nov. Todas as espécies que pertencem a Heliura no senso revisado foram redescritas e ilustradas, e tiveram sua distribuição geográfica mapeada. As demais foram realocadas de acordo com o que foi possível apurar a respeito de suas relações filogenéticas. Dentre as que foram realocadas com sucesso, estão Eucereon baleris Dyar, comb. nov. e Pseudaethria cosmosomodes Dognin, comb. nov. Dois gêneros novos são criados para realocar outras espécies que não pertencem a Heliura: Bus, gen. nov. e Dus, gen. nov. Entretanto, não foi possível realocar todas elas, de modo que as demais receberam o status de incertae sedis. Onze novos sinônimos foram descobertos: Heliura cadroe Schaus (= Acridopsis lucis Butler), Pseudaethria cessogae Schaus (= Heliura cosmosomodes Dognin), Pseudohyaleucerea manicorensis Rego Barros & Machado (= Heliura quadriflavata Kaye), Delphyre nilammon Schaus (= Eucereon inconspícua Kaye), Heliura klagesi meridionalis Rothschild, Delphyre lemoulti Draudt (= Neacerea rhodocrypta Druce), Automolis oviplaga Rothschild (= Delphyre subapicalis Dukinfield-Jones), Theages quadricolor Walker, Eucereon quadricolor boreale Rothschild e E. quadricolor meridionale Rothschild (estes três = Chelonia punctata Guérin-Meneville) e Eucereon tigrisoma Rothschild (= Galethalea pica Walker). Outras duas espécies também tratadas aqui em Heliura, H. pierus Cramer e H. dares Cramer, são declaradas species inquirendae. Heliura distincta Rothschild passa a ser conhecida como Heliura rothschildi nom. nov., uma vez que ,Teucer distincta Rothschild, um ano mais antiga, também passa a fazer parte de Heliura. A combinação nova Heliura elongata (Schaus), comb. nov. é mais antiga que H. elongata Rothschild, e, portanto, este último nome passa a ser conhecido como H. umbrimaculodes nom. nov. São apresentadas notas sobre Delphyre Walker e Eucereon Hübner, com a revalidação de alguns de seus sinônimos (Neacerea Druce, gen. revalid. e Erithales Poey, gen. revalid.), além da criação de um gênero novo, Aus, gen. nov., para algumas espécies previamente alocadas em Delphyre. As identidades de Eucereon archias e E. punctatum são discutidas à luz de novas descobertas. Novas combinações são propostas em Galethalea Butler, Pseudohyaleucerea Rego Barros & Machado, Diabaena Felder, Pseudopharus Hampson, Eucereon Hübner e Rhipha Walker. Outras duas espécies novas são descritas, em Delphyre e Erithales. Lectótipos foram designados quando apropriado para todos os nomes descritos ou presumivelmente descritos a partir de mais de um espécime
The genus Heliura Butler had 53 names and 40 valid species at the beginning of this study. A cladistic analysis was performed to test its monophyletism, which results showed that it is polyphyletic, as well as all other genera included in the analysis and represented by more than one taxon. Heliura, as defined here, comprises 66 species in its sensu stricto, 16 of which are new, and 76 in its sensu lato (which includes incertae sedis species). This arrangement counts with two new synonyms for Heliura, Ptychotricos Schaus, sin. nov. e Mesocerea Hampson, sin. nov. All the species belonging to Heliura in the sense here defended were redescribed, illustrated and mapped. The other ones were rearranged according to the results obtained at the analysis. Among those successfully placed in genera already described are Eucereon baleris Dyar, comb. nov. and Pseudaethria cosmosomodes Dognin, comb. nov. Two new genera were created to place other species that do not belong in Heliura: Bus, gen. nov. and Dusi, gen. nov. However, it was not possible to place confidently all the species that do not belong in Heliura, and those which phylogenetic positions remain a mistery were given the status of incertae sedis. Eleven new synonyms were discovered: Heliura cadroe Schaus (= Acridopsis lucis Butler), Pseudohyaleucerea manicorensis Rego Barros & Machado (= Heliura quadriflavata Kaye), Delphyre nilammon Schaus (= Eucereon inconspicua Kaye), Heliura klagesi meridionalis Rothschild, Delphyre lemoulti Draudt (= Neacerea rhodocrypta Druce), Automolis oviplaga Rothschild (= Delphyre subapicalis Dukinfield-Jones), Theages quadricolor Walker, Eucereon quadricolor boreale Rothschild e E. quadricolor meridionale Rothschild (these three = Chelonia punctata Guérin-Meneville), and Eucereon tigrisoma Rothschild (= Galethalea pica Walker). Two other species here treated in Heliura were declared species inquirendae: H. Pierus Cramer and H. Dares Cramer. Heliura distinct Rothschild received a new name, Heliura rothschildi, nom. nov., because Teucer distinct Rothschild, which is one year older, is now also part of Heliura. At last, notes on Delphyre Walker and Eucereon Hübner are provided, with the revalidation of some of its synonyms (Neacerea Druce, gen. revalid. and Erithales Poey, gen. revalid.), plus the creation of a new genus, Aus, gen. nov., for some species previously placed in Delphyre. The identities of Eucereon archias and E. Punctatum are discussed based on new evidence. New combinations are proposed in Galethalea Butler, Pseudohyaleucerea Rego Barros & Machado, Diabaena Felder, Pseudopharus Hampson, Eucereon Hübner, and
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Turkel, Joel A. (Joel Abram) 1969. "Arctic house." Thesis, Massachusetts Institute of Technology, 1999. http://hdl.handle.net/1721.1/70314.

