Duality in non-linear programming for limit analysis of not resisting tension bodies

O. Corbi,A. Baratta 국제구조공학회 2007 Structural Engineering and Mechanics, An Int'l Jou Vol.26 No.1

In the paper, one focuses on the problem of duality in non-linear programming, applied to the solution of no-tension problems by means of Limit Analysis (LA) theorems for Not Resisting Tension (NRT) models. In details, one demonstrates that, starting from the application of the duality theory to the non-linear program defined by the static theorem approach for a discrete NRT model, this procedure results in the definition of a dual problem that has a significant physical meaning: the formulation of the kinematic theorem.

Influence of SMAs on the attenuation of effects of P-D type in shear frames

Ottavia Corbi 국제구조공학회 2003 Steel and Composite Structures, An International J Vol.3 No.6

In the paper one investigates the benefits deriving from the introduction of SMA provisions in a structure subject to dynamic excitation and vertical loads. At this purpose one considers a multi-degree-offreedom (mdof) shear elastic-plastic frame and designs couples of super-elastic SMA tendons to be placed at critical locations of the structure. Particular attention is focused on the reduction of P-D effects.

Duality in non-linear programming for limit analysis of not resisting tension bodies

Baratta, A.,Corbi, O. Techno-Press 2007 Structural Engineering and Mechanics, An Int'l Jou Vol.26 No.1

In the paper, one focuses on the problem of duality in non-linear programming, applied to the solution of no-tension problems by means of Limit Analysis (LA) theorems for Not Resisting Tension (NRT) models. In details, one demonstrates that, starting from the application of the duality theory to the non-linear program defined by the static theorem approach for a discrete NRT model, this procedure results in the definition of a dual problem that has a significant physical meaning: the formulation of the kinematic theorem.

MOLECULAR BIOLOGY : INHERITANCE OF VIRULENCE GENES IN NECTRIA HEAMATOCOCCA MATING POPULATION 6

( Hong Gi Kim,H . Corby Kistler ) 한국균학회 1992 MYCOLOGICAL SYMPOSIUM Vol.- No.-

Cardioprotection by Cocoa Polyphenols and ω-3 Fatty Acids: A Disease-Prevention Perspective on Aging-Associated Cardiovascular Risk

Sergio Davinelli,Graziamaria Corbi,Stefano Righetti,Barry Sears,Hector Hugo Olarte,Davide Grassi,Giovanni Scapagnini 한국식품영양과학회 2018 Journal of medicinal food Vol.21 No.10

Cardiovascular disease (CVD) remains the leading cause of death today. Many of the biochemical alterations associated with the pathophysiology of CVD can be modified by adequate intakes of bioactive nutrients through a correct diet or supplementation. Recently, there has been growing public and clinical interest in cocoa polyphenols (CPs) and omega-3 (ω-3) fatty acids. A plethora of nutritional intervention trials and experimental studies demonstrates that consumption of these bioactive food compounds is beneficial to promote cardiovascular health. The purpose of this review is to summarize the major cardioprotective effects of CPs and ω-3 fatty acids, providing a scientific rationale for incorporating the combination of these molecules as a nutritional intervention in the prevention of CVD. Although several studies have shown the individual cardioprotective nature of these compounds, a combination treatment with CPs and ω-3 fatty acids may be a promising approach to enhance the preventive value of these molecules and reduce cardiovascular risk factors associated with aging. Therefore, this article also reviews some of the key studies on the interaction between CPs and the metabolism of ω-3 fatty acids.

