Differences in clonal integration between the sexes: long-term demographic patterns in the dioecious, multi-stemmed shrub Lindera triloba

Botany ◽  
2012 ◽  
Vol 90 (10) ◽  
pp. 1028-1035 ◽  
Author(s):  
Michinari Matsushita ◽  
Nobuhiro Tomaru
Keyword(s):  
Survival Rates ◽  
Clonal Plants ◽  
Clonal Integration ◽  
Growth And Survival ◽  
Factors Affecting ◽  
Old Growth Forest ◽  
Demographic Processes ◽  
Demographic Patterns

In clonal plants, ramets connected within a genet can share resources through clonal integration, and clonal integration often facilitates the growth and survival of young ramets. However, in dioecious plants, it is not fully understood whether female and male genets differ in their integration patterns affecting the demographic processes. To test between-sex differences in the demographic process in relation to clonal integration, we conducted a long-term census for the dioecious sprouting shrub Lindera triloba (Sieb. et Zucc.) Blume. In an old-growth forest, we selected 73 female and 82 male genets, and the recruitment, growth, and mortality of ramets within those genets were monitored over six years. Ramet recruitment was greater in males than in females, whereas ramet growth and survival rates did not differ, on average, between sexes. Females and males showed different sensitivities to factors affecting their ramet dynamics. The ramet recruitment, growth, and survival within male genets were significantly positively affected by the largest main ramet size, whereas females were not sensitive to the effect. This suggested that demographic patterns of ramets within male genets were more sensitive to assimilates translocated from the main ramets than those within female genets, and the role of clonal integration worked differently on ramet dynamics between sexes.

scholarly journals Rural Households’ Poverty and Relocation and Settlement: Evidence from Western China

2019 ◽  
Vol 16 (14) ◽  
pp. 2609 ◽  
Author(s):  
Wei Liu ◽  
Jie Xu ◽  
Jie Li ◽  
Shuzhuo Li
Keyword(s):  
Logistic Model ◽  
Rural Households ◽  
Western China ◽  
Multinomial Logistic Model ◽  
Factors Affecting ◽  
Chronic Poverty ◽  
Southern Shaanxi ◽  
Transient Poverty

Based on survey data collected from five counties across southern Shaanxi, China, the present study employs a multinomial logistic model to explore the main factors related to the type of poverty of rural households, particularly focusing on the role of relocation time, reason for relocation, and type of relocation. The results showed that three types of poverty, “voluntary poverty”, “transient poverty”, and “chronic poverty”, are distinguished by combining income and consumption criteria. Moreover, relocation and settlement programs contribute to a certain degree to these three kinds of poverty, and the effects vary according to the relocation characteristics. Specifically, those relocated long-term were more likely to be trapped in “voluntary poverty” and “chronic poverty”, whereas those relocated short-term were less likely to fall into “voluntary poverty” and “transient poverty”. The poverty alleviation and disaster-related resettlers were less likely to be trapped in “chronic poverty”, whereas centralized resettlers were less likely to be trapped in “voluntary poverty” and “chronic poverty”. Additionally, demographic characteristics, capital endowment variables, and geographical features are all important factors affecting rural households’ type of poverty. This study can serve as a reference for further resettlement practice in China and other developing countries.

scholarly journals Return to Work Among Stroke Survivors

2019 ◽  
Vol 67 (2) ◽  
pp. 87-94 ◽  
Author(s):  
Kristin D. Ashley ◽  
Loretta T. Lee ◽  
Karen Heaton
Keyword(s):  
Occupational Health ◽  
Return To Work ◽  
Quantitative Research ◽  
Stroke Severity ◽  
Stroke Survivors ◽  
Factors Affecting ◽  
Work And Employment ◽  
Subsequent Failure

