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129 results for “LEM”
Рис. 2. ПоΛигон набΛюΑения за инΑивиΑуаΛьным повеΑением гренΛанΑского Λемминга, о. ВрангеΛя, июнь-август 1987 г. Fig. 2. Observation site to monitor individual behavior of the Greenland lemming, Wrangel Island, June–August 1987 in Territorial behaviour of the greenlandic lemming (Dicrostonyx groenlandicus Trail, 1823) on Wrangel Island
Рис. 2. ПоΛигон набΛюΑения за инΑивиΑуаΛьным повеΑением гренΛанΑского Λемминга, о. ВрангеΛя, июнь-август 1987 г. Fig. 2. Observation site to monitor individual behavior of the Greenland lemming, Wrangel Island, June–August 1987
Fig. 8 in Territorial behaviour of the greenlandic lemming (Dicrostonyx groenlandicus Trail, 1823) on Wrangel Island
Fig. 8. The dynamics of the average length of the run, the maximum distance from the burrow during the activity phase and an increase in the area of habitat of the young Greenland lemmings during the first 23 days after leaving the burrow
Рис. 5. ПроΑоΛжитеΛьность фаз активности и покоя ♀ гренΛанΑского Λемминга в периоΑ набΛюΑения 12.07 и 13.07 1987 г., о. ВрангеΛя Fig. 5. Duration of rest-activity phases of the Greenland lemming ♀ during the observation period, 12–13 July, 1987, Wrangel Island in Territorial behaviour of the greenlandic lemming (Dicrostonyx groenlandicus Trail, 1823) on Wrangel Island
Рис. 5. ПроΑоΛжитеΛьность фаз активности и покоя ♀ гренΛанΑского Λемминга в периоΑ набΛюΑения 12.07 и 13.07 1987 г., о. ВрангеΛя Fig. 5. Duration of rest-activity phases of the Greenland lemming ♀ during the observation period, 12–13 July, 1987, Wrangel Island
Fig. 4 in Territorial behaviour of the greenlandic lemming (Dicrostonyx groenlandicus Trail, 1823) on Wrangel Island
Fig. 4. Trajectories of ♂ movement during the observation period: a) 7 July from 00:57 to 06:40 (5 hours 43 minutes); b) 5 August from 21:00 to 22:53 (1 hour 53 minutes). The trajectories of movement are indicated by a solid black line. For other designations see Fig. 2
Yucca gigantea Lem. (BR0000025021783)
Belgium Herbarium image of <a href="https://www.plantentuinmeise.be">Meise Botanic Garden</a>.
Figure 7 in A new Norwegian Lemming subspecies from Novaya Zemlya, Arctic Russia
Figure 7. Comparison of crania, molar rows, and lower jaws of Novaya Zemlya (Lemmus lemmus chernovi ssp. nov.) [holotype RMBH Lem005] and Norwegian (L. l. lemmus) lemmings [specimen RMBH Lem040, Kola Peninsula]. (A, B, C) Crania of Novaya Zemlya Lemming: (A) dorsal view, (B) ventral view, and (C) lateral view. (D, E, F) Crania of Norwegian Lemming: (D) dorsal view, (E) ventral view, and (F) lateral view. Scale bar = 5 mm. (G, H) Molar rows of Novaya Zemlya Lemming: (G) maxillary, and (H) mandibular. (I, J) Molar rows of Norwegian Lemming: (I) maxillary, and (J) mandibular. Scale bar = 1 mm. (K, L) Lower jaw of Novaya Zemlya Lemming: (K) outer lateral view, and (L) inner lateral view. (M, N) Lower jaw of Norwegian Lemming: (M) outer lateral view, and (N) inner lateral view. Scale bar = 5 mm. (Photos: Vitaly M. Spitsyn).
Figure 5 in A new Norwegian Lemming subspecies from Novaya Zemlya, Arctic Russia
Figure 5. Ancestral coloration reconstruction (Bayesian Binary MCMC analysis) of Lemmus taxa based on our fossilcalibrated BEAST v. 1.10.4 phylogeny. Black numbers near nodes are BEAST's BPP. The Lemmus trimucronatus + L. nigripes clade (cryptic coloration) is omitted. (Photos: Vitaly M. Spitsyn).
