scholarly journals Population fluctuation and food preference of African snail by horticulture crops

2018 ◽  
Vol 85 (0) ◽  
Author(s):  
Lindinalva dos Santos ◽  
Carla Ruth de Carvalho Barbosa-Negrisoli ◽  
Maciel Bispo dos Santos ◽  
Aldomário Santo Negrisoli Junior

ABSTRACT: The African snail Achatina fulica (Bowdich, 1822), originally from Africa, was introduced in Brazil and since then became an important pest, because of its resistance to abiotic conditions, hermaphroditism, polyphagia and absence of natural enemies. Considered as one of the 100 worst pests in the world, with the record of establishment in almost all Brazilian states, it causes sanitary, ecological and economic losses. In this context, the objective of this study was to determine the population dynamics and food preference of the giant snail in three areas of lettuce, located in Alagoas, Brazil. There was no statistical difference between food preference tests with and without choice among the varieties offered. To the fluctuation of the population of A. fulica, the Pearson correlation coefficients were negative only for temperature, and there was no correlation with precipitation and relative humidity.

2021 ◽  
Vol 8 (8) ◽  
pp. 470-474
Author(s):  
Mesut Aydin

Objective: Brucellosis is a zoonotic disease seen widely around the world. Although many aspects and treatment of this disease is well known, peritoneal involvement and ascites is not well established so far. Material and Methods: This study retrospectively enrolled 346 adult patients (aged >17 years) with acute Brucellosis attending Hepatology Clinic, Van Yuzuncu Yil University, between April 2013 and May 2016. Characteristics of those with and without ascites were analyzed using Pearson correlation coefficients and Chi-Square test in SPSS software system. Results: Of the 346 cases, 20 (5, 7%) had ascites. Those with ascites had significantly higher transaminase, cholestatic enzyme and amylase levels compared to those without ascites. Conclusions: We conclude that acute Brucella infection can lead to a unique low gradient ascites probably resulting from pancreatic leakage followed by peritoneal accumulation of serum proteins.


Phytotaxa ◽  
2016 ◽  
Vol 278 (3) ◽  
pp. 181 ◽  
Author(s):  
MAŁGORZATA PONIEWOZIK

I examined representatives of the genus Trachelomonas from two water bodies in eastern Poland. Using both light and scanning microscopy, a total of 47 taxa were recorded during two years of study. Among the 47 taxa, 7 were new to Poland (T. botanica var. minor, T. manginii, T. obovata var. klebsiana, T. zorensis, T. mirabilis var. obesa, T. raciborskii var. incerta and T. woycickii f. pusilla). All taxa found were briefly described and originally illustrated, and I added taxonomical comments to almost all of them. These taxonomical comments may be helpful in further research because at present, taxonomical identification of species during environmental research is still based on the morphology of trachelomonad envelopes. Taxonomists around the world use key books for identification, which were written based on (often old) data concerning the external structure of envelopes. My study provided valuable information on similarities and differences between taxa that appear very similar. I also provided information on the ecology and biogeography of the reported taxa. For three of the taxa (T. volvocinopsis f. volvocinopsis, T. volvocina var. volvocina, T. hispida var. hispida), which were characterised by the highest frequency of occurrence during the studies, I examined and analysed their presence in different abiotic conditions (both water reaction and water temperature). The data showed that the taxa preferred alkaline water conditions, with the median pH for the species ranging from 7.9 to 8.8. T. volvocinospis occurred in the broadest pH range and preferred cooler waters, whereas T. hispida var. hispida was most often observed in warm water.


2012 ◽  
Vol 16 (10) ◽  
pp. 1782-1788 ◽  
Author(s):  
Mahshid Dehghan ◽  
Solange Martinez ◽  
Xiaohe Zhang ◽  
Pamela Seron ◽  
Fernando Lanas ◽  
...  

