AIM： To analyze the characteristics of epidemiological, clinical and survival patterns among patients with carcinoma of the stomach. METHODS： We retrospectively studied the characteristics of 186 gastric adenocarcin...AIM： To analyze the characteristics of epidemiological, clinical and survival patterns among patients with carcinoma of the stomach. METHODS： We retrospectively studied the characteristics of 186 gastric adenocarcinoma patients at Ahwaz Jundishapur University Hospitals （AJSUH） from September 1, 1996 to September 1, 2002. All the patients had histopathologically-confirmed malignancy. Demographic variables, family history of gastric cancer （GC）, clinicopathologic characteristics and treatment-related variables were analyzed. Univariate analysis was performed with the log-rank test and multivariate analysis with Cox regression. P 〈 0.05 was considered statistically significant. RESULTS： Male to female ratio was 2.6：1. The mean age was 60.6 years and 14% of the patients were younger than 40 years. Adenocarcinoma, gastric lymphoma, and gastric metastasis were found in 94.5%, 2.3%, and 3% patients, respectively. There was an average of 6-mo delay between the initial symptoms and the diagnosis. Among adenocarcinoma groups, intestinal type was the commonest （55.9%） and the distal third was the most common localization （88.4%）. One hundred and thirty-four patients （72.1%） were males. Thirty-one patients （17%） had a family history of GC. Surgery was performed in 90% of patients （non-curative）. CONCLUSION： The epidemiological features of GC in south Iran mimic those in high-risk areas. There is a higher frequency of GC in young patients at our institution. Patients are detected and treated after a relatively long delay. Most patients present in advanced stages, which favors a poor overall survival, Family history of GC has a significant problem in our area, Studying the etiology of this cancer in south Iran and earlier diagnosis and subsequent better cares are recommended.展开更多
Many developed researches have confirmed the increasing of dust event and its dangerous impacts on the environment, health, economy, etc. in west and southwest ofIranduring the recent decade. This investigation aims t...Many developed researches have confirmed the increasing of dust event and its dangerous impacts on the environment, health, economy, etc. in west and southwest ofIranduring the recent decade. This investigation aims to have a comparison between the derived outputs from the dust simulation models and satellite images analysis over 22-26 June 2010, as this spell is considered a typical case of the dust event over the western/southwestern parts of Iran. We found that the obtained results from the HYSPLIT and WRF/CHEM models respectively on dust dispersion trajectories and aerosol concentration rate were reliable to be used in dust prediction systems over the region.展开更多
Identification and extraction length of dry spells in arid and semi-arid regions is very important. Thus, the use of climate change prediction models for study the behavior of the climatic parameters in the future tim...Identification and extraction length of dry spells in arid and semi-arid regions is very important. Thus, the use of climate change prediction models for study the behavior of the climatic parameters in the future time is inevitable. With recognition of the spatial and temporal behavior variables such as precipitation, we can prevent from destructive effects. In this research, the performance of Atmosphere-Ocean General Circulation Models (AOGCMs) was evaluated for simulation length of dry spells in the south-western area of Iran. The results show that the length of dry spell is relatively decreased in cold seasons (autumn and winter) and increased in the warm season (spring and summer) in both A2 and B2 Scenarios. The length of the dry spell on monthly scale for scenario A2 is 6% (equivalent to 2 days) and for scenario B2 is 9 percent (approximately 2.4 day) increased compared to the baseline period. For assess the uncertainty, AOGCMs were weighting. The results show that the best model for simulation of dry spells is HADCM3 and GFCM2.1, because the results have a less error. On the other hand, NCCCSM have the lowest weight for simulation dry spells in both scenarios.展开更多
Objective:To evaluate the prevalence of West Nile virus seropositivity in the general population of Mashhad.Northeast of Iran.Methods:One hundred and eighty two individuals living in the city of Mashhad were studied u...Objective:To evaluate the prevalence of West Nile virus seropositivity in the general population of Mashhad.Northeast of Iran.Methods:One hundred and eighty two individuals living in the city of Mashhad were studied using cluster sampling method.Both IgM and IgG antibodies against WNV were detected by ELISA method.Results:In this study,the overall IgG seroprevalence of positive West Nile virus was 11%;however.IgM antibody was not found in the participants.Conclusions:Our study suggested that the prevalence rate of West virus is considerable in Mashhad city.It seems necessary for clinicians and health care workers to be aware of WNV infection in the Northeast Iran.展开更多