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Thesis (M. Arch.)--Massachusetts Institute of Technology, Dept. of Architecture, 1999.
Includes bibliographical references (p. 67-[69]).
Currently available housing in the Arctic is limited to solutions that have been adapted from designs for less severe climates. This thesis has developed a new manner of residential construction designed specifically for the Arctic climate and culture. The system invented ensures a variety of building options for traditional cultural requirements, while also improving on the level of amenity expected of contemporary dwellings. It has developed a sustainable and responsible building system that represents definite and quantifiable improvements through the use of appropriate technologies.
by Joel A. Turkel.
M.Arch.
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Dwyer, William G. "The evolving Arctic: current state of U.S. Arctic policy." Thesis, Monterey California. Naval Postgraduate School, 2013. http://hdl.handle.net/10945/37620.

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The Arctic environment is in a state of flux and the U.S. government must be prepared to handle the evolution and capitalize on the opportunities. Once barren and desolate, the Arctic is slowly coming to life with industry and commerce brought about by receding ice conditions. Along with that comes the need for a comprehensive and actionable Arctic policy. The other Arctic nations that ring the North Pole are quickly adapting to the shifting Arctic. Unlike the U.S., they have established Arctic policies, are implementing plans to operate in the region, and taking advantage of the opportunities that this new frontier has to offer. The U.S. framework is the National Strategy for the Arctic Region. The plan is short on detail and aspirational in nature. It lacks clear direction and authority. The U.S. has yet to commit to its role as an Arctic nation. The U.S. Arctic lacks infrastructure such as a deep-water port, a joint military base, and additional heavy icebreaker assets. Additionally, there is no lead agency that has authority and funding to carry out U.S. Arctic objectives. Under the current state of affairs, the U.S. is vulnerable to security, economic, and sovereignty issues in the Arctic.
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Dormoy, Thomas Gerard. "Arctic Coastal Erosion." Thesis, Norges teknisk-naturvitenskapelige universitet, Institutt for bygg, anlegg og transport, 2014. http://urn.kb.se/resolve?urn=urn:nbn:no:ntnu:diva-27046.

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With the recent increase of interest in Arctic, the need rises for new tools for understanding the typical mechanisms of this very unique and so vulnerable area. The coast, which concentrates nearly all of the human activities, is in the front line and probably the most critical part of the system. Trough the past decades, mappings of the Arctic’s shorelines point out huge erosion rates and show the threat of a climate change upon the coast. Recent studies seem to link those tremendous moves to the annual thermal variations within the soil. However, the mechanisms of thermal abrasion that are suggested to be at the hearth of the process are not yet completely understood.In answer for the need of numerical models for thermal analysis of the erosion process, this thesis proposes a toolbox specially designed, based on literature review and fieldwork data. Trough the chapters, the reader shall find essential tools for estimations of the heat transfer into a soil and complete understanding of the physical mechanisms behind. Critical parameters that influence the erosion process are highlighted. To assess the operational deployment of those tools, a thermal analysis of a site has been performed. The conclusions demonstrate the capacity of numerical models to underline the critical gears of the heat transfers, and hopefully will help understanding the erosion processes of this particular place.
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Elrod, Jonah Lloyd. "Lilliputian Arctic deviation." Diss., University of Iowa, 2018. https://ir.uiowa.edu/etd/3251.

