Bis(3,5-dicarboxy­benzoato-κ2 O,O′)(1,10-phenanthroline-κ2 N,N′)cadmium(II)

The mol­ecule of the title compound, [Cd(C9H5O6)2(C12H8N2)], has crystallographic twofold rotation symmetry. The CdII atom, located on the twofold axis, assumes a CdO4N2 distorted octa­hedral coordination geometry. In the crystal structure, the mol­ecules link to each other by O—H⋯O and C—H⋯O hydrogen bonding to form a three-dimensional supra­molecular network

A second modification of poly[diaquadi-μ-citrato(3−)-trizinc(II)]

A second modification of the zinc(II) coordination polymer with citric acid, [Zn3(C6H5O7)2(H2O)2]n or [Zn(citrate)2(H2O)2], has been synthesized under hydro­thermal conditions by reacting zinc acetate with citric acid. The structure contains two unique Zn atoms, one with a distorted octa­hedral coordination and located on an inversion centre, and one with a distorted tetra­hedral coordination. The ZnO6 and ZnO4 units are linked into layers extending parallel to (010)

Helicobacter pylori infection is associated with decreased serum levels of high density lipoprotein, but not with the severity of coronary atherosclerosis

<p>Abstract</p> <p>Objective</p> <p>The objective of this survey was to study the association between <it>Helicobacter pylori </it>infection and the severity of coronary atherosclerosis.</p> <p>Methods</p> <p>The study population consisted of 961 consecutive patients (711 males and 250 females) who underwent coronary angiography for suspected or known coronary atherosclerosis. The patients' body mass index, blood pressure, the blood lipid, blood glucose, leukocyte count (10⁹/L), neutrophil count (10⁹/L), and Helicobacter <it>pylori</it>-specific IgG antibodies were performed. Coronary angiograms were scored according to vessel score and Gensini's score.</p> <p>Results</p> <p>A significant association between <it>H. pylori </it>infection and coronary atherosclerosis as well as its severity was not find in this cross section study (<it>p </it>= 0.858). And, the level distribution of vessel score (<it>p </it>= 0.906) and Gensini's score (<it>p </it>= 0.905) were similar in the seropositivity group and seronegativity group of Helicobacter <it>pylori </it>infection. However, the level of fasting high-density lipoprotein cholesterol (mmol/L) (<it>p </it>= 0.013) was significantly lower in the seropositivity group than that in the seronegativity group of Helicobacter <it>pylori </it>infection.</p> <p>Conclusions</p> <p>In conclusion, in the present study, a significantly correlation between Helicobacter <it>pylori </it>seropositivity and angiographically evaluated severity of atherosclerosis was not find. And, the present study showed a good correlation between Helicobacter <it>pylori </it>infection and decreased HDL cholesterol. However, the exact mechanisms need further study.</p

Analysis and treatment of the condensation on discharged grain in early spring season in Beijing

Temperature difference and dew point are two important factors for moisture condensation of the storage grain.According to the large temperature humidity，storage temperature and humidity，grain temperature conditions and rice moisture during the discharge period of the finished grain rice，the reasons for moisture condensation were concluded.Using the relevant charts such as grain pile dew point approximation checklist，grain absolute humidity graph and atmospheric absolute humidity map，the main method of grain pile dew predicting were summarized and the feasible and effective treatment measures were provided which has positive significance for the safe storage of finished grai

Diaqua­bis(2,2′-biimidazole)cobalt(II) dichloride

There are independent cations and four chloride anions in the crystal structure of the title complex, [Co(C6H6N4)2(H2O)2]Cl2. In each cation, the CoII cation is coordinated by four N atoms from two biimidazole and two O atoms of two water mol­ecules; one Co atom is at a position of site symmetry m, the other at a position of site symmetry 2/m. All Cl− ions and water mol­ecules are also located on the mirror plane. Each structural unit is connected through O—H⋯Cl and N—H⋯Cl inter­molecular hydrogen bonds, forming a three–dimensional supramolecular structure

Diversity and structure of soil bacterial communities in the Fildes Region (maritime Antarctica) as revealed by 454 pyrosequencing

This study assessed the diversity and composition of bacterial communities in four different soils (human-, penguin-, seal-colony impacted soils and pristine soil) in the Fildes Region (King George Island, Antarctica) using 454 pyrosequencing with bacterial-specific primers targeting the 16S rRNA gene. Proteobacteria, Actinobacteria, Acidobacteria, and Verrucomicrobia were abundant phyla in almost all the soil samples. The four types of soils were significantly different in geochemical properties and bacterial community structure. Thermotogae, Cyanobacteria, Fibrobacteres, Deinococcus-Thermus, and Chlorobi obviously varied in their abundance among the 4 soil types. Considering all the samples together, members of the genera Gaiella, Chloracidobacterium, Nitrospira, Polaromonas, Gemmatimonas, Sphingomonas and Chthoniobacter were found to predominate, whereas members of the genera Chamaesiphon, Herbaspirillum, Hirschia, Nevskia, Nitrosococcus, Rhodococcus, Rhodomicrobium, and Xanthomonas varied obviously in their abundance among the four soil types. Distance-based redundancy analysis revealed that pH (p < 0.01), phosphate phosphorus (p < 0.01), organic carbon (p < 0.05), and organic nitrogen (p < 0.05) were the most significant factors that correlated with the community distribution of soil bacteria. To our knowledge, this is the first study to explore the soil bacterial communities in human-, penguin-, and seal- colony impacted soils from ice-free areas in maritime Antarctica using high-throughput pyrosequencing

Population structure analysis and genome-wide association study of a hexaploid oat landrace and cultivar collection

IntroductionOat (Avena sativa L.) is an important cereal crop grown worldwide for grain and forage, owing to its high adaptability to diverse environments. However, the genetic and genomics research of oat is lagging behind that of other staple cereal crops. MethodsIn this study, a collection of 288 oat lines originating worldwide was evaluated using 2,213 single nucleotide polymorphism (SNP) markers obtained from an oat iSelect 6K-beadchip array to study its genetic diversity, population structure, and linkage disequilibrium (LD) as well as the genotype–phenotype association for hullessness and lemma color.ResultsThe average gene diversity and polymorphic information content (PIC) were 0.324 and 0.262, respectively. The first three principal components (PCs) accounted for 30.33% of the genetic variation, indicating that the population structure of this panel of oat lines was stronger than that reported in most previous studies. In addition, accessions could be classified into two subpopulations using a Bayesian clustering approach, and the clustering pattern of accessions was closely associated with their region of origin. Additionally, evaluation of LD decay using 2,143 mapped markers revealed that the intrachromosomal whole-genome LD decayed rapidly to a critical r2 value of 0.156 for marker pairs separated by a genetic distance of 1.41 cM. Genome-wide association study (GWAS) detected six significant associations with the hullessness trait. Four of these six markers were located on the Mrg21 linkage group between 194.0 and 205.7 cM, while the other two significant markers mapped to Mrg05 and Mrg09. Three significant SNPs, showing strong association with lemma color, were located on linkage groups Mrg17, Mrg18, and Mrg20.DiscussionOur results discerned relevant patterns of genetic diversity, population structure, and LD among members of a worldwide collection of oat landraces and cultivars proposed to be ‘typical’ of the Qinghai-Tibetan Plateau. These results have important implications for further studies on association mapping and practical breeding in high-altitude oat