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Sci, Volume 3, Issue 4

2021 December - 14 articles

Cover Story: We present a method using contour integration to derive definite integrals and their associated infinite sums, which can be expressed as a special function. We provide proof of the basic equation and some examples of the method. The advantage of using special functions is their analytic continuation, which widens the range of parameters of the definite integral in which the formula is valid. We provide definite integrals of a logarithmic function times a trigonometric function as examples. In various cases, these generalizations evaluate known mathematical constants, such as Catalan’s constant C and p. View this paper
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Articles (14)

  • Article
  • Open Access
8 Citations
4,025 Views
12 Pages

Assessment of Air Quality Perception and Its Effects on Users’ Thermal Comfort in Office Buildings

  • Candi Citadini de Oliveira,
  • Ricardo Forgiarini Rupp and
  • Enedir Ghisi

14 December 2021

Since people spend most of their time in indoor environments, the objective of this work was to study indoor air quality and its effects on users’ thermal comfort. Based on previous data from a building with a central air-conditioning system an...

  • Article
  • Open Access
3 Citations
3,470 Views
11 Pages

Hypergolic Synthesis of Inorganic Materials by the Reaction of Metallocene Dichlorides with Fuming Nitric Acid at Ambient Conditions: The Case of Photocatalytic Titania

  • Nikolaos Chalmpes,
  • Georgios Asimakopoulos,
  • Maria Baikousi,
  • Athanasios B. Bourlinos,
  • Michael A. Karakassides and
  • Dimitrios Gournis

3 December 2021

Hypergolic materials synthesis is a new preparative technique in materials science that allows a wide range of carbon or inorganic solids with useful properties to be obtained. Previously we have demonstrated that metallocenes are versatile reagents...

  • Review
  • Open Access
13 Citations
8,819 Views
22 Pages

1 December 2021

Animal testing is mandatory in drug testing and is the gold standard for toxicity and efficacy evaluations. This situation is expected to change in the future as the 3Rs principle, which stands for the replacement, reduction, and refinement of the us...

  • Review
  • Open Access
193 Citations
64,350 Views
19 Pages

Plant-Derived Saponins: A Review of Their Surfactant Properties and Applications

  • Summi Rai,
  • Eliza Acharya-Siwakoti,
  • Ananda Kafle,
  • Hari Prasad Devkota and
  • Ajaya Bhattarai

16 November 2021

In response to increasing natural surfactant demand and environmental concerns, natural plant-based surfactants have been replacing synthetic ones. Saponins belong to a class of plant metabolites with surfactant properties that are widely distributed...

  • Article
  • Open Access
4 Citations
3,140 Views
13 Pages

12 November 2021

Heat transfer enhancement is a topic of great interest nowadays due to its different applications in industries. A porous material also known as metallic foam plays a major role in heat enhancement at the expense of pressure drop. The flow in channel...

  • Article
  • Open Access
3 Citations
3,521 Views
11 Pages

9 November 2021

Glycine in its neutral form can exist in the gas phase while its zwitterion form is more stable in water solution, but how many waters are actually necessary to stabilize the zwitterionic structure in the gas phase? Are the intramolecular isotropic s...

  • Article
  • Open Access
3 Citations
4,866 Views
13 Pages

Association between Transcription Factor 7-like-2 Polymorphisms and Type 2 Diabetes Mellitus in a Ghanaian Population

  • Christian Obirikorang,
  • Evans Asamoah Adu,
  • Enoch Odame Anto,
  • Emmanuel Acheampong,
  • Lawrence Quaye,
  • Brodrick Yeboah Amoah,
  • Max Efui Annani-Akollor,
  • Aaron Siaw Kwakye,
  • Foster Fokuoh and
  • Wei Wang
  • + 6 authors

5 November 2021

Type 2 diabetes mellitus (T2DM) has been strongly associated with single nucleotide polymorphisms (SNPs) in the TCF7L2 gene. This study investigated the association between rs12255372, rs7903146 in the TCF7L2 gene and T2DM in a Ghanaian population. A...

  • Article
  • Open Access
6 Citations
4,626 Views
13 Pages

Graph Coverings for Investigating Non Local Structures in Proteins, Music and Poems

  • Michel Planat,
  • Raymond Aschheim,
  • Marcelo M. Amaral,
  • Fang Fang and
  • Klee Irwin

1 November 2021

We explore the structural similarities in three different languages, first in the protein language whose primary letters are the amino acids, second in the musical language whose primary letters are the notes, and third in the poetry language whose p...

  • Article
  • Open Access
5 Citations
4,804 Views
10 Pages

20 October 2021

We present a method using contour integration to derive definite integrals and their associated infinite sums which can be expressed as a special function. We give a proof of the basic equation and some examples of the method. The advantage of using...

  • Review
  • Open Access
6 Citations
5,908 Views
22 Pages

Permeable Pavements as a Means to Save Water in Buildings: State of the Art in Brazil

  • Igor Catão Martins Vaz,
  • Lucas Niehuns Antunes,
  • Enedir Ghisi and
  • Liseane Padilha Thives

14 October 2021

Permeable pavements have been the subject of numerous studies in recent decades. The possibility of dissipating stormwater more smoothly and generating numerous benefits to the environment and users makes the use of permeable pavements an excellent p...

  • Article
  • Open Access
3 Citations
13,136 Views
18 Pages

13 October 2021

How does the world around us work and what is real? This question has preoccupied humanity since its beginnings. From the 16th century onwards, it has periodically been necessary to revise the prevailing worldview—but things became very strange at th...

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Sci - ISSN 2413-4155