keyword
MENU ▼
Read by QxMD icon Read
search

system change

keyword
https://www.readbyqxmd.com/read/29692079/-characteristics-of-temporal-spatial-differentiation-in-landscape-pattern-vulnerability-in-nansihu-lake-wetland-china
#1
Jia Xin Liang, Xin Ju Li
With remote sensing images from 1985, 2000 Lantsat 5 TM and 2015 Lantsat 8 OLI as data sources, we tried to select the suitable research scale and examine the temporal-spatial diffe-rentiation with such scale in the Nansihu Lake wetland by using landscape pattern vulnerability index constructed by sensitivity index and adaptability index, and combined with space statistics such as semivariogram and spatial autocorrelation. The results showed that 1 km × 1 km equidistant grid was the suitable research scale, which could eliminate the influence of spatial heterogeneity induced by random factors...
February 2018: Ying Yong Sheng Tai Xue Bao, the Journal of Applied Ecology
https://www.readbyqxmd.com/read/29692077/-spatial-temporal-pattern-of-sustainable-intensification-of-agricultural-land-use-in-shandong-province-china
#2
Shan Dong Niu, Xiao Lyu, Yang Yang Shi
Under the theoretical framework of sustainable intensification of agricultural land-use (SIALU), We used material flow analysis (MFA) method to establish evaluation index system for SIALU by utilizing data in 2000, 2005, 2010 and 2015 to quantify the level of SIALU of 17 cities in Shandong Province, and analyzed the variation in input-output of resources factors of agricultural land, spatial distribution of resource productivity and environmental economic efficiency, in order to reveal spatial-temporal differentiation of SIALU...
February 2018: Ying Yong Sheng Tai Xue Bao, the Journal of Applied Ecology
https://www.readbyqxmd.com/read/29692071/-physiological-and-biochemical-mechanism-of-spermidine-improving-drought-resistance-in-maize-seedlings-under-drought-stress
#3
Li Jie Li, Wan Rong Gu, Yao Meng, Yue Li Wang, Jun Yi Mu, Jing Li, Shi Wei
To explore the role of exogenous spermidine (Spd) in enhancing the resistance of maize to drought stress, 15% polyethylene glycol (PEG-6000) was used to simulate drought stress and with 'Xianyu 335' (drought-insensitive) and 'Fenghe 1' (drought sensitive) as the experiment materials, the effects of Spd (0.1 mmol·L-1 ) on the growth, photosynthetic characteristics, chlorophyll content, osmotic adjustment substance, membrane lipid peroxidation and root activity of maize seedlings were investigated. The results showed that the application of Spd significantly promoted the growth of maize seedlings under drought stress, increased chlorophyll content, net photosynthetic rate (Pn ), stomatal conductance (gs ), transpiration rate (Tr ) and water use efficiency (WUE), and decreased the enhancement of intercellular carbon dioxide concentration (Ci ) in 'Fenghe 1'...
February 2018: Ying Yong Sheng Tai Xue Bao, the Journal of Applied Ecology
https://www.readbyqxmd.com/read/29692066/-effects-of-inorganic-carbon-supplies-and-light-on-photosynthetic-functions-of-pyropia-haitanensis
#4
Heng Jiang, Ding Hui Zou, Wen Yong Lou
The increasing stocking density of algal often results in lowered carbon and light levels. In this study, Pyropia haitanensis were cultured under four different conditions, i.e., 390 μL·L-1 (ambient carbon supply) + ambient sunlight, 20 μL·L-1 (decreased carbon supply) + ambient sunlight, 390 μL·L-1 + decreased sunlight (20% of ambient sunlight), 20 μL·L-1 + decreased sunlight. The activity of carbonic anhydrase (CA), photosynthetic rate and quantum efficiency of open photosynthetic system 2 (Fv '/Fm ') of the algae under different temperatures were measured to investigate the effects of decreased carbon supply and lowered light on photosynthetic functions of P...
February 2018: Ying Yong Sheng Tai Xue Bao, the Journal of Applied Ecology
https://www.readbyqxmd.com/read/29692044/-review-of-lime-carbon-sink
#5
Li Li Liu, Jiang Hua Ling, Li Tie, Jiao Yue Wang, Long Fei Bing, Feng Ming Xi
Under the background of "missing carbon sink" mystery and carbon capture and storage (CCS) technology development, this paper summarized the lime material flow process carbon sink from the lime carbonation principles, impact factors, and lime utilization categories in chemical industry, metallurgy industry, construction industry, and lime kiln ash treatment. The results showed that the lime carbonation rate coefficients were mainly impacted by materials and ambient conditions; the lime carbon sink was mainly in chemical, metallurgy, and construction industries; and current researches focused on the mechanisms and impact factors for carbonation, but their carbon sequestration calculation methods had not been proposed...
