BACKGROUND AND AIMS Although many methods exist for quantifying the number of pollen grains in a sample, there are few standard methods that are user-friendly, inexpensive and reliable. The present contribution describes a new method of counting pollen using readily available, free image processing and analysis software. METHODS Pollen was collected from anthers of two species, Carduus acanth...

Amino compounds, such as amino acids and biogenic amines, are important metabolites that can be found in diverse natural matrices. The most common method for compound analysis nowadays is reversed-phase liquid chromatography tandem mass spectrometry (RPLC-MS/MS). However, due to the polar basic nature of their RPLC retention often insufficient or peaks tailing. Derivatization a way overcome iss...

15 new native and alien species of vascular plants are reported for the Irkutsk Region, Republic Buryatia, Trans-Baikal Territory: Agropyron michnoi Roshev., Arctopoa schischkinii (Tzvelev) Prob., Arnica intermedia Turcz., Atocion armeria (L.) Fourr., Cynodon dactylon Pers., Dracocephalum argunense Fisch. ex Link, Eragrostis minorHost, Festuca richardsonii Hook., Lespedeza davurica (Laxm.) Schi...

Clinacanthus nutans (Burm.f) (CN) Lindau is widely grown in tropical Asia and is an important herbal medicine in China, Malaysia and Thailand. This study inspects the antioxidant activity and protective effects of Clinacanthus nutans extracts on plasmid DNA integrity in E. coli. The antioxidant activities of Clinacanthus nutans are lower compared with green tea. The superoxide dismutase (SOD) a...

BACKGROUND Spasmus nutans and congenital ocular motor apraxia share clinical characteristics. However, their development in a patient with cerebellar vermian hypoplasia has not been previously described. OBJECTIVE To report spasmus nutans and congenital ocular motor apraxia in a child with cerebellar vermian hypoplasia. DESIGN Case report. SETTING Tertiary-care hospital. Patient A 7-year-...

Extremes in climate, such as heat waves and drought, are expected to become more frequent and intense with forecasted climate change. Plant species will almost certainly differ in their responses to these stressors. We experimentally imposed a heat wave and drought in the tallgrass prairie ecosystem near Manhattan, Kansas, USA to assess transcriptional responses of two ecologically important C4...

We examined the role of interspecific competition in the regulation of abundance and coexistence of the dominant grasses in tallgrass prairie using a removal experiment with Andropogon gerardii Vitman and Sorghastrum nutans L. Nash, two of the most abundant grasses in tallgrass prairie. Plant removal treatments (using foliar herbicide), applied to 0.3-m2 plots at the Konza Prairie Biological St...

During a period of 60 days assays were carried out with the moss Pohlia nutans transplanted from an uncontaminated control site to a dump consisting of a heavily polluted mine and smelter wastes located near wałbrzych in southwestern Poland. within the same period also samples of native P. nutans growing on the dump substrate were collected together with the same species from a control site. Co...

OBJECTIVES The aim of this study was to compare the results of dimethylthiazol diphenyltetrazolium bromide (MTT) and neutral red uptake (NRU) assays of Clinacanthus nutans cytotoxicity. MATERIALS AND METHODS Mouse fibroblast (L929) cells were exposed to 0.01%, 0.1%, 0.25%, and 0.5% (W/V) C. nutans in a 96-cluster-well-culture plate for 24 h. The cell viability after exposure to C. nutans was ...

Concentrations of accumulated heavy metals were compared between the terrestrial bryophyte Pohlia nutans and needles and bark of Larix decidua collected on a dump situated in the vicinity of cokeand sulphuric acid-producing factories and a municipal thermal-electric power station. The dump consisted of heavily polluted mine and smelter wastes located near Walbrzych (southwestern Poland). The pl...