Despite improvements in the treatment of stroke, many individuals still face cognitive, emotional, and physical impairments. Stroke is a leading cause of serious long-term disability and subsequent failure to return to work (RTW). The purpose of this literature review was to synthesize and discuss the literature relevant to factors affecting RTW for stroke survivors, summarize the identified gaps, and discuss steps occupational health nurses can take to facilitate RTW among stroke survivors. A literature search was conducted using the keywords: “stroke,” “cerebrovascular disease,” “return to work,” and “employment.” After excluding articles based on inclusion/exclusion criteria, 19 quantitative research articles were reviewed. Consistent themes found in the literature affecting RTW following stroke included physical, social, and cognitive factors. One of the most consistent predictors of RTW found was stroke severity. Individuals who experienced a mild to moderate stroke, those of Caucasian ethnicity, and higher socioeconomic levels were more likely to RTW. Findings suggest the importance of future studies to examine factors among African American stroke survivors that predict RTW and the role of occupational health nurses.

scholarly journals Macrophages in Organ Transplantation

2020 ◽  
Vol 11 ◽  
Author(s):  
Farideh Ordikhani ◽  
Venu Pothula ◽  
Rodrigo Sanchez-Tarjuelo ◽  
Stefan Jordan ◽  
Jordi Ochando
Keyword(s):  
Immune Response ◽  
Organ Transplantation ◽  
Survival Rates ◽  
Adaptive Immune Response ◽  
Phagocytic Cells ◽  
Term Survival ◽  
Vast Number ◽  
Monocytes And Macrophages

Current immunosuppressive therapy has led to excellent short-term survival rates in organ transplantation. However, long-term graft survival rates are suboptimal, and a vast number of allografts are gradually lost in the clinic. An increasing number of animal and clinical studies have demonstrated that monocytes and macrophages play a pivotal role in graft rejection, as these mononuclear phagocytic cells recognize alloantigens and trigger an inflammatory cascade that activate the adaptive immune response. Moreover, recent studies suggest that monocytes acquire a feature of memory recall response that is associated with a potent immune response. This form of memory is called “trained immunity,” and it is retained by mechanisms of epigenetic and metabolic changes in innate immune cells after exposure to particular ligands, which have a direct impact in allograft rejection. In this review article, we highlight the role of monocytes and macrophages in organ transplantation and summarize therapeutic approaches to promote tolerance through manipulation of monocytes and macrophages. These strategies may open new therapeutic opportunities to increase long-term transplant survival rates in the clinic.

Growth, survival and activity patterns of recently metamorphosed Bufo marinus

1993 ◽  
Vol 20 (1) ◽  
pp. 1 ◽  
Author(s):  
MP Cohen ◽  
RA Alford
Keyword(s):  
Profile Analysis ◽  
Activity Patterns ◽  
Survival Rates ◽  
Larval Habitat ◽  
Bufo Marinus ◽  
Daily Maximum ◽  
Growth And Survival ◽  
Factors Affecting ◽  
The Mean ◽  
Stage 1

We examined factors affecting the growth and survival of postmetamorphic Bufo marinus using sampling and experiments. Bufo metamorphs, defined as newly emerged terrestrial toads of 9-29mm snout-ischium length (SIL), were classified into four stages on the basis of colour and size. Stage 1 were uniformly black and about 9-12 mm SIL, stage 2 were mottled with orange spots and about 12-16mm SL, stage 3 had a white mid-dorsal line and were about 16-25mm SIL, and stage 4 had enlarged parotoid glands and were about 25-29 mm SIL. We determined the density of each stage at three distances (0-1, 2-3, 4-5m) from their larval habitat using 1 x 1-m quadrat samples. The mean densities of all metamorphs within 1 m of water were 2.6m-2 and 2.1m-2 for the wet and early dry seasons, respectively. The mean densities of all metamorphs during both seasons at 2-3m and 4-5m from water were 0.8m-2 and 0.6m-2, respectively. Stage 2 metamorphs were most common in samples. Most stage 1 metamorphs occurred within 1m of the water in both seasons (98% wet; 95% dry). Increasing percentages of stage 2, 3 and 4 metamorphs occurred in samples 2-3 and 4-5m from water (38, 49 and 80%, respectively, averaged over both seasons). Three experiments examined the response of metamorph growth and survival rates to density in open-topped flyscreen enclosures. Stage 1 or 2 metamorphs were established at initial densities of 3.3, 6.7 and 16.7m-2. Metamorphs in the lower-density enclosures grew more rapidly than metamorphs in the higher-density enclosures. A profile analysis showed that daily survival rate was not densitydependent. Correlation analyses showed that daily metamorph survival was influenced by daily maximum and minimum temperatures. Metamorphs at lower densities attain juvenile size (30mm) more rapidly; because they survive at the same daily rates as metamorphs at higher densities they experience lower cumulative mortality as metamorphs.

