Self-replicating system

T Tjivikua, P Ballester, J Rebek Jr - Journal of the American …, 1990 - ACS Publications
The ability of nucleic acids to act as templates for self-replication has been unique. In living
systems, single strands act as templates during phosphate transfer reactions. In …

Kinetic studies and modeling of a self-replicating system

JS Nowick, Q Feng, T Tjivikua, P Ballester… - Journal of the …, 1991 - ACS Publications
The design, synthesis, and study of a molecular template, 1 la, that catalyzes its own
formation from simpler components, 9 and lOd, is described. Autocatalysis is shown by the …

Convergent functional groups. X. Molecular recognition of neutral substrates

KS Jeong, T Tjivikua, A Muehldorf… - Journal of the …, 1991 - ACS Publications
In this paper synthetic molecular clefts with functional groups complementary toadenines,
diketopiperazines, and barbiturates are described. Lactams and imides are compared for …

Recognition and transport of adenine derivatives with synthetic receptors

T Benzing, T Tjivikua, J Wolfe, J Rebek Jr - Science, 1988 - science.org
Several new synthetic agents show high affinity for binding adenine derivatives. The
structures feature complementary hydrogen bonds that cause the molecular chelation of the …

Convergent functional groups. VIII. Flexible model receptors for adenine derivatives

T Tjivikua, G Deslongchamps… - Journal of the American …, 1990 - ACS Publications
Conclusion. As discussed in the preceding paper, there are regions of sequence similarity
among CEase, 21 BuChE, 22 and AChE. 23 This structural similarity apparently has …

Relative hydrogen bonding affinities of imides and lactams

KS Jeong, T Tjivikua, J Rebek Jr - Journal of the American …, 1990 - ACS Publications
(5) Molecular modeling indicated that cyclic hydrogen-bond arrays were geometrically
feasible for all of the molecules; the C4 spacers, however, ex-perienced eclipsing in such …

Uranium mining in Namibia: Occupational health and safety issues

WA Lindeke, T Tjivikua - New Solutions: A Journal of …, 1996 - journals.sagepub.com
IN THIS PAPER, WE SHALL EXAMINE THE developmental impact of occupational health
and safety in Namibia's mining industry. Specifically, we wish to investigate the accusations …

[PDF][PDF] THE CONCEPT OF PROGRESS IN DIFFERENT CULTURES–

T Tjivikua - Citeseer
The main title beckons a number of questions, for instance: What is “progress”? What is
culture? And eventually, How does culture relate to “progress”? The terms “progress” and …

[PDF][PDF] The concept of progress in different cultures-culture and progress in Namibia: Contradiction or concurrence?

T Tjivikua - 2010 - ir.nust.na
The main title beckons a number of questions, for instance: What is “progress”? What is
culture? And eventually, How does culture relate to “progress”? The terms “progress” and …

[PDF][PDF] Welcome remarks by Prof. Tjama Tjivikua, Vice Chancellor, NUST, on the occasion of the signing of the Memorandum of Understanding between the NUST and …

T Tjivikua - 2014 - ir.nust.na
It is a great pleasure to see all of you here today gathered for the occasion of the signing
ceremony of the Memorandum of Understanding (MoU) between the Namibia Students …