Magnetospirillum magnetotacticum possesses intracellular magnetite particles with a chain-like structure, termed magnetosomes. The bacterium expresses 22-kDa and 12-kDa magnetosome-associated proteins, Mam22 (MamA) Mam12 (MamC), respectively. In this study, we investigated the structure of purified magnetosomes transmission electron microscopic techniques found that consisted four compartments, i.e., crystal, magnetosomal membrane, interparticle connection, matrix. Furthermore, determined...

The unique ability of magnetotactic bacteria to navigate along a geomagnetic field is accomplished with the help prokaryotic organelles, magnetosomes. magnetosomes have well-ordered chain-like structures, comprising membrane-enveloped, nano-sized magnetic crystals, and various types specifically associated proteins. In this study, we applied atomic force microscopy (AFM) investigate spatial configuration isolated from Magnetospirillum magneticum AMB-1 in near-native buffer conditions. AFM...

ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTWater soluble heterocyclophane as a novel class of inclusion hostIwao Tabushi, Hideaki Sasaki, and Yasuhisa KurodaCite this: J. Am. Chem. Soc. 1976, 98, 18, 5727–5728Publication Date (Print):September 1, 1976Publication History Published online1 May 2002Published inissue 1 September 1976https://pubs.acs.org/doi/10.1021/ja00434a069https://doi.org/10.1021/ja00434a069research-articleACS PublicationsRequest reuse permissionsArticle...

Plasticity in sex differentiation is known to be common teleost fishes. Anemonefishes are protandrous; females the largest and dominant members of social groups, displaying frequent aggressive behavior towards other groups. The second-ranked individuals become males others remain as non-reproductive individuals. Here we examine influence interaction in-group on false clown anemonefish, Amphiprion ocellaris, under laboratory conditions. Three juvenile anemonefish were kept a tank for 180 days...

Anemonefish, Amphiprion spp., are socially controlled, protandrous sex changers with a monogamous mating system. Under certain conditions, sexually immature anemonefish ambisexual gonads differentiate directly into males or females. Formation and maintenance of social rank in group considered key requirements for the induction change differentiation. Generally, each animal living experiences different level stress accordance its rank, we hypothesize that situation individual influences...

Phylogenetic relationships of Akkesiphycus lubricum with the Laminariales and related taxa were assessed by molecular phylogenetic analyses based on Rubisco large subunit gene (rbcL), internal transcribed spacer regions (ITS1 ITS2), 18S ribosomal DNA (18s rDNA) sequence data. Among three data sets, rbcL sequences gave best resolution for indicating familial ordinal within taxa. Using data, showed closest relationship to Pseudochordaceae (Laminariales) this was also supported ITS rDNA The...

Reaction of tosylmethyl isocyanide (2) with heteroaromatic aldehydes, i.e., 2-furaldehyde (1a), 5-nitro-2-furaldehyde (1b) and 5-methoxycarbonyl-2-furaldehyde (1c) ; thiophene-2-carbaldehyde (1d) 5-nitrothiophene-2-carbaldehyde (1e) 1-methylpyrrole-2-carbaldehyde (1f) 2-, 3- 4-pyridinemonocarbaldehyde (1g, 1h 1i) in the presence an equimolar amount potassium carbonate refluxing methanol afforded corresponding 5-substituted oxazoles (3a-i). However, a similar treatment pyrrole-2-carbaldehyde...

The reaction of tosylmethyl isocyanide (7) with methyl propiolate (14a), dimethyl acetylenedicarboxylate (14b), 3-(2-furoyl) (14c), and 3-benzoylpropiolate (14d) in the presence an equimolar amount base at room temperature gave corresponding 1 : 2 adducts, i.e., 3-(1-pyrrolyl) acrylate derivatives (16a, 16b, 16c, 16d, respectively) as final products. dependence made it possible to isolate pyrroles (15a 15b), postulated intermediates reaction, low temperature.

The Fukushima Daiichi Nuclear Power Plant accident released large amounts of radioactive substances into the environment and contaminated soil Tohoku Kanto districts in Japan. Removal material from is an urgent problem, purification using plants being considered. In this study, we investigated ability 12 seed plant species a cyanobacterium to accumulate material. did not at high levels, but accumulation was observed terrestrial Nostoc commune. Nihonmatsu City, Prefecture, N. commune...

