scholarly journals Role of Endogenous Allelochemicals in Host Plant Resistance to Japanese Beetles

HortScience ◽  
1995 ◽  
Vol 30 (4) ◽  
pp. 767E-767
Author(s):  
Thomas G. Ranney ◽  
James D. Burton ◽  
James F. Walgenbach ◽  
D. Mason Pharr ◽  
Cindy A. Patton ◽  
...  

No-choice feeding trials were conducted with adult Japanese beetles on leaves from 14 taxa of rosaceous trees. Feeding intensity (leaf area consumption) ranged from 0.08 to 6.1 cm2/day for Prunus virginiana and P. sargentii, respectively. Analysis of endogenous chemical constituents suggested that the mechanisms of resistance varied for the different plant genera. Among the Prunus taxa there was a significant negative correlation between cyanide potential and feeding intensity (r = –0.56). Tissue toughness (resistance to tearing) was also negatively correlated with feeding intensity (r = –0.39) for all taxa. Soluble sugars (glucose, fructose, sucrose, and sorbitol) had no significant phagostimulatory effect, separately or in combination.

2022 ◽  
Vol 12 ◽  
Author(s):  
Majid Heidari Jamebozorgi ◽  
Ali Karamoozian ◽  
Tayebe Ilaghinezhad Bardsiri ◽  
Hojjat Sheikhbardsiri

BackgroundIn the recent pandemic, nurses have faced workload and being exposed to burnout. Resilience helps address work-related psychological problems such as stressful events and burnout. According to the roles of nurses in the healthcare system, we investigated the relationship between resiliency and burnout in nurses.Material and MethodsIn this descriptive analytical cross-sectional study, 364 nurses participated from April to June 2021. Census sampling was used to recruit participants. Maslach burnout inventory (MBI), Connor-Davidson Resiliency Scale (CDRISC), and a demographic check-list were utilized to collect data. Data analysis was done using SPSS version 22. Shapiro-Wilk, Kruskal–Wallis test, Mann–Whitney U-test, correlation analysis, and generalized linear model were applied accordingly.ResultsOverall, the findings showed that nurses had severe symptoms of burnout and a moderate level of resilience. The two domains of burnout, emotional exhaustion and personal accomplishment had a significantly negative correlation with resilience (r = −0.442, p < 0.001 and r = −0.351, p = 0.03, respectively). Linear regression showed that demographic characteristics (Hospital type, ward type, gender, and overtime) were the major predictors of the 3 sub-categories of burnout. A significant negative correlation was observed between burnout and resilience highlighting the role of resilience in reducing burnout (P < 0.05).ConclusionIn order to help nurses to tackle and endure burnout in pandemic times, there is a need to implement national and local policies to help them accordingly.


2015 ◽  
Vol 59 (2) ◽  
pp. 303-309
Author(s):  
Renli Jiang ◽  
Li Gao ◽  
Guanying Wang ◽  
Xinran Li ◽  
Yue Li ◽  
...  

Abstract Horses (n = 20) were divided into 2 groups: oligofructose (OF)-induced equine laminitis group (group OF; n = 11) which received 10 g/kg b.w. of OF dissolved in 4 L water via nasogastric intubation, and control group (NS; n = 9) which received 4 L of saline. Blood was collected at 4 h intervals over 72 h study period and analysed by ELISA, kinetic limulus amoebocyte lysate assay, and glucose-oxidase methods. The level of insulin changed significantly in horses which received OF (P < 0.01); there was a significant negative correlation between the level of adiponectin and insulin over time. The results suggested that insulin may play an important role in the development of OF-induced equine laminitis by altering the level of endothelin-1 and nitric oxide.


2020 ◽  
pp. 027623662095628
Author(s):  
Damla E. Aksen ◽  
Craig Polizzi ◽  
Steven Jay Lynn

We evaluated variables important to understanding dissociation ( N = 379 undergraduates). We investigated: (a) the correlations among dissociation and impulsivity, alexithymia, mindfulness, negative affect, neuroticism, sleep disturbances, and emotion dysregulation; (b) unique variance of these variables in statistically predicting dissociation scores; and (c) the statistical mediational role of emotion dysregulation and sleep in explaining dissociation. We found significant positive correlations between dissociation and emotion dysregulation, sleep, alexithymia, negative affect, impulsivity, and neuroticism as well as a significant negative correlation between mindfulness and dissociation, consistent with Lynn et al . Sleep, impulsivity, emotion dysregulation, and negative affect uniquely related to and explained significant variance in dissociation, in order from most to least variance accounted for. Sleep partially mediated the relation between emotion dysregulation and dissociation and the relation between impulsivity and dissociation. Emotion dysregulation partially mediated the relation between sleep and dissociation and the relation between impulsivity and dissociation. Additional findings provided support for bidirectional relations between sleep experiences and dissociation and emotion dysregulation and dissociation.


1981 ◽  
Author(s):  
M Livio ◽  
D Marchesi ◽  
G Mecca ◽  
G Remuzzi ◽  
M B Donati ◽  
...  

