BACKGROUND AND AIMS When examining the growth patterns of rice crops for a 5-year period, it was found that the time course of accumulation of above-ground dry matter did not follow a simple sigmoid curve as expected for a monocarpic plant. Instead, there was a decrease in growth around flowering, followed by an increase and then a final decrease of growth at crop maturity. There are two nearly...

Akebia trifoliata, commonly named augmelon (means August plus melon), has been domesticating as a new artificial cultivation fruit crop in China for several years. Generally, field management measurements are severely dependent on the development dynamic of harvest organs, and therefore study stage A. trifoliata is urgent production. In this study, four cloned lines with various spindle, nephro...

The Species-Area Relationship (SAR) has been widely employed to assess species diversity and predict species extinction. Thus far, although many functions were proposed to fit SAR based on field observations or simulation results, the shape of SAR curve has been debated extensively over decades. Here we uncover a potential global-local inconsistency in SARs fitting simulation blocked by the lim...

Type L pyruvate kinase from mouse liver has been studied. The enzyme is strongly inhibited by low concentrations of copper ions, and the inhibition is reversed by fructose 1,6diphosphate. In the absence of inhibitor, fructose 1,6diphosphate also increases the pyruvate kinase activity at pH values higher than 7. Furthermore, the Cu++ inhibition is pH and K+ concentration dependent. Plots of reac...

( I ~ I ) , PLUNKETT (1926), STANLEY (1932), and HARNLY (1932, 1936). Some of these workers have attempted to explain the mechanism of the temperature effect by the form of the curves obtained when the values of the measured character are plotted against the time of transfer. It is significant that the form of these curves, in all cases, appears to be sigmoid, resembling to some extent the prob...

Fixed bed adsorption of toxic metal ions such as chromium is a research area current interest. Mathematical models are routinely used to summarize breakthrough results ions, which often display varying degrees curve asymmetry. This work introduces the Weibull function simple model for correlating asymmetric curves chromium. The similar widely Bohart-Adams in several aspects. For example, they b...

The rotated-sigmoid form is a characteristic of old-growth, uneven-aged forest stands caused by past disturbances such as cutting, fire, disease, and insect attacks. The diameter frequency distribution of the rotated-sigmoid form is bimodal with the second rounded peak in the midsized classes, rather than a smooth, steeply descending, monotonic curve. In this study a finite mixture of two Weibu...

    Idiopathic colon perforation is rare in children. It is more common at the extremes of age. Splenic flextures, ileocecal and lower sigmoid regions are the most common sites of perforation. Delay in proper management of this condition is associated with high mortality and morbidity rate. We report on the case of a 2.5 years old girl who presented with fever, diarrhea, nausea and vomiting and...

Fistula formation between bowel and total hip arthroplasty or revision arthroplasty hardware is rare. We present a case of a 78-year-old woman with protrusio of left hip arthroplasty and acetabular reconstruction hardware that caused direct perforation of the sigmoid colon and fistula formation between the sigmoid colon and the left hip joint. The patient underwent several joint debridements, s...