“Diminishing returns” for leaves of five age‐groups of Phyllostachys edulis culms

Spearman's Law of Diminishing Returns (SLODR) with regard to age was tested in two different databases from the National Longitudinal Survey of Youth. The first database consisted of 6,980 boys and girls aged 12–16 from the 1997 cohort ( NLSY 1997 ). The subjects were tested with a computer-administered adaptive format (CAT) of the Armed Services Vocational Aptitude Battery (ASVAB) consisting of 12 subtests. The second database consisted of 11,448 male and female subjects aged 15–24 from the 1979 cohort ( NLSY 1979 ). These subjects were tested with the older 10-subtest version of the ASVAB. The hypothesis was tested by dividing the sample into Young and Old age groups while keeping IQ fairly constant by a method similar to the one developed and employed by Deary et al. (1996) . The different age groups were subsequently factor-analyzed separately. The eigenvalue of the first principal component (PC1) and the first principal axis factor (PAF1), and the average intercorrelation of the subtests were used as estimates of the g saturation and compared across groups. There were no significant differences in the g saturation across age groups for any of the two samples, thereby pointing to no support for this aspect of Spearman's “Law of Diminishing Returns.”

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Phyllostachys edulis (moso bamboo) ages significantly affect soil nitrogen transformation and endophytic microbes but niche differentiations outweigh ages in shaping microbial communities of moso bamboo-soil system

10.21203/rs.3.rs-29644/v1 ◽

2020 ◽

Author(s):

MANYUN ZHANG ◽

Weijin Wang ◽

Shahla Hosseini Bai ◽

Zhihong Xu ◽

Zhe Yun ◽

...

Keyword(s):

Microbial Communities ◽

Management Practices ◽

Nutrient Management ◽

Age Groups ◽

Forest Products ◽

Moso Bamboo ◽

Rhizospheric Soil ◽

Community Structures ◽

Phyllostachys Edulis ◽

Soil System

Abstract Background: Phyllostachys edulis (moso bamboo) is a key source of non-wood forest products. Clarifying the linkage among bamboo growth, soil nutrient and core microbe can expand the horizon on nutrient management practices and functional endophytic and rhizospheric microbes.Results: In this study, young (0.5-yr), mature (2.5-yr and 4.5-yr) and old (6.5-yr) bamboo plants were selected in a moso bamboo field, and above-ground tissues, below-ground roots (rhizomes) and rhizospheric soils were sampled. The bamboo biomass, soil properties and endophytic microbes were determined and quantify their comprehensive relationships. Bamboo ages had negligible impacts on the bamboo height, diameter at breast height and above-ground biomass. Organic matter and nitrogen (N) contents in the rhizospheric soil of the 0.5-yr bamboo were significantly higher than those of the other three age groups. The rhizospheric soil of the 6.5-yr bamboo had the lowest N mineralization rate and urease activity. Significant differences in bacterial and fungal communities were found in the above-ground tissues but not in the rhizospheric soils associated with plants of different ages. Bacterial and fungal community structures in the above-ground tissues were significantly different from their counterparts in the rhizospheric soils. Conclusions: Bamboo ages significantly affected N transformation rates, functional gene abundances and urease activities of rhizospheric soils and endophytic bacterial community structures. However, niche differentiations outweighed ages in shaping the whole microbial communities of bamboo aboveground tissues, roots and rhizospheric soils. In the future, moso bamboo management should consider balanced applications of ammonium-N and other nutrients and utilisations of Chytridiomycota to stimulate moso bamboo growth.

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An Ultrastructural Study of the Proliferation Patterns of the Reserve Cells of the Human Cervix Uteri

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s0424820100093651 ◽

1972 ◽

Vol 30 ◽

pp. 80-81

Author(s):

Takanori Sohda ◽

Hiroshi Saito ◽

Goro Asano ◽

Katsunari Fukushi ◽

Katsuya Suzuki ◽

...

Keyword(s):

Ultrastructural Study ◽

Age Groups ◽

Point Of View ◽

University Hospital ◽

Cervix Uteri ◽

Morphological Aspect ◽

Functional Aspect ◽

Pathological Conditions ◽

Human Cervix ◽

Morphological Patterns

Recently, the functional aspect as well as morphological aspect of the reserve cells in the cervix uteri drew much attention in view of the carcinogenesis in squamocolumunar junction. In this communication, the authors elucidate the ultrastructural features of the reserve cells in patients of various age groups visiting our university hospital and affiliated hospital.From conventional light microscopic point of view, the reserve cells tend to be pronounced in various pathological conditions, such as the persisting inflammation, proliferative disorders and irritation of hormones. The morphological patterns of the reserve cells from various stage and degree of irritation were observed.

