The influence of extended mercerization on some properties of carboxymethyl cellulose (CMC)

Holzforschung ◽  
2012 ◽  
Vol 66 (1) ◽  
Author(s):  
Heléne Almlöf ◽  
Bjørn Kreutz ◽  
Kristina Jardeby ◽  
Ulf Germgård
Keyword(s):  
Retention Time ◽  
Carboxymethyl Cellulose ◽  
Negative Influence ◽  
Positive Influence ◽  
Alcohol Solution ◽  
Cellulose Ii ◽  
Cellulose I ◽  
Lower Reactivity ◽  
Stage Process ◽  
Water Alcohol

Abstract Carboxymethyl cellulose (CMC) is produced commercially in a two stage process consisting of a mercerization stage in which the pulp is treated with alkali in a water alcohol solution and a second etherification stage whereby monochloro-acetic acid is added to the pulp slurry. In this study, the influence of the conditions of an extended mercerization stage was evaluated on the etherification stage concerning the degree of substitution (DS) and the filterability of the resulting CMC. The parameters studied were: (1) the ratio of cellulose I and cellulose II in the original pulp, (2) the concentration of alkali, (3) the temperature and (4) the retention time in the mercerization stage. The DS results indicate that the NaOH concentration in the mercerization stage is the most important among the parameters studied. When the NaOH concentration in the mercerization stage was high (27.5%), cellulose II showed a lower reactivity than cellulose I with respect to the DS obtained in the resulting CMC. The results from the filtration ability of CMC water solutions are interpreted that the amount of cellulose II in the original pulp and the temperature has a negative influence, while the NaOH concentration in the mercerization stage has a positive influence on the filtration ability. Retention time between 1 h–48 h in the mercerization stage had no effect on the DS or the filtration value. The filtration ability was assumed to be highly influenced by the presence of poorly reacted cellulose segments. The CMC samples with the lowest filtration ability at a given DS can be assumed to have the highest degree of unevenly substituted segments.

Does Diversity in The Boardroom Add Value to a Firm?

2018 ◽  
Vol 18 (5) ◽  
Keyword(s):  
Firm Performance ◽  
Panel Data ◽  
Firm Size ◽  
Significant Influence ◽  
Negative Influence ◽  
Positive Influence ◽  
Future Research ◽  
Board Composition ◽  
Board Diversity

This study examines whether board diversity affects firm performance. We investigate this study using panel data of a sample of S&P 500 firms during a 12 year period. After controlling for industry, firm size, and other board composition variables, we find that all three board diversity variables of interest – gender, ethnicity, and age have a significant influence on firm performance. While ethnicity and age have a positive influence on firm performance, it was found that gender has a negative influence. Implications for future research are discussed.

scholarly journals Concerns or Desires Post-Pandemic: An Extended MGB Model for Understanding South Korean Residents’ Perceptions and Intentions to Travel to China

2021 ◽  
Vol 18 (5) ◽  
pp. 2542
Author(s):  
Guanghui Qiao ◽  
Xiao-li Zhao ◽  
Luqi Xin ◽  
Seokchool Kim
Keyword(s):  
Mass Media ◽  
Latent Variables ◽  
Structural Equation ◽  
Mainland China ◽  
Negative Influence ◽  
Positive Influence ◽  
Extended Model ◽  
South Korean ◽  
Structural Relationships ◽  
China Post

In this study, we examined South Korean residents’ travel-related behavioural intention for mainland China post-COVID-19 using an extended model of goal-directed behaviour. To do so, we integrated South Korean residents’ perceptions of country image (PCI), mass media, and concerns about travel into the framework of the original model of goal-directed behaviour (MGB). Structural equation modelling was used to identify the structural relationships among the latent variables. The results show that mass media had a positive influence on South Korean residents’ perception of China’s image, a negative influence on residents’ concerns, and a positive influence on residents’ behavioural intentions for travel overseas. Meanwhile, PCI had a positive influence on residents’ attitude towards travel overseas. The theoretical and practical implications of the study are discussed.

scholarly journals Filling the void of family leadership: institutional support to business model changes in the Italian Industry 4.0 experience

2021 ◽  
Author(s):  
Marco Cucculelli ◽  
Ivano Dileo ◽  
Marco Pini
Keyword(s):  
Business Model ◽  
Industry 4.0 ◽  
Manufacturing Industry ◽  
Business Models ◽  
Institutional Support ◽  
Negative Influence ◽  
Positive Influence ◽  
External Support ◽  
Family Management ◽  
Family Leadership

