Classical and quantum speed limits

The new bound on quantum speed limit (in terms of relative purity) is derived by applying the original Mandelstam-Tamm one to the evolution in the space of Hilbert-Schmidt operators acting in the initial space of states. It is shown that it provides the quantum counterpart of the classical speed limit derived in Phys. Rev. Lett. 120 (2018), 070402 and the ℏ→0 limit of the former yields the latter. The existence of classical limit is related to the degree of mixing of the quantum state.

Extraction and Characterization of Lipopolysaccharide from Salmonella typhi

There is no standard process available for high purity LPS isolation, and it may be appropriate to mix two purification steps. For Salmonella typhi LPS that were subjected to normal microbiological & biochemical screening protocols, updated phenol-water extraction protocol & non-phenolic extraction methods were also used in present research. Pellet of crude LPS obtained with wet weight was 2.0 gm. yield of LPS was more by hot phenol method 1.94 mg/ml as compared to non-phenolic method 0.40 mg/ml. relative purity of LPS obtained by hot phenol method was more as compared to non-phenolic method, as protein content was 23.60 mg/ml in LPS extracted from hot phenol method & 26.62 mg/ ml in LPS extracted from non-phenolic method. However, Nucleic acid contain was comparable in LPS extracted from both methods. Qualitative analysis showed ladder like bands of LPS extracted by hot phenol method as compared to single band obtained for LPS extracted by non-phenolic method. Findings of silver staining clearly revealed ladder pattern of multi-rung bands that are characteristics of smooth form of gram negative bacteria due to difference in length of carbohydrate chain of O-antigen component. In order to clarify diseased conditions & better work on LPS profiling, this research may be crucial to lead to more successful diagnosis and care.

ALTERNATIF PENGGUNAAN SILIKA BENTONIT SEBAGAI PENGGANTI FENOL-KLOROFORM-ISOAMIL ALKOHOL DALAM EKSTRAKSI DNA SECARA LANGSUNG DARI TANAH HUTAN MANGROVE

Research on comparing the metagenomic DNA extraction from mangrove forest soil with phenol-chloroform-isoamyl alcohol and with silica bentonite was conducted. The purpose of this study was to find the differences in quality and quantity of metagenomic DNA extracted. The silica bentonite was compared to meet the Green Chemistry concept. The metagenomic DNA from these extractions were analyzed by agarose gel electrophoresis and UV-Vis spectrophotometry. The results of electrophoresis showed that metagenomic DNA extracted with silica bentonite were relatively higher in concentration than with phenol-chloroform-isoamyl alcohol; but integrity of their DNA were the same. The results of UV-Vis spectrophotometry analysis showed that A260/230 ratio of the phenol-chloroform-isoamyl alcohol extract had higher relative purity level to humic acid. The A260/280 ratio of the final elution of the silica bentonite extraction showed the highest relative purity level to protein.

Surface Refining by Laser Scanning on Silicon Wafers

A YAG continue-wave laser has been used to refine the surface of silicon wafers in this study. During laser scanning, the irradiated region of the surface of the wafer experienced melting and subsequent recrystallization, which results in a redistribution of metal impurities in the molten pool along the depth direction. Cross-sectional micrographs of irradiated wafers have a clear boundary, which confirms the process of recrystallization, and the depth of molten region depends on the scanning parameters and the size of wafer. Secondary ion mass spectrometry measurements have been carried out to characterize the concentration of metal impurities. After redistribution of metal impurities, a final relative purity region was formed close to the surface. SIMS measurements demonstrate that the metal impurity concentration of the purity region has significantly reduced. The mechanism of the redistribution process of metal impurities in the molten pool has been qualitatively analyzed. All of the experimental results support that the CW laser scanning technology can effectively refine the specific surfaces of silicon wafers, and this technology has a great potential in the field of solar cells.

Baby Ghosts: Child Spirits and Contemporary Conceptions of Childhood in Thailand

The currently popular practice of propitiating, or ‘adopting’, child spirits in Thailand reveals an ambivalent attitude towards childhood. According to Buddhist scholars on childhood, Buddhist conceptions of children do not differentiate children in significant ways from adults in terms of their relative purity or innocence, as both children and adults possess countless lifetimes of karma; children are thus agentive beings, although not yet fully realised as adults. The child ghosts reflect the complex, competing conceptions of childhood, where they are both valuable resources to be deployed in the assistance of their families, and vulnerable beings in need of adult caretaking. Child ghosts are markers of both material and sentimental resources for their adoptive parents, or ‘guardians’. This article explores representations of child ghosts in popular media, and investigates child ghost propitiation practices through interviews with child ghost guardians. In addition, an overview is provided of the various categories of child ghosts, including kumanthong, kuman-thep, kuman-phrai, luk-krok, and rak-yom.

“To Defer and Not to Hasten”: The Anabaptist and Baptist Appropriations of Tertullian's Baptismal Theology

Regardless of the historiographical arguments made over the course of the last century regarding the relationship between Baptists and Anabaptists in the seventeenth century, every historian of Christianity must concede at least a typological connection between the two movements. Seventeenth-century Baptists shared numerous theological convictions with their sixteenth-century forerunners, including the novel ideas of the separation of church and state, the freedom of the individual conscience, and a voluntary ecclesiology which restricted the practice of baptism and church membership to professing adult Christians. Historians have likewise noted that the two movements differed from their magisterial Protestant counterparts in that each viewed its movement as a restoration of the church to first-century practices rather than as a mere reformation of the church to some previous era of perceived relative purity which remained under the auspices of government.

Effect of time on the metal-support (Fe-MgO) interaction in CVD synthesis of single-walled carbon nanotubes

A study on the effect of the metal-support interaction by employing iron particles supported on magnesium oxide (MgO) nanopowder in an alcohol-CVD process for single-walled carbon nanotubes growth is presented. Upon the prolongation of the process time, three main observations were detected: (i) decrease of the mean nanotubes diameter, (ii) reduction of the diameter distribution by the factor of two, (iii) increase of relative purity of the samples.