scholarly journals High Sucrose Levels and Abnormal Enzyme Activity as a Function of Nutritional Stress in Sugarcane

1969 ◽  
Vol 51 (4) ◽  
pp. 325-333
Author(s):  
Alex G. Alexander
Keyword(s):  
Nutrient Deficiency ◽  
Critical Factor ◽  
Nutritional Stress ◽  
Nutrient Supply ◽  
Oxidative Enzymes ◽  
Sand Culture ◽  
High Level ◽  
To Receive ◽  
High Sucrose ◽  
Nitrogen Phosphorus

Deficiencies of nitrogen, phosphorus, potassium, and calcium were gradually induced in sugarcane grown by sand culture. There were three objectives: 1, To determine whether nutritional stress in general is a means of inducing higher sucrose production; 2, to determine whether sucrose increases can be triggered without reaching nutrient-deficiency levels which would reduce tonnage; and 3, to ascertain whether increased sucrose production can be traced to common behavior patterns of hydrolytic and oxidative enzymes. All plants received a moderately high level of all nutrients until 14 weeks of age. Thereafter, individual nutrients were gradually lowered at intervals of 2 weeks, while control plants continued to receive the original levels. All plants subjected to nutritional stress accumulated higher leaf sucrose than control plants, regardless of the nutrient withheld. In each instance sucrose increases were recorded before nutrient supply had reached deficiency proportions. General nutritional stress thus appears to trigger variations in sugar level, with nutritional imbalance rather than actual deficiency being a critical factor. All plants under nutritional stress revealed a concurrent suppression of amylase as sucrose increased. Peroxidase was greatly stimulated by all nutritional treatments. Phosphatase was suppressed by decreasing nitrate and phosphorus, but was generally unaffected by the potassium and calcium treatments. Several distinct mechanisms of increased sucrose formation are indicated by the enzyme data. Sensitivity of amylase to changing nutrient supply is discussed from the standpoint of a possible indicator of approaching deficiency.

scholarly journals Clinical presentation of strokes confined to the insula: a systematic review of literature

2021 ◽  
Author(s):  
Vincenzo Di Stefano ◽  
Maria Vittoria De Angelis ◽  
Chiara Montemitro ◽  
Mirella Russo ◽  
Claudia Carrarini ◽  
...  
Keyword(s):  
Systematic Review ◽  
Clinical Presentation ◽  
Insular Cortex ◽  
Affective Processing ◽  
Appropriate Treatment ◽  
Insula Cortex ◽  
Atypical Presentations ◽  
High Level ◽  
To Receive ◽  
Insular Region

Abstract Background and purpose The insular cortex serves a wide variety of functions in humans, ranging from sensory and affective processing to high-level cognition. Hence, insular dysfunction may result in several different presentations. Ischemic strokes limited to the insular territory are rare and deserve a better characterization, to be quickly recognized and to receive the appropriate treatment (e.g. thrombolysis). Methods We reviewed studies on patients with a first-ever acute stroke restricted to the insula. We searched in the Medline database the keywords “insular stroke” and “insular infarction”, to identify previously published cases. Afterwards, the results were divided depending on the specific insular region affected by the stroke: anterior insular cortex (AIC), posterior insular cortex (PIC) or total insula cortex (TIC). Finally, a review of the clinical correlates associated with each region was performed. Results We identified 25 reports including a total of 49 patients (59.7 ± 15.5 years, 48% male) from systematic review of the literature. The most common clinical phenotypes were motor and somatosensory deficits, dysarthria, aphasia and a vestibular-like syndrome. Atypical presentations were also common and included dysphagia, awareness deficits, gustatory disturbances, dysautonomia, neuropsychiatric or auditory disturbances and headache. Conclusions The clinical presentation of insular strokes is heterogeneous; however, an insular stroke should be suspected when vestibular-like, somatosensory, speech or language disturbances are combined in the same patient. Further studies are needed to improve our understanding of more atypical presentations.

scholarly journals When brain damage “improves” perception: neglect patients can localize motion-shifted probes better than controls

2015 ◽  
Vol 114 (6) ◽  
pp. 3351-3358 ◽  
Author(s):  
Stefania de Vito ◽  
Marine Lunven ◽  
Clémence Bourlon ◽  
Christophe Duret ◽  
Patrick Cavanagh ◽  
...  
Keyword(s):  
Right Hemisphere ◽  
Visual Fields ◽  
Critical Factor ◽  
Significant Shift ◽  
Stimulus Motion ◽  
Attentional Processes ◽  
Position Shift ◽  
The Right ◽  
High Level ◽  
Better Than

When we look at bars flashed against a moving background, we see them displaced in the direction of the upcoming motion (flash-grab illusion). It is still debated whether these motion-induced position shifts are low-level, reflexive consequences of stimulus motion or high-level compensation engaged only when the stimulus is tracked with attention. To investigate whether attention is a causal factor for this striking illusory position shift, we evaluated the flash-grab illusion in six patients with damaged attentional networks in the right hemisphere and signs of left visual neglect and six age-matched controls. With stimuli in the top, right, and bottom visual fields, neglect patients experienced the same amount of illusion as controls. However, patients showed no significant shift when the test was presented in their left hemifield, despite having equally precise judgments. Thus, paradoxically, neglect patients perceived the position of the flash more veridically in their neglected hemifield. These results suggest that impaired attentional processes can reduce the interaction between a moving background and a superimposed stationary flash, and indicate that attention is a critical factor in generating the illusory motion-induced shifts of location.

