238 research outputs found
Association of ribonuclease I with ribosomes and their subunits
No full textRNase I of Salmonella typhimurium has been purified to a homogeneous state. It has a molecular weight of 2 × 104. Association of RNase I with the 30 S subunits of ribosomes has been investigated by using an inhibition assay. 70 S ribosomes and 30 S subunits, but not the 50 S subunits, inhibit the hydrolysis of polyribonucleotides (only poly adenylic acid was used in the present investigation) by RNase I. This inhibition is Mg++-dependent. Each 30 S subunit appears to bind approximately 3 molecules of enzyme. The three-dimensional configuration of the ribosomes is essential for the inhibition since removal of even a small amount of protein by salt extraction leads to considerable loss of inhibitory activity; the detached proteins have no inhibitory activity. Although ribosomal RNA has some inhibitory activity, it is much less than that of the intact ribosomes. Reconstitution of the ribosomes from the salttreated particles and detached proteins leads to complete recovery of the inhibitory activity. This inhibition assay can be very conveniently used in measuring the purity of subunit preparations from 70 S ribosomes as well as in the study of the reconstitution of the ribosomes
Association of ribonuclease I with ribosomes and their subunits
No full textRNase I of Salmonella typhimurium has been purified to a homogeneous state. It has a molecular weight of 2 × 104. Association of RNase I with the 30 S subunits of ribosomes has been investigated by using an inhibition assay. 70 S ribosomes and 30 S subunits, but not the 50 S subunits, inhibit the hydrolysis of polyribonucleotides (only poly adenylic acid was used in the present investigation) by RNase I. This inhibition is Mg++-dependent. Each 30 S subunit appears to bind approximately 3 molecules of enzyme. The three-dimensional configuration of the ribosomes is essential for the inhibition since removal of even a small amount of protein by salt extraction leads to considerable loss of inhibitory activity; the detached proteins have no inhibitory activity. Although ribosomal RNA has some inhibitory activity, it is much less than that of the intact ribosomes. Reconstitution of the ribosomes from the salttreated particles and detached proteins leads to complete recovery of the inhibitory activity. This inhibition assay can be very conveniently used in measuring the purity of subunit preparations from 70 S ribosomes as well as in the study of the reconstitution of the ribosomes
Women in the Novels of Bankimchandra Chatterjee, Saratchandra Chatterjee and Rabindranath Tagore
No full textNot availabl
Information Technology Capability, Knowledge Assets and Firm Innovation
No full textIn this paper, the author presents a theoretical framework that establishes an indirect link between IT capabilities and firm innovation by characterizing the mediating role of knowledge assets: knowledge networks and knowledge capabilities. Firm innovation itself is characterized as innovation development and innovation commercialization. The search on literature of IT capability and innovation revealed a very lukewarm recognition towards firm level variables in knowledge networks, knowledge capabilities, and distinction between innovation development and commercialization. Backed up by detailed reviews of literature on innovation, strategy, and entrepreneurship, the author posits propositions linking the aforementioned constructs, and proposes a framework for future research linking IT Capability with Firm Innovation.</p
The role of Plasmodium falciparum var genes in malaria in pregnancy
No full textSequestration of Plasmodium falciparum-infected erythrocytes in the placenta is responsible for many of the harmful effects of malaria during pregnancy. Sequestration occurs as a result of parasite adhesion molecules expressed on the surface of infected erythrocytes binding to host receptors in the placenta such as chondroitin sulphate A (CSA). Identification of the parasite ligand(s) responsible for placental adhesion could lead to the development of a vaccine to induce antibodies to prevent placental sequestration. Such a vaccine would reduce the maternal anaemia and infant deaths that are associated with malaria in pregnancy. Current research indicates that the parasite ligands mediating placental adhesion may be members of the P. falciparum variant surface antigen family PfEMP1, encoded by var genes. Two relatively well-conserved subfamilies of var genes have been implicated in placental adhesion, however, their role remains controversial. This review examines the evidence for and against the involvement of var genes in placental adhesion, and considers whether the most appropriate vaccine candidates have yet been identified
On Oriental and Nearctic Cicadelloidea (Homoptera)
No full textSeven species belonging to the Tettigellidae and 1 to the Hylicidae are reviewed.
The structural dissimilitude of the genitalia affirm the distinctiveness of
each species. Those species implicated as vectors of virus transmission are noted
here for economic importance. The Nearctic species liad been identified by
Prof. P. W. OMAN, U. S. A.
Author remains grateful to the Director, Zoological Survey of India for all
necessary help afforded to carry on research work.Peer reviewe
OEDOGONIALES FROM DHULE AND NANDURBAR DISTRICT, MAHARASHTRA (INDIA)
No full text<p>During the study of systematic account Oedogoniales of Sakri and Navapur taluka, district Dhule and Nandurbar respectively, Maharashtra the author collected twenty-three taxa belonging to three genera. <em>Oedogonium</em> Hirn. is a dominant genus followed by <em>Bulbochaete </em>Hirn. while <em>Oedocladium</em> Hirn. is a monotypic. Out of twenty-three taxa <em>Oedogonium orientale</em> Jao and <em>Bulbochaete borealis</em> Hirn., are first time recorded from India. Four taxa are new record for Maharashtra and twelve taxa were recorded second time from Maharashtra. The Oedogoniales of this region have not been studied earlier. This is the first ever attempt to explore, enumerate and taxonomically evaluate the algal components of the area. Distribution of the taxa in India has been discussed. The quantitative availability of species is also noted. </p></jats:p
Perov5
No full textPlease consider citing the following two papers:
```
@article{castelli2012new,
title={New cubic perovskites for one-and two-photon water splitting using the computational materials repository},
author={Castelli, Ivano E and Landis, David D and Thygesen, Kristian S and Dahl, S{\o}ren and Chorkendorff, Ib and Jaramillo, Thomas F and Jacobsen, Karsten W},
journal={Energy \& Environmental Science},
volume={5},
number={10},
pages={9034--9043},
year={2012},
publisher={Royal Society of Chemistry}
}
```
```
@article{castelli2012computational,
title={Computational screening of perovskite metal oxides for optimal solar light capture},
author={Castelli, Ivano E and Olsen, Thomas and Datta, Soumendu and Landis, David D and Dahl, S{\o}ren and Thygesen, Kristian S and Jacobsen, Karsten W},
journal={Energy \& Environmental Science},
volume={5},
number={2},
pages={5814--5819},
year={2012},
publisher={Royal Society of Chemistry}
}
```</p
Measurement of the polarization amplitudes and triple product asymmetries in the B0s → Φ Φ decay
No full text<p>Using 1.0 fb−1 of pp collision data collected at a centre-of-mass energy of s√=7 TeV with the LHCb detector, measurements of the polarization amplitudes, strong phase difference and triple product asymmetries in the B0s→ϕϕ decay mode are presented. The measured values are</p>
<p>|A0|2=0.365±0.022(stat)±0.012(syst),|A⊥|2=0.291±0.024(stat)±0.010(syst),cos(δ∥)=−0.844±0.068(stat)±0.029(syst),AU=−0.055±0.036(stat)±0.018(syst),AV=0.010±0.036(stat)±0.018(syst).</p>
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