297 results on '"H. Taheri"'
Search Results
2. Effect of Water Stress on some Morphological and Physiological Characteristics of Citrus Natural Genotypes Seedling
- Author
-
R. Fifaei, H. Taheri, Y. Tajvar, and E. Gholamian
- Subjects
citrus natural genotypes ,drought tolerant ,ion leackage ,water stress ,Agriculture (General) ,S1-972 - Abstract
Background and Objectives Water is a main factor in agriculture activities and almost 70 percent of world water resources are consumed in agriculture. Drought consist the most important environmental restriction to plant growth and production. Drought stress is known to change a range of physiological processes such as photosynthesis, stomatal conductance and transpiration rate. Citrus are one of sub-tropical and tropical fruits and the most important horticultural products in the world that tolerate low temperature and weak drainage but as regards Citrus growing in sub-tropical and tropical regions that often expose drought. Drought is one the environment stress factors that is caused changes in plants morphological and physiological characteristics. Study of survival time in the three citrus rootstocks in sever stress circumstances showed that this time in rootstocks poncirus, cleopatra mandarine and former-alkaeid 5 were 11, 13 , 20 days, respectively while survival time in valencia on the rootstocks was 21, 26 and 29 days, respectively. This study was performed in order to study drought tolerant in natural genotypes with the poncirus and rough lemon. And so, morphological and physiological characteristics were investigated in this genotypes. Materials and Methods This research was performed in separately two tests in Citrus and subtropical fruits research center on 2016. In the first test, survival time and total transpiration and in the second test, organs fresh and dry weight, ion leackage and leaf relative water content were assessed in factorial experiment based on randomized completely design in nucellar seedlings of 8 Citrus natural genotypes (G10, G11, G12, G16, G18, G22, G23, G25) poncirus and rough lemon under glasshouse conditions (with temperature 26-28 degree centigrade in day and 20-22 degree centigrade in night and 80-85 percent relative humidity). Factors were 10 Citrus genotypes and two treatment of irrigation (optimum irrigation and withholding irrigation for six weeks) in the second test and 10 Citrus genotypes in the first test. In this study, medium weight moisture is calculated and due to the soil moisture characteristics curve was obtained medium matric potential. The matric potential rate was in control -0.03 megapascal and in sever stresss -1.5 megapascal. Organs fresh and dry weight were measured on digital balance with accuracy 0.01 gr. (model GM 6101, Germany). S amples were dried in oven (70 degree centigrade and for 48 hours). RWC is measured by using of fresh weight, dry weight and turgid weight in this formula: RWC= [(FW-DW) / (TW-DW)] × 100. Ion leackage was determined by use of 4 equal leaf segments and measuring of primary and secondary ion leackage in this fomula: EL (%) = (EL1/EL2) × 100. The first research was included of 10 treatment, six replication and one seedling in every plot and the second research was included of 20 treatment, three replication and two seedlings in every plot. SAS software (ver. 9.1) and Duncan test were used to variance analysis and mean comparison. Excel software was used to graphs drawing. Results The results showed that in first test, poncirus (with 125 days) and G11 (with 78 days) have longer survival time and are more tolerant and so rough lemon (with 38 days) and G12 (with 44 days) were more susceptible. Others were intermediate. Slowest of water consumption time in poncirus and the most quick in rough lemon, and so maximum of total transpiration in G25 and minimum in poncirus was observed. In second test, decrease maximum of leaf, shoot and total fresh weight in G22 (arranged by 0.37, 0.47 and 0.42) and decrease minimum in G11 (arranged by 0.48, 0.54 and 0.52), decrease maximum of root fresh weight in G22 (with 0.35 fold) and decrease minimum in G18 (with 0.52 fold), decrease maximum of root/shoot fresh weight in G18 (with 0.61 fold) and decrease minimum in G23 (with 0.65 fold) and increase maximum of root/shoot dry weight in G16 (with 1.56 fold) and increase minimum in poncirus (with 1.3 fold) was observed in compared with control. In stress, G18 (with 32.32 percent) and G12 (with 34.37 percent) had leaf relative water content minimum in compared with control. G12 (with 78.59 percent) and G18 (with 73.16 percent) had maximum and poncirus (with 31.85 percent) minimum ion leackage percent in compared with control. Therefore, rough lemon, G12 and G18 as susceptible and poncirus and G11 as tolerant to drought were introduced. Discussion In stress conditions, poncirus has longer survival time, slower water consumption time, minimum total transpiration and minimum ion leackage percent and is most tolerant. Rough lemon has shower survival time, more rapid water consumption time and is most susceptible. Other genotypes locate in after grades. Therefore poncirus and rough lemon can be used as rulers in tests of drought study.
- Published
- 2022
- Full Text
- View/download PDF
3. Digital culture and visual studies: Nostalgia and dreaming after COVID-19 event in Iran
- Author
-
H. Taheri Kia
- Subjects
covid-19 ,event ,digital geography ,nostalgia ,quarantine ,instagram ,Social sciences (General) ,H1-99 - Abstract
The event of the epidemic of Covid-19 had a massive shock to the borders of the order of Iranian everyday life. The emergence of death and disease from the Covid-19 put Iran in an exception state. Universities and schools were shut down and people went to lockdown. Also, the event of the epidemic of Covid-19 led to other events such as quarantine and it caused economic, mental, and family crises. The crucial event of the epidemic of Covid-19 was coincident with the traditional ceremony of Iranian New Year accompanied by shopping, traveling, and visiting families. But all of them were destroyed. By shutting down the city and the necessity of not coming together, digital geography was the most important space for retrieval of relationships and people could share their emotions of fear and anxiety and they make an emotional connection. Thus, one of the most important emotions which were shared in virtual social networks included nostalgia about the time before the epidemic of Covid-19 in Iran and dreaming the coming future. Then by applying a multidisciplinary approach through digital cultural studies and visual studies, the main object of the article is to analyze how emotions of nostalgia and dreaming of Iranian people were expressed on Instagram and Facebook. Consequently, remembering the city as a lost secure home and thinking of a vague future as dreaming indicates of getting stuck in the present time of the field of the event.
- Published
- 2020
- Full Text
- View/download PDF
4. The Problem of Fearing the Political Situation at University
- Author
-
H. Taheri Kia
- Subjects
fear ,political subjectivity ,university ,student ,political state ,History of scholarship and learning. The humanities ,AZ20-999 ,Social sciences (General) ,H1-99 - Abstract
This article studies the experience of fear of confronting the political state at the Iranian university. From the early days of establishing the university in Iran, Iranian university has been engaging in the politics and triggering political movement. In other words, student political movement, in Iranian contemporary political history, is a key term. Hence, the previous researches, in this field, just consider the historical approach, and then there is a lack of deep and qualitative examination which analyzes the current features of the political state at the university. Thus, in this article, analyzing the political state connects to the recent Iranian political approaches and its changes. Our study is after the green movement of 2008 and security encounters with students. Therefore, for students, based on those days and experiences, involving in political state is with fear and frustration. For examining this, we studied the University of Poly Techniques, Faculty of Social science at Allameh Tabataba'i University and Faculty of Medical Science at Tehran University. We conducted deep interview with 50 of political and non-political students. The object of the article is to answer how the fear of the political state at the university, for students, does make sense? And, how political student activists have encountered the fear? Consequently, students’ families are the basic factor to produce fear of the political situations, for the historical facts proves the political actions at the university threaten students’ future opportunity to get a job and even continue studies. Besides, in the everyday life at university, students alert each other to the adventures of the political engagements. But, when we talk about political state, mostly, it is about radical and reformist approaches and not those conservative practices which are supported by hardliners. Also, those political students who passed the gate of fear to the political sphere and doing political actions are like a catalyzer to persuade and stimulate other students to pass from the gate of fear.
- Published
- 2019
- Full Text
- View/download PDF
5. Four days of life university after Islamic revolution: From April 19 to April 22, 1980
- Author
-
M. Rezaie, A. Kazemi, and H. Taheri Kia
- Subjects
cultural revolution ,student ,university ,empty space ,historical conjunction ,History of scholarship and learning. The humanities ,AZ20-999 ,Social sciences (General) ,H1-99 - Abstract
After 1979 Islamic revolution, from April 20 to 22, 1980 universities in Tehran, Tabriz and some other cities, experienced an outstanding political juncture. Active collegiate political groups were compelled to surrender their rooms and offices, and leave the universities’ campus. Accordingly, universities and cities were the scene of bloody clashes. As a matter of fact, university as the fortress of freedom, resistance and revolution against Pahlavi was about to change its revolutionary identity and to adapt new role of an engaged proponent of Islamic regime. Concerning to Badiou’s concept of empty space and Delousian Rhizomatic analysis, we study related news and pictures of related newspapers. Concludingly, we demonstrate the set of relations in which Islamic university renovates. Also, we illustrate how the universities, on the one hand, acted as an agent and a mechanism for de-centering the revolutionary characteristic, and remaining this “Holy Place”, in Ayatollah Khomeini’s word, as a permanent Islamic partisan of new born political regime, simultanouly.
