High-throughput synthesis of zeolitic imidazolate frameworks and application to CO2 capture   总被引：2，自引：0，他引：2  

Banerjee R  Phan A  Wang B  Knobler C  Furukawa H  O'Keeffe M  Yaghi OM 《Science (New York, N.Y.)》2008,319(5865):939-943

A high-throughput protocol was developed for the synthesis of zeolitic imidazolate frameworks (ZIFs). Twenty-five different ZIF crystals were synthesized from only 9600 microreactions of either zinc(II)/cobalt(II) and imidazolate/imidazolate-type linkers. All of the ZIF structures have tetrahedral frameworks: 10 of which have two different links (heterolinks), 16 of which are previously unobserved compositions and structures, and 5 of which have topologies as yet unobserved in zeolites. Members of a selection of these ZIFs (termed ZIF-68, ZIF-69, and ZIF-70) have high thermal stability (up to 390 degrees C) and chemical stability in refluxing organic and aqueous media. Their frameworks have high porosity (with surface areas up to 1970 square meters per gram), and they exhibit unusual selectivity for CO2 capture from CO2/CO mixtures and extraordinary capacity for storing CO2: 1 liter of ZIF-69 can hold approximately 83 liters of CO2 at 273 kelvin under ambient pressure.  相似文献   

Modeling Complex Spatial Dependencies: Low-Rank Spatially Varying Cross-Covariances With Application to Soil Nutrient Data     

Rajarshi Guhaniyogi  Andrew O. Finley  Sudipto Banerjee  Richard K. Kobe 《Journal of Agricultural, Biological & Environmental Statistics》2013,18(3):274-298

Advances in geo-spatial technologies have created data-rich environments which provide extraordinary opportunities to understand the complexity of large and spatially indexed data in ecology and the natural sciences. Our current application concerns analysis of soil nutrients data collected at La Selva Biological Station, Costa Rica, where inferential interest lies in capturing the spatially varying relationships among the nutrients. The objective here is to interpolate not just the nutrients across space, but also associations among the nutrients that are posited to vary spatially. This requires spatially varying cross-covariance models. Fully process-based specifications using matrix-variate processes are theoretically attractive but computationally prohibitive. Here we develop fully process-based low-rank but non-degenerate spatially varying cross-covariance processes that can effectively yield interpolate cross-covariances at arbitrary locations. We show how a particular low-rank process, the predictive process, which has been widely used to model large geostatistical datasets, can be effectively deployed to model non-degenerate cross-covariance processes. We produce substantive inferential tools such as maps of nonstationary cross-covariances that constitute the premise of further mechanistic modeling and have hitherto not been easily available for environmental scientists and ecologists.  相似文献   

Using noise reduction to enhance ranking based genomic selection     

Banerjee  Rohan  Singh  Manish 《Genetic Resources and Crop Evolution》2021,68(8):3319-3331

Genetic Resources and Crop Evolution - Genomic Selection (GS) is a breeding technique that utilizes whole genome markers to make trait predictions. The goal of GS is to identify the top candidates...  相似文献   

Immunization of Crossbred Cattle (Bos indicus×Bos taurus) with Fractionated Midgut Antigens against Hyalomma anatolicum anatolicum     

Banerjee DP  Kumar R  Kumar S  Sengupta PP 《Tropical animal health and production》2003,35(6):509-519

Crossbred calves (Bos indicus×Bos taurus) were immunized with a fractionated midgut supernate antigen (GS-F Ag from Hyalomma anatolicum anatolicum). The first inoculation on day 0 was given intramuscularly after emulsification with Freund's complete adjuvant; the second was given subcutaneously on day 14 in incomplete Freund's adjuvant; and the third on day 35 was given subcutaneously without adjuvant. Each injection comprised 1 mg of antigen protein. Ten days after the last inoculation, the immunized calves were challenged simultaneously with 1000 larvae and 20 pairs (20 males and 20 females) of adult H. a. anatolicum on one ear and a similar number of Hyalomma dromedarii ticks on the other ear. There was a significant decrease in the percentage larval engorgement and larval rejection of up to 34% on the immunized calves. A significant increase in the engorgement and preoviposition periods and a significant decrease in the engorged weight, egg mass weight and reproductive index were observed for adult female ticks when fed on the immunized calves. The GS-F Ag also induced a considerable degree of cross-protection in calves against H. dromedarii larval ticks.  相似文献   

