检索结果-南通市图书馆

Optical simulation of external quantum efficiency spectra of CuIn_(1-x)Ga_xSe_2 solar cells from spectroscopic ellipsometry inputs

引用

Journal of Energy Chemistry 2018年第4期27卷 1151-1169页

作者： abdel-rahman a.ibdah Prakash Koirala Puruswottam Aryal Puja Pradhan Michael J.Heben Nikolas J.Podraza Sylvain Marsillac Robert W.Collins Department of Physics & Astronomy and Center for Photovoltaics Innovation & Commercialization University of Toledo Virginia Institute of Photovoltaics Old Dominion University

Applications of in-situ and ex-situ spectroscopic ellipsometry （SE） are presented for the development of parametric expressions that define the real and imaginary parts （ε1, ε2） of the complex dielectric function spectra of thin film solar cell components. These spectra can then be utilized to analyze the structure of complete thin film solar cells. Optical and structural/compositional models of complete solar cells developed through least squares regression analysis of the SE data acquired for the complete cells enable simulations of external quantum efficiency （EQE） without the need for variable parameters. Such simulations can be compared directly with EQE measurements. From these comparisons, it becomes possible to understand in detail the origins of optical and electronic gains and losses in thin film photovoltaics （PC） technologies and, as a result, the underlying performance limitations. In fact, optical losses that occur when above-bandgap photons are not absorbed in the active layers can be distinguished from electronic losses when electron-hole pairs generated in the active layers are not collected. This overall methodology has been applied to copper indium-gallium diselenide （Culn1-xGaxSe2; CIGS） solar cells, a key commercialized thin film PV technology. CIGS solar cells with both standard thickness （〉2 μm） and thin （〈1 μm） absorber layers are studied by applying SE to obtain inputs for EQE simulations and enabling comparisons of simulated and measured EQE spectra. SE data analysis is challenging for CIGS material components and solar cells because of the need to develop an appropriate （ε1, ε2） database for the CIGS alloys and to extract absorber layer Ga profiles for accurate structural/compositional models. For cells with standard thickness absorbers, excellent agreement is found between the simulated and measured EQE, the latter under the assumption of 100% collection from the active layers, which include the CIGS bulk and CIGS/CdS heterojunction inter

关键词： Solar cells Thin-film Ellipsometry Spectroscopic Culn1-xGaxSe2(CIGS) Optical properties Quantum efficiency External Simulation Solar-cell

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Characteristics of gastric cancer in Asia

引用

World Journal of Gastroenterology 2014年第16期20卷 4483-4490页

作者： Rubayat rahman Akwi W Asombang Jamal a.ibdah Division of Gastroenterology and Hepatology University of Missouri School of MedicineOne Hospital DriveColumbiaMO 65212United States

Gastric cancer(GC)is the fourth most common cancer in the world with more than 70%of cases occur in the developing *** than 50%of cases occur in Eastern *** is the second leading cause of cancer death in both sexes *** Asia,GC is the third most common cancer after breast and lung and is the second most common cause of cancer death after lung *** the incidence and mortality rates are slowly declining in many countries of Asia,GC still remains a significant public health *** incidence and mortality varies according to the geographic area in *** variations are closely related to the prevalence of GC risk factors;especially Helicobacter pylori(***)and its molecular virulent *** gradual and consistent improvements in socioeconomic conditions in Asia have lowered the *** seroprevalence rates leading to a reduction in the GC ***,GC remains a significant public health and an economic burden in *** has been no recent systemic review of GC incidence,mortality,and *** molecular epidemiology in *** aim of this report is to review the GC incidence,mortality,and linkage to *** in Asia.

