A comprehensive analysis of the effects of the main component enzymes of cellulase derived from Trichoderma reesei on biomass saccharification

2013 ◽  
Vol 40 (8) ◽  
pp. 805-810 ◽  
Author(s):  
Tetsushi Kawai ◽  
Hikaru Nakazawa ◽  
Noriko Ida ◽  
Hirofumi Okada ◽  
Wataru Ogasawara ◽  
...  
Keyword(s):  
Trichoderma Reesei ◽  
Comprehensive Analysis ◽  
Biomass Saccharification ◽  
Main Component

scholarly journals Electrophysiological characterization of a diverse group of sugar transporters from Trichoderma reesei

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Sami Havukainen ◽  
Jonai Pujol-Giménez ◽  
Mari Valkonen ◽  
Ann Westerholm-Parvinen ◽  
Matthias A. Hediger ◽  
...  
Keyword(s):  
Trichoderma Reesei ◽  
Scientific Literature ◽  
Large Body ◽  
Comprehensive Analysis ◽  
Transport Function ◽  
Sugar Transporters ◽  
New Knowledge ◽  
Electrophysiological Characterization ◽  
Shed Light

AbstractTrichoderma reesei is an ascomycete fungus known for its capability to secrete high amounts of extracellular cellulose- and hemicellulose-degrading enzymes. These enzymes are utilized in the production of second-generation biofuels and T. reesei is a well-established host for their production. Although this species has gained considerable interest in the scientific literature, the sugar transportome of T. reesei remains poorly characterized. Better understanding of the proteins involved in the transport of different sugars could be utilized for engineering better enzyme production strains. In this study we aimed to shed light on this matter by characterizing multiple T. reesei transporters capable of transporting various types of sugars. We used phylogenetics to select transporters for expression in Xenopus laevis oocytes to screen for transport activities. Of the 18 tested transporters, 8 were found to be functional in oocytes. 10 transporters in total were investigated in oocytes and in yeast, and for 3 of them no transport function had been described in literature. This comprehensive analysis provides a large body of new knowledge about T. reesei sugar transporters, and further establishes X. laevis oocytes as a valuable tool for studying fungal sugar transporters.

Improved biomass saccharification by Trichoderma reesei through heterologous expression of lacA gene from Trametes sp. AH28-2

2012 ◽  
Vol 113 (6) ◽  
pp. 697-703 ◽  
Author(s):  
Jiwei Zhang ◽  
Yinbo Qu ◽  
Peng Xiao ◽  
Xiaoyan Wang ◽  
Tianhong Wang ◽  
...  
Keyword(s):  
Heterologous Expression ◽  
Trichoderma Reesei ◽  
Biomass Saccharification

scholarly journals Rational Engineering A Xylanase Hyper-Producing System in Trichoderma Reesei for Efficient Biomass Degradation

2020 ◽  
Author(s):  
Su Yan ◽  
Yan Xu ◽  
Xiao-Wei Yu
Keyword(s):  
Trichoderma Reesei ◽  
Xylanase Activity ◽  
Biomass Degradation ◽  
Over Expression ◽  
Rational Engineering ◽  
Biomass Saccharification ◽  
Saccharification Efficiency ◽  
New Perspective ◽  
First Time ◽  
Rut C30

Abstract Background: The degradation of lignocellulose needs the synergetic work of cellulase and xylanase. Filamentous fungi Trichoderma reesei has been widely used as a workhorse for cellulase and xylanase fermentation with great producing ability. Previous work for biomass saccharification mainly aims to improve the component and production of cellulase, however the low xylanase activity in T. reesei could not meet the needs of a high saccharification efficiency. Results: In this study, for the first time, a xylanase hyper-producing system in T. reesei was established by tailoring two transcription factors, XYR1 and ACE1, and homologous over-expression of the major xylanase XYNⅡ. The expression of key xylanolytic enzymes was significantly upregulated with an increase of 6.78- and 1.98-fold in the xylanase activity and pNPXase (β-xylosidase) activity compared to that of the parent, Rut-C30, respectively. Besides, 2310-3085 U/mL of xylanase activities were achieved using soluble lactose or glucose as sole carbon source, which was more efficient and economical than the traditional method of xylan induction. Treated with the crude xylanase cocktails as accessory enzymes, an increase of 39.7% in reducing sugar yield (31.3 mg/mL) in saccharification of alkali pretreated corn stover (5% w/v) was achieved compared to that of the parent. Conclusions: An efficient and economical xylanase hyper-producing platform was developed in T. reesei Rut-C30. The novel platform with outstanding ability for crude xylanase cocktails production would greatly fit in biomass degradation and give a new perspective of further engineering in T. reesei for industrial purposes.

