BACKGROUND The ratio of 2nd to 4th digit length (2D:4D) is sexually dimorphic (mean 2D:4D is lower in males than females) and is thought to be fixed early in development. 2D:4D has been reported to be related to fetal growth, hand preference, autism, Asperger's syndrome, sperm counts, family size, age at myocardial infarction in men and breast cancer in women. There is indirect evidence that 2D...

The synthesis and analytical applications of the new heterocyclic ligand are described. The complexation reaction of the ligand with some cations was studied in aqueous methanol at room temperature using the spectrophotometric method. Results revealed that only the absorption spectra of the Fe (III)–ligand complex show a high redshift of the absorption maximum in the aqueous methanol soluti...

We present results from analysis of spectra from a sample of ∼ 900 quasars from the Sloan Digital Sky Survey. These objects were selected for their intermediate redshift (1.2 < z < 1.8), placing Mg II and UV Fe II in the optical band pass, relatively narrow Mg II lines, and moderately good signal-to-noiseratio spectra. Using a maximum likelihood analysis, we discovered that there is a significa...

Citation Wulferding, Dirk et al. " Interplay of thermal and quantum spin fluctuations in the kagome lattice compound herbertsmithite. Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use. The MIT Faculty has made this article openly available. Please share how this access benefits you. Y...

Received ; accepted – 2 – ABSTRACT We present the results of reanalysis of low redshift Mg II absorption line sample compiled by Steidel and Sargent. We constructed grids of photoionization models for various cloud parameters. The conditions on cloud parameters to produce N(Fe II)≥N(Mg II) are obtained using single cloud curve of growth. Properties of Mg II absorbers with W(Fe II)/W(Mg II)(defi...

achillea tenuifolia lam. (asteraceae) afforded a dichloromethane fraction from which three known compounds β-sitosterol (compound1), 5-hydroxy, 4&apos;,6,7– trimethoxy flavone (salvigenin compound 2), and methyl-gallate (compound 3) were isolated for the first time. the structure of isolated compounds was elucidated by different spectroscopic methods. applying the molar-ratio method, the comple...

complexation reactions between methylthymol blue and fe , a l ,ga , 1n a nd ti ions have been studied in buffer aqueous solutions of ph 5.0 at 2s°c by a spectrophotometric technique. the conditional stepwise stability constants of the resulting 1:l and 1:2 (metal-to-ligand) complexes were determined from the absorbance-mole ratio data at three different wavelengths of the visible spectra. the o...

In this study Fe (III)-doped TiO2 nanoparticles were synthesized by sol-gel method at two atomic ratio of Fe/Ti, 0.006 and 0.034 percent. Then the photoactivity of them was investigated on degradation of phenol under UV (<380 nm) irradiation and visible light (>380 nm). Results showed that at appropriate atomic ratio of Fe to Ti (% 0.034) photoactivity of Fe(III)-doped TiO2 nanoparticles increa...

The aim of this study was to investigate the phytotoxicity of thin-walled carbon nanotubes (CNTs) to rice (Oryza sativa L.) seedlings. Three different CNTs, including hollow multi-walled carbon nanotubes (MWCNTs), Fe-filled carbon nanotubes (Fe-CNTs), and Fe-Co-filled carbon nanotubes (FeCo-CNTs), were evaluated. The CNTs significantly inhibited rice growth by decreasing the concentrations of e...