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Lilliputian Arctic Deviation is a work for small orchestra inspired by average snow and ice extent in the Northern Hemisphere over four decades. Something so large as forty years of snow and ice coverage can be interpreted as what Timothy Morton calls a hyperobject, an entity so vast in space and time that we as human beings cannot experience it within our limited senses and lifespans. For example, we can’t experience 150 years of global warming directly, but we can conceptualize it as an idea, or observe it as a graph. Like a graph, Lilliputian Arctic Deviation is an attempt to experience a hyperobject, while also allowing the composer free rein to creatively interpret and comment on the hyperobject. The Rutgers University Global Snow Lab records weekly and monthly snow extent averages for the Northern Hemisphere from 1967 until the present day. Lilliputian Arctic Deviation focuses on the summer yearly averages. Certain characteristics of the data, when graphed, show patterns that have both scientific and, after translation through algorithmic processes, musical significance. These characteristics are: 1. A significant decline in average snow extent from 1967 to the present; and 2. A transition from drastic yearly differences in the late 1960s through early 1990s to more consistent and predictable values in the late 1990s to 2015. Lilliputian Arctic Deviation proceeds in chronological order, starting with 1967 and ending with 2015. The density of the musical texture reflects the shape of the graph. Higher yearly averages involve more instruments sounding simultaneously, and lower yearly averages involve fewer instruments. Similar yearly average data values are reflected through shared musical materials; the range under which data points are located have similar characteristics. I group the data into eight regions: 3–3.9, 4–4.9,…10–10.9. Data points falling within a similar region share motivic, melodic, harmonic, and timbral materials. Other musical aspects of the piece reflect summer’s place within the larger hyperobject that includes all four seasons. The general characteristics of fall, winter, and spring are implied through listening to the summer, Lilliputian Arctic Deviation. Generally, Lilliputian Arctic Deviation features sharp articulated sounds of short duration, while sustained pitches are dynamically soft and fade in and out of the overall texture. Certain timbres are tight and subdued, such as a prevalence of muted brass, pizzicato and col legno battuto in the strings, and the use of wooden percussion. Set class (014) is used exclusively throughout the piece and is reflective of the small amount of snow and ice in the Northern Hemisphere respective to the amount found in the winter. Finally, since this process of the Earth has been and will continue to happen long before and after the years featured in this piece, this musical composition serves as an interpretation of a small fraction of the overall process, a hyperobject well beyond our ability to experience in our lifetimes.
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Stein, Dylan. "An Arctic Adaptation." University of Cincinnati / OhioLINK, 2019. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1554120044753592.

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Brown, David E., and Elizabeth Makings. "Arctic-Boreal Grasslands." University of Arizona (Tucson, AZ), 2014. http://hdl.handle.net/10150/622015.

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Books on the topic "Arctiin"

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Kirti, Jagbir S. Arctiid moths of India. New Delhi: Nature Books India, 2015.

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Miller, Debbie S. Arctic lights, arctic nights. New York: Walker & Co., 2003.

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Daniel, Moreton, ed. Arctic winter, arctic summer. New York: Scholastic, 1998.

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Mack, Lorrie. Arctic. London: Dorling Kindersley Limited, 2008.

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Vermeer, Jan. Arctic. Deventer: Thieme Art, 2008.

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Mack, Lorrie. Arctic. London: DK, 2007.

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1940-, Oliver Tony, ed. Arctic odyssey: Travelling Arctic Europe. Swindon, Wiltshire: Crowood Press, 1991.

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Arctic wolf: The high arctic. New York, NY: Bearport Pub., 2011.

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Indriðason, Arnaldur. Arctic Chill. London: Random House Publishing Group, 2009.

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Galgut, Damon. Arctic summer. London: Atlantic Books, 2015.

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Book chapters on the topic "Arctiin"

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Hangay, George, Severiano F. Gayubo, Marjorie A. Hoy, Marta Goula, Allen Sanborn, Wendell L. Morrill, Gerd GÄde, et al. "Arctics." In Encyclopedia of Entomology, 265. Dordrecht: Springer Netherlands, 2008. http://dx.doi.org/10.1007/978-1-4020-6359-6_10329.

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Wagner, Hildebert, Rudolf Bauer, Dieter Melchart, and Anton Staudinger. "Fructus Arctii – Niubangzi." In Chromatographic Fingerprint Analysis of Herbal Medicines Volume IV, 19–26. Cham: Springer International Publishing, 2016. http://dx.doi.org/10.1007/978-3-319-32328-2_3.

