Nanoleite: a new semiconducting carbon allotrope predicted by density functional theory

In this report, a new carbon allotrope named nanoleite is proposed. Its crystal structure is constructed by embedding carbon nanotubes into the matrix of lonsdaleite periodically, leading to a hexagonal primitive unit cell. The equilibrium structure of nanoleite is fully relaxed by density functional theory calculation, and we demonstrate that nanoleite is a semiconductor with an indirect energy bandgap of 2.06 eV. Furthermore, it has a high absorption coefficient in the visible spectrum range, which is comparable to that of the gallium arsenide and indium phosphide. X-ray diffraction patterns and phonon modes are also studied.

A new carbon allotrope with an indirect bandgap of 2.06 eV has been predicted by density functional theory, which has a high absorption coefficient in the visible spectral range that is suitable for solar cell application.     

Establishment of cross-cradle hold technique combined with intensive breastfeeding counselling positively impacts the weight gain rate in early infancy

A quasiexperimental field study was undertaken in 576 exclusively breastfed (EBF) infants from 0 to 14 weeks in Gujarat, India to assess the effect of the use of appropriate breastfeeding techniques on daily weight gain rate and on reducing the underweight rate in early infancy. The interventions were delivered through the existing health system and focused primarily on counselling pregnant women during antenatal and post-natal sessions for ensuring ‘effective breastfeeding’ by adoption of the technique of ‘cross cradle hold’, appropriate breast attachment, emptying of one breast before shifting to the other along with conducting regular monitoring of infant's weight. The intervention care group (ICG) of 300 EBF infants were compared with 276 EBF infants in the control standard care group (SCG). The findings revealed that median weight gain per day between 0 and 14 weeks was significantly higher (p = 0.000) in ICG (32.7 g) as compared with SCG (28.05 g). The median weight-for-age Z at 14 weeks of age was also significantly higher in ICG compared with SCG (p = 0.000). Underweight prevalence was three times lower in ICG (5.3%) compared with SCG (16.7%) at 14 weeks of age. Infants in the ICG were noted to be 2.65-fold more likely to achieve a weight gain of 30 g or more per day compared with infants in SCG. Nutrition interventions, therefore, must aim not only on mere promotion of EBF for up to 6 months but stress on ensuring EBF is ‘effective’ for optimum transfer of breastmilk through adoption of appropriate techniques, including cross-cradle hold, by mothers.