Total etch dentin bonding systems: scanning electron microscopy of the resin-dentin hybrid layer

1992 ◽  
Vol 50 (2) ◽  
pp. 1092-1093
Author(s):  
Jorge Perdigao
Keyword(s):  
Composite Resin ◽  
Mechanical Interlocking ◽  
Hybrid Layer ◽  
Agent Based ◽  
Dentin Bonding ◽  
Acid Agent ◽  
Bond Strengths ◽  
Main Component ◽  
Bonding Systems ◽  
New Generation

In 1955, Buonocore introduced the etching of enamel with phosphoric acid. Bonding to enamel was created by mechanical interlocking of resin tags with enamel prisms. Enamel is an inert tissue whose main component is hydroxyapatite (98% by weight). Conversely, dentin is a wet living tissue crossed by tubules containing cellular extensions of the dental pulp. Dentin consists of 18% of organic material, primarily collagen. Several generations of dentin bonding systems (DBS) have been studied in the last 20 years. The dentin bond strengths associated with these DBS have been constantly lower than the enamel bond strengths. Recently, a new generation of DBS has been described. They are applied in three steps: an acid agent on enamel and dentin (total etch technique), two mixed primers and a bonding agent based on a methacrylate resin. They are supposed to bond composite resin to wet dentin through dentin organic component, forming a peculiar blended structure that is part tooth and part resin: the hybrid layer.

Sozial-räumliche Dynamiken der Agrartreibstoffe.

2016 ◽  
Vol 46 (184) ◽  
pp. 423-440 ◽  
Author(s):  
Kristina Dietz ◽  
Bettina Engels ◽  
Oliver Pye
Keyword(s):  
Political Economy ◽  
Capital Flows ◽  
Spatial Dynamics ◽  
Financial Sector ◽  
Comprehensive Analysis ◽  
Spatial Theory ◽  
Global Political Economy

This article explores the spatial dynamics of agrofuels. Building on categories from the field of critical spatial theory, it shows how these categories enable a comprehensive analysis of the spatial dynamics of agrofuels that links the macro-structures of the global political economy to concrete, place-based struggles. Four core socio-spatial dynamics of agrofuel politics are highlighted and applied to empirical findings: territorialization, the financial sector as a new scale of regulation, place-based struggles and transnational spaces of resources and capital flows.

Concerning the abuse of power by an official

2020 ◽  
pp. 103-110
Author(s):  
Ihor Oheruk
Keyword(s):  
Criminal Code ◽  
Comprehensive Analysis ◽  
Practical Significance ◽  
Abuse Of Power ◽  
Government Functions ◽  
Analysis And Synthesis ◽  
The Status ◽  
The Subject ◽  
Criminal Legislation ◽  
Logical Semantic

