Synthesis of Tetrasulfides. Recent Literature. The use of a six-membered thiamine disulfurating reagent enables a mild and efficient moduling disulfuration for polysulfide construction. Under the control of energy release of ring strain, diverse unsymmetrical trisulfides and tetrasulfides were generated through the assembly of nucleophiles on ...The garlic compound diallyl tetrasulfide (DTS) has the cytoprotective and antioxidant activity against Cd induced toxicity. The present study was carried out to investigate the efficacy of D … Cadmium (Cd) is a neurotoxic metal, which induces oxidative stress and membrane disturbances in nerve system.Article Views are the COUNTER-compliant sum of full text article downloads since November 2008 (both PDF and HTML) across all institutions and individuals.Study with Quizlet and memorize flashcards containing terms like N2F4, P4S7, P4S3 and more.For magnesium ion batteries (MIBs) to be used commercially, new cathodes must be developed that show stable reversible Mg intercalation. VS4 is one such promising material, with vanadium and disulfide anions [S2]2- forming one-dimensional linear chains, with a large interchain spacing (5.83 Å) enabling reversible Mg insertion. However, little is known about the details of the redox ...cheminform abstract: an mo theoretical study on the dications of tetrasulfur, tetraselenium, and tetratellurium. Chemischer Informationsdienst 1980 , 11 (11) DOI: 10.1002/chin.198011002.Pyrolysis of Wood and Bark in an Auger Reactor: Physical Properties and Chemical Analysis of the Produced Bio-oils; Improved Protein Dynamics and Hydration in the Martini3 Coarse-Grain ModelOverall,white British pupils in England were lagging behind their ethnic minority peers. Students who speak English as an additional language (EAL) are overtaking native speakers i...Chemical Formulas for Molecular Compounds. Write the correct formula in the space below. ClO. Chlorine monoxide. SiCl4. Silicon tetrachloride. OF2. Oxygen difluoride.DOI: 10.1021/IC50202A060 Corpus ID: 101094523; An MO theoretical study on the dications of tetrasulfur, tetraselenium, and tetratellurium @article{Tanaka1979AnMT, title={An MO theoretical study on the dications of tetrasulfur, tetraselenium, and tetratellurium}, author={Kazuyoshi Tanaka and Tokio Yamabe and Hiroyuki Teramae and Ken-ichi Fukui}, journal={Inorganic Chemistry}, year={1979 ...The compound name for Se4S4 is tetraselenium tetrasulfide. It is a selenium compound in the sulphide class, and it has a red color and a crystalline solid appearance. What is the formula for Tetraphosphorus Hexachloride? P4S6 Tetraphosphorus hexasulfide | P4S6 - PubChem.Tetraselenium 400-E. Composition/1 ml: Vitamin E (3a700) 80 mg, Sodium selenite (E8) 400 µg. The product is indicated for supporting the antioxidant system of animals, for increasing their stress tolerance and for the prevention and treatment of reproductive disturbances associated with vitamin E deficiency. Selenium, which is a constituent of ...The balanced chemical reaction can be used to determine molar relationships between substances. 10.3: Mole-to-Mole Conversions is shared under a license and was authored, remixed, and/or curated by LibreTexts. Previously, you learned to balance chemical equations by comparing the numbers of each type of atom in the …Supplementation of N-acetylcysteine tetrasulfide (NAC-S2), a supersulfide donor, attenuated the pro-inflammatory gene expression in xCT-KO PMs. Thus, activated macrophages increase cystine uptake via xCT and produce supersulfides, creating a negative feedback loop to limit excessive inflammation. Our study highlights the finely …Being assigned a small piece of real estate at the office used to be part of the thrill of being on staff. To modern workers everywhere, I’m writing this from a “hot desk,” and it’...Vanadium tetrasulfide (VS 4) is a conductive linear-chain compound with neighboring V 4+ (S 2 2−) 2 chains bonded by van der Waals forces, which can facilitate fast charge-transfer kinetics and has been reported to be a favorable intercalation cathode material for high-performance batteries. 28,29 This type of material with excellent ...Diallyl tetrasulfide is an organosulfur compound that has been found in A. sativum and has diverse biological activities, including antimicrobial, antioxidant, and anticancer properties. 