Aesthetic Determinants in the Pottery Tradition of the Urhobo People of Nigeria’S Niger Delta

Pottery practice is one of the three-dimensional enterprises of the Urhobo people who inhabit part of the Niger Delta region of Nigeria. The people are also known for the production of massive sculptures in wood and mud. Many of the pottery products of the people are, as is the case with their sculptures, configurations of volumes. The expressiveness of these pots is, in part, determined by the way in which the constituting volumes meet each other. In most literature that is available on this art practice of the people, this structural feature is diminished in importance or not considered as a contributing element to the general aesthetics of the ware. This paper interrogates the structural elements that constitute the pots. This is done by dissembling the pots into their structural components (volumes) and analyzing the manner of their coming together to constitute the pot. The findings show that two basic transitions are used as aesthetic attributes in the pottery products from the study area. The study also reaffirms that the extent to which an object satisfies the purpose for which it is made is a strong determinant of the aesthetic value ascribed to the object by a people.

Toward a Fundamental Understanding of the Role of Lignin in the Biorefinery Process

As one of the main components in biomass, lignin plays a vital role in the biorefinery industry. Its unique structural feature increases the dose of cellulases during enzymatic deconstruction and is an attractive resource for many high valued products. The inhibition of lignin on cellulases is proposed to occur in several ways, with the most studied being nonproductive enzyme binding, which is attributed to hydrogen bonding, hydrophobic and/or electrostatic interactions. This review provides a comprehensive review of how lignin is transformed during various pretreatment methods as well as how these changes impact the cellulases inhibition. Future pretreatment directions for decreased cellulases inhibition are also proposed.

Single-atom catalysts cathode for lithium-Oxygen batteries：A review

Recently, single-atom catalysts (SACs) have been found to be one of the promising candidates for oxygen electrocatalysis in rechargeable lithium-oxygen batteries (LOBs), owing to their high oxygen electrocatalytic activity and high stability originated from their unique coordination environments and electronic properties. As a new type of catalysts for LOBs, the advancements have never been reviewed and discussed comprehensively. Herein, the breakthroughs in the design of various types of SACs as the cathode catalysts for LOBs are summarized, including Co-based, Ru-based, and other types of SACs. Moreover, considerable emphasis is placed on the correlations between the structural feature of the SAC active sites and the electrocatalytic performance of LOBs. Finally, perspective and challenges of SACs for practical LOBs are also provided. This review could provide an intensive understanding of SACs for designing efficient oxygen electrocatalysis and offers a useful guideline for the development of SACs in the field of LOBs.

The prevailing O serogroups among the serologically differentiated clinical Proteus spp. strains in central Poland

In the years 2006–2011, 617 Proteus spp. strains isolated mostly from urine and wounds or other clinical sources were collected in Łódź, Poland, to determine the offensive O serotypes frequently occurring among patients. P. mirabilis exhibited the most intensive swarming growth and was dominating species (86.9%), followed by P. genomospecies, P. vulgaris, and P. penneri. Ninety four per cent strains were recognized as S (smooth) forms. Serological studies (involving ELISA—enzyme-linked immunosorbent assay and Western blotting using native and adsorbed rabbit antisera) enabled classification of 80% S isolates into respective Proteus O serogroups among the 83 ones, described so far. The remaining strains seemed to be serologically unique. Despite the observed big serological variety of Proteus spp. isolates, we found the O78 serogroup recently described in Poland as dominating and identified other widespread serotypes: O3, O6, O10, O11, O27, O28, and O30 reported earlier as predominating also in other countries; O77 and O79 detected lately in Poland; O16, O18, O20, and O50. No unique structural feature of the prevalent O serotypes has been indicated. However, the prevalence of some O serogroups indicates that particular serotypes may be in some ways beneficial to the strains producing these kinds of O antigen.

Marking Mirativity in Syntax: Minimalsit Mechanisms

This paper offers a generative minimalist investigation to the derivation and interpretation of mirativity information in Central Najdi Arabic (CNA), arguing that grammar of CNA morphologically marks mirativity in syntax by means of the discourse particle wara. Implementing minimalist mechanisms (Chomsky 2001), it is shown that wara instantiates a functional, discoursal projection MrvP in the left periphery of the sentence, articulating the feature [Mrv] at the PF-interface. LF-interface analyses demonstrate that [Mrv] on wara is interpretable/valued, while the counterpart on the subject DP that wara marks is uninterpretable/unvalued. Agree between wara and the subject DP creates a PF-chain wara>SubjectClitic>SubjectDP that results in the subject DP being marked with and interpreted mirativity at LF-interface. Further explorations show that movement of the subject DP across wara is only legitimised if the subject DP has a discourse, information structural feature beyond [Mrv]. Evidence for this claim comes from the fact that when wara marks the subject DP with mirativity, the subject DP remains in situ. Thus, on minimalist empirical groundings, movement is argued to be motivated by interpretive reasons beyond mirativity. Further analyses show that Agree between wara and subject is of mutual manner; wara u-[φ]-probes the subject goal, while the goal seeks valuation of u-[Mrv] on it (Alshamari 2017).

Scope Restrictions, National Partiality, and War

Most of us believe that partiality applies in a broad range of relationships. One relationship on which there is much disagreement is co-nationality. Some writers argue that co-national partiality is not justified in certain cases, like killing in war, since killing in defense of co-nationals is intuitively impermissible in other contexts. I argue that this approach overlooks an important structural feature of partiality—namely, that its scope is sometimes restricted. In this essay, I show how some relationships that generate reasons of partiality are restricted in scope—that is, they generate reasons within particular contexts or with respect to particular goods. I then argue that co-national partiality is scope restricted. I then show how this fact helps proponents of co-national partiality overcome the aforementioned objection to its application in cases like war.