- Published
- 2017
- Full Text
- View/download PDF
6. Long-term Effects of Different Irrigation Methods with Treated Wastewater on Soil Chemical Properties
- Author
-
P. Najafi, S.H. Tabatabaei, and H. Taheri-Sodejani
- Subjects
Industrial wastewater ,Irrigation methods ,Soil chemical properties ,Urban wastewater ,Agriculture (General) ,S1-972 ,Irrigation engineering. Reclamation of wasteland. Drainage ,TC801-978 - Abstract
Introduction: Reuse of wastewater for agricultural irrigation is increasing due to an increased demand for water resources in different parts of the world. Almost 70% of deviated water from rivers and pumped groundwater is used for agriculture. If wastewater is used for irrigation in agriculture, then the amount of discharged water from natural sources will be decreased and the flow of wastewater to the environment and its ensuing pollution will be prevented. Using wastewater in applications such as irrigation of agricultural lands has caused an increase of some exchangeable ions, salts and suspended solids (organic and mineral) in the soil and has significantly affected physical, chemical and biological features. Therefore, paying attention to the soil health is important during use of wastewater when it is the source of irrigation water. In such cases, there will be some worries about pollution of harvested products, contact of farm workers with pathogenes and environmental issues in the farm. In these conditions, attention to irrigation methods along with consideration of environmental protection standards is important. Materials and Methods: In this study, the effects of treated wastewater (TW) irrigation were tested on some chemical properties of soil for three years under five different irrigation treatments. The treatments were as follows: surface furrow irrigation (FI), surface drip irrigation (SDI), subsurface drip irrigation in 30 cm depth (SDI30), subsurface drip irrigation in 60 cm depth (SDI60) and bubbler irrigation (BI). At the end of the experiment, soil samples were collected from a depth of 0-30, 30-60 and 60-90 cm in order to measure the electrical conductivity (EC), pH, sodium adsorption ratio (SAR), organic matter (OM) and calcium carbonate equivalent (CaCO3). Results and Discussion: According to the results of soil analysis, the soil became more saline than the beginning by applying the treatments. Generally, in two plots of urban and industrial wastewater, the least salinity was observed in SDI (19.0% increase in salinity) and the maximum value of these parameters was observed in BI (99.7% increase in salinity). The results showed that average SAR in soil saturation extract of three layers were 5.5 and 6.6 dS m-1, respectively for urban and industrial plots. Considering these values along with EC, the soil will be categoraized as normal soil in terms of salinity and alkalinity. An increase of 14.3 % in BI and 8.2% in SID30 were observed in comparison with the initial values of the period. These were the extremums for SAR. The results also showed that the application of TW caused a 38.75 % reduction in SAR for the 30-60 cm. Soil pH of the plots under study was decreased significantly and reached its acceptable limit in the soil during the experiment. On the average, the pH of soil layer has been 7.4 and 7.3 for urban and industrial plots, respectively. The results showed that soil organic matter was influenced by the irrigation method and this was more pronounced in the location of wastewater injection. In the soil surface, the highest amount of organic matter was observed in treatment FI and SDI. However, in a depth of 30-60 and 60-90, SDI30 and SDI60 revealed the highest amount of organic matter content. The average concentration of chloride (Cl-) ions in industrial wastewater (12.3 meq L-1) was more than that of urban wastewater (7.3 meq L-1). Therefore, the effect of industrial wastewater on increasing soil Cl- has been more pronounced than that of urban wastewater. Soil Cl- was increased at the location of wastewater injection and the highest amount of Cl- in the irrigation treatments was observed in BI. The results also showed that the application of TW caused a 23.4% reduction in soil CaCO3 content at a depth of 60-90 cm. The lowest amount of CaCO3 was recorded in treatment SDI60. There was no significant difference between the average of irrigation treatments in the urban plots. But in the last layer, it showed that SDI30 had a significant difference with both SDI and SDI60, in the industrial plots. Conclusion: Generally, SDI irrigation in the root zone depth (in this study was up to 60 cm) is recommended for protecting safe environmental conditions, supplying water demand in the root zone and improving soil quality. Keywords: Industrial wastewater, Irrigation methods, Soil chemical properties, Urban wastewater
- Published
- 2016
- Full Text
- View/download PDF
7. Empirical Modeling of Clarity in the Caspian Sea using MERIS Data
- Author
-
H. Taheri Shahraaini
- Subjects
secchi depth ,clarity model ,meris ,caspian sea ,univariate regression ,Technology ,Astronomy ,QB1-991 - Abstract
In this study, univariate linear regression model was developed for monitoring secchi depth in the Caspian Sea using level 1b and level 2 data. The in-situ measurements were carried outduring 25 one-day campaigns in the Caspian Sea. In this study, 25 level 1b MERIS images were utilized and then converted to level 2 data using C2R processor. The ability of univariate linear regression for the extraction of secchi depth from level 1b and level 2 wasinvestigated. The results demonstrated that the level 2 data lead to better performance than level 1b data. The level 2 data are able to retrieve the secchi depth in the Caspian Sea with correlation coefficient and percent of absolute error about 0.86 and 28.6%, respectively. Finally, secchi depth map of Caspian Sea was retrieved from MERIS level 2 images using developed univariate empirical model.
- Published
- 2014
8. IS IMPAIRED FASTING GLUCOSE ASSOCIATED WITH INCREASED RISK OF CORONARY ATEROSCLEROSIS?
- Author
-
M. Hashemi, H. Taheri, N. Amiri, M. Yavari, I. Shaigannia, L. Moghadas, Z. Talaee, and E. Shirzadi B. Soleimani
- Subjects
Medicine (General) ,R5-920 - Abstract
Impaired fasting glucose identifies individuals at high risk of progression to diabetes but the role of IFG as a coronary artery disease risk factor, independent of its progression to diabetes and its association with other coronary artery disease risk factors ,is unclear. A cross-sectional study was conducted to evaluate the hypothesis that impaired fasting glucose increased the likelihood of atherosclerotic plaque formation. Blood chemistry data as well as traditional coronary artery disease risk factors from 812 patients referred for coronary angiography to heart centers in Shahid- Chamran and Sina hospital, Isfahan, Iran were recorded. The population were stratified into three groups according to American Diabetes Association criteria: normal fasting glucose (n=608), impaired fasting glucose(n=92) and diabetes mellitus(n=112).We use extent, Vessel and stenosis scores to indicate the coronary artery involvement. KrusKal-Wallis test showed that the means of extent, Vessel and stenosis scores are not significantly different between three groups(P> 0.05). Multivariate linear regression analysis, using extent score of coronary artery disease as dependent variable and traditional risk factors and impaired fasting glucose as independent variables did not show any significant difference either. Our data suggested that impaired fasting glucose is not associated with increased risk of coronary atherosclerosis.
- Published
- 2008
9. Biliary Dyskinesia as a Rare Presentation of Metastatic Breast Carcinoma of the Gallbladder: A Case Report
- Author
-
A. Markelov, H. Taheri, K. Vunnamadala, and G. Ibrahim
- Subjects
Pathology ,RB1-214 - Abstract
Background. Breast carcinoma is the most common malignancy in women worldwide. It is most commonly associated with metastases to the liver, lung, bone, and the brain. Invasive lobular carcinoma is a less common pathology with slightly higher metastases to the upper gastrointestinal tract. Invasive lobular carcinoma metastasis to the gallbladder is extremely rare. Method. In this paper we are presenting a case of a 67-year-old female with metastases of invasive lobular breast cancer to the gallbladder six years after her therapy. Conclusion. This case clearly signifies the nature of the micrometastatic foci of the invasive lobular carcinoma even many years after a successful treatment.