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Effects of aging on axon terminals in the dentate molecular layer

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s0424820100128924 ◽

1987 ◽

Vol 45 ◽

pp. 928-929

Author(s):

K. Cullen-Dockstader ◽

E. Fifkova

Keyword(s):

Granule Cells ◽

Molecular Layer ◽

Age Groups ◽

Long Term Potentiation ◽

Male Rats ◽

Perforant Path ◽

Axon Terminals ◽

Fischer 344 ◽

Spatial Memory Deficit ◽

Effects Of Aging

Normal aging results in a pronounced spatial memory deficit associated with a rapid decay of long-term potentiation at the synapses between the perforant path and spines in the medial and distal thirds of the dentate molecular layer (DML), suggesting the alteration of synaptic transmission in the dentate fascia. While the number of dentate granule cells remains unchanged, and there are no obvious pathological changes in these cells associated with increasing age, the density of their axospinous contacts has been shown to decrease. There are indications that the presynaptic element is affected by senescence before the postsynaptic element, yet little attention has been given to the fine structure of the remaining axon terminals. Therefore, we studied the axon terminals of the perforant path in the DML across three age groups.5 Male rats (Fischer 344) of each age group (3, 24 and 30 months), were perfused through the aorta.

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RTS,S/AS01, a vaccine targeting pre-erythrocytic stages of Plasmodium falciparum

Emerging Topics in Life Sciences ◽

10.1042/etls20170101 ◽

2017 ◽

Vol 1 (6) ◽

pp. 533-537

Author(s):

Lorenz von Seidlein ◽

Borimas Hanboonkunupakarn ◽

Podjanee Jittmala ◽

Sasithon Pukrittayakamee

Keyword(s):

Protective Efficacy ◽

Age Groups ◽

Sub Saharan Africa ◽

Phase Iii ◽

European Medicines Agency ◽

Older Children ◽

Pivotal Phase ◽

Malaria Epidemiology ◽

Maximum Benefit ◽

Sub Saharan

RTS,S/AS01 is the most advanced vaccine to prevent malaria. It is safe and moderately effective. A large pivotal phase III trial in over 15 000 young children in sub-Saharan Africa completed in 2014 showed that the vaccine could protect around one-third of children (aged 5–17 months) and one-fourth of infants (aged 6–12 weeks) from uncomplicated falciparum malaria. The European Medicines Agency approved licensing and programmatic roll-out of the RTSS vaccine in malaria endemic countries in sub-Saharan Africa. WHO is planning further studies in a large Malaria Vaccine Implementation Programme, in more than 400 000 young African children. With the changing malaria epidemiology in Africa resulting in older children at risk, alternative modes of employment are under evaluation, for example the use of RTS,S/AS01 in older children as part of seasonal malaria prophylaxis. Another strategy is combining mass drug administrations with mass vaccine campaigns for all age groups in regional malaria elimination campaigns. A phase II trial is ongoing to evaluate the safety and immunogenicity of the RTSS in combination with antimalarial drugs in Thailand. Such novel approaches aim to extract the maximum benefit from the well-documented, short-lasting protective efficacy of RTS,S/AS01.

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Cognitive Load Affects Speech Motor Performance Differently in Older and Younger Adults

Journal of Speech Language and Hearing Research ◽

10.1044/2018_jslhr-s-17-0222 ◽

2019 ◽

Vol 62 (5) ◽

pp. 1258-1277 ◽

Cited By ~ 1

Author(s):

Megan K. MacPherson

Keyword(s):