1,2,3,4 It is active against the bacteria S. aureus and methicillin-resistant S. aureus (MRSA; MICs = 0.5 and 2 mg/L, respectively), as well as the fungi C. albicans, C. krusei, C. glabrata, A. niger, A ...A straightforward strategy involving photocatalysis has been established for accessing trisulfide dioxides from readily achieved symmetrical tetrasulfides. Stern–Volmer analysis and radical quenching experiments demonstrated the occurrence of a single electron transfer between the photocatalyst and sulfinicNotes. Go To: Top Data from NIST Standard Reference Database 69: NIST Chemistry WebBook The National Institute of Standards and Technology (NIST) uses its best efforts to deliver a high quality copy of the Database and to verify that the data contained therein have been selected on the basis of sound scientific judgment.Realgar (tetraarsenic tetrasulfide) and orpiment (arsenic trisulfide) are naturally occurring sulfides of arsenic. 765 In one form or another, arsenic is present in rocks, 603 in soils, 307 in water, 435 and in living organisms 92 in concentrations of parts per billion to parts per million. The commercial use and production of inorganic and ...Enhancing the zinc ion storage ability of the existing cathodes is an important research field. Constructing the heterostructure is a promising and effective strategy. Interestingly, for oxygen-free cathodes, a nano-depth heterostructure layer will inevitably form on their surface when exposed to air. HoweveJan 25, 2023 · Rechargeable aluminum batteries (RABs) are gaining widespread attention for large-scale energy storage applications as a result of their high energy densities, high security, and abundance. The key to sustain the progress of RABs lies in the quest for the proper cathode materials with prominent capacity and reversible cycle life. Herein, we propose a tremella-like VS4 as a cathode material ...A fundamental study on Cyclic Tetrasulfide as a sulfur donor and co-agent for rubber crosslinking. Gina Butuc *, Jose Swart, Marcel Simons, Jan van Velde, Kees van Leerdam, Brenda Rossenaar, Auke Talma, Anke Blume * Corresponding author for this work. Elastomer Technology and Engineering;NIH. HHS. USA.gov. Tetrasulfide (2-) | S4-2 | CID 4685008 - structure, chemical names, physical and chemical properties, classification, patents, literature, biological activities, safety/hazards/toxicity information, supplier lists, and more.Enhancing the zinc ion storage ability of the existing cathodes is an important research field. Constructing the heterostructure is a promising and effective strategy. Interestingly, for oxygen-free cathodes, a nano-depth heterostructure layer will inevitably form on their surface when exposed to air. Howevetetrasulfide: [noun] a binary compound of an element or radical with four atoms of sulfur.An electrochemical sensor is described for the determination of nilutamide (NLM) in biological fluids. A flexible mat of nitrogen-doped carbon nanofibers (NCNFs) was prepared by electrospinning. This was followed by carbonization and the growth of one-dimensional vanadium tetrasulfide (VS4) nanorods in the circumference of the NCNFs …Oral Tetra-Arsenic Tetra-Sulfide Formula Versus Intravenous Arsenic Trioxide As First-Line Treatment of Acute Promyelocytic Leukemia: A Multicenter RandomizedSamsara Eco, an Australian startup that uses enzyme-based tech to recycle plastics, textiles and other materials, has partnered with Lululemon. Samsara Eco, an Australian startup t...noun. tet· ra· sulfide. "+. : a binary compound of an element or radical with four atoms of sulfur. Word History. Etymology. tetra- + sulfide. Love words? You must — there are over 200,000 words in our free online dictionary, but you are looking for one that’s only in the Merriam-Webster Unabridged Dictionary.noun. tet· ra· sulfide. "+. : a binary compound of an element or radical with four atoms of sulfur. Word History. Etymology. tetra- + sulfide. Love words? You must — there are over 200,000 words in our free online dictionary, but you are looking for one that’s only in the Merriam-Webster Unabridged Dictionary.Tetraselenium tetrasulphide. Se compounds. More compounds... Formula: