تفاصيل مارك
| 000 -LEADER |
|---|
| fixed length control field |
06927namaa22004451i 4500 |
| 003 - CONTROL NUMBER IDENTIFIER |
|---|
| control field |
EG-GICUC |
| 005 - أخر تعامل مع التسجيلة |
|---|
| control field |
20260426115233.0 |
| 008 - FIXED-LENGTH DATA ELEMENTS--GENERAL INFORMATION |
|---|
| fixed length control field |
260411s2025 ua a|||frm||| 000 0 eng d |
| 040 ## - CATALOGING SOURCE |
|---|
| Original cataloguing agency |
EG-GICUC |
| Language of cataloging |
eng |
| Transcribing agency |
EG-GICUC |
| Modifying agency |
EG-GICUC |
| Description conventions |
rda |
| 041 0# - LANGUAGE CODE |
|---|
| Language code of text/sound track or separate title |
eng |
| Language code of summary or abstract |
eng |
| -- |
ara |
| 049 ## - Acquisition Source |
|---|
| Acquisition Source |
Deposit |
| 082 04 - DEWEY DECIMAL CLASSIFICATION NUMBER |
|---|
| Classification number |
634.62 |
| 092 ## - LOCALLY ASSIGNED DEWEY CALL NUMBER (OCLC) |
|---|
| Classification number |
634.62 |
| Edition number |
21 |
| 097 ## - Degree |
|---|
| Degree |
M.Sc |
| 099 ## - LOCAL FREE-TEXT CALL NUMBER (OCLC) |
|---|
| Local Call Number |
Cai01.07.09.M.Sc.2025.Me.P |
| 100 0# - MAIN ENTRY--PERSONAL NAME |
|---|
| Authority record control number or standard number |
Mennatalh Abdelhakem Hassan, |
| Preparation |
preparation. |
| 245 10 - TITLE STATEMENT |
|---|
| Title |
Production and evaluation of new products from some dates / |
| Statement of responsibility, etc. |
by Mennatalh Abdelhakem Hassan ; Supervisors Dr. Abd El-Rahman M. Khalaf-Allah, Dr. Tarek Gamal Abedelmaksoud, Dr. Mostafa Taha Mohammady Assous. |
| 246 15 - VARYING FORM OF TITLE |
|---|
| Title proper/short title |
انتاج وتقييم منتجات جديده من بعض أصناف البلح |
| 264 #0 - PRODUCTION, PUBLICATION, DISTRIBUTION, MANUFACTURE, AND COPYRIGHT NOTICE |
|---|
| Date of production, publication, distribution, manufacture, or copyright notice |
2025. |
| 300 ## - PHYSICAL DESCRIPTION |
|---|
| Extent |
91 pages : |
| Other physical details |
illustrations ; |
| Dimensions |
25 cm. + |
| Accompanying material |
CD. |
| 336 ## - CONTENT TYPE |
|---|
| Content type term |
text |
| Source |
rda content |
| 337 ## - MEDIA TYPE |
|---|
| Media type term |
Unmediated |
| Source |
rdamedia |
| 338 ## - CARRIER TYPE |
|---|
| Carrier type term |
volume |
| Source |
rdacarrier |
| 502 ## - DISSERTATION NOTE |
|---|
| Dissertation note |
Thesis (M.Sc)-Cairo University, 2025. |
| 504 ## - BIBLIOGRAPHY, ETC. NOTE |
|---|
| Bibliography, etc. note |
Bibliography: pages 52-70. |
| 520 #3 - SUMMARY, ETC. |
|---|
| Summary, etc. |
This study aimed to evaluate the physical, chemical, microbiological, and sensory <br/>characteristics of nectar produced from four Egyptian date cultivars: Barhi, Samani, and <br/>Zaghloul (rutab dates at the Khalal stage), and Siwi (semi-dry dates). It also investigated <br/>the volatile compound composition of these dates. The nectar was processed at different <br/>pH levels (4.5, 5.0, 5.5, and 6.0) with a total soluble solids concentration of ~15.5% and <br/>stored at 4°C for six months. The date nectars were evaluated sensory, color <br/>characteristics, sugar content, total phenolic, flavonoids, antioxidant activity, and <br/>microbiological evaluation after processing and during storage period. Sensory evaluation <br/>results showed that the best acceptability of nectar produced from Barhi, Samani, and <br/>Zaghloul was achieved at pH 6.0, while Siwi date nectar achieved the highest values at <br/>pH 5.5. The results showed no significant differences in total soluble solids, pH, and <br/>acidity between Barhi, Samani, Zaghloul, and Siwi nectars. However, significant <br/>differences were observed in color characteristics, with Barhi nectar recording the highest <br/>levels of brightness (L*) and yellowness (b*), while Siwi nectar recorded the highest <br/>values in redness (a*), total phenolic and flavonoid content, and antioxidant activity <br/>during storage. A slight decrease was observed in total sugars, while reducing sugars and <br/>microorganism counts increased slightly, but remained within acceptable limits. The <br/>volatile compounds of date cultivars (Barhi, Samani, and Zaghloul) at the Khalal stage <br/>and Siwi (semi-dry) at the Tamr stage were analyzed using solid phase micro extraction <br/>(SPME) and gas chromatography-mass spectrometry (GC–MS). 