- Published
- 2011
- Full Text
- View/download PDF
10. Surface approximations using generalized NURBS.
- Author
-
Alireza H. Taheri and Krishnan Suresh
- Published
- 2022
- Full Text
- View/download PDF
11. Generalizations of non-uniform rational B-splines via decoupling of the weights: theory, software and applications.
- Author
-
Alireza H. Taheri, Saeed Abolghasemi, and Krishnan Suresh
- Published
- 2020
- Full Text
- View/download PDF
12. Heat transfer of fourth-grade fluid flow in the plane duct under an externally applied magnetic field with convection on walls
- Author
-
M. Ebrahimi, S., Javanmard, M., H. Taheri, M., and Barimani, M.
- Published
- 2017
- Full Text
- View/download PDF
13. La stéatose hépatique aiguë gravidique récidivante : à propos d’un cas et une revue de la littérature
- Author
-
Y. Janati-Idrissi, L. Slama, H. Taheri, H. Saadi, and A. Mimouni
- Subjects
Reproductive Medicine ,Obstetrics and Gynecology - Published
- 2022
- Full Text
- View/download PDF
14. AN OVARIAN GRANULOSA CELL TUMOR IN A PATIENT WITH POLYCYSTIC OVARIAN SYNDROME: A CASE REPORT
- Author
-
A. Aouragh , H. Kamal , H. Taheri , H. Saadi and A. Mimouni
- Abstract
Granulosa cell tumors (GCTs) are the second most common ovarian sex cord stromal tumors after fibroma/thecomas, accounting for less than 2% of all ovarian malignancies. GCTs are most common in postmenopausal women between the ages of 50 and 55, are usually diagnosed early, and have a good prognosis. GCTs are typically characterized by hyperestrogenism and have an average size of 10 to 15 cm. A 39-year-old nulligravida with polycystic ovarian syndrome (PCOS) discovered a 50-mm mass in her right ovary on ultrasonography. Pathological examination revealed an adult-type granulosa cell tumor with necrosis and hemorrhage. The tissue was positive for inhibin-, Wilms tumor-1, and CD56 but negative for cytokeratin 7. Finally, we performed a right salpingo-oophorectomy, an endometrial biopsy, a peritoneal biopsy, and a partial omentectomy. Pathology revealed an adult-type granulosa cell tumor. IA stood for International Federation of Gynecology and Obstetrics staging. The patient did not require any additional care. Surprisingly, her normal menstruation returned two weeks later, and she had a normal pregnancy and parturition. Following the surgery, There have been no complications and the patient is disease-free.  
- Published
- 2023
- Full Text
- View/download PDF
15. PRENATAL DIAGNOSIS AND SUCCESSFUL SURGICAL TREATMENT OF GASTROCHISIS: CASE REPORT
- Author
-
A. Ousti , O. Lamzouri , H. Taheri , H. Saadi and A. Mimouni
- Abstract
Due to routine maternal serum screening and fetal ultrasonography, gastrochisis is routinely found in utero, we report a case of gastrochisis diagnosed prenatally, the delivery was made by C-section and the patient was operated at day 1 of life with good outcome The surgical treatment of gastroschisis differs from hospital to hospital and has changed over the years, especially since the spring-loaded silo was invented. Every surgical repair has as its main objective the return of the viscera to the abdominal cavity while reducing the chance that the viscera would sustain harm from direct trauma or increased intra-abdominal pressure.Gatrochisis is remains a rare condition that be closed spontanouesly during the pregnancy and that can prevented by acid folic supplementation.  
- Published
- 2023
- Full Text
- View/download PDF
16. Hydrogen failure sensitivity of A516-Gr70 and API 5L-X70 steels in sour environments
- Author
-
H Taheri, A Dolati, and Behrooz Beidokhti
- Published
- 2015
- Full Text
- View/download PDF
17. Adaptive control with state-dependent modeling of patient impairment for robotic movement therapy.
- Author
-
C. Bower, H. Taheri, and Eric T. Wolbrecht
- Published
- 2013
- Full Text
- View/download PDF
18. Smart Farming: A Review of Animal-Based Measuring Technologies for Broiler Welfare Assessment
- Author
-
S. Azarpajouh, S.L. Weimer, J.A. Calderón Díaz, and H. Taheri
- Subjects
General Veterinary ,General Agricultural and Biological Sciences ,Nature and Landscape Conservation - Abstract
The growing world population has increased the demand for meat production and has led to a rapid growth in the scale of broiler enterprises globally. Poultry producers need to implement several changes in their production systems to supply the increasing demand for poultry products while considering farming sustainability and ensuring high standards of animal welfare. The recent advancement in technology and engineering tools and materials, such as advanced sensors and sensing devices, data processing, and machine learning methods, provides effective tools for the broiler industry to monitor broiler welfare indicators. This review paper will (a) explain smart broiler farming, (b) describe on-farm broiler welfare assessment, and (c) explore on-farm applications of smart technologies that can be used as animal-based welfare assessment tools.
- Published
- 2022
- Full Text
- View/download PDF
19. A Hybrid of the Newton-GMRES and Electromagnetic Meta-Heuristic Methods for Solving Systems of Nonlinear Equations.
- Author
-
Faezeh Toutounian, Jafar Saberi-Nadjafi, and S. H. Taheri
- Published
- 2009
- Full Text
- View/download PDF
20. The use of effective full penetration of T-butt welds in welded moment connections
- Author
-
James B.P. Lim, Michail Karpenko, H. Taheri, Gary M. Raftery, George Charles Clifton, and Pingsha Dong
- Subjects
0209 industrial biotechnology ,Materials science ,business.industry ,Mechanical Engineering ,Butt welding ,Seismic loading ,Fillet weld ,Metals and Alloys ,02 engineering and technology ,Welding ,Structural engineering ,Flange ,020501 mining & metallurgy ,law.invention ,020901 industrial engineering & automation ,0205 materials engineering ,Mechanics of Materials ,law ,Solid mechanics ,Plastic hinge ,business ,Failure mode and effects analysis - Abstract
Full-penetration butt welds are often specified to connect the beam flanges to the column flange in welded moment resisting connections. Partial-penetration butt welds are cheaper than full-penetration butt welds and also more cost effective when compared to large fillet welds. EN 1993-1-8 standard includes a definition of an “effective full penetration of T-butt welds” implying that it can be used to replace butt welds leading to cost savings. This study evaluates the seismic performance of welded beam-to-column connections using effective full penetration of T-butt welds. Three full-scale T-shaped specimens were tested under cyclic loading. The results demonstrate that the effective full-penetration butt welds work very well under seismic loading, forcing the failure mode into the beam and enabling considerable energy to be dissipated within the beam plastic hinge, with no failure in the beam to column welds. Mock-up specimens were fabricated under real workshop conditions to examine the feasibility of reliably fabricating the weld penetration profiles required by EN 1993-1-8. This paper makes recommendations to the use of “equivalent strength” partial-penetration butt welds that can be used by the designer and/or fabricator to replace full-penetration butt welds.
- Published
- 2020
- Full Text
- View/download PDF
21. Breast cancer in women under the age of 35: About 21 cases
- Author
-
A Hmila, H Saadi, H Taheri, and A Mimouni
- Subjects
Oncology ,medicine.medical_specialty ,Breast cancer ,business.industry ,Internal medicine ,Medicine ,business ,medicine.disease - Published
- 2020
- Full Text
- View/download PDF
22. A hybrid of the restarted Arnoldi and electromagnetism meta-heuristic methods for calculating eigenvalues and eigenvectors of a non-symmetric matrix.
- Author
-
S. H. Taheri, H. Ghazvini, Jafar Saberi-Nadjafi, and Jafar Biazar
- Published
- 2007
- Full Text
- View/download PDF
23. [Recurrent acute fatty liver of pregnancy: About a case and a review of the literature]
- Author
-
Y, Janati-Idrissi, L, Slama, H, Taheri, H, Saadi, and A, Mimouni
- Subjects
Adult ,Fatty Liver ,Pregnancy Complications ,Young Adult ,Cesarean Section ,Pregnancy ,Pregnancy Trimester, Third ,Humans ,Female ,Child - Abstract
Acute fatty liver of pregnancy (AFLP) is a specific but rare hepatopathy that can usually complicate the third trimester of pregnancy. It is potentially fatal for the mother and the fetus. To our knowledge, only eight cases of recurrence have been published, we report a new case. The first episode presented by our 23-year-old patient was suspected in front of a cutaneous-mucosal jaundice with vomiting occurring on pregnancy of 35weeks of gestation (WG). Hyperleucytosis, abnormalities of the hepatic balance, as well as a hypoglycemia were biological elements supporting the diagnostic beam. On the other hand, medical imaging could not bring a clear confirmation. The evolution was favorable after deferred delivery by caesarean section for pulmonary maturation. Three years later, she presented to the obstetrical emergency room at 36weeks and six days of gestation, with a clinical and biological picture almost similar to that of the first episode. A caesarean section was then indicated for suspicion of recurrence. The evolution is favorable for the mother and her children. The interest of the communication on the risk of recurrence, the clinical and biological monitoring in particular in the third trimester of the subsequent pregnancy are imperative, in order to improve the prognosis of this pathology.
