叶绿素a和脱镁叶绿素a均可溶于乙醇、乙醚、苯和丙酮等溶剂,不溶于水,而纯 品叶绿素a和脱镁叶绿素α仅微溶于石油醚。叶绿素b和脱镁叶绿素b也易溶于乙醇 乙醚、丙酮和苯,纯品几乎不溶于石油醚,也不溶于水。因此,极性溶剂如丙酮、甲醇、 乙醇、乙酸乙酯、吡啶和二甲基甲酰胺能完全提取叶绿素 叶绿a纯品是具有金属光泽的黑蓝色粉末状物质,溶点为117~120℃,在乙醇溶液 中呈蓝绿色,并有深红色荧光

目录 实验一水分的测定(烘重量法) 实验二食品水分活度的测定(直接测定法) 实验三食品水分活度(Aw)的测定(水分活度仪测定法)-- 实验四粗灰分的测定(干式灰化法)

Chapter F14 Power Notes Statement of Cash Flows Learning Objectives 1. Purpose of the Statement of Cash Flows 2. Reporting Cash Flows 3. Statement of Cash Flows The Indirect Method 4. Statement of Cash Flows -The Direct Method 5. Financial Analysis and Interpretation

Chapter F13 Power notes Bonds Payable and Investments in Bonds Learning Objectives 1. Financing Corporations 2. Characteristics of Bonds Payable 3. The Present-Value Concept and Bonds Payable 4. Accounting for Bonds Payable 5. Bond Sinking Funds 6. Bond Redemption 7 Investments in bonds 8. Corporation Balance Sheet 9. Financial Analysis and Interpretation

Chapter F11 Power notes Corporations: Organization, Capital Stock, Dividends Learning Objectives 1. Nature of a corporation 2. Stockholders'Equity 3. Sources of Paid-in Capital 4. Issuing Stock 5. Treasury Stock Transactions 6. Stock Splits 7. Accounting for dividends 8. Financial Analysis and Interpretation

Chapter F9 Power notes Fixed Assets and Intangible Assets Learning objectives 1. Nature of Fixed Assets 2. Accounting for Depreciation 3. Capital and Revenue Expenditures 4. Disposal of Fixed Assets 5. Leasing Fixed Assets 6. Internal Control of fixed assets 7 Natural resources 8. Intangible Assets 9. Financial Reporting 10. Financial Analysis and Interpretation

Chapter F7 Power notes Receivables Learning objectives 1. Classification of receivables 2. Internal Control of receivables 3. Uncollectible receivables 4. Uncollectibles- Allowance Method 5. Uncollectibles- Direct Write-Off Method 6. Characteristics of notes receivable 7. Accounting for Notes Receivable 8. Balance Sheet Presentation 9. Financial Analysis and Interpretation

Chapter F4 Power notes Completing the Accounting Cycle Learning Objectives 1. Work sheet 2. Financial Statements 3. Adjusting and Closing Entries 4. Accounting Cycle 5. Fiscal year 6. Financial Analysis and Interpretation

Chapter F2 Power notes Analyzing Transactions Learning objectives 1. Usefulness of an Account 2. Characteristics of an Account 3. Analyzing and Summarizing Transactions 4. Illustration of Analyzing and Summarizing 5. Trial Balance 6. Discovery and Correction of Errors 7. Financial Analysis and Interpretation

18.1电导分析的基本概念 电导是电阻的倒数