Juggling on the line

2015 ◽  
Vol 37 (4) ◽  
pp. 459-474 ◽  
Author(s):  
Samantha Evans
Keyword(s):  
Critical Role ◽  
Case Study Research ◽  
Critical Factor ◽  
Employee Relations ◽  
Front Line ◽  
Structured Interviews ◽  
Line Managers ◽  
Content Type ◽  
Nuanced Understanding ◽  
High Level

Purpose – The purpose of this paper is to examine the interplay between the role of front line managers (FLMs) and their contribution to the reported gap between intended and actual human resource management (HRM). Design/methodology/approach – The findings draw on case study research using 51 semi-structured interviews with managers across two UK retail organisations between 2012 and 2013. Findings – This paper argues that FLMs are key agents in people management and play a critical role in the gap between intended and actual employee relations (ER) and HRM. The research found that these managers held a high level of responsibility for people management, but experienced a lack of institutional support, monitoring or incentives to implement according to central policy. This provided an opportunity for them to modify or resist intended policy and the tensions inherent in their role were a critical factor in this manipulation of their people management responsibilities. Research limitations/implications – The data were collected from only one industry and two organisations so the conclusions need to be considered within these limitations. Practical implications – Efforts to address the gap between intended and actual ER/HRM within organisations will need to consider the role tensions of both front line and middle managers. Originality/value – This research provides a more nuanced understanding of the interplay between FLMs and the gap between intended and actual HRM within organisations. It addresses the issue of FLMs receiving less attention in the HRM-line management literature and the call to research their role in the translation of policy into practice.

The Politics of Global Health Agenda Setting

2018 ◽  
pp. 324-345
Author(s):  
Stephanie L. Smith ◽  
Jeremy Shiffman
Keyword(s):  
Global Health ◽  
Agenda Setting ◽  
Single Case ◽  
Problem Definition ◽  
Future Research ◽  
Health Issues ◽  
Trade Regimes ◽  
High Level ◽  
To Receive ◽  
Health Agenda

This chapter examines the politics of global health agenda setting, the process by which global health issues come to receive attention from actors that control or influence the allocation of financial, technical, human, and other kinds of resources. It suggests that the global health agenda is shaped by the capabilities of actors, including policy entrepreneurs, high-level champions, and networks; ideas, especially those surrounding problem definition, solutions, and causal stories; powerful interests, such as the economic and security concerns of wealthy countries and industries; and institutions, such as international law and trade regimes. Most studies of global health agenda setting are of a single case, and many are descriptive. To build the field, future research should supplement these studies with comparative, theoretically grounded inquiry.

Reality from Fantasy

2010 ◽  
pp. 291-310
Author(s):  
Stephen R. Balzac
Keyword(s):  
Ethical Issues ◽  
Short Time Period ◽  
Time Period ◽  
The Right ◽  
High Level ◽  
Short Time ◽  
To Receive ◽  
Live Action ◽  
Conflicting Goals ◽  
Personal Stake

A major difficulty with teaching ethics is that it is relatively easy for participants to state the “right” thing to do when they have no personal stake in the outcome. One way of dealing with this problem is to teach ethics through engrossing, immersive, predictive scenario games in which players are forced to deal with ethical issues as they arise, where they have a personal stake in the outcome, and where there is not always a clear right answer. Predictive scenario games are a form of serious live-action roleplaying in which participants take on the roles of people involved in complex situations. In these games, knowledge of the game world is distributed among the players through overlapping and conflicting goals, and in which ethical dilemmas emerge naturally, without fanfare, much as they would in the real world. There is a high level of tension between cooperation and competition among the players. This structure creates the opportunity for players to experience the consequences of their own judgment in realistic, ethically fraught situations, to receive feedback, and to engage in constructive discussion, within a relatively short time period.

scholarly journals Nurses' Experiences of Caring for Older Persons in Transition to Receive Homecare: Being Somewhere in between Competing Values

2013 ◽  
Vol 2013 ◽  
pp. 1-9 ◽  
Author(s):  
Sigrun Hvalvik ◽  
Bjørg Dale
Keyword(s):  
Older Persons ◽  
Critical Factor ◽  
Transition Process ◽  
Competing Values ◽  
Life World ◽  
Professional Care ◽  
Excellent Care ◽  
To Receive ◽  
Insight Into ◽  
Independent Individual

