Authors:V. Meenatchi, K. Muthu, M. Rajasekar, S. P. Meenakshisundaram, and S. C. Mojumdar
Single crystals of o-hydroxybenzoic acid (o-HBA, salicylic acid) have been grown by slow evaporation solution growth technique. It crystallizes in monoclinic system with two molecular units in the cell (centrosymmetric space group P21/c). The lattice parameters are a = 4.8967(6) Å, b = 11.2204(14) Å, c = 11.3027(15) Å and β = 92.096(12)°. The modes of vibrations of different functional groups present were identified by FT-IR studies. Differential scanning calorimetry (DSC) study reveals the purity of the sample and no decomposition is observed up to the melting point. The crystals are further characterized using UV–Vis and powder XRD. Effect of solvents on the growth and morphology has been investigated. The crystalline cohesion is achieved by intra and intermolecular hydrogen bonds.
Human beings live in a complex and magical system of nature. The constitution of everything is like the structure science of architecture, which presents various forms and combinations. The development of structure science makes modern architecture show the high unity of internal structure and external contour. Through the study of branch networks formed by rivers, the mystery of branch growth can be found, for instance fractal self-similarity, preferential growth at the tops, avoidance of homogeneity, etc. Based on the understanding of branch ecosystem, everyone can try to build a sustainable surface structure by mimicking the laws of river network.
It is demonstrated that all stable (non-radioactive) isotopes are formally interrelated as the products of systematically adding alpha particles to four elementary units. The region of stability against radioactive decay is shown to obey a general trend based on number theory and contains the periodic law of the elements as a special case. This general law restricts the number of what may be considered as natural elements to 100 and is based on a proton:neutron ratio that matches the golden ratio, characteristic of biological and crystal growth structures. Different forms of the periodic table inferred at other proton:neutron ratios indicate that the electronic configuration of atoms is variable and may be a function of environmental pressure. Cosmic consequences of this postulate are examined.
Authors:Roderik Fiala, Vladimír Repka, Milada Čiamporová, Michal Martinka, and Ján Pavlovkin
L’Huillier , L. , ďAuzac , J. , Durand , M. , Michaud-Ferié , N. ( 1996 ) Nickel effects on two maize (Zea mays) cultivars: growth, structure, Ni concentration, and localization . Can. J. Bot. 74 , 1457 – 1554
, G , Amabilino , DB The nanoscale aspects of chirality in crystal growth: structure and heterogeneous equilibria 2009 DB Amabilino eds. Chirality at the nanoscale Wiley VCH Darmstadt 305 – 341 10.1002/9783527625345.ch10
%) and the additional inclusion of “old” and “recurring” journals (17 %).
All in all, the growth in the number of articles in a specific field should not be directly interpreted as an increase in scientific activities. Instead, the specific growth