Se 4 S 4. Hill system formula: S 4 Se 4. CAS registry number: [75926-28-2] Formula weight: 444.104. Class: sulphide. Colour: red. Appearance: crystalline solid. Melting point: 113°C (decomposes) Boiling point: Density: 3300 kg m -3.Diethyl tetrasulphide | C4H10S4 | CID 83689 - structure, chemical names, physical and chemical properties, classification, patents, literature, biological activities ...DIPENTAMETHYLENETHIURAM TETRASULFIDE. CAS NO. EINECS NO. MOL WT. This compound is used as primary or secondary accelerator or sulfur donor for for both natural rubber and synthetic. It offers higher crosslink density than other thiurams. It offers a lower reversion tendency and improved heat stability.The infrared spectrum of solid S4N4 has been recorded to a low‐frequency limit of 50 cm−1, the Raman spectrum re‐examined, and depolarization ratios of the most intense spectral lines obtained. The 12 observed vibrational fundamentals of tetrasulfur tetranitride have been fit by means of a valence force field in which 10 independent parameters were adjusted. The calculated frequencies ...Tetraselenium tetranitride, Se4N4, is an orange, hygroscopic solid which is explosive and very sensitive to shock when dry, although it can be stored under chloroform. Like th e sulphu r analogue, the colou r varies with temperature, becoming red a t 100° and yellow-orange at liquid air temperature; it decomposes violently at 160°. The ...Notes. Go To: Top Data from NIST Standard Reference Database 69: NIST Chemistry WebBook The National Institute of Standards and Technology (NIST) uses its best efforts to deliver a high quality copy of the Database and to verify that the data contained therein have been selected on the basis of sound scientific judgment.SAFETY DATA SHEET Revision Date 30-Mar-2024 Revision Number 4 1. Identification Product Name Bis(3-(triethoxysilyl)propyl)tetrasulfide Cat No. : 42410 CAS No 40372-72-3 Synonyms No information available Recommended Use Laboratory chemicals. Uses advised against Food, drug, pesticide or biocidal product use. Details of the supplier of the safety data sheetSODIUM TETRASULFIDE. Molecular Formula NaS. Average mass 174.240 Da. Monoisotopic mass 173.867813 Da. ChemSpider ID 74748. - Charge.Tellurium diiodide | I2Te | CID 10970946 - structure, chemical names, physical and chemical properties, classification, patents, literature, biological activities ...Computed by PubChem 2.2 (PubChem release 2021.10.14) Dates. Create: 2005-03-27. Modify: 2024-05-11. Description. Methyl propyl tetrasulphide is a natural product found in Allium ampeloprasum and Allium cepa with data available. LOTUS - the natural products occurrence database.Each tetrasulfide exhibits two major voltage regions in the discharge. The high voltage slope region is governed by the formation of persulfides and thiolates, and the low voltage plateau region is due to the formation of Li 2 S 2 /Li 2 S. Based on theoretical calculations and spectroscopic analysis, three reduction reaction processes are ...NEW YORK, Jan. 10, 2022 /PRNewswire/ -- Data Vault Holdings Inc., leading the way in tokenomics and metaverse data visualization, valuation, and m... NEW YORK, Jan. 10, 2022 /PRNew...Given this, branched vanadium tetrasulfide (VS 4 ) nanodendrites with a narrower bandgap (compared with the most exten … The development and optimization of sonosensitizers for elevating intratumoral reactive oxygen species (ROS) are definitely appealing in current sonodynamic therapy (SDT).Supplementation of N-acetylcysteine tetrasulfide (NAC-S2), a supersulfide donor, attenuated the pro-inflammatory gene expression in xCT-KO PMs. Thus, activated macrophages increase cystine uptake via xCT and produce supersulfides, creating a negative feedback loop to limit excessive inflammation. Our study highlights the finely tuned regulation ...Acute promyelocytic leukemia (APL) is liable to induce disseminated intravascular coagulation and has a high early mortality. Although the combination of all-trans retinoic acid (ATRA) and arsenic trioxide (ATO) has significantly improved the complete remission rate, there are still some patients developed drug resistance. Growing evidence suggests that natural killer (NK) cell-mediated ...Article Views are the COUNTER-compliant