Based on extensive field work in the northern Zagros Mountains, a new subspecies of Darevskia raddei （Boettger, 1892） from the west Azerbaijan Province, northwestern Iran is described. The new subspecies is distingu...Based on extensive field work in the northern Zagros Mountains, a new subspecies of Darevskia raddei （Boettger, 1892） from the west Azerbaijan Province, northwestern Iran is described. The new subspecies is distinguishable from all the other three subspecies of D. raddei based on the combination of several distinguishing characters, such as dorsal body with 50-55 oval to round, smooth, or very weakly keeled, scales, 25-31 scales across the gular region, 18-20 femoral pores on each side of body （reaching the knee）, 29-31 tuberculate lamellae under the fourth toe, 11-12 supraciliaries, 9-11 collars and a specific color pattern. The new subspecies meets all the morphological characters described by Eiselt et al. （1993） for an undefined and intermediate form between D. raddei raddei in the east of and D. r vanensis in the west of the distribution range of the species.展开更多
West Nile virus (WNV) is found in 26 provinces of Iran in humans, horses, and birds. Due to lack of vaccines, the only method to reduce the risk of the disease in communities is to increase people''s awareness...West Nile virus (WNV) is found in 26 provinces of Iran in humans, horses, and birds. Due to lack of vaccines, the only method to reduce the risk of the disease in communities is to increase people''s awareness. Lack of killing and overhunting of animals does not alter the infected-blood transmission from animals to humans by mosquito bites, but can reduce disease transmission risks including the transmission of West Nile fever (WNF) to humans. WNV is an enveloped Flavivirus that in nature has an enzootic cycle between mosquitoes and birds. The virus has occasional epizootic spillover causing disease in humans and horses. WNV-transmitting mosquitoes are widespread around the world, and the geographical range of transmission and the disease has increased over the past seven decades. Most human infections with WNV are asymptomatic, but severe neurological disease may develop resulting in long-term complications or death. Given the increasing trend of reported human WNF cases, it is necessary to implement surveillance programs and increase awareness of people and health staff about the function of biological factors including carnivores in the hunting of infected animals and collecting their carcass from nature. Hunting and killing of birds and dogs living near humans increase both the risk of deviation of blood-feeding of the zoophilic mosquitoes to humans and the outbreak of the disease.展开更多
This paper studies the lithofacies,sedimentary facies,depositional models and reservoir architecture of the rudist-bearing Sar-3 zone of Cretaceous Sarvak in the Southwest of Iran by utilizing coring,thin section,XRD ...This paper studies the lithofacies,sedimentary facies,depositional models and reservoir architecture of the rudist-bearing Sar-3 zone of Cretaceous Sarvak in the Southwest of Iran by utilizing coring,thin section,XRD data of five coring wells and 3D seismic data.Research results include the following:According to lithofacies features and their association,the rudist-mound and tidal flat are the main microfacies in the Sar-3 depositional time.By investigating the regional tectonic setting and seismic interpretation,a depositional model was built for the Sar-3 zone,which highlights four key points:1)The distribution of the rudist-buildup is controlled by the paleo-high.2)The build-up outside of the wide colonize stage but reached the wave-base level in a short time by regression and formation uplift,and was destroyed by the high energy current,then forming the moundy allochthonous deposition after being dispersed and redeposited.3)The tidal flat develops widely in the upper Sar-3,and the deposition thickness depends on the paleo-structure.The tidal channel develops in the valley and fringe of the Paleo-structure.4)The exposure within the leaching effect by the meteoric water of the top of Sar-3 is the main controlling factor of the reservoir vertical architecture.The Sar-3 zone featured as the dualistic architecture consists of two regions:the lower is the rudist reef limestone reservoir and the upper is the tidal condense limestone interlayer.The thickness of each is controlled by the paleo-structure.The Paleo-high zone is the preferential development zone.Based on reservoir characteristics of the different zones,a targeted development strategy has been proposed.Keeping the trajectory in the middle of the oillayer in the paleo-high,and in the paleo-low,make the trajectory crossing the oil-zone and then keep it in the lower.展开更多
