提升领导干部的“微素养”须把握“三态”

微时代来临,做好群众工作和管理工作需要领导干部提升"微素养"。领导干部要摆正"微心态"、用好"微语态"、形成"微常态",以自身媒体素养的提高增强执政为民的本领。

政务微博日常运行存在的问题及对策探析

"微时代"已经来临,政务微博作为一种新兴的网络问政、议政、参政的互动平台,成为了解民意、汇聚民智、解决政府管理疑难问题的重要载体。然而其在实际操作中也存在着规章制度不健全、微博命名认证混乱和功能定位模糊、管理者缺乏"微素养"等诸多问题,难以实现它的功能与使命。要构建微博问政良好运行机制,应出台指导性文件或规章,健全认证制度,明确微博定位,加强系统建设,提高管理者"微素养",组建专业运营团队,以更好地发挥微博问政的正面能量。

“微时代”下历史虚无主义的危害与对策

随着"微时代"的到来,历史虚无主义思潮沉渣泛起,它强烈的意识形态色彩引起学界的广泛关注。"微时代"下历史虚无主义的危害不容小觑,它造成人们思想上的严重混乱,对国家意识形态的安全带来一定威胁。为了积极有效地应对历史虚无主义思潮的侵蚀,应采取切断"微信息"传播途径、加强"微"学者队伍建设、提高网民的"微"素养等措施,帮助人们树立正确的历史观、人生观。

Analysis of Soil Degradation Causes in Orchards with Different Planting Years

The aim was to analyze effects of jujube planting years on changes of soil nutrient elements and explore the causes of orchard degradation by researching variation characteristics of soil nutrient contents in orchards with different planting years, providing theoretical support for the soil degradation of jujube or-chards. [Method] Soil samples were col ected in depth at 0-20 and 20-40 cm from the sites in or out of tree canopy scope in jujube orchards with 3, 5 and 7 plan-ning-years, to analyze contents of available N, P and K, organic matter, total N, salts, and trace elements, as wel as changes of nutritional elements. [Result] Avail-able boron, copper, iron, manganese, zinc and available potassium in soils of jujube orchards with 3, 5 and 7 years planting history reduced as planting year increased, which coincided with that in the soil of 20-40 cm. [Conclusion] Because trace ele-ments are never applied in southern Xinjiang, available B, Cu, Fe, Mn, and Zn and available K would be consumed by tree root growth. Due to root distribution differ-ences and ploughing effects in fields, the contents of nutrients tend to be volatile in or out of tree canopy scope. Tree root in deeper soils absorbs more nutrients, and soil nutrients would decrease dramatical y if additional chemical fertilizers are not provided, leading to soil degradation.

Distribution of dissolved cadmium in Prydz Bay,Antarctica

In order to better understand the spatial and temporal distribution of dissolved cadmium in Prydz Bay, east Antarctica, seawaters were sampled by CTD during the CHINARE-25 cruise （Oct. 2008 - Apr. 2009） and the concentrations of cadmium were analyzed by AAS （Atomic Absorption Spectrometry） in the clean laboratory. Together with the data of macronutrients and chl.a from the same cruise, the relationship between cadmium and biological process was studied. The results showed that the concentrations of Cd in the surface water had a good relationship with chl.a and biologicl process was the important factor that influenced the distribution of dissolved Cd in the surface water. Linear relationship was found between dissolved Cd and phosphate in the surface water and the high ratio of Cd/P at the edge of ice shelf was most probably due to ice melting, vertical distribution of Cd was similar to those of macronutrient such as phosphate and was affected by decomposition of organic particals. The temporal change of dissolved Cd in upper layer was slight and tide probably had influence on the change.