Chorda rigida Kawai et Arai, sp. nov. (Chordaceae, Laminariales) is described from the Sea of Japan, NW Pacific. This species resembles filum (Linnaeus) Stackhouse but distinguished by following characteristics: 1) sporophytes grow on more or less exposed rocks at 2–7 m depth and do not form dense tufts; 2) compared with C. , are much rigid composed denser cortical layers (6–18 cells thick); 3) becomes fertile disappears in late spring to summer, whereas appears early oversummers, only...

AbstractPhylogenetic relationships of problematic members the Laminariales (Halosiphon and Phyllariaceae) Tilopteridales were studied comparing Rubisco gene (rbcL spacer) ribosomal DNA (5.8S, ITS2 a part 26S) sequence data covering all species these taxa 'primitive' Laminariales. Molecular phylogenetic trees constructed by use maximum parsimony (MP), likelihood (ML) neighbour-joining (NJ) methods. The rbcL supported monophyletic its close affiliation with Phyllariaceae Halosiphon, contrary...

Four species in the order Dictyotales ( Dictyopteris latiuscula (Okamura) Okamura, D. prolifera repens Børgesen, and Spatoglossum crassum J. Tanaka) were found to be highly acidic as some of Desmarestiales (Phaeophyceae). The pH within their cells, presumably that vacuole, was estimated 0.5 0.9 by measurements cell extracts distilled water. However, other these genera divaricata undulata Holmes, S. pacificum Yendo) did not show high acidity. Ion chromatography showed those contained...

The phenology, life history, ultrastructure of reproductive structures, and molecular phylogeny using rbc L rDNA (5.8S, internal transcribed spacer 2, partial 26S) gene sequences Stschapovia flagellaris , endemic to the northwestern Pacific Ocean, were studied. This species was first classified in order Delamareales together with Delamarea Coelocladia Cladothele . Those three genera, however, later transferred Dictyosiphonales, whereas systematic position remained unclear. At Abashiri,...

Lifestyle-related diseases arise from obesity in 30 – 60% of cases. In recent years, food functions controlling the nutritional physiology lipids have been a focus disease prevention. Animal feeding experiments revealed that esters made gallic acid (GA) and (-)-epigallo-catechin (EGC) or linoleyl alcohol are more effective weight-loss promotion metabolic syndrome management than intact GA EGC. this study, an ester (DOGGA) was chemically synthesized 1,2-dioleoyl glycerol its effect compared...

Doping of an energy‐transfer‐type laser dye pair into alumina film was tried in order to increase the efficiency its photoproperties. A transparent prepared from aqeous sol solution by sol—gel process. Changes fluorescence pyranine were monitored during process aqueous dried gel. The undesirable aggregation usually observed largely reduced film. emission rhodamine B N 2 pumping can be increased addition 6G, which enhances efficiency. It indicates that this doped operates as a compact

Growth of Escherichia coli K-12 in a modified Davis minimal medium was inhibited under high osmolarity, but it recovered remarkably with the addition 1 mM proline. The co-existence K+ proline enhanced recovery growth osmolarity more than that presence alone. same true for activities respiration and glucose uptake. A similar supplementary effect observed uptake osmolarity. These results suggest support not only respiratory substrate cell cytoplasm when exposed to External almost disappeared h...

Abstract Chorda kikonaiensis Sasaki & Kawai sp. nov. is newly described from Hokkaido, Japan, on the basis of morphological and molecular data. Furthermore, based latter, common species that has been identified as filum in Japan shown to be independent European (true) at level. Therefore, asiatica for cryptic Japanese taxon. resembles C. asiatica, but distinguished by shorter (0.4–1.3 m) softer sporophyte, thinner cortex composed fewer (2–4) cells. The independence this further supported...

ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTGuanosine-Specific DNA Damage by a Co(II).cntdot.Bithiazole ComplexStefanie A. Kane, Hideaki Sasaki, and Sidney M. HechtCite this: J. Am. Chem. Soc. 1995, 117, 36, 9107–9118Publication Date (Print):September 1, 1995Publication History Published online1 May 2002Published inissue 1 September 1995https://pubs.acs.org/doi/10.1021/ja00141a001https://doi.org/10.1021/ja00141a001research-articleACS PublicationsRequest reuse permissionsArticle...

Aliphatic, aromatic, and heteroaromatic carboxylic acids react with 1, 1'-oxalyldiimidazole (1) or 1'-oxalyldi (1, 2, 4-triazole) (2) in acetonitrile for 40min at 40 °C to give the corresponding 1-acylazole intermediates (11), which promptly undergo aminolysis alcoholysis form amides (13) including dipeptides (14), esters (16), thioesters (19). These findings show that both 1 2 can be utilized as condensing reagents synthesis of acid derivatives.