The Experts below are selected from a list of 360 Experts worldwide ranked by ideXlab platform

Guy J Collin - One of the best experts on this subject based on the ideXlab platform.

Jia Lanlin - One of the best experts on this subject based on the ideXlab platform.

  • experimental study on anti tumor effects of ursolic acid extracted from Ledum
    Shanxi Medical Journal, 2010
    Co-Authors: Jia Lanlin
    Abstract:

    Objective To study the anti-tumor activities of ursolic acid extracted from Ledum.Methods Vapor distillation method was used to extract ursolic acid from Ledum,the inhibitory effect of the extract on tumor cells proliferation was assayed by MTT method in human leukemia cell line K562,breast cancer cell lines cap37 and lung cancer cell line A549,respectively.Results The extract from Ledum displayed obvious proliferation inhibitory effects on K562,Bcap37 and A549 cells(P0.01).Conclusion The extract from Ledum showed significant antitumor effects.

Kramadibrata Kartini - One of the best experts on this subject based on the ideXlab platform.

  • FUNGI MIKORIZA ARBUSKULA PADA RIZOSFER Pericopsis mooniana (Thw.) Thw. DI SULAWESI TENGGARA
    'Indonesian Institute of Sciences', 2015
    Co-Authors: Husna Husna, Budi R, Sri Wilarso, Mansur Irdika, Kusmana Cecep, Kramadibrata Kartini
    Abstract:

    The research was conducted with the aim to identify species of arbuscular mycorrhizal fungi (AMF) associated with nedum [Pericopsismooniana (Thw.) Thw.]. Soil sampling was conducted in 6 locations of nedum habitat in South-east Sulawesi. The results showed that nedum associated with 15 species of AMF that belonging to 5 families and 9 genera, Acaulosporaceae (Acaulospora scrobiculata and A. delicata), Claroideoglomeraceae (Claroideoglomus etunicatum), Glomeraceae (Glomus aggregatum, G. boreale, G. canadense, G. halonatum,G. versiforme, Rhizophagus diaphanus, R. fasciculatus, Sclerocystis clavispora and Septoglomus constrictum), Gigasporaceae (Racocetragregaria and Scutellospora auriglobosa), Ambisporaceae (Ambispora appendicula). The four species of AMF were found on nedum, i.e Glomus boreale, G. canadense, G. halonatum and Racocetra gregaria which were a new record for mycological collection of Indonesia

Bert M. Cregg - One of the best experts on this subject based on the ideXlab platform.

  • evaluation of nutrient management and mulching strategies for vegetable production on an extensive green roof
    Agroecology and Sustainable Food Systems, 2016
    Co-Authors: Leigh J. Whittinghill, Bradley D Rowe, Mathieu Ngouajio, Bert M. Cregg
    Abstract:

    ABSTRACTSubstrate nutrient and moisture management are two major concerns in green roof agriculture, especially when using extensive systems, but there are currently no recommendations or best management practices. The purpose of this study was to explore three mulching strategies (pine bark, living sedum, and no mulch) and three fertilization regimens (25, 50, and 100 g∙m−2 of 14-14-14 N-P-K slow release fertilizer applied twice each growing season) over two growing seasons to determine their benefits to rooftop agriculture. Tomatoes (Solanum lycopersicum), beans (Phaseolus vulgaris), cucumbers (Cucumis sativus), peppers (Capsicum annuum), basil (Ocimum basilicum), and chives (Allium schoenoprasum) were grown. The 2010 crops outperformed those grown in 2011, likely because of the more extreme temperature and precipitation variations during 2011. When there were differences among mulch treatments, pine bark usually resulted in higher productivity than live sedum mulch. The effects of live sedum mulch on c...

  • Comparison of stormwater runoff from sedum, native prairie, and vegetable producing green roofs
    Urban Ecosystems, 2015
    Co-Authors: Leigh J. Whittinghill, D. Bradley Rowe, Jeffery A. Andresen, Bert M. Cregg
    Abstract:

    Stormwater retention is one of the well-studied benefits of green roofs. A roof’s ability to retain stormwater depends on factors such as the intensity and duration of the rain event as well as substrate depth, substrate moisture content at the start of the rain event, and vegetation type, health, density and water use efficiency. Extensive green roofs used for crop production differ from traditional Sedum and prairie-covered extensive green roofs in plant density and water use efficiency, but their impact on stormwater retention has not been well studied. Three vegetation types (unfertilized Sedum and native prairie species mixes, and a fertilized vegetable and herb species mix) were compared for stormwater runoff quantity over three growing seasons and stormwater runoff quality during one growing season. The prairie covered green roofs had the lowest increase in runoff as precipitation increased, almost half that of Sedum or vegetable producing green roof treatments. Vegetation type had no effect on runoff nitrate-nitrogen (NO_3 ^−) concentrations, but NO_3 ^− concentrations decreased over the course of the growing season. Runoff phosphorus (P) concentrations also decreased over time in the Sedum and prairie treatments, which were lower than P concentrations from the vegetable green roof throughout the growing season. This is likely a result of the difference between amounts of NO_3 ^− and P applied to the vegetable green roof and the needs of the crop plants in that treatment. The similarities in water retention and water quality between vegetable producing extensive green roofs and Sedum green roofs suggest that vegetable production with careful nutrient management will not have a negative impact on stormwater retention or runoff water quality.

  • solar radiation intensity influences extensive green roof plant communities
    Urban Forestry & Urban Greening, 2009
    Co-Authors: Kristin L. Getter, Bradley D Rowe, Bert M. Cregg
    Abstract:

    Abstract Two studies were conducted on a third-story rooftop to quantify the effect of solar radiation (full sun versus full shade) on several US native and non-native species for potential use on extensive green roofs. In the first study, plugs of six native and three non-native species were planted in May 2005 on substrates of two different depths (8.0 and 12.0 cm) both in sun and shade. Absolute cover (AC) was recorded using a point-frame transect during the growing season beginning in June 2005 and every 2 weeks thereafter for a period of 4 years. By week 174 (23 September 2008), most species exhibited different AC within a depth between sun and shade. However, when all species were combined, overall AC did not differ between sun and shade within a depth. This indicated that while species make-up was changing among solar radiation levels, that overall coverage was not significantly different between sun and shade. For all substrate depths and solar levels, the most abundant species were Sedum acre , Allium cernuum , Sedum album ‘Coral Carpet’, and Talinum calycinum . Less abundant species included Talinum parviflorum , Carex flacca , Sedum stenopetalum , and Sedum divergens , which all exhibited 0 or near 0 AC regardless of depth or solar radiation levels. With the exception of T. calycinum , native species were less abundant than non-native species. In the second study, six common extensive green roof species of Sedum established from seed in May 2005 on a 10.0 cm (3.9 in) substrate depth were compared in both sun and shade over four growing seasons. AC was evaluated as in the previous study. Solar radiation did not affect AC, but overall species composition differed between sun and shade levels. The most abundant species in full sun were S. acre (0.57 AC) and S. album ‘Coral Carpet’ (0.51 AC). Sedum kamtschaticum (0.57 AC) and Sedum spurium ‘Coccineum’ (0.35 AC) performed the best in the shade. For both solar levels, the least abundant species at week 174 were Sedum pulchellum (0.0 AC) and S. album ‘Coral Carpet’ (0.1 AC).

Francine Belleau - One of the best experts on this subject based on the ideXlab platform.