MicroLEIS: A microcomputer-based Mediterranean land evaluation information system   总被引：4，自引：0，他引：4  

D. De la  Rosa  J. A. Moreno  L. V. Garcia  J. Almorza 《Soil Use and Management》1992,8(2):89-96

Abstract. A computer-based land evaluation information system (MicroLEIS) was developed for optimal use of agricultural and forestry land systems under Mediterranean conditions. Through an interactive procedure several land capability, suitability and yield prediction methods may be applied. The system addresses land evaluation at reconnaissance, semi-detailed and detailed scales in an interrelated manner. Biophysical land evaluation methods are incorporated using empirical, scale-appropriate models, which range from purely qualitative (reconnaissance) through semi-quantitative (semi-detailed) to quantitative (detailed). This software is helpful for teaching, research and development, predicting appropriate agroforestry land uses. Its use is illustrated by an example.
MicroLEIS runs on IBM PC, XT, AT, or a compatible microcomputer with at least 128 kilobytes of RAM and a PC-DOS or MS-DOS version 2.0 or later operating system. The software package on double or high density diskettes can be obtained from the first author.  相似文献   

Potential chemical time bombs in the schelde estuary     

G. T. M. Van Eck  N. M. De Rooij 《Land Degradation \u0026amp; Development》1993,4(4):317-332

The Schelde estuary is heavily polluted with many different (micro)pollutants. This results in high concentrations in the abiotic and biotic compartments of the Schelde estuary and in various effects. the present day suboxic and anoxic conditions in the upper estuary are probably responsible for the high distribution coefficients for some trace metals in the lower Schelde estuary (Western Schelde). a future reduction in discharges with a high biological oxygen demand will therefore not only result in higher oxygen concentrations, but probably also in lower distribution coefficients for trace metals in the Western Schelde. Simulations show that lower trace metal distribution coefficients will probably result in higher concentrations of dissolved (bioavailable) trace metals, even with substantially reduced discharge rates, due to the desorption of trace metals from resuspended bottom sediments.  相似文献   

Filtration Rates of Catfish Pond Phytoplankton by Nile Tilapia Oreochromis niloticus     

Peter W.  Perschbacher Wendell J.  Lorio 《Journal of the World Aquaculture Society》1993,24(3):434-437

  相似文献   

A New Bioassay Platform Design for the Discovery of Small Molecules with Anticancer Immunotherapeutic Activity     

Carmela Gallo  Giusi Barra  Marisa Saponaro  Emiliano Manzo  Laura Fioretto  Marcello Ziaco  Genoveffa Nuzzo  Giuliana d&#x;Ippolito  Raffaele De Palma  Angelo Fontana 《Marine drugs》2020,18(12)

Immunotherapy takes advantage of the immune system to prevent, control, and eliminate neoplastic cells. The research in the field has already led to major breakthroughs to treat cancer. In this work, we describe a platform that integrates in vitro bioassays to test the immune response and direct antitumor effects for the preclinical discovery of anticancer candidates. The platform relies on the use of dendritic cells that are professional antigen-presenting cells (APC) able to activate T cells and trigger a primary adaptive immune response. The experimental procedure is based on two phenotypic assays for the selection of chemical leads by both a panel of nine tumor cell lines and growth factor-dependent immature mouse dendritic cells (D1). The positive hits are then validated by a secondary test on human monocyte-derived dendritic cells (MoDCs). The aim of this approach is the selection of potential immunotherapeutic small molecules from natural extracts or chemical libraries.  相似文献   

Artificial Diet Influences Population Growth of the Root Maggot Bradysia impatiens (Diptera: Sciaridae)     

Yuping Gou  Peter Quandahor  Kexin Zhang  Sufan Guo  Qiangyan Zhang  Changzhong Liu  Jeffrey A Coulter 《Journal of insect science (Online)》2020,20(5)

In order to investigate the effects of artificial diets on the population growth of root maggot Bradysia impatiens, its population growth parameters were assayed on eight artificial diets (Diet 1, D2, D3, D4, D5, D6, D7, and D8). Results showed that developmental duration from egg to pupa was successfully completed on all eight artificial diets. However, the egg to pupal duration was shortest, while the survival rate of four insect stages was lowest when B. impatiens was reared on D1. When B. impatiens was reared on D7 and D8, the survival rate, female longevity, and female oviposition were higher than those reared on other diets. When B. impatiens was reared on D7, the intrinsic rate of increase (r_m = 0.19/d), net reproductive rate (R₀ = 39.88 offspring per individual), and finite rate of increase (λ = 1.21/d) were higher for its population growth with shorter generation time (T = 19.49 d) and doubling time (Dt = 3.67 d). The findings indicate that the D7 artificial diet is more appropriate for the biological parameters of B. impatiens and can be used an indoor breeding food for population expansion as well as further research. We propose that vitamin C supplement added to the D7 is critical for the improvement of the B. impatiens growth.  相似文献   