AbstractWe examine whether the probability of innovating a company’s business model towards the Industry 4.0 paradigm is affected by external institutional support and family leadership. Industry 4.0 is the information-intensive transformation of global manufacturing enabled by Internet technologies aimed at reinventing products and services from design and engineering to manufacturing. Using a sample of 3000 firms from a corporate survey on the manufacturing industry in Italy, our results showed that family leadership has a significant positive influence on the adoption of Industry 4.0 business models, but only in terms of family ownership. By contrast, family management has a negative influence on the probability of adopting a new business model. However, this negative influence is almost totally offset by the presence of the Triple Helix, i.e. the external support by public institutions and universities, which counterbalances the lower propensity of family managers to adopt Industry 4.0 business models. This supporting role only occurs when institutions and universities act together.

An experimental study of the influence of riblets on transition

1996 ◽  
Vol 315 ◽  
pp. 31-49 ◽  
Author(s):  
G. R. Grek ◽  
V. V. Kozlov ◽  
S. V. Titarenko
Keyword(s):  
Experimental Study ◽  
Three Dimensional ◽  
Negative Influence ◽  
Positive Influence ◽  
Linear Stage ◽  
Turbulent Transition ◽  
Transition Structures ◽  
Stage Transition ◽  
Tollmien Schlichting ◽  
Laminar Turbulent Transition

An experimental study of the effect of riblets on three-dimensional nonlinear structures, the so-called Λ-vortices on laminar-turbulent transition showed that riblets delay the transformation of the Λ-vortices into turbulent spots and shift the point of transition downstream. This result is opposite to the negative influence of such ribbed surfaces on two-dimensional linear Tollmien-Schlichting waves (the linear stage of transition). Thus, the ribbed surface influences laminar-turbulent transition structures differently: a negative influence on the linear-stage transition structures and a positive influence on the nonlinear-stage transition structures. It is demonstrated that transition control by means of riblets requires special attention to be paid to the choice of their location, taking into account the stage of transition.

scholarly journals Lagged Ensembles, Forecast Configuration, and Seasonal Predictions

2013 ◽  
Vol 141 (10) ◽  
pp. 3477-3497 ◽  
Author(s):  
Mingyue Chen ◽  
Wanqiu Wang ◽  
Arun Kumar
Keyword(s):  
Lead Time ◽  
Geographical Location ◽  
Seasonal Prediction ◽  
Skill Score ◽  
Negative Influence ◽  
Positive Influence ◽  
Prediction Skill ◽  
Ensemble Size ◽  
Seasonal Forecasts ◽  
Ensemble Forecasts

Abstract An analysis of lagged ensemble seasonal forecasts from the National Centers for Environmental Prediction (NCEP) Climate Forecast System, version 2 (CFSv2), is presented. The focus of the analysis is on the construction of lagged ensemble forecasts with increasing lead time (thus allowing use of larger ensemble sizes) and its influence on seasonal prediction skill. Predictions of seasonal means of sea surface temperature (SST), 200-hPa height (z200), precipitation, and 2-m air temperature (T2m) over land are analyzed. Measures of prediction skill include deterministic (anomaly correlation and mean square error) and probabilistic [rank probability skill score (RPSS)]. The results show that for a fixed lead time, and as one would expect, the skill of seasonal forecast improves as the ensemble size increases, while for a fixed ensemble size the forecast skill decreases as the lead time becomes longer. However, when a forecast is based on a lagged ensemble, there exists an optimal lagged ensemble time (OLET) when positive influence of increasing ensemble size and negative influence due to an increasing lead time result in a maximum in seasonal prediction skill. The OLET is shown to depend on the geographical location and variable. For precipitation and T2m, OLET is relatively longer and skill gain is larger than that for SST and tropical z200. OLET is also dependent on the skill measure with RPSS having the longest OLET. Results of this analysis will be useful in providing guidelines on the design and understanding relative merits for different configuration of seasonal prediction systems.

