lobna.nassr

Lobna Abdel-Mohsen Ebaid Nassr

Professor - Head Of Chemistry Department- Director of Quality Management Unit - Faculty of Science - Sohag University

Faculty of science

Address: Chemistry Department - Faculty of Science - Sohag University

64

Like

Prof Dr Lobna Abdel-Mohsen Ebaid Nassr

Head of Chemistry Department

Prof. of Non-Organic Chemistry - Faculty of Science - Sohag University

 

https://www.researchgate.net/profile/Lobna_Nassr

https://www.scopus.com/authid/detail.uri?authorId=6506216126

https://scholar.google.com.eg/citations?user=XBI3s7IAAAAJ&hl=en

 


2025-05-09 23:52:34
CHEM336 - Mid Term Exam and Q1Q2 Marks - 2nd 2024/2025
نصف الفصل الدورياتالاسم 5 20 منة الله احمد توفيق عبد المولى 0 17 اسراء عسران فوزي محمود 9 20 مارينا مجدى شوقى عوض 9 20 يؤنا عاطف تامر ناشد 10 20 أروى على صديق عثمان 9 20 آيه محمد صديق محمد 6 19 اسماء نبيل محمود محمد 5 20 تغريد ابراهيم محمد حسن 8 20 جوليا اسامه وهيب فخرى 2 ... Read more

2025-05-09 23:19:14
CHEM105 - Mid Term Exam Marks - 2nd 2024/2025 برنامج الكيمياء الحيوية
0 احمد عبدالله جابر سعدى 0 ايمان صابر على اسماعيل 0 ريحاب عبدالعاطى رشدى احمد 0 صفاء عماد ابوالمعارف عبدالرحيم 0 عبدالله محمود ابوطالب علي 0 علا حسين حمدي علي ابوالفتوح 0 آلاء عمر همام عبد العال 0 أروى احمد عبد اللاه محمد رضوان 2 أسماء حسانين أحمد حسانين 2 آلاء مؤمن احمد احمد عبدالمجيد 2 أمنية السيد خليفة صابر ... Read more

2025-05-08 17:35:46
CHEM232 - Assessment Marks - 2nd 2024/2025
هاجر اشرف – 17 -8 18 0 حازم علي -0-0-20-0 هانى لطيف 8-8-10-0 أحمد عيد 0-0-19-0 شيماء سعد 17-7-17-1 نجلاء محمد 13 9 19 4 ياسمين عادل 0 0 0 0 امل عاصم 20 8 20 6 ايفون اسعد 19 7 10 2 محمد محمود 20 6 18 4 هناء عبدالحميد 13 9 19 0 أميمه رمضان 17 8 19 ... Read more

2025-05-04 17:19:38
CHEM230 - Mid Term Exam Marks - 2nd 2024/2025
هاجر اشرف ابوالغيط السيد 2 شيماء سعد خلف حفنى 0 محمود محمد محمود عبدالله 5 ياسمين عادل ابراهيم احمد 0 حسن عبدالجابر حسن بطيخ 11 ذياد ايمن جادالرب حسن 0 محمد عبد العاطى محمد احمد 6 محمد محمود احمد خليفة 8 احمد خلف نورالدين عبدالرحمن 10 احمد سامح محمود عبد الحميد 5 احمد هاشم عبد الرحيم حسين 19 ارتيل أنسى ... Read more

2025-05-04 16:22:52
درجات امتحان نصف الفصل - مقرر الكيمياء العامة (2) CHEM105- المستوى الاول  علوم طبيعية
احمد رمضان الزهري ابوزيد 0 اسراء محمد احمد رسلان 2 ايه محمد مرزوق علام 0 تسنيم محمد احمد الضبع 0 حسان محمود حسان احمد 0 دنيا بهجت رفعت على 0 رضوى محمود ياسين عبدالحميد 0 سهام حارس خلف عبد المجيد 0 عفاف راضى صبرى شاكر 0 محمود فراج حسن مرزوق 0 منار اشرف احمد محمدين 0 أريج خير الدين محمد ... Read more

2019-12-21 13:28:46 | Keywords Sustainable development goals, Chemical Research, Chemistry,
Role of Chemistry in Implementation the Sustainable Development Goals
The United Nations in September 2015 agreed on a new global Agenda to take the world on a sustainable pathway. The 2030 Agenda for Sustainable Development involves 17 sustainable development goals (SDGs) for countries to reach by 2030. The sustainable development goals are started to be implemented from January 2016 in all around the world. Implementationof SDGs needs executed policies ... Read more

