Electronic absorption spectra, infrared spectroscopy, nuclear magnetic resonance, molar conductance, and elemental analysis are some of the physicochemical methods used to characterize the 4-chloro-N'-[(E)-(2,6-dihydroxy phenyl) methylidene] benzohydrazide (HBHDH) molecule that has been synthesized. The results of the analysis show that the metal and ligand formed a 1:2 ratio. According to the spectra, the ligand HBHDH forms tridentate coordination spheres with metal ions using an ONO bond. Complexes with Fe(II), Co(II), Ni(II), Cu(II), and Mn(II) have an octahedral shape because of this. In contrast to the tetrahedral structure of the complexes created with Zn(II), Cd(II), and Hg(II), the Pd(II) complex takes on a square planar layout. According to the molar conductance values in DMF, the complexes do not undergo electrolysis. It has been determined that the metal complexes and Schiff's base HBHDH ligand have antibacterial action. The antibacterial efficiency of each combination and ligand against E. coli bacteria is higher than that of regular streptomycin.Candida albicans (MCC 1439) and Saccharomyces cerevisiae (MCC 1033) have significant antifungal effectiveness, with their growth being inhibited by over 92% in the presence of Mn(II) and Fe(II) complexes, respectively.

In this study, a novel ligand, denoted as LBr, was synthesized through the condensation reaction between 2-hydroxyaniline and 2-(5-Bromo-3,3-dimethyl-1,3-dihydro-indol-2-ylidene)-malonaldehyde. The new ligand was thoroughly characterized using 1H- and APT 13C-NMR, FTIR, and elemental analysis. The ligand was used to synthesize a series of new complexes by reacting it with cobalt, nickel, copper, and zinc chlorides. The complexes were characterized by FTIR, CHN analysis, AAS, µ-effective, and conductivity measurements besides other physical properties of both the ligand and its complexes were also determined. The results demonstrated that all complexes exhibited an octahedral geometry. The prepared complexes were utilized in hydrogen storage application to determine the significance of the central metal type in enhancing the gas storage capacity at a single pressure condition, which was 50 bar at a temperature of 77 K. The measurements demonstrated that the metal type significantly influences hydrogen storage capability. The recorded storage capacities were 2.03, 1.91, 1.86, and 1.80 wt.% for nickel, copper, zinc, and cobalt, respectively.

Stereoisograms of octahedral complexes are classified into five types (type I–type V) under the action of the correspondingRS -stereoisomeric group. Their enumeration is accomplished in a type-itemized fashion, where Fujita’s proligand method developed originally for combinatorial enumeration under point groups (S. Fujita, Theor. Chem. Acc., 113, 73–79 (2005)) is extended to meet the requirement of Fujita’s stereoisogram approach.The cycle index with chirality fittingness (CI-CF) of the point group Oh is modulated by taking account of the CI-CF for calculating type-V quadruplets contained in stereoisograms.The modulated CI-CF is combined with a CI-CF of the maximum chiral point group (O), a CI-CF of the maximumRS -permutation group, a CI-CF of the maximum ligand-reflection group, and a CI-CF of theRS -stereoisomeric group, so as to generate CI-CFs for evaluating type-I to type-V quadruplets. By introducing ligand-inventory functions into the CI-CFs, the numbers of quadruplets of octahedral complexes are obtained and shown in tabular forms.Several stereoisograms for typical complexes are depicted. Their configuration indices and C/A-descriptors are discussed on the basis of Fujita’s stereoisogram approach.

In this paper, single crystalline octahedral Co3O4 with dimensions about 100–500 nm and smooth surface has been prepared by solid-state thermal decomposition of cobalt (II) Schiff base complex Co ((3, 4-MeO-ba) 2en) Cl2 as new precursor at 450oC under air atmosphere for 3.5 h. Surface morphology of the products were characterized by Fourier transform infrared spectroscopy (FT-IR), X-ray powder diffraction (XRD) and scanning electron microscopy (SEM).

Many studies have been carried out on the effect of organic matter on soil physical, chemical, biological, and nutritional properties, including the effect of organic matter on the availability of such elements as P, N and heavy metals. There is, however, no information on the effect of organic matter on potassium uptake from micaceous minerals. The objective of this study was to investigate the effect of organic matter on potassium uptake from micaceous minerals released by alfalfa. An experiment was laid out in a completely randomized design with factorial combination and three replicates. Growth medium was a mixture of quartz sand, micaceous mineral (muscovite or phlogopite) and organic matter (0, 0.5 and 1 %). Rehnani cultivar of alfalfa was used in the experiment. During 120 days of cultivation, plants were irrigated with either complete or K-free nutrient solution and distilled water as needed. At the end of cultivation, plant shoots and roots were separately harvested and their K concentration was measured by flame photometer following dry ash extraction. Under the K-free nutrient solution, a significant increase in biomass occurred in pots containing phlogopite and organic matter as compared to those with no organic matter amendment. Also, under K-free condition, potassium concentration in shoot was above the threshold value only in phlogopite amended pots. There was no significant difference in K concentration among different levels of organic matter in control treatment as well as in muscovite added treatment. Under both nutrient solutions treatments, significant increase of K uptake occurred in pots containing phlogopite and organic matter, as compared to those without it. In contrast, under K free nutrient solution, organic matter amendment could not enhance the K uptake in pots containing dioctahedral mica (muscovite). Root activities and organic matter decomposition appear to have increased rhizosphere acidity which, in turn, facilitate the K release from trioctahedral mica (phlogopite) in K deficient medium. Thus, the effect of organic matter on K release greatly depends on the type of micaceous mineral.