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Stuart Chapin, F., and Gaius R. Shaver. "Arctic." In Physiological Ecology of North American Plant Communities, 16–40. Dordrecht: Springer Netherlands, 1985. http://dx.doi.org/10.1007/978-94-009-4830-3_2.

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De Smet, P. A. G. M. "Arctium Species." In Adverse Effects of Herbal Drugs 2, 141–46. Berlin, Heidelberg: Springer Berlin Heidelberg, 1993. http://dx.doi.org/10.1007/978-3-642-48906-8_9.

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Bährle-Rapp, Marina. "Arctium lappa." In Springer Lexikon Kosmetik und Körperpflege, 44. Berlin, Heidelberg: Springer Berlin Heidelberg, 2007. http://dx.doi.org/10.1007/978-3-540-71095-0_775.

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Bährle-Rapp, Marina. "Arctium majus." In Springer Lexikon Kosmetik und Körperpflege, 44. Berlin, Heidelberg: Springer Berlin Heidelberg, 2007. http://dx.doi.org/10.1007/978-3-540-71095-0_776.

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Bährle-Rapp, Marina. "Arctium Tomentosum." In Springer Lexikon Kosmetik und Körperpflege, 44. Berlin, Heidelberg: Springer Berlin Heidelberg, 2007. http://dx.doi.org/10.1007/978-3-540-71095-0_778.

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Mehlhorn, Heinz. "Spirocerca arctica." In Encyclopedia of Parasitology, 2542. Berlin, Heidelberg: Springer Berlin Heidelberg, 2016. http://dx.doi.org/10.1007/978-3-662-43978-4_4344.

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Mehlhorn, Heinz. "Linguatula arctica." In Encyclopedia of Parasitology, 1481. Berlin, Heidelberg: Springer Berlin Heidelberg, 2016. http://dx.doi.org/10.1007/978-3-662-43978-4_4726.

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Mehlhorn, Heinz. "Linguatula arctica." In Encyclopedia of Parasitology, 1. Berlin, Heidelberg: Springer Berlin Heidelberg, 2015. http://dx.doi.org/10.1007/978-3-642-27769-6_4726-1.

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Conference papers on the topic "Arctiin"

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Zhao, Meili, Zongbao Zhang, and Haixing Liu. "Determination of arctiin in Xiaoer Ganmaoning Heji by capillary electrophoresis." In 2ND INTERNATIONAL CONFERENCE ON FRONTIERS OF BIOLOGICAL SCIENCES AND ENGINEERING (FSBE 2019). AIP Publishing, 2020. http://dx.doi.org/10.1063/5.0000017.

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Feng, Yimin, Haixing Liu, and Lintong Wang. "Determination of arctiin in Xiaoer Jiebiao granules by capillary electrophoresis." In 2ND INTERNATIONAL CONFERENCE ON FRONTIERS OF BIOLOGICAL SCIENCES AND ENGINEERING (FSBE 2019). AIP Publishing, 2020. http://dx.doi.org/10.1063/5.0000019.

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Souza, Alan, Viviane Moreira, and Carlos Heuser. "ARCTIC." In the 2014 ACM symposium. New York, New York, USA: ACM Press, 2014. http://dx.doi.org/10.1145/2644866.2644872.

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Bain, Matthew. "Arctic fracture." In ACM SIGGRAPH 2008 posters. New York, New York, USA: ACM Press, 2008. http://dx.doi.org/10.1145/1400885.1401014.

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Xie, Feng, Mike Necci, Jon Lanz, Patrick O'Brien, Paolo de Guzman, and Eduardo Bustillo. "Arctic ice." In the Fourth Symposium. New York, New York, USA: ACM Press, 2014. http://dx.doi.org/10.1145/2633374.2642654.

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"High Arctic." In Planet Austria. Wien: Verlag der Österreichischen Akademie der Wissenschaften, 2009. http://dx.doi.org/10.1553/planetaustrias258.

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Berg, Tor Einar, and Joachim Bakke. "SS: Arctic: LNG STS Operations in Arctic Waters." In Offshore Technology Conference. Offshore Technology Conference, 2009. http://dx.doi.org/10.4043/20048-ms.

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Bergström, Martin, Bernt J. Leira, and Pentti Kujala. "Future Scenarios for Arctic Shipping." In ASME 2020 39th International Conference on Ocean, Offshore and Arctic Engineering. American Society of Mechanical Engineers, 2020. http://dx.doi.org/10.1115/omae2020-18166.