Knowledge Utilisation in AgriFood SMEs: Effects of Organisational and Informational Factors

2020 ◽  
Vol 8 (7) ◽  
pp. 235-248
Author(s):  
David Eshun Yawson
Keyword(s):  
Critical Role ◽  
User Interaction ◽  
Consumer Information ◽  
Partial Least Squares Analysis ◽  
Factors Affecting ◽  
Knowledge Utilisation ◽  
The Uk ◽  
Role Of Information

Given the critical role of information and marketing in SME management it is surprising that little attention has been paid to the salient factors that motivate or inhibits consumer information used by agrifood SMEs. A model of organisational and informational factors affecting knowledge utilisation in Agri-food SMEs is presented and empirically tested through partial least squares analysis via SmartPLS. The results of the empirical testing of the conceptual model provide evidence to indicate that functional and technical qualities, provider-user interaction and usefulness in the market environment are determinants of knowledge utilisation. The findings of this study have implications for agri-food SME management in the UK regarding their growth and competitiveness in the medium and long term.

scholarly journals Role of Radiotherapy in Modern Treatment of Hodgkin's Lymphoma

2011 ◽  
Vol 2011 ◽  
pp. 1-6 ◽  
Author(s):  
Kheng-Wei Yeoh ◽  
N. George Mikhaeel
Keyword(s):  
Hodgkin’S Lymphoma ◽  
Survival Rates ◽  
Hodgkin's Lymphoma ◽  
Ongoing Research ◽  
Modern Treatment ◽  
Modality Approach ◽  
Therapeutic Radiation ◽  
Modern Radiotherapy

Hodgkin's Lymphoma was incurable until the advent of effective therapeutic radiation around the first half of the 20th century. As survival rates improved, the long-term toxicities from radiotherapy began to emerge. This together with the availability of effective chemotherapy has encouraged a combined modality approach for early-staged disease and the omission of radiotherapy in advanced-staged disease. The differing toxicities of radiotherapy and chemotherapy has promoted ongoing research to identify the utility of each of these modalities in the modern management of Hodgkin's Lymphoma. This article will provide a critical review of the developments and indications for modern radiotherapy, in context with advances in chemotherapy, for the treatment of Hodgkin's Lymphoma.

scholarly journals Long-Term Survival of Campylobacter jejuni at Low Temperatures Is Dependent on Polynucleotide Phosphorylase Activity

2009 ◽  
Vol 75 (23) ◽  
pp. 7310-7318 ◽  
Author(s):  
Nabila Haddad ◽  
Christopher M. Burns ◽  
Jean Michel Bolla ◽  
Hervé Prévost ◽  
Michel Fédérighi ◽  
...  
Keyword(s):  
Campylobacter Jejuni ◽  
Low Temperatures ◽  
Survival Rates ◽  
Polynucleotide Phosphorylase ◽  
Wild Type ◽  
Term Survival ◽  
Poultry Products ◽  
Bacterial Gastroenteritis

ABSTRACT Campylobacter jejuni is a leading cause of bacterial gastroenteritis worldwide. Infection generally occurs after ingestion of contaminated poultry products, usually conserved at low temperatures. The mechanisms promoting survival of C. jejuni in the cold remain poorly understood despite several investigations. The present study provides insight into the survival mechanism by establishing the involvement of polynucleotide phosphorylase (PNPase), a 3′-5′ exoribonuclease with multiple biological functions in cold survival. The role of PNPase was demonstrated genetically using strains with altered pnp genes (which encode PNPase) created in C. jejuni F38011 and C. jejuni 81-76 backgrounds. Survival assays carried out at low temperatures (4 and 10°C) revealed a difference of 3 log CFU/ml between the wild-type and the pnp deletion (Δpnp) strains. This did not result from a general requirement for PNPase because survival rates of the strains were similar at higher growth temperatures (37 or 42°C). trans-Complementation with plasmid pNH04 carrying the pnp gene under the control of its natural promoter restored the cold survival phenotype to the pnp deletion strains (at 4 and 10°C) but not to the same level as the wild type. In this study we demonstrate the role of PNPase in low-temperature survival of C. jejuni and therefore attribute a novel biological function to PNPase directly related to human health.