关键词： Gastric cancer Asia Epidemiology Gastric cancer incidence Gastric cancer mortality

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Gastric cancer in Africa:Current management and outcomes

引用

World Journal of Gastroenterology 2014年第14期20卷 3875-3879页

作者： Akwi W Asombang Rubayat rahman Jamal a.ibdah Division of Gastroenterology and Hepatology University of MissouriColumbia

Gastric cancer is the fourth most common cancer and second most common cause of cancer death worldwide. Globally, gastric cancer poses a significant public health burden - both economically and socially. In 2008, the economic burden from premature cancer deaths and disability was $895 billion and gastric cancer was the second highest cancer responsible for healthy life lost. With the expected increase in cancer deaths and non-communicable diseases, these costs are expected to rise and impact patient care. World Health Organization, estimates a 15% increase in non-communicable disease worldwide, with more than 20% increase occurring in Africa between 2010 and 2020. Mali, West Africa, is ranked 15th highest incidence of gastric cancer worldwide at a rate of 20.3/100000, yet very scarce published data evaluating etiology, prevention or management exist. It is understood that risk factors of gastric cancer are multifactorial and include infectious agents (Helicobacter pylori, Epstein-Barr virus), genetic, dietary, and environmental factors (alcohol, smoking). Interestingly, African patients with gastric cancer are younger, in their 3rd-4th decade, and present at a late stage of the disease. There is sparse data regarding gastric cancer in Africa due to lack of data collection and under-reporting, which impacts incidence and mortality rates. Currently, GLOBOCAN, an International Agency for Research on Cancer resource, is the most comprehensive available resource allowing comparison between nations. In resource limited settings, with already restricted healthcare funding, data is needed to establish programs in Africa that increase gastric cancer awareness, curtail the economic burden, and improve patient management and survival outcomes.

关键词： Gastric cancer Africa Cancer outcomes Cancer survival Cancer management Non-communicable diseases

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Liver diseases in pregnancy: Diseases not unique to pregnancy

引用

World Journal of Gastroenterology 2013年第43期19卷 7630-7638页

作者： Ashraf A Almashhrawi Khulood T Ahmed Rubayat N rahman Ghassan M Hammoud Jamal a.ibdah Division of Gastroenterology and Hepatology University of MissouriColumbiaColumbiaMO 65212United States

Pregnancy is a special clinical state with several normal physiological changes that influence body organs including the *** disease can cause significant morbidity and mortality in both pregnant women and their *** challenges arise in reaching an accurate diagnosis in light of such physiological *** test results should be carefully interpreted and the knowledge of what normal changes to expect is prudent to avoid clinical *** challenges entail the methods of treatment and their safety for both the mother and the *** review summarizes liver diseases that are not unique to *** focus on viral hepatitis and its mode of transmission,diagnosis,effect on the pregnancy,the mother,the infant,treatment,and *** hepatitis,primary biliary cirrhosis,primary sclerosing cholangitis,Wilson’s disease,Budd Chiari and portal vein thrombosis in pregnancy are also *** is rare in patients with cirrhosis because of the metabolic and hormonal changes associated with *** bleeding can happen in up to 38%of cirrhotic pregnant *** of portal hypertension during pregnancy is *** increases the pathogenicity leading to an increase in the rate of *** discuss some of the interventions for gallstones in pregnancy if symptoms ***,we provide an overview of some of the options in managing hepatic adenomas and hepatocellular carcinoma during pregnancy.

关键词： Liver Pregnancy Viral hepatitis Autoimmune Cirrhosis Gallstones Adenoma

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Acute fatty liver of pregnancy:An update on pathogenesis and clinical implications

引用

World Journal of Gastroenterology 2006年第46期12卷 7397-7404页

作者： Jamal a.ibdah Division of Gastroenterology School of Medicine University of Missouri at Columbia One Hospital Drive Columbia Missouri 65212 United States

Acute fatty liver of pregnancy (AFLP) is a serious maternal illness occurring in the third trimester of pregnancy with significant perinatal and maternal mortality. Till recently, it has been considered a mysterious illness. In this editorial, we review the recent advances in understanding the pathogenesis of AFLP and discuss the studies documenting a fetal-maternal interaction with a causative association between carrying a fetus with a defect in mitochondrial fatty acid oxidation and development of AFLP. Further, we discuss the impact of these recent advances on the offspring born to women who develop AFLP, such that screening for a genetic defect can be life saving to the newborn and would allow genetic counseling in subsequent pregnancies. The molecular basis and underlying mechanism for this unique fetal-maternal interaction causing maternal liver disease is discussed.