January 2018: Ying Yong Sheng Tai Xue Bao, the Journal of Applied Ecology
https://www.readbyqxmd.com/read/29692018/-spatial-temporal-variations-of-spring-maize-potential-yields-in-a-changing-climate-in-northeast-china
#6
Zhi Juan Liu, Xiao Guang Yang, Shuo Lyu, Jing Wang, Xiao Mao Lin
Based on meteorological data, agro-meteorological observations, and agricultural statistical data in Northeast China (NEC), by using the validated Agricultural Production System sIMulator (APSIM-maize), the potential, attainable, potential farmers' and actual farmers' yields of spring maize during the period 1961 to 2015 were analyzed, and the effects of climate variation on maize potential yield in NEC were quantified. Results indicated that the potential yield of spring maize was 12.2 t·hm-2 during the period 1961 to 2015, with those in northeast being lower than southwest within the study region...
January 2018: Ying Yong Sheng Tai Xue Bao, the Journal of Applied Ecology
https://www.readbyqxmd.com/read/29691969/obesity-and-the-food-system-transformation-in-latin-america
#7
REVIEW
B M Popkin, T Reardon
The Latin America and the Caribbean (LAC) region faces a major diet-related health problem accompanied by enormous economic and social costs. The shifts in diet are profound: major shifts in intake of less-healthful low-nutrient-density foods and sugary beverages, changes in away-from-home eating and snacking and rapid shifts towards very high levels of overweight and obesity among all ages along with, in some countries, high burdens of stunting. Diet changes have occurred in parallel to, and in two-way causality with, changes in the broad food system - the set of supply chains from farms, through midstream segments of processing, wholesale and logistics, to downstream segments of retail and food service (restaurants and fast food chains)...
April 24, 2018: Obesity Reviews: An Official Journal of the International Association for the Study of Obesity
https://www.readbyqxmd.com/read/29691958/brain-based-treatment-a-new-approach-or-a-well-forgotten-old-one
#8
Vanya Matanova, Zlatomira Kostova, Martin Kolev
For a relatively long period of time, mental functioning was mainly associated with personal profile while brain functioning went by the wayside. After the 90s of the 20th century, or the so called "Decade of the Brain", today, contemporary specialists work on the boundary between fundamental science and medicine. This brings neuroscience, neuropsychology, psychiatry, and psychotherapy closer to each other. Today, we definitely know that brain structures are being built and altered thanks to experience...
April 24, 2018: Journal of Evaluation in Clinical Practice
https://www.readbyqxmd.com/read/29691945/altered-intra-and-inter-network-functional-coupling-of-resting-state-networks-associated-with-motor-dysfunction-in-stroke
#9
Zhiyong Zhao, Jie Wu, Mingxia Fan, Dazhi Yin, Chaozheng Tang, Jiayu Gong, Guojun Xu, Xinjie Gao, Qiurong Yu, Hao Yang, Limin Sun, Jie Jia
Motor functions are supported through functional integration across the extended motor system network. Individuals following stroke often show deficits on motor performance requiring coordination of multiple brain networks; however, the assessment of connectivity patterns after stroke was still unclear. This study aimed to investigate the changes in intra- and inter-network functional connectivity (FC) of multiple networks following stroke and further correlate FC with motor performance. Thirty-three left subcortical chronic stroke patients and 34 healthy controls underwent resting-state functional magnetic resonance imaging...
April 24, 2018: Human Brain Mapping
https://www.readbyqxmd.com/read/29691902/3d-printed-functional-and-biological-materials-on-moving-freeform-surfaces
#10
Zhijie Zhu, Shuang-Zhuang Guo, Tessa Hirdler, Cindy Eide, Xiaoxiao Fan, Jakub Tolar, Michael C McAlpine
Conventional 3D printing technologies typically rely on open-loop, calibrate-then-print operation procedures. An alternative approach is adaptive 3D printing, which is a closed-loop method that combines real-time feedback control and direct ink writing of functional materials in order to fabricate devices on moving freeform surfaces. Here, it is demonstrated that the changes of states in the 3D printing workspace in terms of the geometries and motions of target surfaces can be perceived by an integrated robotic system aided by computer vision...