文摘AIM： To analyze the characteristics of epidemiological, clinical and survival patterns among patients with carcinoma of the stomach. METHODS： We retrospectively studied the characteristics of 186 gastric adenocarcinoma patients at Ahwaz Jundishapur University Hospitals （AJSUH） from September 1, 1996 to September 1, 2002. All the patients had histopathologically-confirmed malignancy. Demographic variables, family history of gastric cancer （GC）, clinicopathologic characteristics and treatment-related variables were analyzed. Univariate analysis was performed with the log-rank test and multivariate analysis with Cox regression. P 〈 0.05 was considered statistically significant. RESULTS： Male to female ratio was 2.6：1. The mean age was 60.6 years and 14% of the patients were younger than 40 years. Adenocarcinoma, gastric lymphoma, and gastric metastasis were found in 94.5%, 2.3%, and 3% patients, respectively. There was an average of 6-mo delay between the initial symptoms and the diagnosis. Among adenocarcinoma groups, intestinal type was the commonest （55.9%） and the distal third was the most common localization （88.4%）. One hundred and thirty-four patients （72.1%） were males. Thirty-one patients （17%） had a family history of GC. Surgery was performed in 90% of patients （non-curative）. CONCLUSION： The epidemiological features of GC in south Iran mimic those in high-risk areas. There is a higher frequency of GC in young patients at our institution. Patients are detected and treated after a relatively long delay. Most patients present in advanced stages, which favors a poor overall survival, Family history of GC has a significant problem in our area, Studying the etiology of this cancer in south Iran and earlier diagnosis and subsequent better cares are recommended.
文摘Many developed researches have confirmed the increasing of dust event and its dangerous impacts on the environment, health, economy, etc. in west and southwest ofIranduring the recent decade. This investigation aims to have a comparison between the derived outputs from the dust simulation models and satellite images analysis over 22-26 June 2010, as this spell is considered a typical case of the dust event over the western/southwestern parts of Iran. We found that the obtained results from the HYSPLIT and WRF/CHEM models respectively on dust dispersion trajectories and aerosol concentration rate were reliable to be used in dust prediction systems over the region.
文摘Identification and extraction length of dry spells in arid and semi-arid regions is very important. Thus, the use of climate change prediction models for study the behavior of the climatic parameters in the future time is inevitable. With recognition of the spatial and temporal behavior variables such as precipitation, we can prevent from destructive effects. In this research, the performance of Atmosphere-Ocean General Circulation Models (AOGCMs) was evaluated for simulation length of dry spells in the south-western area of Iran. The results show that the length of dry spell is relatively decreased in cold seasons (autumn and winter) and increased in the warm season (spring and summer) in both A2 and B2 Scenarios. The length of the dry spell on monthly scale for scenario A2 is 6% (equivalent to 2 days) and for scenario B2 is 9 percent (approximately 2.4 day) increased compared to the baseline period. For assess the uncertainty, AOGCMs were weighting. The results show that the best model for simulation of dry spells is HADCM3 and GFCM2.1, because the results have a less error. On the other hand, NCCCSM have the lowest weight for simulation dry spells in both scenarios.
基金supported by Mashhad University of Medical Sciences.Mashhad.Iran(grant No.88290)Arboviruses and Viral Hemorrhagic Fevers Laboratory(National Ref.Lab).Pasteur Institute of Tehran.Iran
文摘Objective:To evaluate the prevalence of West Nile virus seropositivity in the general population of Mashhad.Northeast of Iran.Methods:One hundred and eighty two individuals living in the city of Mashhad were studied using cluster sampling method.Both IgM and IgG antibodies against WNV were detected by ELISA method.Results:In this study,the overall IgG seroprevalence of positive West Nile virus was 11%;however.IgM antibody was not found in the participants.Conclusions:Our study suggested that the prevalence rate of West virus is considerable in Mashhad city.It seems necessary for clinicians and health care workers to be aware of WNV infection in the Northeast Iran.
