A Time-Varying Gain Super-Twisting Algorithm to Drive a SPIM

Zaidi, Noureddaher,Jemli, Mohamed,Azza, Hechmi Ben,Boussak, Mohamed The Korean Institute of Power Electronics 2013 JOURNAL OF POWER ELECTRONICS Vol.13 No.6

To acquire a performed and practical solution that is free from chattering, this study proposes the use of an adaptive super-twisting algorithm to drive a single-phase induction motor. Partial feedback linearization is applied before using a super-twisting algorithm to control the speed and stator currents. The load torque is considered an unknown but bounded disturbance. Therefore, a time-varying switching gain that does not require prior knowledge of the disturbance boundary is proposed. A simple sliding surface is formulated as the difference between the real and desired trajectories obtained from the indirect rotor flux oriented control strategy. To illustrate the effectiveness of the proposed control structure, an experimental setup around a digital signal processor (dS1104) is developed and several tests are performed.

A Time-Varying Gain Super-Twisting Algorithm to Drive a SPIM

Noureddaher Zaidi,Mohamed Jemli,Hechmi Ben Azza,Mohamed Boussak 전력전자학회 2013 JOURNAL OF POWER ELECTRONICS Vol.13 No.6

To acquire a performed and practical solution that is free from chattering, this study proposes the use of an adaptive super-twisting algorithm to drive a single-phase induction motor. Partial feedback linearization is applied before using a super-twisting algorithm to control the speed and stator currents. The load torque is considered an unknown but bounded disturbance. Therefore, a time-varying switching gain that does not require prior knowledge of the disturbance boundary is proposed. A simple sliding surface is formulated as the difference between the real and desired trajectories obtained from the indirect rotor flux oriented control strategy. To illustrate the effectiveness of the proposed control structure, an experimental setup around a digital signal processor (dS1104) is developed and several tests are performed.

Essential Oil Composition and Antibacterial Activity of Origanum vulgare subsp. glandulosum Desf. at Different Phenological Stages

Afef Be´jaoui,He´dia Chaabane,Maroua Jemli,Abdennacer Boulila,Mohamed Boussaid 한국식품영양과학회 2013 Journal of medicinal food Vol.16 No.12

Variation in the quantity and quality of the essential oil (EO) of wild population of Origanum vulgare at different phenological stages, including vegetative, late vegetative, and flowering set, is reported. The oils of air-dried samples were obtained by hydrodistillation. The yield of oils (w/w%) at different stages were in the order of late vegetative (2.0%), early vegetative (1.7%), and flowering (0.6%) set. The oils were analyzed by gas chromatography (GC) and GC–mass spectrometry (GC-MS). In total, 36, 33, and 16 components were identified and quantified in vegetative, late vegetative, and flowering set, representing 94.47%, 95.91%, and 99.62% of the oil, respectively. Carvacrol was the major compound in all samples. The ranges of major constituents were as follows: carvacrol (61.08–83.37%), p-cymene (3.02– 9.87%), and c-terpinene (4.13–6.34%). Antibacterial activity of the oils was tested against three Gram-positive and two Gram-negative bacteria by the disc diffusion method and determining their diameter of inhibition and the minimum inhibitory concentration (MIC) values. The inhibition zones and MIC values for bacterial strains, which were sensitive to the EO of O. vulgare subsp. glandulosum, were in the range of 9–36mm and 125–600 lg/mL, respectively. The oils of various phenological stages showed high activity against all tested bacteria, of which Bacillus subtilis was the most sensitive and resistant strain, respectively. Thus, they represent an inexpensive source of natural antibacterial substances that exhibited potential for use in pathogenic systems.