April 25, 2018: Advanced Materials
https://www.readbyqxmd.com/read/29691821/mimetic-hierarchical-approaches-for-osteochondral-tissue-engineering
#11
Ivana Gadjanski
In order to engineer biomimetic osteochondral (OC) construct, it is necessary to address both the cartilage and bone phase of the construct, as well as the interface between them, in effect mimicking the developmental processes when generating hierarchical scaffolds that show gradual changes of physical and mechanical properties, ideally complemented with the biochemical gradients. There are several components whose characteristics need to be taken into account in such biomimetic approach, including cells, scaffolds, bioreactors as well as various developmental processes such as mesenchymal condensation and vascularization, that need to be stimulated through the use of growth factors, mechanical stimulation, purinergic signaling, low oxygen conditioning, and immunomodulation...
2018: Advances in Experimental Medicine and Biology
https://www.readbyqxmd.com/read/29691745/identification-of-phytotoxins-in-different-plant-parts-of-brassica-napus-and-their-influence-on-mung-bean
#12
Azhar Mehmood, Muhammad Naeem, Farhan Khalid, Yousaf Saeed, Tasawer Abbas, Khawar Jabran, Muhammad Aqeel Sarwar, Asif Tanveer, Muhammad Mansoor Javaid
Plants in Brassica genus have been found to possess strong allelopathic potential. They may inhibit seed germination and emergence of subsequent crops following them in a rotation system. Series of laboratory and greenhouse experiments were conducted to determine the allelopathic impacts of Brassica napus L. against mung bean. We studied (1) the effects of aqueous extract (5%) of different plant parts (root, stem, leaf, flower, and whole plant) of B. napus, (2) the effects of leaf and flower extracts of B. napus at 0, 1, 2, 3, and 4% concentrations, and (3) the effect of residues of different B...
April 24, 2018: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/29691693/environmentally-relevant-concentrations-of-mercury-exposure-alter-thyroid-hormone-levels-and-gene-expression-in-the-hypothalamic-pituitary-thyroid-axis-of-zebrafish-larvae
#13
Yaling Sun, Yingwen Li, Zhihao Liu, Qiliang Chen
Mercury (Hg) is one of the most toxic heavy metals that can cause severe damage to fish. Studies have demonstrated that Hg has a specific affinity for the endocrine system, but little is known about the effects of Hg on thyroid endocrine system in fish. In this study, zebrafish embryos were exposed to environmentally relevant concentrations of 1, 4, and 16 μg/L Hg2+ (added as HgCl2 ) from 2 h post-fertilization (hpf) to 168 hpf. Thyroid hormone (TH) levels and mRNA expression levels of genes involved in the hypothalamus-pituitary-thyroid (HPT) axis were determined...
April 24, 2018: Fish Physiology and Biochemistry
https://www.readbyqxmd.com/read/29691609/effect-of-25-hydroxyvitamin-d-deficiency-and-its-interaction-with-prednisone-treatment-on-musculoskeletal-health-in-growing-mdx-mice
#14
Sung-Hee Yoon, Kim S Sugamori, Marc D Grynpas, Jane Mitchell
Duchenne muscular dystrophy (DMD) results from genetic mutations of the gene encoding dystrophin, leading to muscle inflammation and degeneration that is typically treated with glucocorticoids. DMD and its treatment with glucocorticoids result in poor bone health and high risk of fractures. Insufficient levels of 25-hydroxyvitamin D (25-hydroxy D) that may contribute to weakened bone are routinely found in DMD patients. To determine the effect of 25-hydroxy D deficiency, this study examined the effects of low vitamin D dietary intake with and without glucocorticoids on the musculoskeletal system of the Mdx mouse model of DMD...
April 24, 2018: Calcified Tissue International
https://www.readbyqxmd.com/read/29691582/-ace2-agonist-dize-alleviates-lung-injury-induced-by-limb-ischemia-reperfusion-in-mice
#15
Shu-Min Li, Xiao-Ying Wang, Fan Liu, Xiu-Hong Yang
This study was aimed to explore the effect of angiotensin converting enzyme 2 (ACE2) agonist diminazene aceturate (DIZE) on acute lung injury (ALI) induced by limb ischemia-reperfusion (LIR) in mice. Male 8-week-old wild-type and hACE2 transgenic ICR mice were randomly divided into 6 groups (6 in each group), including wild-type control (W), wild-type model (WL), wild-type model with DIZE administration (WLD), transgenic control (T), transgenic model (TL), and transgenic model with DIZE administration (TLD) groups...