关键词： Acute fatty liver of pregnancy HELLP syndrome Mitochondrial Trifunctional Protein Mitochondrialfatty acid oxidation

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Sirtuins and nonalcoholic fatty liver disease

引用

World Journal of Gastroenterology 2016年第46期22卷 10084-10092页

作者： Fatiha Nassir Jamal a.ibdah Research Service Harry S Truman Memorial VA Hospital University of Missouri Department of Medicine Division of Gastroenterology and Hepatology University of Missouri

Mammalian sirtuins are seven members belonging to the silent information regulator 2 family, a group of Class Ⅲ histone/protein deacetylases. Sirtuins(SIRT 1-7) have different subcellular localization and function and they regulate cellular protein function through various posttranslational modifications. SIRT1 and 3, the most studied sirtuins, use the product of cellular metabolism nicotinamide adenine dinucleotide as a cofactor to post-translationally deacetylate cellular proteins and consequently link the metabolic status of the cell to protein function. Sirtuins have been shown to play a key role in the development and rescue of various metabolic diseases including non-alcoholic fatty liver disease(NAFLD). NAFLD is currently the most chronic liver disease due mainly to high-calorie consumption and lower physical activity. No pharmacological approach is available to treat NAFLD, the current recommended treatment are lifestyle modification such as weight loss through calorie restriction and exercise. Recent studies have shown downregulation of sirtuins in human as well as animal models of NAFLD indicating an important role of sirtuins in the dynamic pathophysiology of NAFLD. In this review, we highlight the recent knowledge on sirtuins, their role in NAFLD and their unique potential role as novel therapeutic target for NAFLD treatment.

关键词： SIRT1 SIRT3 Sirtuins Non-alcoholic fatty liver disease

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Role of mitochondria in alcoholic liver disease

引用

World Journal of Gastroenterology 2014年第9期20卷 2136-2142页

作者： Fatiha Nassir Jamal a.ibdah Division of Gastroenterology and Hepatology Department of Internal Medicine University of Missouri School of Medicine Columbia MO 65212 United States

Alcohol abuse is the leading cause of liver related morbidity and *** or binge alcohol drinking causes hepatic steatosis which can develop to steatohepatitis,cirrhosis and ultimately hepatocellular *** pathogenesis of alcoholic liver disease(ALD)is poorly characterized,however several recent studies point to a major role of mitochondria in this *** play a crucial role in cellular energy metabolism and in reactive species *** treatment causes mitochondrial DNA damage,lipid accumulation and oxidative *** in both animal models and in humans showed that alcohol administration causes changes in the mitochondrial morphology and function suggesting a role of these changes in the pathogenesis of *** review recent findings on mechanisms by which alcohol negatively impacts mitochondrial biogenesis and function and we will discuss the specific intracellular pathways affected by alcohol ***,recent findings indicate that a large number of mitochondrial proteins are acetylated and that mitochondrial proteins acetylation and sirtuins are modulated by ***-derstanding the mechanisms behind alcohol mediated impaired mitochondrial biogenesis and function may help identify potential therapeutic targets for treating ALD in humans.

关键词： Liver Alcoholic liver disease Mitochondria Alcohol Sirtuins

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Utility of endoscopic ultrasound in patients with portal hypertension

引用

World Journal of Gastroenterology 2014年第39期20卷 14230-14236页

作者： Ghassan M Hammoud Jamal a.ibdah Division of Gastroenterology and Hepatology University of Missouri School of Medicine Columbia MO 65212 United States