Purpose. The purpose of the work is to analyze the application of the second and third parts of Article 3692 of the Criminal Code of Ukraine to officials in the context, that defines them by the Criminal Code of Ukraine in the note to Article 364 of the Criminal Code of Ukraine. Methodology. The methodology includes a comprehensive analysis and synthesis of the available scientific and theoretical material and the formulation of relevant conclusions and recommendations. In the course of the study, the following methods of scientific knowledge were used: terminological, logical-semantic, system-structural, logical-normative. Results: in the course of research the cause of criminalization of such act as "abuse of power" is considered, the subject of the specified criminal act which has the features of "an official" in the context, that defines it by the note to Article 364 of the Criminal Code of Ukraine is analyzed and the main ways of committing criminal acts, that are provided for in this article of the Criminal Code of Ukraine are identified. Originality. The study found, that one of the key conditions for the opportunity to influence officials, that are authorized to perform government or local self-government functions, is the position held by the official and the related opportunities. Therefore, taking into account the opinion of the scientists, that the subject of crimes, that are provided for by the second and third parts of Article 3692 is special, the peculiarities of which is the cumulative feature, that denotes, that such person is not endowed with the status of an official, well-founded need to specify the criminal legislation of Ukraine in terms of the application the second and third parts of Article 3692 of the Criminal code of Ukraine concerning officials in the context, that defines them by the criminal legislation of Ukraine in the note to Article 364 of the Criminal Code of Ukraine. Practical significance. The research results can be used in lawmaking in the improvement of anti-corruption legislation.

BASIC FUNDAMENTALS OF CIVIL LAW AND THEIR IMPORTANCE

2019 ◽  
pp. 120-126
Author(s):  
Diana Vivcharuk
Keyword(s):  
Law Enforcement ◽  
Scientific Knowledge ◽  
Civil Law ◽  
Comprehensive Analysis ◽  
Practical Significance

Purpose. The purpose of the article is the regulation of relations on the principles of civil law. Methodology. The methodology includes a comprehensive analysis and a synthesis of available scientific and theoretical information. It is includes the formulation of relevant conclusions and recommendations. Such methods of scientific knowledge were used: terminological, functional, systemic-structural, logical-normative. Results: it was determined, that principles of civil law – an ideas of the civil law, that characterized by systematic,versatile, more stable, more regylated. Originality. An article is the special reseach that explores the problems of civil law in Ukraine. Practical significance. The results of the research can be used in legislation and law-enforcement activities.

AKAD FINANCING OF MURABAHAH BETWEEN CUSTOMERS WITH MUAMALAT BANKS HARKAT VIEWED FROM SHARI'AH PRINCIPLES

2020 ◽  
Vol 10 (1) ◽  
pp. 13-26
Author(s):  
Candra Irawan ◽  
Adi Bastian ◽  
Febrozi Rohadi
Keyword(s):  
Data Collection ◽  
Financial Institutions ◽  
Research Method ◽  
Economic Condition ◽  
Field Research ◽  
Comprehensive Analysis ◽  
Islamic Banks ◽  
Legal Research ◽  
Trading System ◽  
Library Research

Currently in Indonesia Islamic Bank has gained a place and interested in the community, causing many emerging Syari'ah Bank and Financial Institutions of the syari'ah, and products in Islamic banks are widely used is murabahah financing. The formulation of the problem in this research are: (1). How is the implementation of the sale and purchase through murabahah financing between Bank Muamalat Harkat with customers. (2). Is trading system murabahah financing between Bank Muamalat Harkat and customers have been according to the principles of Syari’ah. (3). How murabahah financing efforts to resolve the breach between the customer and Muamalat Harkat. This research method is empirical legal research, this study was conducted in Bank Muamalat Harkat based data collection through field research such as interviews, observation and description as well as information from respondents through library research. The results of this research are: before an agreement Bank to assess carefully the prospective customer in the form of a comprehensive analysis and is divided into several stages, such as the assessment using the principle of 5C Character (Character of the debitor), Chapacity (Capability Candidate Debitor) , Capital (Capital candidate Debitor), Collateral (Collateral candidate Debitor) and Condition of economy (economic condition of the prospective Borrower). Trading system murabahah financing between Bank Muamalat Harkat with the customer has not fully based on the principles of the Syari'ah. Murabahah financing efforts to resolve the defaults can be solved by R3 is Restrukturing (Arrangement Back), Reconditioning (Terms Back) and Rescheduling (rescheduling), sales collateral and auction execution. 

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