Available Contents of Trace Nutrient Element and Factors Affecting Their Availability in Western Jilin

Based on the assay of the total content and available content of the trace nutrient elements and the soil pH and organic matter of the soil samples,the characteristic of the available content of the trace nutrient elements and their affecting factors are studied. The results show that the available B in western Jilin is in a middle level,the content in Nong'an is higher than that in the others; the available Mn is extremely abundant; the available Cu in Nong'an is obviously higher than other areas,and the content in Da'an differs greatly; the available Zn is in a middle level; the severe shortage of available Mo differs between different areas; and the available Fe is extremely abundant. The available Mn,Cu and Fe have significantly positive correlation with their total content; the available B has significantly positive correlation with pH,and Zn has obviously negative correlation with pH; the available Mn and Fe had significantly positive correlation with soil organic matter.

Mechanisms of heme iron absorption:Current questions and controversies

Iron is a critical micronutrient, and iron derived from heme contributes a large proportion of the total iron absorbed in a typical Western diet. Heme iron is absorbed by different mechanisms than non-heme iron, but despite considerable study over many years these mechanisms remain poorly understood. This review provides an overview of the importance of heme iron in the diet and discusses the two prevailing hypotheses of heme absorption; namely receptor mediated endocytosis of heme, and direct transport into the intestinal enterocyte by recently discovered heme transporters. A specific emphasis is placed on the questions surrounding the site of heme catabolism and the identity of the enzyme that performs this task. Additionally, we present the hypothesis that a non-heme iron transport protein may be required for heme iron absorption and discuss the experiences of our laboratory in examining this hypothesis.

Helicobacter pylori infection and micronutrient deficiencies

It is known that deficiencies of micronutrients due to infections increase morbidity and mortality.This phenomenon depicts itself conspicuously in developing countries. Deficiencies of iron,vitamins A,E,C,B12,etc are widely prevalent among populations living in the third world countries.Helicobacter pylori(H pylori)infection has a high prevalence throughout the world.Deficiencies of several micronutrients due to H pylori infection may be concomitantly present and vary from subtle sub-clinical states to severe clinical disorders.These essential trace elements/ micronutrients are involved in host defense mechanisms, maintaining epithelial cell integrity,glycoprotein synthesis, transport mechanisms,myocardial contractility,brain development,cholesterol and glucose metabolism.In this paper H pylori infection in associaed with various micronutrients deficiencies is briefly reviewed.

An update on iron physiology

Iron is an essential micronutrient, as it is required for adequate erythropoietic function, oxidative metabolism and cellular immune responses. Although the absorption of dietary iron (1-2 mg/d) is regulated tightly, it is just balanced with losses. Therefore, internal turnover of iron is essential to meet the requirements for erythropoiesis (20-30 mg/d). Increased iron requirements, limited external supply, and increased blood loss may lead to iron deficiency (ID) and iron-deficiency anemia. Hepcidin, which is made primarily in hepatocytes in response to liver iron levels, inflammation, hypoxia and anemia, is the main iron regulatory hormone. Once secreted into the circulation, hepcidin binds ferroportin on enterocytes and macrophages, which triggers its internalization and lysosomal degradation. Thus, in chronic inflammation, the excess of hepcidin decreases iron absorption and prevents iron recycling, which results in hypoferremia and iron-restricted erythropoiesis, despite normal iron stores (functional ID), and anemia of chronic disease (ACD), which can evolve to ACD plus true ID (ACD + ID). In contrast, low hepcidin expression may lead to iron overload, and vice versa. Laboratory tests provide evidence of iron depletion in the body, or reflect iron-deficient red cell production. The appropriate combination of these laboratory tests help to establish a correct diagnosis of ID status and anemia.

Soil Nutrient Distribution in Two Typical Paddy Terrace Wetlands Along an Elevation Gradient During the Fallow Period

Soil nutrient concentrations in the top soils from two paddy terraces were determined in order to investigate spatial distributions of soil nutrients along the elevations on the Yunnan plateau of China during the fallow period.Results showed that soil nutrients in both terraces were higher than the reference concentrations except for SOC,TN,TP and Fe.Soil macronutrients didn't show significant differences in both terraces except for Mg and Ca,so did soil micronutrients except for Mn.Spatial distribution patterns of soil nutrients along the increasing elevations were different in both terraces.However,soil nutrients in both terraces were generally not significantly influenced by the elevations and soil pH values.The findings of this study can contribute to soil fertility management and ecological protection of Hani terraces.