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Abstract Maritime activity in the Arctic is on the increase, driven by multiple factors including the development of Arctic natural resources, climate change, regulatory changes, improved technology and operations, national and international policies, infrastructure developments, fuel prices, and the global economy. This article aims to identify and analyze such change drivers and to discuss how these might influence the future of three specific segments of Arctic shipping: destination-Arctic shipping (operation between Arctic and non-Arctic locations), trans-Arctic shipping (operation between non-Arctic locations through Arctic waters), and Arctic cruising. The study finds that each considered segment of Arctic shipping is subject to a unique set of significant change drivers.
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Jokat, W., V. Buravsev, Y. Kristoffersen, and G. Uenzelmann-Neben. "Arctic '91: seismic investigations in the central arctic ocean." In 54th EAEG Meeting. European Association of Geoscientists & Engineers, 1992. http://dx.doi.org/10.3997/2214-4609.201410715.

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Sablok, Anil, Manoj Ramachandran, and Jang Whan Kim. "Disconnectable Arctic Spar." In OTC Arctic Technology Conference. Offshore Technology Conference, 2011. http://dx.doi.org/10.4043/22139-ms.

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Reports on the topic "Arctiin"

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Pobedonosceva, Veronika, and Galina Pobedonosceva. SUPPORT ZONES AS THE BASIS OF RUSSIAN POLICY IN ITS ARCTIC ZONE. Science and Innovation Center Publishing House, 2020. http://dx.doi.org/10.12731/2070-7568-2020-2-3-132-143.

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The article explores the mechanism of the so-called "support zones" and its use in the Arctic zone of Russia to determine its role as the basis of Russian politics and a catalyst for economic growth in the Arctic regions. The conclusion is drawn on the promotion of the use of “support zones” to strengthen Russian positions in the Arctic at a new qualitative level.
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Баттахов, Петр Петрович. ПРАВОВОЕ РЕГУЛИРОВАНИЕ СОЦИАЛЬНО-ЭКОНОМИЧЕСКИХ ОТНОШЕНИЙ В АРКТИЧЕСКОЙ ЗОНЕ. DOI CODE, 2021. http://dx.doi.org/10.18411/1815-1337-2021-11862.

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nomic progress of society. In this case, legal regulation creates favourable conditions and protects the rights of small indigenous northern peoples, that is, the local population, who live permanently in the Arctic zone. Separately, on the basis of this concept, the development of the economy and social sphere of the Arctic bloc as a whole is considered. The main strategic directions for the development of the Arctic and the current regulatory framework of the Russian Federation are being investigated. The author proposes to solve issues related to the socioeconomic problems of the Arctic through the adoption of comprehensive concepts and regulatory legal acts. The main conclusion of the work is to improve the regulatory framework through the adoption of a separate codified act.
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Tanis, Fred J. Arctic Optical. Fort Belvoir, VA: Defense Technical Information Center, September 1992. http://dx.doi.org/10.21236/ada258654.

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Bradley, Douglas A. Forging an Arctic Alliance: Canadian-U.S. JIATF-Arctic. Fort Belvoir, VA: Defense Technical Information Center, October 2010. http://dx.doi.org/10.21236/ada535574.

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Vilks, G. 14th Arctic Workshop: Arctic Land-Sea Interaction Abstracts. Natural Resources Canada/ESS/Scientific and Technical Publishing Services, 1985. http://dx.doi.org/10.4095/130024.

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Sackinger, W. M., M. O. Jeffries, M. C. Lu, and F. C. Li. Arctic ice islands. Office of Scientific and Technical Information (OSTI), January 1988. http://dx.doi.org/10.2172/6091444.

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Shuchman, R. A., R. G. Onstott, and C. C. Wackerman. Arctic Ice Studies. Fort Belvoir, VA: Defense Technical Information Center, February 1993. http://dx.doi.org/10.21236/ada268608.

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Larsen, Joan Nymand, and Gail Fondahl. Arctic Human Development Report. Nordic Council of Ministers, February 2015. http://dx.doi.org/10.6027/tn2014-567.

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Rusina, Tamara. Map of Arctic Ocean. Edited by Nikolay Komedchikov and Aleksandr Khropov. Entsiklopediya, April 2015. http://dx.doi.org/10.15356/dm2015-12-02-15.

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Morison, James H. Arctic Mixed Layer Dynamics. Fort Belvoir, VA: Defense Technical Information Center, September 2000. http://dx.doi.org/10.21236/ada609740.

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