AbstractObjectiveFFQ are commonly used to rank individuals by their food and nutrient intakes in large epidemiological studies. The purpose of the present study was to develop and validate an FFQ to rank individuals participating in an ongoing Prospective Urban and Rural Epidemiological (PURE) study in Chile.DesignAn FFQ and four 24 h dietary recalls were completed over 1 year. Pearson correlation coefficients, energy-adjusted and de-attenuated correlations and weighted kappa were computed between the dietary recalls and the FFQ. The level of agreement between the two dietary assessment methods was evaluated by Bland–Altman analysis.SettingTemuco, Chile.SubjectsOverall, 166 women and men enrolled in the present study. One hundred men and women participated in FFQ development and sixty-six individuals participated in FFQ validation.ResultsThe FFQ consisted of 109 food items. For nutrients, the crude correlation coefficients between the dietary recalls and FFQ varied from 0·14 (protein) to 0·44 (fat). Energy adjustment and de-attenuation improved correlation coefficients and almost all correlation coefficients exceeded 0·40. Similar correlation coefficients were observed for food groups; the highest de-attenuated energy-adjusted correlation coefficient was found for margarine and butter (0·75) and the lowest for potatoes (0·12).ConclusionsThe FFQ showed moderate to high agreement for most nutrients and food groups, and can be used to rank individuals based on energy, nutrient and food intakes. The validation study was conducted in a unique setting and indicated that the tool is valid for use by adults in Chile.


1995 ◽  
Vol 25 (12) ◽  
pp. 1944-1952 ◽  
Author(s):  
Ben A. Bergmann ◽  
Anne-Marie Stomp ◽  
Sue D. Carson

Twenty-nine full-sib crosses were used in an in vitro adventitious shoot production trial with Pinusradiata D. Don. Analyses with four pairs of reciprocal crosses showed that seed-size effects are significant for seed weight prior to tissue culture and embryo weight after 6 days in vitro. However, no significant influence of initial seed size was found on any other interim tissue-culture trait or on final shoot production. Narrow-sense heritabilities, calculated using nine half-sib families each comprising two full-sib crosses, were high for most tissue culture traits. For number of shoots per embryo they were 0.53 ± 0.22 based on individuals and 0.94 based on family means. Subsets of the families used in the tissue-culture study were represented in two field trials. One included parents of 11 of the control-pollinated families, and one included offspring from 13 of the control-pollinated families. Nine families were common to both field trials. Pearson correlation coefficients were determined between each of 13 in vitro traits and six field characteristics measured in one trial and seven traits in the other trial (five traits in common between the two field trials). Almost all correlations were nonsignificant. The significant correlations found were fewer than the number to be expected by chance alone when calculating such a large number of correlations. Thus, this study provides no evidence for significant associations between the in vitro traits measured, including frequency of highly proliferative embryos and shoot production per embryo, and the field characteristics assessed, including diameter, straightness, malformation, branch habit, needle retention, percent acceptable stems, Dothistroma resistance, and pilodyn rating.


2018 ◽  
Vol 620 ◽  
pp. A109 ◽  
Author(s):  
Wasim Iqbal ◽  
Valentine Wakelam ◽  
Pierre Gratier

Contact. Diffusion of species on the dust surface is a key process for determining the chemical composition of interstellar ices. On the dust surface, adsorbed species diffuse from one potential well to another and react with other adsorbed reactants, resulting in the formation of simple and complex molecules. Aims. We study the impact on the abundances of the species simulated by the chemical codes by considering the uncertainties in the diffusion energy of adsorbed species. We aim to limit the uncertainties in the abundances as calculated by chemical codes by identifying the surface species that result in a larger error because of the uncertainties in their diffusion energy. Methods. We ran various cases with 2000–10 000 simulations in each case and varied the diffusion energies of some or all surface species randomly. We calculated Pearson correlation coefficients between the abundances and the ratio of diffusion to binding energy of adsorbed species. We identified the species that introduce maximum uncertainty in the ice and gas-phase abundances. With these species we ran three sets, with 2000 simulations in each, to quantify the uncertainties they introduce. Results. We present the abundances of various molecules in the gas phase and also on the dust surface at different time intervals during the simulation. We show which species produce a large uncertainty in the abundances. We sorted species into different groups in accordance with their importance in propagating uncertainty in the chemical network. Conclusions. We show that CO, H2, O, N, and CH3 are the key species for uncertainties in the abundances, while CH2, HCO, S and O2 come next, followed by NO, HS, and CH. We also show that by limiting the uncertainties in the ratio of diffusion to binding energy of these species, we can eliminate the uncertainties in the gas-phase abundances of almost all the species.