Nutraceutical Effect of Cuetlas （Arsenura armida C.） Edible Insects as Local Food at Ixcaquixtla, Mexico

Insect＇s nutrient composition may provide a good source of macro- and micro-nutrients with nutraceutical functions that could help people from semirural areas, such as Ixcaquixtla, located southeast of the Puebla State, Mexico. The aim of this study was to assess macro- and micro-nutrients in Cuetlas （Arsenura armada C.） larvae and inform local people about the nutraceutical benefits that those insects could provide. Cuetlas larvae samples were collected from Jonote tree on August, 2014 to analyze minerals and macro-nutrient of raw larvae according to AOAC （1995） techniques. Results showed that Cuetlas larvae contained 56.93% proteins, 14.76% lipids, 2.95% minerals, 2.13% fiber and 23.23% soluble carbohydrates. Cuetlas larvae have a good amount of proteins, essential macromolecules for human life as well as essential fatty acids that are important sources of fuel for brain cells and in particular for cardiac and skeletal muscle, minerals, not determined individually, which are important for metabolism processes, fiber for digestive processes and soluble carbohydrates as energy source.

Obtaining Cheese with Milk Mixture and Inca Peanut （Plukenetia Volubilis）

The Inca peanut, a plant native to the Peruvian Amazon, has an important nutritional contribution to 53% oil and 33% protein [ 1, 2], high content of Omega 3 and 6, Vitamin E. Recent research suggests the nutritional and therapeutic significance of consumption for the control of free radicals [3], being an alternative food to reduce nutritional deficiencies of macro and micronutrients in the diet. The results show that the cheese made from a mixture of milk and Inca peanut （70：20 v/v） 0.15 M of Ca sulphate is of firm consistency, with a clotting time of 9 min and yields 14.56% at 80 ℃, is similar to fresh milk cheese sensory characteristics determined by the test of acceptability. Respect to nutrition cheeses present values of protein and fat （16.3% and, 25.05%, respectively）. Sensory evaluation process cheese 70：30 v/v showed an acceptance of 67% relative to a commercial cheese. The texture profile of the finished product, applying a deformation of 30%, have hardness values for 1.88 N, elasticity 0.08, cohesiveness 0.86, adhesiveness 0.36, gumminess 1.62 and chewiness 0.13.

Research Progress of Special Wheat Nutrition Components and Application

With the increased pace of life and improved consumption level of people, the demand for food developed from natural resources is increasing day by day. Related researches have shown that the nutrition level of special wheat is higher than that of common wheat. Special wheat can improve the nutritional structure and diet quality of people. However, the researches on special wheat are rare at home and abroad. Compared with the common wheat, special wheat still faces many challenges in taste quality, storage stability, processing suitability as main food, etc. This paper summarized the researches on analysis and application of special wheat nutrition components at home and abroad so as to evaluate comprehensively the development prospect of special wheat.

Nutrients and Trace Elements in a Pig Farm in Beijing： Chinese and German Recommendations

Emergence of Chinese economy together with the current Livestock Revolution in Asia have led to an increase of meat demands, specially pork that is reflected in the growth of commercial pig farms in peri-urban areas of Beijing, capital of People＇s Republic of China. In the framework of the International Research Training Group and of the Sino-Project Recycling of Organic Residues from Agricultural and Municipal Origin in China, the status quo of a large pig farm is researched. The first phase of the project was focused on a detailed description of the nutrients and trace elements contained in the main inputs （water, feed） and outputs （manure, wastewater） of the pig farm. The compliance with the Chinese national standards or often referred to as GB standards （in Chinese ＂GuoBiao＂） and, current German recommendations were included. The analysis of nutrients and trace minerals followed the natural structure of the pig life cycle, i.e., gestation, farrowing, weaning and fattening. The main results showed that the pig drinking water met the recommendations for livestock drinking water, ground water and human drinking water. Concentrations of Zn, Cu, Mn and As in the pig feeds samples displayed higher values compared to the Chinese and German recommendations. Average values of trace elements in the pig manure did not surpass the Chinese and German recommendations of biowastes, however, some manure samples showed excessive concentrations of Cd, Cu and Zn. Likewise, Pb, Cd, Cr, Cu and Zn concentrations in the wastewater surpassed the recommendations for irrigation water.