- Published
- 2021
24. Transcriptional Modulation of Structural and Regulatory Genes Involved in Isoprene Biosynthesis and Their Relevance to Oil Yield and Menthol Content in Peppermint (Mentha piperita L.) upon MeJA and GA3 Treatments
- Author
-
H. Taheri
- Subjects
0106 biological sciences ,0301 basic medicine ,Methyl jasmonate ,Chemistry ,fungi ,Plant Science ,01 natural sciences ,food.food ,WRKY protein domain ,Terpenoid ,03 medical and health sciences ,chemistry.chemical_compound ,030104 developmental biology ,food ,Biochemistry ,Mint family ,MYB ,Menthol ,Trichome differentiation ,010606 plant biology & botany ,Regulator gene - Abstract
Monoterpenes, the major components of the essential oils of the mint family, are synthesized in glandular trichomes. In peppermint (Mentha piperita L.) precursors for the biosynthesis of monoterpenes are provided by plastidial methyl-erythritol-phosphate (MEP) pathways. Knowledge regarding regulatory elements modulating isoprenoid biosynthetic pathway and trichome differentiation is rudimentary in mint plant. In this study, we aimed to find dynamic transcriptional responses of MEP pathway and regulatory genes to methyl jasmonate (MeJA) and gibberellic acid (GA3) in M. piperita by quantitative real time-PCR (qRT-PCR). Moreover, the effects of altered precursor availability on oil composition and yield were evaluated after treatments. Consistent with the up-regulation of most of the MEP pathway genes, induced expression of AP2, WRKY and MYB genes resulted in an increase in oil yield and menthol content, suggesting combinatorial action of the JA-modulated transcription factors (TFs) in elicitation of MEP pathway gene expression. In addition to enhancing expression of some of the MEP pathway genes, GA probably affected trichome formation by induction of a C2H2-type zinc finger protein as a key trichome initiation regulator resulting in a rise in oil and menthol yield. Reduced expression of the C2H2 related TF coincided with the induction of MEP pathway genes, suggesting that the C2H2 TF may act as potential transcriptional repressor in the MEP pathway. Moreover, WRKY may regulate C2H2 and AP2 genes expression to control JA-elicited synthesis of terpenoids in M. piperita. These results provide insights related to the underlying mechanism of transcriptional regulation of terpenoids and trichome formation.
- Published
- 2019
- Full Text
- View/download PDF
25. Polyphasic Taxonomy of Four Passalora-like Taxa Occurring on Fruit and Forest Trees
- Author
-
Rasoul Zare, Mounes Bakhshi, Uwe Braun, and H Taheri
- Subjects
Tilia platyphyllos ,Mycosphaerellaceae ,Biology ,biology.organism_classification ,Agricultural and Biological Sciences (miscellaneous) ,food.food ,Prunus cerasus ,Ulmaceae ,food ,Gleditsia caspica ,Botany ,Leaf spot ,Microsorum ,Gleditsia triacanthos ,Ecology, Evolution, Behavior and Systematics - Abstract
Species of Passalora s. lat. are eminent phytopathogenic fungi that cause generally leaf spot diseases on a broad variety of plants throughout the world. During our investigations exploring cercosporoid fungi associated with leaf spot symptoms of fruit and forest trees in northern and north-western Iran, several passalora-like infections were isolated from symptomatic leaves of different trees belonging to the Fabaceae, Malvaceae, Rosaceae and Ulmaceae. A polyphasic taxonomic approach by applying molecular data, morphological features and host data, was employed to identify the isolates. In a multi-gene phylogenetic analysis (LSU, ITS and RPB2), these isolates clustered in four clades in the Mycosphaerellaceae. The revealed taxa encompass Paracercosporidium microsorum on Tilia platyphyllos, Prathigadoides gleditsiae-caspicae gen. et. sp. nov. on Gleditsia caspica, Pruniphilomyces circumscissus on Prunus avium and Prunus cerasus, and Sirosporium celtidis on Celtis australis. The new genus Prathigadoides and its type species Prathigadoides gleditsiae-caspicae are molecularly distinct from all phylogenetically related genera, and some characteristics of the conidiophores and conidia differs from those of the morphologically similar species Prathigada condensata on the North America Gleditsia triacanthos.
- Published
- 2021
- Full Text
- View/download PDF
26. Farm 4.0: innovative smart dairy technologies and their applications as tools for welfare assessment in dairy cattle
- Author
-
S. Azarpajouh, J.A. Calderón Díaz, S. Bueso Quan, and H. Taheri
- Subjects
Agricultural science ,General Veterinary ,media_common.quotation_subject ,Business ,General Agricultural and Biological Sciences ,Welfare ,Dairy cattle ,Nature and Landscape Conservation ,media_common - Abstract
The growing world population has increased the demand for meat and milk products and has led to a rapid growth in the scale of cattle enterprises globally. As a result, livestock production would intensify even more with farmers aiming to maximize output per animal unit and it would lower the stockperson per animal ratio. This will result in less time available to monitor and manage individual animals properly, jeopardizing animal health and welfare. The recent advancement in technological and engineering tools and materials such as advanced sensors and sensing devices, and data processing and machine learning methods provide effective tools for the dairy industry to control qualitative and quantitative parameters related to dairy cattle health and welfare. This review paper will (a) explain smart dairy technologies, (b) describe on-farm cattle welfare assessment, and (c) discuss sensors applied in automatic cattle welfare assessment.
- Published
- 2021
- Full Text
- View/download PDF
27. Wettability alterations and magnetic field effects on the nucleation of magnetic nanofluids: A molecular dynamics simulation
- Author
-
Ali Koşar, Abdolali Khalili Sadaghiani, M. H. Taheri, and Mousa Mohammadpourfard
- Subjects
Ferrofluid ,Materials science ,Evaporation ,Nucleation ,02 engineering and technology ,021001 nanoscience & nanotechnology ,Condensed Matter Physics ,01 natural sciences ,Leidenfrost effect ,Atomic and Molecular Physics, and Optics ,010305 fluids & plasmas ,Electronic, Optical and Magnetic Materials ,Condensed Matter::Soft Condensed Matter ,Physics::Fluid Dynamics ,Contact angle ,Nanofluid ,Chemical engineering ,Boiling ,0103 physical sciences ,Materials Chemistry ,Wetting ,Physical and Theoretical Chemistry ,0210 nano-technology ,Spectroscopy - Abstract
In this study, the effects of surface wettability and nanoparticle concentration on boiling of ferrofluids were investigated with the application of magnetic field using molecular dynamics simulations. Liquid argon was considered as the base fluid with the use of Lennard-Jones fluid model. Two different surfaces (hydrophilic with contact angle of 40.5 degrees and hydrophobic with contact angle of 130.6 degrees) were taken into consideration to investigate the effect of nanoparticle presence on bubble formation over a uniformly heated wall. According to the obtained results, vapor film formation and nucleation depend on the interfacial wettability of nanoparticles and substrate. Compared to the pure liquid, film boiling does not easily happen in the ferrofluid containing hydrophilic nano particles, while it is easy to have vapor film in the nanofluid with hydrophobic nanoparticles. It was found that the momentum change due to external magnetic field dramatically alters the evaporation mechanism, resulting in lower liquid film temperature.
- Published
- 2018
- Full Text
- View/download PDF
28. Modeling and Performance Evaluation of Three Power Generation and Refrigeration Energy Recovery Systems from Thermal Loss of a Diesel Engine in Different Driving Conditions
- Author
-
H. Golchoobian, M. H. Taheri, S. Saedodin, and A. Sarafraz
- Abstract
This paper investigates the possibility of using three systems of organic Rankine auxiliary power generation, ejector refrigeration and absorption to recover energy from a diesel car. The analysis is done for both urban and suburban driving modes that vary from 60 to 120 km/h. Various refrigerants have also been used for organic Rankine and Ejector refrigeration cycles. The capacity was evaluated by Organic Rankine Cycle (ORC) system in both urban and suburban conditions for cyclopentane and ammonia as refrigerants. Also, for these two driving plans, produced cooling by absorption refrigeration system under variable ambient temperature conditions and in ejector refrigeration system for R123, R134a and R141b refrigerants were investigated.