April 25, 2018: Sheng Li Xue Bao: [Acta Physiologica Sinica]
https://www.readbyqxmd.com/read/29691577/-ascending-input-from-dorsal-nuclei-of-lateral-lemniscus-mediates-the-plasticity-of-inferior-colliculus-neurons-in-mice
#16
Dan-Dan Yang, Wei-Wei Zheng, Sha-Sha Zhao, Feng Luo, Xin Wang
The auditory system has the ability to adjust its structure and function as the environment changes, which is called auditory plasticity. In the auditory system, inferior colliculus (IC) is an important relay station, which accepts the ascending inputs from dorsal nuclei of lateral lemniscus (DNLL). The present study was aimed to investigate the role of the DNLL in the formation of the plasticity of IC neurons. Here, we used extracellular single unit recording and electrical stimulation to investigate the plasticity of IC neurons in Kunming mice...
April 25, 2018: Sheng Li Xue Bao: [Acta Physiologica Sinica]
https://www.readbyqxmd.com/read/29691575/-protective-effects-of-endogenous-carbon-monoxide-against-myocardial-ischemia-reperfusion-injury-in-rats
#17
Zhen Zhou, Shuang Ma, Jie Liu, Qiao-Rong Ji, Cheng-Zhu Cao, Xiao-Na Li, Feng Tang, Wei Zhang
The present study is aimed to explore the effects of endogenous carbon monoxide on the ischemia-reperfusion in rats. Wistar rats were intraperitoneally injected with protoporphyrin cobalt chloride (CoPP, an endogenous carbon monoxide agonist, 5 mg/kg), zinc protoporphyrin (ZnPP, an endogenous carbon monoxide inhibitor, 5 mg/kg) or saline. Twenty-four hours after injection, the myocardial ischemia-reperfusion model was made by Langendorff isolated cardiac perfusion system, and cardiac function parameters were collected...
April 25, 2018: Sheng Li Xue Bao: [Acta Physiologica Sinica]
https://www.readbyqxmd.com/read/29691555/-clinical-research-for-non-extraction-treatment-of-maxillary-mild-to-moderate-crowding-with-damon-technology
#18
Wei Zhang, Chuan-Jie Yan, Li Li
PURPOSE: To compare the clinical efficacy of non-extraction treatment in maxillary mild-to-moderate crowding cases with Damon self-ligating system and Roth traditional brackets. METHODS: Sixty skeletalⅠorthodontic patients were selected in this study. They were divided into DamonⅠ, RothⅠ, DamonⅡ and RothⅡ group according to the bracket species and maxillary crowding degrees. Lateral cephalometric radiographs and models were measured before and after aligning and leveling to analyze the changes in dental arch and soft and hard tissue using SPSS 19...
December 2017: Shanghai Kou Qiang Yi Xue, Shanghai Journal of Stomatology
https://www.readbyqxmd.com/read/29691386/toll-like-receptors-mediated-pathways-activate-inflammatory-responses-in-the-esophageal-mucosa-of-adult-eosinophilic-esophagitis
#19
Ángel Arias, María Vicario, David Bernardo, José M Olalla, Marina Fortea, Ana Montalban-Arques, Pilar Martínez-Fernández, Ana M González-Castro, Teresa Mota-Huertas, Laura Arias-González, Alfredo J Lucendo
OBJECTIVES: Esophageal microbiota and regulation of adaptive immunity are increasingly being investigated in eosinophilic esophagitis (EoE). Toll-like receptors (TLRs) play a central role in the initiation and maintenance of innate immune activity. Our objective was to characterize the esophageal and duodenal innate immune response in EoE and its modulation by dietary therapy. METHODS: Esophageal and duodenal biopsy samples were collected from 10 adults with untreated EoE, before and after effective treatment with a six-food elimination diet (SFED), and 10 controls with normal esophagus...
April 25, 2018: Clinical and Translational Gastroenterology
https://www.readbyqxmd.com/read/29691384/blood-transfusion-strategies-for-acute-upper-gastrointestinal-bleeding-are-we-back-where-we-started
#20
EDITORIAL
Andrew W Yen
Blood transfusion practices for acute upper gastrointestinal hemorrhage have changed over time. Restrictive strategies, which gave way to more liberal approaches for the greater part of the 20th century, have again gained traction as emerging research suggests restricting transfusion is associated with similar, or possibly better outcomes in UGI bleeding. In a large, retrospective cohort study from an integrated health care system in Taiwan, Chen, et al., report the association between early blood transfusion and clinical outcomes in patients presenting to the emergency department with UGI bleeding, and these findings are discussed in the context of current knowledge and practice...
April 25, 2018: Clinical and Translational Gastroenterology
keyword
keyword
76790
1
2
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read
×

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"