The bleeding times (B.T.) of 65 patients with chronic uraemia were determined inmediately before a routine haonodialysis session. A significant negative correlation (r=0.67, p < 0.01) was found between B.T. and packed cell volume (PCV) values. When the patients with bleeding times longer than 15 min were excluded frcm the analysis, a negative correlation with PCV was still apparent (r = 0.55; p<0.01 ) .in addition, X2 analysis showed a significant association between PCV values <30% and B.T. longer than 260 sec(p<0.001) . Fourteen uraemic patients with PC/ values between 13% and 27% and B.T. longer than 15 min, required washed blood cell transfusions, after which PCV values increased variably but no shortening of B.T. was observed unless PCV rose to at least 30%. In particular, 2 uraemic patients with B.T. >15 min and PCV values of 21% and 19% were transfused on several occasions. PCV rose to 23%, 30% and 35% in the first patient and to 25% and 34% in the second one. The corresponding B.T. were >15 min,>15 min and 0 min 30 sec and > 15 and 9 min 30 sec. In a group of 15 patients with uraemia-unrelated anemias (PCV between 20% and 34%) the median B.T. was 300 sec (range 120-450 sec) whereas in a group of 15 uraemic patients with comparable PCV values, the median B.T. was 390 sec (range 180 - 900 sec) (p<0.05, paired student's t test) . It is concluded that among other factors red cells may contribute to the defective haemostasis in uraemic patients.


2021 ◽  
Author(s):  
Hiroyuki Iuchi ◽  
Junichiro Ohori ◽  
Takeshi Tokushige ◽  
Satoshi Kiyama

Abstract Background: This study aimed to evaluate the influence of Phosphorylcholine (PC) expression on the adherence and invasion of Streptococcus pyogenes (S. pyogenes) to epithelial cells to clarify the potential effectiveness of a vaccine targeting PC. Methods: Eight clinical strains of S. pyogenes were cultured overnight, and PC expression was evaluated by fluorescence-activated cell sorting. Bacterial adherence and invasion were examined using Detroit 562 cells. An anti-PC-specific monoclonal antibody (TEPC-15) was used to inhibit bacterial PC, and a platelet-activating factor receptor (PAF-R) antagonist (ABT-491) was used to inhibit cellular PAF-R. Additionally, amplification of the emm gene was performed using polymerase chain reaction with the standard primers. Results: The level of PC expressed on the S. pyogenes surfaces differed in each strain. Furthermore, PC expression was different even in the same emm type. Adherence assay experiments showed that there was a significant negative correlation between TEPC-15 and ABT-491 inhibitory effects and PC expression in S. pyogenes. Similarly, intracellular invasion assay experiments showed that there was a significant negative correlation between TEPC-15 and ABT-491 inhibitory effects and PC expression in S. pyogenes. Conclusion: The present study suggests that PC is involved in the cell adhesion and invasion of S. pyogenes, regardless of the emm type.


2015 ◽  
Vol 2 (2) ◽  
Author(s):  
Masaud Ansari

An attempt was made to study impact of Emotional Maturity on Stress among Undergraduate students. The sample of the study was selected by using the purposive sampling technique. The sample consisted of 150; participant’s age range was 18 to 20 years. Emotional Maturity Scale constructed by Yashvir Singh and Mahesh Bhargava (2005) and Stress questionnaire developed by Latha and Satish (1997), was used for data collection. The Simple Linear Regression was used to determine the Correlation as well as Coefficient between Emotional Maturity and Stress among undergraduate students. The findings of the study revealed that a significant impact of Emotional Maturity was found on Stress among undergraduate students. There was also found significant negative correlation between Emotional Maturity and Stress. The result revealed that, when emotional maturity increases stress decreases and when emotional maturity decreases stress increases.


2008 ◽  
Vol 28 (S 01) ◽  
pp. S61-S66 ◽  
Author(s):  
G. Cvirn ◽  
A. Rosenkranz ◽  
B. Leschnik ◽  
W. Raith ◽  
W. Muntean ◽  
...  

SummaryThrombin generation was studied in paediatric patients with congenital heart disease (CHD) undergoing cardiac surgery using the calibrated automated thrombography (CAT) in terms of the lag time until the onset of thrombin formation, time to thrombin peak maximum (TTP), endogenous thrombin potential (ETP), and thrombin peak height. The suitability to determine the coagulation status of these patients was investigated. Patients, material, methods: CAT data of 40 patients with CHD (age range from newborn to 18 years) were compared to data using standard coagulation parameters such as prothrombin (FII), antithrombin (AT), tissue factor pathway inhibitor (TFPI), prothrombin fragment 1.2 (F 1.2), thrombin-antithrombin (TAT), activated partial thromboplastin time (aPTT), and prothrombin time (PT). Results: A significant positive correlation was seen between ETP and FII (p < 0.01; r = 0.369), as well as between peak height and F II (p < 0.01; r = 0.483). A significant negative correlation was seen between ETP and TFPI values (p < 0.05; r = –0.225) while no significant correlation was seen between peak height and TFPI. A significant negative correlation was seen between F 1.2 generation and ETP (p < 0.05; r = –0.254) and between F 1.2 generation and peak height (p < 0.05; r = –0.236). No correlation was seen between AT and ETP or peak. Conclusions: CAT is a good global test reflecting procoagulatory and inhibitory factors of the haemostatic system in paediatric patients with CHD.


