Simulation of Effect of Stack Dimensions and Stacking Arrangement on Cool-down Characteristics of Potato in a Cold Store by Computational Fluid Dynamics   总被引：2，自引：0，他引：2  

M.K. Chourasia  T.K. Goswami   《Biosystems Engineering》2007,96(4):503-515

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Development of two cell culture systems from Asian seabass Lates calcarifer (Bloch)   总被引：1，自引：0，他引：1  

Wazir S Lakra  Nachimuthu Sivakumar  Mukunda Goswami  & Ramesh R Bhonde 《Aquaculture Research》2006,37(1):18-24

Two new cell culture systems namely epitheloid cells of Lates (LCE) and fibroblastic cells of Lates (LCF) have been developed from fry and fingerling of the economically important brackishwater fish Lates calcarifer. Primary cultures were initiated by explant technique using caudal fin of fingerling and whole body tissue of the fry. The nutritional requirements and the growth pattern in response to different culture environment were similar for the two cell cultures. The culture medium used was Leibovitz‐15 supplemented with 20% fetal bovine serum (FBS) and 1% fish serum. The LCE comprised of epithelioid cells and LCF cells were fibroblastic. With a split ratio of 1:2, the confluency of cells was attained in 8–10 days at an incubation temperature of 28°C. The cells were found to grow well in a wide range of temperature (24–32°C) and stable at 20 and 36°C. The growth rate of LCF and LCE cells increased proportionately with the concentration of FBS from 5% to 20%. A decrease of serum level to 10% after eight subcultures produced no apparent change in cell morphology and growth rate. The viability of cells was found to be 70% when revived after a month of storage in liquid nitrogen (?196°C).  相似文献   

Influence of Benzyladenine on Leaf Senescence and Photosynthesis in Sunflower (Helianthus annuus L.)     

G. C. Srivastava  B. K. Goswami 《Journal of Agronomy and Crop Science》1988,161(1):23-29

The effect of foliar application of benzyladenine on sunflower leaf senescence, photosynthesis, RuBP carboxylase activity and diffusion resistance was investigated. A considerable drop in photosynthetic rate and rise in diffusion resistance were noted dunng the seed filling period. Benzyladenine application maintained the chlorophyll content and chlorophyll a : b ratio at higher level, enhanced RuBP carboxylase activity and net photosynthesis in both upper and lower leaves. A lower level of diffusion resistance was also observed by benzyladenine application during seed filling period. The results suggested that application of benzyladenine at 30, 60 and 90 days after sowing could help to maintain photosynthesis and assimilate supply to the developing seeds of sunflower.  相似文献   

The Fusarium graminearum genome reveals a link between localized polymorphism and pathogen specialization     

Cuomo CA  Güldener U  Xu JR  Trail F  Turgeon BG  Di Pietro A  Walton JD  Ma LJ  Baker SE  Rep M  Adam G  Antoniw J  Baldwin T  Calvo S  Chang YL  Decaprio D  Gale LR  Gnerre S  Goswami RS  Hammond-Kosack K  Harris LJ  Hilburn K  Kennell JC  Kroken S  Magnuson JK  Mannhaupt G  Mauceli E  Mewes HW  Mitterbauer R  Muehlbauer G  Münsterkötter M  Nelson D  O'donnell K  Ouellet T  Qi W  Quesneville H  Roncero MI  Seong KY  Tetko IV  Urban M  Waalwijk C  Ward TJ  Yao J  Birren BW  Kistler HC 《Science (New York, N.Y.)》2007,317(5843):1400-1402

We sequenced and annotated the genome of the filamentous fungus Fusarium graminearum, a major pathogen of cultivated cereals. Very few repetitive sequences were detected, and the process of repeat-induced point mutation, in which duplicated sequences are subject to extensive mutation, may partially account for the reduced repeat content and apparent low number of paralogous (ancestrally duplicated) genes. A second strain of F. graminearum contained more than 10,000 single-nucleotide polymorphisms, which were frequently located near telomeres and within other discrete chromosomal segments. Many highly polymorphic regions contained sets of genes implicated in plant-fungus interactions and were unusually divergent, with higher rates of recombination. These regions of genome innovation may result from selection due to interactions of F. graminearum with its plant hosts.  相似文献   

Ametryne metabolite in transpired-guttated water from sugarcane shoot     

K P Goswami  R E Green 《Journal of agricultural and food chemistry》1974,22(2):340-342

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Evapotranspiration losses for pepper under plastic mulch and shallow water table conditions     

S. Shukla  F. H. Jaber  D. Goswami  S. Srivastava 《Irrigation Science》2013,31(3):523-536

Use of literature crop coefficient (K _c) values for quantifying evapotranspiration (ET_c) under non-standard conditions such as plastic mulch, shallow water table, and sub-tropical conditions can lead to inaccurate ET_c estimates. A 5-year experiment was conducted for fall crop growing seasons in south Florida to quantity bi-weekly ET_c and K _c for bell pepper grown under shallow water table and plastic mulch environments using large drainage lysimeters. The ET_c values varied from 205 to 320 mm with a seasonal average of 267 mm. Average K _c values for bell pepper for development, mid-season, and late stages were 1.05, 1.21, and 1.28, respectively. Higher than literature initial K _c values were due to rainfall and use of sub-irrigation system to maintain artificially high water table which results in high soil moisture in the bare soil area—such high moisture results in high evaporation. The K _c values from this study were statistically higher than literature values. Use of literature K _c values resulted in underestimating ET_c by 27–37%. The K _c values would provide improved estimates of sub-irrigated pepper ET_c in subtropical Florida and elsewhere with similar environment.  相似文献   

Standardization of Rootstocks of Mango (Mangifera Indica L.)     