- Published
- 2019
- Full Text
- View/download PDF
29. Measurement of Apparent Diffusion Coefficient (ADC) Values of Ependymoma and Medulloblastoma Tumors: a Patient-based Study
- Author
-
H Taheri and M B Tavakoli
- Subjects
lcsh:Medical physics. Medical radiology. Nuclear medicine ,Medulloblastoma ,Ependymoma ,Radiological and Ultrasound Technology ,medicine.diagnostic_test ,Pediatric Tumors ,business.industry ,lcsh:R895-920 ,DWI ,Bioengineering ,Magnetic resonance imaging ,medicine.disease ,Magnetic Resonance Imaging ,body regions ,ADC ,medicine ,Effective diffusion coefficient ,Original Article ,Radiology, Nuclear Medicine and imaging ,business ,Nuclear medicine ,Diffusion MRI - Abstract
Background: Some brain tumors such as ependymoma and Medulloblastoma have similar MR images which may result to undifferentiated them from each other. Objective: This study aimed to compare the apparent diffusion coefficient (ADC) of two different cerebellar pediatric tumors, including ependymoma and medulloblastoma which have shown similar clinical images in conventional magnetic resonance imaging (MRI) methods. Material and Methods: In this analytical study, thirty six pediatric patients who were suspected to have the mentioned tumors according to their CT image findings were included in this study. The patients were subjected to conventional MRI protocols followed by diffusion weighted imaging (DWI) and ADC values of the tumors were calculated automatically using MRI scanner software. Results: The mean (± SD) ADC value for ependymoma (1.2± 0.06 ×10-3 mm2/s) was significantly higher than medulloblastoma (0.87 ± 0.02 ×10-3 mm2/s) (p = 0.041). Moreover, the maximum ADC value of ependymoma was considerably different in comparison with medulloblastoma (1.4 ×10-3 mm2/s and 0.96×10-3 mm2/s, respectively; p = 0.035). Furthermore, the minimum ADC value of ependymoma was higher compared to medulloblastoma (1.0 ×10-3 mm2/s and 0.61×10-3 mm2/s, respectively), but there was not significant (p = 0.067). Conclusion: Evaluation of ADC values for ependymoma and medulloblastoma is a reliable method to differentiate these two malignancies. This is due to different ADC values reflected during the evaluation.
- Published
- 2019
- Full Text
- View/download PDF
30. Comparison of indirect fluorescent antibody assay and culture method
- Author
-
Eshraghi, S., Sarrafnejad, A., Roudsari, H. Taheri, and Shirazi, M. H.
- Published
- 2003
31. Relative expression of genes of menthol biosynthesis pathway in peppermint (Mentha piperita L.) after chitosan, gibberellic acid and methyl jasmonate treatments
- Author
-
F. Soleymani, A. R. Shafeinia, and H. Taheri
- Subjects
0106 biological sciences ,0301 basic medicine ,Limonene ,Methyl jasmonate ,Plant physiology ,Plant Science ,Biology ,Reductase ,01 natural sciences ,law.invention ,03 medical and health sciences ,chemistry.chemical_compound ,030104 developmental biology ,chemistry ,Biochemistry ,law ,Transcription (biology) ,Menthol ,Gibberellic acid ,Essential oil ,010606 plant biology & botany - Abstract
Menthol as an important component of monoterpenes essential oil in peppermint (Mentha piperita L.) is widely applied for medical and industrial uses. In this study, the effect of exogenous applications of chitosan (200 mg/L), gibberellic acid (50 mg/L) and methyl jasmonate (300 μM) was investigated in the main genes of menthol biosynthesis pathways within a 72 h time period using qRT-PCR. Transcript levels of most genes were either unaffected or down-regulated following chitosan treatment relative to control plants. Decreasing of geranyl diphosphate synthase (GDS) and limonene synthase (LS) genes transcript in chitosan treatment could possibly be effective in reducing of limonene level. On the other hand, it seems that an increase in menthone-menthol reductase (MMR) transcription level at 72 h under these treatments had a positive role in increasing the amount of menthol in this plant. Since exogenous application of gibberellic acid (GA3) down-regulated transcript levels of several genes involved in menthol biosynthesis, there is this expectance that GA3 treatment might not have a prominent role in enhancing menthol yield via transcription regulation. Transcript level of the majority genes after methyl jasmonate treatment gradually increased and reached the highest level at 72 h, therefore, it is possible that methyl jasmonate improves medicinal properties of M. piperita.
- Published
- 2017
- Full Text
- View/download PDF
32. Toughening phenolic composite laminates by interleaving hybrid pyrolytic carbon/polyvinyl butyral nanomat
- Author
-
Hossein Ipakchi, M. Oliaei, H. Saghafi, and H. Taheri
- Subjects
Toughness ,Thermogravimetric analysis ,Materials science ,Mechanical Engineering ,02 engineering and technology ,Composite laminates ,010402 general chemistry ,021001 nanoscience & nanotechnology ,01 natural sciences ,Industrial and Manufacturing Engineering ,0104 chemical sciences ,chemistry.chemical_compound ,Fracture toughness ,Polyvinyl butyral ,chemistry ,Mechanics of Materials ,Nanofiber ,Ceramics and Composites ,Thermal stability ,Pyrolytic carbon ,Composite material ,0210 nano-technology - Abstract
This paper is granted with a novel method for improving the toughness of phenolic composite laminates. This method employs electrospun hybrid nanofibers containing polyvinyl butyral (PVB) and pyrolytic carbon (PyC), which are interleaved between mid-layers of the laminate. Mode-II fracture test is used for studying the toughening behavior of modified laminates. The results suggest shortage of pure PVB nanofibers in causing a substantial increase in the fracture toughness of laminates (about 7% increase). However, incorporation of PyC particles to PVB nanofibers can enhance the fracture toughness up to about 24%. Scanning electron microscope images reveal the toughening mechanism provided by each type of nanofibrous mat. Thermal gravimetric analysis was also applied for studying the role of PyC particles in the thermal stability of PVB nanofibers.
- Published
- 2020
- Full Text
- View/download PDF
33. Normal-deformed structures in hafnium isotopes
- Author
-
A. Kardan, H. Taheri, and M. H. Hadizadeh Yazdi
- Subjects
Physics ,Isotope ,chemistry ,010308 nuclear & particles physics ,0103 physical sciences ,chemistry.chemical_element ,Atomic physics ,010306 general physics ,01 natural sciences ,Hafnium - Published
- 2018
- Full Text
- View/download PDF
34. Hydrogen failure sensitivity of A516-Gr70 and API 5L-X70 steels in sour environments
- Author
-
Abolghasem Dolati, Behrooz Beidokhti, and H Taheri
- Subjects
Materials science ,Hydrogen ,Scanning electron microscope ,General Chemical Engineering ,Metallurgy ,chemistry.chemical_element ,Corrosion ,Cracking ,Brine ,chemistry ,General Materials Science ,Technical committee ,Corrosion behavior ,Polarization (electrochemistry) - Abstract
Purpose – This paper aims to clarify the corrosion behavior of two famous structural steels in sour environment. These steels have a vast application in oil and gas industries. The study aims to find the effect of different concentrations of sour solution on the origin of crack in these steels. Design/methodology/approach – After preparation of specimens, different sour solutions were made using the synthetic brine (according to National Association of Corrosion Engineers [NACE], Technical Committee Report 1D182) and various amounts of Na2S.9H2O and CH3COOH. The polarization test was done by Potansiostat apparatus model Zahner-IM6 at two temperatures, 25°C and 50°C. The corrosion current densities were obtained from the polarization curves. Finally, the corrosion products and hydrogen-induced cracking (HIC) were investigated by Tescan Vega II XMU scanning electron microscope (SEM) linked to a Rontec energy-dispersive X-ray spectroscopy (EDS) system. Findings – API 5L-X70 steel showed smaller corrosion current values than A516-Gr70 steel. The HIC cracks propagated parallel to the surface of A516-Gr70 steel in three solutions and confirmed the inappropriateness of this steel for sour environment applications. Originality/value – This paper studies the effect of sour environment on the behavior of two famous industrial steels at two temperatures by new method.
- Published
- 2015
- Full Text
- View/download PDF
35. Measurement of Apparent Diffusion Coefficient (ADC) Values of Ependymoma and Medulloblastoma Tumors: a Patient-based Study.
