Bei Betrachtung der geometrischen und elektronischen Struktur des Tris(pentafluorethyl)silanids erscheint das Anion auf den ersten Blick als Lewis-Base. Quantenmechanischen Rechnungen zufolge liegen die HOMO- LUMO-Energien von Perfluoralkylsilaniden deutlich niedriger nicht fluorierter Derivate. Dies hat eine geringere Lewis-Basizität zugleich erhöhte Lewis-Acidität [Si(C2F5)3]−-Ions zur Folge....

Employing the Lanczos algorithm in combination with a kernel polynomial moment expansion (KPM) and the maximum entropy method (MEM), we show a way of calculating charge and spin excitations in the Holstein t–J model, including the full quantum nature of phonons. To analyze polaron band formation we evaluate the hole spectral function for a wide range of electron–phonon coupling strengths. For t...

We derive the Holstein-Primakoff oscillator realization on the coadjoint orbits of the SU(N + 1) and SU(1, N) group by treating the coadjoint orbits as a constrained system and performing the symplectic reduction. By using the action-angle variables transformations, we transform the original variables into Darboux variables. The Holstein-Primakoff expressions emerge after quantization in a cano...

Eighteen Postpartum Holstein Friesian (HF) crossbred cows aged between 2nd and 5th lactations were selected and randomly divided into 2 experimental groups viz., group I and II (control). On day 2 Postpartum group I and II cows were treated with an intramuscular injection of 5 mg methyl ergometrine maleate and 5 ml normal saline, respectively. The cervical involution progressed rapidly and on d...

Sialyl 6-sulfo Lewis X determinant has been described recently as a major ligand for L-selectin on high endothelial venules of human peripheral lymph nodes. From our investigation of its distribution in human colorectal cancer tissues and cultured colon cancer cells, the sialyl 6-sulfo Lewis X determinant was preferentially expressed in the nonmalignant colonic epithelia rather than cancer cell...

This study was conducted at Sarsha Upazila in Jessore district of Bangladesh to capture a scenario of productive and reproductive performances of different genotypes such as Holstein-Friesian cross, Sahiwal cross, Sindhi cross with local, and indigenous dairy cows. Data were collected by live survey on 100 cows, divided into 4 groups each consists of 25 animals. Results shows that age at first ...

We propose the implementation of the Holstein model by means of digital methods in a linear chain of trapped ions. We show how the simulation fidelity scales with the generation of phononic excitations. We propose a decomposition and a stepwise trapped-ion implementation of the Holstein Hamiltonian. Via numerical simulations, we study how the protocol is affected by realistic gates. Finally, we...

carpal fracture-dislocation is regarded as an unusual orthopedic injury and, thus, orthopedic surgeons are less experienced in dealing with and treating these fractures and dislocations. we report a 20-year-old worker man suffering from an unusual carpal fracture-dislocation. there was trans-scaphoid fracture and lunate dislocation with other carpal proximal bones toward volar of the wrist. two...

What sorts of properties should we use in building our conception of the way the world is? David Lewis offers one answer to this question; Robert Stalnaker offers another. Lewis suggests a reductionist picture, according to which we should strive to build our conception of the way the world is on the basis of fundamental (or ‘perfectly natural’) properties. Fundamental properties, according to ...