Modulatory effect of Syzygium aromaticum and Pelargonium graveolens on oxidative and sodium nitroprusside stress and inflammation

Ilias Marmouzi,El Mostafa Karym,Rachid Alami,Meryem El Jemli,Mourad Kharbach,Fouzia Mamouch,Aisha Attar,Bouchra Faridi,Yahia Cherrah,My El Abbes Faouzi 경희대학교 융합한의과학연구소 2019 Oriental Pharmacy and Experimental Medicine Vol.19 No.2

Therapy combination is known for less side effects and higher efficacy. Essential oils (EOs) and mixture from two wellknown plants (Syzygium aromaticum and Pelargonium graveolens) were tested for in vivo antioxidant and anti-inflammatory activities. The chemical analysis of the investigated Oils has lead to the identification of Eugenol (74.06%), Caryophyllene (11.52%) and Carvacrol acetate (7.82%) as the major element in S. aromaticum; while P. graveolens was much higher in Citronellol (30.77%), 10-epi-γ-Eudesmol (22.59%), and Geraniol (13.95%). In our pharmacological screening, both EOs demonstrated good antioxidant effects; especially S. aromaticum activity was much higher. In contrast, the in vivo investigation of the antioxidant activity using antioxidant enzymes (MDA, SOD and CAT) in the protozoa model (Tetrahemena pyriformis) demonstrated a higher protective effect of P. graveolens and EOs mixture. On the other hand, EOs demonstrated anti-inflammatory effect on the two phases of inflammation in the carrageenan induced edema model. Results from this study indicate that EOs from S. aromaticum and P. Graveolens can be used as a multitarget therapy.

Usage of agricultural DAP-fertilizer and Eucalyptus essential oils as potential attractants against the mediterranean fruit fly Ceratitis capitata (Tephritidae)

Sadraoui-Ajmi Insaf,Benali Nejib,Soltani Abir,Chaib Samira,Limem Essia,Jallouli Slim,Boushih Emna,Fajraoui Abdallah,Mediouni-Ben Jemâa Jouda 한국응용곤충학회 2022 Journal of Asia-Pacific Entomology Vol.25 No.1

In Tunisia, oasis ecosystem is characterized by fragility due to the abusive application of insecticides and fer tilizers. Moreover, in oasis Ceratitis capitata is a major pest. Its control relied on synthetic pesticides. This work aims to assess the efficiency of the two formulations based on the combination of DAP and Eucalyptus essential oils. X-Ray Diffraction and Brunauer-Emmett-Teller surface area were used to characterize DAP fertilizer. GC–MS analysis were performed for analyze oils composition and adsorption of oil compounds. Kinetics adsorption/ desorption was determined by measuring the mass of solid samples over time. Repellent/attractant and contact toxicity tests of Eucalyptus cinerea and E. maidenii oils and their formulations were evaluated against Medfly adults. GC–MS analysis indicated that 1,8-cineole was the dominant major common compound (E. cinerea: 74.58%, E. maidenii 66.70%). Moreover, the adsorption efficacy depends on the abundance of each compound in crude essential oils and the polarity of terpenic components. Indeed, percentage of 1,8-cineole adsorption in the formulation was 76.15%for E. cinerea and 65.24% for E. maidenii. Results indicated the attractant potential of both essential oils (class III) and that DAP/essential oils formulations accomplished better attractant performance (class IV). Besides, formulations were toxic towards C. capitata adults (80% and 100% mortality for E. cinerea and E. maidenii). Results pointed out that the commercial lure Ceratrap®, traps baited with DAP/E. maidenii and DAP/E. cinerea formulations were attractant against C. capitata adults under field conditions. This work supports the use of essential oils and fertilizers-based formulations as an innovative tool for the management of Medfly.

Screening for insecticidal potential and acetylcholinesterase activity inhibition of Urginea maritima bulbs extract for the control of Sitophilus oryzae (L.)

Asma Mami Maazoun,Takoua Ben Hlel,Soumaya Haouel Hamdi,Feten Belhadj,Jouda Mediouni Ben Jemâa,Mohamed Nejib Marzouki 한국응용곤충학회 2017 Journal of Asia-Pacific Entomology Vol.20 No.3