2017 ◽  
Vol 62 (3) ◽  
Author(s):  
Bu-Yong Wang ◽  
Rong-Rong Wen ◽  
Ling Ma

Abstract, the nematode agent of rice tip white disease, causes huge economic losses in almost all the rice-growing regions of the world. Glutathione peroxidase (GPx), an esophageal glands secretion protein, plays important roles in the parasitism, immune evasion, reproduction and pathogenesis of many plant-parasitic nematodes (PPNs). Therefore, GPx is a promising target for control


2020 ◽  
Vol 29 (3) ◽  
pp. 429-435
Author(s):  
Patricia C. Mancini ◽  
Richard S. Tyler ◽  
Hyung Jin Jun ◽  
Tang-Chuan Wang ◽  
Helena Ji ◽  
...  

Purpose The minimum masking level (MML) is the minimum intensity of a stimulus required to just totally mask the tinnitus. Treatments aimed at reducing the tinnitus itself should attempt to measure the magnitude of the tinnitus. The objective of this study was to evaluate the reliability of the MML. Method Sample consisted of 59 tinnitus patients who reported stable tinnitus. We obtained MML measures on two visits, separated by about 2–3 weeks. We used two noise types: speech-shaped noise and high-frequency emphasis noise. We also investigated the relationship between the MML and tinnitus loudness estimates and the Tinnitus Handicap Questionnaire (THQ). Results There were differences across the different noise types. The within-session standard deviation averaged across subjects varied between 1.3 and 1.8 dB. Across the two sessions, the Pearson correlation coefficients, range was r = .84. There was a weak relationship between the dB SL MML and loudness, and between the MML and the THQ. A moderate correlation ( r = .44) was found between the THQ and loudness estimates. Conclusions We conclude that the dB SL MML can be a reliable estimate of tinnitus magnitude, with expected standard deviations in trained subjects of about 1.5 dB. It appears that the dB SL MML and loudness estimates are not closely related.


2001 ◽  
pp. 13-17
Author(s):  
Serhii Viktorovych Svystunov

In the 21st century, the world became a sign of globalization: global conflicts, global disasters, global economy, global Internet, etc. The Polish researcher Casimir Zhigulsky defines globalization as a kind of process, that is, the target set of characteristic changes that develop over time and occur in the modern world. These changes in general are reduced to mutual rapprochement, reduction of distances, the rapid appearance of a large number of different connections, contacts, exchanges, and to increase the dependence of society in almost all spheres of his life from what is happening in other, often very remote regions of the world.


Moreana ◽  
2005 ◽  
Vol 42 (Number 164) (4) ◽  
pp. 187-206
Author(s):  
Clare M. Murphy

The Thomas More Society of Buenos Aires begins or ends almost all its events by reciting in both English and Spanish a prayer written by More in the margins of his Book of Hours probably while he was a prisoner in the Tower of London. After a short history of what is called Thomas More’s Prayer Book, the author studies the prayer as a poem written in the form of a psalm according to the structure of Hebrew poetry, and looks at the poem’s content as a psalm of lament.


2019 ◽  
Vol 10 (10) ◽  
pp. 1003-1008
Author(s):  
Hiroyuki Matsuoka ◽  

In the world auto market, top three companies are VW(Volkswagen), Runault-Nissan-Mistubishi, and Toyota. About some selected countries and areas, China, England, Italy, Australia, Germany, Turkey, Russia, Sweden, USA, Brazil, UAE, Japan, Vietnam and Thailand are more competitive. However, the situation is different. Seeing monopolistic market countries and areas, Saudi Arabia, Taiwan, Korea, Malaysia, France, India, and Pakistan, in particular, the influence of Japan to Taiwan, India, and Pakistan is very big. But in Korea and France, their own companies’ brands occupy the market. In Japan domestic market, the overall situation is competitive. Almost all vehicles made in Japan are Japanese brand. From now on, we have to note the development of electric vehicle (EV) and other new technologies such as automatic driving and connected car. That is because they will give a great impact on the auto industry and market of Japan. Now Japan’s auto industry is going to be consolidated into three groups, Honda, Toyota group, and Renault-Nissan-Mitsubishi group for seeking the scale merit of economy. Therefore, I will pay attention to the worldwide development of EV and other new technologies and the reorganization of auto companies groups.


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