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Using Remote Sensing Data to Delineate the Lineaments for Hydrothermal Mineral Prediction in Heqing Area, Northwest Yunnan Province, China

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Journal of China University of Geosciences 2007年第2期18卷 142-147页

作者： Mansour S Al-Mokredi 胡光道 bassam F Al bassam Faculty of Earth Resources China University of Geosciences

Lineament extraction and analysis is one of the routine work in mapping medium and large areas using remote sensing data, most of which are satellite images. Landsat Enhanced Thematic Mapper （ETM） of 945×1 232 pixels subscene acquired on 21 March 2000 covering the northwestern part of Yunnan Province has been digitally processed using ER Mapper software. This article aims to produce lineament density map that predicts favorable zones for hydrothermal mineral occurrences and quantify spatial associations between the known hydrothermal mineral deposits. In the process of lineament extraction a number of image processing techniques were applied. The extracted lineaments were imported into MapGIS software and a suitable grid of 100 m×100 m was chosen. The Kriging method was used to create the lineament density map of the area. The results show that remote sensing data could be useful to extract the lineaments in the area. These lineaments are closely correlated with the faults obtained through other geological investigation methods. On comparing with field data the lineament-density map identifies two important high prospective zones, where large-scale deposits are already existing. In addition the map highlights unrecognized target areas that require follow up investigation.

关键词： lineament extraction hydrothermal mineral prediction Kriging method Heqing area(China)

Occult sporadic insulinoma: Localization and surgical strategy

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World Journal of Gastroenterology 2008年第5期14卷 657-665页

作者： bassam Abboud Joe Boujaoude Department of General Surgery Hotel Dieu de France Hospital Faculty of Medicine Saint-Joseph University Beirut 166830 Lebanon Department of Gastroenterology Hotel Dieu de France Hospital Faculty of Medicine Saint-Joseph University Beirut 166830 Lebanon

Insulinomas continue to pose a diagnostic challenge to physicians, surgeons and radiologists alike. Most are intrapancreatic, benign and solitary. Biochemical diagnosis is obtained and imaging techniques to localize lesions continue to evolve. Surgical resection is the treatment of choice. Despite all efforts, an occult insulinoma (occult insulinoma refers to a biochemically proven tumor with indeterminate anatomical site before operation) may still be encountered. New localization preoperative techniques decreases occult cases and the knowledge of the site of the mass before surgery allows to determine whether enucleation of the tumor or pancreatic resection is likely to be required and whether the tumor is amenable to removal via a laparoscopic approach. In absence of preoperative localization and intraoperative detection of an insulinoma, blind pancreatic resection is not recommended.

关键词： Insulinoma Occult CT scan Endoscopic ultrasonography Surgery Laparoscopy

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Eosinophilic colitis

World Journal of Gastroenterology 2009年第24期15卷 2975-2979页

作者： Nnenna Okpara bassam Aswad Gyorgy Baffy Division of Gastroenterology Department of Medicine Rhode Island Hospital and Alpert Medical School of Brown University Department of Pathology Rhode Island Hospital and Alpert Medical School of Brown University

Eosinophilic colitis (EC) is a rare form of primary eosinophilic gastrointestinal disease with a bimodal peak of prevalence in neonates and young adults. EC remains a little understood condition in contrast to the increasingly recognized eosinophilic esophagitis. Clinical presentation of EC is highly variable according to mucosal, transmural, or serosal predominance of inflammation. EC has a broad differential diagnosis because colon tissue eosinophilia often occurs in parasitic infection, drug-induced allergic reactions, inflammatory bowel disease, and various connective tissue disorders, which require thorough searching for secondary causes that may be specifically treated with antibiotics or dietary and drug elimination. Like eosinophilic gastrointestinal disease involving other segments of the gastrointestinal tract, EC responds very well to steroids that may be spared by using antihistamines, leukotriene inhibitors and biologics.

关键词： Eosinophilia Colitis Gastrointestinal disease Ascites

Structural and electrical investigation of BLT films deposited at different times using electron beam evaporation technique

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Optoelectronics Letters 2023年第6期19卷 347-352页

作者： bassam Abdallah Fareza Nasrallah Asmahan Obied Department of Physics Atomic Energy CommissionP.O.Box 6091DamascusSyria

Thin films Bi_(4)Ti_(3)O_(12)(BLT) were deposited using electron beam evaporation on silicon substrate at several times,also on AlN/Si and SiO_(2)/Si *** films morphology and thickness were measured via scanning electron microscopy(SEM).The crystallography was studied using X-ray diffraction(XRD) technique for films which have a(0010) preferred orientation in all substrate *** capacitance values were contingent on frequency value in C-V *** ferroelectric characterization was investigated for BLT film deposited on isolator layer(SiO_(2) or AlN) for Al/Bi_(4)Ti_(3)O_(12)/SiO_(2)/Si *** effect value varied from 1 V to 3 V depending on the thin films isolator on substrate.