- Author
-
H., Taheri and M. B., Tavakoli
- Subjects
DIFFUSION measurements ,MAGNETIC resonance imaging ,EPENDYMOMA ,DIFFUSION coefficients ,MEDULLOBLASTOMA - Abstract
Background: Some brain tumors such as ependymoma and Medulloblastoma have similar MR images which may result to undifferentiated them from each other. Objective: This study aimed to compare the apparent diffusion coefficient (ADC) of two different cerebellar pediatric tumors, including ependymoma and medulloblastoma which have shown similar clinical images in conventional magnetic resonance imaging (MRI) methods. Material and Methods: In this analytical study, thirty six pediatric patients who were suspected to have the mentioned tumors according to their CT image findings were included in this study. The patients were subjected to conventional MRI protocols followed by diffusion weighted imaging (DWI) and ADC values of the tumors were calculated automatically using MRI scanner software. Results: The mean (± SD) ADC value for ependymoma (1.2± 0.06 ×10
-3 mm²/s) was significantly higher than medulloblastoma (0.87 ± 0.02 ×10-3 mm²/s) (p = 0.041). Moreover, the maximum ADC value of ependymoma was considerably different in comparison with medulloblastoma (1.4 ×10-3 mm²/s and 0.96×10-3 mm²/s, respectively; p = 0.035). Furthermore, the minimum ADC value of ependymoma was higher compared to medulloblastoma (1.0 ×10-3 mm²s and 0.61×10-3 mm²/s, respectively), but there was not significant (p = 0.067). Conclusion: Evaluation of ADC values for ependymoma and medulloblastoma is a reliable method to differentiate these two malignancies. This is due to different ADC values reflected during the evaluation. [ABSTRACT FROM AUTHOR]- Published
- 2021
- Full Text
- View/download PDF
36. Effect of Intense Exercise Training on Hydrogen Peroxide, Tumor Necrosis Factor-Alpha and the Selected Neurotrophins in Rat’s Brain
- Author
-
Mohammad Esmaiel Afzalpour, H Abtahi, H Taheri Chadorneshin, and Mohsen Foadoddini
- Subjects
medicine.medical_specialty ,Sedentary control ,biology ,business.industry ,Alpha (ethology) ,General Medicine ,Surgery ,chemistry.chemical_compound ,Endocrinology ,nervous system ,chemistry ,Neurotrophic factors ,Internal medicine ,medicine ,Glial cell line-derived neurotrophic factor ,biology.protein ,Tumor necrosis factor alpha ,Treadmill ,business ,Hydrogen peroxide ,Neurotrophin - Abstract
Aims: Alpha tumor necrosis factor and Hydrogen peroxide increase in neurotrophins expression in several brain structures. The purpose of this study was to investigate the interactive effect of Hydrogen peroxide and neurotrophic tumor necrosis factor with brain-derived neurotrophic factor by glial cellderived neurotrophic factor after severe exercise. Materials & Methods: This experimental study was done on 16 adult Wistar albino rats 280g and 3months old. Animals were divided into two intense exercise and sedentary control groups. Animals ran for 6 weeks, 6 days a week, at the speed of 27m per minute and on treadmill for 60 minutes daily. Using kit, the content of BDNF, GDNF, and TNF-α were measured using sandwich ELISA and hydrogen peroxide levels was analyzed by colorimetric assay. Data analyzed by SPSS 16 and Independent-T test. Findings: Hydrogen peroxide levels in the brain, in intense exercise group increased significantly compared with control group (p= 0.006). TNF-α, GDNF and BDNF Levels in the brain in intense exercise group significantly increased compared with control group (p=0.001). Conclusion: Intense running on treadmill increase BDNF and GDNF content in brain of albino Wistar rats through increasing the H2O2 and TNF-α levels.
- Published
- 2015
- Full Text
- View/download PDF
37. P5598Multicenter observational trial to evaluate TEG6s oral anticoagulant assay in apixaban- treated patients
- Author
-
F. Zaman, M. Blessy, H. Taheri, C. Sandesara, Kevin P. Bliden, U. S. Tantry, Paul A. Gurbel, and Leonard Ilkhanoff
- Subjects
medicine.medical_specialty ,business.industry ,Observational Trial ,Internal medicine ,Oral anticoagulant ,Medicine ,Apixaban ,Cardiology and Cardiovascular Medicine ,business ,medicine.drug - Published
- 2017
- Full Text
- View/download PDF
38. Enquête sur les pratiques françaises d’analgésie en chirurgie thoracique (réalisée avec le concours de l’ARCOTHOVA)
- Author
-
Olivier Bastien, H. Taheri, G. Gayraud, Christian Dualé, and P. Schoeffler
- Subjects
Anesthesiology and Pain Medicine ,General Medicine - Abstract
Resume Objectifs Evaluer la pratique actuelle de l’analgesie apres thoracotomie et thoracoscopie en France. Type d’etude Enquete transversale de pratiques professionnelles. Materiel Medecins anesthesistes-reanimateurs referents pour les structures pratiquant la chirurgie thoracique au cours de l’annee 2012. Methode Questionnaire electronique concernant l’activite du centre en chirurgie thoracique et les modalites et frequences estimees de differentes techniques d’analgesie. L’evaluation principale etait en pourcentage estime d’actes, apres imputation sur les donnees originelles. Resultats Quatre-vingt-quatre centres sur 103 (82 %) ont repondu a l’enquete. Le couplage d’une anesthesie locoregionale a une anesthesie generale representait 74 % des thoracotomies et 35 % des thoracoscopies. Une pratique etait declaree par 68 centres (81 %) pour l’analgesie peridurale, et par 27 centres (32 %) pour le bloc paravertebral. Les caracteristiques les plus frequentes pour la pratique du bloc paravertebral etaient : ponction thoracique, debut peroperatoire, ropivacaine 0,2 % plus sufentanil, administration autocontrolee avec infusion plus bolus, duree superieure a 48 heures apres chirurgie. Les voies d’abord du bloc paravertebral etaient, en taux de pratique : posterieure par perte de resistance 34 %, posterieure echoguidee 24 %, chirurgicale 42 %. L’analgesie systemique la plus frequente etait la morphine intraveineuse autocontrolee. La ketamine etait utilisee pour 60 % des actes. Conclusions La pratique francaise de l’analgesie apres chirurgie thoracique a suivi au cours de la derniere decennie l’evolution dictee par les donnees de la science, mais plus du quart des thoracotomies ne beneficieraient pas des techniques recommandees d’analgesie peridurale/paravertebrale, contre 8 % seulement au Royaume-Uni en 2005.
- Published
- 2013
- Full Text
- View/download PDF
39. Study on different forms and phosphorus distribution in the coastal surface sediments of Southern Caspian Sea by using UV–Vis spectrophotometery
- Author
-
H. Taheri Saffar, H. Nasrollahzadeh Saravi, Shaban Najafpour, Abdolraouf Samadi-Maybodi, and Saeid Khodadoust
- Subjects
Geologic Sediments ,Geography ,Oceans and Seas ,Phosphorus ,chemistry.chemical_element ,Sediment ,Organic phosphorus ,Authigenic ,Iran ,Atomic and Molecular Physics, and Optics ,Analytical Chemistry ,Ultraviolet visible spectroscopy ,chemistry ,Environmental chemistry ,Seawater ,Spectrophotometry, Ultraviolet ,Extraction methods ,Instrumentation ,Spectroscopy ,Environmental Monitoring - Abstract
This paper presents distribution of phosphorus (total P, organic and inorganic P) in the southern of Caspian Sea sediments where collected from four sampling stations in the summer 2009. Several forms of the phosphorus in sediment were separated and extracted according to sequential extraction method. Then extracted phosphorus in each fraction was determined by UV-Vis spectrophotometery. Five forms of phosphorus were studied (i) loosely sorbed phosphorus, (ii) ferric-iron-bound phosphorus, (iii) authigenic phosphorus, (iv) detrital phosphorus, and (v) organic phosphorus. The total P contents were ranged from 124.5 to 328.2 μg g(-1). It was found that more than 98% of the total P is inorganic phosphorus (IP). Among the four forms of IP, loosely bound P, P-Fe, P-detrital and P-authigenic distribution ranges were 2.70-17.31%, 10.00-44.79%, 0.40-1.70% and 48.35-83.48%, respectively. Result also showed that the most abundant forms of phosphorus were authigenic phosphorus. Relative abundances of other forms of phosphorus follow the order: P-Fe>loosely bound-P>organic P>detrital P.