Toward the Identification of Novel Antimicrobial Agents: One-Pot Synthesis of Lipophilic Conjugates of N-Alkyl d- and l-Iminosugars     

Anna Esposito  Daniele D&#x;Alonzo  Stefano D&#x;Errico  Eliana De Gregorio  Annalisa Guaragna 《Marine drugs》2020,18(11)

In the effort to improve the antimicrobial activity of iminosugars, we report the synthesis of lipophilic iminosugars 10a–b and 11a–b based on the one-pot conjugation of both enantiomeric forms of N-butyldeoxynojirimycin (NBDNJ) and N-nonyloxypentyldeoxynojirimycin (NPDNJ) with cholesterol and a succinic acid model linker. The conjugation reaction was tuned using the established PS-TPP/I₂/ImH activating system, which provided the desired compounds in high yields (94–96%) by a one-pot procedure. The substantial increase in the lipophilicity of 10a–b and 11a–b is supposed to improve internalization within the bacterial cell, thereby potentially leading to enhanced antimicrobial properties. However, assays are currently hampered by solubility problems; therefore, alternative administration strategies will need to be devised.  相似文献   

Crop rotation sequencing to minimize yield losses of summer-irrigated lowland rice in Myanmar caused by the rice root-knot nematode Meloidogyne graminicola     

Pa Pa Win  Pyone Pyone Kyi  Zin Thu Zar Maung  Yi Yi Myint  Dirk De Waele 《国际虫害防治杂志》2020,66(4):319-331

Abstract

The effect of different rice-based crop rotation sequences on the population densities of Meloidogyne graminicola and on the yield of rice was evaluated in a microplot experiment under lowland rice field conditions. Ten treatments of cropping sequences were grown in four successive growing seasons: continuous growing of the susceptible rice cultivar Thihtatyin (rice-rice-rice-rice), four treatments of 1- season crop rotation sequences (rice-rice-chickpea-rice, rice-rice-black gram-rice, rice-rice-soybean-rice, rice-rice-cowpea-rice), and five treatments of 2-season crop rotation sequences (groundnut-rice-chickpea-rice, green gram-rice-black gram-rice, cowpea-rice-soybean-rice, sesame-rice-cowpea-rice, sunflower-rice-sesame-rice). Population densities of M. graminicola recovered from the rice plants and the nematode multiplication factors (Mf) in the soil in the continuous rice cropping sequence (rice-rice-rice-rice) was the highest among the ten cropping sequences. Lowest nematode Mf in the soil was observed in the 2-season crop rotation sequence sunflower-rice-sesame-rice and the highest was observed in the 1-season crop rotation sequence rice-rice-cowpea-rice among the nine crop rotation sequences. Highest rice yield was obtained in the 2-season crop rotation sequences green gram-rice-black gram-rice, sesame-rice-cowpea-rice and sunflower-rice-sesame-rice, which were about 2 times higher compared with the 1-season crop rotation sequences and about 3 times higher compared with the continuous rice cropping sequence.  相似文献   

Spiro N‐methoxy piperidine ring containing aryldiones for the control of sucking insects and mites: discovery of spiropidion     

Michel Muehlebach  Anke Buchholz  Werner Zambach  Juergen Schaetzer  Miriam Daniels  Ottmar Hueter  Daniel P Kloer  Rob Lind  Peter Maienfisch  Andy Pierce  Thomas Pitterna  Tomas Smejkal  David Stafford  Laura Wildsmith 《Pest management science》2020,76(10):3440-3450

  相似文献   

Evaluation of cultural control and resistance‐breeding strategies for suppression of whitefly infestation of cassava at the landscape scale: a simulation modeling approach     

Hazel Parry  Andrew Kalyebi  Felix Bianchi  Peter Sseruwagi  John Colvin  Nancy Schellhorn  Sarina Macfadyen 《Pest management science》2020,76(8):2699-2710

  相似文献   

Assessment of insecticidal effects and selectivity of CAPA‐PK peptide analogues against the peach‐potato aphid and four beneficial insects following topical exposure     

Shun‐Hua Gui  Clauvis NT Taning  Kristof De Schutter  Qun Yang  Pengyu Chen  Mohamad Hamshou  Ronald J Nachman  Aniruddha A Pandit  Julian AT Dow  Shireen Davies  Guy Smagghe 《Pest management science》2020,76(10):3451-3458

  相似文献