Microbial profile and antibiotic sensitivity pattern in bile cultures from endoscopic retrograde cholangiography patients

AIM： To identify the frequency of bacterial growth, the most commonly grown bacteria and their antibiotic susceptibility, and risk factors for bacterial colonization in bile collected from patients with different biliary dis- eases. METHODS： This prospective study was conducted be- tween April 2010 and August 2011. Patients with vari- ous biliary disorders were included. Bile was aspirated by placing a single-use, 5F, standard sphincterotome catheter into the bile duct before the injection of con- trast agent during endoscopic retrograde cholangio- pancreaticography （ERCP）. Bile specimens were trans- ported to the microbiology laboratory in blood culture bottles within an anaerobic transport system. Bacteria were cultured and identified according to the standard protocol used in our clinical microbiology laboratory. The susceptibilities of the organisms recovered were identified using antimicrobial disks, chosen according tothe initial gram stain of the positive cultures RESULTS： Ninety-one patients （27% male, mean age 53.7 4- 17.5 years, range： 17-86 years） were included in the study. The main indication for ERCP was benign biliary disease in 79 patients and malignant disease in 12 patients. The bile culture was positive for bacterial growth in 46 out of 91 （50.5%） patients. The most frequently encountered organisms were Gram-negative bacteria including Escherich/a coli （28.2%）, Pseudo- monas （17.3%） and Stenotrophomonas rnaltophilia （15.2%）. There were no significant differences between patients with malignant and benign disease （58% vs 49%, P = 0.474）, patients with acute cholangitis and without acute cholangitis （52.9% vs 50%, P = 0.827）, patients who were empirically administered antibiotics before intervention and not administered （51.4% vs 60.7%, P = 0.384）, with regard to the bacteriobilia. We observed a large covering spectrum or low resistance to meropenem, amikacin and imipenem. CONCLUSION： We did not find a significant risk fac- tor for bacteriobilia in patients with biliary obstruction. A bile sample for microbiological analysis may become a valuable diagnostic tool as it leads to more accurate selection of antibiotics for the treatment of cholangitis.

Micronutrient Contents of Citrus Orchard Soils in Southern China

Investigations were carried out on the micronutrient contents,of major citrus orchard soils (involving seven soil great groups in 8 provinces and an autonomous region of southern China),and an evaluation on the abundance and deficiency of available micronutrients in these soils was made in this paper.In southern China,citrus orchard soils derived from sandstone,sandy shale,Quaternary red clay,diluvial deposit,granite gneiss and neritic deposit were deficient in available Mo and B and low in Zn.Those developed on purple sandy shale,limestone and slope deposit were all in short supply of available Zn,B and Mo.Coastal solonchak was fairly abundant in B,but its available Fe,Zn and Mo contents were rather low.

Effect of Manure on Distribntion of Micronutrients in Rhizosphere of Wheat

A rhizobox system was used to determine the distribution of micronutrients (Fe, Mn, Cu and Zn) acrossthe rhmosphere of wheat (Triticum aestivum). The available contents of Fe and Mn in the rhizosphere wereraised by addition of manure or chemical fertilizer combined with manure, but those of Cu and Zn werehardly affected, which might be an important reason why manure addition could improve the Fe and Mnnutrition status of plants. Several possible mechanisms for the increase of the availabilities of Fe and Mn inthe rhizosphere due to manuring are discussed as well.