- Published
- 2013
- Full Text
- View/download PDF
40. Diagnostic Value of Ultrasonography in Patients Suspected Acute Appendicitis
- Author
-
A Bighamian, MA Elahifar, and H Taheri
- Subjects
Abdominal pain ,medicine.medical_specialty ,medicine.diagnostic_test ,business.industry ,Retrospective cohort study ,medicine.disease ,Predictive value ,Appendicitis ,Surgery ,Abdominal ultrasonography ,Acute appendicitis ,medicine ,In patient ,Radiology ,Ultrasonography ,medicine.symptom ,business - Abstract
Introduction: Appendectomy is one of the most frequently performed abdominal operations in surgical practice. Preoperative imaging has been demonstrated to improve diagnostic accuracy in appendicitis. Abdominal ultrasonography (US) is the most commonly and first-line imaging modality used for diagnosing acute appendicitis (AA).The aim of this study was to demonstrate the diagnostic value of abdominal ultrasonography for diagnosing acute appendicitis. Methods: In a retrospective study, we analyzed 200 consecutive patients with abdominal pain that undergoing appendectomy, from June 2009 to April 2012. Patient characteristics, preoperative ultrasonography (US) and laboratory assessment including WBC were collected. Final diagnosis of appendicitis was confirmed by histopathological examination. Results were compared with US. Results: Two hundred patients were admitted to this study that undergoing appendectomy. Mean age was 24 years (range: 1 to 91 years), and 57% were females. Patient White blood cell counts were found to be high in 78% while it was 86% for AA group and 64% for NA group (p < 0.05). One hundred sixty-six of these patients (83%) were diagnosed as acute appendicitis on pathology, and 34 (17%) were diagnosed differently. 157 of patients underwent US, eighty two of this patients diagnosed as acute appendicitis on US examinations and in 78 of them were also reported as acute appendicitis on histopathological examination. The sensitivity and specificity of abdominal US for diagnosing appendicitis were 70% and 90.2% respectively. Positive predictive value (PPV) was 93% and negative predictive value (NPV) was reported 62%. Conclusion: Ultrasonography has a high PPV and specificity, so as a diagnostic tool, positive US strongly suggests the diagnosis of AA. A low negative predictive value recommends that negative US is not sufficient to exclude the diagnosis of AA and patients could not be managed on an outpatient basis following a negative scan. Nepalese Journal of Radiology; Vol. 2; Issue 2; July-Dec. 2012; 13-19 DOI: http://dx.doi.org/10.3126/njr.v2i2.7680
- Published
- 2013
- Full Text
- View/download PDF
41. Ovarian Adult Granulosa Cell Tumor: Report of 3 Cases
- Author
-
S. Benkirane, H. Moustaide, H. Taheri, H. Saadi, and A. Mimouni
- Subjects
Pathology ,medicine.medical_specialty ,030219 obstetrics & reproductive medicine ,medicine.diagnostic_test ,business.industry ,Granulosa cell ,Ultrasound ,Adult population ,Magnetic resonance imaging ,Ovary ,03 medical and health sciences ,0302 clinical medicine ,medicine.anatomical_structure ,030220 oncology & carcinogenesis ,medicine ,Juvenile ,business ,Surgical treatment ,Adult form - Abstract
Granulosa tumors are rare malignant tumors of the ovary. There are two histological types: the adult form (95%) and the juvenile form (5%). They often occur in the adult population with extreme ages ranging from 40 to 70 years. The clinical signs are very variable with a slow evolution and a risk of recurrence that can go up to 30-40 years after the diagnosis. The radiological diagnosis is based on ultrasound data and magnetic resonance image (MRI). Radical surgical treatment is the basis of their therapeutic management.
- Published
- 2017
- Full Text
- View/download PDF
42. The unconventional geminivirusBeet curly top Iran virus: satisfying Koch's postulates and determining vector and host range
- Author
-
M. Vecchiati, Slavica Matić, S. A. A. Behjatnia, R. Soleimani, Gian Paolo Accotto, H. Taheri, and Keramat Izadpanah
- Subjects
Infectivity ,fungi ,Nucleic acid sequence ,food and beverages ,Nicotiana benthamiana ,Agrobacterium tumefaciens ,Biology ,biology.organism_classification ,Virology ,Leafhopper ,symbols.namesake ,genomic DNA ,Koch's postulates ,Curtovirus ,symbols ,Agronomy and Crop Science - Abstract
Beet curly top Iran virus (BCTIRV) is a geminivirus with unusual genomic organisation, recently reported in Iran, infecting sugarbeet and a few other plant species. Although three BCTIRV sequences have been reported, demonstration that BCTIRV DNA is the causal agent of the disease was missing. A full-length genomic DNA was obtained from symptomatic leaves of sugarbeet collected in the Sivand area of Iran, and its nucleotide sequence was determined (BCTIRV-Siv, 2845 nt). To satisfy Koch's postulates, an infectivity assay was developed by inserting a 1.4-mer of BCTIRV-Siv DNA in Agrobacterium tumefaciens and using it in agroinoculation experiments. The cloned viral DNA was capable of infecting sugarbeets, reproducing the leaf curling and vein enations observed in the field. These results demonstrate that the single DNA component of BCTIRV is sufficient for infectivity. Host range studies indicated that some economically important crops can be affected, such as spinach, tomato and sweet pepper, as well as important laboratory plants including Nicotiana benthamiana, Arabidopsis thaliana and Jimson weed. Circulifer haematoceps, the dominant leafhopper species present in sugarbeet fields in Iran, was successfully used to transmit the disease. The availability of an infectious clone will facilitate extended host range studies, to determine the potential risks to other crops, as well as genetic studies on this unusual member of the family Geminiviridae.
- Published
- 2012
- Full Text
- View/download PDF
43. A Survey on Corporate Sustainability Reporting: The Case of Iran
- Author
-
H Taheri, Bita Mashayekhi, and Mehdi Momeni Taheri
- Subjects
business.industry ,Corporate governance ,05 social sciences ,University teachers ,Sample (statistics) ,050201 accounting ,Judgment sample ,Public relations ,Corporate sustainability ,Statistical population ,0502 economics and business ,Sustainability ,Sustainability reporting ,Business ,050203 business & management - Abstract
Today, the issue of corporate sustainability is noted both in academic literature and in the business environment, and there are many companies and organizations that want to make their operations sustainable and communicate different dimensions of sustainability in their business to stakeholders through sustainability reporting. This paper seeks to provide a framework for corporate sustainability reporting by reviewing existing literature on sustainability reporting, taking into account the expertise of domestic experts, to provide a roadmap for developing corporate sustainability reports in Iran. The statistical population of this study includes professionals and academics, including university teachers and post- graduate students in business majors. Our sample was determined via judgment sampling and data was obtained through 119 designed questionnaires. The results of this research is summarized in a Corporate Sustainability Reporting Framework for Iran, which is developed based on Seven research questions related to preparers of sustainability reports; determinants of sustainability reporting; the content of sustainability reports; corporate governance mechanisms necessary for sustainability reporting; challenges and risks with regard to sustainability reporting; benefits of sustainability reports; and assurance of sustainability reports.
- Published
- 2019
- Full Text
- View/download PDF
44. Proposed enhanced spectra for near‐fault regions using forward directivity records
- Author
-
H. Taheri and A. Beitollahi
- Subjects
Engineering ,business.industry ,Seismic loading ,Building and Construction ,Near fault ,Directivity ,Spectral line ,Pulse (physics) ,Wavelet ,Earthquake hazard ,Safety, Risk, Reliability and Quality ,business ,Response spectrum ,Seismology - Abstract
PurposeThe purpose of this paper is to develop a proper tool for structural analysis and designing in near‐fault regions where the level of earthquake hazard is more and its nature is different from far‐field regions.Design/methodology/approachThe paper uses near‐fault records and pulse extraction using wavelet analysis and designs a spectra concept.FindingsThe paper developed a proper design spectra for near‐fault structural analysis and design.Originality/valueThis paper using pulse extraction for developing a 3D response spectrum with paying attention to earthquake magnitude is new and final design spectra proposed is valuable.
- Published
- 2010
- Full Text
- View/download PDF
45. Removal of cadmium and nickel from aqueous solution using expanded perlite
- Author
-
H. Taheri, Hamid Ghassabzadeh, Mohammad Ghannadi-Maragheh, Meisam Torab-Mostaedi, and S. J. Ahmadi
- Subjects
Aqueous solution ,Chromatography ,Chemistry ,General Chemical Engineering ,Metal ions in aqueous solution ,Inorganic chemistry ,Enthalpy ,lcsh:TP155-156 ,chemistry.chemical_element ,Langmuir adsorption model ,Kinetics ,Nickel ,symbols.namesake ,Adsorption ,Expanded Perlite ,Perlite ,symbols ,Freundlich equation ,lcsh:Chemical engineering ,Cadmium - Abstract
The adsorption characteristics of cadmium and nickel onto expanded perlite from aqueous solution have been investigated with respect to changes in pH of solution, adsorbent dosage, contact time and temperature of the solution. The maximum removal efficiency of Cd (II) is 88.8% at pH 6 and exposure to 10 g/L expanded perlite, while for Ni (II), it is 93.3% at the same pH and exposure to 8 g/L adsorbent. For the adsorption of both metals, the Freundlich isotherm model fitted the equilibrium data better than the Langmuir isotherm model. Experimental data are also evaluated in terms of kinetic characteristics of adsorption and it was found that the adsorption process for both metal ions follows well pseudo-second-order kinetics. Thermodynamic functions, the change of free energy (ΔG°), enthalpy (ΔH°) and entropy (ΔS°) of adsorption are also calculated for each metal ion. The results show that the adsorption of these metal ions on expanded perlite is feasible and exothermic at 20-50°C.