Endoscopic ultrasound(EUS) has revolutionized the diagnostic and therapeutic approach to patients with gastrointestinal disorders. Its application in patients with liver disease and portal hypertension is increasing. Patients with chronic liver disease are at risk for development of portal hypertension sequale such as ascites, spontaneous bacterial peritonitis and gastroesophageal varices. Bleeding esophageal and gastric varices are among the most common causes of mortality in patients with cirrhosis. Thus, early detection and treatment improve the outcome in this population. EUS can improve the detection and diagnosis of gastroesophageal varices and collateral veins and can provide endoscopic therapy of gastroesophageal varices such as EUS-guided sclerotherapy of esophageal collateral vessels and EUS-guided cynoacrylate(Glue) injection of gastric varices. EUS can also provide knowledge on the efficacy of pharmacotherapy of portal hypertension. Furthermore, EUS can provide assessment and prediction of variceal recurrence after endoscopic therapy and assessment of portal hemodynamics such as E-Flow and Doppler study of the azygous and portal veins. Moreover, EUS-guided fine needle aspiration may provide cytologic diagnosis of focal hepatic tumors andanalysis of free abdominal *** specialized EUSguided needle biopsy,a sample of liver tissue can be obtained to diagnose and evaluate for chronic liver ***-guided fine needle injection can be used to study portal vein pressure and hemodynamics,and potentially could be used to assist in exact measurement of portal vein pressure and placement of intrahepatic portosystemic shunt.

关键词： Endoscopic ultrasound Cirrhosis Portal hypertension Gastroesophageal varices Cyanoacrylate Hepatocellular carcinoma Fine needle aspiration

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Non-alcoholic fatty liver disease and the metabolic syndrome:An update

引用

World Journal of Gastroenterology 2008年第2期14卷 185-192页

作者： R Scott Rector John P Thyfault Yongzhong Wei Jamal a.ibdah Division of Gastroenterology and Hepatology University of Missouri Columbia MO 65212 United States Division of Gastroenterology and Hepatology Harry S. Truman Memorial Veterans Medical Center andDepartments of Nutritional Sciences University of MissouriColumbia MO 65212 United States Division of Gastroenterology and Hepatology Harry S. Truman Memorial Veterans Medical Center Universityof Missouri Columbia MO 65212 United States Division of Gastroenterology and Hepatology Harry S. Truman Memorial Veterans Medical Center andDepartments of Medical Pharmacology and PhysiologyUniversity of Missouri Columbia MO 65212 United States

Sedentary lifestyle and poor dietary choices are leading to a weight gain epidemic in westernized countries, subsequently increasing the risk for developing the metabolic syndrome and nonalcoholic fatty liver disease (NAFLD). NAFLD is estimated to affect approximate 30% of the general US population and is considered the hepatic manifestation of the metabolic syndrome. Recent findings linking the components of the metabolic syndrome with NAFLD and the progression to nonalcoholic steatohepatitis (NASH) will be reviewed; in particular, the role of visceral adipose tissue, insulin resistance, and adipocytokines in the exacerbation of these conditions. While no therapy has been proven effective for treating NAFLD/NASH, common recommendations will be discussed.

关键词： Nonalcoholic fatty liver disease Metabolic syndrome Insulin resistance Cytokines Inflammation

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Role of the JNK signal transduction pathway in inflammatory bowel disease

引用

World Journal of Gastroenterology 2008年第2期14卷 200-202页

作者： Praveen K Roy Farzana Rashid Jack Bragg Jamal a.ibdah Division of Gastroenterology and Hepatology University of Missouri School of Medicine Columbia Missouri United States

The c-Jun NH2-terminal Kinase (JNK) pathway representsone sub-group of the mitogen-activated protein (MAP)kinases which plays an important role in variousinflammatory diseases states, including inflammatorybowel disease (IBD). Significant progress towardsunderstanding the function of the JNK signaling pathwayhas been achieved during the past few years. Blockadeof the JNK pathway with JNK inhibitors in animal modelsof IBD lead to resolution of intestinal *** data suggest specific JNK inhibitors hold promiseas novel therapies in IBD.

关键词： JNK pathway Inflammatory bowel disease Inflammation

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：