Tomato leaf curl Gujarat virus, a New Begomovirus Species Causing a Severe Leaf Curl Disease of Tomato in Varanasi, India     

Chakraborty S  Pandey PK  Banerjee MK  Kalloo G  Fauquet CM 《Phytopathology》2003,93(12):1485-1495

ABSTRACT The biological and molecular properties of Tomato leaf curl Gujarat virus from Varanasi, India (ToLCGV-[Var]) were characterized. ToLCGV-[Var] could be transmitted by grafting and through whitefly transmission in a persistent manner. The full-length genome of DNA-A and DNA-B of ToLCGV-[Var] was cloned in pUC18. Sequence analysis revealed that DNA-A (AY190290) is 2,757 bp and DNA-B (AY190291) is 2,688 bp in length. ToLCGV-[Var] could infect and cause symptoms in tomato, pepper, Nicotiana benthamiana, and N. tabacum when partial tandem dimeric constructs of DNA-A and DNA-B were co-inoculated by particle bombardment. DNA-A alone also is infectious, but symptoms were milder and took longer to develop. ToLCGV-Var virus can be transmitted through sap inoculation from infected tomato plants to the above-mentioned hosts causing the same symptoms. Open reading frames (ORFs) in both DNA-A and DNA-B are organized similarly to those in other begomoviruses. DNA-A and DNA-B share a common region of 155 bp with only 60% sequence identity. DNA-B of ToLCGV-[Var] shares overall 80% identity with DNA-B of Tomato leaf curl New Delhi virus-Severe (ToLCNDV-Svr) and 75% with ToLCNDV-[Lucknow] (ToLCNDV-[Luc]). Comparison of DNA-A sequence with different begomoviruses indicates that ToLCGV-[Var] shares 84% identity with Tomato leaf curl Karnataka virus (ToLCKV) and 66% with ToLCNDV-Svr. ToLCGV-[Var] shares a maximum of 98% identity with another isolate of the same region (ToLCGV-[Mir]; AF449999) and 97% identity with one isolate from Gujarat (ToLCGV-[Vad]; AF413671). All three viruses belong to the same species that is distinct from all the other geminivirus species described so far in the genus Begomovirus of the family Geminiviridae. The name Tomato leaf curl Gujarat virus is proposed because the first sequence was taken from an isolate of Gujarat, India.  相似文献   

Perineal urethrotomy in acute urinary retention of dogs     

B J Banerjee 《The Indian veterinary journal》1968,45(3):256-262

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Prevalence and molecular characterization of bovine Cryptosporidium isolates in India     

Paul S  Chandra D  Ray DD  Tewari AK  Rao JR  Banerjee PS  Baidya S  Raina OK 《Veterinary parasitology》2008,153(1-2):143-146

A survey based on PCR assay of 18S SSU rRNA gene revealed a 30.2% infection with Cryptosporidium spp., out of 457 faecal samples collected from neonatal bovine calves across three different regions of India. The PCR-RFLP pattern of the gene in all the positive cases established the species as Cryptosporidium parvum. Highest prevalence was recorded in the monsoon months (37.3%) and in the calves showing acute diarrhoea (32.3%). The calves below 15 days of age were mostly affected (45.1%). The infection was more prevalent in the northern parts (35.4%) of the country than in the eastern or southern parts. Results indicated that C. parvum was the only species of Cryptosporidium prevalent in bovine calves in three different geographical regions of India.  相似文献   

Pharmacokinetics and distribution of ampicillin in plasma,milk and uterine fluid of female buffaloes     