Dietary Herbal Supplements with Phenylephrine for Weight Loss

Frank Greenway,Lilian de Jonge-Levitan,Corby?artin,Andrew Roberts,Irene Grundy,Catherine Parker 한국식품영양과학회 2006 Journal of medicinal food Vol.9 No.4

This study was designed to evaluate the efficacy and safety of a dietary herbal supplement containing citrusaurantium and phenylephrine in the treatment of obesity. Two pilot studies enrolled healthy subjects with body mass indexes2540 kg/m2 to similar 8-week weight loss programs. Safety was assessed by physical examination and laboratory tests atscreening and 8 weeks. The first pilot study randomized eight subjects to citrus aurantium (herbal phenylephrine) or placebo.Body composition by DEXA scan, waist circumference, and resting metabolic rate (RMR) were measured at baseline and 8weeks. Food intake and appetite ratings were measured at baseline and week 2. The second pilot study randomized 20 sub-jects to two 2-hour RMR tests a week apart after phenylephrine (20 mg) or placebo followed by phenylephrine (20 mg) threetimes a day for 8 weeks. In the first pilot study, the citrus aurantium group gained 1.13. 0.27 (mean. SEM) kg comparedwith 0.09. 0.28 kg in the placebo group (P. .04). RMR at baseline rose more in the citrus aurantium group, 144.5. 15.7kcal/24 hours, than the placebo group, 23.8. 28.3 kcal/24 hours (P. .002), but not at 8 weeks. DEXA, waist circumfer-ence, food intake, and hunger ratings were not different. In the second pilot study, the phenylephrine group lost 0.8. 3.4 kgin 8 weeks (not significant), and RMR increased more in the phenylephrine group (111.5. 32.6 vs. 37.4. 22.7 kcal/24hours, P. .02). There were no significant safety issues in either study. Although no toxicity was seen, these pilot studiessuggest phenylephrine is not efficacious for weight loss.

What does not kill it does not always make it stronger: High temperatures in pyriproxyfen treatments produce Aedes aegypti adults with reduced longevity and smaller females

Moura Lidia,de Nadai Barbara Lepretti,Corbi Juliano J. 한국응용곤충학회 2020 Journal of Asia-Pacific Entomology Vol.23 No.2

Aedes aegypti control in Brazil comprises integrated actions, in which larvicide application is a supplementary measure. Despite the importance of analyzing the effects of temperature on the efficiency of larvicides to control mosquito populations, there is still a lack of information regarding the sublethal effect of larvicides. We hypothesized that mosquitoes which survived pyriproxyfen exposure, during their immature development, have small body sizes and live less than mosquitoes that were not exposed to this larvicide. We investigated the sublethal effects of five different pyriproxyfen concentrations (0.0001; 0.001; 0.01; 0.1 and 1 mg.L −1 ), under three different temperatures (20, 25 and 30 °C). As we increased the larvicide concentration, less larvae survived and developed into adults. However, at 30 °C the survival was higher than at 25 °C and 20 °C comparing the concentrations of 0.001 mg.L −1 and 0.01 mg.L −1 (10% and 16% high, respectively). Mosquito survivors to pyriproxyfen exposure, in all thermal conditions, had shorter adult life spans than mosquitoes not exposed to pyriproxyfen during the larval stage. The females exposed at 30 °C showed smaller wings than females from experiments at 20 °C. These findings provide evidence that the biological parameters of the adult lifespan and wing centroid size are impaired due to larval exposure to pyriproxyfen, even at high temperatures. Reduced longevity and small wing size are fitness costs to survive this larvicide exposure. These findings provide support to assess resistance development to larvicides through future generations and contribute to the discussion on improving the rational application of larvicides.