关键词： beam films ferroelectric

Acute mesenteric ischemia after cardio-pulmonary bypass surgery

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World Journal of Gastroenterology 2008年第35期14卷 5361-5370页

作者： bassam Abboud Ronald Daher Joe Boujaoude Department of General Surgery Hotel Dieu de France HospitalFaculty of MedicineSaint-Joseph UniversityBeirut 16-6830Lebanon Department of Gastroenterology Hotel Dieu de France HospitalFaculty of MedicineSaint-Joseph UniversityBeirut 16-6830Lebanon

Acute mesenteric ischemia (AMI) is a highly-lethal surgical emergency. Several pathophysiologic events (arterial obstruction, venous thrombosis and diffuse vasospasm) lead to a sudden decrease in mesenteric blood flow. Ischemia/reperfusion syndrome of the intestine is responsible for systemic abnormalities, leading to multi-organ failure and death. Early diagnosis is difficult because the clinical presentation is subtle, and the biological and radiological diagnostic tools lack sensitivity and specificity. Therapeutic options vary from conservative resuscitation, medical treatment, endovascular techniques and surgical resection and revascularization. A high index of suspicion is required for diagnosis, and prompt treatment is the only hope of reducing the mortality rate. Studies are in progress to provide more accurate diagnostic tools for early diagnosis. AMI can complicate the post-operative course of patients following cardio-pulmonary bypass (CPB). Several factors contribute to the systemic hypo-perfusion state, which is the most frequent pathophysiologic event. In this particular setting, the clinical presentation of AMI can be misleading, while the laboratory and radiological diagnostic tests often produce inconclusive results. The management strategies are controversial, but early treatment is critical for saving lives. Based on the experience of our team, we consider prompt exploratory laparotomy, irrespective of the results of the diagnostic tests, isthe only way to provide objective assessment and adequate treatment, leading to dramatic reduction in the mortality rate.

关键词： Acute mesenteric ischemia Non-occlusive Cardio-pulmonary bypass Laparotomy Prognosis Mortality

Improved Geological Interpretation Using Landsat TM Data in Lancang-Jinghong Area, Yunnan Province, China

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Journal of China University of Geosciences 2003年第1期14卷 52-58页

作者： bassam F Al bassam Faculty of Earth Resources China Universityof Geosciences

Landsat TM digital spectral data of Lancang Jinghong area (Yunnan P ro vince) has been used for the purpose of geological interpretation. To meet this object, different image processing techniques including selected band color comp osites, principal component analysis and IHS decorrelation stretching are used t o improve the discrimination of different lithological and structural features i n the *** was found that IHS decorrelation stretching images obtained from t he transformation of false color composite 741 (in red, green and blue) prov ided the best results based on the original *** combining the characteristic s of images produced by different approaches and other canonically transformed i mages with available geological data and surface observations, the geological in terpretation could be done with satisfactory degree of accuracy.

关键词： Landsat TM color composite images principal component analysis (PCA) IHS decorrelation stretching Lancang Jinghong China.

GIS Predictive Model for Producing Hydrothermal Gold Potential Map Using Weights of Evidence Approach in Gengma Region, Sanjiang District, China

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Journal of China University of Geosciences 2003年第3期14卷 283-292页

作者： bassam F Al bassam Faculty of Earth Resources

Gengma region, Sanjiang district is known to have some large-scale gold deposits. GIS predictive model for hydrothermal gold potential was carried out in this region using weights of evidence modeling technique. Datasets used include large-scale hydrothermal gold deposit records, geological, geophysical and remote sensing imagery. Based on the geological and mineral characteristics of areas with known gold occurrences in Sanjiang, several geological features were thought to be indicative of areas with potential for the occurrence of hydrothermal gold deposits. Indicative features were extracted from geoexploration datasets for use as input in the predictive model. The features include host rock lithology, geologic structures, wallrock alteration and associated (volcanic-plutonic) igneous rocks. To determine which of the indicative geological features are important spatial predictors of area with potential for gold deposits, spatial analysis was done through the modeling method. The input maps were buffered and the optimum distance of spatial association for each geological feature was determined by calculating the contrast and studentized contrast. Five feature maps were converted to binary predictor patterns and used as evidential layers for predictive modeling. The binary patterns were integrated in two combinations, each of which consists of four patterns in order to avoid over prediction due to the effect of duplicate features in the two structural evidences. The two produced potential maps define almost similar favorable zones. Areas of intersections between these zones in the two potential maps placed the highest predictive favorable zones in the region.

