Willem J Hillenius

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it remains unclear how to scale up these novel devices because of the lack of strategies in scaling up nanotube growth and large-scale nanotube assembly and patterning (1, 30). Using the synthesized self-oriented nanotube arrays without further sample processing , we have studied their properties as electron field emission arrays. About 15 samples have been(More)
Longisquama insignis was an unusual archosaur from the Late Triassic of central Asia. Along its dorsal axis Longisquama bore a series of paired integumentary appendages that resembled avian feathers in many details, especially in the anatomy of the basal region. The latter is sufficiently similar to the calamus of modern feathers that each probably(More)
Modern birds have markedly foreshortened tails and their body mass is centred anteriorly, near the wings. To provide stability during powered flight, the avian centre of mass is far from the pelvis, which poses potential balance problems for cursorial birds. To compensate, avians adapted to running maintain the femur subhorizontally, with its distal end(More)
Rabbits have been proposed as a model organism for the human lacrimal apparatus (LA), including the nasolacrimal duct (NLD), based principally on comparative studies of adult morphology; however, little is known about its development. The NLD first appears as an incomplete primordium in the subcutaneous region of the primordial eyelid and subsequently(More)
a suction pump to draw air past the mouths of the ventrobronchi into the mesobronchus (1). A glass model demonstrated how this geometry gives rise to unidirectional airflow (1). The mechanism of unidirectional flow in alligator lungs is yet to be determined, but our data support Hazelhoff 's model (1), in which key features of the bronchial tree give rise(More)
The function of the septomaxilla of nonmammalian synapsids has long been problematic. Distinctive features of this bone, including a prominent intranarial process and a septomaxillary canal and foramen, are characteristic of pelycosaurs and nonmammalian therapsids, but are lost in their mammalian descendants. Numerous contradictory reconstructions have been(More)
The nasolacrimal apparatus (NLA) is a multicomponent functional system comprised of multiple orbital glands (up to four larger multicellular exocrine structures), a nasal chemosensory structure (vomeronasal organ: VNO), and a connecting duct (nasolacrimal duct: NLD). Although this system has been described in all tetrapod vertebrate lineages, albeit not(More)
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