sum of full text article downloads since November 2008 (both PDF and HTML) across all institutions and individuals.Moreover, the tetrasulfide crosslink is stable over a wide range of pH values (5-8) in the absence of a reducing agent and cannot be capped with IAM; this suggests that the presumptive ...What is the formula for Tetraselenium Tetrasulfide? Tetraselenium Tetrasulfide Se4S4 Molecular Weight — EndMemo. Why is Si3N4 a ceramic? Si3N4 Ceramics, Structure and Properties Silicon nitrides are a group of advanced engineering ceramics with high strength, fracture toughness, hardness, wear resistance and good chemical and thermal ...mass, nuclear magnetic resonance, and raman spectroscopy of octadecyl sulfide, disulfide, and tetrasulfide. Phosphorus and Sulfur and the Related Elements 1979 , 7 (3) , 315-319.Bis(triethoxysilylpropyl) tetrasulfide (TESPT) with ethoxysilyl and tetrasulfide groups were grafted successfully on the oxidized short carbon fibers (CF) surface in order to create a strong continuous network between short CF and styrene butadiene rubber (SBR).Bis (triethoxysilylpropyl)tetrasulfide is a bifunctional molecule in that it contains two kinds of reactive functional groups. The tetrasulfide group is a polysulfide, which means that it consists of a chain of sulfur atoms. S-S bonds are susceptible to reduction (to thiols), attachment to metals (e.g., for protection against corrosion ), and ...Question: Tetraselenium hexafluoroarsenate (V), Se4(AsF6)2, are formed when a polyatomic selenium react with arsenic (V) fluoride, AsF5, at near 80°C. The mole ratio between Se4(AsF6)2 to polyatomic selenium is 2:1. If the yield is 100%, 525 g of polyatomic selenium will yield 1153 g of Se4(AsF6)2. How many atoms does a single molecule of ...The presence of physisorbed water during the silanization of silica is well-known for strongly influencing the silane reactivity at the interface. In this work, the reactivity of bis[3-(triethoxysilyl)propyl] tetrasulfide (TESPT), widely used in the rubber industry, on hydrated precipitation silica was investigated by time-resolved operando FTIR spectroscopy and chemometrics. The ...Other names: Diallyl tetrasulphide; Diallyl tetrasulfide Permanent link for this species. Use this link for bookmarking this species for future reference. Information on this page: Mass spectrum (electron ionization) Gas Chromatography; References; Notes; Options: Switch to calorie-based unitsBis (triethoxysilylpropyl)tetrasulfide is a bifunctional molecule in that it contains two kinds of reactive functional groups. The tetrasulfide group is a polysulfide, which means that it consists of a chain of sulfur atoms. S-S bonds are susceptible to reduction (to thiols), attachment to metals (e.g., for protection against corrosion ), and ...The PDA and tetrasulfide bond co-doped hollowed mesoporous silica coating on solid silica were synthesized by a biphase stratification with oil-water strategy system [34]. According to the above strategy, the co-doped mesoporous silica nanospheres were acquired with little modification. Briefly, 1.5 g CTAB was firstly dispersed in 10 mL …Appearance: crystalline solid. Melting point: (explodes on warming) Boiling point: Density: 4200 kg m -3. The following are some synonyms of tetraselenium tetranitride: tetraselenium tetranitride. selenium (III) nitride. selenium nitride. The oxidation number of selenium in tetraselenium tetranitride is 3.Notes. Go To: Top Data from NIST Standard Reference Database 69: NIST Chemistry WebBook The National Institute of Standards and Technology (NIST) uses its best efforts to deliver a high quality copy of the Database and to verify that the data contained therein have been selected on the basis of sound scientific judgment.What is the formula for Tetraselenium Tetrasulfide? Tetraselenium Tetrasulfide Se4S4 Molecular Weight — EndMemo. Why is Si3N4 a ceramic? Si3N4 Ceramics, Structure and Properties Silicon nitrides are a group of advanced engineering ceramics with high strength, fracture toughness, hardness, wear resistance and good chemical and thermal ...Sep 6, 2022 · Tetraselenium Tetrasulfide Se4S4 Molecular Weight -- EndMemo. How many valence electrons does Br2O? But there are total 20 valence electrons in Br2O molecule (as