2019 ◽  
Vol 19 (2) ◽  
pp. 120-126
Author(s):  
J. Wei ◽  
Y. Yu ◽  
Y. Feng ◽  
J. Zhang ◽  
Q. Jiang ◽  
...  

Background: Homocysteine (Hcy) has been suggested as an independent risk factor for atherosclerosis. Apolipoprotein M (apoM) is a constituent of the HDL particles. The goal of this study was to examine the serum levels of homocysteine and apoM and to determine whether homocysteine influences apoM synthesis. Methods: Serum levels of apoM and Hcy in 17 hyperhomocysteinemia (HHcy) patients and 19 controls were measured and their correlations were analyzed. Different concentrations of homocysteine (Hcy) and LY294002, a specific phosphoinositide 3- kinase (PI3K) inhibitor, were used to treat HepG2 cells. The mRNA levels were determined by RT-PCR and the apoM protein mass was measured by western blot. Results: We found that decreased serum apoM levels corresponded with serum HDL levels in HHcy patients, while the serum apoM levels showed a statistically significant negative correlation with the serum Hcy levels. Moreover, apoM mRNA and protein levels were significantly decreased after the administration of Hcy in HepG2 cells, and this effect could be abolished by addition of LY294002. Conclusions: resent study demonstrates that Hcy downregulates the expression of apoM by mechanisms involving the PI3K signal pathway.


2020 ◽  
Vol 6 (3) ◽  
pp. 172-187 ◽  
Author(s):  
Nikita Saraswat ◽  
Neetu Sachan ◽  
Phool Chandra

Introduction and Ethnopharmacological relevance: In the Indian Vedic literature, Charakasamhita and Sushritasamhita, the Ajwain is known as Bhootika and in the charaksamhita commentaries, it is termed as Yavanika. The medicinal role of Ajwain fruit is claimed to be very important in the treatment of many ailments in humans. The plant Trachyspermum ammi Linn. is a grassy, aromatic annual plant, which falls in the family Umbelliferae. This plant is grown in India, Iran, Pakistan, Egypt, etc. for its medicinal benefits. Tribals of India use it for the treatment of diarrhea, arthritis, colic and gastrointestinal problems. In the traditional preparations, Indian Vaidya guru’s (Ayurveda Guru’s), the ajwain extract is used as “Admoda Arka”. The Ayurveda doctors, hakims and Vaidya gurus recommend ajwain for treating headaches, cold, flu and even during painful menstrual periods. Aim of the Study: The review paper has compiled the researches conducted on Trachyspermum ammi, which will help in presenting a collective data of the authentic researches conducted on the plant worldwide. It will also present information about the phytoconstituents which can be useful for building up new researches in near future. Materials and Methods: This paper has been prepared by collecting all the information available on the following platforms and the papers were searched from 1975 to 2019. The databases and electronic journals were well searched including Wiley, Springer link, Google Scholar, Science Direct, Pubmed. The key terms used for the search were Ajwain, C. copticum, Trachyspermum ammi and other synonyms of the plant. The search was also done by the names of chemical constituents present in the plant and the pharmacological effect of the plant. Results: The multiple uses of T. ammi are due to the active constituents present in it. As per the phytochemical studies on the fruits of T. ammi, the presence of various phytoconstituents has been found such as saponins, flavonoids, alkaloids, glycosides, fixed oils, thymenes, cumenes, tannins, amino acids, p-cymene, c-terpinene, steroids, etc. Conclusions: This paper is focused on presenting a detailed review on the literature, pharmacological properties, physicochemical studies and the newest researches on the plant. In this paper, we have also compiled the traditional uses of the herb used by Indian peopleon recommendations from their Hakims, Vaidya and use of the herbs by many tribes all across India and Pakistan.


Author(s):  
Dianna Preece

The role of commodities in a diversified portfolio has been the subject of research and debate since the late 1970s. Investors can hold the physical commodity or use derivatives such as futures contracts to access commodity exposure. Institutional investors primarily gain exposure to commodities via futures contracts. Commodity futures returns are comprised of a collateral return, a spot return, and a roll return. Research dating back to the late 1970s suggests that commodities should be included in diversified portfolios because they act as an inflation hedge, are portfolio diversifiers due to negative correlation with stocks and bonds, and potentially offer returns and volatility comparable to equities. Commodity performance has been generally weak in the years following the financial crisis of 2007–2008. Many studies find that correlation of commodity returns with stocks and bonds increases during periods of financial stress.


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