2018-11-28 14:29:32 | Keywords ONO donors, Hydrophobicity, antibacterial,
DNA binding ability mode, spectroscopic studies, hydrophobicity, and in vitro antibacterial evaluation of some new Fe(II) complexes bearing ONO donors amino acid Schiff bases
New series of Fe(II) complexes and Schiff base amino acids have been designed and synthesized from the bioactive ligands by condensation of 5-bromo-2-hydroxybenzaldehyde and aamino acids (L-alanine (ala), L-phenylalanine (phala), L-aspartic acid (aspa), L-histidine (his) and L-arginine (arg)). Elemental analyses, infrared, ultraviolet–visible spectra, as well as conductivity and magnetic susceptibility measurements are used to elucidate the structure of the newly ... Read more

Reactivity trends of hydroxide ion attack on high spin Fe(II) complexes including bromosalcylidene amino acid ligands in some mixed aqueous solvents: Gibb’s free energy of transfer and initial-transition state analysis
The kinetics of hydroxide ion attack on bis(bromosalicylidene alanate)iron (II) (bsali), bis(bromosalicylidene phenylalanate)iron(II) (bsphali), bis(bromosalicylidene aspartate)iron(II) (bsasi), (bromosalicylidene histidinate)iron(II) (bshi), bis(bromosalicylidene arginate)iron(II) (bsari) have been reported in different binary aqueous solvent mixtures at 298 K. The observed reactivity trends are discussed in terms of the hydrophilic and hydrophobic forms of the complexes investigated, as well as the transfer chemical potentials ... Read more

2018-11-28 15:57:41 | Keywords aqueous solvent mixtures, high spin, Chelates,
Hydrophobicity, reactivity trends of base catalyzed hydrolysis of some novel high spin Fe(II) Schiff base amino acid chelates in some binary aqueous solvent mixtures: Initial-transition state analysis
Rate constants for the base hydrolysis of bis(naphthylidene alanate)iron (II) (nali), bis (naphthylidene phenylalanate)iron(II) (nphali), bis(naphthylidene aspartate)iron(II) (nasi) (naphthylidene histidinate)iron(II) (nhi), bis(naphthylidene arginate)iron(II) (nari) have been reported in different binary aqueous solvent mixtures at 298 K. The observed reactivity trends are discussed in terms of the hydrophilic and hydrophobic forms of the complexes investigated, as well as the transfer chemical ... Read more

2018-11-28 15:19:28 | Keywords Coumalic acid, base catalyzed hydrolysis,
Kinetics, reactivity, initial-transition state analysis and thermodynamic parameters of base catalyzed hydrolysis of coumalic acid in solvents with different polarities
Base-catalyzed hydrolysis of coumalic acid (COU) in binary aqueous-methanol and aqueous-acetone mixtures has been studied kinetically at a temperature range from 283 to 313 K Moreover, the change in the activation energy barrier of COU from water to water–methanol and water–acetone mixtures is estimated from the kinetic data. Solvent effects on reactivity trends have been analyzed into initial and transition ... Read more

2018-11-29 01:09:09 | Chemical kinetics 321 C
Acid / base  effect on an enzym
Deduce the relation between the reaction rate and substrate concentration for an enzym "HE" in both acidic and basic medium. Concerning the following: Kb=[H+][HE]/[H2E+] Ka=[H+][E-]/[HE] 0[E] = [HE] + [HES] + [H2E+] + [E-] Read more

2018-11-29 00:50:41 | Kinetic Theory 321 C
nonideal behavior of Gases
If 1.000 mol of an ideal gas were confined to 22.41 L at 0.0°C, it would exert a pressure of 1.000 atm. Use the van der Waals equation to estimate the pressure exerted by 1.000 mol of Cl2(_g_) in 22.41 L at 0.0°C (a = 6.49 L2-atm/mol2, b = 0.0562 , R = 0.08206 L-atm/mol-K). Read more

2018-11-13 11:46:55 | Physical Chemistry 251 C
The units of different Rate constants
The units of different Rate constants The _order_ of a rate law is the sum of the exponents of its concentration terms. Once the rate law of a reaction has been determined, that same law can be used to understand more fully the composition of the reaction mixture. More specifically, the reaction order is the exponent to which the concentration ... Read more

2018-10-30 11:36:41 | Physical Chemistry 251 C
First order Reaction
The RATE LAW or RATE EQUATION for a chemical reaction is an equation that links the reaction rate with the concentrations or pressures of the reactants and constant parameters (normally rate coefficients and partial reaction orders). A first order reaction depends on the concentration of only one reactant (a unimolecular reaction) IN 1ST ORDER REACTION:IN 1ST ORDER REACTION:IN 1ST ORDER ... Read more

2018-10-17 20:23:55 | Kinetic Theory 321 C
Total and Average Kinetic Energy
[1] A tank used for filling helium balloons has a volume of 0.300 m3 and contains 2.00 mol of helium gas at 20.0°C. Assume that the helium behaves like an ideal gas. (A) What is the total translational kinetic energy of the gas molecules? (B) What is the average kinetic energy per molecule? [2] What if the temperature is raised ... Read more