88 research outputs found
Antibiotic and heavy metal resistance properties of bacteria isolated from the aeration lagoons of common effluent treatment plant (CETP) of tannery industries (Unnao, India)
No full text514-519In the present
study, 12 aerobic bacterial strains were isolated from the common effluent
treatment plant (CETP) of tannery industries and identified as Alcaligenes sp. (FJ55942), Pantoea sp. (FJ55943), Bacillus
megaterium (FJ55944),
B. marisflavi (FJ55945), B. subtilis (FJ55946), B. megaterium (FJ55947),
B. cereus (FJ55948), B. pumilus (FJ55949), Pseudomonas sp. (FJ55950), Bacillus sp. (FJ55951), B. subtilis
(GU193980) and Klebsiella pneumoniae (GU193981) <span style="mso-bidi-font-style:
italic">having closest relationship with <i style="mso-bidi-font-style:
normal">Agrobacterium larrymoorie bacterium.<i style="mso-bidi-font-style:
normal"> Further, the results of antibiotic and heavy metal resistant
studies have shown that all the bacterial isolates of initial and final
aeration lagoons were intermediate for ciprofloxacin and tetracycline, except Alcaligenes sp. and Pantoea sp. In addition, the bacterial isolates
of initial aeration lagoon have shown a wide range of MIC values ranging from
90-650, 60-250, 150-800, 600-700, 400-650, 90-600, 400-600 and 60-500 µg mL-1
for Cr, Cu, Zn, Fe, Ni, Pb, Mo and As; while that of final aeration lagoon, it
was 140-600, 60-250,
600-700, 550-700, 400-650, 100-300, 400-650 and 200-400 µg mL-1 for
Cr, Cu, Zn, Fe, Ni, Pb, Mo and As, respectively. All these bacterial isolates
were found to have a wide range of multi-drug and multi-metal resistant
property, indicating that industrial effluents are organically enriched medium
supporting the fast growth and spreading of antibiotics and heavy metals
resistant microbes in the environment.
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Unprecedented influence of remote substituents on reactivity and stereoselectivity in Cu(I)-catalysed [2 + 2] photocycloaddition. An approach towards the synthesis of tricycloclavulone
No full textCu(I)-catalysed [2 + 2] photocycloaddition of 1,6-dienes embedded in a furano sugar is described in connection to a synthetic approach to an abnormal marine prostanoid tricycloclavulone. An unprecedented influence of remote substituents on the reactivity and stereoselectivity of the photocycloaddition reaction has been uncovered during this investigation. While an alkene substituent inhibits cycloaddition through steric effects, a substituent having a hydroxyl or alkoxy group at the same location facilitates cycloaddition exclusively from its own side. This investigation has led to the synthesis of a functionalised 5,4-fused core unit of tricycloclavulone
Unprecedented copper(I)-catalyzed photochemical reaction of diethyl ether with vicinal diols and ketals
No full textA novel Cu(I)-catalyzed photochemical reaction of diethyl ether with vicinal diols and their ketals is reported. The most remarkable feature is the transformation of 1,2-diols and their ketals to acetals of acetaldehyde under totally neutral condition without using acetaldehyde
An efficient stereo selective route to the construction of tricyclic core structure towards the synthesis of the sesquiterpenes of the seco-prezizaanefamily
No full textAn efficient stereoselective approach to the construction of a hydrindane derivative having a bridged lactone is described toward the synthesis of the sesquiterpenes of the seco-prezizaane family. The key step involves RO-RCM of a norbornene derivative
Influence of diene substituent position on the stereochemical outcome in IMDA reaction of decatrienones. An asymmetric synthesis of C<SUB>10</SUB>- epi-dihydro-epi-deoxy arteannuin B
No full textAn asymmetric synthesis of C10-epi-dihydro-epi-deoxy arteannuin B is reported employing an IMDA reaction of sugar embedded decatrienone. During this investigation it has been demonstrated that changing the position of the methyl group on the diene moiety changes the stereochemical outcome leading to access to either cis- or trans-decalin derivatives exclusively
CARBON DIOXIDE-MEDIATED PREPARATION OF PYRROLES IN WATER FOLLOWING PAAL KNORR METHOD
Get PDFCarbon dioxide-mediated new reaction of 2,5-hexanedione and primary amino compounds in water-THF produced N-substituted pyrroles in excellent yield. This method for the preparation of pyrroles is novel, simple, and efficient
Dynamic Selection of Optimal Cloud Service Provider for Big Data Applications
No full textBig data analytics and Cloud computing are the two most imperative innovations in the current IT industry. In a surprise, these technologies come up together to convey the effective outcomes to various business organizations. However, big data analytics require a huge amount of resources for storage and computation. The storage cost is massively increased on the input amounts of data and requires innovative algorithms to reduce the cost to store the data in a specific data centers in a cloud. In Today’s IT Industry, Cloud Computing has emerged as a popular paradigm to host customer, enterprise data and many other distributed applications. Cloud Service Providers (CSPs) store huge amounts of data and numerous distributed applications with different cost. For example Amazon provides storage services at a fraction of TB/month and each CSP having different Service Level Agreements with different storage offers. Customers are interested in reliable SLAs and it increases the cost since the number of replicas are more. The CSPs are attracting the users for initial storage/put operations and get operations from the cloud becomes hurdle and subsequently increases the cost. CSPs provides these services by maintaining multiple datacenters at multiple locations throughout the world. These datacenters provide distinctive get/put latencies and unit costs for resource reservation and utilization. The way of choosing distinctive CSPs data centers, becomes tricky for cloud users those who are using the distributed application globally i.e. online social networks. In has mainly two challenges. Firstly, allocating the data to different datacenters to satisfy the SLO including the latency. Secondly, how one can reserve the remote resource i.e. memory with less cost. In this paper we have derived a new model to minimize the cost by satisfying the SLOs with integer programming. Additionally, we proposed an algorithm to store the data in a data center by minimizing the cost among different data centers and the computation of cost for put/get latencies. Our simulation works shows that the cost is minimized for resource reservation and utilization among different datacenters. </jats:p
Dynamic mechanical characterization of PC/MWCNT composites under variable temperature conditions
No full textLong-term user engagement in recommender systems: a review
Get PDFThe purpose of recommender systems (RS) is to facilitate user collaboration and communication on the platform. Nevertheless, there is limited knowledge regarding the extent of this relationship and the techniques by which RS could promote persistent user engagement with the platform. In order to fill this void, the present study investigates the role of RS in transforming users’ short-term engagement with the RS into long-lasting involvement with the platform. We present a theoretical framework by reviewing relevant literature in the domains of RS and user engagement to probe these issues. We provide open challenges in this field along with metrics in the present study
ChemInform Abstract: Unprecedented Copper(I)-Catalyzed Photochemical Reaction of Diethyl Ether with Vicinal Diols and Ketals.
No full text- …