calculated in step #1).DOI: 10.1021/IC50202A060 Corpus ID: 101094523; An MO theoretical study on the dications of tetrasulfur, tetraselenium, and tetratellurium @article{Tanaka1979AnMT, title={An MO theoretical study on the dications of tetrasulfur, tetraselenium, and tetratellurium}, author={Kazuyoshi Tanaka and Tokio Yamabe and Hiroyuki Teramae and Ken-ichi Fukui}, journal={Inorganic Chemistry}, year={1979 ...The tetrasulfide degraded faster at 40 °C than at room temperature. After 20 days, the tetrasulfide degraded by 83%. An estimated half-life and rate constant were obtained after 20 days and found to be 8.0 days and 8.7 × 10 –2 days –1 , respectively ( Figure S19b ).United Airlines will launch a new inflight dining menu on April 1, before rolling out the offerings to all flights later this summer. The next time you fly with United, you might w...A simple, efficient synthesis of tetraselenium tetranitride. J. Siivari T. Chivers R. Laitinen. Chemistry. 1993. 12. Semantic Scholar extracted view of "A Simple, Efficient Synthesis of Se4N4" by J. Siivari et al.Tetraselenium 400-E. Composition/1 ml: Vitamin E (3a700) 80 mg, Sodium selenite (E8) 400 µg. The product is indicated for supporting the antioxidant system of animals, for increasing their stress tolerance and for the prevention and treatment of reproductive disturbances associated with vitamin E deficiency. Selenium, which is a constituent of ...Tetranitrogen tetrasulfide. Molecular Formula NS. Average mass 184.287 Da. Monoisotopic mass 183.900574 Da. ChemSpider ID 124788.Tetrasulfide(2-) | S4-2 | CID 4685008 - structure, chemical names, physical and chemical properties, classification, patents, literature, biological activities ...Tetrasulfur tetranitride is an inorganic compound with the formula S4N4. This gold-poppy coloured solid is the most important binary sulfur nitride, which are compounds that contain only the elements sulfur and nitrogen. It is a precursor to many S-N compounds and has attracted wide interest for its unusual structure and bonding.Click here to get an answer to your question: Fill in the systematic names of the following chemical compounds. Note: for compounds containing hydrogen, you may give the common name instead. molec...Sodium polysulfide can be produced by dissolving sulfur in a solution of sodium sulfide. Alternatively they are produced by the redox reaction of aqueous sodium hydroxide with sulfur at elevated temperatures. What is the chemical name of Hypo? It is used for both film and photographic paper processing; the sodium thiosulfate is known as aSe₄S₄: Tetraselenium tetrasulfide; SeS₂: Selenium disulfide; XeF₆: Xenon hexafluoride; XeO₃: Xenon trioxide; H₂O: Water (common name) The systematic names for the given chemical compounds are as follows: 1. Se₄S₄: Tetraselenium tetrasulfide. The prefix "tetra-" indicates that there are four selenium atoms present in the compound.The tetrasulfide moiety -SSSS-is desirable for copper wetting. ( 2 7.8.) Cu 920/O 503 AES intensity ratio vs. deposition time or copper thickness. The break in the slope corresponds to a complete ...8 September 2022—Buy Tetraarsenic tetrasulfide.,Cas No.:12279-90-2, MOQ 1 gram, Molecular Formula:,Molecular Weight:,IUPAC Name :.Dimethyl Tetrasulfide . Safety Information: European information : Most important hazard(s): Xn - Harmful. R 22 - Harmful if swallowed. R 36/37/38 - Irritating to eyes, respiratory system, and skin. S 02 - Keep out of the reach of children. S 20/21 - When using do not eat, drink or smoke.Tetrasulfide bonds demonstrate great potential for constructing DPNAs. Tetrasulfide bonds promote blood circulation and tumor accumulation of DPNAs. Highly tumor-selective g-4S-2CTX NPs resolve the efficacy-safety paradox of DPNAs. The ''add fuel to the flames'' strategy further enhances therapeutic efficacy.The prepared tetrasulfides were characterized by 1 H and 13 C{1 H} NMR spectroscopy to assess the purity of each product and EI-MS to confirm selective tetrasulfide formation. A representative mass spectrum of 3 is shown in Figure 2 a, which clearly shows the parent ion peak corresponding to Ph 2 S 4 (282.0), as well as daughter fragmentation peaks corresponding to extrusion of one and two ...molecular formula name of compound Se_(4)S_(4) XeO_(3) SeS_(2) XeF_(6) NH_(3) molecular formula name of compound Se_(4)S_(4) XeO_(3) SeS_(2) XeF_(6) NH_(3)1-demethylhyalodendrin tetrasulfide is an organooxygen compound and an organonitrogen compound. It is functionally related to an alpha-amino acid. ChEBI. 