Performance risk factors in SME strategic planning

2021 ◽  
Vol ahead-of-print (ahead-of-print) ◽  
Keyword(s):  
Strategic Planning ◽  
Financial Performance ◽  
Emerging Market ◽  
Negative Influence ◽  
Positive Influence ◽  
Content Type ◽  
Political Ties ◽  
Pertinent Information ◽  
Internal Stakeholders ◽  
Business Ties

Purpose This paper aims to review the latest management developments across the globe and pinpoint practical implications from cutting-edge research and case studies. Design/methodology/approach This briefing is prepared by an independent writer who adds their own impartial comments and places the articles in context. Findings This research paper concentrates on the links between SME financial performance, business ties, and political ties. Business ties were revealed to be the fundamental microfoundations of formal strategic planning (FSP), by significantly boosting firms' financial performance. However, political ties were revealed to be something to avoid, in emerging market like Turkey, due to their distracting negative influence of firm performance. SMEs can overcome some of the disadvantages of their size by involving positive influence external parties in strategic work, to support internal stakeholders. Originality/value The briefing saves busy executives, strategists and researchers hours of reading time by selecting only the very best, most pertinent information and presenting it in a condensed and easy-to-digest format.

scholarly journals Stable, metastable and unstable cellulose solutions

2017 ◽  
Vol 4 (8) ◽  
pp. 170487 ◽  
Author(s):  
Marta Gubitosi ◽  
Pegah Nosrati ◽  
Mona Koder Hamid ◽  
Stefan Kuczera ◽  
Manja A. Behrens ◽  
...  
Keyword(s):  
Microcrystalline Cellulose ◽  
Small Angle ◽  
Supersaturated Solution ◽  
Cellulose Ii ◽  
Cellulose I ◽  
Tetrabutylammonium Hydroxide ◽  
X Ray ◽  
Stable Regime ◽  
X Ray Scattering ◽  
A Minor

We have characterized the dissolution state of microcrystalline cellulose (MCC) in aqueous tetrabutylammonium hydroxide, TBAH(aq), at different concentrations of TBAH, by means of turbidity and small-angle X-ray scattering. The solubility of cellulose increases with increasing TBAH concentration, which is consistent with solubilization driven by neutralization. When comparing the two polymorphs, the solubility of cellulose I is higher than that of cellulose II. This has the consequence that the dissolution of MCC (cellulose I) may create a supersaturated solution with respect to cellulose II. As for the dissolution state of cellulose, we identify three different regimes. (i) In the stable regime, corresponding to concentrations below the solubility of cellulose II, cellulose is molecularly dissolved and the solutions are thermodynamically stable. (ii) In the metastable regime, corresponding to lower supersaturations with respect to cellulose II, a minor aggregation of cellulose occurs and the solutions are kinetically stable. (iii) In the unstable regime, corresponding to larger supersaturations, there is macroscopic precipitation of cellulose II from solution. Finally, we also discuss strong alkali solvents in general and compare TBAH(aq) with the classical NaOH(aq) solvent.

scholarly journals PENGARUH BENCANA ALAM, PERUBAHAN IKLIM, DAN KUALITAS LINGKUNGAN TERHADAP JUMLAH KUNJUNGAN WISATAWAN MANCANEGARA KE INDONESIA

2019 ◽  
Vol 1 (4) ◽  
pp. 13
Author(s):  
Safitri Safitri ◽  
Alpon Satrianto
Keyword(s):  
Climate Change ◽  
Regression Analysis ◽  
Panel Data ◽  
Natural Disaster ◽  
Significant Influence ◽  
Research Result ◽  
Negative Influence ◽  
Positive Influence ◽  
Environment Quality ◽  
Research Goal

This research goal is looking for the effect of natural disaster, climate change, and environment quality to the amount of tourist visit to Indonesia. This research uses panel data from 2014 untill 2017, the data get from the related institutions, and uses multiple regression analysis. This research result: 1) Natural disaster has negative influence and it is not significant to tourist visit to Indonesia, 2) Climate change has positive and significant influence to tourist visit to Indonesia, and 3) Environment quality has positive influence and is not significant to the amount of torist visit to Indonesia.

scholarly journals Penerapan Organisasi Pembelajar Dalam Upaya Meningkatkan Kinerja PD ABC

2018 ◽  
Vol 14 (3) ◽  
pp. 228-248
Author(s):  
Rulli Hendriani ◽  
M. Syamsul Ma'arif ◽  
M. Joko Affandi
Keyword(s):  
Organizational Culture ◽  
Organizational Performance ◽  
Performance Improvement ◽  
Learning Organization ◽  
Structural Equation ◽  
Negative Influence ◽  
Positive Influence ◽  
Equation Model ◽  
Insignificant Effect ◽  
Organization Leadership

