Effects of age, plant spacing, and other variables on growth, yield, and fiber quality of kenaf, Hibiscus cannabinus L.

Bibliography: p. 19.

The influence of type and of age upon the utilization of feed by cattle /

"October 7, 1911."

The coming of Parliament; England from 1350 to 1660.

Mode of access: Internet.

An exposition of the prophecies : supposed by William Miller to predict the second coming of Christ, in 1843. With a supplementary chapter upon the true scriptural doctrine of a millennium prior to the judgment /

Mode of access: Internet.

New Testament millennarianism: or, The kingdom and coming of Christ as taught by Himself and His apostles; set forth in eight sermons preached before the University of Oxford, in the 1854: at the lecture founded by the late Rev. John Bampton ...

Mode of access: Internet.

The ecclesiastical history of the English nation : from the coming of Julius Caesar ... till the year of our Lord 731 /

Mode of access: Internet.

Biblia innocentium, being the story of God's chosen people before the coming of Our Lord Jesus Christ upon earth,

Mode of access: Internet.

The second advent, or, coming of the Messiah in glory, shown to be a scripture doctrine and taught by divine revelation from the beginning of the world /

Mode of access: Internet.

Rehabilitation of the disabled : 45 years of age and over, fiscal years 1949 and 1948.

Mode of access: Internet.

Correlating gene expression with larval competence and the effect of age and parentage on metamorphosis in the tropical abalone Haliotis asinina

The non-geniculate crustose coralline alga (CCA) Mastophora pacifica can induce the metamorphosis of competent Haliotis asinina (Vetigastropoda) larvae. The ability to respond to this natural cue varies considerably with larval age, with a higher proportion of older larvae (e.g. 90 h) able to metamorphose in response to M. pacifica than younger larvae (e.g. 66 h). Here we document the variation in time to acquisition of competence within a larval age class. For example, after 18 h of exposure to M. pacifica, approximately 15 and 36% of 84 and 90-h-old H. asinina larvae had initiated metamorphosis, respectively. This age-dependent response to M. pacifica is also observed when different aged larvae are exposed to CCA for varying periods. A higher proportion of older larvae require shorter periods of exposure to CCA than younger larvae in order to initiate metamorphosis. In this experiment, as in the previous, a small proportion of young larvae were able to respond to brief periods of CCA exposure, suggesting that they had developed the same state of competency as the majority of their older counterparts. Comparisons of the proportions of larvae undergoing metamorphosis between families reveals that parentage also has a significant (P < 0.05) affect on whether an individual will initiate metamorphosis at a given age. These familial differences are more pronounced when younger, largely pre-competent larvae (i.e. 66 h old) are exposed to M. pacifica, with proportions of larvae undergoing metamorphosis differing by as much as 10 fold between families. As these data suggest that variation in the rate of development of the competent state has a genetic basis, and as a first step towards identifying the molecular basis to this variation, we have identified numerous genes that are differentially expressed later in larval development using a differential display approach. Spatial expression analysis of these genes suggests that they may be directly involved in the acquisition of competence, or may play a functional role in the postlarva following metamorphosis.

Modelling cell lifespan and proliferation: is likelihood to die or to divide independent of age?

In cell lifespan studies the exponential nature of cell survival curves is often interpreted as showing the rate of death is independent of the age of the cells within the population. Here we present an alternative model where cells that die are replaced and the age and lifespan of the population pool is monitored until a, steady state is reached. In our model newly generated individual cells are given a determined lifespan drawn from a number of known distributions including the lognormal, which is frequently found in nature. For lognormal lifespans the analytic steady-state survival curve obtained can be well-fit by a single or double exponential, depending on the mean and standard deviation. Thus, experimental evidence for exponential lifespans of one and/or two populations cannot be taken as definitive evidence for time and age independence of cell survival. A related model for a dividing population in steady state is also developed. We propose that the common adoption of age-independent, constant rates of change in biological modelling may be responsible for significant errors, both of interpretation and of mathematical deduction. We suggest that additional mathematical and experimental methods must be used to resolve the relationship between time and behavioural changes by cells that are predominantly unsynchronized.