Proximodistal leg regeneration in Carausius morosus: growth, intercalation and proximalization

Development ◽  
1988 ◽  
Vol 102 (1) ◽  
pp. 71-84
Author(s):  
A. Bart
Keyword(s):  
Growth Rates ◽  
Distal Part ◽  
Healing Process ◽  
Differential Growth ◽  
Carausius Morosus ◽  
Positional Value ◽  
Different Levels

The proximodistal epidermal organization of the regenerated insect leg has been studied by grafting between corresponding and noncorresponding levels of the pro- and metathoracic femur and tibia. The results have been studied quantitatively (growth rates of the associated parts and of unsegmented intercalary structures) and qualitatively (nature, length, polarity of intercalary structures). In grafts between equivalent levels, no intercalary structure is formed, but a differential growth has been observed, the distal one fifth of segments growing about 1.5 to 2 times more than the proximal one. In grafts between different levels, unsegmented intercalary structures are formed from the distal part which thereby acquires proximal characteristics (proximalization). However, distal tibial cells do not form femur in this process under an hypothetical femoral influence: there is no ‘dominance’ of femur over tibia. Some segmented intercalary structures have also been observed, but their formation cannot be related clearly to differences in the healing process. To explain proximalization, an hypothesis is presented suggesting that distal cells, which grow faster, would be the first to enter a period when positional value becomes labile and would then adapt to the proximal cells' value.

scholarly journals The Growth and Composition of Wool III. Variations in the Sulphur Content of Wool

1965 ◽  
Vol 18 (3) ◽  
pp. 671 ◽  
Author(s):  
PJ Reis
Keyword(s):  
Growth Rates ◽  
Dry Weight ◽  
Sulphur Content ◽  
Wool Growth ◽  
Different Levels

The sulphur content of wool was measured during experiments in which the nutritive status of sheep was altered by changes in the amount or composition of the diet. Three experiments were carried out, involving 13 sheep and five diets given at different levels of feeding. Wool grown on delineated areas was collected and its clean dry weight and sulphur content were determined. Wool growth rates varied between 0�3 and 1� 8 mg clean dry wool/cm2/day.

Abstract 4799: Variation in mutational landscape among small colonic polyps with differential growth rates

2015 ◽  
Author(s):  
Chelsie K. Sievers ◽  
Perry J. Pickhardt ◽  
Kristina Matkowskyj ◽  
Dawn Albrecht ◽  
Luli Zou ◽  
...  
Keyword(s):  
Growth Rates ◽  
Colonic Polyps ◽  
Differential Growth ◽  
Mutational Landscape

An analysis of growth of different cattle genotypes reared in different environments

1984 ◽  
Vol 103 (1) ◽  
pp. 137-153 ◽  
Author(s):  
J. E. Frisch ◽  
T. E. Vercoe
Keyword(s):  
Growth Rate ◽  
Growth Rates ◽  
High Growth ◽  
Environmental Stresses ◽  
Growth Potential ◽  
Gastrointestinal Helminths ◽  
Treatment Groups ◽  
Survival And Growth ◽  
Different Levels ◽  
High Growth Potential

SummaryCalves from three breeds, Brahman, Hereford × Shorthorn (HS) and Brahman × HS (BX), were divided equally into two groups, one of which was treated every 3 weeks from birth onwards to control ticks and gastrointestinal helminths, and one of which was untreated. Mortalities, growth rates and levels of resistance to environmental stresses that affected both mortality and growth under grazing conditions were recorded for all animals up to weaning (6 months) and for all males up to 15 months of age. The Brahmans were the most and the HS were the least resistant to environmental stresses, each of which was shown to depress growth in proportion to its magnitude and to contribute to the high mortalities of the HS. All breeds responded positively to parasite control with the greatest response in both survival and growth in the HS breed and the least response in the Brahman breed.Samples of males from the various breed-treatment groups were taken into pens where they were protected from environmental stresses and fed both low-quality pasture hay and high-quality lucerne hay ad libitum. Measurements were made of fasting metabolism, maintenance requirement, voluntary food intake and gain, variables related to the growth potential of each animal. The HS animals had the highest whilst the Brahmans had the lowest values for each variable.However, despite their low growth potential, the Brahmans had the highest growtli rate, and the HS, despite their high growth potential, had the lowest growth rate, when growth was measured in the presence of all environmental stresses. When parasites were controlled, growth rates were highest for the BX, the breed with intermediate growtli potential, and did not differ between the HS and Brahmans. These interactions arose because of the different contributions of resistance to environmental stresses and growth potential to growth rate measured at the different levels of environmental stresses. The relevance of these interactions to breed evaluation and cross-breeding is considered.Growth potential and resistance to environmental stresses were negatively correlated both between and within breeds, though the latter was biased by the effects of compensation. The influence of these relationships on the likely outcome of selection for increased growth rate, both between and within breeds, is discussed.