S. K. Mukherjee  P. K. Majumder  N. N. Bid  A. M. Goswami 《The Journal of Horticultural Science and Biotechnology》2013,88(1):83-87

Mango cuttings could be induced to form roots provided IBA at 5,000 p.p.m. in lanolin was applied at the base of shoots after removing a ring of bark while they were still attached to the mother tree.

Cuttings taken from one-month-old seedlings gave the highest percentage of rooting and establishment, but with increasing age of the mother plants the rooting was considerably reduced. The rooting of cuttings of different age groups could be improved by using shoots forced into vigorous growth by hard pruning. Younger plants responded better to such treatment than older ones.

Cuttings from etiolated shoots rooted better than those from non-etiolated, but etiolation was less effective in promoting rooting than invigoration by hard pruning. Etiolation and invigoration combined gave the highest percentage of rooting and establishment in all age groups.  相似文献   

Biochemistry of TBT-Degrading Marine Pseudomonads Isolated from Indian Coastal Waters     

Ramya Sampath  Harish Venkatakrishnan  Vijaya Ravichandran  Rajat Roy Chaudhury 《Water, air, and soil pollution》2012,223(1):99-106

Tributyltin (TBT) is a very effective biocide and an active ingredient in antifouling paints. Screening along the Indian coast yielded 49 bacterial isolates capable of TBT assimilation. The screening was done based on the ability of bacteria to grow in mineral salt medium (MSM) containing TBT as the sole source of carbon. All the isolates produced exopolysaccharides (biosurfactants) in the medium which aid in emulsification and thus ease bioavailability of TBT. Five isolates were identified as potent TBT degraders (namely, Pseudomonas pseudoalcaligenes, Pseudomonas stutzeri, Pseudomonas mendocina, Pseudomonas putida, and Pseudomonas balearica) based on their biomass production in MSM containing TBT as the sole source of carbon. In addition to evaluating the potential of individual bacterial strains, the study also focused on using a consortium of bacteria to explore their synergistic effect when grown on TBT. Further tests like growth profile, rhamnolipid secretion profile, extracellular protein secretion profile, and detection of siderophores were performed on these isolates when grown in MSM supplemented with 2 mM TBT concentration. Emulsification activity of the crude extracellular polysaccharides against kerosene was evaluated. It can be therefore inferred that TBT degradation by these marine pseudomonads is a two-step process: (a) dispersion of TBT in the aqueous phase and (b) tin–carbon bond cleavage by siderophores affecting debutylation of TBT. The consortium of bacteria may be effective in the treatment of TBT-contaminated waste water in dry docks.  相似文献   

Bekämpfung von Epilachna vigintioctopunctata (F.) und Spodoptera litura (F.) mit Silikaten     

Tanja Mucha-Pelzer  Nitai Debnath  Arunava Goswami  Inga Mewis  Christian Ulrichs 《Gesunde Pflanzen》2008,60(1):23-28

The present work deals with the insecticidal efficacy of different modified natural silica products against the field pests Epilachna vigintioctopunctata (F.) and Spodoptera litura (F.). The substances “Fossil Shield^® 90.0s”, “Advasan^®” as well as different formulations of a silica-derived substance named “AL06” (developed in the section Urban Horticulture, Humboldt-University Berlin) were dusted into gauze-covered cages. In each cage, test insects were placed and mortality measured over time. A 100% mortality rate was archieved two days after treatment of adult E. vigintioctopunctata and S. litura larvae with some silica “AL06”-formulations. In contrast, mortality rate for E. vigintioctopunctata larva was only 30 to 70% after two days of treatment. Mortality rate was dose dependend, even though a linear correlation could not be found. Furthermore, the commercial substance “Advasan^®” was able to control the horticultural pest E. vigintioctopunctata within 48 hours successfully. For future horticultural applications, possible phytotoxic side effects of silica dusts and an application technology resulting in adequate leaf coverage have to be considered.  相似文献   

Antifeedant activity and toxicity of leaf extracts from <Emphasis Type="Italic">Porteresia coarctata</Emphasis> Takeoka and their effects on the physiology of <Emphasis Type="Italic">Spodoptera litura</Emphasis> (F.)     

Christian Ulrichs  Inga Mewis  Sujit Adhikary  Atanu Bhattacharyya  Arunava Goswami 《Journal of pest science》2008,81(2):79-84

Antifeeding and toxic effects of chemical extracts from Porteresia coarctata Takeoka on the insect pest Spodoptera litura (F.) were investigated in the laboratory. Hexane extracts of P. coarctata leaves were re-dissolved in dimethyl sulfoxide and applied in water to leaves of Ricinus communis L. (castor). A concentration of 1,000 and 2,000 ppm extract exhibited significant antifeeding and toxic effects to third instar larvae when compared to the same concentration of dimethyl sulfoxide in water as control. One day after feeding on extract-treated castor leaves, the mortality of S. litura larvae was 50%. Mortality increased to 95% after 11 days at a dosage of 2,000 ppm. Compared to the control, third instar larvae fed on castor leaves treated with P. coarctata leaf extract at different concentrations showed significant reduction in protein and DNA content in the fat body and midgut tissues. Results demonstrate the insecticidal and antifeedant properties of P. coarctata leaf extract against the generalist pest S. litura leading to biochemical changes in the insect body. Thus, P. coarctata contains phytochemicals, and the extract, in crude and pure form, has potential as a botanical insecticide in alternative control strategies against Lepidoptera pests.  相似文献