69 volatile aromatic <br/>compounds were identified, including aldehydes, alcohols, esters, ketones, terpenoids, <br/>ethers, and hydrocarbons. Barhi dates were characterized by high levels of aldehydes, <br/>ketones, ethers, and esters, while Zaghloul recorded high levels of aldehydes and ethers. <br/>Samani was characterized by ketones and esters, while Siwi contained 48 aromatic <br/>compounds, including aldehydes, ethers, and ketones. Among the main compounds that <br/>contributed to the distinctive flavors of the wet cultivars were β-(Z)-2-butenal and β-<br/>methyl ionone. These results demonstrate the effect of pH on nectar quality and the <br/>variation in nutritional and aromatic properties between different varieties. This <br/>maximizes the use of Egyptian dates in the production of high-quality nectar products with <br/>a distinctive flavor, which contributes to enhancing the use of these rutab and semi-dry <br/>varieties in the food industry |
| 520 #3 - SUMMARY, ETC. |
|---|
| Summary, etc. |
تهدف هذه الدراسة إلى تقييم الخصائص الفيزيائية والكيميائية والميكروبيولوجية والحسية للنكتار المنتج من أربعة أصناف مصرية من التمور رطبة في مرحلة الخلال) و تمور نصف جافة . بالإضافة إلى تركيب المركبات المتطايرة لهذه التمور. تم تصنيع النكتار عند درجات مختلفة من الرقم الهيدروجيني و تركيزالمواد الصلبة الزائبة 15.5% والحفظ على درجة حرارة 4 °م لمدة ستة أشهر. تم تقييم النكتار التمر حسيًا وفزيائيا وكيميائيا وميكروبيولوجى بعد التصنيع مباشرة واثناء فترات التخزين .أظهرت نتائج أفضل درجة قبول للنكتار المنتج من البرحي و السماني والزغلول كانت عند pH 6.0 بينما حقق نكتار التمر السيوى أعلى القيم عند pH 5.5 . تم تحليل المركبات المتطايرة للأصناف التمر فى مرحلة التمر باستخدام تقنية الاستخلاص الدقيق الطوري الصلب (SPME) والجهاز الكروموتوجرافيا الغازى المتصل بمطياف الكتلة (GC–MS) تم تحديد 69 مركبًا عطريًا متطايرًا و شملت الألدهيدات و الكحوليات و الإسترات و الكيتونات و التربينويدات و الإيثرات و والهيدروكربونات. من بين المركبات الرئيسية التي ساهمت في تمييزالنكهات فى الاصناف الرطبة مركبا β-(Z)-2-butenal و β-methyl ionone. .توضح هذه النتائج تأثير الرقم الهيدروجيني على جودة النكتار والتباين في الخصائص الغذائية والعطرية بين الأصناف المختلفة تعظيم الاستفادة من التمور المصرية في تصنيع منتجات نكتار عالية الجودة و نكهة مميزة مما يساهم في تعزيز الاستفادة من هذه الأصناف الرطبة والنصف جافة في الصناعات الغذائية. |
| 530 ## - ADDITIONAL PHYSICAL FORM AVAILABLE NOTE |
|---|
| Issues CD |
Issues also as CD. |
| 546 ## - LANGUAGE NOTE |
|---|
| Text Language |
Text in English and abstract in Arabic & English. |
| 650 #0 - SUBJECT ADDED ENTRY--TOPICAL TERM |
|---|
| Topical term or geographic name entry element |
Date |
| 650 #0 - SUBJECT ADDED ENTRY--TOPICAL TERM |
|---|
| Topical term or geographic name entry element |
البلح |
| 653 #1 - INDEX TERM--UNCONTROLLED |
|---|
| Uncontrolled term |
Date |
| -- |
Nectar |
| -- |
Barhi |
| -- |
Samani |
| -- |
Zaghloul |
| -- |
Siwi |
| -- |
Volatile compound |
| -- |
date cultivars |
| -- |
SPME |
| -- |
GC–MS analysis |
| -- |
البلح |
| -- |
تمر |
| 700 0# - ADDED ENTRY--PERSONAL NAME |
|---|
| Personal name |
Abd El-Rahman M. Khalaf-Allah |
| Relator term |
thesis advisor. |
| 700 0# - ADDED ENTRY--PERSONAL NAME |
|---|
| Personal name |
Tarek Gamal Abedelmaksoud |
| Relator term |
thesis advisor. |
| 700 0# - ADDED ENTRY--PERSONAL NAME |
|---|
| Personal name |
Mostafa Taha Mohammady Assous |
| Relator term |
thesis advisor. |
| 900 ## - Thesis Information |
|---|
| Grant date |
01-01-2025 |
| Supervisory body |
Abd El-Rahman M. Khalaf-Allah |
| -- |
Tarek Gamal Abedelmaksoud |
| -- |
Mostafa Taha Mohammady Assous |
| Discussion body |
Khaled Fahmy Mahmoud |
| -- |
Sayed Saad Smuda |
| Universities |
Cairo University |
| Faculties |
Faculty of Agriculture |
| Department |
Department of Food Science |
| 905 ## - Cataloger and Reviser Names |
|---|
| Cataloger Name |
Shimaa |
| Reviser Names |
Eman Ghareb |
| 942 ## - ADDED ENTRY ELEMENTS (KOHA) |
|---|
| Source of classification or shelving scheme |
Dewey Decimal Classification |
| Koha item type |
Thesis |
| Edition |
21 |
| Suppress in OPAC |
No |