Differential growth rates in stromal cultures of human prostate derived from patients of varying ages

The Prostate ◽  
1999 ◽  
Vol 38 (2) ◽  
pp. 110-117 ◽  
Author(s):  
Julia A. Sensibar ◽  
Shaina J. Pruden ◽  
Richard Z. Kasjanski ◽  
Alfred Rademaker ◽  
Chung Lee ◽  
...  
Keyword(s):  
Growth Rates ◽  
Human Prostate ◽  
Differential Growth

scholarly journals Russeting and Relative Growth Rate Are Positively Related in ‘Conference’ and ‘Condo’ Pear

HortScience ◽  
2014 ◽  
Vol 49 (6) ◽  
pp. 746-749 ◽  
Author(s):  
Johannes Daniel Scharwies ◽  
Eckhard Grimm ◽  
Moritz Knoche
Keyword(s):  
Surface Area ◽  
Early Development ◽  
Growth Rates ◽  
Neck Region ◽  
Prolate Spheroid ◽  
Pear Fruit ◽  
Differential Growth ◽  
Relative Growth ◽  
Relative Growth Rates ◽  
Growth Stresses

Russeting is an important surface disorder in fruit and mechanical growth stresses, among other factors, are considered causal in russet induction. To test this hypothesis, fruit development and russeting were monitored on a whole fruit level and also in the calyx, cheek, and neck region of developing ‘Conference’ and ‘Condo’ pear fruit (Pyrus communis L.). To quantify growth, the pear fruit was geometrically modeled as approximating to half of a prolate spheroid for the calyx region and two truncated cones for the cheek and neck regions, respectively. Mass and surface area of ‘Conference’ and ‘Condo’ fruit increased in a single sigmoidal pattern with time. Fruit volume, determined by buoyancy, using a hydrostatic balance, and the Archimedes’ principle was closely related to that predicted by the model from fruit geometry. Growth rates of surface area in ‘Conference’ and ‘Condo’ peaked at ≈90 and 100 days after full bloom (DAFB), respectively, and were highest in the calyx followed by the cheek and neck regions. Relative growth rates, calculated by dividing growth rates by the absolute surface area present at that time, were at maximum during early development and thereafter continuously declined. In general, relative growth rates were highest for the cheek region, intermediate in the calyx, and lowest for the neck. ‘Conference’ fruit were always more russeted than ‘Condo’ with russeting generally decreasing from calyx to cheek and neck. Furthermore, russeting increased rapidly in ‘Conference’ during early development until ≈70 DAFB, particularly in the calyx and cheek regions and, to a lesser extent, in the neck region. There was little change in russeting after ≈70 DAFB. Plotting rates of russeting vs. relative growth rates in surface area indicate a positive and common relationship across regions where russeting increased when relative growth rates exceeded 0.03/day. Thus, differential growth rates between regions within ‘Conference’ or ‘Condo’, but not across the two cultivars, accounted for topical differences in russeting.

scholarly journals Planar Differential Growth Rates Initiate Precise Fold Positions in Complex Epithelia

2019 ◽  
Vol 51 (3) ◽  
pp. 299-312.e4 ◽  
Author(s):  
Melda Tozluoǧlu ◽  
Maria Duda ◽  
Natalie J. Kirkland ◽  
Ricardo Barrientos ◽  
Jemima J. Burden ◽  
...  
Keyword(s):  
Growth Rates ◽  
Differential Growth

Benefits of sucrose octasulfate (TLC-NOSF) dressings in the treatment of chronic wounds: a systematic review

2021 ◽  
Vol 30 (Sup4) ◽  
pp. S42-S52
Author(s):  
Harikrishna Nair ◽  
N Venkateshwaran ◽  
Selva Seetharaman S ◽  
Wuquan Deng ◽  
Apinan Uthaipaisanwong ◽  
...  
Keyword(s):  
Systematic Review ◽  
Chronic Wounds ◽  
Healing Process ◽  
Economic Benefits ◽  
Google Scholar ◽  
Wound Management ◽  
Cochrane Library ◽  
Evidence Based ◽  
Sucrose Octasulfate ◽  
Different Levels

Objective: Management of chronic wounds remains one of the major challenges for health professionals and patients. An evidence-based decision is important to ensure that patients are receiving the best treatment proven to reduce healing time and improve outcomes, including economic benefits and patients' health-related quality of life (HRQoL). Due to recent restrictions because of the COVID-19 pandemic, including closure of wound care centres within hospitals and a drop in patient volume, chronic wound management needs simple-to-use dressings which are still effective and evidence-based solutions. This systematic review was conducted to identify the clinical evidence available on a sucrose octasulfate dressing (TLC-NOSF, UrgoStart dressing range, Laboratoires Urgo, France) to explore its efficacy in the management of chronic wounds, particularly lower limb ulcers, diabetic foot ulcers and pressure ulcers. Method: A literature search of PubMed, Cochrane Library and Google Scholar was conducted based on the PICO model (patient/population, intervention, comparison and outcomes) to retrieve publications of different levels of evidence in order to evaluate outcomes of the use of TLC-NOSF dressings. Results: A total of 21 publications of different levels, ranging from double-blind randomised control trials to case reports, involving over 12,000 patients, were identified through PubMed, with a further eight publications through Google Scholar and two publications through Cochrane Library. A total of seven results were omitted due to the lack of relevance or repetition. Conclusion: All the evidence provided suggest that these dressings provide clinicians with an evidence-based option for the management of chronic wounds; that the TLC-NOSF dressings are beneficial in promoting the healing process, reducing healing times, enhancing patients' HRQoL, and in allowing a more cost-effective procedure.

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