关键词： geographic information system weights of evidence mineral resource prediction Sanjiang district

Digestive manifestations of parathyroid disorders

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World Journal of Gastroenterology 2011年第36期17卷 4063-4066页

作者： bassam Abboud Ronald Daher Joe Boujaoude Department of General Surgery Hotel Dieu de France HospitalFaculty of MedicineSaintJoseph UniversityBeirut 166830Lebanon Department of Gastroenterology Hotel Dieu de France HospitalFaculty of MedicineSaint-Joseph UniversityBeirut 166830Lebanon

The parathyroid glands are the main regulator of plasma calcium and have a direct influence on the digestive *** disturbances often result in unknown long-standing *** main manifestation of hypoparathyroidism is steatorrhea due to a deficit in exocrine pancreas *** association with celiac sprue may contribute to *** causes smooth-muscle atony,with upper and lower gastrointestinal symptoms such as nausea,heartburn and *** and peptic ulcer were strongly linked before the advent of proton pump ***,this association remains likely only in the particular context of multiple endocrine neoplasia type 1/Zollinger-Ellison *** contrast to chronic pancreatitis,acute pancreatitis due to primary hyperparathyroidism is one of the most studied *** causative effect of high calcium level is confirmed and the distinction from secondary hyperparathyroidism is *** digestive manifestations of parathyroid malfunction are often overlooked and serum calcium level must be included in the routine workup for abdominal symptoms.

关键词： Dysparathyroidism Hypoparathyroidism Hyperparathyroidism Digestive manifestations Steatorrhea Pancreatitis Pepticulcer

Repositioning of dipeptidyl peptidase-4 inhibitors and glucagon like peptide-1 agonists as potential neuroprotective agents

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Neural Regeneration Research 2019年第5期14卷 745-748页

作者： Shaker A.Mousa bassam M.Ayoub Pharmaceutical Research Institute Albany College of Pharmacy and Health Sciences The Center for Drug Research and Development (CDRD) Pharmaceutical Chemistry Department Faculty of Pharmacy The British University in Egypt

Repositioning of dipeptidyl peptidase-4 inhibitors and glucagon like peptide-1 receptor agonists is a breakthrough in the field of neural regeneration research increasing glucagon like peptide-1 bioavailability, hence its neuroprotective activities. In this article, the authors suggest not only crossing blood-brain barrier and neurodegenerative disease as off target for dipeptidyl peptidase-4 inhibitors and glucagon like peptide-1 receptor agonists, but also for ophthalmic preparations for diabetic retinopathy, which may be the latest breakthrough in the field if prepared and used in an appropriate nano-formulation to target the retinal nerves. The relation of neurodegenerative diseases' different mechanisms to the dipeptidyl peptidase-4 inhibitors and glucagon like peptide-1 receptor agonists should be further examined in preclinical and clinical settings. The repositioning of already marketed antidiabetic drugs for neurodegenerative diseases should save the high cost of the time-consuming normal drug development process. Drug repositioning is a hot topic as an alternative to molecular target based drug discovery or therapeutic switching. It is a relatively inexpensive pathway due to availability of previous pharmacological and safety data. The glucagon like peptide-1 produced in brain has been linked to enhanced learning and memory functions as a physiologic regulator in central nervous system by restoring insulin signaling. Intranasal administration of all marketed gliptins(or glucagon like peptide-1 receptor agonists) may show enhanced blood-brain barrier crossing and increased glucagon like peptide-1 levels in the brain after direct crossing of the drug for the olfactory region, targeting the cerebrospinal fluid. Further blood-brain barrier crossing tests may extend dipeptidyl peptidase-4 inhibitors' effects beyond the anti-hyperglycemic control to intranasal spray, intranasal powder, or drops targeting the blood-brain barrier and neurodegenerative diseases wit

关键词： repositioning DPP-4 inhibitors GLP-1RA neural regeneration blood-brain barrier Parkinson’s disease Alzheimer’s disease diabetic retinopathy