Methane emissions from the riverine sandy wetlands on the Mongolia Plateau.

Methane (CH) processes and fluxes have been widely investigated in low-latitude tropical wetlands and high-latitude boreal peatlands. In the mid-latitude Mongolia Plateau, however, CH processes and fluxes have been less studied, particularly in riverine wetlands. In this study, in situ experiments were conducted in the riverine sandy wetlands of the Mongolia Plateau to gain a better understanding of CH emissions and their influencing mechanisms.

Automated, high frequency, on-line dimethyl sulfide measurements in natural waters using a novel "microslug" gas-liquid segmented flow method with chemiluminescence detection.

Dimethyl sulfide (DMS) is the major biogenic volatile sulfur compound in surface seawater. Good quality DMS data with high temporal and spatial resolution are desirable for understanding reduced sulfur biogeochemistry. Here we present a fully automated and novel "microslug" gas-liquid segmented flow-chemiluminescence (MSSF-CL) based method for the continuous in-situ measurement of DMS in natural waters.

[Effect of soil moisture on water potential gradients in the soil-plant-atmosphere continuum (SPAC) of apple orchards in the Loess Plateau, Northwest China].

The variations of water potential gradients through the soil-plant-atmosphere continuum (SPAC) are of great significance to reveal the responses of plant water use to environmental changes. We conducted a continuous experiment to monitor the potentials in the near-canopy atmosphere (Ψ), soil (Ψ) and plant xylems (Ψ) during the growing season in an apple orchard located in the Loess Plateau. The results showed that the average Ψ during the growing season ranged from -0.

Sesquiterpenoids from and Their Antifeedant and Antifungal Activities.

Four new sesquiterpenoids, named artemivestinolide D-G (-) and three known sesquiterpenoids (-), were isolated from The structures of these new compounds were determined based on extensive spectroscopic data analyses. Furthermore, the electronic circular dichroism data determined the absolute configurations of the new compounds. The antifeedant and antifungal activities of the isolates were evaluated against third-instar larvae of and three plant pathogenic fungi.

Response of sap flow rate of apple trees to environmental factors in Loess Platea of Western Shanxi Province, China.

To clarify the effects of environmental factors on transpiration process of apple trees in rain-fed ecosystem, the dynamics of sap flow in apple trees from Loess Plateau area in western Shanxi Province of China were monitored using the thermal diffusion technique. Meanwhile, environmental factors including meteorological elements and soil moisture content were measured. The results showed that both net solar radiation (R) and atmospheric vapor deficit (VPD) were closely correlated with sap flow rate (J), as the main ones among all the measured environmental factors.

Prevalence of celiac disease in patients with Down syndrome: a meta-analysis.

Background: The association between Down syndrome and celiac disease has been reported by many studies. However, the prevalence of celiac disease (CD) in Down syndrome (DS) varies considerably across studies (from 0 % to 19 %). The aim of this study was to use meta-analysis to exam the prevalence of CD in patients with DS.

Oleanane-Type Saponins from the Roots of Ligulariopsis shichuana and Their α-Glucosidase Inhibitory Activities.

Five new oleanane-type saponins, named ligushicosides A-E, and three known oleanane-type saponins were isolated from the roots of . Their structures were established by a combination of spectroscopic techniques, including 1D and 2D NMR and high resolution electrospray ionization mass spectroscopy (HR-ESI-MS). Furthermore, all isolates were evaluated for their yeast -glucosidase inhibitory effects and exhibited potent inhibition against -glucosidase, while compounds and showed excellent inhibitory activities.

Association of Peripheral Blood Levels of Brain-Derived Neurotrophic Factor With Autism Spectrum Disorder in Children: A Systematic Review and Meta-analysis.

Importance: Accumulating evidence suggests that brain-derived neurotrophic factor (BDNF) may be implicated in the developmental outcomes of children with autism spectrum disorder (ASD).

Objective: To use meta-analysis to determine whether children with ASD have altered peripheral blood levels of BDNF.

Data Source: A systematic search of PubMed, PsycINFO, and Web of Science was performed for English-language literature through February 7, 2016.

Methane emissions from the trunks of living trees on upland soils.

Upland forests are traditionally thought to be net sinks for atmospheric methane (CH4 ). In such forests, in situ CH4 fluxes on tree trunks have been neglected relative to soil and canopy fluxes. We measured in situ CH4 fluxes from the trunks of living trees and other surfaces, such as twigs and soils, using a static closed-chamber method, and estimated the CH4 budget in a temperate upland forest in Beijing.

