One‐pot synthesis of anilides,herbicidal activity and molecular docking study          下载免费PDF全文

Suélen K Sartori  Elson S Alvarenga  Cristiane A Franco  Danielle S Ramos  Denilson F Oliveira 《Pest management science》2018,74(7):1637-1645

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Microalgal paste production of the diatom <Emphasis Type="Italic">Chaetoceros calcitrans</Emphasis> using electrolytic flocculation method at optimum culture conditions     

Milagros R. de la Peña  Annie Villa Franco  Hermoso P. IgcasanJr  Mary Dianne Grace N. Arnaldo  Ramil M. Piloton  Soledad S. Garibay  Vicente T. Balinas 《Aquaculture International》2018,26(4):1119-1134

The optimum culture conditions of the local strain Chaetoceros calcitrans were determined to improve biomass and reduce cost of production. Under outdoor culture conditions, higher cell density was attained when the cultures were enriched with Tungkang Marine Research Laboratory (TMRL) medium composed of cheap technical grade reagents and cultured at 25 g L^?1 salinity. The cultures were lighted with two 40 W cool-white GE fluorescent tubes (24–35 μmol photon m^?2 s^?1). Using semi-continuous culture system under established optimum culture conditions, C. calcitrans can be re-cultured thrice and concentrated at each culture cycle using electrolytic flocculation method to produce 4.6 kg m^?3 of diatom paste. The viability of concentrated C. calcitrans after 3 months of storage was comparable to live diatom cells. Simple preservation technique by low-temperature storage is convenient for storing algal concentrates for use as starter cultures and for feeding invertebrates. The paste costs USD 8.24 kg^?1 inclusive of the assets and flocculation materials for culturing and harvesting the diatom, respectively. This study established the suitable conditions for mass culture of C. calcitrans and produced concentrated diatoms in paste form that is readily available for aquaculture hatcheries at a lower cost.  相似文献   

Study of Analytical Techniques to Determine Chlorpyrifos in the Surface Waterways of the Rural Zone of Ouro Branco,Brazil: A Case Study     

Taciana Maria da Silveira  Renata Domingos Alves  Maria Eliana Lopes Ribeiro de Queiroz  Antônio Augusto Neves  Maurício Xavier Coutrim  Robson José de Cássia Franco Afonso  Gilmare Antônia da Silva 《Water, air, and soil pollution》2016,227(9):335

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New Insect Host Defense Peptides (HDP) From Dung Beetle (Coleoptera: Scarabaeidae) Transcriptomes     

Germn Alberto Tllez Ramirez  Juan Felipe Osorio-Mndez  Diana Carolina Henao Arias  Lily Johanna Toro S.  Juliana Franco Castrilln  Maribel Rojas-Montoya  Jhon Carlos Castao Osorio 《Journal of insect science (Online)》2021,21(4)

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Water and oil-repellent coatings of perfluoro-polyacrylate resins on cotton fibers: UV curing in comparison with thermal polymerization     

Franco Ferrero  Monica Periolatto  Claudia Udrescu 《Fibers and Polymers》2012,13(2):191-198

UV curing of perfluoro-alkyl-polyacrylate resins able to impart water as well as oil-repellency to cotton fabrics was studied in comparison with conventional thermal polymerization. The process was assessed through weight gain and gel content measurements while the properties conferred to cotton fabrics were determined in terms of water and oil contact angles, moisture adsorption, and water vapor permeability. The polymerization yields were of the same order (>80 %) of those obtained with thermal curing as well as the high contact angles with water (>127°) and oil (>118°) even at low resin add-on (3 %). UV cured resins yielded oil contact angles mostly higher than 120° denoting super oil-repellent surfaces. Moreover the water and oil-repellency was adequately maintained after washing. The moisture adsorption of finished fabrics was lower than that of untreated cotton, but slightly higher for UV cured than thermally treated fabrics. Water vapor transmission rate showed that the finish treatment, thermal as well as by UV curing, does not reduce the breathability of the original cotton. DSC analysis demonstrated that the fiber pyrolysis is affected by the polymer add-on, while FTIR-ATR spectra of all finished fabrics showed typical peaks of ester and C-F groups. XPS analysis showed small differences between thermal and UV curing coatings with each resin, while coatings with the lowest percentage of fluorine groups did not affect the water and oil-repellency.  相似文献   

Ameliorative effects of nurse shrubs on soil chemical characteristics are driven by plant size in the Monte desert     

Omar Varela  Mariana Varas  Donna Rattalino  Franco Crabbè  Mariano Ordano 《Arid Land Research and Management》2017,31(4):418-430