Multi-micronutrient Fortified Beverage Delivered through the School-Based System Improved Iron Status and Test Scores of Children

Fortifying commonly consumed foods and beverages offers a great opportunity of filling the nutrient gap between actual and the needed nutrient intakes of young children. Ready-to-drink beverage as a vehicle for fortification is easy to administer, more consistent and least obstructive, because it can be consumed without further processing/cooking. This study aimed to evaluate the effectiveness of fortified beverage on the improving of iron status and school performance test of schoolchildren. About 5,000 schoolchildren aged 6-12 years old from 19 schools in Quirino province, Philippines were invited to participate in the study. Samples of 4,875 children with parental consent were screened for hemoglobin and serum ferritin levels. About 4,495 children had complete participation in the school performance test, which were developed and administered by school supervisors. Children were fed 200 mL ready-to-drink juice fortified with iron, zinc, lysine, vitamins A and C for 120 d. The beverage was delivered through the baseline. At end of the intervention, only 1,050 children had complete data set and the anemia rate reduced from 100% to 60%. Iron deficiency has increased insignificantly from 3.6% to 4.5%. Mean percentage of test scores increased significantly between base and end of the study： English （40% to 60%）, math （35% to 58%） and science （32% to 58%）. In conclusion, consumption of 200 mL fortified juice drink had contributed to the reduction of anemia and increased tests scores of children.

Application of Neutron Activation Analysis Technique for the Analysis of Soil Samples from Farmlands of Yebrage Hawariat, East Gojjam, Ethiopia

Farmers may not be conscious for their farmland＇s nutrients, soil organic matter, water and air because they simply concerned only for their labor availability and soil fertility losses. The composition and proportion of these components greatly influence soil physical properties, including texture, structure and porosity, the fraction of pore space in a soil. The soil of this farmland must be able to supply adequate amount of plant nutrients, in forms which can be absorbed by the crop, within its lifespan. Deficiencies or imbalances in the supply of any of essential elements can compromise growth, affecting root development, cell division, crop quality, crop yield and resistance to disease and drought. This study was conducted to fill this knowledge gap in order to develop economically vital and environmentally accepted nutrient management strategies for the use of soils in agricultural lands. The objective of this study is to assess the elemental contents and concentration of soil samples collected from farmlands of ＂Yebrage＂ using neutron activation analysis （NAA） techniques regardless of oxidation state, chemical form or physical locations. NAA is used to determine the elemental composition and concentrations present in a soil. The macro/micronutrient and organic matter deficiencies have been verified in agricultural soils through increased use of soil testing and plant analysis. The challenge for agriculture over the coming decades will meet the world＇s increasing demands for food in a sustainable way. Current issues and future challenges point out that as long as agriculture remains a soil based industry, major decreases in productivity likely to be attained ensuring that plants do not have adequate and balanced supply of nutrients.

Effect of Phosphorus Level on the Availability of Some Micronutrients in a Vertic Argiudoll Soil under No-Tillage System in Argentina

There are interactions between phosphorus （P） and some micronutrients which can affect their availability if P is applied as a fertilizer in high concentrations. There are many mechanisms of interactions between P and micronutrients and changes in pH values caused by phosphate fertilization is one of them. These interactions between nutrients might be more pronounced under a no-tillage system which produces stratification and accumulation of few mobile nutrients as P in the surface horizons due to the lack of soil removement. The objectives of this study were： （1） to evaluate the effect of P concentration on the availability ofCu, Zn, Fe and Mn in soil under no-tillage system; （2） to produce maps of nutrients availability and to analyze whether an interaction between nutrients spatial distribution exists. The study was carried out in Parana, province of Entre Rios, in a soil classified as Vertic Argiudol in two consecutive growing seasons （2006 and 2007）. A plot of 1 （one） hectare under no-tillage system with a double-cropped wheat-soybean rotation in sequence （soybean sowing after wheat harvest） was sampled by the grid methods. The results of this study suggest which tillage regime and phosphate fertilization increased P levels in superficial horizons and this produced a negative relationship between micronutrients and P. Regarding the nutrients map distributions, the negative interaction between P and micronutrients was clearly seen in the case ofFe_ Mn and Zn.