Figure 6 in A new Norwegian Lemming subspecies from Novaya Zemlya, Arctic Russia
Figure 6. Dorsal view of lemming specimens: (A) Novaya Zemlya Lemming (Lemmus lemmus chernovi ssp. nov.) [holotype RMBH Lem005], and (B) Norwegian Lemming (L. lemmus lemmus) [RMBH Lem040, Kola Peninsula]. Scale bar = 10 mm. (Photos: Vitaly M. Spitsyn).
Figure 4 in A new Norwegian Lemming subspecies from Novaya Zemlya, Arctic Russia
Figure 4. Ancestral area reconstruction (combined scenario: S-DIVA + BayArea models) of Lemmus taxa based on our fossil-calibrated BEAST v. 1.10.4 phylogeny. Black numbers near nodes are BEAST's BPP.
Figure 3 in A new Norwegian Lemming subspecies from Novaya Zemlya, Arctic Russia
Figure 3. Phylogeny and phylogeography of Lemmus taxa. (A) Fossil-calibrated ultrametric chronogram of Lemmus obtained with BEAST v. 1.10.4 for the cytb haplotype data set. Bars indicate 95% confidence intervals of the estimated divergence times (Ka). Red and black numbers near nodes are mean ages (Ka) and BPP of BEAST, respectively. Red stars indicate time calibrations: a stem lineage of the Lemmus clade with absolute age estimate 2,600 Ka and 95% soft upper bound 5,200 Ka (C1); and Lemmus sp. 'Yakutia Mummy' with absolute age estimate 40 Ka (C2). Outgroup taxa (Dicrostonyx torquatus, D. hudsonius, Synaptomys cooperi, and Myopus schisticolor) are not shown. (B) Medianjoining haplotype network of Novaya Zemlya, Norwegian, and Siberian lemmings based on the cytb sequences (N = 17). Circle size is proportional to the number of available sequences belonging to a certain haplotype (smallest circle = one sequence). Small black dots indicate hypothetical ancestral haplotypes. Red numbers near branches indicate the number of nucleotide substitutions between haplotypes.
Figure 2 in A new Norwegian Lemming subspecies from Novaya Zemlya, Arctic Russia
Figure 2. Maximum likelihood (IQ-TREE) phylogeny of Lemmus taxa based on the cytb gene haplotypes. The Novaya Zemlya Lemming (Lemmus lemmus chernovi ssp. nov.) is colored red. The numbers near nodes are ultrafast bootstrap support values/Bayesian posterior probabilities. The red asterisks indicate the putative species-level clades supported by bPTP and sPTP species-delimitation models. The scale bar indicates the branch length. Outgroup taxa (Dicrostonyx torquatus, D. hudsonius, Synaptomys cooperi, and Myopus schisticolor) are not shown.
Figure 1 in A new Norwegian Lemming subspecies from Novaya Zemlya, Arctic Russia
Figure 1. Ranges and habitats of the true lemmings (Lemmus). (A) Distribution map of Lemmus taxa. Ranges were digitized based on published data and our records (Table 1). Red circles indicate sampling localities of Novaya Zemlya Lemming (L. lemmus chernovi ssp. nov.): 1 – Malye Karmakuly Polar Station (type locality), 2 – Bezymyannaya Bay (Table 1). The topographic base of the map was created with Natural Earth Free Vector and Raster Map Data (www.naturalearthdata.com). The map was created using ESRI ArcGIS 10 software (www.esri.com/arcgis). (B, C, D) Habitats of Lemmus taxa: (B) Novaya Zemlya Lemming (type locality, Novaya Zemlya), (C) Norwegian Lemming (Kola Peninsula), and (D) Siberian Lemming (Taimyr Peninsula). (Photos: Vitaly M. Spitsyn [B, C] and Natalia A. Zubrii [D])
Figure 3 in Complete mitochondrial genome of an Arctic Collared Lemming subspecies endemic to the Novaya Zemlya Archipelago, Russia
Figure 3. Bayesian Inference phylogenetic tree of the concatenated protein coding and rRNA genes based on available mitogenomes of Arctic Collared Lemming Dicrostonyx torquatus. The red font indicates the Novaya Zemlya subspecies D. torquatus ungulatus. The numbers near nodes represent Bayesian Posterior Probabilities (BPP) of MrBayes / Bootstrap Support (BS) values of IQ-Tree. The values above 95% for both BPP/BS are replaced with an asterisk. Outgroup taxa (Dicrostonyx hudsonius and D. groenlandicus) are not shown.