文摘Based on extensive field work in the northern Zagros Mountains, a new subspecies of Darevskia raddei （Boettger, 1892） from the west Azerbaijan Province, northwestern Iran is described. The new subspecies is distinguishable from all the other three subspecies of D. raddei based on the combination of several distinguishing characters, such as dorsal body with 50-55 oval to round, smooth, or very weakly keeled, scales, 25-31 scales across the gular region, 18-20 femoral pores on each side of body （reaching the knee）, 29-31 tuberculate lamellae under the fourth toe, 11-12 supraciliaries, 9-11 collars and a specific color pattern. The new subspecies meets all the morphological characters described by Eiselt et al. （1993） for an undefined and intermediate form between D. raddei raddei in the east of and D. r vanensis in the west of the distribution range of the species.
基金The authors would like to thank Research Health vice-chancellery of Ahvaz Jundishapur University of Medical Sciences and Kashan University of Medical Sciences for their cooperation.
文摘West Nile virus (WNV) is found in 26 provinces of Iran in humans, horses, and birds. Due to lack of vaccines, the only method to reduce the risk of the disease in communities is to increase people''s awareness. Lack of killing and overhunting of animals does not alter the infected-blood transmission from animals to humans by mosquito bites, but can reduce disease transmission risks including the transmission of West Nile fever (WNF) to humans. WNV is an enveloped Flavivirus that in nature has an enzootic cycle between mosquitoes and birds. The virus has occasional epizootic spillover causing disease in humans and horses. WNV-transmitting mosquitoes are widespread around the world, and the geographical range of transmission and the disease has increased over the past seven decades. Most human infections with WNV are asymptomatic, but severe neurological disease may develop resulting in long-term complications or death. Given the increasing trend of reported human WNF cases, it is necessary to implement surveillance programs and increase awareness of people and health staff about the function of biological factors including carnivores in the hunting of infected animals and collecting their carcass from nature. Hunting and killing of birds and dogs living near humans increase both the risk of deviation of blood-feeding of the zoophilic mosquitoes to humans and the outbreak of the disease.
文摘This paper studies the lithofacies,sedimentary facies,depositional models and reservoir architecture of the rudist-bearing Sar-3 zone of Cretaceous Sarvak in the Southwest of Iran by utilizing coring,thin section,XRD data of five coring wells and 3D seismic data.Research results include the following:According to lithofacies features and their association,the rudist-mound and tidal flat are the main microfacies in the Sar-3 depositional time.By investigating the regional tectonic setting and seismic interpretation,a depositional model was built for the Sar-3 zone,which highlights four key points:1)The distribution of the rudist-buildup is controlled by the paleo-high.2)The build-up outside of the wide colonize stage but reached the wave-base level in a short time by regression and formation uplift,and was destroyed by the high energy current,then forming the moundy allochthonous deposition after being dispersed and redeposited.3)The tidal flat develops widely in the upper Sar-3,and the deposition thickness depends on the paleo-structure.The tidal channel develops in the valley and fringe of the Paleo-structure.4)The exposure within the leaching effect by the meteoric water of the top of Sar-3 is the main controlling factor of the reservoir vertical architecture.The Sar-3 zone featured as the dualistic architecture consists of two regions:the lower is the rudist reef limestone reservoir and the upper is the tidal condense limestone interlayer.The thickness of each is controlled by the paleo-structure.The Paleo-high zone is the preferential development zone.Based on reservoir characteristics of the different zones,a targeted development strategy has been proposed.Keeping the trajectory in the middle of the oillayer in the paleo-high,and in the paleo-low,make the trajectory crossing the oil-zone and then keep it in the lower.