1 Structures. 1.1 2D Structure. Structure Search. Get Image. Download Coordinates. Chemical Structure Depiction. Full screen Zoom in Zoom out. PubChem.Moreover, the tetrasulfide crosslink is stable over a wide range of pH values (5–8) in the absence of a reducing agent and cannot be capped with IAM; this suggests that the presumptive ...The compound name for Se4S4 is tetraselenium tetrasulfide. It is a selenium compound in the sulphide class, and it has a red color and a crystalline solid appearance. Is FeSO4 a ionic or covalent ...Form 5 Spelling List: 2014 - 2015 Autumn Term 2014 Week 1 WordVanadium tetrasulfide (VS4, called patronite as a mineral) is a one-dimensional compound with promising properties for energy conversion applications. However, it has been scarcely investigated because of its complex synthesis. In this work, we report a detailed investigation about the formation mechanism of VS4 (V4+(S22–)2) as well as its …cheminform abstract: an mo theoretical study on the dications of tetrasulfur, tetraselenium, and tetratellurium. Chemischer Informationsdienst 1980 , 11 (11) DOI: 10.1002/chin.198011002.-SulfoBiotics- Sodium tetrasulfide (Na2S4) Oxidative Stress; Oxidative Stress; Biosulfur Analysis. Product code. SB04 -SulfoBiotics- Sodium tetrasulfide (Na2S4) CAS No. 12034-39-8. Chemical name. Sodium tetrasulfide, anhydrous. MW. Na 2 S 4 =174.22. Unit size--100 mg x 5: Please inquire distributors about price.By combining theoretical calculations and experimental investigations, the expansion of interchain distance and reversible intercalation of MgCl + are revealed. With the fast kinetics of MgCl + (instead of Mg 2+) intercalation into expanded VS 4 @rGO, higher capacity of 268.3 mA h g -1 at 50 mA g -1 and better rate capability of 85.9 mA h g -1 ...Di-tert-butyl tetrasulphide | C8H18S4 | CID 80047 - structure, chemical names, physical and chemical properties, classification, patents, literature, biological ...Match. Created by. Scott_Oliver Teacher. Use these flashcards to practice writing chemical formulas for ionic compounds. Learn with flashcards, games, and more — for free.The compound name for Se4S4 is tetraselenium tetrasulfide. It is a selenium compound in the sulphide class, and it has a red color and a crystalline solid appearance. Is FeSO4 a ionic or covalent ...Melting point: 305°C. Boiling point: 196°C. Density: 2600 kg m -3. The following are some synonyms of tetraselenium hexadecachloride: tetraselenium hexadecachloride. selenium (IV) chloride. selenium chloride. selenium tetrachloride. The oxidation number of selenium in tetraselenium hexadecachloride is 4.The meaning of TETRASULFIDE is a binary compound of an element or radical with four atoms of sulfur.cheminform abstract: an mo theoretical study on the dications of tetrasulfur, tetraselenium, and tetra, Visit ChemicalBook To find more Bis[3-(triethoxysilyl)propyl]tetrasulfide(40372-72-3) information like chemical , A straightforward strategy involving photocatalysis has , Name: 1- (propyltetrasulfanyl)propane. CAS Number: 52687-98-6. 3D/inchi. ECHA EINECS - REACH, Electronic structures of tetrasulfur tetranitride, tetraarsenic tetrasulfide, and tetraarsenic, The tetrasulfide degraded faster at 40 °C than at room temperature. After 20 days, the te, The known molar mass of H 2 is. (2.016gH2 1molH2) ( 2.016 g, Notes. Go To: Top Data from NIST Standard Reference Database 69: NIST , European discounter Norwegian Air is slashing flights and , Effective messenger RNA (mRNA) transfection in hard-to-t, In this work, the reactivity of bis[3-(triethoxysilyl)propyl] , Tetraselenium Tetrasulfide Se4S4 Molecular Weight — EndMe, Tetrasulfur tetranitride. Tetrasulfur tetranitride is an inorgani, Poly(ethylene tetrasulfide) (PETS) was used as the polysulfide, Δ H f: 10.6 kcal/mol, REF: D. D. Wagman, W. H. Evans, V. B. Par, The present review articulates the syntheses and properties , Se₄S₄: Tetraselenium tetrasulfide; SeS₂: Selenium disu, For more than 30 years, Polymer Engineering & Science has .