C. Jayachandran  M. K. Singh  N. C. Banerjee 《Veterinary research communications》1990,14(1):47-51

A pharmacokinetic study of ampicillin (6 mg/kg intravenous) revealed that the peak concentrations of 17.81±1.25, 5.64±2.24 and 1.09±0.10 g/ml of the drug were attained at 15 min, 30 min and 2 h in plasma, milk and uterine fluid respectively. A therapeutic concentration of 0.1 g/ml was maintained from 15 min–8 h, 15 min–6 h and 30 min–6 h in plasma, milk and uterine fluid. Hence, the drug may be used effectively in mammary gland and uterine infections apart from its use in other systemic infections.  相似文献   

Degradation kinetics and safety evaluation of tetraconazole and difenoconazole residues in grape   总被引：3，自引：0，他引：3  

Banerjee K  Oulkar DP  Patil SH  Dasgupta S  Adsule PG 《Pest management science》2008,64(3):283-289

BACKGROUND: Tetraconazole and difenoconazole are triazole fungicides with proven bioefficacy against grapevine powdery mildew disease. In the present work, the authors explored the residue dynamics of these two compounds in grapes and determined their preharvest intervals (PHIs) corresponding to multiple field applications at recommended and double rates considering the most critical use pattern in Indian viticulture. A confirmatory residue analysis method was validated for trace-level determination of both the compounds. RESULTS: Dissipation of both the fungicides followed non-linear two-compartment first + first-order rate kinetics. Tetraconazole and difenoconazole dissipated with PHIs of 12.5 and 25.5 days at recommended rates and of 28.5 and 38.5 days at double application rates respectively. On all the sampling days, the residues were below the maximum permissible intake, indicating consumer safety. The residues in the grape samples drawn from the farms where these two fungicides were applied, maintaining the above PHIs, were below their respective MRLs. CONCLUSION: The rate of degradation of tetraconazole was faster than that of difenoconazole. Thus, the growers will have the choice of using these new chemicals for the management of powdery mildews in succession, difenoconazole at early growth stages, followed by tetraconazole during the last month before harvest. The recommendations of PHIs proved to be effective in minimizing residues in farm grape samples. Thus, this work is of high significance to the grape industry of India, and will support the registration of these new fungicides for effective management of powdery mildews with minimum residue problems.  相似文献   

Improvement of nutritive value of sesame oilseed meal in formulated diets for rohu,Labeo rohita (Hamilton), fingerlings after fermentation with two phytase-producing bacterial strains isolated from fish gut     

Tanami Roy  Goutam Banerjee  Suhas Kumar Dan  Pinki Ghosh  Arun Kumar Ray 《Aquaculture International》2014,22(2):633-652

Eight isonitrogenous (approximately 35 % crude protein) and isocaloric (17.58 kJ g^?1) diets incorporating raw and fermented sesame oilseed meal replacing other feed ingredients including fishmeal at 10, 20, 30 and 40 % levels by weight into a fishmeal-based reference diet (RD) were fed to rohu, Labeo rohita, fingerlings (mean initial weight 3.19 ± 0.09 g) for 80 days. Two phytase-producing bacterial strains (LF1 and LH1 of Bacillus licheniformis) isolated from the foregut and hindgut regions of adult L. rohita were used for fermentation of oilseed meal for 15 days at 37 ± 2 °C. Fermentation of sesame seed meal was effective in significantly reducing the crude fibre content and anti-nutritional factors such as tannins and phytic acid and enhancing available free amino acids, free fatty acids and mineral concentration. In terms of growth, feed conversion ratio and protein efficiency ratio, 30 % fermented oilseed meal incorporated diet resulted in a significantly (P < 0.05) better performance of rohu fingerlings. In general, growth and feed utilization efficiencies of diets containing fermented oilseed meal were superior to diets containing raw meal. The apparent digestibility of protein, lipid, ash and minerals (phosphorus, calcium, manganese, copper and iron) was significantly (P < 0.05) higher in fish fed diet containing 30 % fermented oilseed meal in comparison with those fed RD. The maximum deposition of protein in the carcass was recorded in fish fed the diet containing 30 % fermented seed meal.  相似文献