- Published
- 2010
- Full Text
- View/download PDF
46. Évolution de la fonction respiratoire postopératoire immédiate après résection pulmonaire pour cancer
- Author
-
Jean Baptiste Chadeyras, S. Aubreton, G. Galvaing, H. Taheri, V. Thooris, M. Filaire, Georges Escande, Patrick Bailly, and Adel Naamee
- Subjects
Pulmonary and Respiratory Medicine ,Gynecology ,medicine.medical_specialty ,business.industry ,medicine ,business - Abstract
Resume En chirurgie pulmonaire, l’evaluation du risque postoperatoire est toujours une preoccupation pour le clinicien. Il a ete demontre, lors de cette periode dans les lobectomies une perte disproportionnee de la capacite vitale (CV) et du volume expiratoire maximal par seconde (VEMS) par rapport aux valeurs predictives. L’objectif de ce travail a ete d’evaluer dans la periode postoperatoire precoce : (1) l’evolution des parametres fonctionnels respiratoires dans le cadre de lobectomies et de pneumonectomies pour cancer, (2) la part reversible de la restriction postoperatoire (effet thoracotomie). L’etude prospective a comporte l’evaluation de la fonction respiratoire en preoperatoire puis en postoperatoire au premier (j1), au cinquieme (j5) et au dixieme jours (j10) et au quatrieme mois (M4). Trente et un patients sans complication postoperatoire ont ete inclus. Les resections comportaient 19 lobectomies (âge moyen 59 ± 10 ans) et 12 pneumonectomies (âge moyen 56 ± 9 ans). Le mode ventilatoire dans les deux types de resection etait similaire jusqu’a j5. L’amputation de CV et de la capacite pulmonaire totale etait de l’ordre de 50 %. Les volumes de reserve expiratoire (VRE) et de reserve inspiratoire (VRI) etaient reduits n’atteignant que 40 % de la valeur preoperatoire. L’alteration du VEMS etait plus importante que sa valeur predictive surtout dans les lobectomies (52 ± 16 % a j5 versus 67 ± 14 % valeur predictive). Mais le VEMS/CV etait stable, temoignant d’un deficit restrictif dominant. Les resultats suggerent que l’amelioration du VEMS suit l’evolution des volumes mobilisables et notamment de la capacite inspiratoire et du VRI. Les conditions mecaniques et fonctionnelles respiratoires postoperatoires immediates justifient le developpement de l’entrainement inspiratoire.
- Published
- 2009
- Full Text
- View/download PDF
47. Application of the active learning method to the retrieval of pigment from spectral remote sensing reflectance data
- Author
-
Frank Fell, M. Vatandoust, Michael Schaale, H. Khodaparast, S. Bagheri Shouraki, H. Taheri Shahraiyni, Ahad Tavakoli, Jürgen Fischer, Masoud Tajrishy, and Rene Preusker
- Subjects
Artificial neural network ,Computer science ,Remote sensing reflectance ,General Earth and Planetary Sciences ,Ocean colour ,Fuzzy interpolation ,Remote sensing - Abstract
Due to the noise that is present in remote sensing data, a robust method to retrieve information is needed. In this study, the active learning method (ALM) is applied to spectral remote sensing reflectance data to retrieve in-water pigment. The heart of the ALM is a fuzzy interpolation method that is called the ink drop spread (IDS). Three datasets (SeaBAM, synthetic and NOMAD) are used for the evaluation of the selected ALM approach. Comparison of the ALM with the ocean colour 4 (OC4) algorithm and the artificial neural network (ANN) algorithm demonstrated the robustness of the ALM approach in retrieval of in-water constituents from remote sensing reflectance data. In addition, the ALM identified and ranked the most relevant wavelengths for chlorophyll and pigment retrieval.
- Published
- 2009
- Full Text
- View/download PDF
48. OUTBREAK OF cagA AND iceA IN H. PYLORI STRAINS ISOLATED FROM PATIENTS WITH GASTRO DUODENAL DISEASES IN BABOL CITY
- Author
-
J Shokri Shirvani, R Rajabnia, F Tohidi, M Asmar, and H Taheri
- Subjects
caga ,Medicine (General) ,R5-920 ,helicobacter pylori ,gasteroduodenal ,Medicine ,bacterial infections and mycoses ,icea ,digestive system diseases - Abstract
BACKGROUND AND OBJECTIVE: Helicobacter pylori is one of the most common bacteria that afflicts world’ human population. Virulence factor of Helicobacter pylori have been associated with clinical outcome of the infection including gastritis, gastric ulcer (GU), duodenal ulcer (DU) and gastric cancer. The aim of the present study was to determine the outbreak of cagA and iceA genotypes of H. pylori in patients with gastroduodenal diseases in Babol, North of Iran.METHODS: Fifty patients with dyspepsia underwent gastroscopy and antral biopsy for histologic study. CagA, iceA, iceA1 and iceA2 genotypes were determined by PCR. FINDINGS: Of 30(60%) HP positive strains, 80% were positive for cagA gene. CagA genotype was positive in 91.7% (11 of 12), 73.3% (11 of 15) and 66.7% (2 of 3) of patients with gastritis, DU and GU, respectively. IceA was positive in 21(70%) of all patients and iceA1 was found in 14(66.7%) isolates and iceA2 was found in 23.8% isolates. IceA1 and IceA2 were not found in 2(9.5%). IceA1 outbreak in patients with gastritis, DU and GU was 88.9%, 45.5% and 50%, respectively.CONCLUSION: Positive cagA strain was more than negative cagA and, iceA1 was predominant strains in our patients with HP infection. We found that two genes other than iceA1 and iceA2 in this study. It seems that new allele other than iceA1 and iceA2 genes are present in H. pylori.
- Published
- 2008
49. Effect of some essential oils on mycelial growth of Penicillium digitatum Sacc
- Author
-
Mahdi Yahyazadeh, Reza Omidbaigi, H Taheri, and Rasoul Zare
- Subjects
Penicillium digitatum ,biology ,Foeniculum ,Physiology ,Thymus vulgaris ,Salvia officinalis ,General Medicine ,biology.organism_classification ,Applied Microbiology and Biotechnology ,food.food ,law.invention ,Fungicide ,food ,law ,Botany ,Food science ,Eugenia caryophyllata ,Essential oil ,Mycelium ,Biotechnology - Abstract
The antifungal action of four essential oils of Foeniculum vulgare (fennel), Thymus vulgaris (thyme), Eugenia caryophyllata (Clove) and Salvia officinalis (sage) was tested in vitro against Penicillium digitatum Sacc. Direct contact and vapour phase were used to test the antifungal activity of these essential oils against P. digitatum that is responsible for green mould rot of citrus fruits. The vapour phase and direct contact of clove and thyme essential oils exhibited the strongest toxicity and totally inhibited the mycelial growth of the test fungus. Thyme and clove essential oils completely inhibited P. digitatum growth either when added into the medium 600 μl l−1 or by their volatiles with 24 μl per 8 cm diameter Petri dish. In in vitro mycelial growth assay showed fungistatic and fungicidal activity by clove and thyme essential oils. Sage and fennel oils did not show any inhibitory activity on this fungus. Scanning electron microscopy (SEM) was done to study the mode of action of clove oil in P. digitatum and it was observed that treatment with the oil leads to large alterations in hyphal morphology.
- Published
- 2007
- Full Text
- View/download PDF
50. TheIn VitroAction of Essential Oils onAspergillus flavus
- Author
-
Reza Omidbaigi, M. Yahyazadeh, Rasoul Zare, and H Taheri
- Subjects
Myrtus communis ,biology ,Petri dish ,Organic Chemistry ,Thymus vulgaris ,Aspergillus flavus ,engineering.material ,biology.organism_classification ,Biochemistry ,Analytical Chemistry ,law.invention ,Fungicide ,Horticulture ,law ,Botany ,engineering ,Eugenia caryophyllata ,Essential oil ,Lime - Abstract
The fungistatic and fungicidal activities of the essential oils of Thymus vulgaris L. (thyme), Myrtus communis L. (myrtle), Eugenia caryophyillata (clove) and Citrus aurantifolia (lime) were determined, and most effective essential oils were found to those of thyme and clove. Thyme and clove oils completely inhibited A. flavus growth either when added into the medium at 600 and 900 µl l-1 or by the volatile oil with 12 and 24 µl per 8cm diameter Petri dish.
- Published
- 2007
- Full Text
- View/download PDF
Catalog
Discovery Service for Jio Institute Digital Library
For full access to our library's resources, please sign in.