[Ecological characteristics of preferred habitat of reindeer of Daxing'an Mountain forest area Northeast China in summer].

In July and August of 2012 and 2013, habitat selection and use patterns of reindeer were studied using both line and strip-transect surveys. Twenty-three habitat factors were measured and compared in known reindeer range areas in northwestern China. A total of 72 sampling sites were designated as being used by reindeer, and 162 sites were designated as unused control plots.

[Surfactant-assisted solid-phase synthesis and spectral characterization of silver iodide nanowire bundles].

In the present paper, AgNO3 and KI were used as raw materials synthesize silver iodide nanowire bundles in the condition of nonionic surfactant polyethylene glycol (PEG-400) at room temperature. XRD, TEM and SEM techniques were used to characterize the silver iodide structure and morphology. The results indicated that the product was one-dimensional silver iodide nanowire bundles with diameters of 80-100 nm and lengths of 20 microm, and the length-diameter ratio was greater than 200.

[Preparation by template method and spectral characterization of α-MoO3 nanorods and nanometer rectangular pieces].

α-MoO3 was paid special attention to nano scale with its layered crystal structure and potential applications in material chemistry fields. In the present paper, (NH4)6 Mo7O24 x 4H2O and hexadecyl trimethyl ammonium bromide (CTAB) were proposed as molybdenum precursor and template agent, respectively, and the precursor was prepared by statistic ion exchange with strong acidic ion exchange resin (R-H). The precursor can be transformed into alpha-MoO3 nanorods and nanometer rectangular small pieces via calcining precursor at 600 degrees C for different times.

Two new compounds from Comastoma pedunlulatum.

Two new compounds, a xanthonoid and a flavonoid C-glycoside, were isolated from the ethyl acetate extract of the dried herb of Comastoma pedunlulatum. The structures of the new compounds were elucidated, respectively, as 1,8-dihydroxy-3,5-dimethoxyxanthone 1-O-[2-(4'-hydroxy-3',5'-dimethoxy-E-cinnamoyl)]-β-D-xylopyranosyl-(1-6)-β-D-glucopyranoside (1) and 6″-O-acetylisoorientin (2) on the basis of their spectroscopic and physicochemical properties.

[Summer habitat selection of alpine musk deer in Xinglongshan National Nature Reserve, Northwestern China].

During July and August from 2006 to 2008, summer habitat selection was studied in Alpine musk deer (Moschus sifanicus) in Xinglongshan National Natural Reserve in northwestern China. In total, seventy one musk deer utilized habitat plots and 246 random habitat plots were surveyed. Seventeen habitat characteristics were recorded and compared between the two habitat types, using Mann-Whitney U test and chi-square to compare the differences between utilized and random habitat plots, and principal component analysis (PCA) to determine the main factors influencing the habitat selection of musk deer.

A new jacaranone derivative from Senecio scandens var. incisus.

A new jacaranone derivative, 2-(1,6-dihydroxy-4-oxocyclohex-2-enyl) acetic acid (1), has been isolated from the whole plants of Senecio scandens var. incisus, together with three known compounds: 2'-(p-hydroxyl-cinnamoyl)-6'-jacaranone-D-glucopyranoside (2), 2'-caffeoyl-6'-jacaranone-D-glucopyranoside (3) and kampferol-3-rhamnoside (4). Their structures were elucidated on the basis of spectroscopic data analyses and by comparison with the related known compounds.

[Application of fluorescence microscopic imaging technique with self-ordered ring to residues detection of antibiotics].

Fluorescence microscopic self-ordered ring (SOR) technique with microwave heating is proposed for minocycline based on the capillary flow of solvent on the surface of hydrophobic glass slide and applied to residues detection of the antibiotics in milks of Inner Mongolia. In the reaction medium of hexahydropyridine containing polyvinyl alcohol-124 (PVA-124), a SOR of minocycline with the outer diameter of 1.54 mm and the ring belt width of 22.

[Preparation of Nd2O3 nanoparticles by ion exchange resin homogenous precipitation method].

In the present paper, homogenous precipitation with Nd(NO)3.6H2O and (NH)2CzO4.2H2O, a strong base anion exchange resin and strong acidic cation exchange resin, respectively, and subsequent calcination of precursors at 700 C were used to synthesize Nd2O3 nanoparticles.

[Determination of nutrients in 7 species of desert plants for raising livestock in inner Mongolia].

In order to accumulate the foundational information about the nutrients related to 7 species of desert plants, chemical and instrumental methods for determination were used and quantitative results were obtained as follows (%, in dry mass): calcium 0.73-3.89, phosphorus 0.