In satellite images the ITCZ (intertropical convergence zone) is sometimes observed to undulate and break down into a series of tropical disturbances. Tropical cyclones may later develop within these disturbances and move into higher latitudes allowing the ITCZ to reform. It has been proposed that ITCZ breakdown results from a convectively modified form of combined barotropic and baroclinic ins...

The Ni hyperaccumulator Strepthanthus polygaloides (Brassicaceae) is one of a handful of Ni hyperaccumulators known from continental North America. Surveys have revealed four distinctive morphs of this species, relying primarily on floral traits (sepal color and shape): a purple sepal morph (P), a yellow sepal morph (Y), a morph in which sepals start yellow and mature to purple (Y/P), and a mor...

Suggests Myopathy To the Editor: We read with interest the article on left ventricular noncompaction (LVNC) in children by Pignatelli et al,1 who found that LVNC has a good prognosis and that LV systolic function may undulate between deterioration and recovery.1 The report raises several concerns: Thirteen of the 36 patients (36%) were suspected of having mitochondrial myopathy (MM), although o...

2 M E D I C I N E O N T H E M I D W A Y Tracking flying snakes Ophidiophobia, the fear of snakes, traditionally has been among the most common phobias — and that was back when all we knew snakes could do was slither, burrow, swim and climb. Just imagine if snakes could fly. In fact, some can. More precisely, they glide or parachute in the same fashion as a flying squirrel, frog, lizard or fish....

A disease survey was carried out in Tamil Nadu, India during 2021 to assess the prevalence of diseases major rice-growing areas and characterise pathogens associated with infected plants. During survey, rice plants at seedling grain-filling stage showing water-soaked, elongated, light brown lesions leaf margins tips (Figure 1) were collected along grains a polythene bag, labelled sealed. Leaves...

A wave exists only in its propagating medium but Einstein erred to discard the medium for light wave and to introduce the non-existent 4-D spacetime continuum instead. It denied him the chance to address the intrinsic wave-quantum Unity of light and predict the new entity of ‘basic substance’ to compose all forms of E & m so compellingly demanded for the inter-conversions of E & m by the eqn. E...

Introduction Broncho-pulmonary diseases are the most common childhood disorder [1] . In fact, 25-31% of children's respiratory infections lead to clinical manifestations of obstructive bronchitis, and in 30-50% of cases are having prolonged, undulate or recurrent course [2, 3]. Furthermore, recurrent obstructive bronchitis in children is considered to be a manifestation of bronchial asthma [4]....

Despite the large amount of research devoted to bluff body wakes [1], very few studies have focused on stratified wakes despite their obvious applications to geophysical flows. Moreover, most of these studies have studied the turbulent regime in the wake of a sphere or an ellipsoid [2,3], due to its naval applications for submarine wakes. These bluff bodies have a finite height, which leads to ...

Soft tissues growing under constraint often form creases. We adopt the model of growth that factors the deformation gradient into a growth tensor and an elastic deformation tensor, and show that the critical conditions for the onset of creases take a remarkably simple form. The critical conditions are illustrated with tubes of tissues growing either inside a rigid shell or outside a rigid core....

The development of tropical depressions within tropical waves over the Atlantic and eastern Pacific is usually preceded by a “surface low along the wave” as if to suggest a hybrid wave-vortex structure in which flow streamlines not only undulate with the waves, but form a closed circulation in the lower troposphere surrounding the low. This structure, equatorward of the easterly jet axis, is id...