In deserts, shrubs determine landscape structure and influence plant productivity by creating nutrient-enriched environments. Attributes vary among shrub species, thus their contribution to soil characteristics is expected to vary as well, and nutrient input under shrub cover will depend on species attributes. We propose that plant size determines the contribution to soil chemical characteristics. Therefore, the contribution of larger species will be higher than smaller ones. Also, each species will contribute differentially for each chemical parameter. To corroborate these premises, we measured six soil chemical characteristics in areas covered by shrubs and in bare soil, as well as among five nurse species, in four sites of the Monte desert (La Rioja, Argentina). A multivariate analysis of variance (MANOVA) indicated significant variation between cover conditions and locations. Supporting previous studies, the presence of shrubs improved soil properties. Chemical concentration between soils under shrubs and bare soils, respectively, showed as mean and (SD) were: carbon(%): 0.82 (0,47), 0.52 (0.22); nitrates (ppm): 33,33 (67,36), 2.63 (0.56); phosphorous(ppm): 16.76 (25.02), 6.56 (1.92); electrical conductivity (dS m^?1): 0.24 (0,43), 0.03 (0,02); pH: 6.93 (0.56), 7.62 (0.53); and water content (%): 3,17 (8.94), 2.47 (9.15). Chemical characteristics also varied according to the nurse species. Larger nurse species affected the ensemble of chemical characteristics, after controlling for cover condition and site. Larger plant species (Bulnesia retama, Prosopis torquata, and Zuccagnia punctata) were significantly associated with higher carbon and higher nitrates concentration. These results suggest that soil properties are enhanced by the size of nurse plant species.  相似文献   

Lime and Nutrients Effects on Jatropha curcas Cultivated on an Amazonian Soil     

José Zilton Lopes Santos  Bruno Fernando Faria Pereira  José Augusto Figueira da Silva  Carlos Alberto Franco Tucci  Sílvio Vieira da Silva  Tainah Manuela Benlolo Barbosa 《Communications in Soil Science and Plant Analysis》2017,48(11):1280-1290

We evaluated the effects of macronutrient and micronutrient omission, and of liming, on Jatropha curcas (JC) in greenhouse study. The experimental design was a factorial combination of 2 liming treatments (nil or 4.5 t. ha^?1 of dolomitic lime) x 7 combinations of fertility status, with five replications. The concentrations and uptake of nutrients by JC plants follow the order: nitrogen > potassium > calcium ≥ Magnesium > sulfur > phosphorus > iron > boron > manganese > zinc > copper (N > K > Ca ≥ Mg > S > P > Fe > B > Mn > Zn > Cu), but the growth of JC plants was negatively affected mainly by omission of macronutrients, in the following order: P > N = K = S, on limed soil. Phosphorus is the most critical element for development. JC is responsive to micronutrients only when applied together with macronutrients. Potassium chloride is not recommended as K⁺ source for JC crop. Lime is recommended to improve growth and nutritional status of JC plants.  相似文献   

Can facultative parthenogenesis occur in biparental mealybug species?     

Elsa Borges da Silva  Zvi Mendel  José Carlos Franco 《Phytoparasitica》2010,38(1):19-21

The existence of facultative parthenogenesis in mealybugs has been reported by different authors and questioned by others in relation to certain species. We tested the hypothesis of facultative parthenogenesis in relation to three mealybug species, Planococcus citri (Risso), Pseudococcus calceolariae (Maskell) and Pseudococcus viburni (Signoret). The results suggest that these mealybug species are obligate amphimictic.  相似文献   

Climate change and oak growth decline: Dendroecology and stand productivity of a Turkey oak (<Emphasis Type="Italic">Quercus cerris</Emphasis> L.) old stored coppice in Central Italy     

Alfredo Di Filippo  Alfredo Alessandrini  Franco Biondi  Silvia Blasi  Luigi Portoghesi  Gianluca Piovesan 《Annals of Forest Science》2010,67(7):706-706

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• We combined stem volume increment analysis with dendroecological tools to address two unresolved issues concerning oak dieback in Mediterranean areas: early detection of changes in stand growth, and identification of mechanisms for observed growth declines.  相似文献    90. Multiply-primed rolling-circle amplification (MPRCA) of PCV2 genomes: Applications on detection, sequencing and virus isolation      Diogenes Dezen  Franciscus Antonius Maria Rijsewijk  Thais Fumaco Teixeira  Carine Lidiane Holz  Samuel Paulo Cibulski  Ana Cláudia Franco  Odir Antonio Dellagostin  Paulo M. Roehe 《Research in veterinary science》2010,88(3):436-440 Multiply-primed rolling-circle amplification (MPRCA) was used to amplify porcine circovirus type 2 (PCV2) genomes isolated from tissues of pigs with signs of post-weaning multisystemic wasting syndrome (PMWS). Two of the amplified PCV2 genomes were cloned in prokaryotic plasmids and sequenced. Both were nearly identical (1767 nt) except for one silent substitution in the region coding for the capsid protein (ORF2). In addition, they showed high nucleotide sequence similarity with PCV2 isolates from others countries (93–99%). To investigate whether the MPRCA amplified PCV2 genomes could be used to produce infectious virus, the cloned genomes were isolated from the plasmids, recircularized and used for transfection in PK-15 cells. This procedure led to the production of infectious virus to titres up to 105.55 TCID50/mL. It was concluded that MPRCA is a useful tool to amplify PCV2 genomes aiming at sequencing and virus isolation strategies, where particularly useful is the fact that it allows straightforward construction of PCV2 infectious clones from amplified genomes. However, it was less sensitive than PCR for diagnostic purposes.  相似文献    [首页] « 上一页 [4] [5] [6] [7] [8] 9 [10] [11] [12] [13] [14] 下一页 » 末  页»