Interest in botanical insecticides derived from plants has increased as a result of environmental concerns and insect resistance to chemical insecticides. In this study, we explored the insecticidal activity of Urginea maritima bulbs extract and its inhibitory effect on acetylcholinesterase enzyme system in the rice weevil Sitophilus oryzae (L.) (Coleoptera: Curculionidae). Phytochemical screening and HPLC-ESI/TOF-MS analysis revealed the presence of bioactive molecules with high insecticidal potential. Content of polyphenols (130.88 ± 0.44 mg GAE/g FW), flavonoids (50.81 ± 0.25 mg RE/g FW) as well as alkaloids (12.09 ± 0.16 mg AE/g FW) were high. HPLCESI/ TOF-MS analysis results demonstrated that ferulic acid (124.19 μg/g FW), vanillic acid (75.84 μg/g FW) and 4-hydroxybenzoic acid (59.73 μg/g FW) were the major phenolic compounds of U. maritima bulbs extract. The toxic potential against the rice weevil using contact and repellent bioassays showed the highest insecticidal potential of U. maritima bulbs extract. The LD50, LC50 and RC50 values were 19.03 μg/insect, 2.35 μg/cm2 and 0.009 μg/cm2 for contact bioassay by topical application, contact bioassay by treated filter paper method and repellent bioassay, respectively. Furthermore, U. maritima bulbs extract inhibited acetylcholinesterase (AChE) activity and median inhibition concentration IC50 was evaluated to 66.08 μg/ml. The findings of the present investigation confirmed that Urginea maritima may be recommended as an eco-friendly alternative to synthetic insecticides.

Parasitoids of chickpea leafminer Liriomyza cicerina (Diptera: Agromyzidae) and their parasitism rate on chickpea fields in North Tunisia

Abir Soltani,Ahmet Beyareslan,Lütfiye Gençer,Soumaya Haouel Hamdi,Arbia Bousselmi,Moez Amri,Jouda Mediouni Ben Jemâa 한국응용곤충학회 2018 Journal of Asia-Pacific Entomology Vol.21 No.4

In recent years, as a consequence of climatic changes, the leafminer Liriomyza cicerina had emerged as a serious pest in chickpea crops causing considerable damage in Tunisia. Thus, the search of control methods is necessary. The aim of this research was to monitor and identify the naturally occurring parasitoids of the chickpea leafminer Liriomyza cicerina in insecticide-free chickpea-growing areas located in North-Western Tunisia. Chickpea leaves with mines were weekly sampled from Beja and Kef sites during 2016 and 2017 and kept to observe and count emerging leafminer and parasitoid adults in the laboratory. Results revealed that L. cicerina parasitoids complex species included three hymenopteran parasitoids namely Opius monilicornis (Fisher, 1962) (Braconidae); Diglyphus isaea (Walker, 1838) (Eulophidae) and Diaulinopsis arenaria (Erdös, 1951) (Eulophidae). These parasitoids were identified and recorded for the first time in Tunisia on L. cicerina with parasitism rate varied between 13% and 52.5%. The most common species was O. monilicornis. The correlation between infestation rate on chickpea plants and number of emerged three parasitoids was calculated revealing high significant and positive correlations. The diversity index (H′) was also calculated. The three parasitoids were found in two sites Beja and Kef; while the diversity differed during the developmental stage of chickpea crops.

Nutritional alterations and damages to stored chickpea in relation with the pest status of Callosobruchus maculatus (Chrysomelidae)

Soumaya Haouel Hamdi,Sourour Abidi,Dorra Sfayhi,Mohamed Zied Dhraief,Moez Amri,Emna Boushih,Mariam Hedjal-Chebheb,Khouja Mouhamed Larbig,Jouda Mediouni Ben Jemâa 한국응용곤충학회 2017 Journal of Asia-Pacific Entomology Vol.20 No.4

The identification of substitute products for the replacement of wheat flours for paste and bread is a strategy which may help to overcome the wheat yield problems and to meet the huge consumption rates in Tunisia. In this respect, chickpea flour can provide good opportunities. Nevertheless, seed beetles were the major constraints to achieve this goal. This paper presents extensive data on the pest status of Callosobruchus maculatus infesting chickpea in relation to its damage on chickpea seeds and flour. Data on population dynamics, growth and demographic parameters, economic injury level (EIL) and impact on functional and physical properties under two food supply conditions were studied. Results revealed that C. maculatus is a major pest altering nutritional properties of stored chickpea. Our results showed that the food supplies influence the reproductive behavior and demographic traits of C. maculatus leading to significant impacts on seed germination, weight loss and functional and physical properties. Under food optimal conditions, fertility rates were 38.1 and 47.2% respectively for Amdoun 1 and Beja 1. Moreover, the intrinsic rate of increase r and the finite rate of increase λ reached, respectively, 0.057 and 1.06 ♀/♀/days for Amdoun 1 and 0.048 and 1.05 ♀/♀/days for Beja 1. On the other hand, results showed that germination reduction depended on C. maculatus infestation level. Moreover, this work pointed out the variability of EILs with host varieties. Results also revealed that C. maculatus seed infestation led to nutritional changes in the seeds. The proximate seed composition was significantly influenced by variety and seeds category. Increases in percentages of protein (33.05 and 22.53% for 53 Amdoun 1), moisture (10.80 and 10.67% for Amdoun 1) and ash have been observed in infested seeds; decreases were observed in percentages of crude fat, carbohydrates (47.96 and 58.69% for Amdoun 1) and nutritional values (355.90 and 367.51 kcal for Amdoun 1) for the same infested seeds.