Older Adults ◽

Cognitive Load ◽

Motor Performance ◽

Age Groups ◽

Incongruent Condition ◽

Sentence Production ◽

Movement Duration ◽

Production Task ◽

Younger Adults ◽

Speech Motor

PurposeThe aim of this study was to determine the impact of cognitive load imposed by a speech production task on the speech motor performance of healthy older and younger adults. Response inhibition, selective attention, and working memory were the primary cognitive processes of interest.MethodTwelve healthy older and 12 healthy younger adults produced multiple repetitions of 4 sentences containing an embedded Stroop task in 2 cognitive load conditions: congruent and incongruent. The incongruent condition, which required participants to suppress orthographic information to say the font colors in which color words were written, represented an increase in cognitive load relative to the congruent condition in which word text and font color matched. Kinematic measures of articulatory coordination variability and movement duration as well as a behavioral measure of sentence production accuracy were compared between groups and conditions and across 3 sentence segments (pre-, during-, and post-Stroop).ResultsIncreased cognitive load in the incongruent condition was associated with increased articulatory coordination variability and movement duration, compared to the congruent Stroop condition, for both age groups. Overall, the effect of increased cognitive load was greater for older adults than younger adults and was greatest in the portion of the sentence in which cognitive load was manipulated (during-Stroop), followed by the pre-Stroop segment. Sentence production accuracy was reduced for older adults in the incongruent condition.ConclusionsIncreased cognitive load involving response inhibition, selective attention, and working memory processes within a speech production task disrupted both the stability and timing with which speech was produced by both age groups. Older adults' speech motor performance may have been more affected due to age-related changes in cognitive and motoric functions that result in altered motor cognition.

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Perceptions of Stuttering of Different Age Groups

Perspectives of the ASHA Special Interest Groups ◽

10.1044/2019_pers-sig4-2018-0007 ◽

2019 ◽

Vol 4 (6) ◽

pp. 1311-1315

Author(s):

Sergey M. Kondrashov ◽

John A. Tetnowski

Keyword(s):

Age Groups ◽

School Age Children ◽

Clinical Implications ◽

School Age ◽

Fourth Edition ◽

Self Perception ◽

Behavioral Measures ◽

Self Rating ◽

Comparison Results ◽

Subject Pool

Purpose The purpose of this study was to assess the perceptions of stuttering of school-age children who stutter and those of adults who stutter through the use of the same tools that could be commonly used by clinicians. Method Twenty-three participants across various ages and stuttering severity were administered both the Stuttering Severity Instrument–Fourth Edition (SSI-4; Riley, 2009 ) and the Wright & Ayre Stuttering Self-Rating Profile ( Wright & Ayre, 2000 ). Comparisons were made between severity of behavioral measures of stuttering made by the SSI-4 and by age (child/adult). Results Significant differences were obtained for the age comparison but not for the severity comparison. Results are explained in terms of the correlation between severity equivalents of the SSI-4 and the Wright & Ayre Stuttering Self-Rating Profile scores, with clinical implications justifying multi-aspect assessment. Conclusions Clinical implications indicate that self-perception and impact of stuttering must not be assumed and should be evaluated for individual participants. Research implications include further study with a larger subject pool and various levels of stuttering severity.

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Impairment Tutorial: Rating Tears of the Acetabular Labrum

Guides Newsletter ◽

10.1001/amaguidesnewsletters.2006.novdec02 ◽

2006 ◽

Vol 11 (6) ◽

pp. 4-7

Author(s):

Charles N. Brooks ◽

Richard E. Strain ◽

James B. Talmage

Keyword(s):

Magnetic Resonance ◽

Hip Arthroscopy ◽

Age Groups ◽

Limited Range ◽

Labral Repair ◽

X Rays ◽

Joint Stability ◽

Acetabular Labrum ◽

Complete Excision ◽

Limited Range Of Motion

Abstract The primary function of the acetabular labrum, like that of the glenoid, is to deepen the socket and improve joint stability. Tears of the acetabular labrum are common in older adults but occur in all age groups and with equal frequency in males and females. The AMA Guides to the Evaluation of Permanent Impairment (AMA Guides), Fifth Edition, is silent about rating tears, partial or complete excision, or repair of the acetabular labrum. Provocative tests to detect acetabular labrum tears involve hip flexion and rotation; all rely on production of pain in the groin (typically), clicking, and/or locking with passive or active hip motions. Diagnostic tests or procedures rely on x-rays, conventional arthrography, computerized tomography, magnetic resonance imaging (MRI), magnetic resonance arthrography (MRA), and hip arthroscopy. Hip arthroscopy is the gold standard for diagnosis but is the most invasive and most likely to result in complications, and MRA is about three times more sensitive and accurate in detecting acetabular labral tears than MRI alone. Surgical treatment for acetabular labrum tears usually consists of arthroscopic debridement; results tend to be better in younger patients. In general, an acetabular labral tear, partial labrectomy, or labral repair warrants a rating of 2% lower extremity impairment. Evaluators should avoid double dipping (eg, using both a Diagnosis-related estimates and limited range-of-motion tests).

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