Figure 1 in Complete mitochondrial genome of an Arctic Collared Lemming subspecies endemic to the Novaya Zemlya Archipelago, Russia
Figure 1. Morphology of Novaya Zemlya Collared Lemming Dicrostonyx torquatus ungulatus (von Baer, 1841) from Novaya Zemlya Archipelago, Arctic Russia [topotype No. RMBH Lem16]: (A, B) specimen: (A) dorsal view, (B) ventral view; (C, D, E) crania: (C) dorsal view, (D) ventral view, (E) lateral view; (F, G) lower jaw: (F) outer lateral view, (G) inner lateral view; (H, I) molar rows: (H) maxillary, and (I) mandibular. Scale bars = 10 mm. (Photos: Elizaveta A. Spitsyna).
Linked collectors and determiners for: Distribución geográfica de algunas especies de los géneros Coryphantha (Engelm.) Lem. y Mammillaria Haw. (Cactaceae).
Natural history specimen data linked to collectors and determiners held within, "Distribución geográfica de algunas especies de los géneros Coryphantha (Engelm.) Lem. y Mammillaria Haw. (Cactaceae)". Claims or attributions were made on Bionomia by volunteer Scribes, <a href="https://bionomia.net/dataset/3006c2fd-b596-4368-b3b0-fd06116251da">https://bionomia.net/dataset/3006c2fd-b596-4368-b3b0-fd06116251da</a> using specimen data from the dataset aggregated by the Global Biodiversity Information Facility, <a href="https://gbif.org/dataset/3006c2fd-b596-4368-b3b0-fd06116251da">https://gbif.org/dataset/3006c2fd-b596-4368-b3b0-fd06116251da</a>. Formatted as a Frictionless Data package.
Berberis hookeri Hort. ex Lem. (BR0000014430541)
Belgium Herbarium image of <a href="https://www.plantentuinmeise.be">Meise Botanic Garden</a>.
Ribes x gordonianum Lem. (BR0000012561988)
Belgium Herbarium image of <a href="https://www.plantentuinmeise.be">Meise Botanic Garden</a>.
Seasonal role of a specialist predator in rodent cycles: Ermine-lemming interactions in the High Arctic
Open the record for dataset details and reuse information.
7-Dehydrocholesterol-derived oxysterols cause neurogenic defects in Smith-Lemli-Opitz syndrome
<p>Defective 3beta-hydroxysterol-delta<sup>7 </sup>-reductase (DHCR7) in the developmental disorder, Smith-Lemli-Opitz syndrome (SLOS), results in deficiency in cholesterol and accumulation of its precursor, 7-dehydrocholesterol (7-DHC). Here, we show that loss of <i>DHCR7</i> causes accumulation of 7-DHC-derived oxysterol metabolites, premature neurogenesis, and perturbation of neuronal localization in developing murine or human cortical neural precursors, both <i>in vitro</i> and <i>in vivo</i>. We found that a major oxysterol, 3b,5a-dihydroxycholest-7-en-6-one (DHCEO), mediates these effects by initiating crosstalk between glucocorticoid receptor (GR) and neurotrophin receptor kinase TrkB. Either loss of <i>DHCR7</i> or direct exposure to DHCEO causes hyperactivation of GR and TrkB and their downstream MEK-ERK-C/EBP signaling pathway in cortical neural precursors. Moreover, direct inhibition of GR activation with an antagonist or inhibition of DHCEO accumulation with antioxidants rescues the premature neurogenesis phenotype caused by the loss of <i>DHCR7</i>. These results suggest that GR could be a new therapeutic target against the neurological defects observed in SLOS.</p>
Short-term Behavioral Effects of Cholesterol Therapy in Smith-Lemli-Opitz Syndrome
ClinicalTrials.gov study NCT00114634. IPD Sharing: Not stated. Countries: 1. Publications: 3.
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