This study aims to 1) analyze the implementation of learning organization in PD ABC; 2) analyze the influence of learning organization towards performance improvement of PD ABC; 3) analyze the influence of leadership and organizational culture towards learning organizations, 4) analyze the influence of learning organization, leadership and organizational culture towards performance improvement of PD ABC, and 5) formulate a sustainable learning organization strategy to improve the performance of PD ABC. Methods in this research were Structural Equation Model (SEM) and Analytical Hierarchy Process (AHP). The results showed that 1) information systems and sharing of knowledge, organizational relationship, strategic leadership, collaboration and team learning need to be improved; 2) leadership has a positive influence and significant effect with learning organization but organizational culture has insignificant effect towards learning organization; 3) learning organization has a positive influence and significant effect towards improving PD ABC performance; learning organization has a positive influence and significant effect towards organizational performance, although leadership and organizational culture have a negative influence but insignificant effect towards performance organization; 4) in order to develop sustainable learning, PD ABC has to provide measurable evaluation and monitoring systems, transparent rewards and punishment, as well as competent people. Keywords: Leadership, learning organization, organizational culture, organizational performance, strategy Abstrak Penelitian ini bertujuan 1) menganalisis penerapan organisasi pembelajar di PDABC; 2) menganalisis pengaruh organisasi pembelajar terhadap organisasi pembelajar, 3) menganalisis pengaruh kepemimpinan dan budaya organisasi dengan organisasi pembelajar; 4) menganalisis pengaruh organisasi pembelajar, kepemimpinan, dan budaya organisasi terhadap peningkatan kinerja PD ABC; dan 5) memformulasikan strategi organisasi pembelajar berkelanjutan dalam upaya meningkatkan kinerja PD ABC. Metodologi penelitian ini mengambil data secara stratified random sampling ,analisadeskriptif,StructuralEquationModel (SEMLisrel), danAnalyticalHierarchy Process (AHP). Hasil penelitianadalah 1) sistem informasi dan penyebaran pengetahuan, hubungan organisasi,kepemimpinan strategis, kolaborasi dan pembelajaran tim masih perlu ditingkatkan; 2)kepemimpinan berpengaruh signifikan terhadap organisasi pembelajar, budaya organisasiberpengaruh tidak signifikan terhadap organisasi pembelajar; 3) organisasi pembelajarberpengaruh signifikan dengan kinerja organisasi, namun kepemimpinan dan budayaorganisasi secara langsung berpengaruh negatif namun tidak signifikan dengan kinerjaorganisasi 4) strategi meningkatkan kinerja PDABC melalui organisasi pembelajar yaitumenyediakan sistem evaluasi dan monitoring yang terukur serta reward dan punishment yangtransparan. Efektivitas kerja perlu didukung dengan penempatan orang yang tepat sesuai dengan kompetensinya dan melakukan pemberdayaan karyawan.Kata Kunci : Budaya organisasi, kepemimpinan, kinerja organisasi, organisasi pembelajar, strategi

scholarly journals IMPLIKASI PERUBAHAN UNDANG–UNDANG PERPAJAKAN TERHADAP KEPUTUSAN STRATEGI LEVERAGE BAGI PERUSAHAAN YANG TERDAFTAR DI PT. BURSA EFEK JAKARTA

2017 ◽  
Vol 12 (2) ◽  
pp. 227
Author(s):  
Sapari Sapari
Keyword(s):  
Regression Analysis ◽  
Multiple Regression Analysis ◽  
Stock Exchange ◽  
Negative Influence ◽  
Positive Influence ◽  
Independent Variables ◽  
Tax Shield ◽  
Independent Variable ◽  
Debt Tax Shield ◽  
Tax Regulation

This  research  examines the  connection between non debt tax shield and the change of leverage, between level of effective company tax and the change of leverage, and between operation income before depreciation and the change of leverage.This research takes 17 samples of  food and beverages companies listed in Jakarta Stock Exchange from 1st  January 1994 till 31st  December 1999. And this research uses data from 1994 – 1999 for the regression analysis. Multiple regression analysis is used to test hyphothesis 1 (H1), hyphothesis 2 (H2) and hyphothesis 3 (H3). Independent variables in the regression are level of effective company tax, non debt tax shield and operation income before depreciation, whilst independent variable in the regression is leverage.The result of this research proves that (1) non debt tax shield after the amendment of 1994 tax regulation (1995 – 1999) brings positive influence to the leverage change, (2) level of effective company tax after the amendment of 1994 tax regulation (1995 – 1999) brings negative influence to the leverage change, and (3) operation income before  depreciation  after the amendment of 1994 tax regulation (1995 – 1999) brings positive influence to the leverage change.

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