Demographic Trends in Latvia

1984 ◽  
Vol 12 (1) ◽  
pp. 49-84 ◽  
Author(s):  
Juris Dreifelds
Keyword(s):  
Public Attention ◽  
Term Survival ◽  
Migration Patterns ◽  
North Americans ◽  
The Social ◽  
Urban Rural ◽  
Demographic Processes ◽  
Second World

For most North Americans demography is an esoteric subject more often tied to marketing than to social and political changes. In Latvia, as in most of Eastern Europe and the USSR, demography has long been placed on the forefront of public attention. This wave of attention in the case of Latvia is not a fad of short duration which will be readily displaced by other popular topics. On the contrary, demography has had, is having and will have a tremendous impact on a very broad range of policies and on the long term survival of the Latvian nation. Thus, in order to understand the social and ethnic tensions, the labour squeeze, and the welfare burden of Latvia, it is necessary to understand the multifaceted demographic processes: the real matrix of the political and social environment. This paper reviews the pivotal demographic role of the First and Second World Wars and analyzes population size, sex balance, age structure, urban-rural residence, nuptiality, birth and death rates, migration patterns and ethnic balance.

scholarly journals Determinanty generowania kredytów gospodarczych w okresie pokryzysowym na przykładzie polskiego sektora banków spółdzielczych

2015 ◽  
Vol 2 (3) ◽  
pp. 143-160
Author(s):  
Krzysztof Kil ◽  
Ewa Miklaszewska
Keyword(s):  
Balance Sheet ◽  
Local Market ◽  
Corporate Sector ◽  
Factors Affecting ◽  
Loan Portfolios ◽  
Area Growth ◽  
Cooperative Banks

The post-crisis period stressed the role of small, local banks in corporatelending, particularly for SME, due to such their advantages as being based onrelationship banking and extensive knowledge of local market. However, it isstill unclear whether it is a short or long-term advantage. The aim of this paper isto analyze the factors affecting the size and quality of the loan portfolios of thePolish cooperative banks. In the empirical part, the study is based on statisticaldata and panel research, based on individual balance sheet data for the banksaffiliated to the BPS SA. The results confirm that the role of cooperative banksin lending to businesses increases, but also pointed to internal diversity of thesector in this area: growth in loans to the corporate sector was particularly strongfor large banks with strong capital, but also resulted in their declining safety andincreasing bad loans portfolio.

scholarly journals Long term storage and the compensatory growth of white shrimp Litopenaeus vannamei in aquaculture ponds

2017 ◽  
Vol 44 (3) ◽  
pp. 588-594
Author(s):  
Geraldo Fóes ◽  
Dariano Krummenauer ◽  
Gabriele Lara ◽  
Luis Poersch ◽  
Wilson Wasielesky Jr.
Keyword(s):  
Compensatory Growth ◽  
Management Practices ◽  
Specific Growth ◽  
Survival Rates ◽  
White Shrimp ◽  
Growth And Survival ◽  
Conventional Management ◽  
Long Term Storage ◽  
Term Storage

Effects of shrimp confinement in a situation of high density stocking in a long term nursery on their growth performance in grow out ponds. Were analized two nurseries with a density of 2000 shrimp m-2 were stocked at two different times. The first nursery (LTN) lasted 144 days, and the SGR of the animals was 3.0% day-1. The second nursery (STN) lasted 18 days and the specific growth rate (SGR) was 19.9% day-1. On the same day, shrimps were transferred to six lined ponds at a density of 20 shrimp m2 where they remained for 101 days. In the first biometry, the SGR in the LTN treatment, increased to 6.7% day-1 and in the STN it decreased to 5.0% day-1. At the end, shrimps of the LTN and STN treatments reached weights of 8.46 and 6.72 g and had productivities of 1287 and 1015 kg ha-1, respectively. Shrimps reared in nurseries for long periods showed growth and survival rates similar to those obtained using conventional management practices in grow out structures.

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