A Study of Geometry in Islamic Architecture by Professor Golroo Najibaaghlou is a valuable work in the field of Islamic architecture. This book has a detailed preface, a brief introduction, and five main sections. As it is known from the introduction of the book, this book was originally written for a non-Iranian audience. The first purpose of writing this book is to try to moderate public belief about geometry and the stages of compilation and discussion in Islamic architecture. Another purpose is to correct the negative view of the geometric documentation of Islamic architecture in the West, because such a view has created a kind of reluctance to equate the works of Islamic architecture with the great works of classical Western architecture. In addition, Najibaaghlou wants to reject and respond to Western criticism that reduces Islamic architecture to the level of an unedited work. In the final chapter of the book, Najibaaghlou looks at the compiled documents of Islamic architecture from a Western perspective and highlights some of the missed points of geometric sciences, including clarifying conceptualization, recording, and transferring architectural design in the Islamic world.

The main purpose of the article, as the topic itself shows, is defining an eternal geometry(as a basic foundation and unavoidable structure)for the Islamic architecture. Therefore, as an abstract of this article, (giving a short but conclusive definition of the main subject),and in order to avoid from some possible misunderstandings in the mentioned subjects and meanings in the article, the following points seems to be useful:A. The referring meaning of the word "Geometry" (or its Arabic synonym "Hindiseh") by the author in this (article) is completely different from the common meaning of it in architecture (or the Euclidian Geometry) and its closed and limitful field of rules of some mathematical meanings and physical shapes and forms. But by the phrase "Hindiseh Jaavidan" or "Eternal Geometry" the author means the Unique, Wholistic and Comprehensive Truth, which according to the Quranic literature, is known by some Arabic terms such as "qadr", "taqdeer" and "muqaddir", "muqaddar", "qadeer", and so on. The meaning which points to the comprehensive and wholistic system of rules governing all various systems of measurement essential for the whole universe and its every individual parts's or thing's coming into existence (in their both physical being and meaningful identity).B. According to the above mentioned description, the referring meaning of the phrase "Natural Geometry" (or "Hindisi-yi Tabee 'at" or "Taqdeer") by the author in this article can be imagined as a symbolic light through which everything in the universe become visible, readable and understandable for every other thing in the whole cosmos of varieties and multiplicities (in both qualitative and quantitative groups of limits and measures). The limits and measures without which everything's essential mutual relation and harmonic suitable cooperative sharing life with every other thing in the world seems to become impossible.C. Then, in a similar symbolic structure, the other important meaning of "Geometry" or "Hindisih" to which the author is going to point to is "The Essential Geometry" or "Hindisik-yt Dhaatee". According to the Holy Quran, for every possible matter of being in the physical world, there is a limitless, unchangeable, eternal specific and determined Truth in The Presence of God which, as same as all other Truthful Meanings in such a Sacred Presence is free from all limits essential for the material world such as: matter, physical shape and form, length, width, thickness, color and other similar limits.D. And at last, the author's purposed meaning of the subject of "Islamic Architecture" in this article, is an orderly and unitary structure which in its both whole and parts, and in its both physical structure and meaningful identity obey the One Divine System of Rules named Islam. And, at last, by the word of "Islam" means the universal governing order of both physical and spiritual worlds.

Mineral weathering is a major source of most essential nutrients including potassium. It is well known that potassium plays an important role in improving the quality of agricultural products and micaceous minerals, as the major source of potassium, are abundant in Iranian soils. No information is available on the role of micaceous minerals in supplying K to barley as the second major crop in Iran. The objective of this research was to demonstrate the ability of barley (Hordeum vulgare L.) to take up structural potassium from muscovite and phlogopite. The experiment was carried out in a completely randomized design with factorial combinations and three replicates. Culture medium was a mixture of quartz sand (as filling material) and K-bearing minerals including muscovite or phlogopite. Pots were irrigated with different nutrient solutions (+K and -K) during a period of four months. Barley Govhar cultivar was used which is widely cultivated in the Isfahan province. At the end of experiment, shoots and roots were separated and plant samples were prepared with dry ashing method and their K content was determined with flame photometer. In K-free treatments, total plant K uptake was significantly higher in phlogopite treated medium as compared to muscovite. No significant difference was found between control and muscovite amended treatment under K-free solution. In pots amended with phlogopite, K concentration was in sufficient limit, even under K-free nutrient solution. This indicates the importance of the type of micaceous minerals in plant K availability, particularly in soils where minerals structural K is the only source of K supply.

Conformers of [M (ABC)6] complex have been enumerated on the basis of computational group theory, where M is the central metal, and ABC is the ligand, bound to M through A. Based on the 16 conformers of the M (AB)6 core unit, 7173 conformers have been found for the [M (ABC)6] complex, which are assigned to nine point groups, 1 D3d, 4 D3, 4 S6, 5 C2h, 7 C3, 182 C2, 15 Cs, 23 Ci, and 6932 C1.