Relationship of Liver Stiffness and Controlled Attenuation Parameter Measured by Transient Elastography with Diabetes Mellitus in Patients with Chronic Liver Disease

Jem Ma Ahn,백용한,김소현,이준희,조주연,손원,곽금연,최문석,이준혁,고광철,백승운,유병철 대한의학회 2014 Journal of Korean medical science Vol.29 No.8

High prevalence of diabetes mellitus in patients with liver cirrhosis has been reported inmany studies. The aim of our study was to evaluate the relationship of hepatic fibrosis andsteatosis assessed by transient elastography with diabetes in patients with chronic liverdisease. The study population consisted of 979 chronic liver disease patients. Liver fibrosisand steatosis were assessed by liver stiffness measurement (LSM) and controlledattenuation parameter (CAP) on transient elastography. Diabetes was diagnosed in 165(16.9%) of 979 patients. The prevalence of diabetes had significant difference among theetiologies of chronic liver disease. Higher degrees of liver fibrosis and steatosis, assessed byLSM and CAP score, showed higher prevalence of diabetes (F0/1 [14%], F2/3 [18%], F4[31%], P < 0.001; S0/1 [15%], S2 [17%], S3 [26%], P = 0.021). Multivariate analysisshowed that the independent predictive risk factors for diabetes were hypertension (OR,1.98; P = 0.001), LSM F4 (OR, 1.86; P = 0.010), male gender (OR, 1.60; P = 0.027), andage > 50 yr (OR, 1.52; P = 0.046). The degree of hepatic fibrosis but not steatosis assessedby transient elastography has significant relationship with the prevalence of diabetes inpatients with chronic liver disease.

Acute hepatitis A; Cytotoxic T lymphocyte-associated antigen 4; Programmed death 1

Jem Ma Ahn,Yong Han Paik,Sin Yeong Min,Ju Yeon Cho,Won Sohn,Dong Hyun Sinn,Geum-Youn Gwak,Moon Seok Choi,Joon Hyeok Lee,Kwang Cheol Koh,Seung Woon Paik,Byung Chul Yoo 거트앤리버 소화기연관학회협의회 2016 Gut and Liver Vol.10 No.2

Background/Aims: The aim of this study was to evaluate the relationship between controlled attenuation parameter (CAP) and hepatic steatosis, as assessed by ultrasound (US) in patients with alcoholic liver disease (ALD) or non-alcoholic fatty liver disease (NAFLD). Methods: Patients with either ALD or NAFLD who were diagnosed with fatty liver with US and whose CAP scores were measured, were retrospectively enrolled in this study. The degree of hepatic steatosis assessed by US was categorized into mild (S1), moderate (S2), and severe (S3). Results: A total of 186 patients were included: 106 with NAFLD and 80 with ALD. Regarding hepatic steatosis, the CAP score was significantly correlated with US (ρ=0.580, p<0.001), and there was no significant difference between the NAFLD and ALD groups (ρ=0.569, p<0.001; ρ=0.519, p<0.001; p=0.635). Using CAP, area under receiver operating characteristic curves for ≥S2 and ≥S3 steatosis were excellent (0.789 and 0.843, respectively). For sensitivity ≥90%, CAP cutoffs for the detection of ≥S2 and ≥S3 steastosis were separated with a gap of approximately 35 dB/m in all patients and in each of the NAFLD and ALD groups. Conclusions: The CAP score is well correlated with hepatic steatosis, as assessed by US, in both ALD and NAFLD.