Older persons in transition to need professional care in their homes will constitute a large group in municipalities in the future. The aim of this study was to obtain insight into nurses' experiences and perceptions of caring for patients in transition to receive homecare. Eleven home nurses divided into two focus groups were interviewed, and a phenomenological hermeneutical design was used. Four interpretations closely related to each other were revealed: it is essential to have an understanding of the patients' transition history; the nurse' repertoire is challenged in the transition process; care must be adapted to the patients' life world; the excellence of care is threatened by the context. The nurses strived to provide care based upon respect for the independent individual as a living whole. Their ambitions were, however, challenged and threatened by the caring context. The cooperation across organizational levels was pointed out as a critical factor with potential for improvement. This must be taken seriously to support the nurses in their endeavors to provide excellent care.

Differential tolerance to manganese in introduced and bred lines of Macroptilium atropurpureum

1978 ◽  
Vol 29 (1) ◽  
pp. 67 ◽  
Author(s):  
EM Hutton ◽  
WT Williams ◽  
CS Andrew
Keyword(s):  
Dry Matter ◽  
Inorganic Nitrogen ◽  
Evaluation Studies ◽  
Nitrogen Sources ◽  
Manganese Concentration ◽  
Sand Culture ◽  
Manganese Tolerance ◽  
Growth Evaluation ◽  
Macroptilium Atropurpureum ◽  
Nitrogen Phosphorus

A number of lines of Macroptilium atropurpureum, including cv. Siratro, were grown in two experiments at different manganese levels in sand culture. In one experiment 40 ppm manganese was used in conjunction with nitrogen either in inorganic form or as Rhizobium; in the other, two levels of excess manganese (30 and 45 ppm) were used with rhizobial nitrogen at a lower pH. Dry matter yields for tops, roots and nodules were recorded, and the plant material analysed for nitrogen, phosphorus, calcium and manganese. Dry matter yields of tops were reduced, and the ratio of root to total dry matter yield increased, by both Rhizobium and excess manganese. Tops, but not roots or nodules, showed considerable differences in manganese tolerance between lines. Excess manganese caused small but significant changes in concentrations of other minerals. Regressions of rhizobial on inorganic nitrogen showed that at the levels used excess manganese does not impair rhizobial efficiency. Numerical analyses suggested that manganese tolerance operates at three levels; more vigorous lines usually remain so in the presence of manganese, some lines appear to be able to resist the uptake of excess manganese, and for any given level of manganese concentration within the plant, some lines appear more sensitive than others. The results show that growth evaluation studies can be carried out equally well with rhizobial or inorganic nitrogen sources, and they suggest that it should be possible to improve the tolerance of M. atropurpureum lines by selection and/or breeding.

scholarly journals Context Definition and Query Language: Conceptual Specification, Implementation, and Evaluation

Sensors ◽  
2019 ◽  
Vol 19 (6) ◽  
pp. 1478 ◽  
Author(s):  
Alireza Hassani ◽  
Alexey Medvedev ◽  
Pari Delir Haghighi ◽  
Sea Ling ◽  
Arkady Zaslavsky ◽  
...  
Keyword(s):  
Performance Evaluation ◽  
Data Structures ◽  
Query Language ◽  
Contextual Information ◽  
Critical Factor ◽  
Software Components ◽  
Context Management ◽  
Iot Applications ◽  
Research Organizations ◽  
High Level

As IoT grows at a staggering pace, the need for contextual intelligence is a fundamental and critical factor for IoT intelligence, efficiency, effectiveness, performance, and sustainability. As the standardisation efforts for IoT are fast progressing, efforts in standardising context management platforms led by the European Telecommunications Standards Institute (ETSI) are gaining more attention from both academic and industrial research organizations. These standardisation endeavours will enable intelligent interactions between ‘things’, where things could be devices, software components, web-services, or sensing/actuating systems. Therefore, having a generic platform to describe and query context is crucial for the future of IoT applications. In this paper, we propose Context Definition and Query Language (CDQL), an advanced approach that enables things to exchange, reuse and share context between each other. CDQL consists of two main parts, namely: context definition model, which is designed to describe situations and high-level context; and Context Query Language (CQL), which is a powerful and flexible query language to express contextual information requirements without considering details of the underlying data structures. An important feature of the proposed query language is its ability to query entities in IoT environments based on their situation in a fully dynamic manner where users can define situations and context entities as part of the query. We exemplify the usage of CDQL on three different smart city use cases to highlight how CDQL can be utilised to deliver contextual information to IoT applications. Performance evaluation has demonstrated scalability and efficiency of CDQL in handling a fairly large number of concurrent context queries.

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