DNA Restriction Fragment Length Polymorphisms of Nectria haematococca

Kim, Hong Gi,Kistler, H. Corby 충남대학교 생물공학연구소 1993 생물공학연구지 Vol.3 No.-

Nectria haematococca의 다양한 계통간에 DNA의 restriction fragment length polymorphism(RELP)을 구명하고자 T-2계통 균주에서 임의 선발된 genomic clone을 이용하였다. 이들 genomic clone으로 DNA의 single copy와 repetitive sequence내에 polymorphism이 있음이 확인되었다. N.haematococca 6교배군에 repetitive DNA sequence를 나타내는 clone이 발견되었다. Clone pT2-62에 의해 발견된 repetitive sequence는 T-2 균주에서 11개의 HindⅢ restriction fragment와 교잡(hybridization) 되었으나, 6-36 균주에는 전혀 교잡되지 않았다. 공시된 12개 clone 중 6개는 보다 원연종인 Fusarium oxysporum과 F.sambucinum의 DNA와 교잡하지 않았다. 이 연구결과는 병원성 관여 유전자의 연구에 이용하기 위해 Nectria 게놈의 RFLP 지도작성 가능성을 시사해 주고 있다. Random genomic clones fo Nectria haematococca strain T-2 were used to detect DNA restriction fragment length polymorphisms (RFLPs) within various strains of the fungus. RFLPs in both single copy and repetitive DNA sequences were detected by genomic clones. Repetitive DNA sequences were identified in the mating population VI of N.haematococca. A repetitive sequence detected by clone pT2-62 hybridized to 11 HindⅢ restriction fragments in strain T-2 but no fragments in strain 6-36. Six of the twelve clones examined failed to hybridize to total DNA from strains of Fusarium axysporum and F. sambucinum. This study demonstrates the feasibility of constructiong a RFLP-based map of the Nectria genome for use in the mapbased cloning of characteristics involved in plant pathogenesis.

The Safety and Efficacy of a Dietary Herbal Supplement and Gallic Acid for Weight Loss

Frank L. Greenway,Andrew T. Roberts,Corby K. Martin,Zhijun Liu,Ronald J. Amen,Eugene A. Woltering,Jennifer C. Rood,Mary K. Caruso,Ying Yu,Hui Xie 한국식품영양과학회 2007 Journal of medicinal food Vol.10 No.1

The objective of this study was to test the safety and efficacy of NT, a dietary herbal supplement made fromrhubarb, ginger, astragulus, red sage, and turmeric, combined with gallic acid (GA) to reduce food intake and cause weightloss. A total of 105 healthy subjects, 1860 years old with a body mass index of 2535 kg/m2 and on no chronic medication,were randomized to a 300 mg/1.2 g NT-GA combination, a 600 mg/2.4 g NT-GA combination, or placebo in three divideddoses daily for 24 weeks. Food intake was measured at baseline and 2 weeks, and safety parameters were followed regularly.Pharmacokinetic studies of a 200 mg/800 mg NT-GA combination and 800 g GA alone were performed with and withoutfood. There was no dose-related weight loss or reduction in food intake at the 8-week analysis, and the study was terminatedearly. Pharmacokinetic studies showed plasma levels of GA did not increase above 10 .M and were not dose-related. TheNT-GA at all concentrations was well tolerated, but was ineffective in causing weight loss or in suppressing food intake. Phar-macokinetics suggested that GA plasma levels were limited by oral absorption, and may be the reason for lack of efficacy.

Better eggs today than psocids tomorrow: Aedes aegypti (Diptera: Culicidae) eggs exposed to Liposcelis sp. (Psocodea: Liposcelididae) has reduced hatching rates

Moura Lidia,de Nadai Barbara Lepretti,Oyamaguti Maria Eduarda Yumi,Corbi Juliano J. 한국응용곤충학회 2021 Journal of Asia-Pacific Entomology Vol.24 No.4

For different research purposes, there is a need to mass rear mosquitoes, such as Aedes aegypti, under laboratory conditions. The rearing process begins with egg production followed by egg storage in a dry environment, inside containers. Stored eggs are susceptible to environmental threats when storage conditions are suboptimal. Some terrestrial insects can invade this environment and attack stored eggs. In this brief report, we assessed whether Ae. aegypti eggs exposed to Liposcelis sp. individuals had reduced hatching and immature development rates. We exposed 100 eggs in different treatment conditions (fixed in porous paper and loosed) to 30 Liposcelis sp. in dividuals for ten days and then we induced hatching. We observed a hatching rate of 99% reduced for those eggs adhered to porous paper and loosed eggs showed a hatching rate of 45% decreased for those eggs exposed to Liposcelis sp. The remaining larvae took longer to develop into pupae as well, showing a four-day delay on average to the final metamorphosis of the aquatic stage. These results reinforce the need to frequently monitor egg storage conditions to maintain laboratory colonies stable and free from pests that can interfere with mosquito life-history traits.